Vol. CXXXIX. No. 3594 OCTOBER II, 1946 9d. W E E K L Y ii E l e c t r ic a l R e v ie w October 11, 1946 The return of RUBBER

T h e Cable Makers' Associalion is glad io announce lhal supplies of natural Rubber and other materials

required for producing the highest classes of

insulating compounds are once more fully avail­

able, and that it has been able to re-establish,

for sale from 1st October, the well-known C.M.A.

grades of cable which have made its reputation

throughout the world.

sC.M.A. p e c i f y C^TIOly CABLES

Regdi Trade Mark Nos. 666. 585-6-7

MEMBERS OF THE C.M.A.

The Anchor Cable W . T. Glover & Co. Ltd. Liverpool Electric Cable Pirelli-General Cable Co. Ltd. Greengate & Irwell Co. Ltd. Works Ltd. (General British Insulated Rubber Co. Ltd. The London Electric Electric Co. Ltd. ) Callender’s Cables Ltd. St. Helens Cable & Connollys (Blackley) Ltd. W .T . Henley’s Telegraph W ire Co. and Smiths Ltd. W orks Co. Ltd. Rubber Co. Ltd. The Craigpark Electric Siemens Brothers & Cable Co. Ltd. Johnson & Phillips Ltd. The Macintosh Cable Co. Ltd. Co. Ltd.(Siemens Electric Crompton Parkinson The India Rubber, Gutta- Lamps and Supplies Ltd.) Ltd. (Derby Cables Ltd.) Percha & Telegraph The Metropolitan Standard Telephones Electric Cable & Enfield Cables Ltd. Works Co. Ltd. & Cables Ltd. Edison Swan Cables Ltd (The Silvertown Co.) Construction Co. Ltd. Union Cable Co. Ltd.

Advt. of (lie Cable Makers' Association, High Holborn House, 52-54 High Holborn, VV.C.I. Holbom 7533 9

A maintenance man in an Electricity Department doesn’t have much time for reflection in these days of shortage in materials and labour.

It’s always seemed to me as if Heatrae planned the design of their W ater Heaters from MY point of view and to save my legs from repeated journeys.

My experience is that HEATRAE are so nearly breakdown - proof that they need minimum attention from me.

Being only human, I appreciate that point.

leaders in electric water heaters

HEATRAE LTD., NORWICH • GRAMS : HEATRAE, NORWICH • PHONE : NORWICH 25131

IS IT ALIVE? SOUND TERMINAL WITHOUT SOLDER THE

“ PARTRIDGE ” Suitable for Telephone Lines

PRESSURE FOR CABLES 'ill 1 _ ■*) • SIZES FROM DETECTOR A N D WIRES t " to }- OF ALL KINDS HOLE (Regd. T.M. No. B.581955) will infallibly telllyou, giving visible and audible indication Ross Courtney & Co. L td . (No earth connection required) ASHBROOK ROAD, LONDON, N.I9 Type Range Length up to of handle

< H ) C Volts 1 1,000 36" 7 E 60,000 (F) 84" F 15,000 48" H 1 1,000 36" FUEL INJECTORS L 33,000 72" PlSiTB©!-..

Also makers of “ Westmins­ Makers of all types of re­ petition products from ter” Vacuum Tube Detector the bar In all metals and H.T. Earthing Rods

Patent No. 619919 The WESTMINSTER ENG. Co. Ltd Victoria Road, Willesden Junction, N.W.IO M CL ^ REPETITION I?? Telephone : Telegrams : POOL LANE • LANCLEY BIRMINCHAM Elg a r 7372 (2 lines) “ Regency, Phone, London ■Plionf BRO.nl., IU5(*lm«i) BROarf'w.ll 1757 2 E l e c t r ic a l R e v ie w October 11, 19^6

For so long have Priorities and Permits controlled the Nation's very existence that there is a marked tendency to accept a " Make-do ” state of affairs.

The lessened demand made by Government and Service departments has left us free to plan our output with a considerable degree of accuracy so that we are now in that happy position speedily to meet all requests for

Mining Ropes, Marine Ropes, Engineering Ropes of every description; Capels, Swaged Fittings, Clips, Blocks, Slings, Loops and all other accessories.

of various types, also Bars.

m m w r n M i

for every conceivable purpose.

for Shipping, Agriculture and Transport.

RITI5 H B O P

HEAD OFFICE OFFICES.WORKS £ D O N C A S T E R STORES THROUGHOUT CREAI BRITAIN October 11,1946 E l e c t r ic a l R e v ie w 3

PROTECTED MOTOR capable of arduous duty for unlimited periods, silent, efficient

BROOK//^ MOTORS

HUDDERSFIELDENGLAND 4 T l f c t r ic a l R e m e w October 11, 1946 Octobei 11,1946 E l e c t r ic a l k f v ie w 5 b X e l e c t r ic w in d in g JW EQUIPMENT

6,600 V O L T A.C. WINDING EQUIPMENT A T A SCOTTISH COLLIERY

MOTOR 3.900 H.P. Peak, 423 R.P.M.. 6,600 volts. STATOR CONTROL 6,600 volt Reversing Contactors. Three breaks in series per phase. Electrical and Mechanical Interlocking. Potential Interlocking on three phases. D C. Operating Magnets.

BTH products include all kinds of electric plant, Mazda lamps, and Mazdalux lighting equipment, far service ABOVE or BELOW GROUND. SPECIFY BTH

B T H RUGBY 6 E l e c t r ic a l R e t o w October 11, ^ 4 6

Rothihill CABLE INSULATING PAPER iU C H M U I 4 LONDON MANCHESTER WfWINGMii. TliM il fyiW lfK t Cp. j t d . M°Ll!EHAhK[NCH 1 Tu

c u t S w

t c S m x r k e ,

r J t u r t d v

C electrostatic

rrecipitators

Full particulars on application

STURTEVANT ENGINEERING CO. LTD., 25 WORCESTER RD„ SUTTON, SURREY. LONDON OFFICE: VICTORIA STATION HOUSE, VICTORIA ST., S.W.I October 11, 1946 E l e c t r i c a l R e v i e w 8

LICHFIELD CATHEDRAL

St. Chad was the first Bishop of Lichfield. The Lady Chapel contains some fine Flemish glass of the sixteenth century

CRYSE

MADE IN ENGLAND

F I FTY YEARS OF QUALITY & SERVICE

BIRMINGHAM BURY ST EDMUNDS LEEDS LONDON BRIGHTON CARDIFF LEICESTER MANCHESTER BRISTOL GLASGOW LIVERPOOL NEWCASTLE

CRYSELCO LIMITED KEMPSTON WORKS, BEDFORD October ii'ii ■ h'i i i w h TIH I S I TED E IT LIM S E L B A C ’S R E D N E L L A C D E T A L U S IN ISH IT R B

11 . , th o u san d m iles of flam e-proof signal cables a t hom e and overseas, overseas, and e hom t a cables signal e-proof flam of iles m d san u o th indicates th e confidence of th e R ailw ay In d u stry in th e technical ability ability technical e th in stry u d In ay ailw R e th of confidence e th indicates vsr Srie n l eetiiain rbe s. problem electrification all on Service allender’s. C .I. B dvisory A of ill sk g rin factu u an m and 1946 K HOUS, TET LONDON W. .2 .C W N O D N O L STREET, K L O F R O N SE, U O H LK O F R O N T he provision of some tw o th o u san d m iles of tra c k and m any any m and k c tra of iles m d san u o th o tw some of provision he T R ailw ay engineers are in v ited to consult B .I. C allender’s Technical Technical allender’s C .I. B consult to ited v in are engineers ay ailw R E cal a ic r t c e l R ew ie v e m m w October 11, 1946 10 E l e c t r ic a l R e v ie w

mOFFflT ELECTRIC COOKERS

can be fitted into any scheme, individually or in bulk, the same beautiful porcelain enamel finish and distinctive colour tones dis­ tinguish all models.

Your problem may be a housing estate, or a luxurious home. You may be interested in one unit or a planned kitchen. W e have designed and created Models for every occasion. Just give us an idea of your problem and let us send you a fully explanatory reply which will also tell you about the many features which have made M O FFA T Electric Cookers famous throughout the world. October 11, 1946 E l e c t r ic a l R e v ie w 11

I kW h.PER 10 DIVISION 1

\£§5/ N iB ' 10000 1000 100 10 aaMMWiWW"" " g ' ' ■ ' W

EMPERATURE

FERRANTI LIMITED HOLLINWOOD - LANCS London OFFice KERN HOUSE • KINGSWAY ■ W.C. 3 FM S5 p Electrical Review October 11, 1946 O V ER LAMP REFLECTORS THORMX f o r g a s f il l e d l a m p s

FOR EASY MAINTENANCE—THE BEST.

W a tt. 4 1// T S 170 12" 40-60 8 f - 4 1// 8 T S 175 14" 100 1 8 9/9 T S 177 14" 150 1■ Ua f 9/9 T S 904 14" 100 BC 18/- T S 906 14" 150 BC 18/6 661% T S 908 14" 150 ES 19/9 Advance. SLIP-IT-ON. T S 910 16" 200 ES 2 1 /6 SLIP-IT-OFF. T S 912 18" 300 G 30/6 T S 914 18" 500 G 33/- OVER THE LAMP T S 916 20" 750/1000 G 38/6 FOR CLEANING.

Thorlux Overlamp Maintenance Scheme. Have one spare clean reflector. Remove dirty one (lift, turn, and it’s off). Replace with clean one. Repeat over whole installation. Thorlux Wiring Box. Remove Lid, connect Mains and Earth, Replace Lid— Job ’s done (The Wirem an’s Friend). A SUCCESSFUL & MOST POPULAR HIGH QUALITY REFLECTOR, IN LARGE DEMAND BY GOVERNMENT DEPTS., LARGE & SMALL INDUSTRIAL PLANTS. SAMPLES— With Pleasure.

F W THORPE L T D .^ æ S BIRMINGHAM Telegrams THORLUX'B'HAM 28 Telephone: SPRiHCr/£LD 33/g_ ^28 U October 11, 1946 E l e c t r ic a l R e v ie w 13

Henley's offer a wide range of overhead service accessories which are of robust construction and simple to install. The designs incorporate all those features, based on long and specialised exper­ ience, which the discriminating engineer looks for in such accessories. Here are a few typical items from the wide range available.

INSULATING SHROUD for nut type service taps. Insulates neatly and efficiently. NUT TYPE SERVICE TAP specially designed to prevent loosening due to vibration.

VICE TYPE SERVICE TAPS In two sizes, for a VICE-TYPE SERVICE CONNECTORS wide range of line for jumper connection work at “ non­ and service wires. tension ” junction points.

ELECTRICAL DISTRIBUTION EQUIPMENT W. T. HENLEY’S TELEGRAPH WORKS CO. LTD., 51-53 HATTON GARDEN, E.C.I 14 E l e c t r ic a l R e v ie w October 11, 1946

A KANCt OT P f f k l u S P U S H atCTRIC SITS

* F. Perkins Ltd., maintain a highly trained technical electrical staff whose services are at the disposal of enquirers. •I* Perkins Engines are designed for much higher speeds and much higher ratings than those used in their Generating Sets. «!• Perkins Diesel Electrical Sets are light in weight and thereby easily transportable. •5» Starting can be by hand, electric motor, or automatic.

O f ) « o 'P&'M h S DIESEL ENGINES

[ToRGoobs and' passenger vehicles, ihoustriai amp marine tpFuatiowTj

F. Perkins Ltd., Dept.E.R, 73 Lincoln Road, Peterborough. Phone: 4201 October 11, 1946 E l e c t r i c a l R e v i e w 15

*

“You see, son” said the foreman, “No man living can twiddle his wrist. So far and no farther is where it will go, see? That’s nature, see ? If you twist your wrist you’ve got to untwist it before you can twist it again. See?” “It is a case of trochilics ” said the Superior Apprentice. “The inter-relation between the scaphoid, unciform, trapezoid and associated bones and ligaments of the wrist is such that it is mechanically incapable of trochilic movement and thus fundamentally unsuited to such rotary action as putting on nuts or screwing in screws.” The foreman breathed heavily - “I never said no such thing, I said the proper way to screw in screws is with a Desoutter power tool.” “ An opinion” said the Superior Apprentice “ with which I entirely concur.”

u n u u i i crv Specialists in Lightweight, Pneumatic and Electric Portable Tools.

DESOUTTER BROS. LTD. (DEPT. R ). THE HYD E. H EN D O N . LO NDON, N .W .9. TELEPH O N E: COLINDALE 6346-7^-9 October 1 1 ,1 9 4 6 16 E l e c t r ic a l R e v ie w

THE PORTABLE [LECTNC CLOTHES HORSE

VAR I AC REGULATING TRANSFORMERS ,te the

The Type 50 B Variac, handling 7 kVA at 230 V in represents This remarkable new drier is now in a valuable addition to the Variac quantity production and stocks are available to range,and will find many applications recognised retailers. If you have not sent in a in industry. request for information you are invited to do so. The LECTROSS portable electric clothes horse 50 B 7 k V A input 230 V (tap at 115 enables every woman to be sure that her urgently V ), output 0-230or0-270V. Rated needed personal laundry is thoroughly dried and current 20 amps. Max. 31 amps. aired, even on damp and rainy days. Safe— it cannot harm baby or scorch the most delicate Excellent deliveries can be arranged. Most fabrics. Economical— its B L A C K H EA T element types are in stock. Other Variac types range never glows and consumes less than one unit from 165 watts to 7 k W . W rite for bulletin per hour. Specially useful to the young mother. 424 £ and circular 145 £ for complete data. Supplied with chromium rails & w h iteo r pastel bases. JOHN A.GREY J 1 ELECTRICAL AND RADIO LABORATORY APPARAT(IS ETC | AND PARTNERS LTD.

180 Tottenham Court Road, London,W.l PICCADILLY HOUSE, LONDON, S.W.l And 76gOldhall Street, Liverpool 3, Lancs October 1 1 ,1 9 4 6 E l e c t r ic a l R e v ie w 17

Land of Hope and Glory

I see her not dispirited, not weak, but well remembering that she has seen dark days before — indeed with a kind of instinct t-hat she sees a little better in a cloudy'day, and that in storm and battle and calamity she has a secret vigour and a pulse-like cannon; I see her in her old age, not decrepit, but yodng, and still daring to believe in her power of endurance and expansion. Seeing this I say, All Hail ! Mother of Nations. M other of Heroes, with strength ecju|l to the time. R. W. Emerson. _.R - E • A • L L vRowlahds Electrical Accessories Ltd. Birmingham, England E l e c t r i c a l I ...... You'll be needing Power FOR THAT REBUILT FACTORY

. . . and this time you want an installation planned for

the future. New processes . . . new developments . . .

new extensions — they will all come along and your

electrical installation must be prepared to meet the new

calls. A J. & P. planned and executed installation

is designed for the future as well as the present—

in every way it will pay you to October 11, 1946 ’ E l e c t r ic a l R e v ie w T INSPIRE CONFIDENCE BY INSTALLING

A TYPICAL EXAMPLE— D2I0 S W IT C H B O A R D

This 660 volt oil-break switchgear ranges from 100 to 1,600 amps.

(£$} M. & C. SWITCHGEAR LTD. V^/ KELVINSIDE WORKS, KIRKINTILLOCH, .GLASGOW

SALES & SERVICE : OLIVE GROVE RD SHEFFIELD. 2. LONDON OFFICE ; 36 VICTORIA ST., S.W.I L ______- ______1 20 E l e c t r ic a l R e v ie w October 11, 1946

its possible to turn a hair on a PULTRA MICRO-LATHE

The ability to perform such a delicate opera­ tion is evidence of the efficiency and versatility of Pultra Lathes and their equipment. They are ideal for al small work calling for maximum accuracy.

Write for Catalogue CA4.

PULTRA LTD.24.gravel lan e,salfo rd 3.manchester Phone: BLA. 9181.

M INERVA ELECTRICAL

In . su loLpm >SI

STOVING VARNISHES \Salural Resin Type) ... Black and Clear STOVING VARNISHES (Synthetic Resin Type) ... Black and Cle r THERMO-SETTING VARNISHES Black and Clear All Varnishes conform to AIR-DRYING VARNISHES ...... Black and Clear U.S. Specifications wherever CLOTH VARNISHES ...... Black and Clear applicable. SLEEVING VARNISHES ... Black, Clear and Colours CORE-PLATE VARNISHES [Stovingand Air-drying) Black and Clear Please submit your problems to COPPER-WIRE ENAMELS ...... Black and Clear uur Electrical IN SU LA I 1NG ACID AND HEAT-RESISTING ENAMELS ... All Colours VARNISH TECHNICAL CABLE LACQUERS ♦ MICA BONDING VARNISHES DEPARTMENT. COMPOUNDS PINCHIN JOHNSON 15 CLIFFORD STREET « LONDON • W.1 Telephone: REGent 7471 October 11, 1946 E l e c t r ic a l R e v ie w 21

Siemens Electric Lamps & Supplies Ltd., 38/39 Upper Thames St., London, E.C.4.

branches at Belfast, Birmingham, Bristol, Cardiff, Dublin, Glasgow, Leeds, Liverpool, Manchester Newcastle-on-Tyne, Nottingham, Sheffield. E l e c t r ic a l R e v ie w October 11, 1946 2 2

Cutting teeth Darwins Hacksaws have what it takes when it comes to cutting teeth ! They cut and cut and come again ; even on hard abrasive materials they go on cutting for the longest possible useful life.

If you want true economy in hacksaw purchasing, turn to Darwins Hacksaws— they give most cutting for your money.

II A It W I INI S TOLEDO DARWINS LIMITED ■ ANDREWS TOLEDO LIMITED SHEFFIELD• LONDON • BIRMINGHAM

ASSURANCE MADE DOUBLY SURE . ..

The assurance of a good time at the Trocadero is made -% at the doubly sure because the lighting of the Restaurant is safeguarded by the Katholite Emergency Lighting TROCADERO System which incorporates a D.P. Battery. RESTAURANT

T P B A K E W E L L L o n d o n O f f i c e : 50 Grosvenor THE D.P BATTERY C° L. DERBYSHIRE 1 Gardens. Victoria. S.W 1 . October 11,1946 E l e c t r ic a l R e v ie w 23 tt,n

*)Mï in is ä Wte;

CHECK THESE FEATURES —Features that emphasise

the«.lueof W W W ELECTRIC COOKERS

E.D.A. Interchange­ ability (Grill Boiler Pressed Steel Hob and Boiling Plate). with Chromium Plated finish. Simmering device if required. Thermostatic Oven Control. Precision building on modern Power tracks Plug-in Elements ensure easy recondi­ ©tioning. throughout. JACKSON 192 SERIES IV. All these features plus —the exceptional fine quality—well planned mechanical construction—completely dependable electrical per­ E.D.A. Earthing formance—make the Jackson Cooker the logical throughout. choice of all who buy with an eye to the future. 0 1 : JACKSON ELECTRIC STOVE CO. LTD., 143 Sloane Street, S.W .l ’PHONE : SLOane 6248 2 4 E l e c t r ic a l R e v ie w October 11, 1946

Pulley wheel to carry tonlrol cables /or rudder and ailerons on Hors a glider, machined from Bakelile Laminated.

BAKELITE

REGD. TRADE MARKS LAMINATED for hard service

Bakelite Laminated combines lightness with re­ markable toughness. It is resistant to water, heat, a d d , chem icals, oils, abrasion . . . gives excellent electrical properties . . . and can be machined to fine limits. The tensile strength of one standard grade exceeds 18,000 lb. p er square inch. Available in 40 different grades and a variety of forms i n c lu d in g sheets up to 6 inches thick, rods, tubes and special shapes. Further information on request. If you want to know BAKELITE LIMITED the time—ask a police­ Pioneers in the Plastics World m an. If you w ant a 18 GROSVENOR GARDENS • LONDON • S.W.I 159 motor rewound — ask Collins. Collins, Britain’s Premier Elec­ trical Repair Service, here show a 2,120 h.p. auto synchronous rotor rewind. Every rewind by Collins is guaran­ teed. COLLINS Collins Electrical Ltd.

IIS Clerkenwell Road London E C ! Holbom 0212-3-4 22 St. Albans Place Upper St. Islington N I i Canonbary 3227-8 M 9 4c 11 Feather stone Rd. Southall L. Southall 0168 .

saw ell advertising TWYNING ROAD, STIRCHLEY, BIRMINGHAM Tel.: KJNgs Norton2901 (3 lines.) Grams: Radiagills, B ’Iwtl October 1 1 ,1 9 4 6 E l e c t r ic a l R e v ie w RELIABLE SWITCHGEAR is the key’to Efficiency \ \ in Industry

REYROLLE

We have a comp: ensive range of switchgear for all i striai applications evolved from on experience and proved by sho cuit testing REYROLLE HEBBURN-ON-TYNE ENGLAND 26 E l e c t r ic a l R e v ie w October 11, 1946

INDUSTRIAL

LIGHTING UNITS

Tw o views of the same unit, closed and partly exten­ M EK E LIT E Industrial Lighting Units are available ded to illustrate with various lengths of arms and pillar. Bases for range of movement (scale I /10 full size) wall, bench or machine mounting; for conduit or side entry with clamp for supply cable. Also heavy bases for portable use. Small reflectors for 12-volt lamps can be supplied.

Catalogue sent free on request.

MEK-ELEK Engineering Ltd., 17 Western Road, Mitcham, Surrey Ph o n e : MITcham 3072 Cables: Mekelek. London

Main features of Standard Model: High Speed. Short transit time. Negligible distortion up to 300 c.p.s. Contact gap a function of input power, hence small distortion almost down to failure point. High contact pressures. No contact chatter High sensitivity—robust operation a t 5mV.A. a t 100 c.p.s. 01 0.2mW.D.C. Great ease of adjustment. Magnetic bias adjustment giving absolutely smooth control. Balanced armature—hence immunity to considerable vibration and no positional error. DIMENSIONS IN COVER 2 ix1 i^ rx4 i: WEIQHT with standmrd socket : 22 ozs.

Write for details and test data.

TELEPHONE MANUFACTURING Co.Ltd HOLLINGSWORTH WORKS, DULWICH, LONDON, S.E.21 Telephone: GIPsy Hill 2211 (, o linej ) October 11, 1946 E l e c t r ic a l R e v ie w 27

fenn pkk wafct

»trlki

ELECTRIC HEATING APPLIANCES

Supplies are still limited but distri­ bution is being carried out as fairly as possible.

inch ondm1

RP II3SD October 11, 1946 28 E l e c t r ic a l R e v ie w RUBBER BONDERS I I I» \ are now able to offer facilities to all Industries for the solution of problems in VIBRATION

# “ FLEXILANT ” Vibration-absorbing Mountings # “ FLEXILANT” Pinions and Gear Wheels # “ FLEXILANT” Vibration-absorbing Couplings # “ FLEXILANT” Seals and Pressure Fittings

LITERATURE AVAILABLE ’ •• The SHORT REVIEW " “ The • FLEXIBLE ' COMMENTARY ” 40 pages of information on the A standard work of 175 pages covering very uses of r-ubber bonded to metal, thoroughly, the broad subject of bonding to rubber.

/(fen, XmdtV ¿rfeth*- a, '¿ended *rtndd

¿fffu.r • /Ale, sLndd ^eu, afikcci * # .

^ RUBBER BONDERS LIMITED • FLEXILANT WORKS • DUNSTABLE • BEDS. ^

THE For auick and efficient “ FLUXITE QUINS” A T W ORK identification “ I 'm sure something’s tcrong xcith this kite. for marking cables, W e've I or gotten to fix something tight components, etc., in I t m a y possibly be tee soldered, ” cried EE, the Electrical and “ W ithout the usual F L U X I T E ! " Wire'ess For all SOLDERING work—you need FLUXITE- Trades. the paste flux—with which even dirty metals are soldered and “ tinned.’* For the jointing of lead —without solder and the “ running ” of white m etal bearings—w ith o u t “ tinning ” the bearing. It is suitable for ALL METALS—excepting ALUMINIUM—and can be used with safety on ELECTRICAL and other sensitive apparatus. With FLUXITE joints can be “ wiped ” success­ fully that are impossible by any other method. U sed for o v er 30 years in G overn m en t works and BUTTERFLY BRAND by leading Engineers and Manufacturers. OF ALL IRONMONGERS in tins—I0d., I 6 and 3/-. The “ FLUXITE GUN ” puts FLUXITE where you IDENTIFICATION TAPE want it by a simple pressure. Price 1/6 or filled 2/6 SELF-ADHESIVE FINGER TIP SEALING SAMUELJONES FLUXITE & CO. LTD SIMPLIFIES ALL SOLDERING 16 -17 N E W BRIDGE STREET, E.C.4 Write for Leaflets on Case-Hardening Steel and Tempering Tods TELEPHONE CENTRAL 6500 I with FL I X IT E , also on “ Wiped " joints. Price Id. each.

FLUXITE LTD. (Dept. R.E.), Bermondsey St., S.E.I October 11, 1946 E l e c t r ic a l R e v ie w 29

If magic could make snitchgear

If switchgear could be produced out of the hat, the present heavy demand for M.E.M. gear could be met without delay. E v e r y t h i n g s h o r t o f m agic is being «lone, and in spite of labour and material shortages, controls and restrictions, the output of M.E.M. goods is mounting every day. The task of distribution falls to the wholesaler and he is doing a magnificent job in allocating all available goods fairly and equitably. Keep in touch with him and he wili see that you are served as quickly as supplies permit.

MIDLAND ELECTRIC MANUFACTURING CO. LTD.,TYSELEY, BIRMINGHAM, 11 SWITCH, FUSE AND MOTOR CONTROL GEAR, ELECTRIC FIRES AND LOCALISED LIGHTING EQUIPMENT

London Showrooms & Stores: 21-22 Rathbone Place, W . 1 Manchester Showrooms & Stores: 4 8 -5 0 C hapel Sr., Sallord, 3 October 11,1946 30 E l e c t r ic a l R e v ie w BRITANNIA CERAMIC INSULATORS the outstandingly successful FOR RADIO battery for ELECTRIC VEHICLES

A LSO FO R HIGH TENSION LOW TENSION AND REFRACTORIES

A Britannia Battery used fo r driving a JAMES MACINTYRE & Co. Ltd. locomotive belonging to an important ordnance WASHINGTON WORKS depot. BURSLEM A Graiseley Hand- truck driven by a B r i t a n n i a Battery.

LiONGj trouble-free life, with consequent low operating costs, is the outstanding characteristic of Britannia vehicle batteries which has won for them a reputation second to none. J h u n t The special construction of the cells makes them extremely reliable under the most exacting working conditions, and enables them to withstand the severest stresses of heavy duty. Britannia batteries are chosen to drive vehicles of all types and T & egulatori sizes—from locomotives to hand trucks. For Motors, Generators and Alternators. Also as Series Regulators for voltage, heat and speed control. W e shall be pleased to send full particulars and prices on request. And remember, the advice of Cressall Technicians is always available. LEAD ACID VEHICLE BATTERIES

* is the Registered Trade Name of BRITANNIA BATTERIES LIMITED THE CRESSALL MANUFACTURING CO. LTD. REDDITCH, WORCS. Tower Street, Birmingham 1». Telephone : A STo n Cross 3463-4. ■ H K ü id b.t. 8/41 Telegrams . " OHMIC.” Birmingham. October 11, 1946 E l e c t r ic a l R e v ie w 31 Complete Fire-Alarm Schemes for Large or Small Premises

0 In principle, one Fire - Alarm W hether planning a new installation, System is very much like another, but or bringing an old one up to date, you experience shows that different es­ are invited to take advantage of that tablishments often require individual experience— without obligation, of course. treatment if adequate and efficient

protection is to be obtained for a A N E W BOOKLET. As a preliminary reasonable outlay. you may like to have a copy of our new Fire-Alarm Booklet. Ask for Here, Electrical Engineers and Con­ Book I, Section 2b(ER). tractors will find our technical staff helpful. They have made a special study of these problems and know the scope of the accessories at their GENTS’ disposal. ^ m O F L E I C E S T E R

Makers of Electrical Equipment since 1872

GENT & CO., LTD., FARADAY WORKS, LEICESTER • LONDON OFFICE, 47 VICTORIA STREET, S.W.I MAKERS OF FIRE AND BURGLAR ALARMS • LUMINOUS CALL SYSTEMS • STAFF LOCATOR SYSTEMS ELECTRIC IMPULSE AND SYNCHRONOUS CLOCKS • PROCESS TIMERS . LIQUID LEVEL APPARATUS WATCHMAN'S CLOCKS • MINE SIGNALLING EQUIPMENT . BELLS» INDICATORS» TRANSFORMERS October 11,1946 32 E l e c t r i c a l R e v ie w

HART BATTERIES I------F O R ------i

ELECTRIC POWER LIGHTING INSTALLATIONS

BY APPOINTMENT Accumulator Makers to H.M. The King. HART ACCUMULATOR CO. LTD. MAftSHGATE LANE, STRATFORD, LONDON, E.I5. Telephones : MARyland 1361/3 Branches at Birm ingham , Bristol, Cork, Dublin. Glasgow Manchester, Newcastle-on-Tyne, Nottingham and Westminster

A WIDE RANGE OF OKERIN W AX DI-ELECTRICS —created in our own laboratories and manufactured in our own works— supplies almost every requirement of Electrical Industry. Grades have been designed for operation under the most severe and varied conditions, and many are resistant to mould and fungus growth.

Special types are evolved as new demands CONDUIT TUBE arise, and technical discussion on manu­ facturers’ problems is welcomed. METALLIC SEAMLESS TUBE CO. LTD., LUDGATE HILL, BIRMINGHAM Telephone Temple Bar 5927. Phone : C E N 7167. Gram s : “ Flask,” Birmingham. Sales Depots :— London : 88 Goswell Road, E .C .I. Newcastle- Astor Boisselier & Lawrence Ltd. on-Tyne : St. John Street. Leeds : 5 York Place. Swansea : I Grove Place. Glasgow : 137a St. Vincent Street. Sales Dept. : Norfolk House' Norfolk Street, London, W.C.2 October 11, 1946 E l e c t r ic a l R e v ie w 33

Using a comparatively weak light source, the engraver made water serve as a light condenser. Holophane methods improve on this result on a much wider scale by the use of fixed scientifically calculated prisms moulded into the glass refractor, or combination of refractors which bend and re-direct the light to the areas where its work must be done. We have a Technical Advisory Depart­ ment anxious to help you and if you will submit your problems to us, our Engineers will suggest a solution.

HOLOPHANE

ELVERTON STREET, LONDON. S.W.I victoria 8062 (4 34 E l e c t r ic a l R e v ie w October 11, 1946 ARON METERS

IN AS GREAT DEMAND AS EVER

CONDENSERS

Especially for D ischarged Fluorescent Lighting: INcen Signs • A.C. Motors

A condenser service second-to-none fo r quality, value and deliveries.

The illustrations show a small selection of the comprehensive range of special T.C.C. types of Condensers designed for the continuous A .C . working conditions encountered in the use of Fluorescent Lighting, Neon Signs, and most types of A.C. Motors. Both cylindrical and rectangular types are compact and completely hermetically sealed, with the condenser element im­ pregnated in petroleum jelly under a high vacuum process. Can be supplied in an infinite variety of shapes and sizes, with convenient m ethods of m ounting to suit any requirements. T.C.C. Engineers are at your service for consultation. YEARS THE TELEGRAPH CaM^NSERCQ LTD:

NORTH ACTON • LONDON -Telephone. ACORN 0061 u, 19k October 1 1 ,1 9 4 6 E l e c t r ic a l R e v ie w

«

Ÿ1Ï LEARN FROM W H lC W

The picture shows a deliberate test-to-destruction at the Crompton Parkinson Short-Circuit Testing Station. From such tests come practical data that could be obtained in no other way—information that is used to make Crompton switchgear safe and sure in operation.

Crompton Parkinson Ltd. are members of the Association o f Short-Circuit Testing Authorities.

OMPTON SWITCHGEAR DESIGN

BEGINS IN THE TEST STATION

j / h CRomPTon PDRKinson LIMITED

ELECTRA HOUSE. VICTORIA EMBANKMENT, LONDON W.C.2. 36 E l e c t r ic a l R e v ie w O ctober 11,1946

s MALLER - lighter - more versatile than ever - with a choice of 100 different speeds between 90 r.p.m. and 5 revs, per hour; three- phase, D.C., and Universal motors; all without change n UDUGflD neco of dimensions. 1/8 h.p. at the final shaft GEARED 1110T0 R at 26 to 90 r.p.m., and 25 lbs. ft. at lower speeds. Oil- ^ immersed silent spur gears ; ^ oil-sealed gear box ; ball bearing famous NECO motor. \ > Unfortunately delivery takes time, but it’s worth a °* small delay.

NORM AND ELECTRICAL COMPANY LTD. North Street, Clapham Common, London, S.W.4 Telephone: MACaulay 3211-4 October II, 1946 E l e c t r ic a l R ev ie w 37

Performance and Advantages summarised

• HIGH OPERATING SPEED

• LOW OIL CONTENT

• DOUBLE BREAK PER PHASE

• ECONOMICAL SPACE REQUIREMENT

»VERTICAL ISOLATION

• INSPECTION IN SITU

The For further particulars apply to 4 \ Circuit Breaker FERGUSON, PAILXN LIMITED N G L A N D .„hi til M Phone; D A O YLSD EN 1301 (8 lines) L O N D O N : Temple Bar 8711/2 BIRMINGHAM : Erdinjton 3775 GLASGOW : Central S080 E l e c t r i c a l R e v i e w October 11, 1946

MOTORS GENERATORS TRANSFORMERS SWITCH SrCONTROL GEAR MERCURY-ARC & METAL- PLATE i RECTIFIERS I

4S0-B.H.P. TORQUE REACTION DYNAMOMETER 450 b.h.p., 1,000/1,400 r.p.m. by shunt control: also capable o] 250 b.h.p. down to 500 r.p.m. by armature voltage control. The main armature and field control panel of THE E.C.C. FLAT-BACK TYPE installed in a well-known Motor Car Works. ^ELECTRIC CONSTRl ICTIÖN WOLVERHAMPTON TELEPHONE • 214-SS - 7 UNfT> October 1 1 ,1 9 4 6 E l e c t r ic a l R e v iew 39

“ Fitness tor purpose" and sound construction are fundamental qualities ot “ W aif” electric tools' For example, an outstanding feature of “ Wolf ” Screw­ drivers is the specially designed type ot clutch action which prevents the "overrunning” ot screws. It is this meticulous attention to detail and intimate knowledge ot users' requirements that make the name "W o lf" synonymous with all that is best in design, construction and performance wherever electric tools are used. It pays to use " W olf" — fine powerful machines that carry the hall-mark of quality.

W o l F

. WOLF & COMPANY LTD., PIONEER WORKS, HANGER LANE, LONDON, W.5 11, 1946 4 0 E l e c t r ic a l R e v ie w October

v A s m * . - A .

2" DIA, SURFACE B66 FLUSH (for lug mounting boxes)C2066 ARCHITRAVE C66

SHORT-SLOW BREAK ON A.C. reduces “ arcing” to a mere pin-point spark

|. H. TDCBUt 8 (0. LTD., Ifings ltd., Tystlq, Birmirqlifliii II ( F i r c k c r TEL AC' Makers of First Grade Electrical Accessories for over 50 years October 11,1946 E l e c t r ic a l R e v ie w 41 Write for this Data Sheet ‘We can give you facts about Alum inium ’ has been our advertising them e for som e time. Now you can have our Data sheet — full of facts about our wrought and cast alloys; accompanied by useful general notes. It provides, in handy form , answers to m any questions raised by engineers and designers, and w ill prove a very useful reference. If additional inform ation is required, our Technical Development Departm ent is always at your service. The W rought Alloys table shows approximate com position, prin­ cipal specifications, and mechanical properties. The corrosion resistance of these alloys, and their am enability to m achining, forming, welding and ano- dising, are indicated. The general notes touch briefly on allo yin g; resistance to corrosion; m achining and polishing; PfiM D A IIV I IM IT C n w elding and soldering ; frictional proper­ ly U III I A R I LI III ! c L U t i e s ; resistance to denting ; a n o d i s i n g ; BANBURY, OXON. Makers of NORAL Products and forming, pressing and deep drawing.

LAND & MARINE WATERTUBE BOILERS

YARROW & CO. LTD. SCOTSTOUN GLASGOW October 1 1 ,1 9 4 6

These approved and certified Conduits and Fittings are consistently reliable under the mostarduousconditions of service. You can specify none better. HILDICK &c HILDICK UNO AT L O N D O N B IR M IN G H A M . CARDIFF. GLAS GOVT & MANCHESTER WALSALL TUBE WORKS PLECK ROAD WALSALL . WAML.2 « J. London Stores: 9 Howland Mews West. Howland St., W .l . Phone: Museum 6225

What could be fairer— or more likely to show the dealer a generous profit margin? There is no ‘ middleman ’ in the VACTRIC scheme of selling, so it w ill be you who will reap the benefit of the nation-wide advertising campaign recently launched. NOT JUST TO-DAY — WE’VE ALWAYS SOLD THIS WAY A t present available ( I ) the £ 13s. 13s. Od. plus P.T. (in- Junior (Upright) £12.12s.0d. eluding Dusting Tools) plus P.T. (Dusting Tools (3) the new 3-Brush Floor

(2 ) the W . I 00 (Cylindrical) P T . ^ £ '8' l8s' ° d' ” luS W dttjrrJfpnnjn THE M°DERN m i u e b - h e p w o r t h l im it e d W W r n m ^ y A . t T i V 11111 11.... CLEANER LEE STREET, OLDHAM, LANCS. VACTRIC LTD^CHAPELHALL, LANARKSHIRE, SCOTLAND 46/T 2/H) October 1 1 ,1 9 4 6 E l e c t r ic a l R e v ie w 4 3

Finally — gentlemen — the building will be lighted throughout by

The British Thomson-Houston Co. Ltd. Crown House, Aldwych, London, W.C.2 4 4 E l ec t r ic a l R ev iew O ctober 11, 1946

W h o TURNED ON THE LIGHT IN THE old dark house ?

Away flew the bogies of old-time lighting Buckingham Palace. From Vienna to when, in 1885, Colonel Crompton started Darjeeling, his influence was felt! The the first electric house-to-house lighting finest memorial to this pioneer of in England. Colonel Crompton, soldier, electricity is the firm of Crompton explorer, engineer, took the boon of Parkinson Limited, which he founded; electric light to darkest Tibet, and down world-famous for electrical equipment, the depths of a coal-mine. He was the whose lamps bum everywhere in honour first to electrify the Law Courts and of one of Britain’s greatest scientific giants

(rom pton l a m p s

TUNGSTEN • FLUORESCENT • DISCHARGE

CROMPTON PARKINSON LIMITED, Electra House, Victoria Embankment, London, W.C.2 Telephone: Temp!Bar 5911 Telemann : Cram park, Jfotrand, Lonio* October 11, 1946 Electrical Review 45

RPI066B

SWITCH TWO-WAY PARALLEL TYPE- ADAPTORS

The Multi-way Switch type Adaptors illustrated represent a wide and comprehensive range of nsulated Electrical Accessories available for essential purposes. 4 6 E l ec t r ic a l R evilw October 1 1 ,1 9 4 6

R.educejyour w

— Instal Power-factor Correction Condensers THE STATIC CON,DENSER CO. LTD. WOKINGHAM, BERKS. Telephone : Wokingham 708 Telegrams : Static, Wokingham

■SlftlllC'OILIITIEr

WATER TURBINE GENERATORS ELECTRIC LIGHTING FITTINGS The Pendants, Wall Brackets, Table Standards, etc. In W ood and W rought Iron of /HACIFAICILANIE Distinctive Designs ENGINEERING CO. LTD. MECHANICAL & ELECTRICAL ENGINEERS KIROLITE (SALES) LTD. Netherlee Road 15 Bury St., London, E.C.3. T el.: A venue 1443 CATHCART, GLASGOW, S.4 October 11,1946 E l ectrica l R eview 47

AT 2 5 0 VOLTS ALTERNATING CURRENT

The mechanism of the “ M UTAC ” silent A.C. switch is a complete breakaway CURVED from orthodox design. Switching is effected CA M FACE through a silent cam-action, operating silver CONTROL SPRING- contacts with a gap of only 'OIS". Housed in a sealed chamber, these contacts are ren­ dered free from dirt, moisture, or interfer­ ence. Outstanding advantages are :— • Silent action. • Long life— designed for 5 amps., tests show a useful life of over 100,000 operations at 100% overload, i.e. 10 amps. (B.S.I299 Parc 1/1946 calls for 15,000 operations at normal rating.)

• Positions of fixing holes and terminals, and size (23-" dia.) are all normal to facilitate Detailed leaflet S9868 available replacement of existing switches. upon request.

\ l a « n v a ä " M UTAC 5UÜITCHE5 iSat&L&&.C. Advt. of The General Electric Co. Ltd.. Magnet House. Kingsway, London, W .C.2 48 E lectrical R eview October 11,1946

czSntfccxiii' nt/uoaiLctna

TOTALLY ENCLOSED * FAN COOLED Fractional HLR Motors

Cogeni October 11, 1946 E lectrical R eview 49

‘WELVIC p vc compost tio os ‘CORVIC polyvinyl cltloritlc ‘ALKATHENE’ polythene

for electrical ap p lica lions

IMPERIAL CHEMICAL INDUSTRIES LIMITED LONDON - S.W. I

P . 227 50 E lectrical R eview October 11,1946

DÀLY Elcictrolyticsb for all ‘Motoii Start’ f e o s cialisation always produces the -testi It is because yALYinanufacture only electrolytic condensers that their world-wide reputation in tlie electrical field stands so high. D A L Y build for all eiectriciil require­ ments and welcomejlilfieult electro­ lytic problems, priding themselves on the fl?xibiliiy of’ their organisation and ability toi'supply special types. N DALY (CONDENSERS) LTD. West Lodge Works, The Green, Ealing, London,^W.5. TYPE NO. P.M. 41/8 Phone : Ealing 4841.

m e a n

S o ]

Electric motor and generator users all over the country can assure themselves of a six-point service covering everything from new plant to reorganisation by writing to The Secretary, ASSOCIATION OF ELECTRICAL MACHINERY TRADERS, Ltd. 11, Argyll Street, Oxford Circus, London, W .I who will send them a list of A.E.M .T. members. October ] l , l 946 Electrical Review 51

H E Lamp-lighter is obsolete—the time-switch- obsolescent. T Substation attendants now have instantaneous, push-button control throughout their areas, including the control of “ off- peak ” loads. Easily installed, highly flexible, reliable and inexpensive, the Standard D .C. Bias system raises efficiency and reduces operating and maintenance costs by an enormous extent in comparison with the older methods of control. D.C. Bias signals cannot be exported to neighbouring under­ takings which are inter-connected by the high-voltage system. Should future regulations prohibit the exporting of signals you will be safe if you have installed D .C. Bias. We shall be glad to send full particulars on request.

S t a n d a r d lU.I&i«»* $vjst«m Standard Telephones and Cables Limited (Remote Control Section) Oakleigh Road, New Southgate, N.ix Telephone : Enterprise 1234 52 E lectrical R eview October 11,1946

Silent Street Corner, Ipswicli

f j A 0 >rctit (Tradition X29v— ■■ ... i.U i ...... " ^ -—

X H E fine example of a Comer Post in

Silent Street, Ipswicli, is a fitting reminder r s 15tK CENTURY tliat tlie same qualities of reliability and CORNER POST

Tke finest and most

craftsmans kip displayed in tkese medieval ancient comer post in Ipswicli. TTiongli

Corner Posts are incorporated today If! soruewkat skorn of

its original keauty,

B U L L Su per Silent aMcotors. T k ese s l»U s ta n d s a t tk e c o r n e r o f “ S i le n t

maclnnes are unsurpassed for tliose situations S t r e e t .”

where silence is imperative.

Y O U C A N ALWAYS RELY ON

I:!»II 03 :TI

BULL MOTORS ( E . R & F TURNER LTD) IPSWICH LONDON-MANCHESTER-BIRMINGHAM NEWCASTLE ■ GLASGOW Electrical Review Managing Editor : October n , 1946 Hugh S. Pocock, M.I.E.E. Technical Editor : Commercial Editor: C. O. Brettelle, M.I.E.E. J. H. Cosens C o n te n ts :— Page Page Editorial.—The All-Electric Idea 557 International Technical Congress . 580 Potters’ Mills . . 559 Commerce and Industry . 581 Views on the News 564 Plug-In Fire Call System. By S. A. Electrical Progress 565 Daines, A.M.I.E.E. . 585 I.E.E. Opening Meeting 566 Intrinsically Safe Apparatus . . 586 Fuel Technologists’ Future . 566 Electricity Supply . 587 Symmetrical Components. By B. J. Lamp Publicity—III . 589 Prigmore, M.A., Graduate I.E.E. 567 Selfridge’s Electrical Exhibition . 590 Correspondence .... 569 Financial Section . 591 Power Generation 570 N ew Patents . 594 Fuel and Power .... 571 Contract information . . 595 Forthcoming Events 572 Personal and Social 573 District Heating .... 576 Classified Advertisements 59 Impregnated Pressure Cable 577 Index to Advertisers 82

EDITORIAL, AD VERTISING & PU BLISH IN G OFFICES : Dorset House, Stamford St., London, S.E.I Telegraphic Address : “ Elecrev, Sedist, London.” Code : ABC. Telephone No. : Waterloo 3333 (50 lines). Registered at G.P.O. as a Newspaper and Canadian Magazine rate of postage. Entered as Second Class Matter at the New York, U.S.A., Post Office. Annual Subscription, post free : Great Britain and elsewhere (except Canada), £2 7s. 8d. ; Canada, £2 3s. 4d Cheques and Postal Orders (on Chief Office, London) to be made payable to ELECTRICAL REVIEW LTD. and crossed ” Lloyds Bank.”

Equip your electrically driven machines with the “ right ” control gear — IGRANIC, which will give positive protection to motor and machine and keep them workingto secure maximum production.

Illustration shows IGRANIC Contactor Panel for control of Travel motion of 6-ton Slab Charger for Steel Mill.

IGRANIC ELECTRIC C?LTP BEDFORD & LONDON 54 E lectrical R eview October 11, 1946

4,000.000 New Houses for Britain

" \ : ------

r V—

Write for illustrated brochure of new wall mounting electric fires by BERRY’S ELECTRIC LTD. L o n d o n ■ Birm ingham ■ M anchester • Edinburgh • Newcastle

MEASUREMENTS These two folders give concise technical data of more than 120 electrical instruments, and form handy reference sheets. Folder 53-x describes D.C. instruments. Folder 54-x describes A.C. instruments. CAMBRIDGE

13 G R0SVEN 0R PLACE, LON DON,S.W.I WORKS : LONDON Electrical Review THE OLDEST ELECTRICAL PAPER - ESTABLISHED 1872

Vol. C X X X IX . No. 3594. O C TO BER II, 1946______9d. W E E K L Y

Sf \ Ilie All-Electric Idea Re-Examination after Thirty-Six Years

HIRTY-SIX years ago a presidential of the ideas enshrined in this vision of the T address was delivered at the Institu­ future that in his presidential address last tion of Electrical Engineers that was a week Mr. Vincent de Ferranti could declaration of faith. Briefly, its theme was examine them in the light of modern that all our wants in the way of light, developments and of his own wide ex­ power and heat would be met by con­ perience as an engineer and reaffirm his verting the coal used in this country into faith in their relevance to what may electricity, provision being made for by­ reasonably be expected. One favourable product recovery. factor is the very much healthier state of The faith thus professed, supported as the electrical manufacturing industry to-day it was by logical reasoning and founded and, as a consequence, the large amount upon scientific and economic principles, it can now put aside for research and for became an inspiration to electrical en­ new methods and machinery. gineers the world over. Its influence was all the greater because the speaker, Dr. Illimitable Scope S. Z. de Ferranti, had so often justified In the task he set himself of estimating his faith through his works and had shown the length of time that is likely to elapse that in willing the end he was able to devise before the coming to maturity of the all­ the m eans. electric age, he was able to trace observable trends, based on a wealth of accumulated Inspiration and Example data, and to show "how almost illimitable This inspiration was in its way probably is the scope for electrification. Whether as potent a factor in electrical progress as the dates tentatively put forward prove was Ferranti’s pioneer work in the long­ closely accurate or no is immaterial. distance transmission of electricity which They may be hastened or retarded by was necessary to give reality to his vision. outside factors. It seems certain, however, Believing that this address constituted a that ever-increasing appreciation by the landmark, we reproduced it in full in this public of the advantages of electricity will journal (as was possible in those days) with lead to more insistent demands for its a view to giving it as wide and as immediate service. a public as possible. Any long-term plans made on behalf of Although the goal still lies ahead and the public that fail to take full account of there are many applications for which this will lead to waste of money and electricity may now seem unsuited, it frustration of popular wishes. They may should be clear from the magnitude of the delay the outcome, but they will not alter progress made since 1910 that any doubts the shape of things to come. The con­ in relation to details of this kind are wisely clusion of our leading article of November qualified by the words “ at present.” 18th, 1910, may here be appropriately It is a measure of the practical quality re-applied; “ Broader views, such as the 558 E lectrical R eview October 11,1946

President has set before us, must be en­ industrialists who need labour, and the couraged and instilled. Mr. Ferranti has Government Departments charged with led the way before ; he leads again and we the task of securing a reasonable spread confidently accept his guidance; we must of employment. This is recognized at look ahead—and go ahead.” Stafford where, it is reported, the Cor­ poration Housing Committee, and repre­ I n time to give per- sentatives of the English Electric Co., the Heat— spective to yesterday’s dis- Ministries of Health, Labour and Supply Electricity cussion at the conference Stations on “ Fuel and the Future ” and the Board of Trade held a conference came the authoritative In­ to discuss the accommodation of 2,000 highly-skilled workers who would be going terim Memorandum on District Heating, to Stafford in the next few years. The reviewed in this issue. This report should result seems to have been a promise by give the quietus to statements regarding the the Board of Trade to do everything extensive use of the system abroad and to possible to facilitate the Corporation’s extravagant hopes of combining it with the production of electricity in large public housing programme. generating stations. No mention is made A r n h e m was a name of back-pressure turbines, the theoretically High known to electrical en- high thermo-dynamic efficiencies of which Voltage gineers befo re it gained its have provided the basis for some of the Cables heroic eminence. It was more extreme claims, presumably because there that a 264-kV im­ an a fo rtio ri case for the more practicable, pregnated pressure cable was laid and though less efficient, pass-out units has not jointed in 1936 to give trouble-free service been established. In certain limited and up to the time of the invasion of Holland. localized fields district heating offers more O f even greater importance, having regard promise, generally when steam is raised to its duty, is the 132-kV cable, also specifically for the purpose. described in this issue, which was put into commission for the Central Electricity T h e growing number of Board during the war. Counterparts of Welding engineers who specialize in these and other cables making up the Research the rapidly expanding field 1,650 miles of 132-kV grid cables installed of welding and the new by B. I. Callenders alone are on view at problems that have continually to be Dorland Hall, W. Technical achievements solved well warranted the attention paid to are at present in advance of bulk require­ these subjects in the presidential address of ments, but when further extensions are Mr. Arthur Dyson to the Institute of needed, the cables will be available. Welding last week. Welding produces more rigid structures than does riveting I n organizations set up for facilitating exchange of and the requirements vary greatly with Designers and Users views between manufac­ conditions. Much research of a funda­ turers and technically mental character will be necessary, as Mr. trained users of electrical apparatus, the Weigel, director of the Welding Research former, it seems to us, gain more directly. Council, U.S.A., pointed out on the same While sales staffs can quite well explain to occasion, with a view to drawing up customers what their principals have to specifications for steel to suit individual types o f structure. offer and why they should restrict their demands, as far as possible, to “ off-the- I t is frequently com- shelf” products, the makers require data “ Mobility ” plained that workers are about actual performance. This implies and Housing reluctant to move from the need to bring users into the closest areas suffering from in­ contact with designers, if only in order dustrial depression to other districts where that the exp en sive p ro p o rtio n o f the work can be found for them. Most factor of safety allowed by the designer people have a dislike of “ being torn up that is sometimes called the “ factor of by the roots ” but this would be more ignorance ” may be minimized. The more easily overcome if they could be assured recondite reasons were given in the chair­ o f proper living accommodation if they man s address of Mr. E. T. Norris to the moved. To satisfy this need is the joint I.E.E. North Western Centre, reported in responsibility of the local authorities, the last w eek ’ s issue. October 11,1946 E lectrical R eview 559 Potters’ Hills Changing Over to Electrical Operation

T^OR thousands of years pottery-making overwhelmingly strong. Apart from the I methods changed scarcely at all; it was question of stoking and maintenance, steam only a century or so ago that the availability plant cannot be switched off or run of steam power introduced the possibilities of economically during slack periods ; it is mechanization on a large scale. Now a new difficult to maintain at constant speed; and phase in the history o f the industry has moreover, it takes up a very considerable arrived—electrification, applied both to pro­ amount of floor space which in the majority viding motive power and to kiln heating. of mills we have visited would form a very The adoption of electrical methods began welcome addition to the production area. several years ago but it is only com paratively Although the basic process is the same in recently that their advantages have com e to be each case, namely the grinding of the flint realized to any very great extent. The war (after calcining) and stone down to approxi­ has helped, by demonstrating the advantages mately 50 to 60 per cent of 0 01 mm. in size, of electricity in the pottery industry, as to-day three distinct methods are employed— elsewhere, to overcome prejudice and con­ pan grinding, cylinder grinding and con­ servatism and conversion to electricity has tinuous grinding. At Stoke-on-Trent also in many cases been eventually brought recently we were given the opportunity of about by the impossibility of repairing or inspecting typical installations of each type replacing obsolescent steam plant as well as by the increased cost o f coal. Probably, however, it is still not sufficiently appre­ ciated in the pottery in­ dustry how uneconomical, expensive and inconvenient it is to continue to em ploy over-age steam plant need­ ing constant maintenance, when electrically driven plant which requires vir­ tually no attention is available. With the present necessity for meeting an unpre­ cedented dem and for pottery both at hom e and abroad, the industry is more than ever anxious to Pan room at Furlong Mills employ up-to-date methods which will enable it to sim plify production, and comparing not only the merits of increase output and reduce costs. In this electrical operation over steam but also the article we propose to confine ourselves to advantages of each method. describing how electricity is being applied Pan grinding, a well-tried method which to the all-important initial stage of pro­ was the accepted practice in the past, is duction, the milling of the flint and stone. still claimed by many of the more con­ This specialist process, which is tending to servative potters to give the most satisfactory become a sub-industry separated from the and consistent results. It has one advantage The® main business of pottery manufacture, does over the other form of batch grinding, cylinder not, unlike later stages of pottery production, grinding, namely that the material has not to [IS I»' require steam. The provision of motive be ground to finality, but it is gradually now power being therefore the sole consideration, being superseded by continuous grinding. the argument in favour of using electricity is The pan grinder consists of a circular steel 560 E lectrical R eview October 11,1946 shell (from 8ft to 14 ft across), paved with for the stator side of the motor, fully inter­ blocks of stone (each weighing about 1 cwt) locked with a liquid starter. The motor and and four arms at right angles driven from a starter are so designed that the motor is central shaft. These arms push round at capable of providing the heavy starting torque 10-15 r.p.m., large roughly hewn pieces of required to start up the plant from rest. stone (known as “ runners ” which weigh A comparison of the relative merits of anything from 18 to 25 cwt each) of similar steam and electricity is admirably demon­ material to the paving. After preliminary strated at the Furlong and Longport Mills of crushing to in., the flint and stone are which Mr. A. H. Riley is manager. At the placed in the pan and water is added, the former a 250-H.P. tandem compound con­ mixture being ground between pan bottom densing steam engine drives a centre cog and runners for a period of from 8 to 12 hours. wheel from which are taken two massive When ground the material is pumped or run shafts 40 to 50 ft long, driving seven pans. into a washing tank and agitated with three or four times its weight of water. After agita­ tion the particles are allowed to settle; the heavier falling to the bottom are returned to the grinding pan

Right : 250-H.P. tandem compound condensing steam engine providing the main drive to the pan mill at Furlong Mills. Below : Two individual electric drives to pans at Longport Mills

When the contemplated conversion to electricity is effected the pans will be individually driven by two 60-H.P. and five 40-H.P. m otors. A p art from the question of maintenance, reliability and lower run­ ning costs, much space will be made available for proposed extension of the plant. At the Longport Mills a 200-H.P. steam engine whilst the finer particles at the top are with­ driving five pans through shafts and worm drawn to storage arks. wheels has already been replaced by five The selection of electrical equipment for separate 40-H.P. electric motors, each fitted the pan grinders requires special care in view with its own power-factor condenser. Situated of the heavy starting torque. Slip-ring motors on the floor below the pans, these motors are essential, and since the drive is usually drive through David Brown gears which through worm gearing from the floor below reduce the speed from 970 to 62-5 r.p.m., the grinding room, motors of the protected gear wheels and pinions further lowering type are found to be suitable. A separate oil- the speed to 11 to 15 r.p.m. immersed circuit breaker is normally provided The pans at this particular mill are used October I I , ) 046 E lectrical R eview 561 solely for flint, which after calcining (firing The charge and pebbles lie in the bottom to a moderately high temperature) and half of the cylinder when at rest, but as soon before grinding is passed through a crusher as the cylinder commences to rotate the driven by a 25-H.P. motor, capable of exerting 1 J times full load torque at starting. Both this motor and the one driving an elevator which conveys the flints to the grinder are of the totally-enclosed type to withstand the extremely dusty atmosphere. In the case of cylinder grind­ ing a cylinder constructed of

Cylinder grinders with V-belt drives and hand-wheel controls for individual clutches at Burslem M ills boiler plate lined with stone blocks turns about a horizontal axis. The flint and stone together with water are fed in through an opening with a hand-cover on the periphery of the cylinder. The grinding medium usually comprises flint pebbles material tends to climb with the cylinder wall which are contained loose in the cylinder until it reaches such an angle that the pebbles with the “ charge ” of material to be ground. cascade and roll upon the stone being The cylinder is provided with ring-gearing crushed. Inching facilities are desirable and driving pinion, the latter in turn usually on the starter to facilitate location of the being driven from the motor by moulded opening in the cylinder accurately over the V-ropes. For this drive a protected-type discharge run-way. Occasionally a friction slip-ring motor capable of exerting at least clutch is fitted to the cylinder driving shaft U times full load torque is necessary for the in which case a protected squirrel-cage motor purpose of overcoming the “ out of balance ” may be employed, equipped with an oil- load when the cylinder is started up. immersed star-delta starter, inching being

OVERFLOW FROM DE-SUMER Continuous or closed* circuit grinding employing a Hardinge mill

DE-SUMER

OVERSIZE RETURN TO MILL FEED

SCOOP FEEDER "" H CE EATO-RA ISE THICKENERAUT FEED' HOPPER CONCRETE SETTLED DISCHARGE ■MATERIAL BED z TROMMEL

k = ' w -^ f=? ! ^ / H ' n i HARDINGE \\\ 1 1 I T OVERSIZE bI m g m g m j|l«L i) p“ ~ } M £ L r ‘ z „ IBM IB |\l - 0IS G^ C ^ (CLEANING) |! || \j ■ ll|______/ 562 E iec trica l R eview October 11. 194h accomplished by manipulating the clutch. by Mr. J. C. Farrant, of the Hardinge Com­ The Burslem Mills axe among those at pany, which was taken over by the Inter­ which cylinder grinding is employed exten­ national Combustion Co., Ltd., in 1921, sively. Here the flints are taken from the so far as the Eastern hemisphere was con­ calcining kiln to crushers by conveyors and cerned. In the succeeding twenty-five years bucket elevators to hoppers from which they several continuous wet grinding plants have can be fed into any of the cylinders by means been installed and at present a considerable of 10-cwt skips. Dust-removal apparatus is number of schemes for change-over from found to be a great pans and cylinders to asset when charging. the Hardinge system is In the newer section in process or under of these mills there are consideration. two sets of four 30- In grinding, the all- cwt cylinders (7 ft in im portant factor is diameter), each set consistency and this being driven through can be most easily V-belts by a 100-H.P., achieved by the better 750-r.p.m. Crompton control possible with Parkinson motor with continuous grinding, clutches for the in­ and classification. This dividual cylinders. method o f grinding has This is an economical other notable advan­ arrangement since each tages. One Hardinge cylinder alone would mill, occupying about require 30 H.P. to the same space as two overcome the heavy Thickener tank with pump, at Dalehall M ills pan grinders, has a starting torque. The larger output than four motors used are of the auto-synchronous pans and it is much more convenient to be type giving power factor control. As a able to withdraw material continuously rather coarse product is required, the rather than wait until 95 per cent has been cylinders are geared to run at 20 r.p.m . ground, as is the case with batch cylinder instead of the usual 18 r.p.m. and the charge grinding. is treated for only nine hours instead of A good indication of the amount of space about twelve. saved by the installation of Hardinge mills The older section of the mills provides a is provided at the Dalehall Mills where two contrast in that a 120-H.P. motor is arranged 10-tons-a-day units (one for flint and one for to drive through countershafting not only stone) have just replaced twelve pans of six cylinders, but also agitators and pumps, varying sizes. Mr. Podmore, the manager of the latter being used to pass the material the mills tells us that output will be con­ over electromagnets to remove stray particles siderably increased when all the necessary of iron. The provision of a power-factor alterations have been com pleted and that correction condenser for the 120-H.P. motor with the removal of an old 350-350 H P. together with suitable adjustments to the compound tandem engine, boiler room, excitation of the auto-synchronous motors coal stock yard and cooling water pond, has secured an over-all power factor of well the area available for productive work has over 0-9; a power-factor indicator is placed been increased by about one-third. More­ in a conspicuous position in the window of over, electric motors totalling 200 H.P. do the substation. To reduce the maximum the same amount of work as the old engine. demand the cylinders are stopped while the A brief description of the Hardinge plant crushing machines are in operation. at the Dalehall Mills will be of particular Continuous or closed-circuit grinding, the interest since it is the most recently installed most up-to-date process, is a development and consequently incorporates all the latest of cylinder grinding which may possibly refinements. Before treatment in the grinder, replace the two other methods referred to the stone or flint (after calcination) is crushed and may be described as the application of in two stages to — f in. and conveyed to a mining practice to the pottery industry. hopper. From the latter, a “ Syntron ” elec­ The continuous grinding plant is the Hardinge trically operated feeder with rheostat controls mill, which was introduced to this country the rate of feed to the Hardinge mill, which October 1 1, 1946 Electrical Review 563 is conical in Shape and is partly filled with revolving arms driven by a 1-H.P. motor at hand-picked flint pebbles of 3^3 in. diameter, the top of the tank assist the material to together with water. The conical design settle and when there is sufficient in the causes a partial segregation of the pebbles tank—a depth of 14 in.—a bell rings. The whereby the largest pebbles at the greatest diameter grind the incoming coarse feed, the discharge cone accelerating the flow of that material which is fine enough to be delivered to the c.lassifier. The grinder motor is a 60-H.P., 735-r.p.m. Metrovick unit which drives the mill through its outer rim via a V-belt, shafts and pinion wheels. The mill discharges continuously through a coarse trommel attached to the discharge spout of the mill, to permit stray oversize or broken pebbles to pass to the classifier. The pulp passing through the trommel is pumped by a “ Vacseal ” (41-H.P. motor) to the classifier which maintains an overflow of finished product corresponding to the required sur­ face factor, the oversize being auto­ matically returned Flint classifier at Dale­ to the mill. The h a ll M il ls finished product overflow of excess Right : Hardinge flint water is returned cylinder show ing to the grinding vibratory feed, return chute from classifier classifier circuit. and main drive, at For assistance in Dalehall Mills. B e lo w : H a rd in g e preparing the stone cylinder showing article we should "Vacseal*’ pump (taking ground m ater­ like to thank Capt. ial to classifier) in T. Lockett, general foreground, at Dale­ h a ll M il ls manager of the Stoke - on - Trent Electricity Depart­ ment; Mr. L. Goodall, his distribution engineer, and Mr. H. McCartney his technical assistant; Mr. A. H. Riley, general manager of the. Furlong and Longport Mills; Mr. T. H. Podmore, manager of the Dalehall Mills, Mr. E. V. Hammersley, manager of the Burslem Mills; and Mr. J. C. Farrant of the International Combustion Co., Ltd. Certain details relating to the electrical equipment of the pan and cylinder grinders were also taken from data in the MetropolUan- Vickers Gazette by Mr. N. A. Smith.

E.R.A. Published Reports An Annotated List of Published Reports (up to October, 1945) of the British Electrical and Allied Industries Research Association has been from the classifier flows by gravity to a issued and can be obtained from the secretary at 15, Savoy Street, W.C.2, price 5s. net. The thickener, a large storage tank, which dis­ new edition contains 112 pages and its contents charges a thickened pulp to the arks. Slowly are classified by subjects. ' Oclo 564 ' Electrical Review October 11, 1946 Views on the Hews Reflections on Current Topics E^EW people can have much idea of the means of what were called “ check,” but «\(b5i thought, time, skill and hard work which are evidently prepayment, meters. The I, go into the making of a film. Last week I went Tribunal directed that the meters should be to the Merton Park Studios where the Film adjusted to lower the charges. In three cases Producers’ Guild is making a “ documentary” the Tribunal ordered that electricity should 1 for the Central Electricity Board which will be supplied to the tenant at the price it cost i*“® be in the nature of a history of the develop­ the landlord. aist®' ment of electricity supply in this country. A * * * control room scene which was being “ shot ” at the time exemplified the harmless deception The practice of sending electricity supply which on the screen looks exactly like the installation and repair personnel to work for S®^10 real thing. Of course the work is closely a few weeks in the factories making the watched by members of the Central Board electrical apparatus they handle is not one site1' staff to guard against gaffes which more which has yet been adopted to any very great -pjooi knowledgeable members of the public would extent. Mr. G. V. Harrap, borough electrical spot. All the same I was impressed by the engineer of Gravesend, is, however, a strong grasp of the technical detail displayed by the advocate of this arrangement, the cost of . chairman of the Guild, Mr. E. P. L. Pelly which, he says, is rapidly recovered by the and members of his staff. The film, which increasing speed and efficiency of the work will run for about an hour, will not be seen resulting from the specialized training. The stef™1 until well into 1947. manufacturers on their part are most helpful '¡He® * * * and welcome the opportunity of ensuring that j s® o there are men who understand their products -¡gdti An apt illustration of the need to avoid the at the consumers’ end. "... use of the term “ high-pressure ” when one means “ high-voltage ” was furnished by Dr. L. G. Brazier’s lecture at the B. I. Callender’s Incidentally, when I visited Mr. Harrap’s Itpaingiii exhibition, which forms a notable addendum office a few days ago I noticed that, instead \k m k to the “ Britain Can Make It ” exhibition of having his fluorescent tubes installed in the (¡m, ; elsewhere. Both pressure (in lb per sq in.) centre o f the ceiling, he had had them fitted and voltage are critical factors in the design above the w indows. H e finds it a definite of cables of large MVA carrying capacity advantage to have both daylight and artificial ^ and any looseness of terminology easily leads light from the same direction. The adoption - x to confusion. It is to be hoped that students of the same arrangement for the showroom iDMm in large numbers have been afforded an windows also greatly facilitates the planning »p a opportunity of gaining from the exhibition of displays which are suitable for day and lit ins an introduction to the physics of high-voltage night presentation. This is especially the case logjdieqmn cable design which have underlain some with the present restrictions on the use of a.. Kïfl eighteen years of research into this aspect electricity for advertising purposes, since the : of electrical transmission. They would same tubes serve both to draw attention to further profit from Mr. D. T. Hollingsworth’s the apparatus displayed and at the same time -“ “P demonstration of the final results in which provide general illumination of the show- î^sapacit joints and sealing ends receive their proper room s. attention. From the overhead-line features * * * (hei on show one receives an obvious reminder Extensions of electricity supply to remote that the word “ tension ” also should be used areas in this country are the subject of debate si ira only in its mechanical sense and not as a here; in Sweden such extensions are taken ssetsofl substitute for “ voltage.” 3 as a matter of course. I hear from a Swedish (5,(00 mi * * * source that it is even proposed to take elec- -r There is nothing new in complaints by tricity to the Lapps, the nomads who roam tenants of flats that their landlords are making the wilds of Northern Scandinavia. Before ' “ excessive profits on the supply of electricity the war telephones were set up in the more i.-®1 to their apartments, but hitherto there seems perm anent L ap p villages. N o w the first to have been no means of curbing this form Lapp katas, tent-like dwellings of a fairly JMi. L of extortion. Now, however, the Rent substantial yet mobile type, are to have ®*n hon Tribunals which have been set up appear to electric light by Christmas when a new h.v. ^on , have power to deal with it. At a recent line in the province of Hàrjedalen will be ^ ’ meeting of the Islington Tribunal tenants put into use. The length of this line is not c. alleged that electricity which cost landlords given but it is to cost £70,000 and at some 3£d. per kWh was being passed on to them points will be 1,000 metres (3,280 ft) above ■lx)0 at anything from 6d. to 9d. per kWh by October 11,1946 E lectrical R eview 565 Electrical Progress Mr. V. Z. de Ferranti’s Time-scale Forecast

N his inaugural address in London on Those trends made it difficult to be satisfied f October 3rd as President of the Institu­ with the suggestions made in the March, 1946, tion of Electrical Engineers, M r . V. Z . d e report of the Fuel and Power Advisory F e r r a n t i recalled that when members first Council. Government Departments should met in their present lecture theatre thirty-six have the best and most enlightened advice, years ago his father (the late Dr. S. Z. de since they would be responsible for large Ferranti) had placed before them a scheme capital commitments in connection with for the complete utilization (in the form of housing and they were in a position to retard electricity) of the energy in all the coal avail­ as well as to accelerate the achievement of able for home consumption. He considered a condition which otherwise would have been that wherever coal and gas were used for the brought about by the public. production of heat and power, everything for If the standard of living was to be raised which they were used would be better done to an extent which would give the mass of when electricity was the medium of the people clean homes, properly heated and application. provided with labour-saving devices and How far had they gone along the road constant hot water, then it followed that marked out for them in 1910 towards the vastly more power must be used by each one “ all-electric ” idea ? It would appear from of them in their factories to enable them to the series of graphs and statistical data produce the great quantity of apparatus to presented by the President that the late Dr. meet the needs of the community. Ferranti’s target figures of coal utilized and saved might be reached within 25 years, Industrial Employment depending upon the labour force available Whatever might be thought of the time for manufacturing the plant required, the scale of the graphs exhibited, it was clear load factor, and the efficiency of conversion that a major development in the use of attained. electricity was taking place in this country It was estimated that 150 million tons of and, in turn, occupying a great labour force coal would be needed for generating electricity in making the necessary equipment. In in 1986, compared with the present 25 million April, 1946, there were 236,000 employed on tons per annum, representing 405,000 million manufacturing apparatus, 152,000 in electrical kWh at an efficiency of 30 per cent, which engineering and 64,000 on making instru­ would require 96 million kW of plant operat­ ments, being 74,000 more than in 1939 and ing at never more than 60 per cent load 81,000 fewer than in 1945 when the industry factor. The present total of 12 million kW was heavily involved in the production of of installed plant (with insufficient 12 per cent warlike stores. spare capacity) generated 38,000 million kWh. While the increasing efficiency of converting coal into electricity was very important, an Over 9,000 kWh per Head even greater necessity was reduction of the The energy sold to consumers since 1920 capital cost of the equipment of utilization. had been remarkably regular, indicating At the moment the cost of fuel was nearly targets of 131,400 million kWh in 1959 and of one-half the total cost of production, but it 405.000 million kWh in 1986. Those totals would fall back to one-quarter, either by the meant respective yearly consumptions of addition of new equipment at the present 2,850 and 9,(00 kWh per head of the value of money, or by the return of money to population. its previous purchasing power. It was there­ The smaller figure seemed very moderate fore of major importance to reduce the cost to Mr. Ferranti, who for many years in his of equipment by improved design, greater own home had been using 6,000 kWh per turnover of one design in one factory, long person per annum. If that rate of use life to reduce depreciation (balanced against became general, and he did not consider it obsolescence due to improved design) and by any means an extravagant rate, then low interest rates. 270.000 million kWh would be required The electrical manufacturing industry could yearly for domestic uses alone. fairly clairn to be a good employer in every 566 E lectrical R eview October 11,1946

sense of that term. It behoved members of vote of thanks, for an historic address, said it the I.E.E. to do all in their power to promote was good to see that at last we were turning to the orderly conduct of industry and to dis­ the future, away from war, and were trying to courage those who took a narrow view of predict what we might come to as time went on. Sir H arry Railing proposed a vote o f thanks their responsibilities. to the retiring President. He said that for many years Dr. Dunsheath had done outstanding Opening Meeting work in connection with research, industry and AAEFORE the delivery of the presidential education. He had been President for the first address, Dr. P. Dunsheath, the retiring post-war year and therefore had been given the President, said that the Council had decided to task of leading through that first year a com­ introduce a brief ceremony of welcome for new munity of 30,000 members. In all the Institu­ corporate members, and whilst welcoming them tion’s multifarious activities Dr. Dunsheath had to call attention to the member’s obligation to his shown himself to be an able leader, and during colleagues in the profession and the community. his visits abroad he had proved himself to be an The President welcomed the first members excellent ambassador. admitted under this procedure. The premiums Mr. Percy Good, who seconded, agreed that awarded for papers read during last session during the past year there had been a masterly were then presented. co-ordination of all the Institution’s activities Introducing his successor, Dr. Dunsheath said under the guidance of Dr. Dunsheath. that Mr. Ferranti was well known to members The vote of thanks was cordially given, and for his many activities both inside and outside the retiring President’s certificate was handed the Institution. He had a great reputation as to Dr. Dunsheath by the President. Dr. an industrial leader and at all times had shown Dunsheath, acknowledging the vote of thanks, himself interested in every possible way in the said that, as he had anticipated, his year of activities of the Institution. office had been a full one. The first post-war Mr. F e r r a n t i then delivered his address and year o f an Institution such as this must afterwards Sir Johnstone W right, proposing necessarily be occupied in making up many of a vote of thanks, said that this was a very the arrears of the previous five or six years and historic occasion, for it was the first time in he felt gratified that it was his good luck to be the history of the Institution that son had elected at that time. There had, of course, been followed father as President. Mr. Ferranti’s many post-war problems and many difficulties to father was President in 1910, and they all knew face but, on the other hand, there had been, how much he had done for the Institution. many compensations, and he had greatly P r o f e s s o r E. B. M o u l l i n , seconding the enjoyed his year of office. Fuel Technologists’ Future ADDRESSING the North Western Fuel Ministry to which the industry was attached J-™- Luncheon Club on the subject of “ Fuel and then beyond them would be the Minister. Technologists and Nationalization ” in Man­ So that the fuel technologists who to-day looked chester on October 2nd, Sir John Dalton said towards a board or committee would have four that he thought it might be salutary if, for a sets of bosses instead of one. change from the high-level discussions in which After pointing to the strong trade union fuel technologists usually found themselves, representation on new Government-appointed they were to consider what might be the effect bodies, Sir John said it had been stated in of a new political regime on themselves, their Parliament that the men who would control families and their homes. He referred par­ the vast nationalized industries would be paid ticularly to the nationalization proposals on a commercial scale and not on a Treasury affecting the coal, gas and electricity industries. scale. He understood that the salary of a He was not concerned with the rights or wrongs member of the National Coal Board was £5,000 of the major policy of the present Government a year because it could not be higher than that of nationalization. His own industry (elec­ of a Cabinet Minister. Sir John drew the tricity supply) had done extraordinarily well inference that the Treasury had indeed had a during the war, and had been thanked by the say even in the pay for these top jobs and he Government. Yet, only ten days earlier, Mr. felt that it was going to have much more say in Herbert Morrison had stated that what the the grades and salaries of the great number of industry needed was good engineers and good experienced and professional men who, willy commercial men. nilly, would be embraced in these nationalized If the fuel industries were nationalized, industries. Owing to the great weight of expert boards of directors and municipal gas and service which the Government had already got electricity committees would disappear and for on the cheap,’ it was not going to be easy for them would be substituted regional boards and personnel of new nationalized industries to then a National Board. These boards would establish themselves on a higher level than have their masters, the civil servants of the obtained in the State offices at the moment. October 11,1946 E lectrical. R eview 567 Symmetrical Components A Graphical Introduction

HE conceptions necessary for the treat­ By B. J. Prigmore, m .a ., G ra d u a te i .e .e . T ment of balanced three-phase systems are well known. The treatment of un­ It may thus reasonably be supposed that balanced three-phase systems may often be any unbalanced system can be synthesized, as the above, by giving different values to the balanced positive and negative star impedances, and, conversely, that any un­ balanced system can be resolved into those components from which it could be syn­ thesized. The resolution of a system which sums to zero, as the currents in a three-wire star, may be performed by retarding one of its vectors by 60 deg and adding it to its successor in the sequence. Thus, if Ix be turned clockwise through 60 deg its components ap and an will also be turned clockwise through 60 deg. This will result in an being opposite to bn, and ap being 60 deg closer to bp. If, now, Ix, retarded thus, be added to Iy, then the negative sequence components an and bn will be cancelled, leaving a resultant due only to the equal positive sequence components ap and bP. Since these are now at 120 deg to each other, the resultant is -\/3 times either. Thus, l/-\/3 times the resultant of simplified by their resolution into two one of the unbalanced vectors retarded balanced systems of opposite phase sequence. 60 deg and added to its successor gives a The synthesis of an unbalanced system positive sequence component in magnitude, from two balanced systems of opposite phase but 30 deg retarded in direction. These sequence is demonstrated in Fig. 1. In this, operations are shown in Fig. 3. If a vector the currents in the balanced star aP, bp, Cp be advanced 60 deg and added to its suc­ are in positive phase sequence, a b c, lagging somewhat on the phase supply voltage. The currents in the balanced star an bn cn are in negative phase sequence, c b a, in phase with their phase supply voltage. Their vectors are shown in Fig. 2. The un­ balanced system of currents in x, y and z is obtained by adding the negative to the positive sequence currents using the 1 : 1 current trans­ formers as shown. The resultant currents cessor, the positive sequence components I*, Iy and L, obtained by adding aP to an, will be cancelled, leaving a resultant of \/3 etc., are also shown in Fig. 2; they form an times the negative component, which is unbalanced system. 30 deg retarded in direction. 568 E lectrical R eview October 11,1946

The extension of this method of resolution to an unbalanced system which does not sum to zero (such as a four-wire three-phase current system) is now relatively easy. An unbalanced four-wire current system which does not sum to zero may be regarded as the sum of an unbalanced system which does sum to zero and a “ residue,” which residue represents the current in the neutral con­ ductor. This neutral current may be regarded as the sum of three equal line currents, giving, in effect, a single-phase system with three parallel phase conductors and one neutral conductor, as in Fig. 4. These line currents are the “ zero-sequence ” components and

are each equal to \ of the residue. The F ig . 4 residue being subtracted from the original unbalanced system, the remaining system, the positive sequence components will be which sums to zero, may then be resolved seen to sum to zero. into its positive and negative sequence The negative sequence component an is components. obtained by retarding Iy by 120 deg and h An unbalanced system with a residue, of by 240 deg, adding these to I*, and taking } of the resultant. The correctness of this is seen by performing similar operations on the corresponding components, when all but those of the negative sequence will be found to sum to zero. Some comparison may be made between the positive, negative and zero sequence components of an unsymmetrical three- phase system which does not sum to zero, and the positive, negative and stationary rotational components into which may be resolved a pulsating magnetic field varying sinusoidally about its mean. Although hitherto a vectorial view of the analysis has been retained, the above vector which an example is given in Fig. 5, may be operations may all be performed by complex resolved as follows. The zero sequence algebra, when the conventional symmetrical component is the resultant of the vectors component formulae would be obtained. Ix, Iy and Iz. The correctness of this is seen Short Bibliography by considering the sums of the positive and Stubbings, G. W .: “ Elements of Symmetrical negative sequence components which are Component Theory.” Dover, A. T .: “ The Theory and Practice of zero; only the zero sequence components have Alternating Currents.” a sum. The positive sequence com ponent aP is found by advanc­ ing I y by 120 deg, I z by 240 deg, adding these to Ix, and taking ^ of the resultant. If these operations are done on the compon­ ents of Iy and I*, and these are added to the corresponding com­ ponents of Ix, all but October 11, 1946 E lectrical R eview 569 CORRESPONDENCE Letters should bear the writers' names and addresses, not necessarily for publication. Responsibility cannot be accepted for correspondents' opinions.

“ Pluto ” Relics I do not pay my electricity accounts un­ TkU RIN G the war a full scale trial opera- willingly as obviously nothing can replace electricity satisfactorily for domestic use. I tion of “ Pluto ” took place between Swansea and the Devon coast and a length do, however, see lack of uniformity in charges, and cannot understand why so many supply o f about 200 yd is still lying on the beach at authorities should be “ out of step.” Watermouth Bay, some four miles west of Glasgow. Alex. M ilne, Senr. Ilfracombe. I would suggest that as a memento of the achievement pieces could be Defective Wiring prepared as paper weights, ashtrays, etc., for sale to engineers associated with the cable J k FTER a lull, produced I think largely industry and others. The proceeds from by my insistence that the contractors such a sale could be passed on to the E.I.B.A. have themselves to blame for “ unsafe or the I.E.E. “ Home ” Fund. installations,” Mr. Milne has been “ shocked” J a s . D. F in d lay , a.m .i.e.e., M.inst.F. into declaring under the above new title that Birmingham. he “ cannot understand the attitude of those responsible.” Neither can I ! The problem The Time Factor is capable of solution only if the contractors ^kN E frequently encounters in technical assume their proper responsibilities and articles and even in British Standard refuse to accept the verdict of “ the powers Specifications reference to the R.M .S. value at that be ” (whoever they are). a given instant of varying alternating current. I do not think that either the Wiring Rules This is quite indefensible, as any quantity Committee of the I.E.E. or the supply given as a R.M .S. value implicitly includes a authorities are of the opinion “ that there is period of time. no need for any special action in this matter,” I must admit that I have been unable to and it follows that the charge of apathy can think of a concise alternative expression to only be laid at the contractors’ own doors. which exception cannot be taken, but this of My previous argument that the contractors course does not render justifiable the one to alone are responsible apparently proved so which I refer. unanswerable that the recent correspondence Birmingham. H. C. Fox. lapsed. It only remains now to see what action they are prepared to take, with com­ Electricity Charges plete approval and full co-operation from rBtHE figures given in your issue of Septem- the supply people. ber 27th relating to “ all-electric ” Sheffield. D . H. B r a i d . temporary houses are interesting. The average cost of electricity in an “ all-electric ” “ Engineers ” temporary house is given as 2s. lOd. per week 11[H E N will something be done to prevent and as 1 pay 8s. 6d. per week for similar the use of the description “ engineer ” conveniences I am prompted to raise the point by all and sundry ? While there may be of electricity charges in general. One can difficulty in getting its use made illegal by the understand that in rural areas costs must unqualified, little if anything appears to be necessarily be high and indeed sometimes so done to discourage the indiscriminate use of high that the unfortunate inhabitants are the word. We still see headlines announcing prohibited from using electricity for anything that thousands of engineers threaten to strike other than lighting. for an increase of wages. When building I have, however, never been able to under­ trade operatives propose to cease work for stand why costs should vary so much in higher wages they are not described as towns and large cities—and they do vary “ architects.” considerably. I get my supply from the Have the professional engineers’ institu­ Clyde Valley Electrical Co., but if I could tions made any joint appeal to the lay press transport my house 800 yards I would be on this subject ? If not, it should be tried. able to enjoy a cheaper rate from the Glasgow First, however, we ought to put our own Corporation Electricity Department. house in order. A number of electricity Ct 570 E lectrical R eview October 11,1946

supply undertakings, who ought to know The present unsatisfactory state of affairs better, have of late, for example, given the should be “ cleaned up ” as it brings the title title “ consumers’ engineer” to people who could “ engineer ” into disrepute. This is particu­ not by any stretch of imagination be regarded larly so in the case of the real engineer who as engineers, and are doing work which does has been so unfortunate as to let himself not entail any engineering knowledge. In acquire the title of consumers’ engineer, this connection your personal column of which in many cases is a “ dead end ” job; September 27th indicates that a lady demon­ although in many undertakings it rightly strator, well qualified as such, but certainly carries the responsibility under the manage­ not a trained engineer, took over the duties, ment of the whole of the commercial develop­ during the w ar, o f the consum ers’ engineer for ment side, necessitating both engineering and one of the largest London undertakings. commercial knowledge. The proper title for The consumers’ engineer’s job in many under­ the position (more used by manufacturers takings necessitates his being a trained but adopted by a few electricity undertakings) engineer and rightly so if the position carries is, of course, “ commercial engineer.” that title. S in e D u b io . Power Generation W estern Centre Chairman’s Address

S IO M E aspects of electricity generation were United Kingdom had risen from 215d. to 458d. ^ commented upon by Mr. R. W. B i l e s per ton in 1945 whereas in the United States the (Central Electricity Board, S.W . England Area) rise had been from 103d. to about 150d. per ton. in his address this week in Bristol as chairman C oal price increases since 1935 had discriminated of the Western Centre of the Institution of severely against power stations. Electrical Engineers. Mr. Biles began with a Owing to intermittent output, the River brief explanation of plant-loading programmes Severn barrage proposal would not wholly and load dispatching on the grid system, replace steam generating plant. Mr. Biles remarking that under normal conditions the suggested that the £47 million, the estimated permissible frequency variation was ± 0 1 cycle cost of that hydro-electric scheme, might with and that of system time ± 5 seconds. advantage be spent on intensive research to The capacity at the end of 1945, with 142 improve the overall thermal performance of selected stations interconnected in parallel, steam generating plant. totalled 11-3 million kW. Customary day-to- It was not by any means certain that any day analysis of performance showed that at major increase of plant capacity would be present average breakdowns of plant caused a needed to permit electric domestic heating to continuous loss of about 7-5 per cent of the be substituted for direct fuel consumption. total capacity, overhaul 2-5 to 5 per cent in Such plant increase would not be uneconomic, winter and 30 per cent in mid-summer, bad fuel provided electric heating only was used in the about 5 per cent and other causes another 5 household. Mr. Biles contended that electric p e r ce n t. heating to-day in the larger towns did not cost Staff technical conferences on generation, any more on the average than heating by direct initiated in the S.W . England and S. W ales area, fuel consumption. started in 1940 and were now held twice yearly in all grid areas. Annual calculations involved in what were known as “ Section 13 ” negotia­ tions were yearly becoming more complicated Society of Inventors and difficult; all parties would welcome some A T a meeting of the Midland Branch of the better alternative. ” Society held in the Chamber of Commerce, It would now appear to be possible to use New Street, Birmingham, a good deal of in­ voltages not exceeding 132 kV for transmitting formation of interest to inventors was made energy to certain parts of Great Britain at a available. The position regarding Licences of lower cost than that of transporting coal by rail Right was discussed, and the Society’s suggestion to those areas. During the war fuel consum ption that certain inventions should become State in the United Kingdom stations rose to between patents under the custody of the Comptroller 1 -39 and 1 -42 lb per kW h generated whereas received considerable support from members. that of United States stations fell to between The winter programme of the Society is now 1-31 and 1-35 lb per kW h. The average revenue well under way. For the present meetings are from 1939 to the present time had risen in the held on the fourth Thursday of the month, United Kingdom from 101 to l-07d. per kW h starting at 7 o’clock. Intending members sold, whereas in the United States it had fallen should communicate with the secretary of the from 108 to 0-82d. per kWh sold. During branch, Mr. B. T. Clark, 244, Stoney Lane, the same period the price of coal in the Birmingham, 25. October 11,1946 E lectrical R eview 571 Fuel and Power Ministry’s Statistical Digest for 1945

A T H E R long after the close of the year the per annum class. These 38 stations produced U 1 Ministry of Fuel and Power has issued its 31-54 per cent of the total power. Fifteen Statistical Digest for 1945 (Cm d. 6920, Stationery stations of the 500-1,000 million kW h class Office, 2s.). For our readers the principal accounted for 27-91 per cent of the total energy interest lies in the information relating to the and six with outputs of over 1,000 million kW h supply of electricity during the past eight years for 23-75 per cent of the total. The largest embodied in thirteen of the tables (Nos. 66 to percentage of stations (12-43) was the under 78). This is a forerunner of the Electricity 50,000 kW h class; these 43 stations generated Commissioners’ “ Return of Engineering and only 780 million kWh. Different grouping is Financial Statistics ” and “ Generation of employed (Table 68) to show the sales of Electricity in Great Britain ” which are shortly energy. About 42 per cent of the total was to be made available again and will cover the sold by 23 undertakings (14 com panies) disposing w a r y e a rs. of more than 300 million kW h per annum. The first of the tables (No. 66) relates to the It is seen from Table 70 that the capacity of generation of electricity by authorized under­ generating plant installed at the end of the takers and transport authorities— 375 public year rose from 9,368 M W in 1938 to 12,297 authorities (against 378 in 1938) and 195 com ­ M W in 1945; the aggregate of individual panies (213). The output is analysed according maximum loads from 8,041 M W to 10,660 M W ; to the type of prime mover employed. O f the and the load factor from 34-6 to 39-9 per cent total of 38,611 million kW h in 1945 (25,708 (it was 42'1 per cent in 1942). million in 1938) steam plant produced 37,373 An estimated analysis of sales in millions of million (24,546 million). W ater power accounted kW h by type of consumer given in Table 71, for 1,144 million (988 million), oil and gas shows the following rises and falls: Domestic engines for 46 m illion (60 m illion) and destructor and farm premises from 5,360 in 1938 to 8,848 and waste-heat plant, etc., for 48 m illion (114 in 1945; shops, offices and other commercial m illio n ) . premises from 3,114 to 3,497; factories and Public supply authorities accounted for. other industrial premises from 10,311 to 17,692 20,702 m illion kW h (13,143 in 1938) and com ­ (20,524 in 1943); public lighting (decrease) from panies for 16,582 million (11,229 million). 367 to 142; traction (decrease) from 1,249 to Transport undertakings generated the balance 1,220; total from 20,401 to 31,399. The 1945 (1,327 million, against 1,336 million). figures are subject to revision. In producing this energy 23-5 m illion tons of Three tables (Nos. 72-74) set out financial coal was used as compared with 14-9 million results, giving sales of electricity by various tons in 1938; coke and coal breeze was used classes, the revenue from each class and the to the extent of 0-3 m illion tons (0-2 m illion); average revenue per kW h for all authorized and oil consumption was 20 million tons, the undertakings (including the Central Electricity same as in 1938. Board), public authorities (excluding the Table 78 gives an idea (though not a complete Board) and companies. The following table is one) of the extent of private generation by compiled from the figures given:—

S a l e s a n d A v e r a g e R e v e n u e p e r k W h i n 1 9 4 4 -4 5

All undertakings Public authorities Comp anies Class of load Million Average Million Average Million Average kWh revenue, kWh revenue kWh revenue t pence pence pence

Lighting, heating and cooking 11,223 1-588 7,664 1-386 3,560 1-927 Power 20,044 0-803 10,837 0-792 9,207 0-815 Public lighting 35 2-462 30 2-107 4 4-956 Traction 1,171 0-807 527 0-908 464 0-729 Totals 32,473 1-066 19,058 1-036 13,235 1-112 industry. O f the total of 5,938 million kWh, Table 75 gives, in total, capital expenditure of coal mines are credited with 1,555 million, all authorized undertakings (including the Central chemical and allied trades with 1,442 million Board), revenue, expenses, surplus and appro­ and the iron and steel industries (excluding priation. The following are salient points;— electricity generated at coke ovens) with 1,120 Total capital expenditure rose from £648-47 m illio n . million in 1938-39 to £746-46 m illion in 1942- Table 67 shows that the 10-98 per cent of 43, the total revenue from £98-62 to £134-55 the stations were in the 200-500 million kW h million and the gross surplus from £47-58 to 572 E lectrical R eview October 11,1946

£55-44 million. While other items of appro­ Table 69 shows a considerable decrease in priation remained fairly steady, income tax the number of persons employed by authorized increased from £1-59 to £5-84 million. Fuel undertakings— from 120,731 (7,111 females) at costs rose from £14-83 to £3511 million due M arch 31st, 1939, to 89.,944 (14,182 females) at largely to an increase in the price of coal and January 1st, 1944. These figures exclude coke (including handling) from 20s. 4d. to Central Board employees. 33s. 6d. per ton. Salaries and wages went up Among the many tables dealing with the from £2-27 to £3-42 million and repairs and production and distribution of coal is one maintenance, oil, water and stores from £2-44 (No. 90) showing the amounts of coal of to £4-25 million. These working expenses various grades and from various regions exclude am ounts attributed to generation under supplied to electricity undertakings in 1945. the directions of the C.E.B. The increase in The total is given as 22-8 m illion tons of which local rates was very moderate— from £7-21 to 13-7 m illion tons was dry slacks and smalls and £8-55 million. 4-9 million tons washed slacks and smalls. In the case of public authority undertakings, Only 2-1 million tons of graded coal was excluding the Central Board (Table 76) capital s u p p lie d . expenditure increased from £351-15 m illion in According to Table 27 the proportion of 1938-39 to £400-38 m illion in 1942—43. Gross mines at which coal-cutting machines were in surplus rose from £24-24 to £25-05" million; use rose from 50 per cent in 1938 to 59 per cent generation expenses from £0-91 to £1-04 in 1945. O f the total number of machines— m illion; interest charges from £6-93 to £7-16 7,729 in 1938 and 8,292 in 1945— 5,106 and m illion; loan repayments, etc., from £11-60 to 5,926 respectively were electrically operated. £13-24 m illion; and income tax from £1-25 to £2-55 million. Net contributions to rate relief Later Statistics fell from £0-64 to £0-08 million. According to the September Monthly Digest The total capital expenditure of company of Statistics, the total am ount of energy generated undertakings (Table 77) increased from £240-54 by authorized undertakings and transport m illion in 1938 to £281-04 m illion m 1942 and authorities during the. first eight m onths of this the total capital from £183-36 to £191-34 year was 26,092 million kW h. The coal con­ million. The gross surplus rose from £20-47 sumption of these authorities was about 16-4 to £26-01 million. The total paid out in interest million tons. The weekly average total coal and dividends declined from £11-08 to £11-07 stocks in August amounted to 1-8 million tons m illion and generation expenses from £0-95 to .as compared with 3-0 million tons in August £0-65 m illion. la s t y e a r .

Forthcoming Events Monday, October 14th.— L o n d o n . — A t t h e Technical College, Acton, W.3, 7.30 p.m. Institution of Electrical Engineers, 5 .3 0 p . m . Institute of W elding (North London Branch). Institute of Transport. Inaugural address by “ Development of the M odem Electrode,” by the President, R. Stuart Pilcher, “ Road Pas­ Dr. J. H. Paterson. senger Transport.” Thursday, October 17th.— L o n d o n . — I n s t it u ­ M anchester. — Milton Hall, Deansgate, 7 tion of Electrical Engineers, 5.30 p.m. I.E.E. p.m. Institution of Heating and Ventilating Installations Section. Inaugural address by the Engineers (Manchester and District Branch). chairman, J. F. Shipley. “ District Heating,” by L. C. Grant. Birmingham. — Imperial Hotel, 6.30 p.m. St. Albans. — Peahen Hotel, 3 .3 0 p . m . Institution of Heating and Ventilating Engineers Association of Supervising Electrical Engineers (Birmingham and District Branch). " Trends (St. Albans Branch). “Fractional H.P. M otors,” of American Heating Practice,” by G. Napier by A. N. D. Kerr. Adlam. To be read by R. E. Otter. New castle-on-Tyne. — Neville Hall, West- gate Road, 6 .1 5 p.m. I.E.E. North Eastern Friday, October 18th.— New castle-on-Tyne. Centre. Chairman’s address by T. M. Ayres. — Lecture Theatre, King’s College, 6.30 p.m. Tuesday, October 15th.— L o n d o n . —L.C.C. I.E.E. (North Eastern Students' Section). South-East London Technical Institute, 8 p.m. Reactance and the Performance of Barrel Electrical Engineering Society. “ Sir Am brose Rotor Alternators,” by J. G. Henderson. Fleming. His Life, and Professional W ork,” Monday, October 21st.— L o n d o n . — A t th e by Prof. MacGregor Morris. Institution of Electrical Engineers, 7 p .m . M anchester. — Engineers’ Club, Albert I.E.E. London Students’ Section. Chairman’s Square, 6 p.m. I.E.E. North Western Centre. address, “ The Power Transformer,” by R. V. “ The Control of Electrical Installation,” by D a r t o n . W. R. Watson. Birmingham.— Grand Hotel, 6 p.m. I.E.E. D e r b y . — I.E.E. East Midland Sub-Centre. South M idland Centre. Chairm an’s address by “ Three-Phase Distribution and Electric W elding Ç,' £• Pailridge. Short address by the President, and Furnace Loads,” by A. Langley Morris. V. Z. de Ferrtmti. Wednesday, October 16th.— L o n d o n . — I n s t i ­ T uesday, O c t o b e r 22 n d .— L e e d s . — Corporation tution of Electrical Engineers, 5 .3 0 p.m. I.E.E. Electricity Department, W hitehall Road, 6 p.m. Transmission Section. Inaugural address by LE.E. North Midland Centre (Installations the chairman, J. Andrew Lee. Group). Inaugural address by J. G. Craven. October 11, 1946 E lectrical R eview 573 PERSONAL and SOCIAL News of Men and Women of the Industry

7BA H E appointment is announced of Mr. S. E. Southern announced that the fifth annual G oodall as chief engineer of W. T. branch party would be held at the Embassy Henley’s Telegraph Works Co., Ltd., in Rooms, Welling, Kent, on January 25th. succession to Dr. P. Dunsheath, O.B.E., M.A., Applications for tickets should be made to who, as we recently reported, has relinquished him at 16, Chastillian Road, Dartford, Kent. his appointment as chief engineer and On September 30th presentations were made becomes consulting engineer to the com­ to Mr. E. C. Williams, assistant accountant of pany. Mr. Goodall has been deputy chief the Shropshire, W orcestershire and Staffordshire engineer since July, 1945. He joined the Electric Power Co., on his retirement after fifty company in January, years’ service. A cheque from the com pany was 1944, having previously presented by Mr. D. H. Kendon, general served in the Research manager, who expressed his appreciation and Department of the that of the directors of M r. W illiam s’ valuable Metropolitan - Vickers service. Gifts from the staff of a silver cigarette Electrical Co. M r. case and a silver lighter were presented by M r. Goodall received his A. B. Hodson, chief accountant. professional education at Queen Mary College, M r. E. W . Abbott has retired from the technical University of London, staff of the Leeds branch of the Crompton and holds the degree of Parkinson organization after fifty-five years’ M.Sc.(Eng.). He is service. Mr. Abbott, who joined Crompton & a member of the Co. in 1891, was due to retire in 1939, but with Institution of Electrical the outbreak of war he volunteered to carry on with his duties. Mr. E. J. Arnold, for many Engineers and has Mr. S. E. Goodall served on the Council years Leeds branch manager of the supplies (1941-44), and he is also m e m b e r o f division of Crompton Parkinson, Ltd., is also several I.E.E. Committees. retiring at the end of the year. He will be Mr. A. D. Culling, who joined the Sun Electrical succeeded by Mr. J. Sewell, recently returned from the forces, who took up his duties with Co., Ltd., in 1925 as a technical sales engineer, the branch on October 1st. Before entering the has recently obtained his release from the army in 1941, Mr. Sewell was manager of Ministry' of Supply after serving in various Crom pton Parkinson’s Liverpool branch, after technical and administrative capacities during having spent many years with them in London. the war years, and has now returned to the company as manager of the Motor and Plant Mr. J. Robertson Finniecome, M .Eng. (Zurich), Department at the head office. For four years M.Inst.C.E., M.I.Mech.E., has been appointed Mr. Culling was the Ministry of Supply repre­ chief technical engineer to Daniel Adam son & sentative on the l.E.E. W iring Regulations C o . , L t d . C o m m it t e e . Mr. F. Hopps, telephone manager in the Mr. R . W . D evereux, deputy electrical engineer Middlesbrough area, has taken up his new and manager at Ealing, was recently presented duties as telephone manager in the Newcastle- with a fitted writing case by the staff and em­ on-Tyne area in succession to Mr. A. E. Ryland. ployees of the Electricity Departm ent on leaving Mr. C. F. Hatton, mains engineer with the to take up the position of engineer and manager Bolton Corporation Electricity Department, has of the Ulverston, Lancs, Electricity Depart­ retired after forty years’ service. ment- The presentation was made by Mr. R. Birt, the borough electrical engineer. Mr. J. C. Fairchild, electrical engineer and transport manager to Lytham St. Anne's Town The South Eastern Branch of the Association Council, has reached the retiring age but his of Supervising Electrical Engineers held its period of service has been extended until annual theatre visit on September 28th, arranged August 31st, 1947. A s he desired to relinquish by the social section under the leadership of the the duties of transport manager, Mr. Wm. secretary, Mr. J. Southern, when a visit was paid Ashton has been appointed to the position. to the London Palladium to see “ High Time.” About fifty members formed the party, which A dance was held at the Berkeley Rooms, included Mr. A. Brammer, general secretary of Bristol, on October 4th, by the Bristol Electric the Association. After the show supper was Club, in co-operation with the Bristol Branch of taken at Franks Restaurant, Jermyn Street, at the Electrical Association for Women, the which Mr. A. D. Culling (branch chairman) proceeds being in aid of the Electrical Industries welcomed the guests and thanked the social Benevolent Association. Over 200 people committee for an enjoyable evening. Mr. attended and among those present were Mr. 574 E lectrical R eview October 11, 1946

Walter Riggs, president of the E.I.B.A., Mr. O b itu ary H. S. Fothergiil, the secretary of the Association, and Mr. C. L. Fuller, chairman of the Bristol Mr. A. E. L. Chorlton.— W e learn with regret Electric Club. A number of prizes, including of the death of M r. Alan Ernest Leofric Chorlton electric fires, toasters, irons and kettles, were who, until last year, was chairm an of Lancashire distributed during the evening. Mr. W. C. Dynamo & Crypto, Ltd. Mr. Chorlton was Bowler acted as M.C. born in 1874 at Audenshaw, Lancs, and was educated at the Manchester College of Tech­ Mr. J. R. Keir and Mr. W. E. Hillyard, for nology and Victoria University. Fie was with m any years members of the editorial staff of the Mather & Platt, Ltd., for twenty-two years Electrical Times, recently retired. Both are beginning as an apprentice and subsequently very well know n in the electrical industry. becoming a director. From 1913 to 1918 he Mr. W . J. Jefferson, consumers’ engineer and was with Ruston & Proctor, Ltd., and then, mains superintendent with the Chesterfield until 1929, with Wm. Beardmore & Co., Ltd. Corporation Electricity Department since June, Apart from his connection with Lancashire 1944, has been appointed deputy electrical Dynamo, Mr. Chorlton had been a director of engineer and manager to Leyton Borough Trinidad Leaseholds, Ltd., Smethwick Forgings, Council, Essex. He takes up his new post at and other companies. He was a Member of the beginning of November. Parliam ent for fourteen years, first for Platting Lt. Col. S. E. Monkhouse was welcomed as and then for Bury; he was a member of the a member of the N.E.S.C.O.E. Association on three leading engineering institutions. Mr. his retirement from the m anaging directorship Chorlton was awarded the C.B.E. in 1917 for of the North-Eastern Electric Supply Co. at his services during the 1914-18 war. a dinner held at Newcastle-on-Tyne on October Mr. F. Viner.— It is with regret that we have 2nd. In the absence of the president of the to announce the sudden death of Mr. Frank Association, Mr. R. P. Sloan, the chair was Viner, of the Publicity Department of the taken by Mr. J. R. Beard. A tribute paid by British Thom son-Houston Co., Ltd., while on the chairman to Col. Monkhouse was supported holiday in Devon. Mr. Viner, who had been by Mr. G. E. Moore, who spoke of the great forty years with the company, was born in assistance he had given to Whitleyism. Col. London in 1880 and educated at Merchant Monkhouse responded with his usual vigour. Taylor’s School and Finsbury Technical College The hon. secretary, Mr. W. G. Bass, thanked under Professor Silvanus P. Thompson. He Mr. L. E. M old for m aking local arrangements received workshop training at the Sandycroft for the function, the idea of which, the chairm an Foundry Co. and Engine W orks, near Chester, stated, was due to M r. E. J. Edgar. and at the L.M.S. Marine Department at Leon Gaster Memorial Premiums have been Holyhead. He joined the B.T.H. Co. at Rugby awarded by the Illuminating Engineering in 1906, and after some time in the drawing Society to Dr. J. N. Aldington for his paper on office and Testing Departm ent, joined the Export “ Bright Light Sources ” and to Mr. G. T. Department, being transferred to the Publicity Winch for his paper on “ Photometry and Department in 1912. From then onwards he Colorim etry of Fluorescent and -Other Electric was responsible for the preparation and publica­ Discharge Lamps.” No award of premium was tion of many booklets and pamphlets mainly made in respect of 1944. concerned with the heavy products of the The telephone number of Mr. E. W. Krebs company, in particular, turbine work. During was incorrectly given in our last issue. It is the 1914-18 war he received a commission in Uplands 0789. the Royal Engineers, and served in France from 1915 until 1919. On the lighter side, M r. Viner Appointments Vacant.— Am ong the vacant will be remembered for the interest he took in positions advertised in this issue are the follow ­ the Gilbert and Sullivan operas produced by ing:— Borough electrical engineer for Stoke the B.T.H. Operatic Society. New ington (£831 -£978); chief electrical engineer and manager for Winchester (£824, plus £60); Sir Frank Heath.— We regret to record the electrical engineer and manager for Pontypridd death on October 5th, at the age of eighty-two, (£797, plus £60); electrical engineer for W hit­ of Sir Frank Heath, G.B.E., K.C.B., the first worth (scale salary); deputy borough electrical head of the Department of Scientific and engineer for Barking (£823, plus £72); deputy Industrial Research. chief engineer and manager for Croydon Mr. L. C. Benton.— Information has just (£1,350 plus £60, plus £400); resident engineer reached us of the death, which occurred earlier for Manchester (£839 and house); generation this year, of Mr. L. C. Benton, A.M.I.E.E., engineer for Bulawayo. Southern Rhodesia who was for forty-six years associated with the (£750, plus cost of living allowance); mains British Westinghouse Co. and its successor, engineer for Bolton (£662); station superin­ the Metropolitan-Vickers Electrical Co., Ltd. tendent, Sierra Leone (£500 plus allowances); Throughout his service with the company Mr. consumers’ engineer and meter superintendent Benton was concerned with the work of the for Chesterfield (£640); and civil engineering Instrument and Meter Department. He was designer for West M idlands J.E.A. (£684). superintendent of the manufacturing depart­ October 11, 1946 E lectrical R eview 575

ment from 1919 to 1922, when he returned to 11-1 m illion over the previous year being made the engineering side to develop automatic and possible by the recommissioning on December supervisory control gear. From 1930 onwards 31st last of No. 6 turbo-alternator the blading, he occupied the position o f special sales engineer, rotors and stators of which were wrecked by a representing the com pany on many B.E.A.M .A. fire in September, 1943. and B.S.I. Committees. Gross revenue amounted to £450,756 Mr. B. Vedenyer.— The death occurred (£427,206) and working expenses were £386,797 recently, at the age of sixty-one, of Mr. Boris (£351,545), the net surplus for the year being Vedenyer, chief engineer of the Dnieper hydro­ £4,541 (£17,152). electric works. Mr. Vedenyer had been con­ Leigh.— A decrease of 6-3 per cent in industrial cerned with water-power development for many power sales during 1945-46 is recorded in the years and was connected with the construction annual report of the borough electrical engineer of the Dnieper Dam in its earlier stages and and manager (Mr. T. S. Parkinson). This was with the building of the Lenin station, Volkhov. practically balanced by increases under other His work during the war, as Deputy People’s tariffs and the total sales of 26-2 million kW h Commissioner for the Power Stations, was to were only 0-5 per cent less than in the previous ensure the co-ordination and maintenance of year. Income, at £116,377, was £2,798 higher electricity supply over wide regions of Russia. on the year while working costs rose by £6,682 ■ Mr. C. H. Stagg.— The death has occurred to £101,692. After meeting loan charges, etc., suddenly at Norm anby (Yorks) of Mr. Charles there was a net profit of £1,551 (£3,463). Henry Stagg, former electrical engineer with Eston (Yorks) Urban District Council. He had been with the undertaking many years before Scottish Board’s Charges his retirement toxyard the end o f the war. fW IHE North of Scotland Hydro-Electric Mr. M. J. Chapman.— -The funeral recently Board (Charges) Regulations, 1946, made took place of Mr. Martyn J. Chapman who by the Secretary of State for Scotland after was the founder of the Electric Installation Co., consultation with the Electricity Com m issioners Wimbledon. He had been an electrical con­ (S.R. & O. 1946 No. 1555/S.58, Stationery tractor since 1900, and the business is now being Office, Id.), stipulate the methods of charging conducted by his son, Mr. K. M. Chapman. to be adopted by the Board. It is provided W ills.— Mr. T. Pogson, electrical contractor, that over an “ approved term of years ” the director of Bell Bros. & Co, (London), Ltd., Board’s revenue and expenses shall balance so Camomile Street, E.C., left £9,065 (net per­ far as is possible. The prices to ordinary sonalty £8,861). consumers (i.e., not authorized undertakers or Mr. Robinett Scruby, chartered electrical large power users) are to be at such a rate that engineer, left £3,167 (net personalty £2,792). the average shall not exceed 6d. per kWh, although a minim um charge of 10s. per annum may be made. The Board is required to fix a Municipal Reports block tariff or tariffs and it m ay fix alternative flat- rate, two-part or other tariffs for different classes Watford.— Except that m.d. consumers are of supply to ordinary consumers. paying additional am ounts based on the higher Although it is stipulated that tariffs shall be price of coal, there have been no material in­ uniform throughout the North of Scotland creases in electricity charges during the past District, the Board m ay vary them if the circum ­ seven years. Actually, the net average price stances in the area of any distribution scheme obtained per kW h sold in 1945-46 was 0-917d. justify such action. The Board is also given compared with 0-86d. in 1937-38. The chief power to charge rents for meters, “ lines,” engineer and general manager, Mr. A. W. fittings and apparatus. Costs and revenue in Barham, points out that this increase of only relation to supplies to authorized undertakings 6-6 per cent has been maintained in spite of a and to large power users, respectively, must 91 per cent rise in the price of coal and an alsoibalance as nearly as possible. increase of approximately 30 per cent in wages and salaries. The average cost of coal per kW h sold last year was 0-518d. against 0-262d. seven years ago. Nevertheless, for domestic Electrical Industries Ball electricity supplies under the Norw ich tariff the M OST attractive programme has been net average price obtained last year was only A arranged for Friday, November 8th, at fl-53d., which was lower than the 1938-39 Grosvenor House, Park Lane, when the Elec­ figure (0-56d.). Under this tariff sales last year trical Industries Ball is being held in aid of established a new record at 27-7 m illion kW h, the Electrical Industries Benevolent Association. Debroy Somers and his band will provide the an increase of 3-1 m illion over the previous year. music and there will be a cabaret of well-known Total sales for the year were 3-6 m illion kW h radio and television stars. Owing to the fact up at 112-6 m illion, although power requirements that accommodation will be strictly limited a declined somewhat. The Department itself ballot for tickets and table positions will be generated 26-7 million kWh, the increase of held on October 18th. 576 E lectrical R eview October 11, 1946 District Heating* Interim Memorandum of the Building Research Board

M T'OR the purpose of investigating “ the inferior local fuel, thus conserving oil and desirability of developing in this country avoiding long hauls of good coal from the Don schemes for the supply of heat for various pur­ Basin to such distant cities as Leningrad and poses by means of steam or hot water from Moscow , which have the largest electric heating central sources,” a sub-com m ittee of the Heating schemes. In Germany the severify of the and Ventilation (Reconstruction) Committee of winters and the desire to use brown coal have the Building Research Board was appointed in been im portant factors. October, 1942. Its chairman is Sir A. Egerton Temperatures of from 200 to 275 deg F or and its fourteen members include Mr. S. B. higher are requisite at the power station to give Donkin, Dr. O. Faber, Mr. A. C. Pallot, Sir satisfactory district heating service. As con­ Leonard Pearce, Mr. W. M. Selvey and Sir denser cooling water is discharged at from 70 Johnstone W right, all with electrical associations. to 75 deg F, it could not serve the purpose. The A large hypothetical thermal-electric scheme cost of adapting existing turbine plants to is under consideration, with a view to elucidating thermal-electric operation would be prohibitive various problems and to providing a “ yard­ and would incidentally reduce the electrical stick ” for the assessment of other schemes. output. New turbines of the pass-out type It may be several months before this work is would require further boiler capacity. No completed, so the Sub-Com m ittee has issued an reduction in electrical output could be con­ Interim Memorandum. In this it is stated that templated. The higher capital cost of thermal- only limited use has been made of district electric stations would be enhanced by the heating in Great Britain for domestic purposes probability of having to use smaller and more (e.g., at Dundee), although at Liverpool and numerous generating sets. This increased Leicester, for example, steam is supplied from expenditure m ight be justified if a substantial electric power stations for specific industrial saving of coal resulted, but this would depend processes, but heat-distribution systems have upon the securing of a close balance between not been provided. The largest installation heat and electricity services. Lack of coincidence possibly anywhere in the world, in which steam in the two loads might, however, be compensated for process or space heating is combined with for by means of the grid or by storing heat in electricity generation is that of the Imperial water accumulators (as is done in Germ any but Chemical Industries at Billingham-on-Tees, not in the U.S.S.R.). where over 600,000 lb of steam per hour is used. A thermal-electric station should be near the heat load, whereas long-distance transmission Foreign Schemes Assessed from a riverside site m ight be necessary and In the United States, the total length of the operating economy and the requisite additional distribution systems of the nine largest under­ railway facilities and cooling towers would takings is only 211 miles and the number of introduce difficulties in built-up areas. consumers is 6,409. In the ten cities of the The Mem orandum concludes with an. appre­ U.S.S.R. with m ost district heating, the mileage ciation of the admitted benefits that would in 1939 was 1,354, the number of consumers accrue from district heating such as adequate 1,063. A similar number of undertakings in hot-water supplies, better standards of warmth, Germany have 90 miles of mains and 1,693 reduction of atmospheric pollution and elimi­ consumers. In all three countries the heat is nation of much road traffic concerned with supplied to large buildings, although in the retail distribution of coal and ash removal. It United States and also in Sweden some success is suggested that thermal-electric schemes has been achieved in serving small housing might be tried in urban areas scheduled for estates. Experience gained in the United States reconstruction, in large residential neigh­ and the U.S.S.R. is not regarded as directly bourhoods or in sm all housing estates. applicable to Britain. In the United States, heat and electricity are usually supplied from Trade Mission to China separate sources on account of the economic PW>WO Transport Command aircraft, one difficulty due to fluctuations in the two services -■ equipped as a “ flying office” and the other which are caused by different rates of growth, as a repair shop, left N ortholt last week carrying seasonal or diurnal variations and the effect on the United Kingdom trade mission to China, heat sales o f com petition from alternative sources, led by Sir Leslie Boyce. The aircraft, a York In the U.S.S.R. the main development has and a Lancastrian, have been specially fitted been in new self-contained townships where the out to make the mission self-sufficient. One carries engineers, spare parts and repair equip­ buildings have been constructed to use district' ment while the other has an office which the heating without option. Thermal-electric secretariat will use for the collection of materials stations have been designed to burn very for the com pilation of the m ission’s report. October 11,1946 E lectrical R eview 57? Impregnated Pressure Cable Limitation of Working Stress

HEN transmission voltages were raised advantages follow. The reduction in wall W to the values (approaching 33 kV) at thickness decreases the size of cable, enabling which it became apparent that cable dielectric one three-core cable to be made in place of must be subjected only to radial fields, each three singles and also by lowering the thermal core was screened in order to eliminate resistance allows of higher current ratings. tangential stress. A further design problem A third gain is that, since the effect of heat was met at the next stage, i.e. 66 kV. That cycles on the insulation characteristic is con­ was the need to limit the working stress with trolled by the pressure, the conductor tem­ paper insulation to 50 kV per cm in order to perature can be raised to 85 deg C, as against suppress destructive ionization in the voids 70 deg with the solid cable; this further formed during expansion and contraction improves the current rating. under varying loads. It was found that As an example the wall thickness of a operating stresses of more than 100 kV per 0-3 sq in. 66-kV pressure cable at 100 kV cm would be feasible when the dielectric was per cm is 0-20 in. and of a solid cable at subjected to pressures above the atmospheric. 50 kV per cm 0-65 sq. in.; at 132 kV the The method adopted for the impregnated- figure for a 0-4 sq in. cable is 0-5 in. and pressure cable, developed by B.I. Callender’s, would reach impracticable dimensions with the lower stressed dielectric. The overall diameter of a three-core pressure cable carrying 40,000 kVA at 66 kV is 31 in. compared with 5£ in. of a solid cable with three separate cores. The econom ic value o f the use of gas under pressure is indicated by representative

Jointing 132-kV three-core 0 4 sq in. (120 M VA) impregnated pressure cable. A b o v e is se en ste p f o r m ­ ation of the cable.' dielectric after jointing with flush ferrules, with temporary spreaders m aintaining core positions and temporary snuggers preventing disturbance of paper tapes. The right-hand illustration shows the three cores complete, tapered sections covered with lead-wire screen, internal pilot cable jointed and autom atic pressure switch in position ; gas communication pipes terminated on both sides near the top; lead sleeve partly pulled forward for placing in position and (on right-hand side) copper sleeve attached to travelling cradle mis to introduce nitrogen at 200 lb per sq in. figures of capital cost per 1,000 kVA per mile direct to the dielectric, enabling a stress of of 0-4 sq in. cable, laid, including joints, about 160 kV per cm to be employed, which accessories and pilot, but excluding excavation " is claimed to prevent ionization up to at least and reinstatement. This is given by the 44 times working voltage. Three main makers as £14 5s. for 132 kV and £18 6s. f,or 578 E lectrical R eview October 11,1946 I

66 kV, compared with £28 3s. for the latter stant with no evidence of deterioration. voltage only for solid cable. As a guide to Power factor measurements taken on the material economy, the weight of lead required dielectric up to more than five times working jÿpJo voltage indicated only 0 # b a slight rise in power 4 if.® factor, which was attributed to the I! characteristics of the pimfa 0-005 a ® « Power-factor values at d if f e r e n t c o n d u c t o r tern* p e r a t u r e s a s u n d e r service 0-002 conditions.

dielectric and not to , [g p| ionization. 1 ;;aI ^ 50 60 A lthough the instal- . ;-:;; TEMPERATURE °C lation is gastight, as a jjm precaution against loss ^ j ' o f pressure in the event ^ 01 per 1,000 yd, is stated to be 9,040 lb for the of external damage, e.g. by a pick, three ^ direct pressure cable and 18,970 lb for the cylinders of gas are normally permanently solid cable with lead membrane. connected through a reducing valve to The nitrogen is admitted into the cable m aintain the pressure for at least twenty after installation and, in the three-core type, hours or, by adding temporary cylinders, 1 passes through a lead pipe, which is included for longer periods. Immediate indication in one of the dummy spaces, into each joint. o f m echanical dam age is given at the control Thence it traverses the annular space between point, so that repairs can be undertaken iiffl by tt the dielectric and the lead sheath. The mass- before an electrical fault develops and, w fe impregnated paper dielectric is enclosed within since ingress of moisture is prevented by a lead sheath reinforced with tapes of copper gas leakage, the area of damage is localized. for single-core and steel for three-core con­ Two methods have been devised for struction. Round the reinforcement is a locating gas leaks. In one, which can be series of uncured rubber and bitumen tapes used while the cable is in service, the pressure :j£j as a safeguard against corrosion. The power is maintained by the admission of dry air factor of the dielectric is approximately 0-25 from one end as far as the point of leakage, o:®] lut| per cent over the whole conductor temperature range up to working voltage. A length of impreg­ nated pressure cable with a normal working

General view of the h.v. cable exhibition at Dor- land Hall. An example of a straight joint in a 264 kV single-core impregnated pressure cable is seen in the foreground stress of 93 kV per cm with two sealing ends has been subjected to •bln heating cycles to a 4by( conductor temperature >po of 95 deg C and a voltage equivalent to which is determined by the volume of the ^ofaln a stress of 175 kV per cm. The voltage was air; fault location has proved accurate to a to hr increased in frequent steps until 250 kV per within 5 yd on a mile run. In the second ® ''was cm was attained. During the whole test the method pressure-operated switches are in- .. power factor of the dielectric remained con- eluded in each joint and connected by a- October 11,1946 E lectrical R eview 579

characteristic resistance to a two-core pilot the outer surface of the conductor, which in the filler space of the cable. At the control avoids longitudinal stress at the ends of the point, the pilot is connected to an autom atic former and facilitates the application of the Wheatstone bridge. When gas leakage paper tapes; the outer screen of the cable is occurs, the gas supply is cut off temporarily carried continuously across the joint. and the pressure switch in the nearest joint Of a number of installations in which to the fault is the first to operate, giving impregnated pressure cables have been automatic indication of the point of leakage installed from 33 kV upwards, the most to within one cable section length. notable are a 100 yd run of single-core 264-V Each joint box consists of an outer copper cable, which was laid for K.E.M .A., Holland, sleeve to act as the pressure housing with an in 1936 and 1,900 yd of 132-kV (the first to - inner laid sleeve, the space between being be installed anywhere as a three-core cable) filled with a viscous bitumastic sealing com­ which was inserted in an overhead line of the pound. Cast plum bs m ake hermetic seals Central Electricity Board near an aerodrome between joint sleeves and cable and anchor site in May, 1944. the reinforcement tapes. The joint itself is The three-core cable has an overall diameter filled with nitrogen at 200 lb per sq in., not of 4-84 in. compared with 2-67 for each with compound; pneumatic pressure tests single-core cable of the same type, conductor can be carried out on the joint before it is size (61/-093) and voltage supplied for other . completed. The split ferrule fits flush with installations. European Power Supply Report of Emergency Economic Committee

± IN a report by the Secretary-General of the Though concerned mainly with electric power *■ Emergency Econom ic Committee for Europe, the Panel includes gas supply within its scope, published by the Stationery Office (price 6d.), and is assisting in the construction of a pipe-line i, the work of the various sub-committees and from Germany to Holland. Some difficulty was panels— including the Public Utilities Panel— met in getting necessary m aterial but eventually is briefly described. This last-named panel took the project was begun and should be completed over the functions of the Public Utilities Section by this autumn. M onthly statistics showing the of S.H.A.E.F. when the latter was dissolved, position in each country with respect to pro­ and numbers am ong its members representatives duction, consumption, export and import of Si of the control authorities in Germany and electricity and gas are issued and discussed at Austria, as well as of many of the Allied and each meeting. j neutral powers. It is in close touch also with Swiss representation on the Panel was invited the European Coal Organisation (E.C.O.) a at an early stage of its proceedings and has been liaison which is clearly essential. effective since May, 1946. It has proved Besides co-ordinating the netw ork o f electricity particularly welcome, in view of the increasing supplies in most of North-Western Europe, importance of hydro-electric power, and the through the International Council of Load need for maintaining a fair allocation of coal ,4 Dispatchers in the British Zone of Germany, by the E.C.O. as between those countries with hthe Panel is concerned also with reconstruction large supplies of such power and those with of lines for export of power from Germ any to little or none. ter neighbours. Thus, a line was re-opened The Panel is considering the possibility of rom Germ any to supply power to both Belgium developing in Europe an integrated power ind Holland in October, 1945; and estimates system such that international distribution of or overall Germ an production, home require- hydro and thermal power may be so regulated nents and balance for export, have been under as to counteract seasonal and local variations constant examination. By the end of 1945 and ensure a fair and stable supply to all here was sufficient installed capacity to meet countries throughout the year, consistent with he needs of all members, though actual output the most economic use of Europe’s fuel and vas still lim ited by the am ount of coal available. power resources. Work already sponsored by the Panel includes A small working party has been set up for instruction of a line from Germ any to Holland. the purpose of exam ining existing organizations, ««A direct line to Luxem bourg has also been con- and the most effective means of planning and jaiïlidered, b u t it w a s d e c id e d t h a t p o w e r c o u l d b e co-ordination both in the immediate future and ignore economically provided over the existing as a long-term policy. This may involve some g ines to F r a n c e a n d B e lg i u m . C l o s e r i n t e g r a t i o n permanent body as part of any machinery for jietween Luxem bourg and the French network effective economic co-operation among the îClîi ¡under consideration. European countries. 580 E lectrical R eview October 11,1946 International Technical Congress Summary of Engineering Proceedings

U R IN G the Paris meeting of the Inter­ approach of an “ atomic age,” and emphasized a n national Technical Congress 130 papers that engineering and economic factors would i l were presented by delegates from fourteen of largely determine possible applications. the thirty participating nations, and discussed. Many years of research would be required " V The work of the Congress was classified into before a power station could be built that would four sections as follows:— Technical problems be capable of transform ing a source of atomic '¡ ¡ a of reconstruction and economic development of energy into electricity. The problem s related to war-devastated countries; atomic energy; the the media to transfer the heat energy to turbo- i,£i. present state of technical and engineering pro­ generators, the temperatures involved, the jfeialsh' gress; and the organization, social responsi­ resistance of construction materials and pro- ;Ssei* bilities and training of engineers. A resume tection against dangerous radiations. Little data it«*® has already been given of a selection of some was available on economic factors, but for of the sixteen papers given by British delegates some time the production costs of atomic in t h e Electrical Review of September 20th. energy applied to industrial uses would be Reports were rendered by delegates from considerably in excess of those of other forms countries devastated during the war, including of energy. Am ong possible future applications Jw Vs Czechoslovakia, France, Hungary, Luxemburg, was ship-propulsion, which would permit a gntiKI..« Poland and Roumania. One of two films from sea-going vessel to cover m any thousands of w&bMk» Hungary showed the rapid rebuilding of the miles without refuelling. Francis-Joseph Bridge spanning the Danube and Papers submitted on the present state of - ' linking Buda and Pest according to the original engineering progress were prim arily concerned design, with the aid of two 100-ton floating with the generation and utilization of power, c r a n e s . industrialization, mechanization of agriculture, housing and town-planning, communications ¿tithe River Rhone Scheme a n d t r a n s p o r t . rife. Copies A paper by a French delegate, Monsieur R. V isits were paid by electrical engineer delegates tfc BritH Giguet, dealt with the harnessing of the River to the central control room of the distribution -1*1 Rhone— an important part of the French plans network of the French U nion d’Electricite and for extended industrialization. The scheme also to the Arrighi power station at Vitry, includes, in addition to increasing the navig­ where four 55,000-kW generating sets and :gimsappeari ability of the river, the erection of a barrage pulverized-coal autom atic boilers are installed, a «/ 5mm and hydro-electric station at Genissiat and Am ong countries submitting reports on Aim of eta construction of transmission lines linking the telecommunications were America, France and 01 fc) station with the high-voltage network centred P o r t u g a l . on Paris. A film was shown of the restarting A number of papers were given on the of the constructional work at Genissiat which organization and training of engineers in -..^, was commenced in 1938. The first stage of various countries including China, France,-,^ (tir the plant (280,000 kVA) is expected to be in Great Britain and the United States. *¡«¡¿«¿40 operation by the end of 1947. Other barrages ■ *!»• hsao on the Haut Rhone are also projected. ® rose fro

Atomic Power Colour Television in America ■•Ml a April recent demonstration of colour television -v-tpn iof In the session devoted to Atom ic Energy, A inN ew York by the Colum bia Broadcasting ■ O0| Mr. Lee, an American delegate, presented a System was described by the com pany’s president report by Mr. H. A. Winne, vice-president of a s “ more than measuring up to our most Shorts' the General Electric Com pany, who was one of optim istic hopes.” The demonstration included the five members of the Lilienthal Com m ission radio singers, paintings, and a boxing match, ; “Wi of set up by the State Department to advise on and viewers stated that no blurring was evident «ati® throughout. •’* Mi of t] the problems of nuclear energy from the Distributors of R C A Victor television sets - premiss international point of view. Monsieur Gueron, have promised limited delivery of two new Pin of boi one of the principal collaborators in France models early in October. The company hasjP lic to n , with Monsieur Joliot-Curie, Haut Commissaire also produced a large-screen projection type '!lqioit( a l’Energie Atomique, took part in the dis­ receiver, which has an im age the size of a news- !! about ■ cussion. Mr. Winne’s paper reviewed the paper page, and incorporates normal and-stic scab enormous complexity of the technical and frequency modulation radio reception. ThewottBto com pany is concentrating on setting up antenme a n on all econom ic problem s involved in the construction installations for dealers, as well as instituting a-son insti of a plant that could make nuclear energy plan whereby purchasers of sets will receivesi the s available for industrial and domestic use. It antenna, installations, operating instructionsAfacture discounted the many extravagant prophecies and a year’s service and m aintenance for aiHPment, e that had been made concerning the near inclusive charge.— Reuter's Trade Service. ^.two-thV N a t a l October 11,1946 Electrical R eview 581

iOlMERCK and IM M S l i d Domestic Oven Cooking Tests. Appliance Production Expands.

O L D IN G that actual work ing tests at present will be allocated by the end of the year. The H provide the only satisfactory basis for assess­ release of the premises will not, however, ing the perform ance of dom estic electric cookers, be completed until towards the end of next the British Standards Institution has issued y e a r . B.S. 1315 (Pt.I) with a view to aiding supply undertakings and others in the selection of P.O. Engineers and 40-Hour Week ovens. In this a wide variety of cooking operations is prescribed with specified ingredients A claim for acceptance of the principle of the f o r e a c h . 40-hour, five-day week has been made by the The tests have been selected to give results Post Office Engineering Union. The Union that have a minimum dependence on the skill has asked that a joint committee should be set of the cook and on such extraneous factors as up to work out the details and that during the air temperature and quality of ingredients, but transitional period the working week should be they can only effectively be carried out by 43 hours to operate at once. It has been made skilled cooks. The materials have been selected plain by the Union that it wants an actual for uniformity and not necessarily for quality reduction in working hours, and not merely or palatability. an arrangement that would involve increasing The tests prescribed are for scones (high- the proportion of overtime. tcmperature), small cakes and sponge sandwich (heat-distribution), rich fruit cake (low-tem pera- Glasgow Underground Railway Lighting ture long-period) and a complete dinner (full­ Some months ago “ Osram ” fluorescent load test). A bread-baking test is optional. lamps were installed in an experimental Under­ An appendix gives some plainer recipes for use ground coach of the London Passenger Trans­ when the standard ingredients are not obtain­ port Board. These were operated from a able. As the reaction of these to variations in cooking conditions is less critical than that of the standard, the latter should be used whenever possible. Copies of B.S. 1315 can be obtained from the British Standards Institution at 2s. e a c h n e t. Electrical Appliance Production Figures appearing in the September Monthly Digest o f Statistics show that the monthly production of electric fires during the second quarter of this year was 225,000, of which 199,900 were for the home “ civilian ” market. This compares with an average of 28,500 in April-June, 1945, of which 22,700 were for the home market. Electric irons averaged 302,700 per month (241,700 for the home market), compared with 40,400 (37,900) in April-June last year. The monthly production of vacuum cleaners rose from 6,400 (6,300 for home market) in the second quarter of 1945 to 52,200 (42,900) in April-June this year and the monthly output of kettles from 11,400 (11,100) Glasgow Underground coaches lighted by "O sram " to 48,200 (37,200). fluorescent lamps Shorts’ Rochester Factory 1,200-cycle a.c. source supplied by a suitable motor alternator which was driven by a motor The Board of Trade announces that three running off the 600-V traction supply. Recently, major allocations have been made covering a similar experiment has been carried out on almost half of the available factory space in the Glasgow underground railway by the City Shorts’ premises at Rochester. These cover a Transport Department. Here it was possible to large part of both the seaplane works and the use standard “ Osram ” fluorescent lamps airport factory, in all nearly 350,000 sq ft. without the necessity of producing special At the airport factory B. & P. Swift, Ltd., will equipment to provide the current. employ about 450 men on the manufacture of The installation was carried out by engineers automatic scales, gears, hydraulic pumps, etc., of the Glasgow Transport Department, under and Elliott Brothers (London), Ltd., will employ the direction of M r. E. R. L. Fitzpayne, and in 500 men on all types of electrical and mechanical consultation with the Glasgow branch of the precision instruments. C.A.V., Ltd., will take G.E.C. The complete scheme involved the shops at the seaplane works in which they will fitting of two coaches (a power coach and a manufacture fuel injection pumps, electrical trailer coach) with twenty-eight 4-ft fluorescent equipment, etc., employing 1,200 persons, at lamps of the daylight type, each mounted in least two-thirds of whom will be men. It is the standard G.Ë.C. fitting. Each side of the anticipated that the remaining factory space two coaches is fitted with seven lam ps mounted 582 Electrical Review October 11, 1946 i '1 about 6 ft 6 in. from the floor. The total lamp metal reclamation, ship breaking and salvaging, 0 wattage per coach is 560 and the lighting airfield construction, and the production of $1 intensity provided is approximately 22 lumens midget submarines, all came within the scope p e r s q ft. of the com pany and its associates and the way in which this work was carried out, often whilst Battery Vehicles for Local Delivery under enemy aerial bombardment, makes interesting reading. The suitability of battery electric vehicles for 3* local delivery work was emphasized last week National Chamber of Trade Conference by Mr. R. C. Hawkins, assistant secretary of iW the Electric Vehicle Association of Great Am ong subjects to be discussed at the autumn fit Britain, Ltd., in a paper presented at the Soft Conference of the National Cham ber of Trade Drinks Industry Protection Association’s con­ to be held at the Assembly Hall, Tunbridge 101 vention held at the Connaught Room s, London. Wells, on October 23rd and 24th, are improve­ ¡1» Am ong the special features stressed by Mr. ments in the method for dealing with Class C Hawkins were their simple construction, low releases from the Forces, the adoption of a maintenance and running costs, low depreciation, uniform method of calculating and showing safety, cleanliness, silence, easy starting and purchase tax on invoices, and the investigation reliability. Typical costs for a 200-mile week into the increase in delegated legislation. Sir it I with a 10-cwt payload were £2 16s. Id. for an W alter W om ersley will preside at the conference ¿K2St! electric vehicle and £3 16s. 8d. for a petrol and the opening session will be addressed by stefi vehicle. For a 1-ton payload the corresponding Mr. J. W . Belcher, M.P., Parliamentary Secre­ costs were £3 9s. 8d. and £5 Os. Id. respectively. tary to the Board of Trade. B Following the paper there was a parade of W representative electric vehicles in Lincoln’s Transformers for Yugoslavia and China $2tt Inn Fields in which six manufacturers demon­ -ant strated their latest models. A “ pony ” three- Gresham Transformers, Ltd., has received ¿df wheeler was shown by the Brush Electrical contracts for the supply of sixty-six power Engineering Co., Ltd., together with a standard distribution transformers for voltages up to 30 kV for Yugoslavia and sixty-four 13-kV as of it 18/22-cwt model. Crompton Parkinson had a ¿III 2-ton flat deck, while M idland Vehicles, Ltd., distribution transform ers for shipm ent to China. rse as exhibited a 12/15-cwt open-sided milk van. Bradford Light and Colour Exhibition ios ha One of a fleet of 208 1-ton vehicles being aM manufactured for a firm of mineral water Following the very successful Light and iiootii manufacturers was chosen for display by Colour Exhibitions organized by the Cotton Northern Coachbuilders, Ltd., and typical of Board in Manchester and the Hosiery Working the heavier types was a Tilling-Stevens 4/5-ton Party at the Wolsey M ills in Leicester, the Paten Ilk Hi '3! KSti ate 24 SiSCOD! . : »loft asFoi a OS

tepoi 4 Utesi

lie Display of electric vehicles arranged in connection with the Soft Drinks Industry Protection Associ- aaonin ation’s convention lorry with a hinged side. In addition to a Leeds office of the Lighting Service Bureau has Graisley works truck and a milk pram shown co-operated in organizing another exhibition on «!■ 11 by Diam ond Motors, Ltd., there was a third similar lines at Try Mills, Bradford. This was 410.1 Graisley 2-ton vehicle used by Partridge W ilson recently opened by the Lord M ayor of Bradford tfeititr & Co., Ltd., as a stand for displaying specimens (Alderman Mrs. Kathleen Chambers) in the •fttut' of their charging equipment, including the first presence of local M .P.s and leaders of the textile SiiiEt of a redesigned series of “ Davenset ” units trade representing em ployers and unions. intended particularly for electric vehicle work. The exhibition, which is being held under the f auspices of the Wool (and Allied) Textile tfilfo Thos. W. Ward’s War Activities Em ployers’ Council, demonstrates to the whole 3feii trade the transformation that can be brought In com m on with the majority of engineering Sptklii about in the ordinary m ill in order to provide conperns, the greater part of the activities of :%lil Thos. W . W ard & Co., Ltd., and its associated an environment likely to attract labour and ‘test com panies were switched over to the prosecution improve the conditions of the operatives. An inilci of the war. The important part played by the old warehouse used as an air-raid shelter has 'iUU( company and its associates, and some of the been converted into a cheerful canteen and iltial m any difficulties which were overcome are told rest-room, and two floors of the mill made a 'aindi in “ End of a Chapter ” which the com pany has pattern for the correct application of lighting 'im a just published. Such diverse tasks as scrap and colour. Mr. F. Harrison, managing «ole 'Jinei October It, 1946 Electrical Review 58?

director of the Thornton Spinning Co. in whose licences which are now necessary, there are still premises the exhibition is being held, anticipates many which have not. The Society therefore that his production will be increased by at points out that it is essential that all owners least 10 per cent under the im proved-conditions. of factories and canteens should obtain from the Society without delay the licence now necessary Large Stator for Hull if “ Music While You W ork ” and other copy­ right music is to be enjoyed without danger of The General Electric Co., Ltd., Witton, has infringement of copyright or liability to legal this week despatched one of its biggest loads proceedings. The cost of the licence is assessed by road to Hull. It is the 95-ton stator on the basis of a penny a year per employee o f a 37,500-kyA, 22-kV, 3,000-r.p.m. turbo­ for half-an-hour’s music daily throughout the alternator for the Sculcoates generating station. year, with a m inim um fee of £2 2s. per annum. The turbine has been made at the Fraser and Chalmers W orks, Erith. The 20-ton trailer which Australian Overseas Trade has been used is propelled by two 240-H.P. tractors, one at the front and one at the back Electrical imports into Australia during the of it. As the load was so heavy the Ministry of twelve months ended June last totalled Transport would not authorize a direct route £5,281,000 in value, compared with £6,446,000 and it has had to go via Wolverhampton, during the preceding year. Details were as Newcastle-under-Lyme, Bradford, Manchester, f o l l o w s :— Huddersfield and York. 1944-45 1945-46 Class o f goods Developing Aircraft Radio £ 000 £ 000 The space restrictions in aircraft necessitate Batteries and accumulators.. 202 84 Cable and wire, covered 662 610 careful attention in the design of airborne radio Dynamo-electric machines . . 778 1,076 equipment if the m axim um convenience is to be Lamps, filament 108 169 obtained for installation, operation and m ain­ Telegraph and telephone tenance. To keep these factors well in the switchboards 1,380 1,116 minds of its engineers Standard Telephones and Electrical machinery and appliances Cables, Ltd., has purchased a Dakota fuselage 3,316 2,226 for use as an aircraft radio laboratory. The Australian exports of electrical appliances Dakota has been delivered to the company’s and equipment in 1945-46 were valued at New Southgate W orks where it is now being £537,000, against £350,000 in 1944-45. fitted out for its novel application. London J.E.A. Consumers Patent Restoration Application In our report of Alderm an Shaw’s remarks at The Utility Electric Corporation has applied the luncheon of the London and Hom e Counties for the restoration of Patent No. 534,088, dated J . E . A . (Electrical Review, October 4th) the October 24th, 1938, for “ Com bined multi-light number of consumers supplied by the Authority incandescent lamp and switch.” This patent was given as 132,000; it should have been lapsed on October 24th, 1945, owing to non­ 1 3 8 ,0 0 0 . payment of the renewal fee. Notice of opposition (Patents Form No. 17) may be lodged at the Substation Battery Patent Office, 25, Southampton Buildings, London, W .C.2, on or before November 18th. An Alton battery with a capacity of 5,280 Ah, has been installed at the Fisher Street sub­ Reports on German Industry station of the Metropolitan Electric Supply Co. This battery, like two other Alton batteries, The latest list of reports by investigating rated at 6,400 and 5,200 Ah respectively, teams on various branches of Germ an industry installed at the same substation, will be used include the following:— B.I.O.S. 572, “ In­ to deal with peak loads and limit the vestigation into Manufacture and Use of Carbon maximum demand on the substation. The new Black and Lam p Blacks in Germ any ” (10s. 6d.); battery replaced an old battery which was last B.I.O.S. 600, “ German Heavy Electrical replated by the Alton Battery Co. in 1930. Industry. Motors and Power Transformers ” (3s.); B.I.O.S. 708, “ Germ an Alkaline Accum u­ Television Stimulates Production lator Industry” (Is. 6d.); F.I.A.T. 292, “ The Manufacture of Laboratory Apparatus, Instru­ During the war efforts were made to boost ments and Equipm ent ” (Is. 6d.). production by talks b y members of the Forces, etc., to factory workers, bringing hom e the vital Music in Factories need for their particular manufactures. In particular this applied to makers of sm all com ­ The Performing Right Society, which repre­ ponent parts. W ith the return to peace most sents the interests of composers, authors and factories complain of the same things— a tired music publishers in the public performance of feeling (not entirely unexpected after six years their copyright music, states that over six m onths of war) and a lack of interest. W ith the object have passed since the agreement between the of com bating these depressions, the Telegraph Government and the Society, by which the Condenser Co., Ltd., North Acton, recently performance of copyright m usic in factories and staged a television exhibition in conjunction industrial canteens was sanctioned without fee with its W orks Television Society. Several to the individual manufacturer, came to an end. well-known types of television receivers were While many factories and canteens, including exhibited together with some made by members th o se o f Governm ent Departments, have already of the Society. Other sets were dismantled to o b t a in e d f r o m the Society the individual show the “ works.” These were of special •584 E lectrical R eview October 11, 1 c)4fi

interest to the workers of this particular factory of base connections, tabulated operating data because even the smallest receiver contains at and list of replacement and substitution types. least fifty different types of fixed condensers. Dawe Instruments, Ltd., Harlequin Avenue, Afternoon tea breaks were arranged so that Great West Road, Brentford, Middlesex.— workers could see the television programmes Illustrated loose-leaf catalogue of electrical, being broadcast. electronic and radio measuring and testing Sale of Radio Sets instruments for laboratories and factories. Churchill Machine Tool Co., Ltd., Broadheath, Ilford Corporation recently decided to Manchester.— A 28-page illustrated brochure approve the sale of radio sets by the Electricity dealing with heavy plain grinding machines. Committee and now the borough electrical Fraser & Chalmers Engineering W orks(G.E.C.), engineer has reported to the Com m ittee that he Erith, Kent.— Technical brochure (No. 9915j has placed an order for the purchase of 50 sets describing with the aid of diagrammatic illus­ at the agreed total cost of £696 for sale on a trations the separation of ores by flotation. cash basis to the public. There are three types. [Applicants for copies of these publications He reported that the question of fixing a retail should write on their firm s’ business notepaper.j price for such sets was under discussion by the joint committee of local authorities on radio Iron and Steel Board and television and that the matter would be the subject of report in due course. A letter has The offices of the Iron and Steel Board have been received from the local Cham ber of Trade been established in Bush House, Strand, London, protesting against the scheme. W . C . 2 . “ Britain Can Make It ” Lighting Trade Announcements

Thorn Electrical Industries, Ltd., ask us to From November 18th distribution of Philco mention that in addition to the “ Atlas ” radio and television receivers (car radio excepted) coloured tubes provided by them for various in Southern England, south of a line approxi­ parts of the “ Britain Can M ake It ” Exhibition, mately mid-Wales to the Wash, will be on a they also supplied a considerable number of “ direct to dealer ” basis. The rest of England, standard translucent lighting units with warm- Scotland, and Northern Ireland will be covered white tubes for the illum ination of the various by distributors, who will have sole distributing furnished rooms. rights in the areas for which they will be appointed. The Philco service scheme, as United Nations Radio Network originally announced, is to be allowed to lapse and will be incorporated in the Philco accredited The United States State Departm ent last week dealer scheme. announced a proposal for the creation of a M arconi Instruments, Ltd., has established world-wide United Nations radio network, a Southern Area office and London showroom estimated to cost £62,500,000. The proposal at 109, Eaton Square, London, S.W .l (telephone: was made to Mr. James F. Byrnes, Secretary Sloane 8615). The representative in charge is of State, by the official advisers assigned to M r. R. J. Bailey. shaping Am erican policy on the United Nations educational work.— Reuter. Macrom e, Ltd., Alcester, Warwickshire, have been appointed sole overseas agents (except for Northampton Electrical Association Australia) for the products of E. C. Hopkins, Birmingham. The annual general meeting of the Northam p­ Alliance Wholesale, Ltd., has again extended ton and District Electrical Association was held its Bute Street, Luton, premises. at the College of Technology, Northam pton, on September 25th, when a large number of mem­ bers attended. Mr. O. F. Bailey, B.Sc., A.M .I.E.E., was elected president. After the TRADE MARKS business, films of general interest were shown. The programme for the 1946-1947 session H E following applications have been made opened with a lecture-demonstration on “ Tele­ T for the registration of trade marks. Objec­ phones ” by M r. E. J. Bagnell on October 9th. tions may be entered within a month from October 2nd:— American G.E. in Turkey Tronia. No. 641,892, C l a s s 7 . E le c t r ic a l hair waving appliances.— G. Briggs and W. Under an agreement \9ith the Turkish Govern­ F le t c h e r , 5, Rampayne Street, London, S.W.l. ment the American General Electric Co. is to S c o n a . N o . 6 3 9 ,7 8 5 , C l a s s 9 . E le c t r ic a l establish factories in Turkey for the production apparatus and instruments included in Class 9; of electric lam ps.— Reuter. scientific, cinematographic, optical, weighing, measuring, etc., apparatus and instruments; Trade Publications talking machines; and parts (not included in other classes).— General Aniline & Film Cor­ Sunvic Controls, Ltd., Stanhope House, Kean p o r a t i o n , 2 3 0 , Park Avenue, New York. Street, Kingsway, London, W .C.2.— Illustrated Address for service: c/o McKenna & Co., 12, leaflet (TD .lO a) describing with the aid of circuit Whitehall, London, S.W .l. diagram s adjustable time-delay switches housed P e n e t r a y (design). No. 6 3 8 ,0 6 0 , C l a s s 11. in bakelite m ouldings. Electric drying and heating lam ps and electric Mullard Wireless Service Co., Ltd., Century incandescent lamps.— Verd-a-ray Corporation, House, Shaftesbury Avenue, London, W .C.2.— 6 1 5 , Front Street, Toledo, Ohio, U .S.A. Address Radio valve and service guide (for use of the for service: c/o Frank B. Dehn & Co., Kingsway trade only) with diagrammatic representation H o u s e , 1 0 3 , Kingsway, London, W .C. 2 . Oc ! aber 11,1946 E lectrical R eview 585 Plug-in Fire Call System First Peacetime Installation

By S. A. Dairies, a . m . i . e . e .

either be at home or at work when their assistance is needed, and consequently it is necessary to consider the manner of inform ing them by the quickest yet simplest m e a n s . A new and somewhat happier lease of life has been given to the 4-H.P. air raid sirens in this connection, especially in rural and sm all urban districts. The siren is usually fitted near the fire or police station; its original contactor and a modified time controller, usually giving a half-m inute “ all-clear ” blast, can be connected and the whole equipment set in motion by the momentary pressing of a push-button. Some small areas are geograph- cially suited to this device, whereas in large towns neces­

Fireman’s alarm relay sitating several sirens a n d calling bell in placed at points chosen carrying case according to prevailing winds its advantage is doubtful in view of the disturbance occasioned •M. number of fire brigade calls to peace­ to a greater number of the public. To the time proportions and has inevitably resulted part-time fireman working, say, in a noisy in the reduction of the num ber of full-time engineering factory the siren would be firemen. But the unknown factors of time, useless, for its note m ight not penetrate to duration, and proportions of outbreaks of his workshop. fire render a stand-by “ pool ” of firemen But when there is a central superimposed vitally necessary. These part-time men will current control system, a “ Rythmatic ”

UVE ¿ LINES PB ( i ) 2 CORE PILOT

MAINS

a - NEUTRAL RC

Circuit diagram of alarm transm itter at central fire brigade station 586 E lectrical R eview October 11, 1946

receiving relay and alarm bell neatly being transmitted, this being finally confirmed installed in a small attache case is an answer by the relay picking up the superimposed to the problem. This unit can be plugged radio-frequency signal from the power mains into any socket outlet from the public network and, in turn, ringing the bell as a electricity supply system at home, in the check back to the fire station control room. factory or office. A small switch on the After receipt of the check-back the bell is relay cover is provided for silencing the bell stopped by pressing push-button PB (2). after a call has been received and the device Automatically RC is shunted down by the is then automatically re-set for its next live line (3). operation. By using such portable relay With the parallel method of injection, if alarms a squad of firemen are simultaneously the fire call signal at 800 c/s (0-54 rhythm) is warned for duty within 20 to 30 seconds of not held up by another signal (say, street the call button being pressed at the central lighting) then the fire station bell is set fire station. ringing within 20 seconds of the button This prompt and efficient method, utilizing being pressed. The maximum possible delay a small control box fixed at the fire station is 1 - 25 minutes, but the chances of such a headquarters, is connected by two pilot wires delay are very remote. The system could to the transmitting equipment at the power well be extended with the availability of station. A diagram of the internal connec­ additional signalling channels and the tions of the control box is reproduced initiating push-button could be duplicated at on the preceding page. the power station as a reserve in case of Push-button PB (1) is momentarily pressed, temporary failure of the pilot cables or fire remote control relay RC locks contacts LC station control gear. and the neon lamp E glows to give visual Acknowledgment is made to Mr. P. G. indication that the signal has been received Campling, chief engineer and general at the transmitter. If for any reason another manager, Bedford Electricity Department, for signal is being sent out, the neon lamp will agreeing to the above information being continue to glow until the “ fire call ” is published.

Intrinsically Safe Apparatus Avoidance of Firedamp Ignition

aspect of rendering the sparking that much less when the working current exceeds accom panies the breaking of a circuit incap­ about 1 A or, in a case of a shunting condenser, able of igniting firedamp is dealt with in a new when the break of the circuit is slow or irregular. Safety in Mines Research Board Paper No. 104 The results reported in this Paper and others to (Stationery Office, 6d. net). The scope of follow it will be used by the testing authorities “ intrinsic safety ” is limited to low-power in the exam ination of m ining electrical apparatus apparatus, such as bells, signalling and shot- submitted by the makers for approval. The firing systems. subject was commented on in the Electrical Tests are, however, still only empirical. Review of October 4th. They pass as safe apparatus when, on repeated trial, “ break ” sparks fail to ignite mixtures of Cable Jointing firedamp and air, but the m argins of safety in series of booklets under the title “ Electrical different circumstances are unknown. This A Knowledge as an Aid to Craftsmanship and the increasing elaboration in electrical in Cable Jointing ” is under preparation by apparatus and circuits have called for a quanti­ Dussek Bitumen & Taroleum, Ltd. They are tative study of the problem in order to create a intended to provide instruction in elementary theory for the “ jointer of to-m orrow ” and to scientific basis. serve as “ refreshers ” for young jointers who The Paper gives the relationship between the have recently been released from the Forces. inductance in a circuit and the minimum The first number, which can be obtained free current that can ignite firedamp when the from the com pany by engineers of supply under­ circuit is rapidly broken between a pointed takings, explains, am ong other things (with the platinum electrode and a wire. The effects of aid of seven diagrams), why a small blob of two methods of increasing the minimum solder left on the ferrule connecting two cables on an a.c. system may cause a breakdown. igniting current have been measured. These This entails considerations o f dielectric strength, are the introduction into the circuit of a shunting magnetic fields, density of charge and kindred resistance or a condenser. They can be of con­ matters which are discussed in simple language siderable value when the inductance is high and that could hardly fail to enhance the interest the current correspondingly low, but the value is of his work to the intelligent craftsman.- October 11, 1946 E l e c t r ic a l R e v ie w 587

ELECTRICITY SUPPLY Development at Bolton. Large Liverpool Rate Contribution.

B attersea.— Change Over. — The Electricity C a r d if f . — Cookers for Steel Houses.— T h e Committee is to e re ct a substation in the Falcon Housing Committee has decided to provide Road district and change over the supply in 250 of the 500 B.l.S.F. houses with electric part of the area at a cost of £33,416. c o o k e r s . Birkenhead.—Oil Fuel Not Favoured.— C h e s t e r .— Supply to Lead W orks. — S a n c t i o n After considering whether the new £7,000,000 has been obtained by the Electricity Committee generating station at Brom borough should be to borrow £2,400 for the provision of a supply run on oil fuel or coal, the Electricity Com ­ to the lead works of W alkers, Parker & Co., Ltd. mittee has recommended the installation of pulverized fuel boilers. Chesterfield. — New Substation. — A s u b ­ station at Stonegravels, the first of several to B lackburn.— M ill Supplies. — Supplying e le c ­ be built in accordance with the undertaking’s tricity to the Canton Mill and giving an improvement scheme, was opened by the chair­ increased supply to the Star W orks, Hart Street, man of the Electricity Committee during the will cost £3,138. annual inspection of the undertaking by the B lackpool.— Eight-Year Scheme.— T h e E l e c ­ C o m m it t e e . tricity Committee has approved in principle an Clyde Valley.— Dearer Electricity. — F o r eight-year scheme of extension costing £270,000 the first time since 1935 the Clyde Valley and is applying for sanction to borrow £143,767 Electrical Power Co. and its associate, the to cover the first stage of the scheme. Strathclyde Electric Supply Co., have been B olton.—Annual Inspection of Under­ compelled to increase their charges. In the t a k i n g . — The chairman of the Electricity case of domestic consumers the advance, which Committee, Councillor Longworth, at the has been sanctioned by the Minister of Fuel annual inspection of the electricity undertaking and Power, will take effect from the accounts last week, said that during the war an extension rendered after January 1st, 1947. Consumers scheme had been completed by the Electricity under the residential and non-residential Departm ent’s ow n staff under the chief engineer, street lighting, etc., tariffs and also the power Mr. H. E. Annett— a creditable performance tariffs are affected. In the case of the first seeing that in a space occupied by a 7,600-kW class of consumer the addition will be 15 per unit they now had a 62,500-kW set. Factory cent, while in the case of consumers subject to consumption had risen from 654 million kW h a coal clause the increase will be 5 per cent on to 87 million, while the consum ption as a whole the basic rates but excluding the coal clause. had risen by 30 per cent. Since the war C o n w a y . — Lower Charges. — The price of 1,112 new consumers had been connected and electricity is to be reduced by Jd. per kW h there were 616 others awaiting connection, on the rateable value tariff, which will now be apart from supplies to housing estates. The 12% per cent of the rateable value and |-d. per Committee had plans for a big transformer kW h consumed. About 3,000 consumers will scheme for the south side of the town, costing benefit. There will also be an all-round reduc­ £144,635, and for new showrooms. During tion of id. per kW h to prepayment consumers. this year there had been an increase of 15 per The total reductions in a full year are estimated cent over last year in consumption and they at approximately £3,600, including the cost of expected a very large load this winter. During discontinuing meter rents. the last eleven years the difference between the grid tariff price and that which Bolton actually C o v e n t r y . — Supply Extensions. — T h e E le c ­ paid to the Central Electricity Board was tricity Committee has approved the provision £224,000. For 1944 the difference was actually of supplies to the Keresley and Binley colliery £52,000. That year the Department made a v illa g e s . profit of £20,000 so if it had been paying the D e r b y . — Power Station Site. — T h e E l e c ­ grid tariff, it would have lost £30,000. Reserves tricity Committee recommends that an option stood at £212,226 and carry forw ard at £225,232. shall be obtained to purchase a site at Swarke- If they could keep these under nationalization stone for a generating station. it would be a good gift to the rates. E p s o m . — Rewiring of Asylum. — T h e r e ­ B r a d fo r d . — Extensions. — The Electricity wiring of the electrical installation at Horton Committee is to extend mains and erect a sub­ Asylum is to be completed by the London station in Ingleby Road at a cost of £10,688. County Council at a cost of £7,000. An additional supply is to be provided to Barkerend Mills Co., Ltd. (£12,734) The Liverpool.— £50,000 Rate Contribution. — distribution system is to be extended to the Cow The Electric Supply Department reports that Close district, W yke (£1,410) and to W oodhouse on the working of the undertaking for the year Hill and Greenfield Lane, Bierley (£1,403). to March 31st last there was a surplus of Municipal Contracting. — The borough £79,317, of which it is proposed that £50,000 electrical engineer has been instructed to make shall be transferred to the general rate account. arrangements for the establishment of an The final reckoning is m uch better than had been electrical contracting section. anticipated, ow ing partly to greater sales. S t r e e t L i g h t i n g . — Electric street lighting is At last week’s meeting of the City Council to be provided at Eccleshill estate (£2,037), the recommendation to transfer £50,000 to the Buttershaw (£2,060) and Clayton (£1,746). rates was opposed by Councillor J. Johnstone. 588 E lectrical R eview October 11,1946

He said that it was the wrong moment to put hotels, farms, offices, ambulance centres and the profits to the relief of the rates when the workshops), 15s. a quarter. Large business city electrical engineer had reported that, ow ing premises and public buildings, 25s. a quarter. to increasing costs, further increases in charges Domestic premises: From 10s. a quarter for to consum ers would appear to be inevitable. the smallest premises to 14s. a quarter for the Alderman A. Critchley, chairman of the largest. The running charge is being reduced Electricity Committee, replied that they were in by 25 per cent as from October 1st. the position of having to do their best with the P r e s t o n . — Extensions. — The Electricity Com ­ undertaking in the short time at their disposal. mittee proposes to extend mains to Calder The Committee could spare £50,000 for the Vale, Back Lane, Garstang, etc. relief of rates and they took the view that they must think of Liverpool as a whole. Personally Richmond (Yorks).— R e b a t e . — A 20 per cent he would not have been opposed to devoting rebate has been given to electricity consumers the whole £80,000 to the rates, because there for the quarter ended September 30th. was no question about it that in negotiating S a l f o r d . — Domestic Apparatus. — The Light, with the Government on taking over the Heat and Power Committee is seeking sanction undertaking they would not get one penny to borrow £10,000 for domestic electrical piece consideration for that £80,000. The appliances. reference back was defeated by 60 votes to 41. Stafford. — Higher Charges. — Increased Coal Wagons. — The Electric Power and charges for electricity as from the last reading Lighting Committee has obtained sanction of the meters for the December quarter were to borrow £25,450 for the purchase of fifty adopted by the Tow n Council last week, subject 20-ton steel hopper coal wagons. to the approval of the Electricity Commissioners. Llandudno.— Undertaking’s Finances. — T h e Alderm an C. H. Merrey, presenting the report, Council’s electricity undertaking showed a loss said that “ all-in ” tariff consumers had been of £3,847 for the year ended March 31st last. getting electricity at less than its cost to the Capital expenditure for extensions of mains, Corporation, and that position m ust be remedied. changing the system of voltage, and new S w in d o n . — Economy Appeal. — T h e T o w n developments during the next two years is Council decided at its October meeting to appeal estimated at nearly £20,000. to the Great Western Railway Company to L o n d o n . — Pumping Plant. — The London exercise strict econom y in the use of electricity County Council is to reorganize the pumping at the locomotive and carriage works at plant at the Southern Outfall works at a cost of Swindon. An appeal to economize as much £180,000, and the Health Committee proposes as possible was also made to the general public. to install four electrically driven pumps in Figures given showed that the present load is place of the existing steam driven pumps. It is distributed as follow s :— Dom estic and industrial anticipated that this will result in a saving in lighting, 21 per cent; heating and cooking, maintenance costs of £15,000 a year, m ainly in 53 per cent; industrial power, 25 per cent; respect of coal and oil fuel. and public street lighting, 33 per cent. Manchester. — Load Development in Wolverhampton.— System Developments.— Southern Area. — To meet load development For cable and switchgear extensions on the in South Manchester the transformer capacity north-west side of the town the Electricity at the M oss Side substation, between the 33- Committee proposes to apply for permission and 6-6-kV systems, is to be increased. It is to borrow £90,693. It also recommends that proposed to install a 10,000-kVA transformer negotiations shall be entered into with the West and carry out various modifications to enable M idlands J.E.A. for a third prim ary substation, the station to be remotely controlled from the probably at Codsall, and that approval be given central control room. The estimated cost is in principle to the establishment of a 33-kV £ 1 4 ,5 0 0 . s y s t e m . Midhurst. — Cheaper Electricity. — A t a meeting of the Rural District Council it was TRANSPORT reported that the Mid-Southern Utility Co. proposed to make a reduction in electricity Darlington.— Double-Deck T rolley-buses. charges as from the reading of the meters for the — The Town Council is being recommended to current quarter. The war increase of 10 per order six double-deck trolley-buses. The cent was to be abolished and the differential Council at present uses only single deckers and flat lighting rate in the outer areas reduced by if double deckers are used generally, it will be ^d. per kWh. After the publication of the necessary to lower the roadway under certain company’s accounts for 1946 negotiations bridges to make room for the vehicles. would be continued for further reductions. Neweastle-on-Tyne.— New Service. — T h e C it y Newcastle (Staffs).—Supply to Brickworks. Council proposes to institute a trolley-bus — The Electricity Committee is applying for service to the new headquarters of the Ministry consent to the borrow ing of £1,060 for supplying of National Insurance at Benton. The Gosforth electricity to the Apedale Brickworks of Urban District Council has approved the City T. W. Ward, Ltd. Council’s plans for a trolley-bus turning point at Henry Street, but has suggested an alternative Pontardawe. — Standardized Fixed Charges- site for the turning point in Hollyw ood Avenue. — It is interesting to learn from Mr. Russell M. Jenkins, electrical engineer and manager, that New Zealand. —Conversion to Trolley­ the Rural District Council has decided to b u s e s .— The City Council has adopted proposals standardize the fixed charge component of the to convert the tram ways to trolley-bus operation. two-part tariff. The following charges will be The total cost, including road restoration, is made:— Small business premises (schools, put at £739,780. October 11,1946 E l e c t r ic a l R e v ie w 589 L a m | » 1* n 1» I ic i t y —111 Attractive New Sales Aids

•1TANY new items have been added to the artist, are also available, as well as large and 1TB existing lamp display material of E. K. small window stickers, streamers, price lists Cole, Ltd. Main poster sites throughout the and dummy lamp cartons for general display country are again carrying the “ Ekco ” lamp purposes. Assisted advertising in local news­ papers will still be considered by the company for aiding dealers, while coloured cinema slides complete with the dealer’s name m ay be obtained on request. An information service for answer­ ing dealers’ technical inquiries is proving very popular. The recently opened “ Ekco ” London office at 5, Vigo Street, W. 1, carries its own lighting division staff, with Mr. E. S. Evans, southern area lighting sales manager, and Mr. F. L. Cator, lighting engineer. The “ Ediswan ” lamp publicity of the Edison Swan Electric Co., Ltd., includes several attractive window displays. The standard display, “ Decorate with Light,” features a well-lighted building, printed in colours. Other displays invite the passer-by to “ G e t all the light you pay for ” and to “ Make the most of your Royal ‘ Ediswan ’ Lamps.” The same theme runs through the national and electrical press advertising, with such additional hints on good lighting as “ If that lamp were lower down you would not need to peer and frown,” “ If that lam p were overhead you’d get more light to read in bed,” and “ Homework started ? What a pity the lamp’s too far from George and Kitty.” The familiar “ Ediswan ” lamp road signs and bus streamers are being continued, with the addition of a 16-sheet poster on sites at Underground stations. Several new designs take their place in the Eleven-colour “ Ekco” lamp cut-out

slogans. Sales-aids now available include am ong other items a 22 in. by 15£ in . e le v e n - c o lo u r cut-out with an attrac­ tive girl as the main feature, two nine-colour cut-outs 12£ in. by 10J in. (one featuring a “ Schoolboy ” design andthe other a “School­ girl ”), and tw o varieties of the “ Mr. Bright ” cut-out m easuring 1 3 in . by 10 in. for use with dummy lamp cartons. A particularly attractive Standard “ Ediswan ” window display cut-out is the “ Ekco ” name unit, a concertina type display piece with range of dealer aids of Ensign Lamps, Ltd., for six panels opening to 22J in. by 1 \ in. the new lighting season. A particularly bright New posters, including a five-colour “crown” ten-colour centre piece cut-out measuring 29£ in. by B r u c e A ngrave, the well known commercial by 19 in. featuring the “ Ensign ” is one of the 590 E l e c t r ic a l R e v ie w October 11, 1946

main display items. For counter or window use ments themselves stress the fact that Philips a sm aller six-colour cu.t-out has been devised in have been making good lamps for over fifty four planes which can be extended concertina years. A lamp is shown in halves with a big query m ark between them. The “ copy ” asks “ What’s inside ? ” and the answer given is “ Over half a century’s experience.” Other layouts show variations on the same theme. Relaxation, in part, of paper control makes possible the introduction of an entirely new poster design to replace the flag poster which served so well during the war. It will appear throughout the London Underground system in 16-sheet size for wall display opposite plat­ forms, 60 in. by 40 in. for special positions and in 22^ in. by 16Jin. size for escalator panels. For dealer and sales aids a wide range of display pieces has been designed. Window centre-

ENSIGN ( > LAMPS

Ensign centrepiece cut-out fashion to 9| in. deep by 11 in. wide and fixed by a simple slot arrangement. Window bills include a four-colour 12 in. by 8 in. design with gummed face. There is also a striking new crown poster in five colours. Cinema slides incorporating the dealer’s name and address are also available. The lamp campaign of Philips Lamps Ltd. will follow the same pattern as that for 1945-46 in view of the successful results derived there­ from. Country - wide newspaper coverage, centred on the areas of greatest population density, will ensure that practically every section Philips counter showcard of the public will see these advertisements continuously throughout the lighting season. pieces, pelmets, showcards, counter cut •outs, a a Jusj Advertisements will also appear in the trade new counter “ m erchandiser ” and a new general ttippj press and popular magazines. The advertise­ lam p catalogue will be available. as of fit S ad te Selfridge’s Electrical Exhibition ■Bgihe

A N excellent display of modern domestic does them credit. A few examples of commercial “ Mi .rm. electrical equipment has been got together apparatus are to be seen and in this section is ®sdsi[ by Selfridges, Ltd., at its O xford Street establish­ displayed a clever model of a 30,000-kW ; ment. The company says that its object in English Electric turbo-generator set and *6eirw arranging the exhibition was twofold:— To auxiliaries installed at the Little Barford l demonstrate how successfully British manu­ s t a t io n . ' facturers are reconverting their industry to M iss Caroline Haslett, C.B.E., in opening jn, , meet peacetime needs, and to show the com­ the exhibition on October 2nd, praised the I pany’s determination to provide the public only manufacturers for producing such high quality ^ 4, with safe appliances of the highest quality. goods and the company for its enterprise in a^ The exhibition has been arranged in sections organizingo r e a n iz in e susuch c h a crnoHgood andanH representative fcr,.1 *1 devoted respectively to cooking equipment, display. M r. E. G. Batt, thanking M iss Haslett, ¡a room heating appliances, refrigerators, washing expressed appreciation of Selfridge’s policy of ' “ machines, water heaters, lighting fittings and dealing only in sound and reliable apparatus. small appliances. M any of the leading manu­ The exhibition is to remain open to the public *>1 Iti facturers are represented by equipment which throughout October. *5cat Hied i) October 11,1946 E l e c t r ic a l R e v ie w 591 FDiMCIAL SEKTION Company News. Stock Exchange Activities.

The capital amortization fund receives £5,477 Reports and Dividends (same), plant renewal and depreciation account Telephone Rentals, Ltd.— Dealing with the £30,000 (£22,500), and contingency account accounts in his address at the annual meeting, £5,000 (£2,500). The dividend on the ordinary Mr. F. T. Jackson (chairm an and joint m anaging shares is 6 per cent (against 5 per cent) and director) referred to the inauguration of a £20,408 (£13,291) is carried forward. profits participation scheme for employees. Rawlings Bros., Ltd.— The net profit for the He said that the broad basis of the scheme they year ended March 31st last, including a profit had put into force was that, subject to certain of £2,280 on realization of investment, was specific conditions, an employee’s salary would £9,648, as com pared with £7,261 for the previous be considered to be his or her investment in the year. The ordinary dividend for the year is company and would entitle the participant to unchanged at 1 \ per cent and the balance receive a dividend on that amount, less tax, carried forward is £5,438, as compared with at the same rate as dividends to shareholders. £4,348 brought in. A notional increase would be added to the J. & F. Stone Lighting & Radio, Ltd., reports capital sum every three years of continuous profits, before taxation, of £265,669 for 1945-46, service to provide an incentive to employees as compared with £132,692 for the preceding to make their careers with the company. The year. The final dividend is 30 per cent, m aking cost on the accounts am ounted to £17,824. 40 per cent for the year (against 15 per cent for Giving details of the company’s progress, 1 9 4 4 -4 5 ). the chairman said that the percentage increase in new business in the twelve months ended The Watford Electric & Manufacturing Co., September 30th, 1946, over 1938 was 212 and Ltd., is again paying an interim dividend of compared with 1945 the increase was 193 per 5 per cent. cent. These figures indicated that the com pany The British Electric Transformer Co., Ltd., has was progressing at a great rate and could look raised its interim ordinary dividend from 10 to forward to a successful future. The chief 40 per cent. difficulty lay in the lack of equipment; their The Calcutta Tram ways Co., Ltd., has declared manufacturers were in some instances nine to a dividend of 10 per cent for 1945, as com pared 1 twelve m onths behind in deliveries. w i t h 1\ per cent for 1944. The proposals submitted at the previous Pinchin, Johnson & Co., Ltd., are raising their 1 annual meeting for the merging of nearly all nterim dividend from 21 per cent to 5 per cent. ; the subsidiary companies had been carried through successfully and the new organization was already proving m ore efficient. New Companies The Engineering and Lighting Equipment Co., Diamond Bros. (Manchester), Ltd.— Registered Ltd., held its annual meeting on September September 25th. Capital, £2,500. To acquire 30th, Mr. S. A. Marples presiding.' The chair- the business of manufacturers of electrical k man, in his statement circulated with the equipment and household fittings, carried on by accounts, said that in regard to naval require­ W. & H. Diamond as Diamond Bros, at 50, ments there had been delay in form ulating new Thom as Street, Manchester, 4. Directors: W. ' type equipment since the war ended and a Diam ond and H. Diamond. Regd. office: 50, certain hiatus had therefore supervened in this Thom as Street, Manchester, 4. major department of the company’s manu­ Modern Electrical Industries (Export), Ltd.— facturing business. The demand for street Registered September 11th. Capital, £100. lighting equipment remained to a great extent Manufacturers and repairers of, and dealers in, dependent on the fuel situation, but very large electrical and mechanical appliances and quantities of fittings were on order for housing accessories, etc. Directors: W. J. Read, A. schemes and new installations for trunk roads. Read, J. D. Macnee and D. G. Jones. Regd. Addressing the meeting the chairm an said that office: 9, Hatherley Road, Sidcup, Kent. while the prospects were good the labour and P. A. Robinson (Electrical) Co., Ltd.— materials position was against them. With Registered September 23rd. Capital, £2,000. an increased supply of m aterials and the labour Electricians, electrical and m echanical engineers, situation settled down they should be able to welders, radio engineers, etc. Subscribers: get near their w artim e position. J. Bowm an and J. Campbell. Solicitors: M orris The Ransome & Maries Bearing Co., Ltd., J. Hart Leverton, 65, Bishopsgate, E.C.2. records a net profit for the year to June 30th Wakeling Electrical Co., Ltd.— Registered of £127,371, as compared with £123,227 for Septemhir 19th. Capital, £1,000. Manu­ 1944-45.’ General reserve receives £50,000 and facturers of, and dealers in, electrical and allied the dividend for the year is maintained at 20 apparatus, etc. Subscribers: G. L. Quirk, 68, per cent by the final payment of 12J per cent. Priestland Park Road, Sidcup, and J. D. The balance carried forw ard is £83,361 (against Vanstone, 15, Arnos Grove, N.14. Secretary: f £83,365 brought in). J. D. Vanstone. The Jerusalem Electric & Public Service Cor­ Seagull & Brown, Ltd.— Registered September poration, Ltd., records a net profit, after tax, 10th. Capital, £1,000. To acquire the business for the year ended M arch 31st last of £P63,719, of a radio and electrical engineer, etc., carried compared with £51,605 for the previous year. on by Jesse H. Seagull at Cuxton Road, Strood, 592 E l e c t r ic a l R e v ie w October 1946

Rochester, Kent. Permanent directors: J. H. receiving sets, engineers, etc. Directors: C. V. r Seagull and M. A. Brown. Regd. office: 35, H. Clayton and J. W. Shepherd. Secretary: H igh Street, Chatham. J. W . Shepherd. Regd. office: 77, Shirley Road, " Eltham Electrics, Ltd.— Registered September C r o y d o n . 10th. Capital, £1,000. Manufacturers of, and Creed & Southern (Electric Signs), Ltd.— dealers in, electrical apparatus, radio and tele­ Registered September 19th. Capital, £100. s: vision equipment, etc. Directors: C. F. Manufacturers and repairers of, and dealers in, . Brouncher, J. W. T. Hartnell and E. W. Rey­ neon advertising and lighting signs, equipment, 01 nolds. Secretary: C. W. Chivers. Regd. etc. Directors: F. J. Creed and F. J. Southern. - office: 112, W estm ount Road, Eltham , S.E.9. Regd. office: de Burgh Works, Station Road, West Drayton, Middlesex. Edinburgh Factors (Electric), Ltd.— Registered in Edinburgh September 21st. Capital, £5,000. F . . M . P . Electric, Ltd.— Registered September Fittings and spare parts and all electrical and 20th. Capital, £2,000. Manufacturers of, and W mechanical equipment and accessories for m otor dealers in, electrical apparatus, etc. Directors: and other vehicles. Directors: A. Pratt and A. H. Harrison and I. E. Humphreys. Regd. M. Pratt. Regd. office: 37/39, St. Patrick office: Bartholomew Works, Kentish Town, Square, Edinburgh. N . W . 5 . foil H . J. & S. Products, Ltd.— Registered October Chingford Electrical Co., Ltd.— R e g iste re d 1st. Capital, £1,000. Manufacturers of, and September 27th. Capital, £500. To carry on ®s dealers in, domestic, household and general the business indicated by the title. Directors: irod electrical and other equipment and appliances, J. J. Barry and A. E. Johnson. Regd. office: .j, including washing and cleaning machines, etc. 94a, Station Road, Chingford, E.4. Subscribers: G. C. Humphreys and P. H. W. & H. Electrical Co., Ltd.— Registered (J Johnson. Regd. office: 14, Wright Street, September 10th. Capital, £1,000. Electrical O l d h a m . engineers and contractors, etc. First directors: Southall Electrical Engineers, Ltd.— Registered M. M. A. Wise and H. T. F. Harrison. Regd. ^ September 20th. Capital, £100. Manufacturers offices: 337, Kenton Road, Kenton, Middlesex. of, and dealers in, electrical and mechanical apparatus and accessories, wireless, etc. Companies Struck Off the Register Directors: J. H. Thomas, R. F. S. H o w e l l a n d The names of the following companies have |[ll Alice Thomas. Regd. office: 47, King Street, been struck otf the Register and they are thereby S o u t h a ll . dissolved:— British Automatic Telephone In- im I William Henry Smith & Son (Grays), Ltd.— stallation Co., Ltd.; Neon Lights, Ltd.; “ Sel- „ Registered September 20th. Capital, £1,000. Ezi ” Wireless Supply Co., Ltd.; Vacuum Light ___ Electrical and wireless engineers, etc. Directors: & Power Ltd.; Vacuum Power Ltd. W. H. Smith and Mrs. Q. D. Moriarty. Regd. office: 1, Kingston Parade, Hathaway Road, Grays, Essex. Liquidations Electro Mains (Hertfordshire) Ltd.— Registered Contraflo Engineering Co., Ltd.— M e e t in g September 26th. Capital, £1,000. Electrical October 29th, at the offices of G. & J. Weir, and radio engineers, etc. Directors: T. H. Rice, Ltd., Holm Foundry, Cathcart, Glasgow, S.4, K. W. J. Rice and W. G. B. Younger. Regd. to receive an»account of the winding-up by the office: 411, St. Albans Road, Watford. liquidator, Mr. J. Davidson. E . H. Bullock & Son, Ltd.— Registered Septem­ ber 26th. Capital, £1,000. To acquire the Bankruptcies business of an electrical engineer carried on by A . J. Barlow, 9, Brunsw ick Place, City Road, E. H. Bullock at 73, East Street, Farnham. London, electrical and general engineer (trading E. H. Bullock is the first director. Regd. office: as Barlow Brothers).— Application for discharge 73, East Street, Farnham . to be heard on October 17th at Bankruptcy Itonia Co., Ltd.— Registered September 26th. Buildings, Carey Street, London, W.C.2. Capital, £1,000. Electrical engineers and con­ J. Eisner, J. Sunshine, B. Rome a n d T. Otaki, 1 tractors, etc. Directors: G. E. Bilantz and trading in partnership under the style of the O. E. Bond. Regd. office: 72, Brondesbury Lloyd Electric Lam p Co., 8, Rangoon Street, Park, N.W .2. London, E.C.3, and lately of 4, Lloyd’s Avenue, Neon (Portsmouth) Ltd.— Registered Septem­ London, E.C., wholesale electrical accessories t ber 16th. Capital, £1,000. Manufacturers of, dealers. (Separate application of J. Eisner).— and dealers in, neon signs, advertising and other Application for discharge to be heard on October signs, etc. Directors: A. P. A. Mortimer and 15th at Bankruptcy Buildings, Carey Street, A. J. Smith. Regd. office: 43, Ophir Road, London, W .C.2. Portsmouth. W . S . P oole, electrician, residing and carrying Baths Batteries & Autocessories, Ltd.— on business at H igh Street, Queensbury, near Registered September 11th. Capital, "£1,000. Halifax.— First and final dividend of 20s. in the Buyers and sellers, repairers and manufacturers £, and 4 per cent statutory interest, payable of, and agents for the sale of, electrical and other October 16th at 71, Manningham Lane, Brad­ goods, etc. Directors: C. N. Bath, I. J. Fraser f o r d . and F. E. Langridge. Regd. office: 3a, Helling- S . H an co ck , electrical engineer, carrying on ton Parade, Chislehurst, Kent. business as S. Hancock & Co., at Clyde Street, Clayton & Shepherd, Ltd.— Registered Septem­ Holt Town, Manchester.— Application for dis- y ber 11th. Capital, £1,000. Dealers in, and charge to be heard on October 28th at The manufacturers of, wireless transmitting and Court House, Quay Street, Manchester. October 11,1946 E l e c t r ic a l R e v ie w 55 CONTROL

OF IMPORTANCE TO YOU In order that we may give you the best service under the present difficult conditions we appeal to you to utilise standard equipment; avoid “ frills ” whenever possible. Your co-operation in this respect will enable us to concentrate on standard production with consequent reduction in despatch time. USE “STANDARD”

A IR B R E A K ROTOR AND STATOR'STARTER

Sales BRETTENHAM HOUSE VERITYS L td .•9 Headquarters : LANCASTER PLACE, W.C.2 W orks: ASTON, BIRMINGHAM 6

THREE MODELS: 1. “ MILL T Y P E ” 2. “STANDARD” 3. “ BLOW-ER CLEAN ”’

The most efficient, light weight, portable blowers ever built. Martip- dale Super Blowers are precision built, and carefully balanced to eliminate vibration. Armatures, windings and field coils are impregnated to withstand use in tropical climates and under the most exact­ ing industrial conditions.. W rite for particulars Martindale Super Blowers are guaranteed for twelve months against faulty workmanship and material. MARTINDALE ELECTRIC CO LTD., W ESTMORLAND ROAD, LONDON, N.W.9 Phone Colindale 8642. Grams : ' Commstones, Hyde, London.” w er a t c THE ISO-SPEEDIC COMPANY LTD. • COVENTRY«. v a Telephone : Coventry 3147 Telegrams : " Isospeedic, Coventry’* October 11, 1946 E l e c t r ic a l R e v ie w 593 STOCKS AND SHARES to 46s. 3d. Other weak features are Reyrolles at 75s. and Revo at 52s. Dividend news con­ ^ JILT -E D G E D securities have maintained a trasts cheerfully with the state of markets. firm front during the past week, but in the Biitish Electric Transformer, controlled by industrial and more speculative markets many Crom pton Parkinson, have raised their interim prices lost further ground before the appearance dividend from 10 to 40 per cent. J. & F. Stone, of effective resistance to the drift which began the lighting and radio retailers, are paying a a month ago. The m oral effect of W all Street’s total of 40 per cent for the year, against 15 per relapse is still an influence. M arkets reflect also cent for the previous period. some pre-occupation with the possibility of a coal shortage serious enough to hamper pro­ Shares on Offer duction over a wide field. In the electrical equipment market a line of Signs of returning confidence are encouraged Telephone Manufacturing 5s. ordinary shares is bv the underlying support of the cheap money on offer at 13s. 6d. On the dividends of 9 per policy, which keeps gilt-edged stocks firmly cent paid consistently for many years the yield maintained on a 2J per cent yield basis, and by works out at £3 6s. 8d. per cent. E.P.T. relief a succession of good reports and dividends. should be of substantial benefit to the com pany; Conspicuous in the dull conditions prevailing last year this tax took more than half of the in most sections of the industrial markets has trading profit of £411,000. A return of £4 been the firmness of electricity supply com­ 17s. 3d. per cent is offered on New m an Industries panies’ shares and those in other industries 2s. ordinary shares, which are in the market earmarked for nationalization. Railway stocks at 9s. 3d. Distributions of 22\ per cent have been are inclined upwards, and coal shares hold their made for the last two years, following a long ground firmly. Various considerations lend succession of 20 per cent payments. An in­ their support to prices. Yields are relatively crease of capital is intended. Peto Scott generous. On electricity supply shares the Electrical Instruments 2s. ordinary shares are average is about 4-J per cent. Dividends are offered at 11s. to yield £4 11s. per cent on the considered likely to be at least m aintained while 25 per cent dividend paid in each of the last two the companies remain in private hands, and m ay years. Lancashire Dynamo £1 shares can be even be improved. bought at 112s. 6d. to provide a round 4 per cent on the money. S Market Valuation

At current share prices the assets of many Radio Dividends i of the companies on the nationalization list are Decca Records’ financial year ended in March. ; capitalized in the m arket at figures which look The interim dividend was maintained at 33^- 3 moderate in relation to the terms which could per cent; the final is due. Last year’s total I be expected under reasonably just com pensation distribution came to 112£ per cent. Apart 3 schemes. Further, with the span of private from dividend anticipations, dealings in the Is. S ownership perhaps limited, according to official shares have lately been enlivened by reports a intentions, to the life of the present Parliament, of an American subsidiary to be formed for S shareholders are less concerned with the long- the operation of the Decca Navigator system in 3 term considerations which exercise minds in that country. On this news the price of the ■ other sections of the industrial markets. After shares advanced by as much as 6s. 3d. to 60s. ■ another difficult week there is scarcely a change in the course of a day, but m ost of the im prove­ ■ worthy of mention in the price list of electricity ment was subsequently lost. At 55s. the yield I supply shares. Cable and Wireless stocks are on last year’s distribution is only 2 per cent. I steady, while in the Home Railway market Preference Shares ■ Southern preferred, at 71£, and the 5 per cent ■ preference, at 110£, are each a point to the good. The shortage of good debenture and preference investments has become accentuated by the un­ I Equipment and Manufacturing certainties. In the electrical equipment market, Despite a late rally, the week’s losses in British Insulated Callenders 5| per cent prefer­ In electrical equipm ent quotations have again been ence shares are on offer at 30s., to yield £3 f| numerous and of some substance. Am ong the 13s. 3d. per cent, and the senior 6 per*cent issue Fa market leaders, General Electrics have dropped at 33s. 3d. to yield Is. per cent less. A small Q Is. 9d. to 94s. 6d. English Electrics at 59s. 6d line of Henley’s 4j per cent preference is avail­ H and Crom pton Parkinsons at 29s. 6d. have lost able at 26s., the yield being just under 3J per I Is. each, but Associated Electricals are steady at cent. English Electric 3£ per cent preference at 1 66s. 6 d ' Enfield Cables shed 2s. to 54s. 6d. and 23s. and General Electric 4} per cent preference ■ Johnson & Phillips Is. to 79s. E.M.I. shares at 25s. 3d. can be bought to pay about 3J per £1 eased further to 28s. 6d. in advance of the cent on the money, and demonstrate the per­ Hdividend due this month. Radio & Television sistent popularity of the lower-priced shares. ■ are lower at 9s. and A.C. Cossors have eased to Am ong electricity supply shares, Yorkshire .. 31s 6 d Vactrics are no better than 13s. after Electric and North Metropolitan 6 per cent NTS fal|j another 3s. 3d. British Vacuum Cleaner preference give a yield of 4| per cent at the on:are down to 25s. 3d. and Crabtree Electrical offered price of 28s. 6d.

D t 594 E l e c t r ic a l R e v ie w October 11,1946

\K\V PATENTS Electrical Specifications Recently Published

The numbers under which the specifications will be J. E. Salthouse.— “ Systems for supplying elec­ printed and abridged are given in parentheses. tric current impulses suitable for welding.” Copies of any specification ( I s . each) may be 1028. January 19th, 1944. (580854.) obtained from the Patent Office, 2 5 , Southampton A. F. Fekete.— “ Electrical accessories.” Buildings, London, W.C.2. 3605. February 26th, 1944. (580693.) BA U M A N N and Metropolitan-Vickers G. S. P. Freeman.— “ Electron discharge and •Electrical Co., Ltd.— “ Turbines, turbine like devices including members disposed within K closed housings.” 13625. August 30th, 1940. type compressors and like rotating machines.” (5 8 0 8 0 3 . ) 5954. M ay 7tK, 1941. (580805.) General Electric Co., Ltd., and L. C. Jesty.— Belling & Lee, Ltd., and C. W. Heath.— “ Arrangem ents com prising cathode-ray tubes.” “ Electric cartridge-type fuses or resistances.” 12968. September 14th, 1942. (580730.) 21770. November 6th, 1944. (580759.) General Electric Co., Ltd., D. E. Jones, C. E. Bendix Aviation Corporation.— “ Electrical means for reproducing motion.” 144/44. Ransley, J. W. Ryde and S. V. Williams.— “ Crystal contacts of which one element is August 25th, 1942. (580850.) K. E. Beswick.— “ Cartridge fuses.” 7768. silicon.” 3375/43. M ay 6th, 1942. (Divided •« out of 6118/42.) (Addition to 577181.) (580683.) M arch 27th, 1945. (580719.) British Insulated Cables, Ltd., G. W . Robb, J. S. Gerber and W . D. Redfern.— “ Apparatus i l l for electrically stirring or circulating electrically- J. Holland and C. Fletcher.— “ Electric current ■lût collectors.” 21720. November 6th, 1944. conducting m olten or liquid materials.” 1666/7. (5 8 0 7 1 7 .) January 28th, 1944. (580852/3.) British Thom son-Houston Co., Ltd.— “ Radio A. A. Griffith.— “ Compressor, turbine and frequency transformers.” 13904/44. July 21st, like blades.” 6533. M ay 21st, 1941. (580806.) 1943. (580782.) “ Fusion welding.” 17014/44. M. E. Haine and Metropolitan-Vickers September 13th, 1943. (580794.) “ Electric Electrical Co., Ltd.— “ M eans for the generation discharge lamps.” 19849/45. March 26th, of recurrent square waveform voltages of short 1942. (Divided out of 580406.) (580839.) duration.” 432. January 8th, 1943. (580844.) British Thom son-Houston Co., Ltd. (General W. T. Henley’s Telegraph W orks Co., Ltd., Electric Co.).— “ Gaseous discharge devices.” H. A. Tunstall and W. F. O. Pollett.— “ Manu­ 5387. March 22nd, 1944. (580765.) facture and use of plastic com positions.” 1538. «“Cm British Thomson-Houston Co., Ltd., and February 5th, 1942. (580729.) §úlk D. S. Morfey.— “ Cam mechanisms.” 9137. O. E. H. Klemperer.— “ Electron discharge M ay 12th, 1944. (580770.) devices having means for generating an electron beam of elongated cross-section.” 2927. British Thomson-Houston Co., Ltd., and K February 16th, 1944. (580762.) J. E. Stanworth.— “ Soft glass compositions.” sforVi Landis & Gyr. Soc. Anon.— “ Electro- 6856. March 19th, 1945. (580873.) «mlier L. F. Broadway.— “ Cathode-ray tubes and magnetically operated electric switch.” »O ll circuit arrangements embodying such tubes.” 13721/44. September 28th, 1943. (580703.) W ill 4448. March 9th, 1944. (580860.) J. Lucas, Ltd., C. H. Allen and H. E. Lardge. u i H. B. Brown, C. M . Sayer and Metropolitan- — “ Electrical welding machines.” 6952. Vickers Electrical Co., Ltd.— “ Braking equip­ March 20th, 1945. (580835.) ment for rotable members.” 4529. March Marconi’s Wireless Telegraph Co., Ltd.— 10th, 1944. (580861.) "R a d io antennae.” 1587/44. January 27th, aedcabl Cambridge Instrument Co., Ltd., and M. C. 1943. (580750.) “ Piezo-electric crystal dis- Marsh.— “ Instrument suspension systems.” criminator circuits.” 2854/44. February 16th, 9471. July 25th, 1941. (580680.) 1943. (580815.) J. Collard.— “ High frequency impedance M arconi’s Wireless Telegraph Co., Ltd., and 1111 transformers.” Cognate applications 16164/43 G. L. Grisdale.— “ Electric oscillation gener-“ and 21250/43. October 1st, 1943. (580810.) ators.” 8706. May 8th, 1944. (580824.) «4- H. Davies.— “ Sound recording.” 12524. M -O Valve Co., Ltd., and C. E. Ransley.— fL Mi June 30th, 1944. (580697.) “ Sound recording “ Manufacture of wire consisting mainly of *®, t and reproducing apparatus.” 12525. June nickel.” 16501. October 8th, 1943. (580744.) ®UV 30th, 1944. (580698.) H. N. Negretti, P. E. Negretti and H. S. C. T. Drummond, Ltd., C. T. Drummond Gregory.— “ Measuring device applying radio-^.-Oi and A. L. Orchard.— “ Washing and cleaning meter action,” 14006. July 21st, 1944. Paper-i machines.” 21382. December 21st, 1943. (5 8 0 7 8 4 . ) (5 8 0 7 4 9 .) T. Nelson.— ‘ Stud welding machine.”*,., Dunlop Rubber Co., Ltd., and H, W. 13709. July 18th, 1944. (580702.) U w Trevaskis.— “ Electric connection device of the D. A. Oliver and W. Jessop & Sons, Ltd.- _ plug and socket type.” 6224. April 4th, 1944. Permanent m agnets for the control of electric.“'r % t . - (5 8 0 8 2 1 .) oscillating systems.” 17059/40. December:.1 B. J. Edwards and Pye, Ltd.— “ Radio­ 24th, 1941. (580840.) I location apparatus.” 13133. August 13th, W . Sharp.— “ Snap-action electric switches.”;! „ ?' 1943. (580687.) 13687. July 18th, 1944. (580701.) Electric Panels, Ltd., W . N. M ann and O. W. S i e m e n s B r o s . & C o . , L t d . , a n d D . P. L o n g . — 1fcidgi M inshull.— “ Electric heating systems for build­ "Autom atic telephone systems.” 19077,^ ligh ings.” 13858. July 19th, 1944. (580709.) October 5th, 1944. (580828.) Boro- English Electric Co., Ltd,, G, Chadwick and D. M, Smith and Metropolitan-VickeAret October 11, 1946 E l e c t r ic a l R eview 595

Electrical Co., Ltd.— “ Gas compressors.” mission lines.” 20396. December 6th, 1943. 5955. M ay 7th, 1941. (580841.) (5 8 0 8 1 2 .) Standard Telephones & Cables, Ltd.— Standard Telephones & Cables, Ltd., P. K. “ Fluorescent screens for cathode-ray tubes." Chatterjea and L. \V. Floughton.— “ Secrecy ’136/44. February 10th, 1943. (580856.) communication systems." 16378. December Standard Telephones & Cables, Ltd. (Inter­ 18th, 1941. (580843.) national Standard Electric Corporation).— Standard Telephones & Cables, Ltd., P. K. " Electric wave generators." 10684. June 2nd, Chatterjea and C. T. Scully.— “ Pulse signalling 1944. (580773.) systems.” 8300. M ay 2nd, 1944. (580769.) Standard Telephones & Cables, Ltd., and Standard Telephones & Cables, Ltd., J. R. W. A. Beatty.— “ Generation of short electric Hunt and F. Abbott.— “ Sealing electric con­ pulses.” 3621. February 27th, 1940. (580801.) ductors through a glass envelope and to electric Standard Telephones & Cables, Ltd. (trading conductors for such purpose.” 19173. as Stanelco Products), and J. Handley.— November 17th, 1943. (580746.) “ Electric soldering apparatus.” 14303. July L. Tronstad.— “ Method for the electrolytic 26th, 1944. (580790.) preparation or concentration of heavy water.” Standard Telephones & Cables, Ltd., and 14350. July 27th, 1944. (580791.) C. T. Scully.— “ Signal transmission system G. Turnock, Ltd., E. D. Jackson and W. E. employing phase or frequency modulation.” Taylor.— “ Electrical plug connectors having 6589. April 23rd. 1943. (580738.) cable grips.” 11187. June 12th, 1944. Standard Telephones & Cables, Ltd., and (5 8 0 7 7 5 .) J. D. Weston.— “ Radio altimeters.” 5207. Western Electric Co., Inc.— “ Sound recording March 20th, 1944. (580752.) systems.” 9348/44. M ay 21st, 1943. (580695.) Standard Telephones & Cables, Ltd., and S. J. W im sett and Record Electrical Co., Ltd. E. O. Willoughby.— “ Arrangements for coup­ — “ Electrical earth leakage devices for electrical ling wide frequency band antennae to trans- apparatus.” 14178. July 25th, 1944. (580787.)

CONTRACT INFORMATION Accepted Tenders and Prospective Electrical Work

Contracts Open Orders Placed Where “ Contracts Open ” are advertised in our “ Official Notices ” section the date o f the issue A u stra lia .— Queensland.— Generating plant is given in parentheses. for regional power boards. Wide Bay: Two turbo-alternators.— General Electric Co., Eng­ A ustralia.—V i c t o r i a .— State Electricity Com ­ land. Capricornia and Townsville: Six boilers mission. November 20th. Six water-tube for each.— Babcock & Wilcox. Three turbo­ boilers for Yallourn, Spec. 46-47/1. alternators for each.— Metropolitan-Vickers. December 4th. Conductors for 264-kV New South Wales. — N.S.W. Railways. transmission lines, Spec. 46-47/35. 33-kV switchgear, Spec. 1,135 (£82,748).— January 22nd. Tw o 50,000-kW steam turbo­ British General Electric Co. Pty. 33-kV outdoor generators, with condensing, feed-water heating circuit breakers, tank lowering devices and and evaporating plant, Spec. 46-47/11. spares, Spec. 1,142 (£15,235).— English Electric B atley.— October 31st. Corporation. L.v. Co.— Tenders (Melbourne.) armoured cables. (See this issue.) B lackpool.— Housing Committee. Accepted. London>— Metropolitan Water Board. Diesel Electrical installations in 32 houses and 32 flats, driven alternator plant. (October 4th.) Grange Park estate.— R. Darbyshire & Co. New Zealand.— November 29th. Trolley-bus B olton. — Health Committee. Accepted. chassis, and/or bodies; town clerk, Dunedin. Fourteen electrically heated food conveyors. Plym outh.— November 2nd. Electricity De­ — Hotlock Products. partment. Meters, time switches, underground B rad fo rd .— Electricity Committee. Accepted. joint boxes, underground disconnecting boxes Meters:— 1,500 25-A.— Sangamo Weston; 500 and two 6-kV outdoor transformers. (See this 5-A.— Measurement. Switchgear for Four issue.) Lane Ends substation.— A. Reyrolle & Co. Pudsey.— October 15th. Electricity Depart­ Housing Committee. Accepted. Electrical ment. Paper-insulated cables. (September 27th.) installations in 268 houses, Thornton and Southend-on-Sea.— November 11th. Electricity Eccleshill estates.— J. Carter & Sons (Bradford). -Department. 11-kV metalclad switchgear, C ardiff.— Transport Committee. Accepted and e.h.v. and l.v. cable. (See this issue.) for trolley-bus substations. Transformers and Southport.— October 14th. Electricity De­ rectifiers (£9,989).— G.E.C. Rectifier and partment. Eighty cast-iron short street lighting feeder panels (£8,182).— Hewittic Electric Co. - standards. (September 27th.) . W o rth in g .— Water Committee. Accepted. October 26th. Corporation. Electric light­ Electric pum ping plant at Broadwater pum ping ing installation, Floral Hall. (September 27th.) station (£5,999).— Sulzer Bros. Stalybridge.— October 14th. Town Council. Electricity Committee. Accepted. Two Electric lighting equipment in Victoria Market 500-kVA transformers (£900 each).— G.E.C. Hall. Borough surveyor. Town Hall (deposit: Switchgear.— English Electric Co. (£401) and 10s. 6d., returnable). Crom pton Parkinson (£1,482). 596 E l e c t r ic a l R e v ie w October 11,1946

L iverpool,— New factory, K irby trading estate; Contracts in Prospect Blakemore & Webster, Ltd. Particulars o f new works and building schemes for Long Eaton.— Houses (140), Welbeck Road; the use of electrical installation contractors and H. Raven, engineer, Tow n Hall. traders. Publication in this section is no guarantee that electrical work is definitely included. Alleged Manchester.— Extensions, high school for inaccuracies should be reported to the Editors. boys, prim ary school, Crossacres, and junior art school; city architect. A ngus.— Houses (26), at Friockheim; master M eriden.— Houses (20), Marston Green, for of works, County Buildings, Forfar. R.D.C. (£25,184); R. J. Whitehead, builder, Beaconsfield.— Cottages (80), on Candlemas Nether Whitacre, W arwickshire. Mead site; Burgess, Holden & Watson, Middlesbrough.— Aluminium houses (144); architects, Penn Road. A. Robinson, Linthorpe Road. B o lto n .— Houses (29), Lever Edge Lane Newcastle-on-Tyne.— Factory, Northern Fur­ (£24,481); W. Gaskell & Son, builders, 6, nishing Co., 215-229, Scotswood Road; C. H igh Street. Solom on, 3, St. M ary’s Place. B rid p o rt.— Block of 36 flats and ancillary Houses (350), on the Blackett-Ord estate; buildings, West Allington; Lambert & Oliver, city engineer. architects, 21, W est Street. Rebuilding of Crem ona Confectionery Works, Benton Road; T. E. Ridley, 7, M oor Crescent, B rix to n .— Flats (178), Tulse Hill estate (£178,960); W . J. Simms, Sons, & Cooke, Ltd. G o s f o r t h . Norbury.— Houses (22), Norwood Station C ardiff.— Houses (206), Tonyrpywen estate estate; B. G. Utting & Co., Ltd., 10, Gracefield (£234,840); W alker Building Co. (Cardiff), Ltd. Gardens, S.W.16. Houses (100), for key workers, Caerau Park and Rum ney; city architect. Northfleet.— Houses (90), New House Farm estate (£109,982); R. H opkins & Sons, builders, Cheltenham.— Houses (30) for R.D.C. ; Central Station Approach, Gravesend. Rainger & Rogers, architects, 29, Rodney Road. S alfo rd .— Extensions, X-ray department, Hope C lacton.— Houses (88), Bull Hill housing Hospital (£6,050); city engineer. estate; W. Aiston, engineer and surveyor to the Council, Tow n Hall. S e lk irk .— Houses (120) for Town Council; town clerk. Consett (Co. Durham).— Houses (94) for U.D.C.; J. F. Eltringham, Derwent Street, Skipton.— Houses (30), Horse Close estate; Blackhill, Co. Durham . W . & J. Glossop, Ltd., builders, Hipperholme, C oventry.— Temporary Council offices, Earl Halifax. %£ Street (£11,400); city engineer. S o u t h S h ie ld s . — S i x n e w s c h o o l s a n d five ,3 0ne branch clinics for Education D ep tfo rd .— Houses (21), Millmark Grove; Com m ittee (£500,000); T. A. Page, Son & Hill, 75, King ;/'" A m e y B r o s . S t r e e t . 1 D o n caster.— New factory; Kalee, Ltd., 60/66, Spenborough.— Houses (200), Windy Bank W ardour Street, London, W .l. estate (£222,446); Yorkshire Builders, Ltd., -- D u rh am .— Houses (50), Sunderland Road Leeds Road, Otley. estate; city engineer. Thornton Heath.— Factory, London Road; -= < E d in b u rg h .— Factory for Toffolo, Jackson & C. W. Goddard, 456, Brighton Road, South 1 an Co., Ltd., tile and marble works, Glasgow; C r o y d o n . a> m a n a g e r . W ak efield .— Cinema, Batley Road; Parkrow •sal E x e te r.— Temporary shops (54) on blitzed Cinemas, Ltd. wb sites (£33,000); borough engineer. W allsen d .— Houses (36), on the Sunholm ® o i Felton (Northumberland).— Houses (40) for estate; W. Leech, builder, 2, Clayton Street, ai a Alnwick R.D.C.; G. Reavell, Lloyd’s Bank Newcastle-on-Tyne. r. p Chambers, Alnwick. Factory extension for Victor Products, L td.; ijfc G atesh ead .— Factory for H. Leverton & Co., R . T. James & Partners, civil engineers, St. Ltd.; North-Eastern Trading Estates, Ltd., Nicholas Buildings, Newcastle-on-Tyne. L o w F e ll. Whaley Bridge.— Houses (24), Elnor L ane fo r *®t Hammersmith.— Flats (56), Riverside Gardens U .D .C .; H. J. Fletcher, builder, High Street, t (£85,593); borough engineer. Disley, Cheshire. H e re fo rd .— Houses (68), Whitecross; city W o o d fo rd .— Flats (42), in seven blocks, a r c h it e c t . Eastern Avenue, Wanstead; Tooley & Foster, Hetton-le-Hole (Co. Durham).— Houses (74), Midland Bank Chambers, Buckhurst Hill, Prospect Avenue site; A. H. Fennell & Co., E s s e x . Bridge End Chambers, Chester-le-Street. Woolwich.— Flats (289), Barnfield Gardens Hi H u ll.— Reconstruction of City Hall; city (£303,303); Spiers, Ltd., Westminster. a r c h it e c t . Dwellings (72), W oodlands estate (£75,270);^ L a m b eth .— Houses (72), and flats (48), Porto- borough engineer. bello estate (£153,182); W. H. Gaze & Sons, W o rk so p .— Houses (70), Pelham Street and Ltd., builders, Kingston-on-Tham es. Shrewsbury Road, M anton; borough engineer, L eeds.— New factory; Hepton & Co. Park House. (Clothiers), Ltd., Sovereign Street, Swinegate. Worsborough (Yorks).— Houses (78), E ta Llanfyllin.— Permanent houses (32) for the House estate (£93,990); Rawson Porter and

,TiO overcome these insidi- -*■ ous enemies of H igh Ten­ sion System operation calls for long and intimate experi­ ence of the problems involv­ ed. It entails intensive tests and trials carried out in lab­ oratories equipped with the most modern plant and facilities. This insulator incorporates the very latest developments in design for combating foul air and fog — and like all Bullers products, stands up to its job. Whatever your insulating problems, bring them to P u llers.

BULLERS LTD., 6, Laurence Pountney Hill, London, E.C.4. Phone : Mansion House 9971 (3 lines) Telegram s : •' Bullers, Cannon, London ” 5 8 E l e c t k ic a l R ev iew October II, 1946

ELECTRIC UNIT HEATERS

A tvartime development which has come to stay

5 to 20 kW IN THIS TYPE Numerous works and factories have been comfortably, con­ veniently and economically heated with these units. T hey need no floor space, no boiler house, no fuel, no labour. In relation to heat output they are of th e sm allest size and use The 21 kW UNIT the least metal. just as simple to install, easily Lowest capital cost. adjustable for direction of warm Low operating costs. air flow. Runs almost noise­ Each unit can be worked inde­ pendently with or without lessly. Size approx. x n f " . g" thermostatic control. Finished metallic bronze cellulose.

Advt. of The General Electric Co. Ltd., Head Office, Magnet House, King sway, London, W .C. 2. October 11, 1946 E l e c t r ic a l R eview 5 9 -CLASSIFIED ADVERTISEMENTS . ADVERTISEMENTS for insertion in the following REPLIES TO advertisements published under a Friday s issue are accepted up to First Post on Box Number if not to be delivered to any particular M onday, at Dorset House, Stamford Street, London, firm or individual should be accompanied by instruc­ S .E .l. tions to this effect, addressed to the Manager of the THE CHARGE for advertisements in this section ELECTRICAL REVIEW. Letters of applicants in is 2/- per line (approx. 7 words) per insertion ; ONLY OFFICIAL AND GOVERNMENT ANNOUNCE­ such cases cannot be returned to them. The name MENTS CAN NOW BE DISPLAYED 3 0 /- per of an advertiser using a Box Number will not be inch. Where the advertisement includes a Box disclosed. All replies to Box Numbers should be Number this counts as six words and there is an addressed to the Box Number in the advertisement, additional charge of 6 d. for postage of replies. c/o ELECTRICAL REVIEW, Dorset House, Stam­ SITUATIONS WANTED. — Three insertions ford Street, London, S.E.l. Cheques and Postal under this heading can be obtained for the price of Orders should be made payable to ELECTRICAL two if ordered and prepaid with the first insertion. REVIEW LTD. and crossed.

Original testim onials should not be sent with applications for employment.

OFFICIAL NOTICES, TENDERS , ETC, COUNTY BOROUGH OF SOUTHEND-ON-SEA ELECTRICITY DEPARTMENT COUNTY COUNCIL OF MIDDLESEX rpENDERS are invited for the supply and delivery of Building and Engineering Works the following: (a)* 11,000-volt, 150-MVA Metalclad Switchgear; (b) E.H.T. Cable (11 kV); (c) L.T. Cable. Specifications, conditions and forms of tender may be PPLICATIONS are invited from contractors for the obtained from the Borough Electrical Engineer. Electric A inclusion of their names in the County Council’s House. London Road. Southend-on-Sea. approved list of contractors for building and engineering Tenders must be submitted on the forms provided, works, e.g.. building, redecorations and repairs, structural enclosed in plain envelopes (which shall not bear any name steel, roads, bridges, sewers, land works, tarpaving and or mark indicating the sender), sealed and endorsed as tarmac, electric lighting and power installations. X-ray follows: (a) “ Tenders for Switchgear” ; (b) “ Tenders apparatus, refrigerators, electric lifts, cooking equipment, for E.H.T. Cable ” ; (c) “ Tenders for L.T. Cable." laundry equipment, sterilizing and disinfectant plants, Tenders must be delivered to the Town Clerk, Municipal swimming pool filtration and treatment plant, water Buildings, Southend-on-Sea, not later than the first post softeners, boiler house, pumping and calorifier equipment, on Monday. November 11th, 1946. Tenders which do not heating and domestic hot water installations and gas comply with these instructions will not be considered. services, library and laboratory joinery, etc. The Corporation does not bind itself to accept the lowest No application will be granted unless the Council is or any tender. satisfied as to the capacity and standing of the applicant R . C. GOLDING. and as to the conditions under which labour is employed Electric House. Borough Electrical Engineer. by the applicant. Otherwise, the granting of applications London Road, Southend-on-Sea. will be at the complete discretion of the Council and the 5th October. 1946. 2860 reasons for the refusal of any application will not be given. The inclusion of any name in the list will not impose SITUATIONS VACANT any obligation upon the Council to invite tenders from the contractor or to accept any tender of his which may BOROUGH OF EALING ELECTRICITY subsequently be submitted, and the Council will be entitled, SUPPLY DEPARTMENT at any time, to remove the contractor’s name from the list without indicating to him its reasons. Appointment of Assistant Consumers’ Engineer Applications must be made on the appropriate form, which may be obtained by sending a stamped addressed A PPLICATIONS are invited for the above appointment envelope to the undersigned (reference C/GP/G). Com­ from persons who have had a sound theoretical and pleted applications should be returned as soon as possible practical training in electrical engineering. Candidates before the 4th Novem ber, 1946. must possess a knowledge of tariffs, wiring installations C. W . R A D C LIFFE . and electrical apparatus, including application to hot water Guildhall, * Clerk of the County Council. systems. Preference will be given to candidates with Westminster. S.W .l. recognised technical qualifications. 1st October. 1946. 2942 Salary and conditions of service will be in accordance with the agreement relating to Salary and Conditions of BOROUGH OF BATLEY Employment of the National Joint Board, Class F, Grade 8 . at present £464 2s. per annum. rPHE Batley Corporation invite tenders for the supply The successful candidate will be required to pass a and delivery of Low Tension Paper Insulated Lead medical examination, and the appointment will be subject Sheathed Steel Tape Armoured Cables of various sizes. to the Local Government Superannuation Act, 1937. Specification and form of tender may be obtained from the Canvassing will be a disqualification and applicants should Borough Electrical Engineer, Electricity Works, George disclose whether to their knowledge they are related to Street. Batley. any members or chief officers of the Local Authority. Tenders should be sent to the undersigned in plain sealed Applications, endorsed "Assistant Consumers’ Engineer,” envelopes, bearing no mark to indicate the sender, endorsed giving age, technical training,-qualifications, etc., together “ Tender for L.T. Cables.” and are to be delivered not with copies of three recent testimonials, should be addressed later than noon on Thursday. October 31st, 1946. The to the undersigned so as to be received not later than first Corporation does not bind itself to accept the lowest or post. Monday. October 21st, 1946. any tender. RONALD BIRT. L. O. BOTTOMLEY. Borough Electrical Engineer Town Hall. B atley. Town Clerk. Electricity House. and Manager. 10th October. 1946. 2918 Ealing, W.5.______2917

CITY OF PLYMOUTH ELECTRICITY DEPT. METROPOLITAN BOROUGH OF STOKE NEWINGTON ELECTRICITY DEPARTMENT

tE Plymouth Corporation invite tenders for the supply A PPLICATIONS are invited from qualified persons for r of (a) Meters; (b) Time Switches; (c) Underground the post of Meter Repairer at J.I.C. rate of pay, at Joint Boxes’ (d) Underground Disconnecting B'oxes; (e) present £5 18s. 8d. per week of 47 hours. Applicants must Two 5-MVA 33.6. 6 -kV Outdoor Transformers. be familiar with A.C. and D.C. meters, both of quarterly Applications for specifications and forms of tender and prepayment types, and should have had experience in should ho addressed to th e City Electrical Engineer. Armada reconditioning meters removed from circuit. Street P l y m o u t h . Completed tenders must reach the Applications in candidates’ own writing (no special undersigned not later than noon on 2nd November. 1946. form), giving particulars of training and experience, should COLIN CAMPBELL, Town Clerk. be addressed to the Borough Electrical Engineer. Elec­ October, 1946. 2937 tricity Offices. Edward’s Lane. N.16. 2912 60 E l e c t r ic a l R ev iew October 11, 1946

BOROUGH OF LEYTON ELECTRICITY DEPT. BOROUGH OF LEYTON ELECTRICITY DEPT.

A PPLICATIONS are invited for the appointment of a PPLICATIONS are invited for the appointment of a Distribution Draughtsman at a salary in accordance A Substation Attendant at a salary in accordance with with the National Joint Board Schedule, Grade 9, Class F, the National Joint Board Schedule, Grade 9, Class F, IIP plus 5% London Area (at present £375 18s. rising to plus 5% London Area (at present £375 18s. p.a. rising Pfrl £391 13s. p.a.), and applicants should have a sound experi­ to £391 13s. p.a.). ence in the design and erection of substation buildings, Candidates should have had suitable technical training the layout of distribution networks, and the keeping of and experience in the control of high and low tension records connected therewith. It should be noted that at switchboards in a main substation receiving a bulk supply. the present rate of growth of load the undertaking is Experience with rotary plant and glass bulb rectifiers will likely to transfer to Class G in the near future. be an added advantage. ji.# The appointment will be subject to the provisions of The appointment will be subject to the provisions of the Local Government Superannuation Act, 1937, and the Local Government Superannuation Act, 1937, and gei the successful candidate will be required to satisfy the the successful candidate will be required to satisfy the Council’s Medical Officer of Health as to his medical fitness. Council’s Medical Officer of Health as to his medical fitness. Applicants must not be more than 40 years of age at date Applicants must not be more than 40 years of age at date of appointment, and it will be a condition of appointment of appointment, and it will be a condition of appointment that the successful candidate must be a member of a that the successful candidate must be a member of a trade union. trade union. 'trate Applications in the candidate’s own handwriting, stating Applications in the candidate’s own handwriting, stating slWh age, qualifications, experience, particulars as to member­ age, qualifications, experience, particulars as to member­ ship of a trade union, and when able to take up duties, ship of a trade union, and when able to take up duties, accompanied by copies of not more than three recent accompanied by copies of not more than three recent testimonials, to be sent to the Borough Electrical Engineer testimonials, to be sent to the Borough Electrical Engineer and Manager, Electricity Offices, Cathall Road, Leyton- and Manager, Electricity Offices, Cathall Road, Leyton- stone, E .ll, not later than first*post on Saturday, 26th stone, E .ll, not later than first post on Saturday, 26th October. 1946. Canvassing in any form will be a dis­ October, 1946. Canvassing in any form will be a dis- qualification. qualification. D. J. OSBORNE. D. J. OSBORNE. J1Ï0FI Town Hall, Town Clerk. Town H all. Town Clerk. Leyton, E.10. 2945 Leyton. E.10. ______2943 . « o ■ ip a s BOROUGH OF LEIGH ELECTRICITY DEPT. CITY OF BATH ■sKiitli ■;.i Appointment of Junior Mains Assistant Appointment of Lady Demonstrator a rit tin

PPLICATIONS are invited for the appointment of PPLICATIONS are invited from persons holding the ijtóiDił A Junior Mains Assistant in the above Department. A E .A .W . D iplom a or equivalent to instruct consumers ■ K dr The salary will be in accordance with the N.J.B. Schedule, in the use of cookers and other electrical appliances. The Grade 9a, Class E, at present £317 per annum, rising to successful applicant will be required to lecture and to give e of age, £324 per annum in four years. practical demonstrations to small audiences at the show­ Applicants must, as a minimum of qualifications, possess room and to visit consumers at home demonstrations. She EC îtiü] the Higher National Certificate in Electrical Engineering, will be required to keep appropriate records and arrange be a Graduate of the Institution of Electrical Engineers, showroom displays. practical experience in the installation and maintenance The salary offered is £240 per annum, plus war bonus of E.H.T. and L.T. switchgear and an underground distri­ at the rate of £48 2s. per annum. The appointment will bution system, together with mains records. be subject to the provisions of the Local Government mdki] The appointment, which will be subject to the provisions Superannuation A ct, 1937, and th e successful candidate of the Local Government Superannuation Act, 1937, and will be required to pass a medical examination. t " ud ij the selected candidate passing satisfactorily a medical Applications, giving particulars of age, training and examination, to be conducted by the Council’s Medical experience, together with copy testimonials, should be :üiaoaHö Officer of Health, will be determinable by one month’s addressed to the City Electrical Engineer, The Old Bridge. notice on either side. Bath, so as to reach him on or before 21st October. 1946. Applications, endorsed “ Junior Mains Assistant.” J. BASIL OGDEN, Town Clerk. stating age and containing particulars of education, quali­ 2867 fications and experience, accompanied by copies of not more than three recent testimonials, must be delivered to BOROUGH OF FULHAM ELECTRICITY DEPT. ]TQFBUU T. S. Parkinson. Esq., A.M.I.E.E., B’orough Electrical elect Engineer and Manager, Electricity Offices, Charles Street, HE Council invites applications from candidates not Leigh (Lancs.), not later than October 28th, 1946. T over 40 years of age for the following positions:— G ALBERT JONES. Town Clerk. STRUCTURAL AND ENGINEERING DRAUGHTS­ Town Hall, Leigh. ______2925 MAN. Salary : M inim um £4 per week (age 21 years) jymun» to £ 1 0 per week, dependent upon age and qualifica- BOROUGH OF LEYTON ELECTRICITY DEPT. tions, plus cost-of-living bonus. mïï? MECHANICAL DRAUGHTSMAN. Ditto. Trf A PPLICATIONS are invited for the appointment of a ARCHITECTURAL DRAUGHTSMAN. Ditto. Chief Demonstrator (Female) from persons who have Form of application and general conditions of the ^ had a good general education, hold a Diploma in Cooking appointm ents m ay be had on sending stam ped addressed :Yl'n 011 and/or Electrical Housecraft, and have a thorough know­ foolscap envelope to me. Completed applications must be ledge of electrical domestic apparatus. posted to reach m e not later than 12 noon on Monday, y In the absence of a recognised scale for this class of 28th October. 1946. S*“! appointment, the salary will be £350 p.a., plus cost-of- CYRIL F. THATCHER. living bonus, at present £48 5s. p.a. Town Hall. Fulham, S.W.6 . Town Clerk. J g ’tln The appointment will be subject to the provisions of Septem ber, 1946.______2841 the Local Government Superannuation Act, 1937, and the successful candidate will be required to satisfy the Coun­ HEBDEN ROYD URBAN DISTRICT COUNCIL cil’s Medical Officer of Health as to her medical fitness. Substation Assistant Applicants must not be more than 40 years of age at date ^ORTH u of appointment, and it will be a condition of appointment than the successful candidate must be a member of a PPLICATIONS are invited for the appointment °Wp.T trade union. A Substation Assistant. The salary and conditions of.;!1-Alj Applications in the candidate’s own handwriting, stating service will be in accordance with N.J.B. Scale, Class age, qualifications, experience, particulars as to member­ Grade 8 b. at present £300 per annum , w ith an expected.., J* C ship of a trade union, and when able to take up duties, increase in the near future when the undertaking becomes'.,.*}11 be accompanied by copies of not more than three recent scheduled in Class B. 11Uappoi ai testimonials, to be sent to the Borough Electrical Engineer Applications, stating age. qualifications, particulars fay“®a and Manager, Electricity Offices, Cathall Road, Leyton- training;training and experience, . . together______with______copies of not morer^TO stone, E .ll. not later than first post, Saturday. 26th thanthan two recent testimonials, to be delivered to the under-'..:underc^o WrP0 October. 1946. Canvassing in any form will be a dis signed not later than October 22nd. 1946. 'J 01 & qualification. R. ASHWORTH. RBM I) «I. O SBO R N E, Council Offices. Clerk o£ the Council. n“eu Town Hall. Town Clerk. Hebden Bridge. . Leyton, E.iU. -2944 4th October, 1946. 288tlj °®ces. -worth, ■ October 11, 1946 E l e c t r ic a l R eview 61

CROWN AGENTS FOR THE COLONIES MANCHESTER CORPORATION ELECTRICITY DEPT.

Colonial Government Appointments ANTED for duties in power station : W ONE COMBUSTION ENGINEER, at a. salary in A PPLICATIONS from qualified candidates are invited accordance with Class J. Grade 9, of the N.J.B. Schedule, for the following post: Workshop Foreman (Elec­ which is equivalent to £425, rising by two biennial incre­ trician) required by the Nigerian Government. Kailway for ments to £445 per annum. Applicants must have had one tour of 18 to 24 months, with prospect of permanency. previous experience in power station .operation and in Commencing salary according to age and war service in efficient combustion of low grade fuel in water tube boilers the scale £400 rising to £560 a year. On salary of £400 fitted with mechanical stokers. there is a local allowance of £60 a year, and for married ONE CONTROL ROOM ASSISTANT ENGINEER, at men a separation allowance between £84 to £204 according a salary in accordance with Class J. Grade 10a. which is to number of dependants. Outfit allowance £60. Free equivalent to £335, rising by two biennial increments to passage and quarters. £350 per annum. Candidates, not over 40 years of age.must have served Candidates for both positions must have served a work­ an apprenticeship as an electrician and had at least seven shop apprenticeship and have the Higher National Certi­ years’ subsequent experience in a British railway or loco­ ficate in Electrical Engineering, or equivalent. Applicants motive builder's workshop. They must be fully conversant without these qualifications because of service in H.M. with repairs to electric motors, driving machine tool equip­ Forces will be considered. ment, overhead cranes and their control gear and wiring The appointments are subject to the City Councd Super­ systems (both A.C. and D.C.), including armature winding. annuation Scheme, and the successful candidates wilL be Experience of generating station rotary convertors an required to pass a medical examination. advantage. Applications, giving full particulars of age, technical Apply at once by letter, stating age, whether married training and experience, together with copies of recent or single, and full particulars of qualifications and experi­ testimonials, should be endorsed " Combustion Engineer ” ence. to th e Crown Agents for th e Colonies. 4, Millbank. or "Assistant Engineer, Control Room,” and addressed to London. S.W .l, quoting M /N /15136, on both letter and Mr. R. A. S. Thwaites. Chief Engineer and Manager, Elec­ envelope.______2908 tricity Department, Town Hall. Manchester. 2, not later than Monday, 28th October, 1946. Canvassing, directly CITY OF MANCHESTER ELECTRICITY DEPT. or indirectly, will disqualify. PHILIP B'. DINGLE. j A PPLICATIONS are invited for the position of Resident Town Hall, Manchester, 2. Town Clerk. Engineer at Barton Power Station, at a salary in October. 1946.______2862 . accordance with Class K. Grade 3. of the N.J.B. Schedule (£839 p.a. rising by two biennial increments to £877 p.a.), PONTYPRIDD URBAN DISTRICT COUNCIL together with the free tenancy of a house from December, 1947. Appointment of Electrical Engineer and Manager Applicants must have had a good engineering training. £3- followed by experience in the operation and maintenance A PPLICATIONS are invited from suitably qualified of plant in large Selected Stations. They should be under persons for the above appointment. The salary, in —a; 45 years of age. possess administrative ability, and be accordance with the agreement dated the 9th July. 1941. Corporate Members of either th e Institution of Electrical made between the National Joint Council for Local Authori­ ££Si Engineers or the Institution of Mechanical Engineers. ties and Chief Electrical Engineers, based on the output, S5E: The appointment will be subject to the City Council is at present £797 per annum. The amount of salary, Superannuation Scheme, and the successful candidate will however, for the first and second years (see Clause 10 of l ssi: be required to pass a medical examination, the agreement) to be determined according to the experi­ sacs* Applications, on a form to be obtained from Mr. R. A. S. ence and qualifications of the successful applicant. A - - ~ Thwaites. Chief Engineer and Manager, together with cost-of-living bonus, at present £59 16s. per annum, will copies of recent testim onials, should be endorsed "R esident be paid in addition. uiel I Engineer," and addressed to the Chairman of the Elec- Recent experience in the management of electricity J tricity Committee, Town Hall, Manchester. 2, not later supply undertakings is essential, and applicants must have £ than 10 a.m . on Monday. 21st October, 1946. Canvassing, a sound knowledge of both alternating current and direct r.&i directly or indirectly, will disqualify. current supplies. Experience in the operation of a small 13tea PHILIP B. DINGLE. power station, especially one operated in conjunction with E M Town Hall. M anchester. 2. Town Clerk. a refuse destructor, will be an advantage. The appointment 25th September. 1946.______2774 will be subject to the Local Government Superannuation Act, 1937. and to a satisfactory medical examination. CITY OF BULAWAYO. SOUTHERN RHODESIA. Applications must be sent to the undersigned, together ELECTRICITY DEPARTMENT with three recent testimonials, so as to be received not later than Saturday, the 19th day of October, 1946, in Generation Engineer envelopes endorsed " Electrical Engineer.” H. LEONARD PORCHER. e. A PPLICATIONS are invited for the above appointment Municipal Buildings, Clerk of the Council. ir-r -¿A. from Chartered Mechanical Engineers with power Pontypridd. station experience at six hundred pounds pressure or 30th September, 1946.______2898 ]jjj more, to take charge of the Council’s two power stations, nv The salary will be £700 rising by increments of £25 to COUNTY BOROUGH OF BOLTON ELECTRICITY gfcs £850. plus cost of living allowance. A house will be pro- DEPARTMENT vided at £8 monthly rental. Contract for not less than three years under usual service conditions. Appointment of Mains Engineer * Iff?: i Applications, by air mail, giving full details of experi­ ence. accompanied by an unmounted photograph, should A PPLICATIONS are invited for the position of Mains TfliTfSi be received by the undersigned not later than October - Engineer from engineers who are Corporate Members Tt 20th. 1946. The successful applicant’s passage money will of the Institution of Electrical Engineers and who have be refunded and salary paid from date of leaving England. had considerable experience in the organisation of the -—^ H. J. COOK. Town Clerk. distributing system of an electricity supply undertaking, H1CT 2831 and in the design and layout of three-phase, E.H.T. and L.T. networks, including transformer substations. WHITWORTH U.D.C. ELECTRICITY DEPARTMENT The salary and conditions will be in accordance with Grade 3. Class H, of the N.J.B. Schedule, at a commencing T?LECTRICAL Engineer required to take charge of and basic salary of £662 per annum. The appointment is manage the Council's Undertaking. The Council pur­ subject to the provisions of the Local Government Super­ chases in bulk from Rochdale Corporation. The person annuation Acts, and the successful candidate will be amrcffited will be required to subm it to a m edical examina- required to pass a medical examination. ® !d ifa m w in ted to contribute to the Superannuation Forms of application may be obtained from the Engineer Scheme Th??Slary offered will be comm ensurate with the and Manager. Back o’ th’ Bank Generating Station, Bolton, SW mendariois of the National Agreement. Candidates and when completed must be returned to him in envelopes ■ sknfid^be Corporate Members of the Institute of Electrical endorsed " Mains Engineer ” not later than 24th October. E n g in e e rs or possess equivalent technical qualifications. 1946. Relationship to any member of the Council or S S in n s marked ‘ Electrical Engineer, to be de- senior officer of the Corporation must be disclosed and Uvered to the iSdersigned by 19th October. 1946. canvassing will be a disqualification. to me HARRY HOYLE. PHILIP S. RENNISON. p i Clerk of the Council. Conned Offices. 2799 Town Hall. Town Clerk. Whitworth, nr. Rochdale. 2/92 Bolton. 2902 62 E l e c t r ic a l R ev iew October 1946

CROWN AGENTS FOR THE COLONIES COUNTY BOROUGH OF CROYDON ELECTRICITY DEPARTMENT Colonial Government Appointments Deputy Chief Engineer and Manager PPLICATIONS from qualified candidates are invited (Amended Advertisement) A for the following post: Station Superintendent re­ quired for Sierra Leone Government Public Works Dept, A PPLICATIONS are invited for this appointment from - for one tour of 18r24 months in first instance. men who are Corporate Members of the Institution •’> Salary £500 rising to £600 a year. On salary of £500 of Electrical Engineers experienced in the management ' : cost-of-living allowance for single men of £40 a year and and administration of a large electricity undertaking. for married men separation allowance of between £84 and Salary £1,350 per annum, plus bonus (at present £59 16s. , £204, according to number of dependants. Free passages per annum). Subject to his executing an agreement with and quarters. Outfit allowance £60. the Corporation for certain work connected with the pro­ Candidates, not over 40 years of age, must have served posed new generating station, the person appointed will a mechanical or electrical engineering apprenticeship and also receive a payment—not subject to superannuation— 3 have a sound knowledge of the running and maintenance of approximately £400 per annum until December. 1949. of Diesel engines in generating stations. Knowledge of Other payments may be made after that date as further methods of distribution of electricity also necessary and sections of the new station are put in hand. experience of steam turbines an advantage. Terms and conditions of appointment may be obtained : Apply at once by letter, stating age, whether married from the Chief Engineer and General Manager, Electric or single, and full particulars of qualifications and experi­ House. WTellesley Road, Croydon, and should be returned ence. to the Crown Agents for the Colonies, 4, Millbank. to him completed by Monday, 21st October, 1946. Previous TZ. London. S.W .l, quoting M /N /14576 on both letter and applications need not be renewed. Canvassing will dis- envelope. ' 2843 qualify. :C E . T A B E R N E R , Town Clerk. CITY OF BIRMINGHAM ELECTRIC SUPPLY DEPT. Town Hall. Croydon. ______2870

Engineering Draughtsman

PPLICATIONS are invited for the position of Engineer­ PPLICATIONS are invited for the position of Deputy ing Draughtsman, age 26/30, in the Undertaking’s A Borough Electrical Engineer and Manager at a salary A in accordance with Class F, Grade 1, of the National Joint : ; Constructional Department from Corporate Members of Board Schedule of Salaries, commencing at £823 per annum, the Institution of Mechanical Engineers, or others with plus car allowance of £72 per annum. equivalent qualifications, experienced in power station plant layout, including turbo-alternators, boilers, or H.P. Applicants must be Corporate Members of the Institution 3- of Electrical Engineers, or equivalent standard, and have '.Jj& steam and water pipework, etc. had a sound technical education, and technical, adminis- The salary will be on the N.J.B. Schedule, according to trative and commercial experience of a progressive elec- 1CIK experience, between Grade N .ll (£358 per annum) and tricity undertaking. The appointment will be subject to Grade N.lOa (£436 per annum). the Local Government Superannuation Act, 1937, and a £ The appointment will be subject to the Local Govern­ ment Superannuation Act, 1937, and to the passing of a satisfactory medical report. medical examination. Applications must be submitted in the appropriate form, Applications, stating age and giving full particulars of which may be obtained from the undersigned, and should training, qualifications and experience, to be delivered to be returned, together with three recent testimonials, by the undersigned in an envelope endorsed “ Draughtsman ” M onday, th e 28th O ctober, 1946. Canvassing, either not later than 24th October, 1946. directly or indirectly, will be deemed a disqualification. F. W. LAWTON. M.I.Mech.E., M.I.E.E., E. R. FARR. JL’w. 14, Dale End. Chief Engineer and Manager. Tow n H all, Barking. E ssex. Town Clerk. Birmingham. 4.______2861 26th September, 1946.______2849 . CITY OF WORCESTER ELECTRICITY DEPT. METROPOLITAN BOROUGH OF FULHAM ELECTRICITY DEPARTMENT Appointment of Lady Demonstrator

m H E Council invites applications from candidates under PPLICATIONS are invited for the above appointment. J- 35 years of age for the following positions at the A A pplicants m ust hold a diplom a of dom estic science _ commencing salaries stated : — or other approved certificate and have had previous ASSISTANT INSTRUMENT ENGINEER, with prac­ experience in an electricity showroom. tical experience in the manufacture, servicing and cali­ The salary offered is in accordance with the National brating of analytical, temperature and flow instruments Joint Council Scale, £252 to £288 per annum, plus cost- for gas. water and steam. Class L, Grade 10b, of N.J.B. of-living bonus, at present £48 2s. per annum. Schedule. £374 17s. per annum. The appointment will be subject to the Local Government . ASSISTANT CONTRACT ENGINEERS (two) for super­ Superannuation Act. 1937, and the successful candidate vision of electrical installation work, capable of measuring will be required to pass a medical examination. up, etc.. for estimating department data. Class G, Grade Applications, stating age, experience and copy testi- . 9a. of N.J.B. Schedule, £360 3s. per annum. monials, endorsed “ Demonstrator,” to be forwarded to Forms of application and general conditions of the the City Electrical Engineer, Electricity Works, Worcester. appointments may be obtained on sending stamped not later than 19th October, 1946. addressed foolscap envelope to me. Completed applications must be despatched to reach me not later than 12 noon C. H. DIGBY-SEYMOUR. L£§of r Guildhall. Town Clerk. on Monday, 28th October, 1946. W orcester. 2887 _ CYRIL F. THATCHER. ------SOHO’ Town Hall. Town Clerk. MILFORD HAVEN URBAN DISTRICT COUNCIL is ^ Fulham. S.W.6 . 2842 ELECTRICITY UNDERTAKING METROPOLITAN BOROUGH OF BETHNAL GREEN Meter and Test Superintendent ELECTRICITY DEPARTMENT ’.■śsry PPLICATIONS are invited for the above appointment Appointment of Electrical Fitter A from candidates who are capable of taking complete charge of a Type A Non-Polyphase Testing Station as rpH E Council invites applications for the appointment of covered by Grade 6 . Class B. of the N.J.B. Schedule - a, J- an Electrical Fitter for maintenance and construc­ (present salary £402-£417). tional work in static transformer substations; the rate of Applicants must have had experience in the use of ^ 3 1 pay to be that prescribed by the Electricity Supply P otentiom eter equipm ent and be familiar w ith the require- »siject t Industry (District Council No. 10). Greater London Area, ments of the Electricity Supply (Meters) Act. and must be at present 2s. 8 d. per hour (£ 6 5s. 4d. per 47-hour week). capable of repairing and calibrating all types of meters The appointment will be temporary in the first instance, and instruments required in an undertaking supplying both iciipp) with a view to permanency if satisfactory. D.C. and A.C. 0 1;; ^ Applications in writing must be made to the Borough Forms of application and details of duties are obtainable Electrical Engineer and Manager at the Town Hall. Bethnal from the undersigned, to whom the completed forms must Green. E.2, and must reach him by 10 a.m. on Monday, be returned by November 1st. 1946. un 0 21st October, 1946. Canvassing will disqualify. „ „ A. J. DALTON. A.M.I.E.E., W “Oons S. P. FERDINANDO. Town Clerk. Town Hall, Electrical Engineer and Manager. 2866 Milford H aven. 2900 Hill, ct October 11,1946 E l e c t r ic a l R eview 63

COUNTY BOROUGH OF GREAT YARMOUTH METROPOLITAN BOROUGH OF STOKE NEWINGTON ELECTRICITY DEPARTMENT Appointment of Borough Electrical Engineer Appointment of Draughtsman A PPLIOATIONS are invited for the Appointment of APPLICATIONS are invited for the position of Senior Borough Electrical Engineer of the Council’s Draughtsman at a salary of £315 per annum, rising Electricity undertaking from persons experienced in the by annual increments of £15 to £360 Der annum, plus management and administration of such undertakings. cost of living bonus (at present £59 16s.). The salary will be in accordance with the agreement Applicants must be fully-qualified draughtsmen, familiar made by the National Joint Committee of Local with building and structural engineering as applied to Authorities and Chief Electrical Engineers dated 9th substations, etc. A sound knowledge of modern drawing July. 1941, but. in pursuance of clause 10 of this agree­ office practice and general mains records is necessary and ment 85% of the salary will be paid in the first year and the successful candidate will supervise a small staff 92i% in the second year, the full salary being paid in engaged on mains records, photoprinting, building-erection the third and subsequent years. On the present unit assessment of the undertaking this will be £831, £905. and maintenance. The successful applicant will be required and £978 per annum respectively. to pass a medical examination and the appointment is Applicants must be Corporate Members of the Institute subject to the Local Government Superannuation Act. of Electrical Engineers. 1937. Recent experience in Electricity Supply undertaking is Applications, stating age. particulars of qualifications essential and applicants must have a thorough know­ and experience, accompanied by copies of three recent ledge of design and operation of 11 kV and L.T. under­ testimonials, should be addressed to G. T. Allcock. Esq.. ground distribution networks and A.C. and D.C. sub­ Chief Engineer and Manager. Electric H ouse. Great Y ar­ stations. Applicants must also be thoroughly conversant mouth. not later than the 17th October. 1946. endorsed with the Management of Showrooms. Hire and Hire •' Draughtsman.” Canvassing, directly or indircetly. will Purchase. Assisted Wiring Schemes, and the General be deemed a disqualification, and candidates must disclose Administration of an Electricity Department. The in writing whether to their knowledge they are related to appointment will be terminable by three months notice any member or holder of any senior office under the in writing on either side, and will be subject to the Council.. A candidate who fails to do this will be dis­ Council's Superannnuation Act and to a satisfactory' qualified or. if appointed, will be liable to dismissal medical examination. without notice. Applications, on forms to be obtained from the Town FARR A CONWAY. Clerk and accompanied by copies of three recent testi­ Town Hall, Great Yarmouth. Town Clerk. monials. must be delivered to the undersigned by 1st 5th October. 1946.______2935 November. 1946. Canvassing directly or indirectly will disqualify, and any relationship to Officers or Members THURROCK URBAN DISTRICT COUNCIL of the Council must be disclosed. C. K E N T W RIG HT. Grays Electricity Undertaking Town Clerk. Town Clerk. Stoke Newington Chnrch Street. N.16.______2916

Appointment of Meter Inspector and Tester SHEFFIELD CORPORATION ELECTRICITY DEPT.

APPLICATIONS are invited from persons having the A p p o in tm ent of Clerk of W o rk s necessary experience for the post of permanent — , Meter Inspector and Tester in the Grays Electricity A PPLICATIONS are invited for the position of Clerk Undertaking of the Thurrock Urban District Council. of Works on the building and civil engineering I The conditions of employment will be in accordance work in connection with the extensions at Neepsend •ot J | with the agreement of th e D istrict Joint Industrial Generating Station. Applicants must have a thorough 1 Council (No. 10 Area) for th e Electricity Supply In­ knowledge and experience of building and heavy con­ dustry. the present rate of pay being 2/5.49d. per hour struction work, including reinforced concrete and steel 5510 (including bonus) for a 47 hour week. construction and plant foundations, and be capable of The appointment will be subject to the tmns of the setting out, fixing levels, and making records and j.vS* Local Government Superannuation Act. 1937. and the reports. ::z£ successful candidate will be required to pass a medical The appointment is temporary, the anticipated dura­ re Ml examination. tion of the work being at least, three years. The Applications, stating age and experience, together with remuneration will be up to £ 11 11s. per week according rati5 copies of not more than three recent testim onials, to to qualifications. be in the hands of the undersigned not later than the Applications must be submitted on the appropriate cn 1st November. 1946. Canvassing will disqualify, and form which may be obtained from the undersigned, and ji- applicants must state, in writing, any relationship to any must be returned together with copies of not more than e s is member or official of the Council. three recent testimonials not later than Monday. 28th 9 B» A. E. POOLE, October. 1946. sfii* Council Offices. Clerk of the Council. JOHN R. STRUTHERS. :2^® Whitehall Lane. Grays. Commercial Street, General Manager and Engineer. 2nd October. 1946. 2936 Sheffield. 1. October. 1946. 2938 ggf BOROUGH OF CHESTERFIELD ELECTRICITY DEPT. I t ) ' CITY OF OXFORD ELECTRICITY SUPPLY DEPT. I APPLICATIONS are invited for the position of Con- ... sumers’ Engineer and Meter Superintendent in the Appointment of Assistant Meter Engineer Borough of Chesterfield Electricity Departm ent. The salary' 111" scale for the position will be that of Grade 3. Class F. as A PPLICATIONS are invited for the position of Assistant prescribed by th e N ational Joint Board for the Electricity ■f*- Meter Engineer in the Meter Testing Department of 9& Supply Industry and will commence at £640 per annum. the Electricity Undertaking, which is a Type A Testing _ Candidates (preferably Corporate Members of the Insti­ Station. Candidates must have sound technical training, n c t totion of Electrical Engineers) must have had considerable and be thoroughly conversant with the construction and ¿ad5 experience in the industrial and domestic use of electricity. operation of single and polyphase metering and meter '53 & and also be caoable of supervising the operation of a testing equipment. ¡ 0 Class A Polyphase Meter Testing Station. Some experience The salary will be in accordance with Grade 8 b. Class G. in change-over work is also desirable. The appointment of the National Joint Board Schedule, commencing at ; - Will be subject to the provisions of the Local Government £408 per annum. The appointment is subject to the • • r; 3 '■ Superannuation Act. 1937, and the successful candidate provisions of the Local Government Superannuation Act. ’ S* will be required to pass a medical examination. 1937. and the selected candidate will be required to pass ■ ¡¡p. Forms of application may be obtained from the Electrical a medical examination prior to appointment. Engineer and Manager. W . W Grune=. E sq.. A.M dbE.E.. Applications, marked “Assistant Meter Engineer.” should " A.M.I.Mech.E.. M.Inst.F.. 1.2. Chatsworth Road. Chest er- be addressed to the City Electrical Engineer and Manager. field, and should be returned to the undersigned not later City of Oxford Electricity Supply Department. 37. George S.; 15 than 10 a.m. on Friday. 1st November. 1946 m envelopes Street. Oxford, and received not later than Monday, the marked “ Consumers' Engineer and Meter Supt. 28th October. 1946. .,fl_ RICHARD CLEGG. „ „ HARRY’ PLOWMAN. ,ci**Towu HaU. Chesterfield. Town C le r k ^ _ T o .5"5 0xford- Town Clerk. 3rd October. 1946. 2905 64 E l e c t r ic a l R e v iew October 11, 1946

CITY OF WINCHESTER COUNTY BOROUGH OF OLDHAM ELECTRICITY f l DEPARTMENT Appointment of Chief Electrical Engineer and Manager Appointment of Junior Charge Engineer PPLICATIONS are invited from qualified Electrical A Engineers for the position of Engineer and Manager A PPLICATIONS for the above appointment are invited. of the City Council’s Electricity Undertaking. Applicants must possess the Higher National Certifi­ The salary and conditions of appointment ‘will be in cate in either Mechanical or Electrical Engineering, or accordance with the agreement made by the National equivalent qualification, with sound practical experience. Joint Committtee of Local Authorities and Chief Electrical Salary in accordance with N.J.B. Schedule. Class H, Engineers dated 9th July. 1941, but in accordance with Grade 9. at present £4Q2-£417 per annum. Clause 10 of that Agreement the Council reserves to itself The appointment will be subject to the provisions of the the option to pay 85% of the salary for the first year and Local Government Superannuation Act, 1937. The 92§% for the second year, the full salary being payable in successful applicant will be required to pass a medical the third and subsequent years. On the unit assessment examination and to comply with the conditions as to for the last complete year, the full salary is at present residence to which appointments under the Corporation £824 per annum. A cost-of-living bonus will also be pay­ are subject. Canvassing will be a disqualification. able at the rate of £59 16s. per annum. The age limit for new entrants to the Local Government Applicants must be Members or Associate Members of Service is 45 years unless a transfer value in respect of the Institution of Electrical Engineers. superannuation is payable. For the purpose of this The person appointed will be responsible to the Elec­ application, the age of applicants who are serving or have tricity Committee and the City Council for the control and served in H.M. Forces will be regarded as being reduced management of the undertaking, and he will be required by the number of years of their war service. to devote his whole time to the duties of the office and Applications, endorsed “ Junior Charge Engineer,” stat­ will not be allowed to engage, either directly or indirectly, ing age, full details or education, training and experience, in private work of any kind. He must live within the city. with copies of not more than three testimonials, to be The appointment, which will be terminable by 3 months’ forwarded to the Chief Engineer and Manager. Corporation notice in writing on either side, will be subject to the Local Electricity Department. Greenhill Offices. Oldham, not Government Superannuation Act, 1937. and the person later than Monday, the 21st October. 1946. appointed will be required to pass a medical examination THOMAS ALKER. to the satisfaction of the Council’s Medical Officer. Town H all. Oldham . Town Clerk. Applications, stating age. previous experience and present 10th October. 1946. *______2930 position, and accompanied by not more than three recent testimonials, should be delivered to me not later than CAPE TECHNICAL COLLEGE, CAPE TOWN Thursday. October 31st. 1946. Envelopes should be endorsed “ Chief Electrical Engineer and Manager.” Lecturer in Electrical Engineering Applicants are required to state in their applications whether to their knowledge they are related to any member of the Council or to the holder of any senior office PPLICATIONS are invited for the following vacant under the Council. Failure to disclose this information A Lectureship in the Department of Engineering at will disqualify the candidate for the appointment. Can­ this College:— vassing members of the Council, either directly or This post entails instruction in both day and evening indirectly, will be a disqualification. classes to apprentices preparing for the National and F. W. KEMPTON, Advanced Technical Certificates of the Union Department The Guildhall, Winchester. Town Clerk. of Education. An engineering degree and practical experi­ 4th October, 1946.______2931 ence in modern engineering plant is desirable. Salary according to the scale £350 X £20-550 X 20-650 STALYBRIDGE, HYDE, MOSSLEY AND DUKINFIELD x 25-700. Commencing salary may be at a higher notch TRANSPORT AND ELECTRICITY BOARD than the initial notch of the scale according to experience and qualifications. Cost of living allowances are paid Two Overhead Power Linesmen according to the Public Service rates, at present £119 per annum for married m en and £34 per annum for single PPLICATIONS are invited for the position of Lines­ There are also substantial Provident Fund and A men. Applicants must have had a wide experience Insurance benefits attaching to the post. An allowance in the construction, erection and maintenance of E.H.T. of £65 travelling expenses will be made and half pay and L.T. overhead lines and services, and the erection of (substantive) during the voyage. street lamp standards and lanterns. The successful applicant will be required to assume duty Conditions of service and rate will be in accordance with by the 1st February, 1947, or nearest date, depending on the D.J.I.C. Schedule No. 3. North-Western Area, Zone A. shipping accommodation. at present 25.97 pence per hour. The selected applicants Applications, w hich should be accom panied by certified will be required to undergo a medical examination and, if copies of testimonials, should be submitted by November approved, will be required to join the Board’s Super­ 20th. Application forms and conditions of service may be obtained from J. A. Ewing & Co. (London) Ltd., Finsbury annuation Scheme. Applications, stating age, details of experience and Court, Finsbury Pavement, London. E.C.2, the represeta- present employment, together with copies of two recent tives of the Cape Technical College in London. 2939 testimonials, should be sent to the undersigned. BOROUGH POLYTECHNIC, BOROUGH ROAD, S.E.1 J. HARWOOD LUMSDEN. Electricity Offices, M.I.Mech.E., A.M.I.E.E., Full-Time Lecturer in the Department of Electrical Tame Valley, Chief Engineer. Engineering Stalybridge. ______2914

WEST MIDLANDS JOINT ELECTRICITY rr^HE Governors invite applications for the above-named AUTHORITY post. Candidates should be qualified to teach Elec­ trical Engineering to degree standard for the Higher Appointment of Civil Engineering Designer National Certificate. Salary. Burnham Scale. Forms of application and conditions of appointment may be obtained by sending a stamped addressed envelope to the under­ rjlH E above-named Authority desire to appoint a Civil signed. Engineering Designer in connection with the design DOUGLAS H. INGALL. and layout of important generating station extensions. Principal. Applicants must have had wide experience in similar work 2915 and must be Corporate Members of the Institution of Civil Engineers or possess an equivalent qualification. The PPLICATIONS are invited for the position of Designer appointment will be for the duration of the contract, A for A.C. motors up to 250 h.*p. Should be top-line which will be approximately three years. man capable of taking complete charge of design at works The salary will be £684 per annum, subject to adjust­ of a large manufacturer in the North of England. Appli­ ments for future variations in the cost of living. cants should be between 30 and 45 years of age and possess fatGH' Application must be made on the prescribed form, which knowledge of all types of induction motors, both single " a l s t may be obtained from the address below, and should reach and polyphase. Excellent prospects and permanency for me not later than the 21st October, 1946. the right man. Please state age, details of education, H. training, F. CARPENTER. experience and salary expected.—Box 2773. c/o Phoenix Buildings. Clerk and Manager. The Electrical Review. Dudley Road. Wolverhampton. RMATURE Winder for repair shop.—Boys Ltd., 187. "Esta 28th September, 1946. 2871 A Goswell R oad, E .C .l. 2720 October 11, 1946 E l e c t r ic a l R eview 65

A R A T IO N S are invited by a supply company for RAUGHTSMAN, Assistant, London, W.C.l, for work u ij u vacancy of Assistant Sales Engineer. Candidates D on audio-frequency equipment and associated high- should have a wide experience on the commercial side of grade light engineering products, progressive salary for an undertaking, particularly in relation to industrial power young applicant with some technical training. State age, supplies. Salary in accordance with qualifications. Apply, experience, salary required.—Box 2800, c/o The Elec­ stating full^ P^ticulars of age, training and experience, trical Review. to—Box ^892, c/o The Electrical Review. RAUGHTSMAN, to take senior position in small \ PPLICATIONS are invited from Transformer Design- D office, London, must have completed sound works ing Engineers (Senior and Junior) for employment training, instruments or light electro-mechanical design, with the Metropolitan-Vickers Electrical Co. Ltd.. Trafford electrical knowledge an advantage. State full details, Park. Manchester. Applicants should state age, full parti­ age. salary required.—Box 2801, c/o The Electrical culars of education, general and technical, apprenticeship, Review. practical training and design experience (the latter not TARAUGHTSMEN, preferably with telecommunications essential for junior applicants). Apply in writing to— experience, required by large firm in the Midlands. The Personnel Manager, Metropolitan-Vickers Electrical Maximum salary £350 plus cost of living bonus. Write, Co. Ltd., Trafford Park, Manchester. 2762 giving details of experience, age, and salary required.— RMATURE Winder Foreman for repair shop, also Box 11, c/o The Electrical Review. A armature winder & improvers.—W. H. Sugden & T^RAUGHTSMEN required for large Mid-Tyne elec- Co. Ltd., Glenny Rd.. Barking. 2934 trical engineering company, experienced draughts­ A RMATURE Winder or good Improver required, used men capable of handling customers’ orders for switchgear, to all types of motors. Knowledge of dismantling control-boards, etc., and of preparing circuit diagrams. and assembly of motors a good advantage. Apply to— Apply, stating age, experience, qualifications, and salary Messrs. Charles H. Harwood & Co. Ltd., 32, Meyrick Road. required, to—Box 2926, c/o The Electrical Review. WiUesden, N .W .10. 114 "PVRAUGHTSMEN (Senior) required for large A.C. and RMATURE Winders and Improvers required, A.C. D.C. machines, including turbo and waterwheel alter­ A and D.C., top rates, good working conditions.— nators, also for medium type A.C. and D.C. machines. Electrical Power Repairs (Gillingham) Ltd., Strover Applications from men with suitable technical qualifica­ Street. Gillingham. Kent. 9664 tions and good general mechanical drawing office experience RMATURE Winders and Improvers urgently required. will be considered. Salary dependent upon qualifications A Top rates and good conditions.—Box 113, c/o The and experience. Apply, giving full details of the quali­ Electrical Review. fications, experience, age and salary required, to—Chief A RMATURE Winders wanted, experienced on A.C. and Draughtsman. Engineering Drawing Office, The General Electric Co. Ltd.. Witton. Birmingham, 6 . 2661 D.C. repair work.—The Midland Electric Installation Co. Ltd., Cyprus Works, Upper Villiers Street, Wolver­ RAUGHTSMEN, Senior and Juniors, over 22, required hampton. 2749 D for power transformers, by a large Birmingham firm. SSISTANT Electrical Engineer, large paperboard mill, Electrical experience desirable but not essential. — B'ox A load 8,000-10.000 kW. Must have had practical 2893. c/o The Electrcial Review. experience of design, distribution problems, switchgear and T'iRAUGHTSMEN with experience in cable layouts various types of electric drives. Knowledge of paper mill required. Salaries in accordance with experience, plus work an advantage, but not essential. Age limit 40. 25% war bonus, plus staff bonus. Apply in writing, giving Qualifications must be of high standard. Apply—St. Anne’s age and full particulars, not later than 18th October next, Board Mill Co. Ltd., Bristol, 4. 2885 to—The Associated Portland Cement Manufacturers Ltd.. SST. Electrical Engineer (35/40) for large modern in­ Works Dept., 192, Ashley Gardens, London, S.W .l. 2756 A dustrial works in Birmingham. Good technical ability; ASCO Electrical Ltd. have vacancies for (a) Production must be qualified practically in the installation and main­ E Assistant, capable of laying out and supervising tenance of industrial electrical plant, including all types assembly of electrical equipment, must possess full elec­ of A.C. and D.C. motors, switchgear, furnaces, plating, trical and technical knowledge L.F. and H.F. circuits and distribution layouts, cabling, wiring, modern lighting rectifying equipment: (b) Toolmaker, for shett metal sec­ schemes, etc. Good disciplinarian and able to efficiently tion, to design and make own jigs and tools and supervise plan work and control labour. Excellent prospects for a same. Both positions are permanent and progressive. good man. Full details of experience, training and salary Apply in writing.—Brighton Terrace. Brixton. S. W.9. 2742 required to—Box 2854, c/o The Electrical Review. T^LECTRIC lamp factory requires Maintenance Engineer. SSISTANT Foreman for winding department. A.C., should have knowledge of all electrical and mechanical A D.C. Motors, fractional to 500 h.p. Permanent problems relating to repetition machines and general fac­ progressive position to suitable applicant.—Higgs Motors, tory maintenance. Applicants should state salary required Witton. Birmingham. 106 and previous experience.—Box 9665, c/o The Electrical A SSISTANT Saleswoman required in electrical contrac- Review. A tors’ showroom (London). — Box 2783, c/o The T^LECTRIC Motor Fitters required, dismantling and Electrical Review. assembling motors in repair shop.—The Midland Z^IABLE Estimator required in sales dept., London, Electric Installation Co.Ltd., Cyprus Works, Upper Villiers ^ preferably with knowledge of export business. State Street. Wolverhampton. 2750 age. experience and salary required. Applications in con­ LECTRICAL Draughtsman required (Wolverhampton fidence.—Edison Swan Cables Ltd., 155, Charing Cross E district), used to designing and laying out factory Road. London, W.C.2. 9698 electrical installation. Good mechanical and electrical /CLERICAL Assistant required for stores office. Must knowledge and experience necessary.—Box 2868, c/o The ^ have good knowledge of electrical material.—London Electrical Review. Electrical Co., 92, Blackfriars Road. S.E.l. 104 LECTRICAL Engineer, age about 30 years, with LERK required for electrical department of well-known E drawing office, estimating and sales experience, wanted C London builders’ merchants. Must be experienced in for Malaya, good salary, three years agreement with wholesale handling of lighting fittings, fires and accessories, first class passage out and home. Apply—Paterson. cable, etc. Good permanent position with increasing pros­ Simons & Co.'Ltd., London House, Crutched Friars, pects. Five-day week. Write, stating age, experience London, E.C.3. 2941 and salary required, to—R. F., W. N. Froy & Sons Ltd.. X^LECTRICAL Engineer required by large oil company Brunswick Works. Hammersmith, W.6 . 2730 for service in Middle East. Applicants must possess /'DRAFTSMEN in Industrial Power urgently required. university degree, A.M.I.E.E. or equivalent qualification, ^ Apply to—Premier Electric Services. Friar Works, and have had extensive practical experience in the instal­ Willow Street, Leicester. 2630 lation. operation and maintenance of Diesel engine alter­ nator sets up to 300 kVA, L.T. overhead and underground R A K E & Gorham Wholesale Ltd. require a Sales mains, internal wiring installations for houses, etc.. and D Manager for Manchester and district. Must have of the electrical apparatus used therein, control of labour, experience in handling general wholesale business, including and some experience in drawing office work, estimating water heaters Apply in writing, stating salary expected, and general administrative routine. Age limit 34, prefer­ kh—Manager! 29. Piccadilly. Manchester. 2901 ably single. Married applicants only considered if prepared T^RAUGHTSMAN-Estimator with experience in mains to live singly for at least first three years. Salary not less and substation work, preferably with a distribution than £800 per annum, plus free quarters/messing, medical company in a rural area: also W ayleave Officer to operate attention and allowances between the range of £ 1 2 0 for in Norfolk Apply, with full details, to—E.A.E.S. Co. the bachelor (or married man without children) to £288 IL R S ) Finborough Hall. Stowmarket. 2839 f

T^LECTRICAL Engineer or Electronic Physicist required, IVE Travellers, all areas U.K., in electrical household capable of original calculations and design work on L goods. Write to — Briscoe Plating Co. Ltd., 3-5, electronic equipment, wave propagation problems and Maddox Street. W .l. 2884 similar work. Degree or equivalent and some research or Ti/TANAGER or Manageress of good appearance and design experience essential. Approximate age 25-30. personality required for high-class electrical and radio Salary £400 approx. Apply—Staff Officer, British In­ retail and art goods business, 30 miles from London. Must sulated Callender’s Cables Ltd., Erith Works, Belvedere, be thoroughly capable and able to take full control. Write Kent. Ref. SR.8 . 2907 with particulars, stating age, experience and salary re­ T^LECTRICAL Testing and Inspection. Man wanted quired.—Box 115, c/o The Electrical Review. with good electrical background and experience to ~|\/rANUFACTURERS and factors of electric fires and take charge of testing and inspection of electrical appli­ domestic appliances require first-class Travellers with ances. Age 30/40. Give full details and salary required. car and connection, for London, Home Counties and —Box 2877, c/o The Electrical Review. Provinces. Write fully.—M. F. & Co. Ltd., 37, Aylmer LECTRICIAN required, good all-round man, main­ Parade. East Finchley, N.2.' 2886 E tenance, breakdowns, installations and repairs. State lV/riCA Products Ltd'., 1, Downs Park Road, London. E.8 , age and experience.—Box 9710, c/o The Electrical Review. require Two Representatives for London and the NGINEERS and Draughtsmen are invited to apply to Home Counties with connection amongst leading engineer­ E a large electrical engineering firm in the Midlands ing, electrical and radio firms, to sell mica, micanite, which has vacancies in the switchgear department for laminated tubes and sheets, all types of machined plastics, Technical Sales, Contract, Costing and Design Engineers; injection and compression mouldings. Letters only, marked also experienced Technical Engineers capable of handling S.M., giving experience and salary required. 2836 large projects for generation, transmission and distribution. LD-established manufacturers (Birmingham), world­ Vacancies also exist for Draughtsmen for circuit diagram O wide connection and available capacity, offer unique and general work.—Box 69, c/o The Electrical Review. opportunity for Electrical Engineer with completed designs XPERIENCED and qualified Assistant Electrical Engi­ and ideas to start electrical department. Small switchgear E neers required for research section of electric cable or domestic appliances, suitable quantity production. Ex­ makers in South England. Write in confidence to—Box cellent prospects.—Box 2844, c/o The Electrical Review. 2883, c/o The Electrical Review. LUMBER-Jointer required for L.T. and H.T. mains. EXPERIENCED Designer to take charge of electric P N.J.I.C. rates paid (Area No. 9).—Farnham Gas & motor designs. Applicants should have held similar Electricity Co., East Street, Farnham, Surrey. 2659 position elsewhere. Generous salary will be paid to appli­ T3LUMBER/Jointers required for experimental and cants having the necessary qualifications.—Box 2906, c/o development work in research laboratories in West The Electrical Review. London. Jointers experienced in E.H.T. cable work pre­ XPERIENCED Lady Clerk required in electrical con­ ferred, but suitable probationary jointers would be con­ E tractors' office (London). — Box 2782, c/o The sidered. Write, giving details of age, qualifications and Electrical Review. experience, to—Box 2908, c/o White’s Ltd.. 72, Fleet OREMAN for armature and motor winding dept., good Street, London, E.C .4. 2888 F wage and commission, and Foreman for general car RODUCTION Superintendent required by leading electrical equipment dept. Applicants must be fully experi­ P engineering organisation to take full control of depart­ enced men, able to repair and rebuild all types of equip­ ment producing medium electrical equipment. Education ment. Also Electricians used to car electrical equipment to degree standard and experience in works management and wiring.—C. G. Hyde, Electrical Specialist, 213a, Queen are essential. Exceptional prospects available for man Mary’s Road, Foleshill, Coventry (Tel. 88908). 2909 with vigorous personality and successful record.—Box 2724, OREMAN required to take charge of winding shop in c/o The Electrical Review. F Bristol. Must have sound knowledge of A.C. and D.C. T3ROGRESSIVE manufacturing co. of domestic electric motors and ability to control labour.—Box E.C., Glovers appliances require Representatives for London and Advertising, Mark Lane, Bristol, 1. 2894 Home Counties. Fullest backing and co-operation guaran­ MMEDIATELY : Ex-M.M.(E)’s please note. Electrical teed. Salary, commission and expenses. Car essential. I Engineer with some experience in mechanical and civil Write in first instance, giving full details of experience, engineering to take complete charge of contracts for small present connections in this trade, and past earnings, all hydro-electric schemes and other electrical contracts in in the fullest confidence, to—Box 178, Phillips Advertising Scotland. Full particulars of experience, age and salary Ltd., 15, Wilton Road, London. S.W.l. 2837 required to—Box 2899, c/o The Electrical Review. /QUALIFIED Engineer for electrical design work in con- NSULATION Testing. Large London factory manufac­ “ nection w ith high voltage equipm ent. Age 25-35. B.Sc. or equivalent, with ability in application of mathe­ turing insulating varnishes, components, etc., has I matics to design problems. Write, giving full details of vacancy for Assistant in their Insulating Laboratory. training, experience and salary required, to Staff Officer. Applicants should be conversant with physical and elec­ British Insulated Callender’s Cables Ltd., Erith, Kent. trical testing to standard specifications and the use of Ref. S R /7 . 2754 up-to-date testing equipment. The position will be per­ 13 EPRESENTATIVE calling on provincial houses re- manent and pensionable. Reply, stating age, qualifications and salary required, to—Box 2872, c/o The Electrical quired to handle high-class wrought iron fittings and R eview . , lampshades for well-known London manufacturer. Write— Box PP4585, Samson Clark, 57/61 Mortimer St. W. 11. 2794 TUNIOR Engineer required for the laboratory of a EPRESENTATIVES for high-class lampshades and London firm of radio component makers. Degree or equivalent essential. Salary £400 upwards according to R domestic heaters wanted, to call on wholesalers and qualifications.—Box 2711, c/o The Electrical Review. stores, for the following districts: Cheshire. Lancs., Nor­ folk. Suffolk, Northampton, Shropshire, Hants and whole TUNIOR Engineer required, preferably with some of West of England.—Box 2743, c/o The Electrical Review. estimating experience, particularly on overhead line T> EQUIRED, for extensive development programme, extension costs. Applications giving full details of ex­ Electrical Draughtsmen with experience in steelworks perience and stating salary required, to—West Cambrian H.T. and L.T. distribution schemes, substation design and Power Co. Ltd., Electric House, Norton, Tenby. 9723 layout, A.C. and D.C. heavy industrial control gear. T E A D IN G engineering organisation requires Sales Draughtsmen with similar experience in other industries Manager for battery electric vehicles. Engineering would be considered. Apply by letter, stating age, experi­ education to degree standard and subsequent industrial ence and salary required, to—Chief Draughtsman. Dorman experience are essential. Ability required to organise and Long & Co. Ltd., Central Engineering Dept., Britannia control sales and service, undertake market research and Works, Middlesbrough. 41 sales campaigns. Exceptional prospects.—Box 2723. c/o EQUIRED. Manager to take complete charge of factory The Electrical Review. R em ploying 100 people mainly engaged on assembly IBRARIAN to take charge of the Reference and Lend­ work (light electrical engineering). Applicant must have L ing Libraries of the Institution of Electrical Engineers. thorough mechanical knowledge and must also be able to Candidates must have had an electrical engineering educa­ control buying and development work. Commencing salary' tion and training and a practical knowledge of the conduct £780 per year, plus bonus. Only applicants who can show of a large collection of scientific books. Languages and thorough and lengthy experience in similar positions need knowledge of decimal classifications also desirable. Apply apply to—Box 2847, c/o The Electrical Review. by letter only, stating salary required, to—The Secretary, SENIOR Draughtsman conversant with machinery for Institution of Electrical Engineers, Savoy Place. London. ^ electric lamp and valve industry, also all other glass- W.C.2. 2869 working machinery.— Box 9705. c/o The Electrical Review. “lY/rANAGER required for electric cable works. Must OENIOR Engineer required for the laboratory of a have had experience in manufacture and selling. *3 London firm of radio component makers. Degree Applicants should give fullest particulars of experience or equivalent with industrial experience essential Salary and should state age and remuneration expected.—Box £500 upwards according to qualifications.—Box 2712 c/o K.437, W. H. Smith & Son Ltd., Manchester, 3. 9708 The Electrical Review. October 11,1946 E l e c t r ic a l R e v ie w 6 7

OENI0R Draughtsman with sound production experience NIVERSITY of London, King’s College, requires an i knowledge of mass production methods U Assistant Lecturer in Electrical Engineering. Can­ and tooling required in design drawing office. Some know­ didates should have a good honours degree and have had ledge of light domestic appliances desirable but not essen­ practical experience in the field of electrical power or tial. rosition oners wide scope and good salary to an electrical machinery. Salary £400 p.a. Particulars and experienced mam Apply in writing to—Morphy-Richards forms of application from the Secretary, King’s College. Ltd.. St. Mary Cray, Kent. 2891 Strand, W.C.2, whom final applications must reach by HORTHAND Typist, previous experience in electric November 9th, 1946. 2910 S supply industry. Good salary and prospects. Apply— ANTED for a Research Establishment at Elstree :— Wessex Electricity Co.. Oxford Road. Newbury. 9702 W 2 Designer Draughtsmen, experienced in the develop­ HORTHAND-Typist required for electrical contractors' ment of mechanical and electrical precision mechanisms. S office, filing and telephone. Good prospects for smart Good knowledge of electrics an advantage. 2 Junior young lady.—Rogers, 7/9. Bloomsbury St.. W.C.l. 2634 Draughtsmen, capable of detailing from development TOREKEEPER Assistant, must be experienced in all drawings of mechanical and electrical precision S accessories, cable, etc. Wholesaler, West End, London. mechanisms. Opportunity for advancement to up-graded —Box 2846, c/o The Electrical Review. positions. Draughtsman experienced in the preparation OUPERINTENDENT of Test Gear Section required by of factory maintenance drawings, and who is capable of London firm of radio component makers. The detailing. Apply, stating age, experience and salary responsibility involves design and maintenance of elec­ required to—Box 2799, c/o The Electrical Review. tronic test equipm ent. Degree or equivalent with \ \ ] rANTED for London Merchant House trading with industrial experience essential. Salary £500 upwards Malaya, young Electrical and Mechanical Engineer according to qualifications.— Box 2710. c/o The Electrical with technical and commercial training to assist buyer. Review. Apply, stating age, training and salary required, to— HE Central Electricity Board (South-East England Box 2940, c/o The Electrical Review. T District), Aldwych House, Aldwych, W.C.2, has YATORKS Manager required for A.C. and D.C. motor vacancies for 2 (Female) Shorthand Typists. Age 18-25. repair works, Birmingham area. Good technical Graded salary scale. Superannuation schem e. Hours qualifications essential. Apply stating age and salary 9.30-5.30. Applications in writing to Manager. 2848 required.—Box 2865, c/o The Electrical Review. HE Civil Service Commissioners invite applications for YA/'ORKS Manager (British) of established electric cable T two posts of Principal Scientific Officer and three posts ' ~ factory in the East requires an Assistant possessing of Senior Experimental Officer at the Guided Projectiles practical experience and theoretical knowledge of V.I.R. Establishment of the Ministry of Supply. Candidates and P.V.C. cable manufacture, embracing wire drawing, should be British subjects, born on or before 1st August, turning, stranding, rubber compounding, tape spreading, 1915. and under 50 years of age on 1st September, 1946. longitudinal covering, armouring and testing. Knowledge Candidates for appointment as Principal Scientific Officer of wire enamelling an advantage but not essential. Excel­ should possess First or Second Class Honours Degree or lent opportunity for the right man. Free furnished equivalent qualification in Physics or Mechanical or Elec­ quarters, free medical attendance and participation in trical Engineering, with knowledge and practical experience provident fund. Three years’ agreement (with proba­ of either (a) Thermo-dynamics, processes of combustion tionary clause) and option of renewal. Passage paid out and design of aero engines, accessories and gas turbines, and home to selected applicant. Apply giving following or (b) Radar, television equipment and accessories. For particulars: (1) Qualifications: (2) Position held past ten Senior Experim ental Officer they m ust (a) B e qualified years: (3) Age: (4) Married or single: (5) If married, state mechanical engineers with a knowledge and experience of if desirous of family accompanying: (6) Nam es of two I.C. engines, gas turbines and accessories and of mass references as to ability: (7) Salary required.—Box 2655. production methods, including fabrication of light alloy c/o The Electrical Review. components, or (b) Be qualified in light electrical engineer­ YYTORKS Manager required for large electrical manufac- ing or physics, with experience of radar, general elec­ * " turers and engineers. Must be experienced production tronics. radio and television, or (c) Have a wide knowledge man, high-grade executive capable of taking full charge and experience of the principles and scientific application of all production departments. Only energetic man with of photography and the designing of photographic instru­ modern ideas as to works management should apply, with ments and recording devices. The appointments are fullest particulars.—Box 2838, c/o The Electrical Review. permanent and those for Principal Scientific Officer carry Y O RK SH O P Manager wanted urgently for electric superannuation benefits under the Federated Superannua­ f ▼ element production in the Midlands. Applicants tion System for Universities and salary on the provincial should have good technical background and experience of scale. £750 x £30 to £1,020. plus consolidation addition production control with mixed labour. Good opportunity ranging from £90 at the minimum to £107 at the maximum. for keen man age 25-35.—Box 2878, c/o The Electrical The posts for Senior Experimental Officers carry super­ Review. annuation benefits under the Superannuation Acts and OUNG Electrical Engineer required by Electrical salary on the provincial scale. £570 x £25 to £750, plus Y Motor Manufacturers, to assist in the Estimating and a consolidation addition of £90 throughout the scale. Forms Design Department, S.E. London area.—Write, stating of application are obtainable from the Civil Service Com­ age, experience, and salary required.—Box 2692, c/o mission, 6 , Burlington Gardens, London, W .l, quoting The Electrical Review. No. 1646, to whom completed applications must be re­ APPOINTMENTS FILLED turned not later than 14th November. 1946. 2852 Dissatisfaction having been so often expressed that un­ HE Vulcan Boiler & General Insurance Co. Ltd. have successful applicants are left in ignorance of the fact that T a vacancy in Wakefield for an additional Electrical the position applied for has been filled, may we suggest Inspector. Applicants must have sound technical training that Advertisers notify us to that effect when they have and practical experience with electrical plant and machinery. arrived at a decision? We will then insert a notice free Age not exceeding 32 years. Commencing salary £365 per of charge under this heading. annum, rising by annual increments to £525 per annum. OROUGH of Maidenhead—Lady Demonstrator and Applications to—67, King Street, Manchester, 2. 2864 B Asst. Mains Engineer: Metropolitan Electric Supply ^TRANSFORMER Design Engineer, experienced in all Co. Ltd.—Substation Shift Engineer: Milford Haven A types up to 500 kVA and capable of developing U.D.C.—Distribution Assistant. All applicants thanked. special types. Progressive position. Write, stating age, SITUATIONS WANTFO experience, salary.—Brentford Transformers Ltd.. Wind­ mill Road. Brentford. Mddx. 2946 A .M.I.E.E. requires senior and responsible position. Wide technical and commercial experience, contracting, ^TRANSFORMER Designer (Junior) required for all types power, illumination, sales management, trade journalism, of transformers up to 3,000 kVA, 33 kV. Reply, etc. Fully accustomed to all management and executive stating age, experience and salary required, to—Works work. Knowledge of Canadian methods and markets. Very Manager. Transformers & W elders L td., Sandown Road, adaptable.—Box 9695, c/o The Electrical Review. Watford. 2741 A .M.I.E.E., wide experience, age 34 years, now on ^TRANSFORMER manufacturer requires the services of demob, leave (major R.E.), requires progressive an expert Transformer Designer with commercial ex­ position in any business with engineering background.— perience and wide knowledge of application of all types of Box 9696. c/o The Electrical Review. transformers and chokes for radio and electronic industries. /^IHIEF Electrician (34) seeks change. Works apprentice- Excellent salary and good Prospects. Fullest particulars in yJ ship, service engineering, 10 years seagoing, mill or first instance will be treated with strictest confidence.— factory maintenance. Anything with prospects.—Box 9703, M cramiScLtd.. Meico Works. Congleton. Cheshire. 2911 c/o The Electrical Review. w n Winders for a North-East iron and steel works to /^JHIEF Storekeeper requires situation with live T deal with A C. and D.C. motor repairs. This is a y-' electrical firm. 14 years’ experience, age 30. permanent position attached to the electrical department Thorough knowledge of all electrical accessories, and SfTfai eVorks. State age and experience to—Box 2859. clerical work, future opportunity becoming a buyer.— c/o The Electrical Review. Box 9/24, c/o The Electrical Review. 68 E l e c t r ic a l R e v ie w October 11, 1946

HIEF Electrical Engineer of large steelworks, success­ AUCTION NOTICES C ful and wide experience, previously 18 years with electrical plant manufacturers, giving satisfaction to G. R. present principals but desires change to South or S.W. By direction of the Ministry of Supply. England. Technical representation required where execu­ FULLER, HORSEY, SONS & CASSELL tive ability is called for.—Box 8661, c/o The Electrical are instructed to offer for Sale by Auction in lots at Review . Woolwich Arsenal, London, S.E., on Tuesday, October /COOKERY Sales Demonstration. Young man (33), 2 2 nd, and day following, at 11 o’clock precisely each day: AJ with E.D.A. certificate, offers services to a go-ahead GENERAL INDUSTRIAL EQUIPMENT AND Electricity Showroom or Manufacturer.—Box 8651, c/o The Electrical Review. SURPLUS STORES T^LECTRIC Lamps. Production Specialist with know- including: 105 Electric Exhaust Fans, 650 Grindstones, ledge of all types requires executive or managerial 75 H and Trucks, 2,300 Pigeon B askets, 120 Vices, post.—Box 9699, c/o The Electrical Review. 90 Anvils and Swage Blocks, 1,750 Trays, 40 Engine-driven LECTRICAL Engineer requires change; seeks respon­ Foam Generators, 250 Grease Guns, 30 tons Bolts and Nuts, 100 Engines, 250 Electric Motors, 700 Pumps, 350 Pressure E sible progressive position; 17 years’ experience in Gauges, 650 Sledge Hammers. 600 Mattocks, 2.100 Wire general and marine electrical engineering, including Cutters. 4,500 Lamps, 1,000 Sheave Blocks, 500 Drawing installation, manufacture and maintenance.—Box 9685, Boards, 4,000 Leather Straps, 2 tons Emery Cloth, c/o The Electrical Review. Physical and Chemical Laboratory Equipment, and a wide T^LECTRICAL Engineer (26), D.F.H. (hons.). Grad. range of other Stores and Equipment. ^ I.E.E., major in R.E.M.E., desires administrative Catalogues (6d. each) may be had when ready from position with responsibility and scope. Technical sales Fuller, Horsey, Sons & Cassell, Industrial Auctioneers, 10, experience, excellent organisation ability and used to Billiter Sq., E.C.3 (Telephone No. ROYal 4861). 2589 handling personnel. Highest references available.—Box 9691, c/o The Electrical Review. F O R S A L E T^NGINEER, age 38, with 16 years’ experience in ad- ministrative posts, desires situation as Works Manager. Traders buying and selling hereunder must observe the Wide experience in all classes of engineering, planning and Restriction of Resale Order, S. R. & O. 1942 No. 958. rate fixing. Special study made of mass production methods jigs and tools. General electrical knowledge. London area CITY OF YORK ELECTRICITY DEPARTMENT preferred.—Box 9693, c/o The Electrical Review. T^NGINEER, with Elect.Mech. University degree, seeks Quarterly and Prepayment Meters position of responsibility commanding four figure HIS Department has for disposal 614 A.C. and 169 salary. 10 yrs.’ exp. in servos, production test gear, electronics. London area.—Box 9728, c/o The Electrical T D.C. M eters of various m akes, types and sizes R eview . ranging from 2£ amps, to 100 amps. A complete .list X-Branch Manager of electrical wholesalers seeks post, of meters available can be obtained from the under­ buying, managing, orders; 4 years with Superlamp signed. E W. A. CROCKER, A.M.I.E.E., Ltd., age 37, married, ex-R.A.F. Commence at once. Office, or travelling considered. Over 20 years’ experience. Electricity Offices, City Electrical Engineer. —J. Banks, 63, Consfleld Av., New Malden, Surrey. 8635 Clifford Street, York.______2919 X-Squadron Leader R.A.F. (25), B.Sc. (Electrical Cooksley & Co. Ltd. offer large selection of used E Engineering), First Class Honours, seeks progressive A • Electric Motors. A.C. and D.C. Write—21/25, post in or near London with prospects in Technical Sales Tabernacle Street. London. E.C.2 (Monarch 3357/58). 46 or Production side of light electrical engineering company. A large quantity of V .I.R . Cable m ade to C.M.A. speci- Technical, organisational and executive experience in fication W /E .4 1 0 1 , by such com panies as General R.A.F. Radar work. Widely travelled. Willing to undergo Electric Co. Ltd., Pirelli’s, Johnson & Phillips Ltd., Over­ period of training.—Box 9683, c/o The Electrical Review. seas Cable Co. Ltd., Simplex Co., Hackbridge Cable Co. 'p'XPORT Engineer (35), conversant with foreign speci- Ltd.. to be sold at cut prices. Brand new condition. fications, Continental Engineering Degree (British Apply—B.S.D./I., General Trade Clearings Ltd., 82-94, national), A.M.I.E.E., excellent linguist, ex-Admiralty Seymour Place. London. W.l (Pad. 3456). 2904 Interpreter, registered Disabled Person (no visible dis­ number of portable Alternating Lighting Sets, fully ability) after R.N.V.R. service (Electrical Branch), seeks A guaranteed, for quick delivery, l£-3kVA. 230/1/50.— responsible position with Technical Export organization. The Electroplant Co., Wembley, Middx. 2897 —Box 8662, c/o The Electrical Review. A number of unused portable petrol-driven Welding Sets. "C^OREMAN Electrician (50), just completed large con- suitable for use with electrodes, sizes 6 to 12.—Fyfe, -1- tracts, seeks similar situation, used to control Wilson & Co. Ltd.. Bishop’s Stortford. 2921 planning, estimating; 34 years’ experience all classes of BOUT 300,000 yards 3/029 red and black and 100,000 work.—Abraham, 9, Dale Road, Crayford, Kent. 8655 A yards 3/036 red and black V.I.R. Cable, brand new, XXONOURS Graduate (Mechanical Sciences Tripos) C.M.A. manufacture, ex stock. Prices and further details— J--i- A.M.I.E.E., seeks a position offering good prospects Box 2025, G.T.C., 82-94, Seymour Place, London. W.l. and opportunity to use 16 years’ experience in design and Paddington 3456. 2890 application of Motor Control and Protective Apparatus.— A C. and D.C. H ouse Service Meters, all sizes, quarterly Box 8648, c/o The Electrical Review. and prepayment, reconditioned, guaranteed one year. TNSTRUMENT Maker desires change, 29 yrs.’ experience Repairs and recalibrations.—The Victa Electrical Co.. 47. -A- on electro-mechanical apparatus, jigs, tools, gauges, Battersea High Street, S.W .ll. Tel. Battersea 0780. 19 development, experimental, servicing. London or N.W. .C. and D.C. Motors, all sizes, large stocks, fully Kent preferred.—Box 9714, c/o The Electrical Review. A guaranteed.— Milo Engineering Works, Milo Road, 1%/f AN with 30 years’ experience London wholesale trade, East Dulwich. S.E.22 (Forest Hill 2278-9). 102 dealing with orders and assisting buying, would be .C./D.C. 5-valve Superheterodyne Sensitive 3-wave glad to hear from interested houses in London and Home A Band R eceiver. E xcellent tone. A ttractive modern Counties area.—Box 9686, c/o The Electrical Review. cabinets in ’’ Plastele ” or polished wood. £16 16s. Usual STOREKEEPER (Chargehand), 18 years’ experience of trade terms and facilities. Early delivery. Trade only.— ^ the electrical trade, desires situation with prospects. Morgan, Osborne & Co. L td ., Southview Road, Warling- Willing to take situation outside London.—Box 8636, c/o ham. Surrey. 110 The Electrical Review. .C. Motors, l/75th h.p. to 5 h.p., all voltages. Also STOREKEEPER-Buyer, conscientious and fully trained A D.G.—The Johnson Engineering Co., 319, Kennington ^ in modern systems, desires post within 2 0 0 miles Road. London. S.E .ll. Telephones. Reliance 1412/3. 57 Manchester. Qualified to take complete charge, ex. refs., LTERNATING Sets, comprising 6 -cyl. vert. Diesel age 34. Salary not as important as an appointment with A coupled to 30-kVA Alternator. 400/3/50, 1,000 r.p.m., scope.—Box 9701, c/o The Electrical Review. brand new. Several ex Govt, surplus.—Box 2895, c/o The Electrical Review. rpECHNICAL Assistant (33), requires position in TTRACTIVE Lampshades, exclusive designs available -1- agricultural dept, of supply company, interviewing, estimating and supervising, good practical and technical A for the Christmas trade. Prompt deliveries.—The British Bright Light Co. Ltd., 266-268, Battersea Park experience.—Box 9716. c/o The Electrical Review. Road. S .W .ll. 2734 "XTACUUM Flasks. Production Engineer, experienced in UDAX Ltd. now have available an extensive range of V big scale output England and Continent, seeks post.— A new season's designs of high-class Lamp Shades in Box 9700, c/o The Electrical Review. Plastics and Parchment, together with a range of Table XTOUNG Lady, Economics Graduate, desires progressive Lamps. Prompt delivery available to all parts of the position. Knowledge of French and typing. Capable, country. Enquiries particularly invited from wholesalers energetic and willing to learn.—Box 9704, c/o The Elec­ and electrical factors.—84, Preston Road, Brighton (Tel. trical Review. Preston 5565). 9583 0 rpm. cmpee t srae odne ad l auxi- all and condenser surface ith w plete com ., r.p.m 300 < l ins 40 W at 4 v.; c 30k Mirrlees-Westing- 350-kW (c) ; . v 440 t a kW 400 lianes. Ul mU.M *itii£ S&IB «iEJ.ä « £tfilgg£tJ. sr**' '■ ** *«*»*»“ . steam lb. 160/220 expansion. triple per., 50 3-ph., v.. 500 ¡t rpe xaso. 8 l. ta ueha. 5 rpm.. r.p.m 250 superheat. steam lb. tJm 185 SSPP«» expansion. triple imn Sem Geeaig e. 4 v. -h, 0 per., 50 3-ph., v.. 440 Set. enerating G Steam Siemens 0-W 'lisMro Ponx ta eeaig Set, Generating Steam Phoenix B'elliss-Morcom 300-kW ldn bikok Eoo sr. u s Ppn, Valves, Piping, ps. Pum isers. Econom brickwork. cluding ih l acsois sicbad n gnr. 2896 air per., 50 gantry. 3-ph., and .. v switchboard 415 accessories, Set. all with Generating Diesel house hDd odcos 60 ot cas Al yn a Dundee. at with lying cable All served single class. jute volts served, 660 jute compounded and conductors, compounded shaDed taped, armoured paper wire compounded 7] 4555). Canonbury (Phone, .l N 32 any London. of delivery ediate m Im oddesdon H wiring. for l.: e T screws or tools Banner no erts. H The catalogue.— Hoddesdon, for rite W td., L Co. s. term Burford. — Electric trade delivery. Generous your ediate m us in­ im 2622. send plete, give com Please Middlesbrough 0 0 .0 0 install can Telephone, 9/1 e stock. W in one we Motors .p.; w and .p. w enquiries; lbs. Sets lbs. 190 Generating 200 evaporation, evaporation. lbs. lbs. 16.000 two evaporation. Surrey. Surrey. ls ijcin 4 y. 20 . m. cl sat complete start, cold ., .m r.p 200 cyl., 4 injection, blast obr 02. 116 84 .l. .C W Yorks. London, Bingley, Mills. oad, R Clyde Steel. Inn John ray’s G 50. 0225. ., td Holborn L Lamps ceze d. tn od Breha. 2790 es Jam quantities.— for quoted Birkenhead. prices Road. xton O Special td.. L . McKenzie new. Review all Electrical The o / c (Phone, 34. .l Box N covers.— proof London, Road, City alk, W Britannia 22-26, Number. td.. L (Telephone ’pool) (L 21 Sons & Liverpool. Seaforth. Thomson Road. Fort starters.—Stewart with ad (n wo qa lnts, o tnin -oe . . .4 .4 .4 4-core, tension Breaker. low Circuit lengths), Oil equal Ellison o tw (in 372213; o. yards N Serial cycles. 50 92 9692 97 Colchester. Street. London. Crouch 28, oad, R Service, trical 91/2. Cavendish 6 6 Balham 246, : Tel. ., .A .T B — .12. S.W trade. lator Cable (London) and ps inations cor­ Lam Illum by Address, Used Electric Large Beeantee made world. Temporary e th stock.—The authorities. over British Ltd.. in all lire e of th always companies by supply quantities and Passed porations quantity. 2659. .; .p w lbs. 200 evaporation, lbs. 12,000 one .; .p w lbs. 175 d e d n a p x E - 52 1066. Phone 523 lrewl) 13 E Send hire. or E sale For and Clerkenwell). Inspection 5512-3 works. our at overhauled. ade m be can thoroughly are tests achines m hand 96 Port- Bulbs, Flashlight Flashlights, ps, Lam IC London. R T 2101). EC inster, T^L estm Abbey W ber. Street, Num Victoria (Telephone 28. .l or S.W 2697) Bootle B 0 mp, P. Sra N. 645 Scnhn Cbe 124 Cable. Secondhand v.. 0 367475; 4 4 ., No. I.C ., Serial .P T ., .P p.. D am 300 p., am 60 Breaker. Circuit Ellison cable; . eview R Electrical The stock. in o / c always rod 2874, and ox strip lec­ B E in sizes M.G. invited.— of 10s.— range Enquiries ide W £49 stock. ., .C D wound. shunt 400/460-volt, Middlesbrough. Specialists. Boiler td., L Co. & Taylor 1 B A B ^ETI Mtr ad nmo. hl oe f the of one hold e W os. ynam D and Motors T^LECTRIC E or nure t Biana auatrn C. td., L Co. Manufacturing Britannia — to enquiries your D ‘ D B B B E B B A 4 q n. ipentd ae isltd la covered, lead insulated, paper impregnated ., in sq 04 T R A C T IV E ^Veekly Offers from The Electroplant Co.. Electroplant The from Offers ^Veekly E IV T C A R T ETI Mtr. 3 h. , ,0 rp. , C. 110 . .C D ., .m r.p 3,000 ., .p h /3 1 Motors. LECTRIC ETI Wedn Pat Egn ad lcrc A.C. Electric, and Engine Plant, elding W LECTRIC R A SS Strip, 0.65" 0.65" Strip, SS A R £ belt. ide w 4" Sanders, or Grinders ELT 20 X of ade m olders, H Striplight Festoon odels, m E E T N 4 A E E export, and e hom for Chargers ATTERY LSN ici Bekr 73 mp. P. IC. 40 v., 440 ., I.C ., .P T p.. am 733 v. Breaker. 220 Circuit and 110 LLISON Bells, Ironclad ittings. F LECTRICAL TH. .-.. 90rpm. 40/6-ot hn wound. shunt 00/460-volt 4 ., 980-r.p.m 8.5-h.p., . .T.H TA A o rhnie evc i nw vial for available now is service prehensive com A .T.A. October NMS l , 5 W, opud bl bearings.— ball compound, , kW 15 ., v o lo YNAMOS, .; .m r.p 1,400 volts, 0 3 /2 200 new, Motors, .C. .. nlmp. nutil hds Fodihs etc.. Floodlights, Shades. Industrial ps. andlam H D.C. ags tcs f e ad eodad tr. Second­ otors. m secondhand and new of stocks largest .. as 10 ot. C. 2 h. , eea available several ., .p h 21 ., .C D volts. 110 also h.p., W Wtr ue olr fr ipsl T 50.000 o Tw disposal. for Boilers Tube Water W. & 0 yls Sra No 338, o lt wt 200-ft. with plete com 363087, o. N Serial cycles. 50 Peebles Bruce and 16s., £65 D.C., require cable, . .R .T T 9 2 /.0 7 with use for Bakelite, et £4 5. onE I. te, ld il, Bingley. Mills, Clyde Steel, It. E. John 15s.— £14 belt. W em bley. M id dx.: (a) 750-kW Beiliss - Morcom Beiliss 750-kW (a) dx.: id M bley. em W --2 , . o 4 m. C. ay is voltage. ains m any ., .C D amp. 4 or 2 1. ., v 2-6-12 volts. Also 220 volts. Stock delivery, delivery, Stock volts. 220 Suplex Also delivery.— pt volts. Prom Accessories. Fires. able rvn 30 ms otu, o lt wih weather­ ith w plete com output, amps, 300 driven. l cass f ol ad qimet o te cu u­ accum the for ent equipm and tools of classes all 5 Kigly rv, uesa, acetr 2689 Manchester. Audenshaw, Grove, ingsley K 15. i lnts f bu 3) fr rmp dlvr from delivery pt prom for 3'). about of lengths (in b. vprto. 1 ls w. ; wo 000 lbs. 50.000 o tw .; .p w lbs. 310 evaporation. lbs. ?1 ubrC. d. 7. ica . Croydon. .. d E Mitcham 675. td.. L Co. Rubber 20 22 1 1946 11, ,rae odne ad l axlais (b) auxiliaries: all and condenser s,Hrface lbs. w .p .; one one .; .p w lbs. X 00 (n ol) n 2 and coils) (in .020" 6 Upr tet Islington, Street, Upper , 000 0 ,0 0 2 6 b. evaporation, lbs. hp,110rpm., 1,100-r.p.m -h.p., E " h 6 6 £ ; cal a ic r t c e l X each.— 8 6 o 31* to wide " .058" ,2 6 2

short deliveries. Send your enquiries to— Be-Be Engineering. Be-Be to— enquiries your Send deliveries. short in Ti sse a aray en ntle i many m in installed been already has system This tion. Soho , /7 6 Ltd., Scemco delivery.— ediate m Im nett. each guaran­ unit each worries, aintenance m Meico td., L prevents and -Micramatic lighting, life lamp deliveries. rated pt for Prom lamp, with output. atched m light characteristics ltd oc Css Sple fr o tae n export. and trade e hom for Supplied Cases. Torch plated . .W N Lane, in er cn esple t cso r’ eurmet with ents requirem ers’ custom to supplied be can gears tion 00 ad tnige, er ed (eehn, Pudsey (Telephone, Leeds near Stanningley, and Ltd.. 2070) mounting Co. & flange Burdette 940-r.p.m. enerators.— G e, g and s/ca Motors 3-phase, D.C. and 1-h.p., also 42 4928). ordsworth (W Middx. enton, K Close, etreat R 3, ag fcois n te onr. x 73 c/o Te lec­ E The o / c produc­ 9713, ediate ox m B im into country.— put the to in eady R factories large drawings. 120 all and 10s. £5 73 nit, U 2034). Ger. Ceiling (Tel. to .l 15s. W Flush £5 nit, London, U Built-in Constead Trough fitted Street, ditto. white, Industrial gear, ett; n enamelled control each stove unit .l W 20-gauge ballast or e; London, typ Street, each Soho , /7 6 instantaneous Ltd., gives co Scem and gear Apply— starter all teed. with Dispenses -1- Cheshire. Congleton, Works, hn. R. 04 100 tubes. with days, in 7 All 118 ” with Delivery 2034. fitted . type, ER G it.” n 2034). U Flush and ER. Phone. G Constead Trough (Tel. “ .l including ” W One London, -1- Street. Soho , /7 6 R ie, oln rns eeti ktls imrin heaters. immersion bowl 49 novelty kettles, controlled dryers, electric (heat hair irons rings, cleaners, electric boiling vacuum lamps, fires, others), table and and standard Street, Victoria 9550. 90, Vic. Tel. td., L Bohm .l. & .W S Brooks London. Distributors— 0 Vcoi Sre, odn S. l Poe Victoria Phone, Ltd.. .l. .T. H .W S Bohm and & London. Brooks lighting e.— tim of Street, good types in Victoria all orders 90. and your Place lamps cycle cases, I London.” London.” 2641 27 new .E.C., G by D.C., new 16-panel, 230/400, 50 Cardiganshire. Switchboard. output , 0 /5 /3 1934. 0 0 ,3 new 6 1066. input Phone Transformer, Type Bingley. Mills, Clyde Steel, . R E. Bush John Shepherds 1834. H (Telephone, Established .12 W 2241). London, Lane, ood W rcl eiw. Review trical sale. for its n U Constead costs; ent Lighting. replacem low for ■^FLUORESCENT life, long users; satisfied -L L -a, t fsd ult, o lt wt jg, tools jigs, with plete com and outlets, 3-bar , fused System ith w Busbar 4-bar, Overhead -L Patented sale. ~CFOR td., L ink.—Scemco P and aylight D hite, W Warm hite. W wholesalers offer, Special Lighting. ■pFLUORESCENT L 9725 Surrey. Sutton, Road. J Palmerston 15. Electrical, eurmns o Ff, lo & o Ld, ishop’s B Ltd., Co. & ilson W Fyfe, to requirements taps, accepted. sink, offers Review. Nearest complete, Electrical The £80. Table /o etc., c 2929, Laboratory shelves, Box — drawers, £80; plugs, plete, com 5014. nad eerm, Beas Sowest. Beebats, “ Telegrams, available. Inland catalogues and list 9550/1441. Detailed etc. batteries, Borth, td., L Co. Supply H Electric Ynyslas & Borth 1932.— 2903 4555). (Macaulay .4 S.W G St., Manor Clapham 150, types all supply We D.C. and A.C. Motors, IC R T EC ^L T G Tl GE. 04. 117 and w. 24"-25 ., w 18"-15 g: tin igh L "pFLUORESCENT 2034). ER. G (Tel. rt—Se o t. 6/ Sh Sre, odn W.l. W London. Street, Soho , /7 6 Ltd., co Scem Write— trfr. e. S 100/. 2920 wall and portable fans, toasters, of range 00/1. 0 1 E .S. G B AR Tel. T Stortford. 19s. I 92 Ntoa Dee St 5 k 80 .. . 6 volts, 460 .. r.p.m 800 , kW 50 Set, Diesel National 1942. H Rdo vr soty vial. Lre ag o torch of range Large available.) shortly very (Radios Generators. Anodising and Plating of number ARGE T CLOECN Lgtn Ftig. tnie range, xtensive E Fittings. Lighting "CFLUORESCENT ^LOECN Coe, 0 t. o nie ee, for level, noise Low att. w 80 Chokes, ■^FLUORESCENT SAL IN etr 50 . eod io, £11. Minor, Record v. 500 Tester, TION NSTALLA ON lmet, nvra, ue ia 2s 9. doz. 9d. 24s. Mica, Pure Universal, ents, Elem N RO NTON lcrc rn, ueir ein n quality, and design superior Irons, Electric N UNCTIO , ige n etnin fo—a a & Sons & say from—Ram extension, and single S, R E D D A upid ih utbe tn. lo ucin Nickel- Junction Also stand. suitable with supplied 3 o. 3. d) 100w Sias nce nichrome, nickel Spirals, 1.000-w. 9d.), 23s. doz. (3 OGE oe, os C. t. o gaate Elec­ guaranteed for Ltd. Co. & Sons Cohen, E EORG oos 1 .. 3pae 400/4 v. 5 cycle, 50 ., v /440 0 0 4 3-phase, h.p., 1 Motors, D E R A E vi w ie ev AVY dt Ac lig lns 20 ms Price amps. 200 Plants, elding W Arc duty Y V EA EW ITTIC Rectifier and Transformer, input 6,300/3/50, input Transformer, and Rectifier ITTIC EW MI TY Cnrl aie wt Tasomr and Transformer, with Cabinet Control Y IT ID UM y: itns ihu tbs Mnmm re, 2 of 12 order, Minimum tubes. without Fittings : ly n o 6-5 . tig, o lt wt tbs Colours: C tubes. with plete com ittings, F w. 36"-45 rm tc.Rois lcrc, 2 & 2b Wet End est W 222b, & 222 Electrics, obins stock.—R From n szs f lcrcl ahnr. lw pe reduc­ speed Slow machinery. electrical of sizes and 6 3 1s cmpee As So Wedr, 4 10s.— £47 elders, W Spot Also plete. com 10s. £36 lcrc ie, aitr, ovco haes floor heaters, convector radiators, fires, electric nit U Testing £100; Recorder, . um H p. Tem Z. & . N rcl ln. oos Gnrtr, wther etc.— Switchgear, Generators, Motors, Plant. trical .; .m .p r 430 and 400 brakes, agnetic m without or with upt 0 W, 3/6, e 14. akrde Pole Hackbridge 1940. new 230/460, , kW 50 output Fra) d, ofr 9004 Send unused. part ost m e th for ps., am 1,200 to up Forfar. td., L (Forfar) d. (3 doz. 18s. 18s. doz. (3 d. 6 83 . 6 ., mmeit delivery.—Horton ediate m im d.), 9 6 66

7 0 E l e c t r ic a l R e\ lew October I I . 1946

T EAD-Covered Cable, 1/.044 single, var. cam. insulated. OTAEY Converters in stock, all sizes: enquiries ^ App. 1.000 yds., various lengths, not been used. 4cL R invited. — Universal Electrical. 221. CSty Eoad. yd.—Wilkes. Derby Ed.. Stapleiord. Nottingham. 8660 London, FLG.1. 16 ESLIE Dixon & Co. for Dynamos, Motors. Switchgear. LACKS and Bags in excellent condition for all com­ L Chargers and Telephones.—214. Queenstown Eoad. S modities. as low as 4d. each. Write—John Braydon Battersea. S.W.8. Telephone. MAChulay 2159. Nearest Ltd.. 230. Tottenham Court Eoad. W.l. TeL No. Ely. Sta.: Queen’s Eoad. Battersea (S-R.). IS Museum 6972. _ 79 AY we send cur Flngiaeers’ Stethoscope on approval ELF-Priming Electric Pumps. 300 g.p.h,, £14 5s.—John M iwithout obligation' ? Particulars on request.—Capac S E. R. Steel. Clyde Mills. Bingley. Phone 1066. 53 Ltd.. 2. CUswater Eoad. London. S.W.13. 78 PIRAL Elements for electric fires, boiling rings, and OTOR Generator Sets and Convertors, all sires and S other appliances, supplied to order.—Electrothermal M voltages from i kW np to 500 kW in stock.— Engineering Ltd.. 270. Neville Road. London. E.7. 54 Britannia Manufacturing Co. Ltd.. 22 26. Britannia Walk. ^PLRALS. first quality. 500. 600. 750 and 1.000 watt. City Eoad. London. N.I. Telephone. QerkenweB 5512. ^ all voltages, for immediate delivery.—Box 59. c/o 5513 & 5514. 28 The Electrical Review. OTOR-Alternators (four). 230-v.. 50-cs.. 3-h.p. S2PIRALS. 230 50 volt, 1.000 watts. 106s.; 750 watts. M motor, auto starters s.-ph.. 180-v.. 500-c/s.. l*-kW ^ 80s.: 600 watts. 60s. per gross, carriage paid.—Box alternator, excitation 110 v.. 2.5 a., from 230-v. trans. and 9675. c/o The Electrical Eeview. selenium rectifier. mounted as one unit. As new. £55 each. O lA FF Time Checking and Job Costing Time Recordas —107. Commercial Read. Southampton. Phone 4407. 9720 ^ (all makes) for quick cash sale. Exceptional con­ '\rOTORISED V Bench Drilling Machine, 13 speeds, dition. Write — Box 528. Smiths. 100. Fleet Street, £15 5s.—John E. E. Steel. Clyde Mills. Bingley. London, E.C.4. 31 Phone 1066. 51 TEAM Generating Plant. The following is a selection V'AMEPLATES. Engraving. Dlesinking. Stencils, Sted S of sets available in our comprehensive stock : 2.000-kW Punches,—Stiiwdl & Sons Ltd., 152, Par Gosford B.T.ELTurbo-Alternator. 6.600/3/50. ISO / 210-lbs. presure. Street. Coventry. 14 complete with surface condenser and all auxiliaries, seen 'V ’EW lS-c, Gold Chroncgrsphe Wrist Sop Watch, split running. 1.250-kW Brush Ljungstrom Turbo-Alternator, — ' second timekeeper, calibrated 1 1.000 sec. flyback, 400 3 50. 200 lhs. pressure, complete with surface conden­ etc., etc. (cost 125 guineas), superb looks and perform­ ser and ail auxiliaries, seen running. 750-kW Adamson./ ance, guaranteed, £65: Eversharp (U.S.A.) 14-c. Gold Mather k Platt High-pressure Pass-out Turbo-Generator. Streamline Model Fountain Pen. £12 10 s.: ditto PendL 200-lbs. initial steam pressure, passing out 25.000 lbs. per £S life.—B. W. Thomas. 40, Kensington Park Gardens. hour at 80-lbs. pressure, 500 volts, three-wire D.C.. with London. W.ll. 8646 balancer, complete with surface condenser and all auxili­ NE practically new Kohler Electric Lighting Plant. aries. First-class condition. Full particulars from— O 10 kW. guaranteed in perfect condition. Can be Stewart Thomson k Sons (Liverpool) Ltd.. Feat Eoad. seen by appointment near Corwen. North Wales. Nearest Seaforth. Liverpool 21 (Tele. No. Bootle 2697): or 28, offer to £450 accepted. Apply in first instance to—Herbert Victoria Street, Westminster. London. S.W.l (Tele. No. k Mil’s Ltd.. Church Eoad. Ashford. Middlesex. 2S40 Abbey 2101). 98 NE ton of polished Bakelite Cuttings, mostly in pieces SUPERIOR Type Builders' Ladders now in production: O 6" X 8 ' x 4' X i~ thick.—John J. Dewhurst. The ^ also Steps, Trestles and Extension Ladders. Phone— Mfll. Dnddington. Stam ford. 28S2 Shaftesbury Ladders Ltd., 453, Katherine Eoad. K7. /~VSMOB Eadio Heart equals complete first-class 5-valve Grangewood 3363/4. 15 ^ Superhet. positively only small condensers and resist­ WO 20-kW, 120-v.. D.C. Steam Turbo Sets and panels» ances to find. Super-efficient components. Building in­ T Dynamo. 7.8 kW. 250 v.. 550 r.pjn. comp.; 20-h.p. structions. £5 16s. Cabinets. Trade invited.—Morgan A.C. Motor. 200 1 50. S.R . 725 r.p .m .: 5-h.p. Petter Osborne Ltd.. South view Ed.. Upper Wariingham 2560. Diesel Set. 200 220 v. A.C. on bed: various D.C*. switch­ Surrey. 101 boards. Volt and Ammeters. Circuit Breakers and Cut-outs. T3ETBOL Electric Generating Sets, from 120 w to 1.5 kW. 150-kW Alternator. 440 v.. 3-ph.—E. Binns. 156a, Fais- new designs, good deliveries.—Arthur Lyon k Co. grave Road. Scarborough. 9717 iEngs.> Ltd.. Africa House. Kingsway. W.C.2. 70 T^NUSED D.C. Motors. Fifteen 21 h.p.. 220 volt.; six HONE 9S Staines, 90-kW Euston Diesel Set. 110 vo. ^ 21 h.p.. 105 volt, and many others.—Fyfe, Wilson k P D.C.: 25-kW Mirrlees ditto. 110 vo.: 7/9-kW Euston Co. Ltd., Bishop's St Gifford. 2922 ditto. 110 vo.: 5-kYA Boston ditto. 400/1/50: Weir Feed I | SED Double Flanged Bobbins, good condition. 2,000 Pump. Si" x 6' x 13*.—Harry H. Gardam k Co. Ltd.. y gross approx. Measurements 31" overall, 3i" traverse. Staines, 60 3" diameter flange. Will sell all or part.—Joseph Harari. X>HOTO Copying (Blue Print) Machine. 35"feed.together 42. Whitworth Street» Manchester. 99 with Electric Washer and Dryer. 46" wide. both by Y^ACL LM Cleaner Parts. Hoses, braided, all diameters. Precision Photo Printing Plant Ltd., complete with electric * Commutators, bearings, fans, carbon brushes, driving equipment for 240-volt D.C. Inspection invited.—Box 2853. c o The Electrical Eeview. belts, brushes, attachments and fittings for all makes. Wholesale only.—Vacuum (leaner Supplies, 543» M oseley T>LATTNG Generators, unused, several ranging freon 350 E oad. Birmingham. 12, 80 to 700 amps.. 6 to 12 volt, plain or with A.C. or Y^EEY good secondhand Euston k Hornsby water- D.C. motor drive. Particulars from—Stewart Thomson (Liverpool) Ltd.. Fort Eoad. Seaforth, Liverpool. 21 ’ cooled, four-cylinder, totally enclosed, vertical Diesel (Bootle 2697): or 28» Victoria Street. London. S.W.l Engine, size 4. Class VSO No. 194748. 27 h.p.. radiator- (Abbey 2101). 63 cooled. direct coupled to Lancashire Dynamo and Crypto 17-kW. 480/240 volts, 35.5 amps., open protected con­ UANTITY erf Double Boiler Chain 11" wide. 1 pitch tinuous rated Generator, running at 1.000 r.p.m., size Q i" rollers.—15. Kingsley Grove, Audenshaw. Man­ D.5S No. 142516. dated 193S: complete with switchboard, chester. 2690 fuel tank exhaust pipe. etc. Fowler Sanders vertical. T > EBL-Il T Motors and Generators. Long deliveries can 6-cylinder, totally enclosed Diesel Engine, type 6 BJL often be avoided by purchasing rebuilt secondhand No. 2143. 75 b.h.p.. direct coupled cm combined bedplates. plant. We can redesign cr replace surplus plant of any Crompton Parkinson screen protected, compound wound size. Send us your enquiries. O va-1.000 ratings actually Generator. 50-kW. 480-volts D.C. or 220-volts D.C. oil- in stock here.—Dynamo k Motor Kepaiis Ltd.. Wembley cooled Static Balancer, back erf board shunt field regulator Park. Middlesex (Telephone. Wembley 3121. 4 lines); also m ounted on cast- iron bedplate, etc.. coding tank, exhaust at Phoenix Works, Belgrave Terrace. Soho Bead. Hands- silencer, push-button starter with 12-volt, 100-amp. hour worth. Birmingham (Telephone. Northern OS98). 26 battery. These sets are little used and are 95% new.— ECONDITIONED Sectional Nisen Huts and other ex- Taos. W. Ward Limited. Brettenham House. Strand, R Goverament buildings for sale. Several available ex London. W.C.2, Telephone number. Temple Bar 9631. stock. Nissens. 36' x 16'. £65-£73. delivered. No licence 2609 required. Write for further details or call to view proto­ IU E E Mergers, Evershed. 500 v.. 20 meg., in carrying type erected at—J. Thorn k Sons Ltd.. Box SO. Brampton ’ case. £12 5s. 6d.. ex stock (new).—Robins Electric. Eoad. Bexleyheath. Kent. 47 222. W est End Lane. N .W .6. 82 OTARY Converters, 200-kW. 6.600/3/50 input, 230 9 Reconditioned Kango Electric Hammers, 200/250 v.. R volts. 2-wire D.C. output, complete with Trans­ w in perfect working order. Price £20 each.—City Elec­ former and switchgear. seen running in Liverpool 2.000- trical k Engineers’ Supply Co.. 77. Minories, E.C.3. 2740 kW. 6.600/3/50 input. 418/462 volts, three-wire D.C. ~l -h.p. A.C. Motor, Crypto. 950 r.p.m., slipring type. output, complete with transformers, starting panels. D.C. protected, ring oil bearing, with starter, and 15-h.p. machine panels. First-class condition. Two sets avail­ A.C. Motor. Brook. 940 r.p.m.. slipring. ball h i ring, with able.—Stewart Thomson k Sons (Liverpool) Ltd.. Fort starter, both 200 1220 volts, single-phase, 50 evde*. Best Road. Seaforth. Liverpool. 21 (Bootle 2697): or 28. Vic­ offer.—Tucker Bros. Electrical Engineers (Essex) Ltd.. toria Street, London. S.W.1 (Abbey 2101). 72 Hornchurch. Essex. ¿845 October 11. 1946 E l e c t r ic a l R eview 71

C-kW and 2J-kW. 230/250-volt D.C. Generating Sets. ATERCURY (Quicksilver) wanted. Write for packing complete with 4-cylinder. 10-h.p. Austin Engines, instructions. Gold. Silver and Platinum also pur­ with petrol tanks, radiators, fans and switchboards. Large chased.—Collingridge S: Co. Ltd.. Riverside Works. River­ number available.—Britannia Manufacturing Co. Ltd.. side Road. Watford (Tel. 5963). 20 22/26. Britannia Walk. London. N.I. 103 V E W or secondhand, variable speed. 400-volt. 3-phase 1 Pl-kW portable Diesel-driven Generating Sot. comprised Motor, fully rated maximum 10 b.h.p., anything A*-* of vertical 4-cylinder Dorman Diesel Engine. 1.000 between 8 and 20 b.h.p. would do. Also 1 b.h.p. geared r.p.m.. coupled to 15-kW Alternator. 400/3/50. complete unit.—Fraser & Borthwick Ltd.. 12a, College Square with Switchboard Radiator and all accessories (3 available). North. Belfast. 2928 Full details—B.C.S. (Engineers & Contractors) Ltd.. T> EQUJLRED: Mica Electric Iron Elements: Toaster Central Offices. Taffs Well. Cardiff. Tel. TafEs Well 296. J-U Elements: Spirals, nichrome wire: Cotton-covered 2826 Flexes: Brass, Copper and Steel Sheets, min. size 9" x 6 "; Q /Vh.p. G.E.C.. 3S0-v.. 3-ph.. 50-per.. 960-revs. A.C. Alu. Strip. 5" x £": Machinery, new and used; Timber: protected type, sleeve heating S.C. Induction Motor, Glazing: Rubber Grommets: Asbestos: Switches: Iron with han ad-operated star/delta starter.—Win wick Street Connectors, etc.. etc. Offers to—British Diamix Ltd.. Tannery Ltd.. Warrington. 9709 Metrum Works. Beatty Street. N.W .l. Euston 5951. 44 |-kW Alternator by E.C.C.. 3-phase. 50 cycle. 415 TTRGEXTLY wanted for Power Station extension, one 5 0 1volts. 750 r.p.m.. direct-coupled exciter, v-rope 25.000/ 30.000 lbs. capacity Babcock k Wilcox Water drive, complete with control panel.—Box 9727. c/o The Tube Boiler. 200 lbs. working pressure, temp. 580° F.. Electrical Review. complete with superheater, chain grate stokeri. etc.—Box l-kW Rotary Converters (2). with transformers and 2932. c/o The Electrical Review. 250' switchgear. input 6.600 volts. 3-phase. 50 cycles, \\T ANTED. D.C. and A.C. ball-bearing Motors. Full output 420/210 volts: also A.C. and D.C. Motors. Switch­ * * details to— Britannia Manufacturing Co. Ltd.. 22/26. gear. Generating Sets. Welders, etc.—Midland Counties Britannia Walk. London. N.I. 29 Electrical Engineering Co. Ltd.. Grice Street. Spon Lane. AA^^'TED. Eohler Lighting Plant. 110 v.. 1.500 w.. West Bromwich. its ' * good s/hand, off service, reasonable, dynamo 3 kW. Electric Motors. Dynamos. Transformers, Con­ 110 v. comp., 600 r.p.m., 54 cells. 150/300 ah.—Box 9718. 500 verters. etc.. etc.. at low prices.—S. C. Bilsby. c / o The Electrical Review. A.M.I.C.E.. A.M.I.E.E., Crosswells Road. Langley, near W A N TED . Rotary Converters, any size.—Universal. Birmingham. Phone. Broadwell 1359. 21 * * 221. City Road. London. E.C.l. 22 I only, strong returnable Cases, inside measure 16" to 1-h.p., 220- and 110-volt. Motors or equivalent 500 x S" x 13" deep. 3" and 1" thickness, no battens, 2 Dynamos.—Fyfe. Wilson k Co. Ltd.. Bishop’s Stort- blind handholes for lifting, lids secured with counter-sunk ford. 2924 wing nuts to 3/16" bolts. No licence required. Price to -h.p.. 230-v. A.C. or D.C. Motor.—Universal Electrical. clear. 2s. 6d. each, delivered nearest station 150 miles 1 221. City Road. London. E.C.l. 25 radius London.—Home Produced Boxboards Ltd.. 10. heavy duty push-button operated Contactor Starters Arthur Street. London. E.C.4 (Mansion House 0779). 2873 4 for 30-h.p.—40-h.p.. 3-phase. 50-cycle motors.—Box 9 ,A A -t°n Upstroke Moulding Press. David Bridge k 2879. c/o The Electrical Review. 1 vJVJ Co. Steel Steam Heated Platens. S ft. x 5 ft.. X-ft. Fluorescent Tubes, any quantity, new. retail prices. 33" daylight. 6 rams. 2 ton working pressure. Seen ^ carriage at our expense.—Box 8654. c/o The Electrical working. £6.000.—Box 2S05, c/o The Electrical Review. Review. Q Met.-Vick, outdoor type Transformer. 0 _ | 15-amp. Interlocking Double Pole Switch Plugs in iJ jt/U U input voltage 2 2 .0 0 0 or 1 1 .0 0 0 volts, output iron boxes, galvanised, but not essential; 36 one- 6.000 volts, new 1931 (2 available); 100-kVA Westinghouse gang square sunk Dolly Switches in iron boxes: 24 two- indoor single-phase Transformer, input voltage 6.600. out­ gang ditto: 24 three-gang ditto; 1" Galvanised Tubing. put 400 volts, new 1921 (3 available). Full details— Licence available.—Bowie Electrical Service.Roscoe Street. B.C.S. (Engineers & Contractors) Ltd.. Central Offices. Scarborough (Tel. 1264). 2880 Taffs Well. Cardiff. Tel. Taffs W ell 296. 2827 O /V h.p. Motor. 400 3/50. 960 r.p.m.. surface cooled. " A A A good strong Crates, inside measurements 29" with control gear.—Fyfe. Wilson & Co. Ltd.. x 9J" x 9|", £" thick, battened all round, Bishop’s Stortford. 2923 at Is. 9d. each, ex works.—K. Goldser & Sons. 14a. Rec­ O r v 35-h.p. Squirrel Cage Motor. 400 volts. 3-phase. 50 tory Square. London. E .l (Tel. Stepney Green 2550). 75 cycles. 1.450 r.p.m.—Gillette Industries Limited. ARTICLES WANTED Gillette Corner. Great West Rd.. Isle worth. Middx. 2876 .C. Generating Set. gas or petrol driven. 200 kVA. Tubular Heaters. 12 to 14 ft. lengths.—Allen A 400/3/50.—Box 2760a. c/o The Electrical Review. & Son. 74. Leonard Street. E.C.2. 9715 .C. Motors urgently wanted, any condition, 400/3/50 WORK WANTED AND OFFERED A type, sizes from 1 to 20 h.p.. speeds 1.500 and 1.000. A LL makes and kinds of Electrical and Radio Measuring State price. — Bowie Electrical Service, Roscoe Street. Instruments repaired by skilled technicians. A.I.D. Scarborough (Tel. 1264). 2881 approved. All work quoted by return without charge. i CETATE and other thermoplastic scrap: polythene Also for sale, large variety of Voltmeters. Ammeters. ^ and P.V.C. in any form; also scrap cable and in­ Milli-ammeters. 2" and 2}" dials, reconditioned ex-Air sulated wire: urgently wanted.—Elton Levy & Co. Ltd.. Ministry stock.—C. Gertler. Dept. A. 29-31. Cowcross St.. 18. St. Thomas Street. S.E.l. 30 E.C.l (Tel. Cle. 67S3). 9670 ALTERNATOR. 250/300 kVA. 400/3/50. 375 r.p.m — A RMATURE. Rotor. Stator Rewinds and Repairs, from ^ Box 2760. c/o The Electrical Review. fractional to 100 h.p. With the return of our old staff /CELLULOSE Acetate Off cuts urgently wanted. Send and extended premises we can offer prompt, reliable service. ^ samples and prices to—Box 107. c/o The Electrical —T. A. Boxall & Co.. Horley. Surrey (Phone 654). 2727 Review. A RMATURE Winding: Vacuum Cleaners, etc.. single or "C'LECTRIC Welder, input 400 v. D.C.. output 120 amps. quantities.—Vac. 80. Cranbrook Road. Ilford. 9612 continuous rating. Must be in first-class condition, ASTING capacity available now. Tiny articles, to base with or without switchboard. Apply—Runbaken Elec­ C castings of 2 0 0 lbs. in standard aluminium, long or trical Products. 71. Oxford R oad. Manchester. 1. 2556 short runs. Maybe your production problem can be cast. XGINEERING Technical Books (new or secondhand) Write in first instance, giving fullest details, to—S. Leon. wanted in any quantity. Attractive cash offers. Call 31. Park Parade. Harlesden. N.W.10. 9706 —Third floor, 356. Oxford Street. W .l. or ** Stoneleigh.” T^LECTRICAL Engineers seek designs for production of St. George’s A venue. W eybridge. 62 small A.C. starters. 3-phase and single-phase, auto­ 'C'TRE Bar Elements (Flat). 9" x 3". 1 kilo.: also 5 to matic push-button type. Would also consider manufacture 15-amp. Switches. Large or small quantities. Offers of any fight electrical device that can be produced at to—Supreme Electrical Manufacturers. 3. Downs Road. competitive prices. Write first instance—Box 2795. c/o Epsom. Surrey (Phone. Epsom 1358). 9712 The Electrical Review. NGINKER S. Precision. South England, seek manu- T?LUORESCENT Lamps. 5 ft., urgently required, any facture of electrical, mechanical or domestic quantity retail prices paid. Collected London area. assemblies or components. Pres tools, gauges, small —Box 111. c/o The Electrical Review. stampings, capstan turning, also Internal and External T AMIN VITONS. ty p e s 75A.4A.. required in substantial Grindine. Write— Box 74. c/o The Flectrical Review. L i‘ quantities. Small quantities also considered.—Comer- T AM PS HADE Wires, any design, from own drawings or croft. Fallibroome Road. Macclesfield. 95 ^ samples. Enquiries invited.— Regent Wares. 57a. A r

T IGHTING Fittings. Table Lamps. Bedlights. AH Types T> EPRESENTATIVE 6 required all areas, with good con- of Shades; home or export orders undertaken; shades ! JT/ nections electricians, garages, ironmongers, engineer­ made to customers' requirements. All goods are in the ing works, etc. Car essential. Reply, giving full details most exquisite and up-to-date designs and finishes. Shades of past selling experience, age, etc.. to—Box lOo. c/o are hand-painted in various designs to suit all customers. The Electrical Review. Send your inquiries to — Decorshade Ltd.. Bromford i House. Bromford Lane, Erdington, Birmingham. Tel. No. BUSINESSES FOR SALE AND WANTED Erd. 1516. 2744 well-known firm of Electrical Wholesalers, desirous of EWINDING Specialist. For all types of electnc t A extending their interests, wish to acquire controlling R motors, stators, armatures, machine tools and vacuum j interest in another firm of established Electrical Whole­ cleaners. Guaranteed work. Any spares supplied and salers (London or Provinces). Existing personnel could fitted. Trade terms. Prompt service.—W. J. Rich. So, be retained. Absolute confidence guaranteed. Banker’s. Egerton Road. Bristol. 7. 8657a , Accountant’s and Solicitor's reference can be given.— T ) EWINDS. We specialise in Vacuum Cleaners. Hair Box 2703. c/o The Electrical Review. J-*/ Dryers and Clippers. Redesigning on all fractional ; TT'LECTRICAL Contractors’ Business for sale. Turnover motors, also stator, rotor and armatures from £ h.p. to £17.000 per annum. Central London. High-class 10 h.p.—Bright Bros., 50. Orfprd Road. Walthamstow. clientele. Please reply in writing to—Box PN.441. Deacon’s London. E.17. 9719 Advertising. 36. Leadenhall Street. E.C.3. 2858 OHOT Blasting. Metal and Paint Spraying. We are able X^STABLISHED Electrical and Radio. Sales and Service. ^ to undertake the effiicient and prompt handling of Main Road vSurrey). Double-fronted shop, large all goods sent for treatment. Large capacity available workshop, and self-contained flat. Long lease, low rent. Enquiries to—Commercial Structures Ltd.. Staffa Works, | Good class residential area. Present turnover approx. Staffa Road. E.10. 112 £2.000. Price, including fittings and fixtures. £1.875. AGENCIES Stock at value.—Box 9726. c/o The Electrical Review. A DVERTISER. experienced electrical trade, proceeding L^OR Sale, old-established Automobile Electrical Service West Indies, centring Barbados, spring 1947. desires J- Station, exceptional opportunity for power and to contact firms wanting Representative, with view to electric vehicle repairs.—Sheppard. 918. London Read. agencies.—Box 8637, c/o The Electrical Review. Leigh-on-Sea. 2823 GENCIES required for London, South of England, for I rANUFA CTUR ING Business specialising in Dry Bat- A the following: (1) Domestic electrical appliances; i teries and Electrical Accessories. Freehold factory (2) Brass electrical accessories, switch plugs, etc.: (3) Con­ ! South London. Large contracts on hand for export and duit. Advertisers have clientele with every wholesaler in home markets. Excellent profits. Price £22.850 all in as the territory mentioned. Immediate turnover can be going concern.—Box 2863. c/o The Electrical Review. guaranteed. Either commission or buying basis. Post­ war arrangements considered.—Box 64. c/o The Elec­ BUSINESS OPPORTUNITIES trical Review. T^NGINEER. specialist in f.h.p. electric motors, geared GENCIES required. South of England, including the t-J units and allied devices, wishes to become associated A London area: (a) Cables; (b) Small Switchgear; (c) with snail manufacturing concern capable of producing Transformers; or any lines suitable for distribution for these products and wishing to expand.—Box 2851. c/o wholesalers’ business.— Box 40. c/o The Electrical Review. The Electrical Review. 4 GENT with first-class Scottish connection, wholesale. ^ trade, corporations, etc.. wishes representation.—Box 'PROGRESSIVE wholesale house, opening trade counter. 9694. c/o The Electrical Review. wishes to hear from actual manufacturers of Lighting PPLICATIONS invited from interested parties wishing Fittings. Appliances. Accessories. Cables Flexible. Shades. A to be appointed as Agents for the Harbilt Electric Switchgear. Lamps, etc. Please give fullest details possible. Truck. Reply to—Harborough Construction Co. Ltd.. ‘ Appointments will be made for travellers to calL—Box Harbilt Works. Market Harborough. Leics. 2739 9707. c/o The Electrical Review. IRMINGHAM Area. Energetic young man wanted, OCEMCO Ltd.. Fluorescent Lighting Specialists, wish to B preferably with connection with Electrical Whole­ ^ contact manufacturers of electrical equipment and salers and Contractors, to act as Sub-Agent for remunera- | accessories, including " Novelty ” and “ Improved '* tive repeating line, commission basis.—Box 2933, c/o The appliances. Domestic fluorescent fittings and components Electrical Review. of particular interest. When posible complete output will KTAS Turk Limited. Istanbul. Posta Cad. Valide Han be taken, and full co-operation given in exchange for sole E 74/75. Turkey, have an experienced sales and en­ distribution rights. Replies will be treated with strictest gineering staff, together with an established connection in confidence.—Man. Director. Scemco Ltd.. Scemco Horee. the wholesale trade, desires agencies from Manufacturers 6/7. Soho Street. London. W .l. 119 with a view to sole selling rights (either commission or O M anufacturers and Shippers. A British ex-officer buying) for the following: (1) Thermal and hydraulic T with headquarters in Rangoon is in a position to power plants. (2) Collieries and railway equipment. (3) undertake business negotiations and/or representation in Heating, air-conditioning and refrigeration. (4) Electrical regard to selling commodities of all kinds. He can also accessories, switches, plugs, etc. (5) Conduit and fittings. i provide market appreciations and advise on trading con­ ( 6 ) Wires and cables. (7) Pneumatic transport equip­ ditions. or undertake any form of confidential business m ent. 2715 mission. Burma presents virtually a monopoly market for X^LECTRICAL Wholesalers desire to contact manufac- British goods, and there is urgent need for practically -LJ turers of high-class Electrical Equipment-Accessories j every kind of manufactured article. Enquiries should be and Domestic Appliances to arrange for sole distribution ! addressed to—N. S.. c/o C. J. Lytle Ltd.. 24/25. New to retail trade for North England, also export.— Star Bond Street. London. W.l. 2855 Domestic Appliances Ltd.. 28 Deansgate. Manchester 3. 8641 , NDUSTRIAL Enterprises (Whitehall 3678) have pleasure BUSINESS PREMISES I in announcing that Mr. C. Seshachalam, M.A.. B.L.. TRACTORY Extensions. Warehouses. Canieens. etc.. of Messrs. Curzon «k Co.. Mount Road. Madras, has erected complete. Plans and licence applications appointed them sole representatives for all electrical, elec­ prepared. Consult— The Universal Housing Co. Ltd.. tronic and mechanical engineering and business matters.— i Rickmans worth. 109 17. Irving Street. Leicester Square. W.C.2. 2664 I ANUFACTURERS’ Agents, covering the whole of T EASE for sale. W .l district, basement, ground floor M Great Britain and Colonies, are desirous of contact­ and 1st floor, each about 900 sq. ft. Rent about £500 ing manufacturers with a view to sole selling rights (either per annum inclusive. Suitable for small electrical whole­ commission or buying), post-war arrangements considered. salers. Possession end of 1946. Agreement runs till August. —Box 23. c/o The Electrical Review. 1950. Offers to—Box 2875. c/o The Electrical Review. ANUFACTURERS' Agents, with offices London and YY^ITH vacant possession. Freehold Factory and Land M South Coast, wish to hear of additional lines, includ­ ’ * comprising the works of the Remington Union Metallic ing Cables and Domestic Appliances, for sale to corpora­ Cartridge Co. Ltd.. Stockingswater Lane. Brimsdown, tions. wholesalers and retailers.—Box 9676. c/o The Elec­ M iddlesex (10 miles Central London). Road, rail and water trical Review. facilities. Floor space of buildings about 10.750 sq. ft. ANUFACTURERS' Agents, with very good connection Land 8 acres. For sale by auction 7th November, 1946. best wholesalers and leading stores in Yorkshire and Particulars and conditions of sale by the auctioneers— Lancashire, require all electrical lines on commission basis, Waite & Waite. 36. Cavendish Square. London, W .l (TeL including wireless sets, vacuum cleaners, immersion heaters, Mayfair 4912> and James Neilson. 2. Palace Mansions. hair dryers. 2-kW reflector and other type fires, heaters, Enfield. Middlesex (Tel. Enfield 4040). 2856 cookers, heat-controlled electric irons, chrome lighting fit­ tings. glassware fluorescent fittings, electric razors, bake- PATENT NOTICES lite accessories, electric lamps, batteries, toasters, kettles. ! ATENT Agents.—A. E. Hill. Chartered Patent Agent. etc.. etc.: also any lines at all considered. We can do the P 27. Chancery Lane. London. W.C.2. Tele. Chancery business.—Box 9690. c/o The Electrical Review. 8444. 65 October 11, 1946 E l e c t r ic a l R e v ie w 73

PARTNERSHIPS A .M.I.E.E., wide experience, desires position with view to, Partnership in small progressive business.—Box 9697. c/o The Electrical Review. A f"ICA. Valuable new Mica Agency requires London -1- associate with small amount of capital to undertake sales and generally to establish the business.—Box 9689. c/o The Electrical Review. M /SCELLA »EOUS \fR - E. W. Krebs. A.M.I.E.E., wishes to announce change of his address. His consulting services for designs, developments, layouts and production of electric machines are now available at—42. Selcroft Road, Purley. Surrey (Tel. Uplands 0789). 2857 OHORTHAXD Typists, Private Secretaries. Clerks, etc. ^ If you are in urgent need of staff, contact Embassy Secretarial Employment Bureau. Excel House. Whitcomb Street. W.C.2 (Abbey 6745: also Riverside 2330). We specialise in efficient personnel. 90 EDUCATIONAL NOTICES NGINEERING Careers and Qualifications. Both E Government and industry have announced and emphasised that young men with technical knowledge and qualifications must receive every chance of rising to the highest posts within their capacity in post­ war engineering and allied industry. Write to-day for “ The Engineer’s Guide to Success ”—200 courses—free— which gives particulars of the first-class training supplied by the T.I.G.B. for the A.M.I.E.E.. A.M.Inst.C.E.. A.M.I.Mech.E.. A.F.R.Ae.S., A.M.I.P.E.. B.Sc.(Eng.), C. & G.. etc.. examinations in which T.I.G.B. home-study students have gained 44 first places and over 1.000 passes. LITHOLITE INSULATORS & The Guide covers careers in all branches. Electrical. Mechanical. Radio. Aeronautical, etc.—The Technological ST. ALBANS MOULDINGS LTD Institute of Great Britain. 35. Temple Bar House. London, E.C.4. 77 T ATEST A.M.I.E.E. Results. In the recent examina- J-4 tions held by the Institution of Electrical Engineers 477 candidates sat who had taken B.I.E.T. courses. Of these WATFORD 457 were successful in passing the examinations. We believe this record of 457 successes out of 477 entrants has never 'PHONE: WATFORD 4494 before been approached by any oral or correspondence tutorial organisation, and indicates the very high efficiency of the modern system of technical training which we have laid down. The B.I.E.T. tutorial organisation is waiting to assist you either with a short specialist course or com­ plete training for a recognised examination. We have available a large full-time staff of instructors, while the efficiency of our extensive organisation is a byword among engineers. We guarantee—“ No pass—no fee.” May we send a copy of “ Engineering Opportunities” ? Containing a great deal of useful advice and detailed information on over 200 home-study courses and examinations, this hand­ book is of very real value to the ambitious engineer. Our highly informative handbook will be sent free and without \ S r l e y obligation on request.—British Institute of Engineering k. ▼ REGD. TRADE MARK Technology (established 1927—over 200.000 students), 12. Shakespeare House. 17, 18 & 19, Stratford Place. Oxford Street. London. W .l. 33 X>LASTICS offers particularly good prospects to experi- enced Engineers with a sound knowledge of Plastics Technology. Authoritative home-study courses are now available in General Plastics and specialised branches of the science. Full details of these courses and the prospects in the rapidly-expanding plastics industry will be found in COILS our handbook “ Opportunities in Plastics.” sent free on request. British Institute of Plastics Technology (Dept. DETERMINE 301). 17. Stratford Place. London. W.l. 2811 PERFORMANCE ★ ACCURACY ersi >eecf ★ UNIFORMITY ★ RELIABILITY SPECIAL ★ SERVICE CORED ★ COMPETITIVE PRICES SOLDER TheVarley Magnet Company A . I . D . a p p r o v e d PROPRIETORS H. J. ENTHOVEN & SONS LTD. 230' t HORNTON ROAD, WEST CROYDON. SURREY THOrnton Heath 2462 WOOLWICH 1422 CAMBRIDGE ROW WOOLWICH S E 18 7 4 E l e c t r ic a l R e v ie w Octobej 1 1 ,1 9 4 6

ledro uua S^ çxtoji COMPONENTS

WRITE Saxon Silent Chokes and FOR LISTS Ballasts are now available for use with 8o-watt Fluor­ escent Lighting Tubes in PLEASE NOTE Pending full produc­ all standard voltages. tion only limited They should be specified number of models are available in restricted when absolutely noiseless q u an tities functioning is desired.

Maximum Efficiency and— SILENCE

SAXON COMPONENTS LTD. 66 Victoria Street, London, S.W .I Telephone : Victoria 0804 Electroway Heaters, Loughborough, England

Be oft the

a n d ALL OTHER TYPES and GRADES COG-W HEEL OF HAIRSPRINGS IN PHOSPHOR BRONZE,CADMIUM COPPER AND BERYLLIUM COPPER PHOSPHOR BRONZE COLLETED AND UNCOLLETED.

For all your non-ferrous replacem ents specify "COG-W HEEL” Brand PHOSPHOR BRONZE and know you are getting the best.

Write for our latest abridged general 100°/o BRITISH Catalogue. MANUFACTURE L____ BRITISH PRECISION SPRINGS LTD ( THE PHOSPHOR BRONZE CO..LTD. V WITTON, BIRMINGHAM. 6 317 Edgware Road, London, N.W.2 ' A BlftFlELD CQMRAMY ) ______. Phone: CLAdstone 3333 Crams: "Chronovar, Crickle, London” Oc lober 11, 1946 E l e c t r ic a l R e v ie w 75

Not to the same extent as in th e good old d a y s of course, but supplies are im proving.

CLOCKS

Productt o I TELEPHONE MANUFACTURING CO., LTD. N o . 630 Marketed by T.M.C.-HARWELL (SALES) LTD., 233, SHAFTESBURY AVENUE, LONDON, W.C.2. Telephone : TEM ple Bar OOS5. COURENT way of teULn# tke TIME

DAY AND NIGHT ELECTRIC SERVICE

W|t*° FOR QUICK RELIABLE REPAIRS AND REWINDS THE MIDLAND DYNAMO Co. Ltd. LEICESTER Phone 20172 (3 lines)

ROTARY QUICK MAKE & BREAK THE LARGEST BUYERS O F BRITISH MADE THROUGHOUT. HEATING ELEMENTS BUY FROM For all purposes — fully tested Switches to customers’ requirements. Let us use our long experience to solve your Switching problems. PEASHILL ROAD TOK SWITCHES LTD. CAMBRIDGE ROW, BURRAGE ROAD NOTTINGHAM WOOLWICH. S.E.I8 WHO SUPPLY ALL TYPES OF ELECTRIC SWITCHES ELEMENTS FOR MANUFACTURERS 76 E l e c t r ic a l R e v ie w October 11, 1946

®Ttotk Htrk '■ MEANS ACCURACY Cables • Flexibles • Wiring Accessories Bakelite Accessories « Irons Kettles • Toasters • Fires • Convectors Vacuum Cleaners • Fans • Lamps Fluorescent Fittings and Control Gear Public Address Equipment Wireless Accessories • Square and Round Hollow ware for ElectricCookers

TECHNICAL EXHIBITION The 50-range Model 7 Universal AvoMeter. KELVIN HALL, GLASGOW 15th The AvoMeter is one of a useful range of N ov.. (incf*) Visit o u r Stand N o. CC3 “ Avo ” electrical testing instruments' which are maintaining the “ Avo” reputation for an unexcelled standard of accuracy and dependability—in fact, a standard by which other instruments are judged.

39-43 ROBERTSON STREET, GLASGOW, C.2 Sole Proprietors and Manufacturers : II COLLEGE SQUARE NORTH, BELFAST AUTOMATIC COIL WlNDER & ELECTRICAL 66 CARTER LANE, LONDON, E.C.4 2-4 YOUNG STREET, ABERDEEN EQUIPMENT CO. LTD.,Winder House,Douglas BRYTERLITE ELECTRICAL SUPPLIES LTD. Street, London, S.W.I. Phone : Victoria 3404-9 59 DAME STREET, DUBLIN

Obtain maximum efficiency from your machine . . . Specialists in the design and manufacture of infinitely variable Control gear, for use w here any type of variable speed drive is required. Consult M TE to obtain m axim um efficiency from any type of multi-motored equipment. W rite for particulars of the M TE service . . .

OLIVER PEŁŁ CONTROL LTD

M3/8 October 11, 1946 E l e c t r ic a l R e v ie w (,Supplement) 77 I LABGEARI_____ ★ SHIELDED TEST PRODS ★

DEVELOPED IN CON1UNCTION WITH LEADING BRITISH ELECTRICITY SUPPLY UNDERTAKING

DESIGN ADVANTAGES INCLUDE ★ FULL PROTECTION AND SHIELDING FOR OPERATIVE. LONG LEAKAGE PATH. SHROUDED SELF - RETRACTING PROBE. REINFORCED CABLE AT ENTRY POINT. MACHINED FROM SOLID. HIGH-GRADE MATERIAL and W ORKMANSHIP THROUGHOUT for further details and list write to

We welcome your enquiries I or Telegrams to " L A B G E A R , ELECTRICAL EQUIPMENT LABGEAR C A M B R I D G E " or Telephone quantities, small or large CAMBRIDGE, ENGLAND CAMBRIDGE 2494 (2 lines)

.. over liv e kori;

In your wartime production you may have lost touch ELECTRODES with your pre-war sources of supply, and as you turn to IN ALL DIAMETERS peacetime production you will PLAIN AND SHAPED desire to link up with some competent, helpful supplier of CONTACTS sub-assem blies, welded com po­ X-RAY T A R G E T S nents, presswork and the like. SPARK GAPS The time to make arrange­ PLATES D IS C S ments, however, is now. W hy A N D RINGS not write to us and let us start helping you now ? ELECTRO-ALLOYS LTD

G lR PEX l°,?.'=ri 12 BRllNEt ROAD LONDON W.3.

GIRDEX ENGINEERING CO. LTD. TELEPHONE-. SHEPHERDS BUSH 3460 WESTON LANE. TYSELEY. BIRMINGHAM 11 Phone: Acocks Green 2205 Grams: GIRDEXPRES

® P.M.3 78 (Supplem ent) E l e c t r ic a l R e v ie w October 11, 1946 WELDING INDUSTRIES LIMITED COMMERCIAL ROAD BRISTOL. TEL. 23231

SPECIALISTS in W RITE FOR "HARCORAY ” BROCHURE ILLUSTRATING COMPLETE RANGE OF WELDED REFLECTORS FOR SHOP, STORE AND FABRICATIONS SHOWCASE LIGHTING. (Gas and Electric arc) for the 1 1 1 ELECTRICAL larcourls INDUSTRY STANHOPE HOUSE, KEAN STREET,

ALDWYCH, W.C. 2. Prototype or targe quantities T e le p h o n e : T E M P L E B A R 9671/2/3.

^LEONARD HEYS] CONTROL CHOKES (ESTABLISHED 1930 • W HOLESALE ONLY) FOR FLUORESCENT TUBES • WELDING BLOWPIPES AND REQUISITES NOW IN PRODUCTION • ELECTRICAL WOODWORK ENQUIRIES INVITED • DOMESTIC ELECTRICAL APPLIANCES • NON-CMA CABLE, WIRE AND FLEXIBLES SIMMONDS BROS. Prompt and Personal Service BEDCOTE MILL, STOURBRIDGE Contractors invited to write for lists to Telephone : STOURBRIDGE 57730 L O N D O N : R. B . W hittiek, A.M.I.E.E. \JaradayHouse, Henry St., BLACKPOOL^ Abford House, W ilton Road, S.W.I. Telephone: VICTORIA 6957-8

BITUMEN COMPOUND KETTLE JOINTER’S BUCKET BUCKET REST WITH FALSE BOTTOM TYERS JOINTERS MELTING EQUIPMENT FURNACE Portable Oil Furnace, Melting Pot, Bucket Rest, Bitumen Bucket, Com pound Kettle and Metal Ladle. The PORTABLE FURNACE & PATENTS CO. CARRINGTON, NOTTINGHAM Telephone: NOTTINGHAM 64887 BUCKET FALSE BOTTOM ADJUSTABLE COVER Members of : OIL BURNING APPARATUS ASSOCIATION ty October 11, 1946 E l e c t r ic a l R e v ie w (Supplément) 79

ed inf S t e e l w o r k 0# Amongst a host of things we M| make for the electrical industry is H M this case and lid for a kitchen unit. W e are specialists in this type of work, and invite enquiries about your own problems. W h y 30i$ not get in touch with us for a ICE} consultation ? IE K For Steelwork You Want ROBERTS t Co ! (WEDN ESBURYI LIMITED msi, FRANCHISE STREET, WEDNESBURY, STAFFS. Telephone: Darlaston 488 & 489 Telegrams: "Roberts 488 Darlaston ” «ni

ELECTRIC TRA|j ORMER C? LTD PHO NE, DEW S.1691-2 m DEWSBURY 8 0 (Supplement) E l e c t r ic a l R e v ie w October 1 1 ,1 9 4 6

^ T n e L / m / t s / a / =!'/ A I Î T A L '■J'JÙilii y FOR INSTRUMENT CASES \A /E can satisfy your requirements in ELECTRICAL SWITCHGEAR CASES Sheet Metal Precision work, for we work to the finest limits. AMPLIFIER RACKS, etc. And by fine limits, we mean what we say. RADIO CHASSIS You can therefore send us your enquiries with confidence that we can fulfil your need.

W e are also equipped to finish an excellent job by enamelling, electro-plating, etc., to your specification.

RITHERDON s C o m p a n y Limited North Bridge Mill, White Lion Brow, Deansgate, Bolton Established I89S Telephone : 3722

PRESSED STEELl STROBOSCOPES SCREWED FITTINGS

High speed m oving parts can Flexible M etallic be viewed as if stationary T u b in g CONDUIT with the DAW E STROBO­ FITTINGS SCOPE and can be photo­ graphed with the aid of the FITTER cPOULTON ltd DAW E PHOTOFLASH VINCENT PARADE Write now for full details of these BALSALL HEATH essential equipments Ref. G B .IB O BIRMINGHAM 13

OTHER INSTRUMENTS H j i Sound and Vibration Meters and YOU CAN RELY UPON «5% Analysers. Moisture Meters Test Gear for Mass-Production Testing ' Precision Resistors and Condensers A.C. Bridges and Oscillators Motor Repair Service Instruments for Measuring Frequency and Wave-form URGENT REW INDS Valve Voltmeters and Power Meters COMPLETED AT SHORT NOTICE a4Cui; For complete details write : EVERY ¡OB GUARANTEED DAWE INSTRUMENTS LTD. R e p a i r e r s to Admiralty, Air Ministry, Ministry of Supply, W ar Department, L.C.C., B.B.C., etc. Write i Harlequin Ave., Great West Rd. Brentford, Middlesex WM, STEWARD & CO LTD. 154 A L B A N Y ST., L O N D O N , N . W . I Telephone : Ealing 1850 ______Telephone: EUS. 3763 1 October 11, 1946 E l e c t r ic a l R ev ie w (Supplement) 81

A C O M P L E T E Electrical Distribution Unit All in One . . . Handy and Compact . . .

W here electrical installations are concerned, in any kind of building, you can’t afford to overlook the C EM D U , Here is the complete distribution system — CEMDU fuses, switch and m eter— arranged all together in a sm artly finished durable, sheet metal case, ready for Carlisle Electrical Mains Distribution Unit installing. N o loose, trailing wires or hard-to-reach components. The C EM D U brings everything within immediate sight and reach. Moreover, expansion is so much easier with the C EM D U . It is available in a number of arrangements in order to meet any particular requirement.

Write for full details to the Sole Makers

ELECTRICAL PARNIĘ MFG. CO. LTD.

BEN TC LIFFE W O R K S , EC C LES, Lancs Phone: Eccles 169112/3/4. Grams: “ Carlectric,” Eccles ROSS “The Bridle for Air Horsepower” A I R VALVES

Operated by Foot, Hand, or Solenoid for the control of Air-actuated Machinery.

In many installations Ross Air Valves, Solenoid Operated,, offer worth-while economies.

Mounted immediately adjacent to the cylin­

ders they operate, excessive piping (which is-costly to fill with 4-way Ross A ir Valve,

air that does no work) is eliminated. All pipe connections, Solenoid Operated. including conduit for wiring to Solenoid, are made through the base of the unit.

Ensure quick, delicate and precise control of air cylinders on all air-actuated equipment. Poppet type. Pressure sealed.

Write for illustrated booklet to

THE WELLMAN SMITH OWEN ENGINEERING CORPORATION LTD VICTORIA STATION HOUSE. LONDON. S.W 1 W ORKS DARLASTON. SOUTH ST AFFS 8 2 (Supplement) E l e c t r ic a l R e v ie w October 11, 1946

Index to Advertisers page Arcolectric (Switches) Ltd ...... 84 Aron Electricity Meters Ltd ...... 34 WORTHINGTON - SIMPSON Association of Electrical Machinery Traders Ltd.. . 50 Astor Boisselier & Lawrence Ltd ...... 32 Automatic Coil Winder & Elecl. Equipment Co. Ltd. 76 Bakelite Ltd ...... 24 & 87 Barlow-Whitney Ltd ...... 96 Berry’s Electric Ltd...... 54 Condensing Plants for Main Power Birmingham Mica Co. Ltd...... 92 Stations.-Surface Condensers-Latest Bowthorpe Electric Co. Ltd ...... 102 Britannia Batteries Ltd...... 30 Double Folded Tube Layer Design, British Insulated Callender’s Cables Ltd ...... 9 British Klockner Switchgear Ltd ...... 104 giving Oxygen Free Condensate at British Precision Springs Ltd ...... 74 Vacuum Temperature. British Ropes Ltd...... 2 British Thomson-Houston Co. Ltd...... 5 & 43 Circulating and Extraction Pumps. Brook Motors Ltd...... 3 B row nin g’s E lectric C o. L td Cover iii Bryterlite Electrical Co. (Glasgow) Ltd ...... 76 Steam Jet A ir Ejectors. Bull Motors...... 52 Bullers Ltd ...... 57 Closed Feed Systems. Cable Makers’ Association ...... Cover ii Cambridge Instrument Co. Ltd...... 54 Heaters. — Evaporators. Canning, W., & Co. Ltd ...... 89 Carlisle Electrical Mfg. Co. Ltd...... 81 Automatic High Pressure C ity E lectrical C o ...... 84 Bye-paSS Valves (Patent applied for). City & Provincial Stores Ltd ...... 98 Clarke, Chapman & Co. Ltd ...... 103 C larke, H ., & Co. (Manchester) Ltd...... 100 De - aerators. Collins Electrical Co ...... 24 Connollys (Blackley) Ltd ...... 45 Boiler Feed Pumps. Cressall Manufacturing Co. Ltd ...... 30 Crompton Parkinson Ltd 35, 44 & 93 Automatic Exhaust Relief Valves. Cryselco Ltd ...... 8 Daly (Condensers) Ltd ...... 50 A COMPLETE SERVICE. Darwins Ltd ...... 22 D avis & T im m ins L td ...... 104 Dawe Instruments Ltd ...... 80 WORTHINGTON - SIMPSON LTD. Desoutter Bros. Ltd...... 15 Donovan Electrical Co. Ltd ...... 102 NEWARK-ON-TRENT. D .P . B attery C o. L td ...... 22 DS Plugs Ltd ...... 97 Dubilier Condenser Co. (1925) Ltd ...... 90 D u ratube & W ire L td ...... 100 Electric Construction Co. Ltd ...... 38 Electro-Alloys Ltd ...... 77 Electroway Heaters...... 74 English Numbering Machines Ltd ...... 98 Enthoven, H. J., & Sons Ltd...... 73 COIL Evans, Adlard & C o. L td ...... 92 Evershed & Vignoles Ltd ...... 88 Ferguson, Pailin Ltd...... 37 Ferranti Ltd ...... Cover i & 11 Fitter & P ou lton L td ...... 80 WINDING Fluxite Ltd...... 28 F ry’s M etal Foun dries L td ...... 4 General Electric Co. Ltd ...... Cover iv, 47 & 58 I.O.G. INDUSTRIES LTD. Gent & Co. Ltd...... 31 Girdex Engineering Co. Ltd ...... 77 476 HIGH ROAD G relco L td ...... 96 LEYTONSTONE G rey, John A ., & Partners L td ...... 16 LONDON, E.ll Hampton Works (Stampings) Ltd...... 24 Telephone No. : Leytonstone 3877 Harcourts Ltd ...... 78 Hart Accumulator Co. Ltd ...... 32 Heatrae Ltd ...... 1 Heayberd, F. C., & Co. Ltd ...... 104 H ed in L td ...... 96 Henley’s, W. T., Telegraph Works Co. Ltd ...... 13 Hewittic Electric Co. Ltd ...... 8 6 Heys, Leonard ...... 78 CONTROL GEAR H ildick & H ild ic k ...... 42 Hoffmann Manufacturing Co. Ltd ...... 101 INDUSTRIAL, MARINE Holophane Ltd ...... 33 AND FLAMEPROOF Hopkinson Motors & Electric Co. Ltd ...... 8 6 'R I Igranic Electric Co. Ltd ...... 53 Imperial Chemical Industries Ltd...... 49 & 103 RESISTANCES, REGULATORS I.O.G. Industries Ltd...... 82 Iso-Speedic Co. Ltd ...... 56 D.C. & A.C. M O TO R STARTERS Jackson Electric Stove Co. Ltd ...... 23 Johnson & Phillips Ltd ...... 18 Special Control Apparatus Jones, Samuel, & Co. Ltd ...... 28 Designed and Manufactured Kango Electric Hammers Ltd...... 97 Kirolite (Sales) Ltd ...... 46 SOLENOID REGULATOR CO. L a b g e a r ...... 77 L egg (Industries) L td ...... 94 268 MOSELEY ROAD, BIRMINGHAM 12 (Continued on page 84) October II, 1946 E l e c t r ic a l R e v ie w (Supplement) 83

Borehole Pumps including For Submersible Pumps all depths and For Public, Industrial and Domestic Water Supply working conditions Pulsometer engineering C L d., tlin c e i m s Ironw orks. Read!n 9 — ZfffiH— ( r e g d . t r a d e - m a r k ) VARIAC TRANSFORMERS (British Patent No. 439567)

PROVIDE THE MOST ECONOMIC METHOD FOR ACCURATE A.C. VOLTAGE AND CURRENT CONTROL

A COMPREHENSIVE RANGE OF ENTIRELY BRITISH MADE VARIAC TRANSFORMERS IS N O W A V A I L A B L E

Please allow us to send you a copy of our descriptive catalogue

THE ZENITH ELECTRIC CO. LTD. Zenith Works, Villiers Road Willesden Green, London, N.W.2

Phone: WILIesden 4087-8-9 Gram s: “ Voltaohm, Phone, London ” 8 4 CSupplement) E l e c t r ic a l R e v ie w October 11, 1946

Index to Advertisers (Continued from page 82) p a g e Litholite Insulators & St. Albans Mouldings Ltd 73 “MORECAMBE” Liverpool Electric Cable Co. Ltd...... 91 L on dex L td ...... 104 London Electric Firm ...... 94 Lyons, Claude. Ltd ...... 16 Macfarlane Engineering Co. Ltd ...... 46 Machine Tool Electrics Ltd ...... 76 Macintyre, James, & Co. Ltd ...... 30 Martindale Electric Co. Ltd ...... 55 Matterson Ltd ...... 90 McGregor, Robert, & Co ...... 90 M. & C. Switchgear Ltd ...... 19 M.C.L. & Repetition Ltd ...... 1 Mek-Elek Engineering Ltd ...... 26 Metallic Seamless Tube Co. Ltd ...... 32 Metropolitan-Vickers Electrical Co. Ltd...... 95 Midland Dynamo Co. Ltd ...... 75 Midland Electric Mfg. Co. Ltd ...... 29 Miller-Hepworth Ltd...... 42 Mirrlees Watson Co. Ltd ...... 92 Moffats Ltd ...... 10 Mole, M., & Son Ltd ...... 101 Morecambe Electrical Equipment Co. Ltd ...... 84 National Register of Elecl. Installation Contractors.. 98 Neill, James, & Co. (Sheffield) Ltd...... 83 Newman Industries Ltd ...... 48 Modern Stator Rotor Starters for Normand Electrical Co. Ltd ...... 36 Northern Aluminium Co. Ltd ...... 41 Slipring Motors Oliver Pell Control Ltd ...... 76 Parmiter, Hope & Sugden Ltd ...... 85 One Handwheel Interlocked Control Partridge Wilson, E., & Co. Ltd ...... 102 Perkins, F., Ltd ...... 14 Robust design - Competitive prices Permutit Co. Ltd ...... 99 Phosphor Bronze Co. Ltd ...... 74 Reasonably good deliveries Pinchin, Johnson & Co. Ltd ...... 20 Portable Furnace & Patents Co ...... 78 Premier Electric Heaters Ltd ...... 27 MORECAMBE ELECTRICAL EQUIPMENT GO. LTD. Pulsometer Engineering Co. Ltd ...... 83 WESTGATE WORKS, MORECAMBE Pultra L td ...... 20 Rejafix Ltd ...... 100 Telephone 1414 & 1415. T e le gra m s: “ M E E C O ” Reyrolle, A., & Co. Ltd ...... 25 Ritherdon & Co. Ltd ...... 80 Roberts & Co. (Wednesbury) Ltd ...... 79 R o ss C ourtney & C o. L td ...... 1 A small Toggle Switch should have R ow lan d s Electrical A ccessories L t d ...... 17 Rubber Bonders Ltd ...... 28 a means of breaking the circuit Runbaken Electrical Products...... 102 Salter, George, & Co. Ltd ...... 92 mechanically independent of the Saxon Components Ltd ...... 74 Service Electric Co. Ltd Cover iii spring. Siemens Electric Lamps & Supplies Ltd ...... 21 Simmonds Bros...... 78 Solenoid Regulator Co ...... 82 THE ARCOLECTRIC S.350 SWITCH Standard Telephones & Cables Ltd ...... 51 Static Condenser Co. Ltd ...... 46 COMPLIES WITH THIS REQUIREMENT Stephens Belting Co. Ltd ...... 90 Sternaw Co. Ltd ...... 100 Write for Catalogue Steward, Wm., & Co. Ltd ...... 80 Stream-Line Filters Ltd ...... 94 Sturtevant Engineering Co. Ltd ...... 7 ARCOLECTRIC (SWITCHES) LTD. Telegraph Condenser Co. Ltd ...... 34 EDWIN ROAD, TWICKENHAM Telephone Mfg. Co. Ltd ...... 26 Thew, Edward H., Ltd ...... 104 Thorpe, F. W., Ltd ...... 12 T.M.C.-Harwell (Sales) Ltd ...... 75 Tok Switches Ltd...... 75 Tucker, J. H., & Co. Ltd ...... 40 Tullis Russell & Co. Ltd ...... 6 Universal Boilers & Engineering Co. Ltd ...... 86 Vactric Ltd ...... 42 Varley Magnet Co ...... 73 Veritys Ltd ...... 55 W ard & G o ld sto n e L td...... 45 Wardle Engineering Co. Ltd Cover iii Weekes, L., (Luton) Ltd ...... 96 Weir, G. & J., Ltd ...... 94 Welding Industries Ltd ...... 78 Wellman Smith Owen Engineering Corporation Ltd. 81 Westminster Engineering Co. Ltd ...... 1 Wireohms Ltd ...... 75 W o lf, S., & C o. L id ...... 39 Woods of Colchester Ltd ...... 42 Worthington-Simpson Ltd ...... 82 Yarrow & Co. Ltd ...... 41 Yorkshire Electric Transformer Co. Ltd...... 79 Zenith Electric Co, Ltd ...... 83 EM ERALD STREET. LO ND O N , W . C. 1. TE L EP H O N E HOLBORN 9722. October 11, 1946 E l e c t r i c a l R e v i e w (Supplement) 85

ECAHS

•IK

it nit I of' PE'S PATENTSI

»INSULATED HOUSE SERVICE CUT-OUTS I« f _ I H IS range of insulated service fuse units is suitable muj for domestic and small power consumers. The units ' embody Aeroflex high breaking capacity, rewirable mi cartridge fuses, which are adequate for all categories of duty, and afford at the same time the advantage of cheap and easy rewirability. The units are supplied to suit single-phase or three- phase underground or overhead services up to 100-amps, continuous rating. For larger services, including large power consumers, Aeroflex service units are provided in ironclad enclosures.

PARMITER, HOPE & SUGDEN LTD. Longsight, Manchester 12. London : 34 Victoria St., S.W.I 86 (Supplement) E l e c t r ic a l R e v ie w October 11, 1V46

Converting /I.C.toV.C.

u h X /l ¡fenéÁoi-CoucA- ¿/ió& utć-/ie£eoM WRINGER íiNIVERSAl ßüitetä & Snqoteeiichq Com Ç u tfed çe ¿O crikô. ■ ßcdA Svßai/ Telephones : 3 /2 / - 3/22 • 3 2 0 3

HOPKINSON MOTORS & ELECTRIC CO LTD

“pHE demand for HEW ITTIC g la s s STANDARD RANGE: bulb RECTIFIERS, simplest, most Three-phase Induction Motors reliable of all converting plant, J to 3 0 hp has constantly increased. They are 0 3 to-day, as they have always been, Répulsion-Induction Motors the most m odern choice in rectifier J to 5 hp equipment— for every application, HEAD OFFICE: small or large, from battery charging Grangeway • Kilbum • London N W6 up to the operation of D.C. Telephone : Maida Vale 9306-8 industrial plant and traction systems. Cables : Origimotor London

HEWITTIC ELECTRIC CO. LTD. WALTON-ON-THAMES, SURREY

Telephone : WALTON-ON-THAMES 7 6 0 '(8 lines)

Telegrams : HEWITTIC, WALTON-ON-THAMES October 1 1 , 1946 E l e c t r ic a l R e v ie w (Supplement) 87

k

Test Set produced by Everett, Edgcumbe & Co. Ltd. Case built up from Bakelite Laminated and manu factured by H. Comoy & Co. Ltd.

-solved by using BAKELITE LAMINATED

The obvious material for the job . . . light, yet strong and rigid . . . easily machined yet able to withstand hard, daily service . . . a good electrical insulator. Such a case, made

from B a k e l i t e Laminated, has good appearance, resists heat, acid, oils, most chemicals and protects its contents from fungoid growths, termites and other pests.

TREFOIL BAKELITE

Pioneers in the Plastics W orld

B A K E L I T E LIMITED 18 GROSVENOR GARDENS - LONDON, S .W .I

E 88 (Supplement) E l e c t r ic a l R e v ie w October 11, 1946

JAm-.S

m oving

foi/e6 on: nor a\

waii

KJm ar -S\huijijam.

EVERSHED & VICNOLES LTD CHISWICK LONDON W 4

W hen writing please mention D 5 68 uetober 11, 1946 E l e c t r ic a l R ev ie w (Supplement) 89

For reclaiming and building up Engineering products. Cams, crankpins, crankshafts, gears, bearings, piston rods, cylinders for internal combustion engines, gauges, dies, moulds, etc. Let us help you with your reclamation problems.

CREAT HAMPTON STREET. BIRMINGHAM 18 90 (Supplem ent) E l e c t r ic a l R e v ie w October 11,1946

Modern Lighting H U BILIED calls for

To take full advantage of the high efficiency of F lu o re s c e n t and Gas- e o u s-d isc h a rg e lighting it is necessary to correct the pow er factor of these lamps. D U B I L I E R N I T R O G O L C A PA C ITO RS are the most effective, reliable and convenient method of ensuring this correction. The N IT R O G O L process means small, light and dependable Capacitors easily placed in position in all standard fittings. C om plete suppressor units are also available in a wide and com prehensive range. Full technical details on request. DUBILIER CONDENSER CO. (1925) LTD., DUCON WORKS, VICTORIA ROAD, NORTH ACTON, LONDON, W.3. Telephones: A c o rn 2241 (5 lines). Telegram s: Hivoltcon, Phone, London. Cables: Hivoltcon, London. Marconi International Code.

‘Phono: Moleoey 5 5 6 . V-DRIVES PROMPT DELIVERY MILD STEEL OF ALL SIZES OF V-BELTS AND CABLE HANGERS AND RACKS. PULLEYS STEPHENS ROBERT McGREGOR & Co., ALPINE STEEL WORKS, B E L T IN G C o . L t d . EAST MOLESEY. SURREY. V-DEPT., SNOW HILL, BIRMINGHAM, 4

ELECTRIC PULLEY BLOCK H Matterson Hoists are compact and efficient, require but little attention to keep them in 0 good condition, and are made throughout by men taking a pride in their job. They will not let you down. 1 S MATTERSON LIMITED Shawclough. Tel. 4194 R o ch d a le T

Two-speed Hoists with instantly obtainable creeping speed are available S H October 11, 1946 E l e c t r ic a l R e v ie w (Supplement) 91

Red*,

ÏÏBil i m u sa t« raa« , ! '«•! m a «

DUCM* .WCM ai om nndGi

(LOCK

¡SM RUBBER, CAMBRIC & PAPER them is boot by INSULATED CABLES Members of the MADE TO ALL STANDARD SPECIFICATIONS ( Cable M a kers’ Association T H E LIVERPOOL ELECTRIC CABLE COMPANY LIMITED BO O TLE — ------LIVERPOOL 20 92 (Supplement) E l e c t r ic a l R e v ie w October 11,1946

MODERN POWER STATION EQUIPMENT

SURFACE AN D JET CONDENSING PLANT

EVAPORATORS AND

DE-AERATORS STEAM EJECTOR AIR PUMPS CONDENSATE EXTRACTION

AND CIRCULATING W ATER PUMPS HIGH PRESSURE FEED WATER HEATERS

MRRLEES WATSON HWIIUHMIUIIIHigTs^^ c O M p A - M V I I M I T E » ^ »»iáillUIIIIIUUIimWH

ENGINEERS GLASGOW

Natural in all Grades and Qualities, Stove Micas, Plates, Washers, Commutator Seg­ MIGA ments, Condenser Films, etc. Moulding,Commutator, Flex­ ible, Heat-resisting Qualities, Commutator Rings, Spools, MIGANITE Tubes, etc. Mouldings of any shape or form, Tubes, Plates, Washers, Sheets in all thicknesses, BAKELITE etc. SEND TO THE MANUFACTURERS The BIRMINGHAM MICA Co. Ltd. South Road, Hockley, Birmingham Telegrams: “ Insolation, Phone, Birmingham.” Phone: Northern 0118.

A'VVXW'vvvvWWWWXWW'VVVWWW'VWWWVWWWWWWWWWW' S A L T E R SPRINGS G E O . SALTER & C O . LTD., W EST BROMWICH wvvwwwvwm wm vwwwwwuwwwW I October II, 1946 Electrical Review (Supplement) 93

YOU CAN REST SECURE

WITH ( r o m p t o n WoOoDGo CABLE

W. CROMPTON PARKINSON LIMITED, ELECTRA HOUSE, VICTORIA EMBANKMENT, LONDON, W.C.2 ! Telephone: TEMple Bar 5911 Telegrams: Crompark, Estrand, London 94 (Supplement) E l e c t r ic a l R e v ie w October 11', 1946

C o m P a ° ie S ’ ^ <, l a r g e s t j j , best too«®■ *; ctridty ^arge an and users of elect ^ ^ ^

throughout ?iber t0 . t r a n s - Strea»-L due of the oil ^ over insulating itch gea fullv

plants from 5 Sa per hour. - —

C P O t n ^ f /tf fadirfacfiAAeM of BATTERY CHARGERS RECTIFYING EQUIPMENT TRANSFORMERS

I INDUJTRIEJI LTD.

: laN yo4 Euejiuc F®n T«Iepbon^UPLAiro^87^C9>m«i. — f f WILLIAMTON JT. K |/k RATCHETS^PAWLS, SPRINGS I WOLVERHAMPTON Slo V i • N W WORM OR GEAR WHEELS rl

Conversion to Oil Fuel— specify Weir Oil Fuel Pumps

Write for Oil Pump Catalogue GI9. tlAl/EirO LT D |CATHC ART : CLASCOW October 11, 1946 E l e c t r i c a l R e v ie w (Supplement) 95

E/A60I ETRO VICK_____—- 96 (Supplem ent) E l e c t r i c a l R e v ie w October 11, 1946

ELECTRICALLY HEATED FURNACES

Batch and Continu­ ous type Furnaces for all purposes. Temperatures t o 1,000/1,100° C.

Oilier B-W Products

OVENS. Alltypes IMPR EGNATORS METAL POTS GLUE & W A X KETTLES IMMERSION HEATERS SOLDERING WEEKES IRONS. Etc. Ask for[List FjER

THE OLDEST FIRM I BARLOW-WHITN EY LTD

Manufacturing Cartridge Fuses ; but we have— Greko THE LATEST IDEAS MULTI-PLUG ADAPTORS

ELEVEN TYPES Send your specification to R eg. D esign Fully illustrated descrip tive folder on application L. WEEKES (LUTON) LTD GRELCO Ltd., Grelco Works, Hopcott, Minehead, Somei LUTON, BEDS.

Telephone : Luton 278

WE CAN MEET IT >* MM KNIGHTON LANE. BUCKHURST HILL. ESSEX. ELECTRIC HEATING APPLIANCES “ THERMONETS” for INDUSTRIAL HEATING October 11, 1946 E l e c t r i c a l R e v ie w (Supplement) 97

Write for Literature an electric clock to a 3-kW load.

Announcement of D S Plugs Ltd., Ordsal Electrical Works, Manchester, 5. ER 1046

KnncaS' TYPE ELECTRIC HAMMER The licjhter Ltammer fü r the Li (¡titer fo t

The new ‘S ’ Type Kango Electric H am m er has been introduced to fill an essential need fora light yet powerful ham m er designed to stand up to hard and continuous wear. The most important feature is that because of its light weight it can be used for all ceiling w o rk where the larger and heavier ham m ers may be too cumbersome for the w orkm an to operate. For the electrician and maintenance engineer this hammer is particularly useful for all Rawlplug arid similar w ork, its speed in drilling is phenomenal having regard to its light weight. The ham m er can also be used for light cutting away, hacking, brick raking and boiler scaling, etc.

I KAflGO flee trie Hammers l t d . MORDEN FACTORY ESTATE, LOMBARD ROAD. LONDON, S.W.I». Agents throughout the United Kingdom 98 (Supplement) E l e c t r i c a l R e v ie w October 11, 1946

C^lie value o f Q o n fle t i c e

Confidence is achieved when a high standard is maintained and its value will never be under-rated by the genuine business man or master craftsman. THE NATIONAL REGISTER OF ELECTRICAL INSTALLATION CONTRACTORS, established over 21 years ago, aims at maintaining a high standard of qualification and raising the efficiency and status of Electrical Installation Contractors, thereby safeguarding the public against inferior materials and workmanship. THE NATIONAL REGISTER OF ELECTRICAL INSTALLATION CONTRACTORS is an independent body directed by representatives of important Associations con­ nected with the Electricity Supply Industry, including The Institution of Electrical Engineers ; The Association of Consulting Engineers ; The Central Electricity Board ; The Incorporated .Municipal Electrical Association; The Electrical Contractors’ Association of Scotland. Electrical Installation Contractors holding the Certificate of the National Register have given evidence of competency ; their work is subject to periodical inspection ; they under­ take to pay rates of wages and observe conditions of employment not less favourable than those of the appropriate trade agreement ; and observe The Regulations for the Electrical Equipm ent of Buildings issued by the Institution of Electrical Engineers. Ï0I NATIMIU ItElilSTEIt of ELECTIIIME INSTALLATION CONTRACTORS - For full particulars apply to Secretary, 13 Victoria Street, London, S.T ^.i

r Iill FOR ALL TYPES OF BOXES, CASES, Commercial and Industrial CONTAINERS, p i INDUSTRIAL AND — WOODWORK SCHOLASTIC lit contact FURNITURE, CABLE DRUMS, City and Provincial Slores, Lid. INSTRUMENT CASES, Queen's Road, Ashton-under-Lyne, Lancashire CABINETS, Phone: Ashton 1941 ETC. SPECIALISTS IN QUANTITY PRODUCTION

¿bwtîers that ready (puntn/ith the (od winding industry.

The exacting demands of coil winding has led to the production of E.N.M. precision counters. They are designed to give accurate recordings and unfailing service at high speeds over very long periods. There is an E.N.M. counter for every purpose where reliable checking is needed. Full details supplied on knowing your requirements. ENGLISH NUMBERING MACHINES, LTD., 38 BARRETTS GROVE, LONDON, N.16 October 11,1946 E l e c t r i c a l R e v ie w (Supplement) 99 Do you need "distilled" water?

Permutit “ Deminrolit" Process cuts cost as much as 95%

ANALYSES OF WATER BEFORE AND AFTER TREATMENT BY PERMUTIT 'DEMINROLIT' PLANTS IN COMMERCIAL USE. sa (Hote-All figuras ln .parts por 100,000. )

Plant No 1 No . 2 No . 3 TOE Water Crude Treated Crude Treated Crude Treated

Cations ME Calcium Ca 3.2 9.4 10.7 Magnesium Mg 0.8 - 0.36 - 1.09 - Sodium Na 0.46 0.23 1.0 0.31 1.66 0.44

Total 4.46 0.23 10.76 0.31 13.45 0.44

Anions

Carbonate C03 4.2 0.24 12.4 0.29 10.5 0.57 Chloride Cl 1.8 0.06 2.5 0.12 2.84 0 3 0 f f i , Sulphate SO* 1.35 - 3.48 0.03 11.95 - Nitrate NOa -- -- 1.15 - Total 7.35 0.30 18.38 0.44 26.44 0.87

Total ions in solution 11.81 0.53 29.14 0.75 39.89 1.31

COST per 1000 gallons 5. 22d 9 83d 16. 5d

The table shows the composition of some types of water before and after treatment by Permutit’s “ Deminrolit” Process. Water similar to a distillate is produced by this process at a fraction of the cost. Where distilled water was too expensive you can afford “ Deminrolit ” water. The process has been in practical use in Great Britain for over 7 years. Write for technical publication “ Distilled Water without Distillation” to PERMUTIT Company Limited Dept T.W., Gunnersbury Avenue, London, W.4. Chiswick 6431. 100 (Supplem ent) E l e c t r i c a l R e v ie w October 11,1946

MICA e-MICANITE Send us your enquiries for all classes of MICA AND MICANITE. We can give you the quality and service required. Ask for booklet M/44. Contractors to Admiralty, Air Ministry, War Office and other Government Department lists. H. C1ARKE S({.(MaiHhester) Ltd. Atlas Works, Patricroft, Manchester

Telephone : Eccles 2001-2-3-4-5 Telegrams : “ Pirtoid, Phone, Manchester”

CLEAN, PERMANENT MARKING ü s s ü ü ® ON A \ ^ j f BAKELITE, METAL, GLASS, WOOD IPiTftOL PRDO* COMPONENT PARTS, Etc. K O N - NO#- iPrtAMMABLE A ßgm e

DURATUBE & WIRE LTD., FELTHAM. MIDDLESEX

LARGE OR SMALL ARTICLES OF ANY SHAPE PRINTED BY ONE SIMPLE MACHINE Adopted in place of engraving by many leading manufacturers

REJAFIX LTD. " lSESJST 425 Upper Richmond Rd., East Sheen, London,S.W.14 Tel. i Welbeck 1979 & 5HI Telephone: Prospect 7287/8 October 11, 1946 E l e c t r ic a l R e v ie w (Supplement) 101

Y O U R steam raising plant is doubt­ less efficient, but what about the steam using side ? If /our generators and all rotary machines are on HOFFMANN

R O LLER BEARINGS

and if they have been thus fitted with the assistance of the HOFFM ANN TEC H N IC A L SERVICE, you may be sure of the most economical running. But should you think there may yet be a “ waste o u tle t” get in touch with us. W e will gladly help to 'A preserve that coal pile!

THE HOFFMANN MANUFACTURING CO. LTD., CHELMSFORD. ESSEX

The For Safer, Surer r i ID Farthing: . . ™ ADVANTAGES : » 1 Larger contact surface than any other Earthing W l t l l CL Clip. Suitable for all sizes of conduit. e £ A permanent safeguard against accidents. Coils of W 9 ■ W k ▼ wire under tension, therefore a perfect earth. 10/6 per doz. Subject to Trade Discount.

O b t a in a b l e F r o m A l l L e a d in g E l e c t r ic a l W h o l e s a l e r s

AS SUPPLIED TOTHEG.P.O. EARTHING CLIP Write fo r Sam ples to— M. MOLE & S O N LTD.^51-56 JSHARLOTTE ST., BIRMINGHAM 3 102 (Supplement) E l e c t r i c a l R e v ie w October 11,1946

TïlMÂSTOÎlMtM

* for every need.

When a transformer is required; whatever the specification, a D A V E N S E T ’ product will always m eet the most exacting need. W e specialise in designing and building to customers' particular requirements, air or oil-cooled Transformers to operate under all conditions and incorporating the same care in manufacture that has made all ' DAVENSET' products world famous for Efficiency and Reliability Your enquiries will be welcomed

£ Marfriôg« XOitsoi) & Co. £t MANUFACTURING ELECTRICAL ENGINEERS DAVENSET ELECTRICAL WORKS • LEICESTER. MAKERS OF "DAVENSET" RECTIFIERS, SWITCHBOARDS AND BATTERY CHARGING EQUIPMENT ETC.

EARTHING CLIPS WITH SPECIAL BITE AND CRIP INTO TUBE OR ARMOURING Note the tongue which ensures perfect and permanent contact. Easy to fix. N u ts cannot turn. All size9 from half to two inches. PILOT THE LAMP DONOVAN ELECTRICAL CO. gives visual indi­ BIRMINGHAM 9. LTD. cation that r e q u i r e Test Voltaf being gener TOOL

J k t This high-speed Hand Grinder speeds up pro­ duction, and makes a ... robustly constructed better job. Many tool to give trouble-free service. Generating room and production 500v.wlth scale reading 0-50 megohms plus uses. Supersedes hand an A .C . and D .C . V o lt m e te r read ing 0‘500v. t o o l s . List B.5I will give you complete details. Send for interesting Machine shop in y0uR han0 feaflet " Q 2 ” BOWTHORPE ELECTRIC CO. LTD. IBAKEN - MANCHESTE R - I Goodtric Works, Oxlord. Tel. : O x fo rd 3 184-5-6 11, 1946 October E l e c t r ic a l R e v ie w (Supplem ent) 103 CLARKE, CHAPMAN

BOILERS

‘ K U M A N A L’ a copper base alloy produced by the Metals Division of Imperial Chemical Industries Ltd. for resistance purposes, meets British Standards Specification 115, Classes C and B. It can be used safely at Arrangement of one of two temperatures up to 350° C. and Clarke, Chapman Tri-drum possesses exceptional resistance to Watertube Boilers. corrosion. A copy of this booklet which Evaporation - 120,000 lbs. hr. gives details of the properties of Working Pressure 300 lbs. sq. in ‘Kumanal’ will be sent on request. Heating Surface - 12,000 sq. ft.

IMPERIAL CHEMICAL CLARKE, CHAPMAN & CO. LTD. INDUSTRIES LIMITED VICTORIA WORKS, GATESHEAD 8, Co. DURHAM TEL. » 72271 (6 LINES) - GRAMS: 'CYCLOPS* GATESHEAD LONDON, S.W .I London Office : 112/113 Fenchurch Street, London, E.C.3 Tel. : Royal 2737/8. Tel. Address : *Cyclops/ Fen, London 104 (Supplement) E l e c t r i c a l R e v ie w October 11,1 W b

SCREWS • TERMINALS • PRESSWORK

$ it s U ifu ixïxkd

m m äh, it /

oaTi’M O«*' «v»'1*0

TURNED PARTS & INSERTS

ENGRAVED BRASS, CAST BRASS AND ALUMINIUM, ENAMELLED BRONZE AN D CHEMICALLY ENGRAVED PLATES OF ALL TYPES IN ALL LANGUAGES MANU­ FACTURED BY THE EMPIRE’S LARGEST GENERAL ENGRAVERS. SAMPLES AND QUOTATIONS ON REQUEST. F. (. HEAYBERD 4 CO. LTD EDWARD H. THEW LIMITED 11 Dean Street N e w c astle-on lYnP

SNAP-ACTION LIMIT SWITCH TY PE A K F R

OTHER PRODUCTS : AUTOMATIC STARTERS ROTARY SWITCHES CONTACTORS Ask for Leaflet 111/0 OVERLOADS British Klockner Switchgsar Ltd. L 0 N D E X • LTD MANUFACTURERS OF RELAYS Chertsey, Surrey. Phone: CherUey 2221/2 Aa EoRBlKEsY 207 ANERLEY ROAD-L0ND0N S E-20 syo.KST« n. October 11, 1946 E l e c t r i c a l R e v ie w in

MANUFACTURERS of “ BROW LECO ” Electric Soldering Irons (6 0 -5 0 0 W ) COMMUTATORS M A G N E T IC SPECIAL and SLIPRINCS SEPARATORS SWITCHGEAR BROW NING’S ELECTRIC CO. LTD. Boleyn Castle, Green Street, Upton Park, London, E.I3 Telephone: G R A N G EW O O D 4004/5 ESTABLISHED 1919 also REPAIRS and REWINDINGS o f a l l classes of Electrical Plant FRACTIONAL BREAKDOWN and MAINTENANCE WELL-EQUIPPED TO 1500 H.P. SERVICE SITE REPAIRS MACHINE SHOP

HORIZONTAL OR VERTICAL MOUNTING FOR LARGE BSS CONDUIT BOX- WARDLE MMMMEE WQl :

£ C l

Price List L587 on appl i cation

WARDLE ENGINEERING CO. LTD. OLD TRAFFORD. MANCHESTER 16 LONDON 34 VICTORIA STREET. S W. I

Brazing is easy ivith the ‘ SECOMAK’ G as Torch (R£GD) hardening, brazing and all other forge work can be completed quickly and efficiently with the high pressure flame of this inexpensive equipment

SERVICE ELEGTRIC Co. Ltd. MT. PLEASANT, ALPERTON, MIDDX. IV October 11, 1946

*#$&#$($($(%'%$(*&$(**)'&*&$(#'%$($&$$($%($+)'&*$&*%#'%+$(($)%'()**%%''%$*+(*$(&$')*%&

minus shadow = plus production

hours of precious time are lost i n that patch of shadow. Errors flourish there, and inaccuracies multiply. No wonder industrialists working under high pressure are glad to find a way to cut the shadow

out ! O s r a m Fluorescent Lamps—next best thing to daylight—provide a steady, even radiance with no hard shadows. Economical, too ! The

8o-watt O s r a m Fluorescent Lamp, for example, gives approximately three times as much light as a tungsten lamp for the same amount of current. This is the logical lighting for industry !

FLUORESCENT LAMPS DAYLIGHT and WARM WHITE 80-watt 5ft. 40-watt 4ft.

AdVt. of The General Electric Co. Ltd. : Magnet Route : Kingtwny. tendon, W.CA PRODUCT

Printed in Great Britain at T h e Ch a p e i. R iv e r P r e s s , Andover, Hants, and published by E le c t r ic a l R e v ie w , L im it e d , at Dorset House, Stamford Street, London, S.E.l.