Electrical Review, July 20th, 1945 HAMS HALL “ B” STATION

Vol. CXXXVII. No. 3530 JULY 20, 1945 9d. WEEKLY

FM80a ii E l e c t r ic a l R e v ie w July 20, 1945 REDUCED PRICES ------for ------SÎEMÈRS ELECTRIC LAMPS BRITISH MADE

Millions of Siemens Lamps for war lit the way to Victory—and to these new low prices for the Public. M ILLIONS and millions of Siemens Lamps were supplied to the Services and to vital industries. Siemens carried manufacturing skill and efficiency to such a point that, to-day, a genuine Siemens household lamp can be offered to the public for no more than one shilling and three pence.

N E W LIST PRICES exclusive of Purchase Tax

SINGLECOIL “ COILED-COIL ”

CLEAR OR PEARL PEARL

W A T T S 2SV 50V 100/130V 200/260V WATTS 200/260V

15 1/9 1/9 1/3 1/3 __ __ 25 1/9 1/9 1/3 1/3 -- — 40 V- V- I/ 3 1/3 40 1/6 60 2/6 2 6 1/3 1/3 60 * 1/6 75 — — 1/7 1/7 7 5 * 1/8 ; 100 — 4/- 1/9 1/9 100* 1 1 0 150 —— 2/9 2/9 — —

Particulars of other price reductions on application * W ill be supplied as soon as available

SIEMENS ELECTRIC LAMPS AND SUPPLIES LTD., 38/9 UPPER THAMES ST., LONDON, E.C.4 July 20, 1945 E l e c t r ic a l R ev ie w

Bull Industrial Motors By courtesy of Messrs. fitted to Centreless Motor Gear & Engineering Grinder. Co. Ltd., Chadwelt Heatk

"BULL' Industrial Motors are the outcome of nearly 50 years' research, development and improvement. "BULL" Motors were selected for many of the most vital of wartime installations because

YOU CAN ALWAYS DEPEND ON . BULL MOTORS E. R. & F. TURNER LTD., IPSWICH AI«o; London, Manchester, Birmingham. Sheffield, Newcastle and Clasgow 2 Electrical Review July 2 0 , 1945

A N C 1 E M T C O M P A S S E S

This pocket compass and sundial in solid silver (early 18th cent.) was made by Baradelle of Paris for the architect to Louis XIV. Darwins permanent magnets serve more precise instruments for sterner purposes.

DARWINS-TOLEDO

DARWINS PERMANENT MAGNETS DARWINS LIM ITED • FITZWILLIAM WORKS • SHEFFIELD

Export Division : DARWINS-TOLEDO OVERSEAS LIMITED, SHEFFIELD. M 10

/ m , D korouqklt/ fou nd Job fo r O utdoo/fem ce

0 All-Steel Weatherproof Cubicle with re­ inforced under-carriage combines excep­ tional strength with lightness. 150 K.w. Outdoor Weatherproof 0 Transportable—easily installed. Glass Bulb Rectifier.

0 Sloping roof prevents accumulation of w ater.

RECTI F I

sj^ Manufactured by the Pioneers in Electrical Conversion.

BRUCE PEEBLES & CO. LTD., ENGINEERS. EDINBURGH. 362 E l e c t r i c a l R e v i e w

V IlfR _ Mode for 30.60.100.l60.200.300 liffgd V ■ \ \ \ & 500 Amps. 600 Volfs; Double, „/ajgh H l | U rriple and four pole and ajith M L jU aW neutral links 0 i Fitted for Conduit, busbar chamber _ flange or cable glands. & a £ y W iring, ttUnimum maintenance LONDON: A W ZELLEY MANCHESTER GLASGOW- 7 3 , G R E A T P E T E R ST., BEL FAST- BURTON-OH-TRENT WE ST M IN ST E R-.SMI BILL SWITCHGEAR LTD EXETER SOUTHAMPTON

B/RCHFTELDS ■ SOII (4 LIN ES) BIRMINGHAM -20 AICHO BIRMINGHAM

s moolfta R unning a s s u re d b y ------HOFFMANN BALL AND ROLLER BEARSNGS

They are also durable and of high efficiency

THE HOFFMANN MFG. CO. LTD. CHELMSFORD ESSEX 4 E l e c t r ic a l R e v ie w July 20, 19^5 July 20, 1945 E l e c t r ic a l R e v ie w 5

TRADITIONAL RELIABILITY

TU RBO-ALTERNATORS TURBINE OR MOTOR-DRIVEN COMPRESSORS AND BLOWERS WATER-POWER OR ENGINE-DRIVEN ALTERNATORS AND GENERATORS CONVERTING MACHINERY SWITCHGEAR, TRANSFORMERS. RECTIFIERS AUTOMATIC SUBSTATIONS POWER FACTOR IMPROVEMENT PLANT ELECTRIC WINDERS. ROLLING MILLS ALL KINDS OF HEAVY ELECTRIC PLANT MOTORS AND CONTROL GEAR FOR ANY INDUSTRIAL APPUCATION (large or small) MAGNETOS, AND ELECTRICAL EQUIPMENT FOR AIRCRAFT REGENERATIVE DYNAMOMETER EQUIPMENTS FOR ENGINE TESTING ELECTRIC SHIP PROPULSION ELECTRIC TRACTION (Road or Rail) INDUSTRIAL HEATING EQUIPMENT CINEMA PROJECTOR EQUIPMENT MAZDA LAMPS. AND MAZDALUX LIGHTING EQUIPMENT ELECTRON VALVES of every description • • • SPECIFY BTH ELECTRICAL EQUIPMENT

B T H R U G B Y THE BRITISH THOMSON-HOUSTON COMPANY LIMITED. RUGBY. ENGLAND A3494 6 E l e c t r ic a l R e v ie w July 20, 19*5 ANNOUNCEMENT

O x

Metrovick Cosmos General Service Lamps are now reduced in price, as follows : —

Type Wattage Price

Clear 15 1/3 99 25 1/3 Clear or Pearl 40 1/3 19 60 1/3 99 100 . 1/» 99 150 2/9 METROVICK

These prices do not include purchase tax. COSMOS LAMPS July 20, 1945 E l e c t r ic a l R e v ie w 7

IkM M IO T ALL INDUSTRIES

H\S>^e DRILLS :K:A , ; '■ w-L/„,Vffo c t l if W\cyG.e Drills and Reamers with their ■"* r [ j simplicity of design combine power with lightweight, freedom from break­ down and exceptionally low operating costs. Greater production is obtained at a fraction of the power costs of compressed air tools. The machine illustrated is the “ 505 ” W^y€\e Drill and Reamer—capacity drilling lj" , reaming 1". f $ > % j p ^ f C The V\\cy£\e range of machines also includes drilling machines from ” W M t k m II fe capacity, Tappers, Screwdrivers, Nutrunners, Grinders, Sanders and Buffers, etc.

COMPRESSORS • PNEUMATIC TOOLS * ELECTRIC TOOLS v DIESEL ENGINES - VACUUM PUMPS

CONTRACTORS’ EQUIPMENT - ROCK DRILLS • DIAMOND DRILLS • OIL WELL "TOOLS ' ^

9ober> ‘ihoro A Partner* C 34 8 E l e c t r ic a l R e v ie w July 20, 1945

ARDING

i n a t i o n

Electric POWER is a mighty sinew of the nation's effort. It must be GUARDED against leakage. Tullis Russell Rothmill Cable Insulating Papers are called upon by leading cable manu­ facturers to perform this task, and it is carried out admirably by these renowned, uniformly high-quality insulating papers. Rothmill Papers are guaran- ed free from metals and grit. Write for details of the com

R O T H m i L L CABLE INSULATING PAPER

T uU it^utuU rC o.iiJ. Auchmuty & Rothes Paper Mills, Markinch, July 20, 1945 E l e c t r ic a l R e v ie w 9 REDUCED PRICES

LAMPS From JULY 16^ 1945 GENERAL LIGHTING SERVICE LAMPS

COILED-COIL p e a r l

Standard Voltages (200-260) s. d. 40 watt 1 6 *60 watt ...... 1 6 *75 watt ...... 1 8 *100 watt ...... 1 10 * A vailable shortly

SINGLE COIL PEARL & CLEAR

Standard Voltages (10 0 -130 & 2 0 0 - 2 6 0 ) s. d. 15 and 25 w att...... 1 3 40 and 60 w att...... 1 3 75 watt ...... 1 7 100 watt ...... 1 9 150 watt ...... 2 9 CLEAR 200 watt ...... 4 6 300 watt ...... 8 0 500 watt ...... 1 0 6

Prices do not include Purchase Tax. Write for Price List 9763 which gives full particulars of all price reductions.

Announcement of Pope’s Electric Lamp Co., Ltd., 5 Earnshaw Street, London, W .C.2 Branches at : Manchester, Leeds, Birmingham, Leicester, Bristol and Belfast 2 0 , E l e c t r ic a l R e v ie w July T H E EMPIRE STORY OF MOFFATS

|NEW ZEALAND j

^ O h r o u q h ¿Em pire ^Oracle (^liann& L

O N T H E SEVEN SEAS KENYA

The pioneering spirit and a firm belief in the value of reciprocal trade between the countries of the British Commonwealth of Nations prompted Mr. T. L. Moffat, the present head of Moffats Limited, to seek abroad in Empire countries a new market for his products. [ so uth AFRICA Í i FIJI islandsI

Starting with shipments to Bermuda, the company has over a period of years developed an export trade which includes a steady and ever increasing market in New Zealand, South Africa, Australia, Kenya, Fiji, India, China. Rhodesia, Newfoundland, and other countries— where Moffats form a high percentage of all the electric'cookers in use.

Meeting world-wide competition in the export field, Moffat electric cookers have established and maintained a proud record for high quality, intrinsic value and efficient service.

MOFFATS LIMITED BLACKBURN LANCS

MOFFAT ELECTRIC COOKERS AND REFRIGERATORS — SOLD THE WORLD OVER July 20, 1945 E l e c t r ic a l R e v ie w 11

a n d n o w . . t h l

CLIP-ON MMETER

The Ferranti Dual-Range C lip - o n A m m eter — for some /ears the leading in­ strum ent for easy ‘clip-on* current measurement — has now a big brother! T he ‘7-Range* has grown up in the midst of busy war-time production and is now ready to establish a new lead in the quick and easy measurement of currents in A.C. con­ ductors.

Fully Insulated Takes tables up to 2*4 in. diameter. Atturaty-3% of lull stale W e ig h t- } lbs.

FERRANTI LTD., HOLLINWOOD, LANCS. London Office: KERM HOUSE. KINGSWAY, W.C. I. 12 E l e c t r ic a l R e v ie w July 20, 1945

I f N 1924 Bullers made the first Vbig bushing of 66 kV capacity. To-day we are able to show this massive 242 kV OIL FILLED BUSHING. The porcelain parts were made in Bullers’ works for the British Thomson- Houston Co. Ltd. It measures 15 ft. 11 inches overall and is one of the largest bushings of this kind yet produced. Only the skill and knowledge acquired by long experience could produce insulators of such dimensions free from flaws. How much larger will be called for in years to come, only the future can say. But one thing is certain, whatever the size, Bullers will be ready with their unrivalled resources and experience to cope with the problem. Bullers i f f SUL A A N D /R O N WORK

BULLERS, LTD- THE h a l l , o a t l a n d s d r i WEYBRIDGE, SURREY Telephone : Walton-on-Thames 2451 Mancheeter Office : 196 Deans*ate, M .nch«t.r - July 20, 1945 E l e c t r ic a l R e v iew 13

L a i j i n c f HENLEY

C a b l e s a t L i H

This photograph taken in 1939 shortly before the war, shows H EN LEY 66 kV. and 132 kV. Cables being installed at Li'ttle- brook Power Station, Kent, then in course of erection. Du ring the war years, Littlebrook has played a very important part in maintaining electricity supply to this country and we are proud that H EN LEY Super-tension Cables have formed the v'tal connectmg link between the generating plant and the ‘ grid ’

Photograph reproduced by courtesy of the Kent Electric Power Co. Ltd., and Mkssrs. Merz & McLellan ( Consulting Engineers).

W.T.HENLEY’S TELEGRAPH WORKS CO., LTD.

Telegrams': K ^ do^ ng*1’ MILTON COURT, WESTCOTT, DORKING, SURREY July 20, 1945 E l e c t r ic a l R e v ie w

THIS MARK IS YOUR GUARANTEE OF A GOOD QUALITY PRODUCT

BARE COPPER,CADMIUM COPPER & BRONZE*WIRES STRIP, STRAND, BARS, RODS, SECTIONS, TROLLEY WIRE, OVERHEAD LINES, TELEPHONE & TELEGRAPH WIRES, FINE WIRES, RADIO AERIAL WIRE,TAPES & BINDERS* COM MUTATOR COPPER, COPPER FORGINGS, FUSE WIRES, EARTH RODS, RAIL BONDS, ETC.

FREDERICK SMITH & CO. (incorporated in The London Electric Wire Company and Sm ifhs Lim '+eel I ANACONDA WORKS, SALFORD, 3 LANCS Telephone: BLACKFRIARS 8701 (8 Lines) Telegrams: ANACONDA iVANCHESTE PLANTJuly 20, 1945 MOTORISATIONE l e c t r ic a l R ev iew 15 USING 'ENGLISH ELECTRIC MOTORS AND OVERHEAD BUS-BAR SYSTEM

View in a factory containing 105 belt driven machine tools.

105 m a ch in e to o ls changed over to in­ dividual motor drive, including all electrical connectionsand motor­ isation of the machines. This changeover is fully described in our publication entitled ‘PLA N T M O T O R ISA T IO N ’

W RITE FOR YOUR COPY to Fusegear Dept. STAFFORD. THE ENGLISH ELECTRIC COMPANY LIMITED London Office: QUEEN’S HOUSE. KINGSWAY, LONDON, W.C.2 WORKS: STAFFORD - BRADFORD - RUGBY - PRESTON July 20. 1945 16 E l e c t r ic a l R e v ie w

p.m oat-p^soSS

* * w rt-TYPt SWITC

REYROLLE C.A.PARSONS iirnniinu nu.Tmir m» ...... HEBBURN-ON-TYNE NEWCASTLE 0N-1YNE ENGLAND Electrical Review, July 20, 1945

A WORTHY AMBASSADOR FOR OUR GREAT ENGINEERING INDUSTRIES. Planned in collaboration with principal Engineering Associations and backed by the resources of Associated Iliffe Press, BRITISH ENGINEERING Export Journal provides a modern vehicle for conveying news of British engineering developments to the principal markets overseas. . . . First Published in 1929, with July issue the journal has been entirely remodelled . . . its post-war format approved by industry.

Published alternate months : 7,000 circulation to engineers overseas : Page size I l f x8-j : Type area I0 "x 7 " : Colour freely available : When paper restrictions are further relaxed, monthly publication of 10,000 copies is planned : Full particulars from :— W . H. Bowers, Advertisement Manager, Dorset House, Stamford Street, London, S.E.I. Electrical Review July 20, 1945 Extra starting torque ?

your motor,

Where you have a drive demanding extra the same if you required other special char­ starting effort, you may think it difficult acteristics. Parkinson Flow Production has to obtain a suitable motor. That is until made it possible to offer a standard range of you look into the Parkinson standard range of over 2,000 types which includes many that A.C. motors. There you will find the Par­ you usually expect to have specially made. kinson “ Tork” — a motor with just that extra The Parkinson A.C. Motor Service can starting torque that is needed. It would be save you a great deal of time and money.

cRomPTon^PRRKinson LIMITED

ELECTRA HOUSE, V 1C TOR, A E MBA NKMENT, LONDON, W fc 2 a n d Branches July 20, 1945 E l e c t r ic a l R e v ie w 19

IN SUPPORT OF THE MINISTRY OF FOOD HERE IS ANOTHER RECIPE FOR YOUR DEMONSTRATIONS:

é J c e & r e a m

Ingredients : 5 pint milk. I egg. 1 dessertspoonful of cornflour or custard powder. 2 level tablespoonsful of sugar, teacupful of evaporated milk. Flavouring of coffee or vanilla essence.

M e th o d : Mix the cornflour with a little of the milk. Boil the remainder of the milk and thicken with the cornflour. Cool slightly and add the egg, well beaten. Return to the boiling plate and heat slowly until it thickens, whisking all the time. Do not let it boil. Leave to cool. W h en set, whisk in thoroughly the evaporated milk and flavouring. Put mixture into freezing tray and allow to freeze in refrigerator.

Cat. No. 192].

l a & j s s * ELECTRIC STOVE Co. Ltd. W ' 143 SLOANE STREET,S LONDON, S.W.I 2 0 E l e c t r ic a l R e v ie w July 20, 1945

Carrying the POWER for Industry

'J'ELCON Power Cables have made a notable Founded 1864 contribution to victory. In a score of essential industries they have carried the current necessary to maintain a ceaseless flow of planes, ships, tanks, guns, and other vital war equipment. And in the PAPER INSULATED, LEAD COVERED peace ahead, TELCON Cables will figure no less POWER DISTRIBUTION CABLES OF ALL TYPES M ADE TO B.S. SPECIFI­ prominently in electrification schemes for post-war CATIONS AND SUITABLE FOR ALL VOLTAGES UP TO 22 KV. Further details industrial expansion. and quotations supplied on request.

TELCONTHE TELEGRAPH CONSTRUCTIONb b & j MAINTENANCECABLES CO. LTD.* Head Office: 22 OLD BROAD STREET LONDON, E.C.2. Telephone: LONdon Wall 3141 Enquiries to: TELCON WORKS, GREENWICH, S.E.10. Telephone: Greenwich 1040. 21 PROTECTED-CACEJuly 20, 1945 E l e c t r ic a l R e v ie w Jti'ook M oM USES For all normal power drives where current restrictions are not too severe. Starting direct 150 per cent, torque with 600 per cent Full Load Current. Star-delta starting gives sufficient torque to start a saw-bench, a normal machine tool, a short length of shafting, etc.

GENERAL It is not always appreciated that an A.C. motor of the CAGE TYPE is the only power unit which has no friction losses apart from the bearings and windage, and, further, that its rotating parts are virtually indestructible, making it the most efficient and reliable type of power unit.

FEATURES Straight through shaft without weakening shoulders. Roller bearing at driving end. Windings impregnated and baked. Lubricators for addition of grease. Dynamically balanced to eliminate all vibration.

OUTPUTS .'.'to 200 H P. for single, two or three phase alternating current supply.

BROOK MOTORS LTD • Huddersfield

Specialists in the manufacture of Alternating (¿urrent Motors in Squirrel Cage and Slip Ring types from I 3rd to 200 h.p. 20,000 h.p. speed types are listed for every industrial use, and thousands of these motors in all types have been supplied to the various countries of the world. W e are the largest Alternating Current Motor Manufacturers in the world.

The Brook Motor factories, where 6,000 motors are made each month. EMPRESS • PRINCESS • DUCHESS WORKS HUDDERSFIELD 22 E l e c t r ic a l R e v ie w July 20, 1945

The Modern Process, using Stannate Tin Solution, produces strictly con­ trolled coatings, predetermined and uniform in thickness, even on articles of irregular shape. Deposits of reasonable thickness may be built up, which are not possible with a tin chloride bath. The solution also permits of a faster speed of deposition.

GREAT HAMPTON STREET BIRMINGHAM 18

I E l e c t r ic a l R e v iew

^ POWER CABLES H 9 + * IN MASS + ♦

Cabling at Southwick Generating Station. Brighton Corporation Electricity Undertaking. Engineer and Manager: H. Pryce-Jones, Esq., M.Eng., M.Inst.C.E., M.l.E.E. Generating Station requires much intricate cabling. We are A equipped to manufacture and install all types of power cable for the most complex system. Standard Telephones and Cables Limited NORTH WOOLWICH, LONDON, E.I6. Telephone : Albert Dock 1401 2 4 E l e c t r ic a l R e v ie w July 20, 1945

Colliery Underground Sub -Station...

TRfinSFORmGRS

Brush Colliery Type Transformers can be supplied to meet Mining Type specifications—details on application.

LOU G MBOROUGM E N G L A N D

BRAN CHES : London, Birmingham, Cardiff, Bath, Manchester, Leeds, Newcastle, Glasgow, Belfast, Dublin July 20, 1945 E l e c t r ic a l R e v ie w 25

EVERY PRACTICAL COMBINATION OF

CAN'BE'ASSEMBLED B.O.T. MINES DEPARTMENT CERTIFICATES Nos. 698, 699. if. ' U V Í & £ jjl, 699//, 698/2.

m RITE FOR FULL - PARTICULARS and QUOTE REFERENCE N.S.M.IO.

. PHOTOGRAPH OF SAMSON ANO M & C FACE BELT CONVEYOR. BY PERMISSION OP MAVOR & COULSON. LTD

B.I. Mining Type Coupling Boxes provide a means of making the cable system as readily transportable as the operating machinery. Extensions, withdrawals and repairs can be effected with minimum expen­ diture of time and material. Colliery electrical systems can be standardised in regard to cable lengths and sizes, with complete interchange­ ability of components. Jointing can, if desired, be carried out on the surface, under best possible conditions. For working pressures up to 660v. and 3,300v.

m m m TYP

JXOC&& BRITISH INSULATED CALLENDER’S CABLES LTD. BRITISH PATENTS NOS. 2 8 8 ,8 8 5 /2 8 $ ,3 4 4 /4 3 3 ,3 2 3 PRESCOT, LANCASHIRE Telephone : PRESCO T 6571 2 6 E l e c t r ic a l R e v ie w July 20, 1945

APPROVED BY /A.I.D. to D.T.D. 599 ' G.P.O. and all other G overnm ent Departments. # Contains 3 cores of extra active non- corrosive flux. No extra Flux required. — — — • s Peedily makes oxidisedso .“ n d , surfaces.i nts on

THE ONLY SOLDER WIRE WITH 3 CORES OF FLUX. Firms are invited to write for comprehensive technical information, including useful tables , of melting points, etc. Sent free with testing sam ples. Single reel rate nominal 1 lb. reels. 13 SWG .... 4/10 16 SWG 5/3 SPECIALISTS IN SWITCHBOARDS ST. MICHAELS STREET Above prices subject to usual trade discount. CONTROL PANELS-DISTRIBUTION CHESTER MULTICORE SOLDERS LIMITED BOARDS - FUSES £ SWITCHGEAR Commonwealth House, New Oxford Street LONDON OFFICE: ABFORD HOUSE, WILTON RD., S.W.I London, W.C.l Tel . CHAncery 5171-2 Telephone : VICTORIA 5780

ffiCIITlhii x \lhJIDU£ t ^ / Note the tongue which ensures perfect and w w .m w * / permanent contact. Easy RESIST/INC to fix. Nuts cannot :E' /UNITS/ turn. All sizes from half to two inches THE DONOVAN ELECTRICAL CO. LTD.. ST HflRY STREET KniGHTON LA HI BIRMINGHAM 9 Electrical Manufacturers and Stockholders BIRMINGHAM 16 BUCKHURST Hill

ffy/t efficiency

The Spiral Tube and Components Co. Ltd. Teohnical Department tVt^sfO Btfes OSMASTON PARK ROAD, DERBY Head Office - Honeypot Lane. Stanmore, Middlesex Telep h o n es - D e rb y 46067-8 Ed g w a re 4658-9 Telegrams-SplralDerby 46067;Splratucom Phone London July 20, 1945 E l e c t r ic a l R e v ie w 27 Service behind the Switch . . . A most comprehensive range of accessories and fittings, cables and conduits, produced in our several Works and Factories to rigid specification ; plus an unremitting attention to customers’ individual requirements, large or small. These have made the name “ EFESCA ” synonymous with DEPENDABILITY. Our constant aim is to main­ tain and extendthatreputation. Now that supplies are so restricted, priority orders must be our first consideration. When trading is resumed in Cabinet Ministers and normal volume, we feel sure our friends will remember Editors call our Managing that for sound manufacture Director “ Charlie,” lesser and efficient service they mortals “ Chas. We now can rely on take pleasure in introduc­ HITEST ing to you “ Charlie’s CABLES Aunt,” photograph above, so called because she had EFESCA her “face lifted” by the WIRING House of Collins about ACCESSORIES 20 years ago and is “ still running. ” COLLINS Collins Electrical Ltd. Head Office IIS Clerkenwell Road London E C 1

22 St. Alban a Place Upper St. Islington N I ,Canonbury 3227-8 1 9 A 11 Feeatherstone Rd. Southall Southall 0168 A FALKS Trade Counter : 34, Queen St., Cheapside, E.C.4 All correspondence to Head Office: Falk, Stadelmann & Co. Ltd., 91. Farringdon Road, London, E.C.I. C .E .L .1S tawell advertising ® 8 9 -IO A 2 8 E l e c t r ic a l R ev iew July 20, 1945 Going down!

ptoii PRICES REDUCED

'1 5 TO 60 WATT NOW 1'3 j 75 WATT NOW ' 100 WATT NOW V9 150 WATT NOW 2'9 Clear and Pearl. 1001130 v Purchase Tax 2001260 v Single Coil. Extra. BE BRIGHT-SAY CROMPTON For details of other reductions please ask for Price List No. D 1033/1

CROMPTO N PARKINSON LTD., ELECTRA H O U S E . L O N D O N . W.C.2 July 20. 1945 E l e c t r ic a l R ev ie w 29

Tut. tut! What are we saying? What we meant to say was, Please pardon this intrusion, but we have been making plastics since 1877, and thus have nearly 70 years of research and experience behind us. In fact, we know a very great deal about plastics, particularly in the form of P.Y.C. extrusion compounds made to G.D.E.S. 18 and all other specifications, and can supply the answer to many an unusual problem. * Why not meet one of our technical experts at our Exhibition Rooms. 6 Hanover Square, London, \V. 1., for a discussion on the ways that plastics mav be able to help you in your business now and in the future? Write, or ’phone Larkswood 4491, for an appointment. *T h is material can only be obtained on allocation from Plastics Control.

B X PLASTICS LIMITED, larkswood works, london, ea 30 E l e c t r ic a l R e v ie w July 20, 1945 AWLPLUG PRODUCTS 9 n bi% dßMUiMA dt all Umajis

RAW LPLU G Durofix repairs everything you would mend with any ordinary adhesive, but it does the job better DUROFIX because Durofix is impervious to heat and water. In addition it is colourless. China, crockery and earthen­ ware repaired with Durofix can be washed in hot water without harming the join. Durofix is invaluable for repairing the binding on Golf Clubs, Cricket Bats, etc., as, once set, it never becomes tacky from the moisture of the hands.

Rawlplug Plastic Wood is like putty to handle, yet RAWLPLUG when it is dry it is just like ordinary wood. For PLASTIC repairing cracks in tables, cabinets and floors, for filling holes, for making mouldings, and repairing WOOD things like knife handles, kiddies’ toys, etc., there is nothing to equal Rawlplug Plastic Wood.

RAW LPLU G This Iron definitely retains its heat in use—an important point on all soldering jobs, particularly big work. The ELECTRIC Standard Model has a 6J oz. pointed bit. It is inexpen­ SOLDERING sive in use, as it consumes only 8o watts. The Iron can be used on either A.C. or D.C. It is available in 3 IRON vo ltages230/250, 200/220, 100/110. Supplied with twin circular flex and lamp socket adaptor. Alternative bit designs are available.

A tool for better Service and Longer Life. The Rawlplug Super Scraper is one of the most efficient and economical Scrapers on the Market. It not only simplifies work and gives a smooth finish but does away RAW LPLU G with scratching, which is a common disadvantage SCRAPER when sand-papering or using inferior Scrapers. The Handle is shaped so as to afford good grip. Handle and Blade carrier are made in one piece of seasoned hard wood, polished and varnished — total length about 6 in. RAW LPLU G A useful card carrying 3 gauges of fuse wire for FUSE W IRE lighting and power — 5 amp., 10 amp and 15 amp. Complete cartons containing 6 dozen cards

THE RAWLPLUG CO. LTD B285 CROMWELL ROAD, LONDON, S.W .7*. July 20,1945 Electrical Review 31

Lig h tin g th a t s a v e s .

Localised lighting is being used more and more because it concentrates full light intensity only where it is wanted. It saves current. M.E.M. Localised Lighting does more. By using the “ Memlo ” Low Voltage Transformer with “ Memlite ” Lighting Fittings, lamps of 12, 25 or 50 volts may be used. These lamps stand vibra­ separate circuit. “ Memlite ” Fittings tion far better, so the lamp bill is can be obtained in two or three arm, reduced, too. At the same time safety light or heavy p atterns, with or without is increased. Even 400 /440-volt the Memlo Unit incorporated, supplies may safely be used for ▼ k Full particulars will be sent localised lighting without a on request. Write for List 252. LOCALISED LIGHTING MIDLAND ELECTRIC MANUFACTURING CO. LTD., TYSELEY, BIRMINGHAM, 11 Specialists in the manufacture of Switch, Fuse and Motor Comyol Qear London Showrooms and Stores : 21-22 Rathbone Place, London, W.1 Manchester Showrooms and Stores : 48-50 Chapel Street, Salford, 3 . 32 E l e c t r ic a l R e v ie w July 20 1945

BATTERY CHARGING RECTIFIERS

SELENIUM METAL RECTIFIERS FOR MAXIMUM RELIABILITY AND ELIMINATING NEED OF REPLACEMENTS.

TRANSFORMER TAP CONTROL FOR MAXIMUM EFFICIENCY AND WIDE ADJUSTMENT OF CHARGING RATE 6NUMBER OF BATTERIES.

MOVING COIL AMMETERS FOR ACCURATE READING OF CHARGING RATE AT ALL LOADS.

NEW CUBICLE CONSTRUCTION GIVING IMPROVED NATURAL DRAUGHT VENTILATION.

POLYCHROMATIC FINISH FOR ATTRACTIVE APPEARANCE &• MAXIMUM DURABILITY.

A s s o c ia te d Compon.es Lancashire Dynamo & Crypto Ltd.. Foster Transformers S S.itchgear July 20, 1945 E l e c t p ic a l R ev iew 33 / n < ;

From the war factory to the armoured spearhead, J. & P. cables play unobtrusive but vital parts. In the happier tasks of peace, they will give equal • • satisfaction.

JOHNSOfi & PHILLIPS LTD C H A R Ä O N • L O N D O N • S.E.

/ L m o n k t U i m tM S t i c i 'lä t U m o m ¿ a OfjxMu,------3 4 E l e c t r ic a l R e v ie w July 20, 1945

WORKS W ONDERS! Up and down the works in search of dirt goes this hand/ heavy-duty A.M. Type BYLO CK Cleaner. Many exclusive features make it an attraction to your priority customers. Trade and technical de­ tails supplied on request. PUMPS FOR WELLS & BOREHOLES OF EVERY DEPTH

T Y P E E.O .E. for Well« *nd Borehole« exceeding 25 ft. In depth. Totally enclosed letf-olllng mechanltm of Patented deilgn. Preclalon workmanship throughout. . Pump can be tupplied complete with 1 h.p. Electric Motor or with fait and loo«# pulley* for belt drive. Capadtle* from 58 gallon« per hour.

We Invite Agents to write for illustrated literature, prices and • discounts. H. J. GODWIN LT0 QUENINGTON, OLOS. BYLOCK ELECTRIC LTD. Ponders End, Middlesex, Eng. CHARLES CLIFFORD P r o d u c t s INCLUDE BRASS, COPPER & PHOSPHOR BRONZE and the undernoted SPECIALITIES T ubes Copper Tubes for all purposes. Brass Tubes in various olloys and specifications. Aluminium Brass Condenser Tubes “ Al-dur-bra ” Pat. No. 308647. Phosphor Bronze Tubes, solid-drawn. Gun Metal Tubes, solid-drawn. Sheet & Strip Brass and Copper Sheet and Strip to any specification and in suitable temper for requirements. Phosphor Bronze Sheets and Strip. C astings Chill-cast Phosphor Bronze and Gun Metal Bars. R o d s Phosphor Bronze Rods (Drawn). Gun Metal Rods (Drawn). Zinc Battery Rods. W ire All Wires for the Metallisation process of Metal ;.S.M. are specialist manu­ Spraying. Zinc Wire. Phosphor Bronze Wire. facturers of tilting type m ercury Ingots Phosphor Copper. Phosphor Tin. switches suitable for instrument work, domestic and industrial ap­ paratus and power control gear. CHARLES CLIFFORD & SON LT WORKS AT : FAZELEY STREET MILL THE MERCURY SWITCH MANUFACTURING CO. LTD. BIRMINGHAM S (HEAD OFFICE) WEST DRAYTON, MIDDLESEX DOG POOL MILLS, BIRMINGHAM July 20, 1945 E l e c t r ic a l R e v ie w 35 ¡1 for Rehabilitation schemes and i all priority work ......

DELIVERY

w i t h o u t DELAY

Write for prices and particulars of T he RIGHT GEAR for the job REVO ELECTRIC CO. LTD.,Tl PTON,STAFFS 36 E l e c t r ic a l R e v ie w J u if 20, 1945

lVeeltes’ W atertight Plugs anti Sockets

Designed for use in conjunction with cranes, hoists and movable electric plant, in exposed situations such as Docks, Quays, Railway Sidings, Ship­ yards, etc., they stand up to the hardest conditions of use.

The type illustrated is one of several arrangements of W / T Plugs and Sockets which we manufacture. It has a swivelling plug and socket with interlocked switchfuse, dummy plug For installation in a pit and terminal type cable box. It or on ground level. avoids sharp bend in trailing cable as Your enquiries for the above and for Switch­ crane passes over the plug point. boards, Switchgear and Cartridge Fuses are invited.

All types are available with or without watertight interlocked Switchfuse. IL „W illi« IS RATINGS up to 300 Amps. 500 Volts, (LUTON) LIMITED D.P. or T.P. Supplied forjA.C. or LUTON, BEDS. D.C. mains. London Office : 36-38 KIN G SW A Y, W.C.2 Telephones : Holborn 1091 ; Luton 278 Full details on request. Branches : Birmingham, Glasgow, Newcastle July 20, 1945 E l e c t r ic a l R e v ie w 37

TO ENCOURAGE BETTER LIGHTING we have pleasure in announcing REDUCED PRICES of the most popular si^es of

LAMPS

SINGLE COIL COILED COIL 100, 110, 120, 130, 200, 210 200, 210, 220, 230 WATTS 220, 230, 240, 250, 260v. 240, 250, 260v. Clear Pearl Pearl s. d. s. d. s. d. 15 1 3 1 3 — 25 1 3 1 3 — 40 1 3 1 3 1 6 60 1 3 1 3 1 6 ★ 75 1 7 1 7* 1 8 ★ 100 1 9 1 9 1 10 ★ 150 2 9 2 9 — 200 4 6 —— 300 8 0 — — 500 10 6 — — ■Jç When available Purchase Tax Extra Ask your supplier for particulars of other reduced prices The British Thomson-Houston Co. Ltd. Crown House • Aldwych • London • W.C.2.

4060 Df 38 E l e c t r ic a l R ev ie w July 20, 1945 July 20, 1945 E l e c t r ic a l R e v ie w 39

Ellison truck switchboard with spring and solenoid operated mechanisms.

506 PRESSURE40 Electrical CHARGING Review JuI>’ 20> 1945 THE RUSTON ENGINE

INCREASED POWER

INCREASED ECONOMY

SMOOTHER RUNNING

• REDUCED SPACE

REDUCED COST

Pressure Charged OIL ENGINES

RUSTON & HORNSBY LTD., LINCOLN Associated with DAVEY PAXMAN & CO. LTD., COLCHESTER E lectrical R eview Managing Editor : July 20, 1945 Hugh S. Pocock, M.I.E.E. Technical Editor : Commercial Editor : Contents :— C. O. Brettelle, M.I.E.E. J. H. Cosens Page Contents continued:— Page Editorial.—Generation Questions 75 Transmission-line Protection. By Hams Hall “ B ” Station 77 D. H. Towns and H. McDonald . 95 Birmingham Report 81 The British Council 100 Electric Motor Maintenance. By Electricity Supply 101 “ Rotor "... 82 Area Extension Inquiry 102 Exhibition at Chester . 84 Ignition Tester 103 Personal and Social 85 Financial Section 104 Correspondence . 87 N ew Patents 108 Watford Agricultural Show 89 Contract Information . 109 Views on the News 90 News from South Africa I 10 Commerce and Industry 91 Overheaddine Charts. By J. S Classified Advertisements 75 Forrest, M.A., B.Sc. 94 Index to Advertisers 84

EDITORIAL, ADVERTISING & PUBLISHING OFFICES : Dorset House, Stamford St., London. S.E.I Telegraphic Address : ” Ageekay, Sedlst, London.” Code : ABC. Telephone No. : Waterloo 3333 (35 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 : British Isles, £2 7s. 8d. ; Canada, £2 3s. 4d. ; Elsewhere, £2 5s. 6d. Cheques and Postal Orders (on Chief Office, London) to be made payable to ELECTRICAL REVIEW LTD., and crossed ” Lloyds Bank.”

ORDERS ARE BEING ACCEPTED ,—„ , without licence or permit I I ---- for civilian requirements

Iff

E! ELECTRIC WASH BOILERS BURCO LTD., ROSE GROVE. BURNLEY 4 2 E l e c t r ic a l R e v ie w July 20, 1945

i y ß f i W l f c V ' f I ELECTRIC I LTD

LONDON BIRMINGHAM MANCHESTER NEWCASTLE

CAMBRIDGES FAULT LOCALISER

This improved instrument gives r the position of a fault as a PERCENTAGE of the LENGTH OF CABLE UNDER TEST to an accuracy of 0 M % . It employs I the principle of the Murray

Loop Test, the slide wire being p : > j ». m MfÆ j si»sfnvrrr replaced by two graduated dials. Large numbers are regularly J i ° * <§■ used in important British under­ I ,/ 10 ^ .1. . - t I o0 L takings. li / I » "> * f »L - 50/ W RITE FOR LIST 160 B-X to r 35 - r 55 50 45 40 A PMCEiTAGC Of f • • CAM7. IEMTM - 'I lo CAMBRIDGE INSTRUMENT CO. LTD. I3.GR0SVEN0R PLACE, LONDON, S.WI.

W o r k s : L o n d o n a C a m b r i d g e 6603 E lectrical R evie °0 L ITECHNltQ THE OLDEST ELECTRICAL PAPER - ESTABLISHED 1872

Vol. C X X X V II. N o. 3530. JU L Y 20, 1945 9d. W E E K L Y

Geiieraiioii ()ue§tioni§ Thermal Efficiency and Coal Conditions TH1HREE or four years are normally achieve low generating costs with fuel of * required for the design, erection and appreciably lower than average calorific commissioning of a new power station, value is in itself a merit that deserves more and several more years may elapse before than the negative reward it received in it reaches its intended full capacity. The flat-rate increases in the price per ton impossibility of anticipating in the original irrespective of heat content. plan and the difficulty of introducing at An advantage of planning a station in a later stage the results of experience and' two sections is that it facilitates the technical advances accruing during the adoption of more elevated steam conditions intervening period were discussed by for the second half, if economically Mr. F. W. Lawton (now electrical engineer desirable. A change might be expected and manager of the Birmingham under­ in the present instance, in view of higher taking) in a paper he presented before the fuel costs, had not reason for pause been Institution of Electrical Engineers in given by the increase in capital expenditure March, 1939. His remarks principally this would entail. To raise steam con­ concerned Hams Hall “ A ” station, but ditions from 670 lb. per sq. in. and 845 deg. even in those days he had to report a rise F. to, say, 1,200 lb. and 950 deg. would add of 50 per cent, in coal costs over the about 26 per cent, to the first cost of the previous three years. That would be more boiler plant, though only 9 per cent, in the than enough to upset the nicety of the case of turbines. balance between the value of high thermal Waiting Upon Results efficiency and the cost of attaining it. In this connection Mr. Lawton holds High Prices and Wide Variety that sufficient operating data to warrant The same and other disturbing influences a departure from the present steam cycle have been even more applicable to the will not be available until the pioneer high- “ B ” station, some preliminary particulars pressure plants in this country have been in of which were given in the I.E.E. paper operation for at least two years. At the mentioned. Designs for this station, which electrical end, technical progress appears is described in this issue, were laid down in to have been achieved at less cost. Instead 1938 on the basis of coal at 14s. per ton. of continuing with 33-kV transmission to With the last addition, the price is now the city area, 132 kV is to be employed for presumably over 33s. per ton for bituminous the second half of the station, with switch­ coal of widely, varying characteristics ing at that voltage by means of 2,500-M VA obtained from about seventy different circuit-breakers. colleries—a factor which, in conjunction Simplicity of plant layout, which is with the possession of a large area for ash reflected in the pleasing contour of the disposal, decided the employment of main building, is no doubt responsible for pulverised-fuel firing. The ability to the relatively small staff required which, 7 6 E l e c t r ic a l R e v ie w July 20, 1945 for the completed station, is expected not willing to return, special efforts will be made to exceed one man per 1,000 kNV—rather by the Ministry to see that they do so. It less than half the average number. Results can well be imagined that if these employees achieved to date, despite exigencies of have been receiving abnormally high w'ages wartime construction and operation, they will not be anxious to relinquish them, which would have given this cooling-tower but* it is to be hoped that they will realise station third place in the Electricity Com­ that their present employment cannot last missioners' last thermal-efficiency tables for ever and that they will do their best to (1938), are evidence of remarkable fore­ get back to their normal w'ork. Electrical sight in the initial design. appliance makers should take immediate steps to “ nominate ” their former em­ “ loss " of an hour T h e ployees and the same considerations apply Darkness last Sunday was accen- to the electricity supply industry. Dispelled tuated by black cloud in many places so that the T h e first application of resumption of full public lighting, per­ Coil Winding quality control to coil mitted from that day, took place in and Q.C. winding, as far as we are appropriate circumstances. Most of the aware, was recently made authorities did their best to restore then- by an electrical concern in South-West lighting to the fullest possible measure England. According to the Production though some were handicapped by lack and Engineering Bulletin (V ol. 4, N o . 29), of equipment and others (relying mainly which describes the particular method on gas) were prevented by lack of adopted, the result has been an appreciable attendants front taking advantage of the reduction in the number of final rejects occasion. A “ high light " of this " Feast with consequent saving in labour and of Lanterns ” was the inauguration of material. Hitherto unsuspected causes of a system of fluorescent lighting on a five- trouble have been brought to light and mile stretch of the Uxbridge Road through the performances of different operators and Ealing. different machines can be readily compared. At regular intervals five coils are taken A n R.A.F. officer Releases from (M.I.E.E.) complained in from each winder and the resistance of the R. A.F. our issue of June 29th each is measured. The average and range that officers in the of the five readings are then plotted on Technical Branch of the Service had little the appropriate sections of the chart. hope of an early return to civil life, to the The scope for quality control in this field detriment of their careers. An announce­ should be very large. ment made last week appears to throw a W h i le spark testing of better light on the situation. This gave Cable cable dielectrics is probably details of proposed releases during August Testing almost as old as the water- and September and it included Groups 3 immersion test, the neces­ to 15 for electrical engineers in the Tech­ sary precision equipment has become nical Branch and Groups 6 to 15 for those available only in recent years, as Mr. J. H. in the Administrative and Special Duties Savage pointed out in his I.E.E. paper last Branch. It is hoped that this ruling will May. It was mentioned only as an enable our correspondent and others in alternative to immersion -in Government his position to resume their civil posts Departmental Electrical Specification No. 1 within a very short time. (War Emergency Edition, 1945) relating R e v e rs io n to norm al to rubber-covered cables for from 250 to Labour production, particularly 660 V to earth. In an addendum covering Shortage of domestic appliances, is p.v.c. cables the opportunity is taken to being seriously retarded by recommend strongly the adoption of the lack of suitable labour, biit now men and spark test instead of the high-voltage and w omen who were taken from this work and insulation-resistance test in-order to save sent to war munitions factories should be water-immersion and subsequent drying able to return. The Ministry of Labour ot the core. The spark test is. however^ has instituted a system by which employers not applicable to larger cables, but in view' in certain important groups can apply for of its advantages an extension of the their former employees, and if the latter are present range is to be expected. July 20, 1945 E l e c t r ic a l R e v ie w 7 7

K I llaiiis Hall " I* " Details of Construction with Operating Results of S ta tio n First Tw o 50,000-kW Sets

ARTICULARS have now been released One effect of maximum regenerative feed P of the second cooling-tower generating heating is an appreciable reduction in the station to be constructed by Birmingham size of cooling-tower equipment required. Corporation on the Hams Hall site. The Make-up water is pumped from the River first 50,000-kW set o f the six ultimately Thames. envisaged was put on load in April, 1942, With each turbo-alternator are associated and the second about fourteen months later. two tri-drum 320,000 lb. per hr. boilers A third set now under construction will generating steam at 670 lb. per sq. in. and complete the first half of the station. The 845 deg. F. The boiler plant was manu­ turbines are the Parsons two-cylinder tandem factured by International Combustion, Ltd., reaction type driving at 1,500 RPM 50,000- which was also responsible for the coal- kW 33-kV main alter­ handling plant. nators and 3,500-kW 3- 3- The newest generating station in Combustion chambers kV auxiliary alternators. the Central England area, designed are water-cooled with fin Steam conditions at the for an ultimate capacity of side tubes and plain-tube turbine stop valve are 300,000 kW , has already shown screens. Automatic 650 lb. per sq. in. and 825 itself to be among the most ther­ superheater control, deg. F. Four stages of mally efficient in the country steaming and non-steam­ feed heating are employed ing economisers and giving a final feed temperature of 340 deg. F. plate-type air heaters with air recirculation with an exhaust vacuum of 28-5 in. Hg., are other characteristics. The soot blowers which has been found to be the most are manually operated and water lancing is economical when cooling towers are used applied in the superheater zone and on the and the atmosphere is at 60 deg. F. and 80 water-screen tubes. Pulverised fuel is used per cent, humidity. Each two-pass con­ and there are three ( 10-ton per hr.) mills denser requires 40,000 gal. of cooling water per boiler, the output from each being with­ per min. at 75 deg. F., which is circulated drawn by an ekhauster fan and supplied by 50 per cent, duty pumps (three for each to,two burners. Two forced-draught and two unit) and has three steam-jet air ejectors of induced-draught fans per boiler are driven similar proportionate ratings. by variable-speed motors of Laurence, Scott The two ferro-concrete cooling towers are and Electromotors make. individually rated at 5 million gal. per hr.— Two 600,000 lb. per hr. Mather and Platt enough to serve 75,000 kW—and are 310 ft. feed pumps, one steam and one electric high and" 209 ft. in diameter at the base. are installed. All boilers are operated from 78 E l e c t r ic a l R e v ie w July 20, 1945 the firing floor, which is open to the turbine to a 300-acre tip, 800 yd. away. Escape of floor, and at this level all important motors dust into the boiler house is minimised by are installed that are not in the basement. operation of the precipitation plant under Practically all coal is rail-borne, a maximum negative pressure, the induced-draught fans o f 8,000 tons per day being dealt with by being in its outlet. Flue gases are discharged gyratory sidings and by three sets of duplicate into a lined steel duct and thence conveyed to inclined belt conveyors, each unit having a the 400-ft. brick stack. duty rating of 120 tons per hr. Distribution Works motors of 100 HP and over are over the coal pile is by means of a travelling wound for 3-3 kV generally supplied direct transportation bridge with cross-traversing from the auxiliary alternators with stand-by telpher, which has a reclaiming capacity from works transformers, one of which is of 120 tons per hr. The Mitchell Engineering associated with each main alternator. Smaller Co. was responsible for this plant. motors itre operated at 400 V. Eleavy ash passes from the hoppers below The main 33-kV 1,500-MVA Reyrolle the boilers into a gravity water trough, switchgear of the small-oil-volume metal- sluiced by purge water from the cooling clad type, which uses freon as an insulating towers. Fine dust is caught by a Lodge- medium, is installed in three separate houses, Cottrell 60-kV (rectified-DC) electrostatic one for each generating set. The busbars plant and discharged by conveyors into the form a ring to which seven feeders are also

One of the 50,000-kW turbo-a te<-nators sluice. The water-ash is conveyed to a connected. Isolators are interposed in swirl pit from which it is elevated 65 ft. by the busbar between each circuit breaker. The means of pumps with rubber-lined impellers switchgear is normally operated from the to a trough along which it flows by gravity control room but a duplicate control board July 20, 1945 E l e c t r ic a l R e v ie w 79 is in each switch-house for emergency use. The circular control room, which is remote from the main build­ ing, contains a diagram board and the usual electrical con trol features, in addition to which shadowgraph instruments indicate boiler loads and steam and vacuum con­ ditions. In the design o f the

m m Boiler-house control equipment

satisfactory. A system of ultra-violet lamps in fluorescent reflectors, giving an average intensity of illumination of 0-02 ft.-candle and a maximum of 0 04 ft.-candle made it unnecessary to black out the windows. Foundations and superstructures are of ferro-concrete and all plant is supported from the ground independently of the main structure. The station is run by 19 engineers and 135 manual workers. Its capital cost for the first half comes out at £30 per kW. Transmission lines to the city will bring the total figure to approximately £5-45 million. It is estimated that with 300,000 kW installed the cost of the station will reach £10-5 million plus £1-5 million for transmission.

Above : Side elevation of 320,000 lb. per hr. pulver- ised-fuel boiler Right : Basement of boiler house showing ash hoppers

buildings Civil Defence requirements o f the Electricity Com­ missioners had to be kept in mind and the brick walls were made 14-in. thick with no external w in d o w s below the level of the plant. Nevertheless, the natural lighting is 80 E l e c t r ic a l R e v ie w July 20, 1945

Last year, the first complete twelve months was not restricted by external circumstances. of operation of the two 50,000-kW sets, For the boilers, excluding the survey period, about 685 million kWh was generated at the figure varied from 82-8 to 89-5 per cent. Hams Hall “ B.” Deducting 7-45 per cent, For both turbo-alternators the percentage as works consumption, this left 6 W million was 89-5 per cent., but failure to achieve 100 kWh sent out with a maximum demand of per cent, was not owing to defects in the 103,100 kW. A consumption of some machines themselves. 384,000 tons of coal having a calorific value Our thanks are due to Mr. F. W. Lawton, of 9,439 BThU per lb. gave an overall chief engineer and manager, City of Birming­ thermal efficiency of 26-7 per cent. ham Electric Supply Department, for supply­ Other technical particulars (average values) ing the particulars on which this account is are as follows:—Pressure (abs.) at turbine based. The principal contractors, other than exhaust, 0-72 lb. per sq. in.; cooling water those already mentioned include the inlet, 65-6 deg. F., outlet, 77-3 deg. F .; following:—Main buildings, Sir Robert outlet flue gas, 278 deg. F.; feed-water to McAlpine & Sons; chimney stack, P. C. economiser, 345 deg. F .; C 0 2 in outlet flue Richardson (Middlesbrough), Ltd.; main gas, 13-5 per cent.; feed-water make-up 3-3 and auxiliary cables, Callender’s Cable & per cent, of 6,404 million lb. evaporated. Construction Co., Ltd.; low-voltage wiring, Works costs, per kWh sent out, during Pyrotenax, Ltd.; telephones, Standard Tele­ the same period were:—Coal, at 30s. l-5d. phones & Cables, Ltd., Clifford and Snell, per ton, 0-2188d.; coal and ash handling, Ltd.; auxiliary motors, British Thomson- 0 0099d.; oil, water and stores, 0 0016d.; Houston Co., Ltd.; axuliaries switchgear,

Main 33-kV switchgear salaries and wages, 0 0090d.; repairs and George Ellison, Ltd. ; miscellaneous electrical maintenance, 0 0102d. ; total, 0-2495d. supplies, General Electric Co., Ltd., Metro- Operation of the p.f. plant cost 9-70d. per politan-Vickers Electrical Co.. Ltd., W. Lucy ton, made up o f 1-OOd. in wages, 3-86d. in & Co., Ltd.; battery, Tudor Accumulator repairs and maintenance and 4-84d. for Co., Ltd. ; cranes, Vaughan Crane Co., Ltd., power (26 kWh per ton). Herbert Morns, Sir William Arrol & Co., As the station was run on base load the Ltd. ; pumps, Gwynnes Pumps,‘Ltd., Tangves, availability of the plant (expressed as a Ltd., Adams Hydraulic, Ltd. ; flue-gas percentage of the total hours of its operation) ducting, Simon Carves, Ltd. ; fire-protection July 20, 1945 E l e c t r ic a l R e v ie w 81 equipment, Atlas Sprinkler C o.; water screens Considerable and widespread damage was F. W. Brackett & Co., Ltd.; air compressor caused to the main transmission and distribution and pipework, Worthington Simpson, Ltd.; cable system and substations during 1940-41. Nechells generating station sustained major damage, but the two power stations at Hams Hall escaped with a small amount of damage notwith­ standing their isolated position which pro­ vided a prominent target area of some 500 acres. Claims amounting to £225,750 have been submitted to the Electricity Com­ missioners in respect of war damage to the Department’s pro­ perty. The cost of protective work for the Department’s plant and other air raid pre­ cautionary measures amounted to £ 110,000, towards which Government grants totalling £40,500 are receivable. Revenue for the past Main control room year was £4,703,820 (against £4,674,141 in steam and teed piping, Stewarts & Lloyds, 1943-44), and the trading expenditure amounted Ltd.; water piping, Brightside Foundry & to £3,803,279 (£3,810,019), which included £60,000 for any contribution which may be Engineering Co., Ltd., Whittaker Ellis, required under the special War Damage Act A. E. Shaw, Ltd., E. E. Jeavons & Co., Ltd. for public utility undertakings which jt is understood will be promoted. The balance carried forward to net revenue account is Birmingham Report £900,541 and miscellaneous credits have Basic Tariffs Maintained increased this to £950,863. After meeting capital charges, income tax, etc. (including a ¥ N a report on the accounts of the Birmingham special payment of £100,974 to accelerate Electric Supply Department (engineer, Mr. the redemption of loans in respect of F. W. Lawton) the Committee records that out Nechells Princes generating station), the of a total of 7,143 million kWh supplied in the surplus on the year’s working is £33,130 six years from April 1st, 1939, 4,983 million (£42,047). To this is added £497,482 brought kWh went to war factories. The annual sales forward from 1943-44. After meeting certain rose from 815 million kWh in 1938-39 to 1,353 items of a quasi-capital nature amounting to million in 1943-44, and fell to 1,262 million in £32,899, a balance of £497,713 is carried the past year. The maximum supply demanded forward. When circumstances are opportune, has increased from 325,500 kW in 1938-39 to the work of changing over from DC to AC is 457,500 kW in 1944-45, and the number of being continued and during the year the sum consumers from 283,479 to 307,318. The of £1,431 was spent in this connection. Department has operated under very great Additional loan capital raised during the difficulties, but the Committee feels that these year, mainly to finance extensions at Hams have been surmounted in an admirable manner. Hall, together with associated transmission In spite of higher coal costs, the increased lines, amounted to £710,922, the sum actually efficiency of Hams Hall “ B ” station and the spent being £741,083. The total capital raised extensive hours during which a considerable to date for the purposes of the undertaking supply has been taken have made it possible amounts to £23,768,912, of which £10,659,685 to avoid any increase in basic tariffs; certain of has been redeemed. An additional £938,409 the larger consumers are affected by a coal has been provided for redemption, making clause. £11,598,094. 82 Electrical Review July 20, 1945 Electric* Motor Maintenance A Variety of Faults and their Remedies

CASE of electrical unbalance B y “ R o t o r ” with time lags, caused the starter A of a rotor recently brought to to trip. The motor was dismantled my notice concerns a 120-HP 440-V three- and it was seen that the rotor had rubbed on the phase slip-ring motor. Two years ago this stator, causing slight damage to the core plates machine began to knock and some cotton fluff and the insulation of the rotor conductors. in the machine smouldered, so that the starter Also one of the soldered joints in the rotor was tripped out by hand. It was then found conductors had thrown its solder and become that one portion of the rotor had evidently open-circuited. There was about 0-010 in. rubbed on the stator, as the slot wedges and wear in the driving end sleeve bearing and slot insulation in one section of the rotor it was at first thought that this had allowed and in about two-thirds of the periphery of the rotor to rub and that the resulting excess the stator were so badly charred that they current had melted the soldered connection. broke up and fell out, whilst several lamina­ However, the records of the air-gap clearance tions of the cores near the teeth had turned between the rotor and stator showed that the blue through overheating. minimum clearance had previously been Insulation resistance tests gave satisfactory 0-025 in. It was therefore evident that the results for both the stator and rotor and, as faulty joint had been the cause and not the the motor was over twenty-five years old, it effect of the failure, this producing un­ was decided not to run the risk of damaging balanced magnetic pull and deflection of the the coils by renewing the slot wedges, but to rotor shaft. The cause was probably a continue to run the machine as long as faulty joint in the first place, although the possible without them. There was a certain motor had run for more than ten years amount of wear in the white metal bearing without trouble. at the driving end and it was thought that this had allowed the rotor to pull over, so a Foreign M atter in Air Gaps new bearing was fitted. When the motor was In another breakdown, a 12^-HP 440-V returned to work, however, it was noted 1,460-RPM screen-protected squirrel-cage that the ammeter occasionally indicated a motor, which was supplied by the makers of very high stator current so that further tests the lathe that it drove, after eighteen months’ became necessary. service would not start when switched on; the pulley could not be turned even when Deflected Rotor Shafts the driving belt had been removed. The It was then seen that one of the sliding design of the motor did not allow of checking slip-ring short-circuiting-contacts was rather the air-gap clearance between the rotor and burnt and distorted and the corresponding stator with feeler gauges. When dismantled contact was also burnt, due to wear of the the motor was found to be rather dirty and. operating sleeve of the brush-lifting and although the ball bearings were in order, the slip-ring short circuiting gear. Apparently rotor was polished and appeared to have this contact had failed to make a proper been rubbing on the stator core for a width connection at times, with the result that the of about 2 in. at each end. The motor was resistance of the three phases of the rotor cooled by air drawn through the ends of the circuit became unequal, the consequent machine and discharged through the centre unbalanced rotor currents and magnetic pull o f the periphery. It was decided that dirt causing the shaft to be deflected so that the drawn in with the air had accumulated in the rotor rubbed on the stator. The defective air gap and caused the rotor to rub on this parts of the brush-lifting and short-circuiting dirt and finally to jam ; possibly the air gap gear were renewed and the machine has since was uneven round the stator bore and the run without further trouble. This failure dirt had been forced into the narrowest could have been avoided by careful main­ portion. This has been confirmed by several tenance. months of satisfactory running after thorough A second case concerns a 20-HP 500-V cleaning and re-assembly. As the stator and 720-RPM three-phase slip-ring motor. The rotor cores cannot be cleared of such a overload trips, set at 42 A and provided deposit without dismantling, a totally \% July 20, 1945 Electrical Review 83

enclosed motor should have been used. The air-gap clearance between the rotor f t Four holes were drilled in the motor end- and stator of a 100-HP 400-V 585-RPI& slip- shield at equal points opposite the air gap ring induction motor was found to vary to permit of feelers being inserted to measure appreciably from time to time. Upon dis­ the air gap clearance from time to time. mantling the motor it was revealed that the d t h t s u s In a further somewhat similar instance a shaft was slightly bent and that the rotor ^-HP 230-V 1,425-RPM single-phase repul- had rubbed slightly on the stator, although r o b b e d ^ sion-start induction motor driving a fan was without causing damage. The shaft was •kecorepia rewound but after it had run for a few hours, stretched in a lathe and the air gap increased 1 «UllKj the fuses melted and the motor jammed. by 0'008 in. by taking a light skim off the s i n k * Considerable force was required to remove stator and rotor cores. The motor drove a iiullstj the rotor and the cause was then seen to be mill through worn gearing, which had wot, varnish which had trickled into the air gap. probably caused undue stress on the rotor Apparently the motor had not been properly and was therefore renewed. ! hid baked out after impregnation. It should be esdiijfc mentioned that the motor was mounted on a Defective Windings and Bearings t d i O K K drying chamber under a glass roof and An example of failure through defective f - s p d ® received the full effect of the sun’s rays on windings is provided by a 50-HP 400-V Mik hot days. 580-RPM slip-ring motor, which was bought second-hand and was little used for a few years. tiio n ik I Faulty Drives n d aH ih '.- When put into continuous operation trouble x n d s r An example of trouble owing to faulty quickly developed due to rapid wear of the PtOdlffl!. drives was experienced when, out of a batch brushes and burning of the slip-rings. The Am j of thirty 10-HP 400-V 1,425-RPM three- sleeve bearings were slightly worn and there is putt phase squirrel-cage induction motors driving was a certain amount of vibration; also Mlitar lathes through vertical belts and fast-and- there was about 15 per cent, variation of :to t j loose pulleys, two rotor shafts broke off at stator current in each phase. The resistances the driving-end ball bearing within twelve of the stator and rotor windings were tested months. This type of drive requires a high and found to be equal on each phase. By ir Cip> belt tension in order to maintain frictional feeding the windings with low voltage DC and using a compass needle it was revealed that IPI grip. In addition to this disadvantage, however, the motors were mounted on over­ one of the stator coils was reversed. After correct connection the motor ran satis­ ytkmta; head girders in such a way that the belt was factorily. The faulty connections must have itest on the portion of the motor pulley farthest from the bearing when it was on the fast been made at the time of some previous BSltWl driving pulley and vice versa. As a result repair many years before. Bed i s « the overhung shaft was subject to maximum Fifteen 20-HP 400-V 720-RPM squirrel- noil" bending moment at the same time as it was cage motors were installed to drive line k n o fc ta fe exerting maximum twisting torque. As the shafts through gearing. After about eight i d s m w motors or pulleys could not conveniently be years the machines got very noisy. It was reversed a tension pulley was fitted on each found that the internal cooling fans on uteiwc drive to increase the arc of belt contact with three motors were fractured and there was remofdff.: the comparatively small motor pulleys. evidence of hammering of some of the ball eared to if In a textile factory several i-HP 400-V bearings in their housings. ’ It would appear re for n r 1,400-RPM ball-bearing squirrel-cage motors that the bearings had not been a good fit in "he motor1 were fitted on the floor to drive finishing the housings when the motors left the maker’s he ends o f: machines. The shaft of one motor broke works and, as gear drives sometimes impose eh l i s o f off on the inner side of the driving-end fairly high stresses, new end-shields and ded iM * bearing, and a number of bearing failures bearings were fitted. luJatedioB occurred on other motors in a short period. A 30-HP motor was required in a hurry to i rub on ® The horizontal driving belts were rather drive a countershaft. As one was not i lie air? heavy for such a low-powered drive and available it was decided to use a 20-HP and jr e and ^ were fitted with solid metal belt fasteners. a 10-HP motor, both squirrel-cage 400-V n a/ro, f The belts were not flexible enough for the 720-RPM machines, in parallel to drive the I by setts 4-in. diameter motor pulleys so that belt shaft through belts. Results were satis­ r rfiorouf tension was excessive. After fitting thinner factory for many months until it was noticed s i a i o r a t belts with lighter and more flexible fasteners that the smaller motor was very hot. Current f such i there was no further trouble. tests revealed that the latter was taking touib 84 E l e c t r ic a l R e v ie w July 20, W45

about half the total load, owing to stretching armature fouling the field poles. This case of the belt on the larger motor. This type indicates one of the benefits resulting from of drive, though not ideal, is a useful expedient measuring the air gaps of machines from provided both motors are independently time to time. protected against overload and that the A 12-HP 400-V 720-RPM three-phase drive is kept under observation. The motors squirrel-cage motor driving a conveyor belt were controlled by a single large starter, through gearing tripped out frequently one which did not provide discriminating protec­ morning and finally the motor refused to tion for the smaller motor, so separate run. It was found that the motor shalt had starters were fitted. broken off inside the driving-end roller A 10-HP 400-V 1,440-RPM three-phase bearing. The motor was not rigidly mounted, squirrel-cage motor driving woodworking and there was considerable backlash in the machines tripped out frequently. The motor gearing due to the motor pinion being worn; was directly coupled to a countershaft and apparently the shock of frequent stopping was very stiff to turn, even after removal of and starting had set up fatigue o f the shaft. the belts. A spirit level disclosed that the A new motor pinion was fitted with the new countershaft was not level, owing to sub­ shaft and the motor properly mounted, after sidence of the foundations on which the this attention no further trouble was ex­ bearings of the shaft were mounted. This perienced. had caused a considerable stress on the Front time to time the ball bearings of motor shaft and overloading. motors in hot and dirty positions have failed, The air gap of an overhung exciter for a frequently due to the breaking up of the 250-kW 250-V 500-RPM DC generator was retaining cages of the balls. Apparently the found to vary appreciably over a period of grease becomes disintegrated, dirt enters the about nine months, until the clearance on the bearings and extreme friction develops. In bottom side of the armature was only about such positions it appears very desirable that one-eighth of that on the top side. the old grease should be washed out period­ Investigation revealed this to be the result of ically and the bearings repacked about three- wear of the outer ball bearing of the generator, quarters full with new grease having a high and this was renewed in time to prevent the melting temperature. Exhibition at Chester electricity supply authorities (Chester, Imperial Machine Co., Ltd., Jackson Boilers, Mersey Power Co., Ltd., Mid-Cheshire Ltd., the Peerless Electrical Manufacturing Electric Supply Co., Ltd., Electricity Distribution Co., Ltd., Perrin Hughes & Co., Ltd.. Vent- of North Wales, Ltd.. Oswestry and Mold) are Axia, Ltd., and (he Victor Manufacturing Co., this week sponsoring an “ Electricity Looks For­ Ltd. ward ” exhibition in the Chester Town Hall. The Deputy Mayor of Chester (Councillor This exhibition recently had a three weeks' K. Clarke) who presided at the opening of the premiere at Manchester where it attracted exhibition said that the first temporary houses 34.000 visitors. All the main exhibits including to be provided in Chester would be electrically the series of model kitchens have been trans­ equipped. There were now 960 farms taking ferred to Chester, together with a number electricity and last year they consumed 4.658,000 of additional electrical appliances. kWh for which they paid £22,500. The Cor­ Some of the heavy electric baking equipment poration's supply area was one of the most seen at Manchester have been omitted but, intensively developed electrically in the whole of in view of the valuable pioneering work done Great Britain. The municipal electricity show­ in farm electrification by Mr. S. E. Britton, the room was visited by 100,000 people per annum. Chester electrical engineer, the section devoted Mr. V. W. Dale, general manager of E.D.A.. to farm equipment has been considerably speaking of the future of the electrical industry, strengthened. Equipment collected from farms referred to the possible saving of coal through in the Chester rural area includes incubators, main-line railway electrification. water-heating systems, steam raisers (in actual use), pumps, drilling and workshop plant, compressors and sterilising chests. Among canteen equipment is a cafeteria set Fostering Industrial Research lent by “ Quaintways," one of the best equipped i lI16 Federation of British Industries is tc all-electric restaurants in the country. New io*I of.Jl ay c°nference in London in the equipment includes a set of three convectors •Hn/filttrll111« °a y sPrinS on the subject ol made by Rowe Bros. & Co., Ltd., who also w ilfu l lain Research." Special emphasi: show for the first time three heating or drying will be laid on the practical means by which cabinets. Rouses show one of their newest research can assist industry and promott fish frying ranges. Other exhibitors not at industrial efficiency, exports, full employmen Manchester are E.C.D., Ltd., E.L.M .A., the and a higher standard of living. P to y m e n July 20, 1945 E l e c t r ic a l R e v ie w 8 5 PERSONAL and SOCIAL News of Men and Women of the Industry

M ®E L F AST Electricity Committee has agreed to Bone, F.R.S., in the Chemical Technical a suggestion by the Ministry of Commerce Department of the Imperial College of Science that Sir Leonard Pearce, engineer-in-chief of the and Technology. After practising at the Bar London Power Co., Ltd., shall be appointed until the outbreak of war, he worked first with arbitrator on the question whether certain the Coal Commission and, later, on various plant shall be installed at the Harbour power industrial production and research problems at station or at Ballylumford. the Ministries of Supply and Aircraft Production. Mr. Alfred J. Ryan is retiring from the position To re-establish the Federation of British of borough electrical engineer and manager at Industries’ contacts overseas, its foreign director, Hastings, which he has held since 1927. Mr. Mr. C. F. I. Ramsden, has visifed France and Ryan was bom in Chat­ Belgium and will shortly go to Norway, Sweden, ham and received his Denmark and Holland, and, later, to Italy, technical training in Switzerland and Spain. that town, passing in Mr. R. N. Pegg, M.I.E.E., A.M.Inst.C.E., has 1895 to the Royal Dock­ resigned his appointment as chief engineer to yard there. Two years the Charing Cross and City District of the later he joined the Chat­ Central London Electricity, Ltd., and taken up ham, Rochester & Dis­ an appointment in the Export Department of trict E.L. & P. Co. the English Electric Co., Ltd., at Queen’s (predecessor of the Kent House, Kingsway. Electric Power Co.) and We reported in our issue of July 6th the retire­ served as shift engineer ment of Mr. J. A. Hunn from the position of until 1901 when he went director in charge of marine sales to Laurence, as assistant engineer to Scott & Electromotors, Wimbledon Electricity M r. A. J. Ryan Ltd. The company has Department. In 1903 now sent us a portrait he was appointed station superintendent to the of Mr. Hunn which is Gillingham municipal undertaking and subse­ reproduced herewith. quentlybecame chief assistant engineer. He As was stated in our went to Hastings in 1913 as deputy borough earlier note Mr. Hunn electrical engineer, becoming chief fourteen will continue to be years afterwards. Mr. Ryan is a member of the closely associated with I.E.E. and an associate member of the Institution Laurence, Scott. He is of Mechanical Engineers; he has served the succeeded by .Mr. R. industry in a number of capacities including Clarke. chairmanship of the E.D.A. Southern Area Committee and Electric Refrigeration Com­ Mr. A. J. King, M.Sc. mittee and membership of the B.S.I. Committee Tech., M .I.E.E., of the on Domestic Electric Refrigeration. He is Research Department of M r. J. A. Hunn honorary consulting electrical engineer to two Metropolitan - Vickers hospitals. Electrical Co., Ltd., Trafford Park, has had the Mr. Ryan’s successor is Mr. James Savage who degree of Doctor of Science conferred upon him has been his deputy for some time. The appoint­ by Manchester University. Dr. King has ment, which carries a salary of £1,071, is for one written a number of papers on noise and vibra­ year, in the first place. tion and has served on several B.S.I. and E.R.A. committees concerned with radio interference, Dr. B. J. A. Bard, B.Sc., D.I.C., Barrister-at- noise measurement and lightning surges. He Law, who has been appointed secretary of the has been in the Metrovick Research Department Federation of British Industries Industrial for the past twenty years. Research Committee and head of the F.B.I. Research Secretariat, the duties and functions Mr. Albert Kent has, due to ill-health, retired of which include the encouragement of industrial from the board of Kent Brothers Electric Wire and national interest in research, maintaining Co. & E. H. Phillips, Ltd. He has been associa­ contact with all industrial research organisations, ted with the company since its inception. and providing a service whereby advice, assist­ Oldham Town Council last week approved a ance and information can be obtained and recommendation fixing the salary of Mr. E. Binns, contacts made. One of the first tasks of the the chief electrical engineer and manager, at Secretariat will be to organise and conduct a £1,500, rising by annual increments o f £100 to the survey of existing research facilities in Britain. maximum in accordance with the scale based on Dr. Bard began his professional life conducting unit assessment. One councillor criticised this. fuel research, under the late Professor W. A. He said the business of paying men on units sold D5 8 6 E l e c t r ic a l R e v ie w July 20, 1945 was bringing the position down to a piece-work members of the executive staff. Yorkshire basis and was degrading to officials of high readers will recognise Lieut.-Commander J. C. standing. Turnbull, peacetime representative for that When a recommendation that Mr. J. A. territory and now serving with the Royal Navy Ogden should be appointed deputy borough who, together with Lieut. A. J. Gardner of the electrical engineer was considered by the London area, obtained special leave to attend Oldham Council it was suggested that the the conference. position should have been advertised so that Mr. W. R. Rawlings who recently celebrated Service men and some in other positions could the diamond jubilee of his marriage to Mrs. have the chance of applying. The chairman Rawlings asked his friends that any presents of the Electricity Committee replied that there should take the form of gifts to charity. The was a dearth of electrical engineers and Mr. E.I.B.A. tells us that as one result it has received Ogden had every requisite qualification. The a cheque for ten guineas. appointment was confirmed. Mr. H. R. Watts, to whose retirement from the Following the appointment of Mr. G. 0. position of meter superintendent of Hammer­ Edwards as borough electrical engineer and smith Electricity Department we referred last manager at West Bromwich, Mr. G. R. Auchter- week, has been in the service of the Council for lonie has been promoted to the position of chief thirty-nine not twenty-nine years as stated. technical assistant and Mr. P. H. Flatt becomes chief administrative assistant. The Islington Borough Council is advertising for an engineer and general manager to succeed A set of inscribed silver entrée dishes was Mr. A. P. MacAlister who is retiring. The com­ recently presented on behalf of the staff of the mencing salary will be about £1,683, plus £34 Lowestoft electricity and transport under­ cost-of-living bonus. takings to Mr. H. H. Saunders, who has retired from the position of general manager. The Mr. G. A. Paisley, B.Sc. Eng. (London), new general manager, Mr. G. W. Steward, A.M .I.E.E., assistant electrical engineer to the presided. Malvern U.D.C., has been appointed chief electrical engineer as from August 1st, in Mr. L. V. Cartwright, formerly personal succession to Mr. E. D. Wootten, who is retiring. assistant to the general works manager of Mr. Paisley, who is thirty-seven, was born at A. C. Cossor, Ltd., has been appointed personnel Carlisle, where he received his electrical training manager of the company’s Highbury group of factories. Mr. Cartwright joined the company with the electricity undertaking. From 1931 ten years ago, and during that period has to 1933 he was junior assistant engineer and filled many executive positions. personal engineering assistant to Kennedy & Donkin, consulting engineers. Going to Mal­ Mr. J. H. Aston, of Tube Investments, Ltd., vern in 1933 as mains assistant, he was promoted •has resigned from the board of Stewarts & to assistant electrical engineer in 1937. Lloyds, Ltd. Mr. P. G. Carew, also of Tube Investments, Ltd., takes his place as a director Mr. E. J. Fouracre, sales manager of the of Stewarts & Lloyds, Ltd. Westinghouse Brake & Signal Co., Ltd., and Mr. D. F. Brown, assistant to the managing The Midland Electric Manufacturing Co., Ltd., recently held its first sales conference since director, have been appointed directors. 1939 at the head office of the company at To mark the occasion of his retirement from Birmingham. The conference was presided the service of the London Power Co., Mr. W. A. over by Mr. W. L. Barber, founder and chair­ Mackenzie, chief superintendent engineer at man of the company, and the photograph shows the Battersea generating station, was presented him with the company’s representatives and by Sir Leonard Pearce on July 5th with a

Representatives and head office staff at the recent M .E.M . sales conference July 20, 1945 E l e c t r ic a l R e v ie w 87 cheque and vellum scroll suitably inscribed by Mr. S. J. L. Hardie has been appointed chair­ his colleagues. Before joining the London man of Electrical Switchgear & Associated Power Co., Mr. Mackenzie served with the Manufacturers, Ltd. (which controls Brook- Glasgow Corporation, the West Ham Corpora­ hirst Switchgear, Ltd.) in the place of the late tion and the Charing Cross Electricity Supply Mr. J. A. Hirst. Co., Ltd. Mr. J. E. Betts, supervisor of purchases for Mr. W. H. Metcalfe, electrical engineer and the British Thomson-Houston Co., Ltd., and manager at Bacup, has been appointed chief chairman of the A.E.I. Group Purchasing engineer of the Morley Electricity Department. Committee, died suddenly at his home in London on July 14th in his seventieth year. Obituary Mr. W. S. Clark, chairman of the Oakham Mr. A. M. Johnston, construction superinten­ Gas & Electricity Co., Ltd., has died at the age dent of the East African Power & Lighting Co., of sixty-eight. Ltd., was one of eleven persons who were killed Will.—Sir John Ambrose Fleming, the dis­ when an aircraft taking off from Nairobi last tinguished radio scientist, left £56,651 (net week crashed and was burnt out. personalty £53,791). CORRESPONDENCE Letters should bear the writers' names and addresses, not necessarily for publication. Responsibility cannot be accepted for correspondents' opinions. Fluorescent Lighting with a longer fluorescent tube, when these > N experiment which I recently carried are manufactured, as up to within 9 in. of out in the lighting of a billiard table the edge of the table, the light-meter showed with fluorescent lighting had as its aim an 20 ft.-candles. increase in the intensity of light over the The county champion was invited to try whole table surface, with avoidance of the out the new lighting. He considered it ideal, stroboscopic effect that fluorescent lighting the balls being much more clearly defined, and in his opinion there was no eyestrain what­ tends to give with regard to moving objects. Tests were first taken with normal billiard ever. With white fluorescent tubes I found that stroboscopic effects were noticeable and table fighting, that is with three 100-W lamps the fighting effect was not to be compared in the usual type of shade hung lengthways with “ warm-white ” tubes. over the table. A light-meter gave the following values in ft.-candles: Corner Workington. A. C. A d d is o n . pockets, 7; centre pockets, 1 0 ; centre fine of table (end), 9, (centre) 20. These tests Concerning Trams showed that the illumination over the whole ■REGARD IN G Mr. B. J. Prigmore's letter table surface was not uniform and that the * in your June 22nd issue 1 suggest that corner pockets had the least amount of fight. the tram is rather a dangerous vehicle. In Two fluorescent fittings with 5-ft. 80-W the first place it has to be fitted with a cow­ “ warm-white” tubes were then hung across the catcher life-guard, a very crude encumbrance, table. After trying various heights and posi­ and instances are on record of people being tions, it was found that a height of 4 ft. and run over by trams, despite these precautions. a distance of 2 ft. 9 in. from the cushion at In my personal experience trams have been aach end of the table gave the best results. stopped by fog before other traffic on the Both fittings were on the same phase. Tests road. Skidding on curves has caused derail­ were again taken and gave the following ft-> ments resulting in serious accidents, e.g., at candles: Corner pockets, 15; centre pockets, Kennington Oval about 1933. A big objec­ 15 ; centre line of table (ends) 20, (centre) 2 0. tion is the hold-up of cars following one that These tests showed a very much more uni­ has developed a fault. With the trolley-bus, form and increased spread of fight over the succeeding cars can easily by-pass the defec­ whole table surface. Glare and shadow were tive vehicle. Again there is the cacophony entirely absent, and stroboscopic effects non­ when either new or old trams pass over points existent however the balls were hit. and other trackwork. The consumption was reduced to 160 W The trolley-bus can be run about 25 per with vastly increased efficiency. The differ­ cent, more cheaply and, unlike the tram, can ence in illumination between the centre fine pull into the kerb," thus eliminating many of the table and the pockets will be overcome dangerous occurrences between platform and 88 E l e c t r ic a l R e v ie w July 20, 1945

kerb. As the towns and roadways have notion that people spend time and money in already been constructed, special tram working out patents only in order to suppress avenues are obviously impracticable in most them, is an obvious absurdity. It is this cases owing to the limitation of space, but continued misrepresentation that prevents us the rails and conduit, if any, form a serious from having patent laws that should en­ menace to cyclists. The cycle is one of the courage invention. major forms of transport, especially in pro­ People believe that it is better to make it vincial towns. In one instance in South impossible for a man to hold an invention for London, when a cyclist got both wheels long, so that it may become the property of jammed in a slot conduit, no fewer than forty the nation without payment. They do not trams were held up for over two hours. see that the effect of this treatment is to I am a member of an electrical research suppress British inventors and to make us establishment and in no way connected with dependent on other nations for ideas, also that tramways. manufacturers cannot afford to spend large Watford. A . R . G r ie r s o n . sums o f money on developing ideas where patent rights have been destroyed by prior Engineers and the Public publication; many inventions have to lie ■»ECEN T statements by politicians that unused through this. our industry is in a chaotic condition We must try to educate the public and get give an idea ofthe public’s ignorance of en­ them to understand that the people are the gineering. Many councillors going round a chief beneficiaries of our work. Some 200,000-k W station wonder what the men do to presumably intelligent people have been pass the time away. Tell them o f 1,400 lb. per astonished when I have told them that they sq. in. pressure and of temperatures so high were debtors to the electrical industry for that the steam pipes are red hot, as in the new cheap electricity and excellent apparatus, as plant at Battersea, and they think it has all they believed that engineers worked only for come automatically, by the inevitableprogress money ! of science. Tell them that in the years of war Tynemouth. C. T u r n b u l l , m .i .e .e . although everything, taxes, cost of coal, salaries and wages, have risen enormously Purchase Rights in Northmet Area electricity on the whole has rather come down J N the notes on this subject appearing in in price, and they see no merit in it, believing your issue of July 6th, 1945, it is stated that it is only necessary for a controlling “ It is understood that the conferences committee to give instructions and the have been convened by the Joint Electricity whole thing is done. Show them an electric Authority at the request of the Electricity lamp and tell them that there is fifty years of Commissioners and the Ministry of Fuel intensive research by makers at a cost of and Power in order that a post-war many hundreds of thousands of pounds, and reconstruction scheme might be evolved they cannot believe that so trivial an object and better distribution of electricity took that effort. obtained.” In a newspaper article we were told that in In order to avoid any misunderstanding, 1945 we could have motor-car engines of it should be made clear that the conferences to teacup size and working on high octane which reference is made in the note have spirit, high-frequency current for roasting been called with the knowledge, but not meat quickly and cheaply, and greatly im­ at the “ request,” of the Electricity Com­ proved electric lamps,- if “ other interests ” missioners or the Ministry o f Fuel and did not interfere. The writer did not state Power. The Minister, in November, 1944, that all these are the result of years of indicated, on the general question of the research by scientists, inventors and manu­ exercise or non-exercise of purchase rights facturers who have spent millions of pounds in the London and Home Counties Electricity in getting results which are not yet perfected District, that he was fully aware of the great but are being made available for use. importance of the subject, and that full The electric lamps have been developed regard was being given to it in the Govern­ from the Moore tube of fifty years ago, the ment s consideration of the reorganisation high speed petrol engines have been in a con­ of the electricity supply industry. tinuous state of development ever since London, W.C.2. . L e s l ie G o r d o n , motor cars came, the high-frequency oven Clerk and Solicitor, will not so far do the work stated. The London and Home Counties J.E.A. July 20, 1945 E l e c t r ic a l R e v ie w 89 Watford Agricultural Show Comprehensive Display of Electrical Equipment

A JOINT display by the Watford Electricity functions which a unit of electricity will Department and the Northmet Power Co. perform. of electrical appliances for use in the farm and Electrical methods of measuring moisture in in the home attracted much attention at an grain, wood, etc., were demonstrated on the agricultural show held last Saturday by the stand o f Marconi Instruments, Ltd., and electric Watford & District Agricultural Society at fences were to be seen on the stands of the

U E C fitn FOR

Display of farm and domestic electrical appliances arranged by the Watford Electricity Department and the Northmet Power Co. at the Watford Agricultural Show Cassiobury Park. Despite present-day diffi­ Harvest Saver (Si*Implement Co., Ltd., and the culties a remarkably comprehensive display of Cooper-Stewart Engineering Co., Ltd., the apparatus was assembled and throughout the latter also showing clipping and shearing day demonstrations were given of electrical machines and a battery charger. “ Kulectra ” equipment for the dairy, barn machinery, 12-V lighting plants fitted with liquid-cooled pumping, egg testing and grading, tomato lampholders were exhibited by K. F. Rushton. grading, home laundry and fruit bottling. Besides milking machinery, sterilisers, coolers, cold room, bottle washers and water heaters, The Sun’s Eclipse etc., the dairy exhibit included an electric milk PECIAL seven-day observations of the sun’s pram. partial eclipse by the moon on July 9th were The now well-known “ Essex ” mill was a organised by the Department of Scientific and prominent feature of the barn machinery section, Industrial Research. British radio services, which also included mixers, root cutters, sheep both military as well as civil, including “ Radar,” shearers and a model of a grain drying and were utilised and the National Physical storage plant. There was an electrically operated Laboratory sent special apparatus to the north of Scotland for “ sounding” the upper cultivator and other horticultural apparatus atmosphere to observe how the reflection of included portable spraying plant, a nursery pulse signals from ionised strata might be circulating pump,- soil-heating cable, plant affected by diminution of radiation from the irradiator, greenhouse heaters and a forced- sun. The lower (Heaviside) layer is caused draught fan for horticultural boilers. Poultry to be reflective by ultra-violet light from the sun, farmers were also interested in the latest types since both radio and optical eclipses occur of incubators, brooders, poultry pluckers and at the same time and place. Some investigators suppose the higher (Appleton) layer to be of the poultry house lighting fittings. Pumping plant, same origin whereas others are inclined to the bench grinders, portable electric drills, welding view that it is due to showers of material plant and battery chargers completed the farm particles ejected from the sun. If the latter section. surmise be correct, then the radio eclipse should In addition to a centre-piece formed by a have occurred earlier in time by perhaps an “ Poplar ” kitchen unit, the domestic appliance hour or two than the optical obscuration. section included four different types of cookers, The fact that this month’s eclipse, duration 2-5 hours, 90 per cent, obscured in Scotland at water heaters, washboilers, a washing machine, 3.50 p.m. (D.B.S.T.), took place at about noon refrigerators, vacuum cleaners, fires, kettles, (G.M.T.) on a summer’s day should have lighting fittings, irons, soldering irons, and a enabled the two ionised layers to be separately potato peeler. In the centre of the stand an observed more distinctly than at times of inquiry bureau drew attention to the various previous eclipses. 9 0 E l e c t r ic a l R e v ie w July 2 0 , 1945 Views on tlie \ews Reflections on Current Topics

A QUESTION put to me recently was possibly be considered in that light. The m whether a severe electric shock could development of wind and water power and affect the arteries permanently, as is some­ the generation of electricity at the pithead times supposed. The particular reference by gas turbines which the author advocates was to the sudden deaths recently, within would not make a Welsh Electricity Board a short time of one another, of two into a T.V.A. The idea of a Board may electrical engineers, about fifty years have its merits, but why drag in the T.V.A. ? of age. The coincidental feature was that * * * both of them some time ago received shocks There has been much discussion of the at 1,730 V to earth, but were able to resume question who should pay for mains and work shortly afterwards. The post-mortem services to temporary houses which are likely examination in each case gave the cause of to become redundant in due course—the death as a coronary-occlusion blood clot electricity supply undertaking or the housing lodged in the artery from the heart, the authority. The Ministry" o f Health has arteries being prematurely hardened. A rather hedged on the question as was high medical authority to whom I submitted indicated in the annual report of the LM.E.A. the case tells me that he cannot imagine that I note that at Swansea the Corporation one heavy dose of current could have the Electricity Committee has suggested that result indicated. Coronary thrombosis, he the Housing Committee shall make a con­ says, which is not uncommon and not tribution of £8 per house to supply 2,817 necessarily fatal, occurs at a time of life when houses on the town’s new housing and trading physical powers are undiminished and the estates which, presumably, are permanent, arteries have deteriorated through disease. not temporary. The total capital expenditure This should dispose of any fears of a “ delayed is put at £92,000 so that the proposed con­ action ” effect in similar circumstances. tribution represents about a quarter of the « * » cost. In view of the great advances that have * * * been made during the war in the use of German bombs laid waste a good deal of electricity on farms I was not surprised at the Farringdon Street, E .C ., and the head offices interest shown in the joint exhibit of the of Babcock & Wilcox, Ltd., have suffered Watford Electricity Department and the severely. They have been hit twice and only Northmet Power Co. at the Watford & one wing now remains in use. Emergency District Agricultural Society's show. A good offices have been taken at Elstree, Epsom and deal of enterprise has been shown in the other places round London, but this has been organisation of this show and the success of found very inconvenient. Now, I learn, the the function more than exceeded expectations. company has just purchased for £65.000 a Much of the credit may be attributed to an modem building comprising about 21.000 electrical man, for the hon. secretary is none sq. ft. at Buxton House, Little Trinity Square, other than Mr. D. G. W. Ackworth, manager Queen Victoria Street, and this will be used of the G.E.C. Cooker Department. until it is possible to construct in Marylebone * » * Road, opposite the Marylebone Town Hall, Advocacy of a “ T.V.A.” for Wales con­ a new seven-storev building in which the tinues. I have just received a pamphlet by whole of the London offices will be centralised. R. T. Pierce, originally submitted to the * * - * Welsh Reconstruction Council in 1941, Printers have an established sign language in which the subject of electricity supply for use in the correction of proofs and it is in Wales, is discussed and a body on the lines as well for authors to be acquainted with it. of the Tennessee Valley Authority is proposed. They may secure this knowledge bv pur­ But so far as I can see the ODly resemblance chasing British Standard No. 1219 (2s. post which the suggested Welsh Electricity Board free) from the B.S.I., 28, Victoria Street, would bear to the T.V.A. would be its S W.l. This has been prepared with the overall control of electricity production. assistance of a number of printers’ and It is admitted that electricity is sold cheaply journalists organisations and may therefore by the T.V.A. because that side of the be considered authentic. From an editor’s Authority’s activities is secondary to its P°mt of view the most useful section is great flood control and irrigation under­ probably that giving recommendations for takings which bear the civil engineering the preparation of “ copy” for the printer; costs.' There could be no comparable basis observance ol these would save much labour in Wales, unless a Severn Barrage Scheme, and greatly reduce the consumption of which the pamphlet does not mention, could aspirin in editorial offices.—REFLECTOR July 20, 1945 E l e c t r ic a l R e v ie w 91 COMMERCE and INDUSTRY Reviving Civilian Production. Payment During Illness.

either directly or through the usual channels for Man-Power for Industry the goods concerned. Applications for shipping fMVHERE is abundant evidence that the rate of facilities, in duplicate, giving the French import release of men and women from the Services licence number, should be addressed to the and workers from the munitions industries Commercial Counsellor to the French Embassy, will be slower than is required to meet the 3, Albert Hall Mansions, London, S.W.7, demand for labour for essential “ civilian ” and must be accompanied by two copies of the production. Therefore as a means of relevant invoices. All other correspondence accelerating transfers from war factories to concerning shipment should be addressed to peacetime industry the Ministry of Labour and “ Service du Transit,” French Purchasing National Service has introduced a system by Mission, 20, Queen Anne Street, London, W .l. which their former employers can “ nominate ” Goods should be consigned to “ IM PEX ” men and women for early return—if they are (for the importers’ account) at port of unloading willing to return. Should their present employers in France. The French Government is also wish to retain them they will have to give prepared to issue licences to export from France “ overwhelmingly strong reasons.” The scheme on private account, the position being in general applies to six groups of industries, one o similar to that with regard to imports on private which includes electricity supply and another account from other overseas countries. “ housing fitments.” As regards the latter class special reference has been made to the Control Orders production of gas and electric cookers. Employers who wish to secure the return of Mica.—The Control of Mica (No. 4) Order, former employees should notify the Ministry 1945 (S.R. & O. 1945 No. 813), amends the of Labour of their present employment and Control of Mica (No. 3) Order, 1944, so that inquiries will then be made by the appropriate built-up mica and mica-splittings other than local office of the Ministry with a view to book-form splittings are exempt from control arranging their release. Workers who wish under Ministry of Supply Orders. Inquiries to return to their former employers may concerning this Order should be addressed to facilitate matters by writing to them, asking the the Ministry of Supply, Mica Control, Euston employers to nominate them for release. House, Eversholt Street, London, N.W.l. Diamond Tools.—The Minister of Supply has released Mr. R. L. Prain from his appointment Sick Pay for Supply Workers as Controller of Diamond Tools and the Five weeks at two-thirds pay followed by seven Control has been terminated. Any inquiries in weeks at half pay will be payable to employees connection with diamond tools should, in future, in the electricity supply industry under a sick be addressed to the Raw Materials Department pay scheme approved by the National Joint (R.M .1A.), Shell Mex House, Strand, W.C.2. Industrial Council for the Electricity Supply Mr. Prain will continue to act as Controller of Industry to come into operation on August 1st. Diamond Dies and as Controller of Quartz To qualify for benefit an employee must have Crystals. completed one year’s continuous service with an Iron and Steel.—The Control of Iron and Steel electricity undertaking. One half of the (No. 42) Order, 1945 (S.R. & O. 1945 No. 814), statutory benefit paid under the National Health increases the prices of wire nails, the thinner Insurance Scheme will be deducted from pay­ sizes of heavy plates, certain types of forging ments, which also will be reduced if the employee ingots and forgings afnd wire ropes; provides is receiving compensation for any industrial for an increase in the merchants’ cutting margin disease or accident under the Workmen’s on heavy steel bars and sections; and reduces Compensation Act or Employers’ Liability the price of cemented hard metal finished tool Acts. tips. Bolts and Nuts.—The Control of Bolts and Private Trade with France Nuts, etc. (No. 8) Order, 1945 (S.R. & O. 1945 No. 815), revokes all previous Control of Bolts, The French Government is now prepared to Nuts, etc.. Orders and removes all restrictions grant licences for import on private account of on the acquisition and disposal of bolts, nuts, spare parts and replacements for all types of screw studs, washers and rivets. The maximum machinery and equipment, and other manu­ price provisions of the revoked Orders are factured products in quantities less than 5 tons remade in consolidated form. in weight and less than £5,000 in value, excluding industrial plant and machine tools. Importers will apply in France to the appropriate Tropical Packaging authorities for import licences which will only Recommendations for the preservation and be granted in respect of goods required to meet packaging of technical equipment for despatch essential needs, and when these are issued will to tropical theatres of war in the Far East have be able to obtain the foreign exchange necessary been issued, at the request of the Anglo- for the purchases. Normal United Kingdom American Packaging Committee of the Ministry export licensing procedure will apply to goods of Production, as Supplement No. 2 to B.S. subject to licences on export under the Export 1133/1943, which code dealt fully with of Goods (Control) Order, and applications mechanical protection. The new supplement, should be made to the Export Licensing Depart­ which supersedes the first one published last ment, 4, Fenchurch Avenue, London, E.C.3, year, is concerned specifically with problems 9 2 E l e c t r ic a l R e v ie w July 20, 1945 of the tropics. The wide range of goods covered would lay electricity on. She ordered three includes electrical and telecommunications extra lights and paid him 10s. A witness from stores, some 1,560 items being individually Thornham Magna said she ordered five fights listed to furnish a typical guide for the treatment and paid 15s. Defendant, who admitted of similar products. The three principal obtaining six other sums, was stated to have methods of packaging that have been stan­ served for seven years with the Royal Engineers dardised in Britain and the United States are and to have been wounded and discharged with . described in detail, with step by step sequence a disability pension. He said he was short of of operations illustrated at appropriate points. money and wanted to get his wife to Newcastle. A table shows the whole range of preservatives He was bound over for three years and ordered and packing materials normally specified by to make restitution of the money and pay Government Departments, each identified by a £3 Is. costs. number and title, with short notes on methods of application. The recommendations are not Widow’s Claim Fails mandatory so that detailed instructions of In February last year a linesman employed Government departments should be complied by the Derbyshire & Nottinghamshire Electric with at all times. The new document, of 198 Power Co., Thomas Paling, received a fatal pages including index, is obtainable for 5s. shock while working on a part of the company’s from the British Standards Institution, 28, overhead system. It was stated at the inquest Victoria Street, London, S.W .l. that Paling thought that the lines had been disconnected when actually one of them was E.D.A. Joins House-Building Committee still “ live.” The British Electrical Development Associa­ At Nottingham Assizes recently his widow tion has now become a member of the House- claimed damages from the company on behalf Building Industries’ Standing Committee. The of herself and two young daughters. Counsel membership of this Committee totals twenty-two for the plaintiff contended that the company associations, representing industries allied with had not complied with electricity regulations house-building. The Committee is engaged on and that the system of working was unsafe. On selecting, from plans submitted in a competition, behalf of the company it was maintained that thirty from which houses of the English Paling, as an experienced workman, should traditional type will be built. have satisfied himself that the lines were safe to work upon before beginning the work. County of London Plan The judge, Mr. Justice Macnaghten, dismissed the action with costs, holding that there were A report of the Town Planning Committee no grounds for the suggestion that the company of the London County Council on the County had failed to take reasonable precautions. of London Plan recommends the development of a series of communities comprising several neighbouring units, and the matching of the French Railway Voltage residential accommodation to the industrial In an article on French railways published provision. In cases where it is desirable to in the Electrical Review of June 22nd (p. 918) segregate industry from residential areas the operating voltage of the electrified Paris- industrial estates should be established; some Lyons line was stated to be 1,13 0 ; it is actually of them sited in the outer parts of the county 1,500. to provide work locally. Three principal density zones are advocated averaging 200, 136 Electric Turret Clock and 70 persons per acre, a mixed development The twelfth-century parish church of Rippin- of houses and flats being allowed in each zone. gale, near Bourne, Lincolnshire, now possesses the first electric turret clock to be erected since Ship Welding the ending of hostilities in Europe. It has three Recommendations by the Admiralty Ship skeleton dials and strikes the hours on the tenor Welding Committee for the guidance of ship­ bell of the ring of six. The mechanism, in two builders, designers, inspectors and foremen parts, is mounted on a main bedplate, one engaged in the fabrication of ships’ structures for operating the dials and releasing the striking by welding have been issued by the Stationery and the other for striking the hours. The Office in the form of a booklet (M.2) containing timekeeping portion is driven by a synchronous six pages of text and eighteen sheets of sketches motor which rotates at 200 RPM. The rotor and drawings. The object is to set out those is made from a special alloy of the “ Nifal ” type and as the motor is self-starting, a non­ factors which need special consideration for the reversing attachment is fitted to ensure that it is confinement of locked-up (residual) stresses impossible for the clock to run in the wrong within safe limits. direction. The reduction gearing of the time­ piece is of the wheel-and-pinion type, all “ Electricity Canvass” Prosecution totally enclosed in an oil bath. A defendant at Hartismere (Norfolk) Sessions The striking unit is made up of a single recently was stated to have canvassed villagers snail-cam of heavy design, rotated by a small saying that he was from the East Anglian motor through worm-reduction gearing. The Electric Supply Co. A sub-postmistress at cam depresses the lever which is coupled to Stoke Ash said defendant told her that one free the striking hammer and makes one complete light and one free plug would be put in and any rotation for each blow. An attached “ locking- additional lights would cost 5s. each. He said P , rnecnamsm is also stepped at each blow he was there to take orders, and she paid him fn !^e 50r.r?ct hour has been struck 10s. for which he gave a receipt. Another h;„ ,i° ,n r“ lllng ^ e driving motor is resident of Stoke Ash said defendant informed thT npyt hn the umt stops until released at her that if the company could get 35 names it the next hour. The reduction gearing of the July 20, 1945 E l e c t r ic a l R e v ie w 93 striking unit is enclosed in a casing and runs in 0 05 to 4 HP at 12 and 24 V of 2-5 to 4-5 in. an oil bath. It is also provided with ball diameter; also three-phase 200 to 450 cycle bearings at all major points. 100/250 V of 0-3 to L5 HP and 4 in. diameter The clock is the gift of Mr. Joseph William as well as tachometer generators. Smith in memory of his mother, who was a Frank Whitelegg, 90, Robin Hood Lane, former resident of the parish. It was dedicated Sutton, Surrey.— Priced list (BAW) describing and set going by the Rector, the Rev. J. E. a winding machine of the stationary armature Williams. Without time controlled AC a far type. more massive and complex mechanism would have been necessary. Cheaper Lamps * A reduction in the prices for “ Ensign ” and Exhibition of Inspection Equipment “ Ekco ” lamps is announced by E. K. Cole, Ltd An exhibition of inspection equipment is being held by the Sheffield "Trades Technical Societies Australian Manufacturers’ Council from August 20th to 25th in the Cutlers’ Hall, The Federal Council of Electrical, Radio Sheffield. The Gauge and Tool Makers’ and Telephone Manufacturers of Australia has Association is co-operating and several member- been formed in Sydney. Mr. L. P. R. Bean firms will be exhibiting. is the president and Mr. G. S. Noek secretary. Incidentally, copies of the 1945 edition of the Association’s Members’ Handbook are now Factory Managers’ Year Book available on application to the secretary, Mr. G. \ A list of the membership is a feature of the T. Beach, Standbrook House, Old Bond Street, Year Book produced by the Institution of Fac­ W .l. tory Managers, 63, Gayton Road, Harrow, Middlesex. The publication also includes the “ Passport to Peace ” Institution’s accounts and the secretary’s and This is the title of a booklet prepared by the treasurer’s reports for 1944 and the presidential United Steel Companies for the information address of Sir Murdoch Macdonald. of its former employees now serving in the Forces and Merchant Navy. Its possession Leigh Creek Coalfield admits any of these employees to any depart­ ment of the companies’ organisation in which Tenders (Melbourne) states that favourable they formerly worked to enable them to renew reports on the development of the Leigh Creek old acquaintance and it gives some useful coalfield have been made by two South advice and offers of assistance as a supplement Australian Government engineers, Messrs. H. T. to the Government’s “ Release and Resettle­ Angwin and F. H. Harrison. During a visit ment ” booklet. to the United States many boilers were seen which burned fuel of a much higher moisture Flameproof Apparatus content than the Leigh Creek coal. The usual quarterly schedule of electrical equipment, both mining and industrial, for Fatalities which certificates of flameproof enclosure were Motor Mechanic’s Death.—John Trant Woods issued by the Ministry of Fuel and Power (Coal (42), a motor mechanic, was found dead with Division) during the three months ended June the wire of an electric drilling machine touching 30th is now available. At the request of the his face. The wires in the plug had become B.E.A.M.A. a few copies can be purchased frayed. At the inquest at Frodsham a verdict for Is. 2£d. post free from the Library, Ministry o f “ Death by misadventure ” was recorded. of Fuel and Power, King’s Buildings, Dean Shock from Refrigerator.—At an inquest held Stanley Street, London, S.W.l. at Lambley, Notts, it was stated that Susan Radford (54), who was scrubbing the floor of a Trade Publications shop, was found lying unconscious with her British Thomson-Houston Co., Ltd., Bridle arm in contact with an electric refrigerator. Path, Watford Junction, Herts.—Infra-red Evidence was given that the machine was not bulletin (No. 2) illustrating and describing efficiently earthed, due to rubber insulation “ Mazda ” radiation lamp ovens of various having perished. The coroner said he thought shapes and sizes for baking painted objects, it important that such machines should be drying papier mache containers, softening periodically examined. plastics, drying small coils, steel tubes, latex on fabrics and coil-box heating. Annual Holidays Siemens Electric Lamps & Supplies, Ltd., 38, Mitchell Electric, Ltd., is closing its works Upper Thames Street, London, E.C.4.— New and offices from July 20th to 30th. list (No. 976) giving full particulars of lamp Brook Motors, Ltd., are closing their works price reductions. from August 10th to 20th. J. G. Statter & Co., Ltd., 82, Victoria Street, The Aberdare works of Aberdare Cables, Ltd., London, S.W .l.—Illustrated booklet (No. OCB- will close from July 28th to August 7th. 2) containing maintenance instructions for oil- immersed circuit-breakers. Trade Announcement Delco-Remy & Hyatt, Ltd., Church Street, Owing to the completion of Government war Dunstable, Beds.—Illustrated brochure con­ contracts Malcolm & Allan (London), Ltd., taining technical data on miniature motors for have closed their offices at Toft Lodge, Brox- actuating aircraft ancillary devices; both totally bourne. Communications should now be enclosed and fan-ventilated flameproof types, addressed to the company’s head office at 12, DC shunt, series, compound and split field of Henrietta Street, Strand, London, W.C.2. 94 E l e c t r ic a l R e v ie w July 20, 1945

S. 6-6kV-0-10sq.in. Overhead Line s. H h / 0-7 Charts—III X x >6 s N / /O-iiS For 6-6-kV Lines s X X A s -C •9 X X \ VV 0-95 By J. S. Forrest, m .a ., b .s c., F.imt.p. 01 5 - > k ul X < \ _1 X - < V x kO-98 i ><; - - - S . \ \ A X > O V, \ \ \ M W - M IL E S 2 \ XX n o s 15 \ 20 25 \ \ X \ \ \ X X; S \ \ \ \ \ \ \ \ \ V \ Y X V0-‘sa . \ \\ V - S 1 \ N\- ■ X s \ S \ h 6 e f e l t ¡4 16 18 20 VOLTAGE DROP-PER CENT ( ^ Fig. 8. —(U se also for 3-3-kV) power factor of 0-95 lagging, while the peak load is 2,000 kW at 0-8 lagging. What voltage range is required at the sending end to maintain 6 -6 kV at the receiving end ? / The transmitted load is 5 MW-miles at 0-95 lagging power factor under light load conditions. The 6-6 kV chart for 0-20 sq. in. conductors (Fig. 9) shows that the line Fig. 7.—(U se also for 3'3-kV) voltage drop will be 4-5 per cent. Similarly, under peak load conditions, the load is Exam ple 2 10 MW-miles at 0-8 lagging power factor, .4 6-6-kV feeder is 5 miles long, and the and the corresponding voltage drop is seen line conductors have a cross-sectional area to be 14 per cent. The range of sending- o f 0-20 sq. in. Under light load conditions, end voltage required is therefore 6-9 kV the feeder supplies a load o f 1,000 k W at a to 7-5 kV.

1 1 6-6 k V - 0 * 2 0 sq. in.RF O " X AD-7 < 0-3 X / X / o-05 x • s .0 ■9 x > > X 7/ >! 0-95 '' f -X X X ■ - > in ' X, Xj k -o- 9 - 'x UJ - •X / X N ■ ' < x, X X s X -X C' N s \ X |r N s X MW-MILES “-4 S, ■v. X k X , X X < sj, 10 - M5 s 20 X 5 X 3ov 35 40 4 > 5- ■-x. x X X k X 2 x X X \ s x • ' \ X ¡X X X ■- X X s X S' x X , X X X X X X ■. X X x X <- X X X k X X X X ' ' s x \ X X \ ~c X s S fl X s \ X X X ' -J XX \ \ - X X . \ o X X s X \ \ < \ X - \ x X K UJ X s X \ \ N \ k X S

Fig. 9. — (Use also for 3-3-kV) July 20, 1945 E l e c t r ic a l R e v ie w 95 $ Transmission-line Proieetion High-speed Protection Using Superimposed Carrier Signalling

j^OR the protection By D. H. Towns and H. McDonald signal to be trans­ of long overhead mitted and prevents transmissionf lines a pilol^ess system is tripping at the remote end. If the fault is generally preferable for reasons of economy. internal (fig. lb) the power flows into the It is desirable that it should be rapid in action section at both ends and causes both direc­ and of the unit type and high-speed carrier- tional relays to operate, thus interrupting the current protection satisfies these require­ carrier signal and causing tripping. ments. Carrier protection was used in Great Although the stabilising and tripping Britain on a section of the 132-kV grid in sequences are controlled by the directional 1931, and was probably the first example of relays, they are initiated by two separate non- its kind in the world. It was not o f the high­ directional relays. By setting the stage-one speed class, but with the development of relay (which initiates stabilising) lower than high-speed directional relays, concurrent with the stage-two relay (which initiates tripping) the speeding up of a circuit-breaker operation, the sensitivity of protection for stabilising is several forms of high-speed equipment are made slightly greater than that for tripping, in service on high-voltage overhead trans- thus ensuring that any fault current sufficient mission-lines, ensuring rapid and selective to cause tripping is also large enough to clearing of faults over the whole feeder stabilise. The overall tripping time with length. internal faults for a fault current exceeding The carrier signal, at a frequency between approximately five times the setting is three 50 and 200 kc/s, may be used either to ensure cycles, at 50 c/s frequency, and the stabilising stability following an time is one cycle or external fault, or less, so that there is an adequate margin of cause tripping with p F f ] A Bi r t | an internal fault ; but, XX PROTECTED • x x 1 safety for the trans­ since the latter may 11 11 FEEDER 'in. mission of the stabilis­ — ► 1_____ 1 sever the line or * L — J l l r ing signal. “ short ” the phase or — The components phases over which the required at each feeder (*) high-frequency trans­ end (fig. 2) comprise mission takes place, (1) three phase-fault the second alternative nl----1 relays and one earth- arrangement is seldom r f f ] A ¡ r “r ! fault relay, each having 1 X X PROTECTED XX a directional element, adopted. 1 J L 1 FEEDER 1J 1 1 a stage-one non-direc- In the modern system i_____ 1 1_____ 1 — to be described the sig­ ~ d r tional element, a stage- nal is used to stabilise T two non-directional protection on sound (b) element and a flag sections of the net­ indicator; one trip- work under fault con­ Fig. I.— Diagram representing operating prin­ ping-relay having a ciple, showing external and internal fault ditions, the presence sequences time-lag element and and direction o f the (a) W ith external fault; directional relay at A operates two high-speed trip­ without directional relay at B operating, so stabilising ping elements. (2) fault current having signal is transmitted from B to A, tripping thus been first detected by prevented at A. (b) W ith internal fault: directional Three line-current relays at A and B operate, interrupting stabilising transformers. (3) high-speed non-direc- ■ signal; tripping thus initiated at A and B. tional and directional* Three capacitati ve vol t- relays at each end of each network section. age transformers, two having high-frequency With an external fault (fig. la) the direction injection and filter equipment. (4) One of power flow is into the sound section at one carrier cabinet, two tuned choke coils, and end and out of it at the other. The directional two line coupling filters (mounted in the relay at the end remote from the fault operates capacitative voltage transformers). (5) One to trip whereas that at the end near to the rectifier and charger with 250-V and 50-V fault does not operate, but allows a stabilising batteries. 96 E l e c t r ic a l R e v ie w July 20, 1945

Relays.—The fault-detecting relays are con­ opposite direction, the flux in the restraining nected in ordinary over-current and earth-fault magnet is increased and that in the operating arrangement (fig. 3a) the directional element magnet is decreased so that the element is of each being of the balanced-beam type. The restrained still more. Under normal-load phase-fault directional element (fig. 4) has conditions with current flowing in the direc­ polarising and restraining voltage windings tion for operation, the flux in the restraining and an operating current winding. The fluxes magnet is greater than that in the operating of the two voltage windings assist in the magnet and the telay does not operate. restraining magnet and oppose in the The polarising voltage winding is 90 deg.- operating magnet, so that when there is no connected (fig. 4b), and the restraining voltage operating current the beam of the element is winding is 30 deg.-connected; that is, the restrained. element for R-B faults, which is energised by . When current flows in the direction for the R-phase current, is polarised by the W-B operation the flux of the current winding is volts and restrained by the B -R volts. added to that of the polarising voltage Consequently, with an R-B phase fault the polarising voltage is little affected by dis­ tortion o f the voltage vectors, whereas the restraining voltage collapses. The phase angle of the flux of the polarising winding is adjusted by means of a series condenser and a resistor to lead the polarising voltage by 30 deg. Maximum torque occurs when this flux is in phase with the current-wind­ ing flux; that is, when the current lags behind its associated star voltage by 60 deg. The current in the restraining voltage winding is adjusted by means o f a series reactor and resistor, so that its flux is in phase with the polaris­ ing voltage flux. The earth-fault directional element operates on the same general principles as the phase-fault direc­ tional element. It has, however, only two winding in the operating magnet and sub­ windings, one energised from the residual tracted from that of the polarising voltage circuit of the three line-current transformers winding on the restraining magnet (fig. 4a). and the other from current transformers on If the magnitude and direction of the current the solidly-earthed neutrals of power trans­ are such that the resultant of the three fluxes formers. The fluxes add in one magnet and in the operating magnet is greater than that subtract in the other, and consequently the of the three fluxes in the restraining magnet, relative polarities of the currents in the two the element operates. If the current is in the windings determine the magnet in which the July 20, 1945 E l e c t r ic a l R e v ie w 97 larger flux is set up; that is, determine very high speeds. The stage-one element has operation or restraint of the relay element. one pair of contacts, which initiate the A saturable auto-transformer is connected in stabilising signal. The stage-two element has

series with each winding, in order that one pair of tripping contacts, one pair of appreciable differences may still be main­ stabilising contacts (in parallel with the con­ tained between the torques exerted by the tacts of the stage-one element) and one pair two magnets if one current is much larger of contacts for the purpose of operating a than the other. flag indicator. When no neutral is available for operating The tripping relay comprises a DC electro­ the polarising winding of the earth-fault magnetic time-lag element energised by con­ directional relay, a voltage coil is fitted for tacts in the phase-fault and earth-fault relays, operating from the broken-delta winding of if the carrier receiving and lock-out relay has the voltage transformers. In other respects not operated, together with two high-speed the construction of the relay is as described. tripping elements. It takes about 0 03 sec. to The two non-directional elements in each operate so there is time for the stabilising relay have rotating armatures and operate at carrier signal to be received before tripping 98 E l e c t r ic a l R e v ie w July 20, 1945 can take place. When the time-lag element components, the latter being accommodated does operate it energises the high-speed with the voltage transformer in a weather­ tripping elements, which open the circuit- proof welded steel box underneath the con­ breaker, seal themselves in and energise the denser stack ; the whole assembly is mounted appropriate flag indicators in the phase-fault on a steel framework. The voltage trans­ relays. former has two 63-5-V secondary windings, Current Transformers.—The current one for operating the phase-fault direc­ coils of the fault-detecting relays are energised tional relays and the other for connecting from current transformers in the circuit- in broken delta to the earth-fault relay when breaker controlling the protected feeder and residual-voltage polarising of the latter is in the solidly-earthed neutrals of one or more used. The condenser stacks of two phases are also used for injecting the high- frequency signal into the line, the carrier system being o f the interphase type, which has proved to be less susceptible to interference due to lightning surges, switching operations, and so forth, than is a line-to-earth system. The boxes housing the voltage trans­ formers and their associated tuning apparatus for these two phases also RESTRAINING OPERATING MAGNET MAGNET contain the high-frequency injection

(b) ' ’

V p —polarising voltage ; V r — restraining voltage ; 0 L —flux due to current; 0—resultant flux 0p —flux due to polarising voltage ; 0r —flux in operating magnet; 0R —resultant flux in due to restraining voltage. restraining magnet. Fig. 4.—Principle of phase-fault directional element power transformers. The transformer transformers and their associated tuning characteristics required depend on the and filter components. In addition each maximum fault current that may occur in o f the three boxes contains a protective the protected feeder and also on the relay spark gap and an earthing switch, which settings, since the latter affect the burden eliminates risk of shock by automatically imposed on the transformers by the relays. earthing the bottom end of the main con­ The characteristics should be such that with denser stack when the door giving access to the desired relay settings the current trans­ the voltage transformer and high-frequency formers do not saturate up to the maximum equipment is removed. If suitable voltage fault current. transformers already exist, the voltage for the Voltage Transformers.—The voltage for protection relays may be taken from them the directional relays is normally obtained and the condenser stacks can then be used from three capacitative transformers, each solely tor injecting the h.f. carrier signal into consisting of a condenser stack containing the line, only two stacks being required. oil-filled plate condensers together with a High-frequency Equipment.— The carrier step-down transformer and 50-cycle tuning set comprises a voltage regulator panel, July 20, 1945 E l e c t r ic a l R e v ie w 9 9 transmitter panel, meter panel, receiver panel, contact on one of the high-speed tripping telephone panel, filter-and-attenuator panel, elements. The high-speed elements of the high-frequency termination and balance panel tripping relay are also provided with contacts and a terminal panel, all mounted in a to give local and/ ventilated metal cabinet (fig. 6). The receiver or remote alarms. is permanently connected to ihe line, so that The carrier set is it is always ready to accept signals and the provided with transmission is initiated by the fault-detecting alarm relays, relays as already described. energised by the The object of the choke coils mounted on anode current of „ two o f the condenser stacks (fig. 7), is to each valve, with confine the high-frequency signals to the indicating lamps. protected section and so to prevent loss of Test links and signal strength in adjacent sections. They are therefore tuned with a parallel condenser Fig. 6. — T y p i c a I cabinet containing to form a rejector circuit at carrier frequency, carrier transmitter, but have negligible impedance at the power receiver and tele­ phone equipment frequency. Each coil is fitted with a protec­ tive spark gap. The carrier sets and their terminals are pro­ associated high-frequency equipment are vided for checking tuned to different all currents and frequencies in voltages ; the different line sec­ equipment can tions to avoid also be com­ interference be­ pletely isolated tween adjacent for checking its equipments. operation by The power for means of second­ the carrier set is ary injection. obtained from The carrier-set is provided with metering suitable rectifiers facilities for each individual valve, so that connected to the routine checks may easily be made. A A C mains. In test key also enables a signal to be sent addition, 250-V from either end so that the strength received and 50-V batteries at the other end can be measured, but the normally float on signal is automatically interrupted if a the output circuits fault occurs in the protected feeder during of the rectifier and its transmission, so that routine testing does receive a small not interfere with protection. trickle charge. Simplex Telephony.—If required, the Fig. 5. — Typical high-frequency equipment can provide for assembly of relays telephony over the normal protection channels on self - contained cubicle by modulation of the carrier current with voice frequencies, transmission then being They are large at a lower level than for protection, so that enough to main­ the latter can operate at any time, whether tain the protection or not the telephone is in use. Since approxi­ for 24 hours. mately the same carrier frequency is used in Indications and both directions, the telephony is necessarily Alarms. — Each simplex (the two ends cannot transmit speech o f the phase-fault simultaneously). The addition of telephony and earth-fault is of considerable assistance when testing, relays is provided particularly where communication facilities with a flag indi­ between substations are poor or non-existent. cator, energised Conclusion.—The application of high-fre­ through a contact quency carrier-current protection is at present on the stage-two confined to overhead transmission networks. element and’ a It seems likely that this limitation will continue, 100 E l e c t r ic a l R e v ie w July 20, 1945 make it unusable. The per­ formance of the apparatus put into service during the last few years on lines wholly overhead indicates that the protection has not only the same high reliability and efficiency as other well- established pilotless protective systems, but also the advantages of a shorter operating time and of not requiring co-ordination with the settings o f adjacent protection. In consequence, it is prob­ able that the use o f the system on long overhead lines will extend considerably, more particularly because, in associa­ tion with high-speed circuit- breakers, it provides a means o f guarding against system instability under fault con­ ditions. The authors thank A. Reyrolle Fig. 7.—Typical group of capacitative voltage transformers, & Co., Ltd., and the General showing coupling condensers and high-frequency tuned choke Electric Co., Ltd., for per- coils for superimposed carrier protection at a 132-kV grid ... , , i„ j H K switching station mission to publish the detailed information contained in this since the attenuation ofa high-frequency article, and the Central Electricity Board for signal is so great in cable networks as to permission to reproduce photographs. The British Council N aspect of the work of the British London, E., during the first half of this Council (this month celebrating its tenth month. Four lectures were given by Professor Aanniversary) that is of immediate utility is in W. J. John, Dr. A. Tropper, Messrs. J. M. furthering knowledge abroad of the con­ Hawkins and C. T. W. Sutton on subjects tributions of this country to science and ranging from elementary travelling-wave engineering. The Science Committee (chair­ theory to the compression cable. Students man, Sir Elarry Dale) and its engineering, will also work in the well equipped high- panel (chairman, Sir William Larke, and voltage laboratory, which has been described secretary, Professor S. J. Davies), in addition in the Electrical Review, and visit electrical to translating into many foreign languages engineering works in the London area. accounts of researches and technical achieve­ ments here, has given advice to overseas countries developing systems of engineering Purchase Rights training so that these may be carried out T has already been reported that the London with British equipment, textbooks and and Home Counties J.E.A . had arranged periodicals. Great weight is attached to tmeetings of local authorities in its area which providing facilities for personal contacts own purchase rights in connection with com­ pany-owned electricity supply undertakings. with scientists of the allied nations, including The Authority’s General Purposes Committee exchange visits. Scholarships have been reports that such meetings have been held in awarded to students from abroad to enable the areas of the Slough & Datchet and them to study British methods at first hand, Windsor companies; the Uxbridge & District in which connection no opportunity has been Electric Supply C o .; part of the area of the lost of emphasing the high standards Northmet Power Co.; the Brentford and (part) attained by our universities and institutions. Metropolitan Companies; and the Egham & Staines and (part) Woking Companies. An example of the arrangements for Discussions are being continued in each case students is the summer course in electrical and the Committee proposes to report fully engineering, which was held at the high- to a later meeting of the Joint Electricity voltage laboratory of Queen Mary College, Authority. July 20, 1945 E l e c t r ic a l R e v ie w 101 ELECTRICITY SUPPLY Appliance Earthing at Douglas. Hereford’s Altered Decision Bradford. — H ig h e r C h a r g e s . — Revised two women members who were of the opinion charges recommended by the Electricity Com­ that electricity would be the better form of mittee are estimated to produce an additional heating. Mr. C. G. Marchant, chairman of revenue of £16,000 per annum. It is proposed the Gas Committee, spoke in support of the to increase by 5 per cent, (making 25 per cent, use of gas, while Mrs. Bentley-Taylor was above the charges at July 1st, 1938) those rates strongly in favour of electricity. Eventually an which are not subject to a coal-price adjustment, amendment by the Gas Committee chairman except domestic and industrial lighting and substituting gas for electricity was carried by lighting in churches, theatres, cinemas, etc. fifteen votes to four. Brighton.—G a s-E l e c t r ic it y C h o ic e . — By Lichfield.—S u p p l y t o E st a t e s .—The Elec­ a decision of the Town Council confirming a tricity Committee is to provide a supply to recommendation of the Health and Housing housing estates at a cost of £19,115. Committee, where gas only is available it is to be supplied to factory-made temporary Marlow (Bucks).—E l e c t r ic it y C h o s e n .— houses, and correspondingly with electricity. When draft plans for 26 houses in blocks of If, however, both services are available elec­ six, four and two were presented to the Urban tricity is to be used. District Council the chairman of the Housing Committee said it was considered more econ­ Chesterfield.—D istribution W o r k . — The omical to use electricity for all purposes. Electricity Committee is to provide a supply Councillor L . J. Smith thought that the houses to Arnold Laver & Co., Ltd., at West Bars at a should have gas as well, but Councillor Whitfield cost of £377 and improve the supply to Joseph contended that when people got used to cooking Clayton & Sons, Ltd. (£1,604) and in the by electricity they did not want to change; Highfield area (£3,242). electricity was cleaner than gas. The Com­ Clitheroe.—O v e r h e a d L in e s .—The proposed mittee’s recommendation in favour of electricity erection of overhead lines at Bolton-by-Bowland was approved. by Clitheroe Corporation was considered Middlesbrough.—C o a l a n d E l e c t r ic it y recently by the North-East Lancashire Joint C h a r g e s .—In a report to the Town Council, Planning Committee, which discussed the the borough electrical engineer stated that since question of whether the rural beauty of the 1937 coal charges to the electricity undertaking district would be marred. The Committee had risen by £25,000, while electricity consumers confirmed a recommendation of its technical were not paying a penny more. This one-sided sub-committee that the permission of the arrangement could not go on for ever. Minister of Town and Country Planning must be sought before any overhead service lines Northern Ireland.—I n q u ir y in t o B o a r d ’s were installed anywhere in its area. Mr. G. P r o p o s a l s .—The inquiry into the application Hetherington, town clerk of Clitheroe, said that of the Electricity Board for Northern Ireland an important consideration was the extension for confirmation of its No. 8 Development of electricity to farms. Scheme was continued in Belfast last week. Clyde Valley.—E l e c t r ic it y in N e w H o u s in g Mr. Thomas Christie, B.Sc., chief engineer to Sc h em e s.— In the area served by the Clyde the Board, said there was no reason why the Valley Electrical Power Co., of more than 5,000 Board should not go ahead with the develop­ houses already passed for erection, over 3,000 ment at once from an engineering point of will be of the “ all-electric ” type. view. Statements referring to the alleged in­ adequacy of supplies of electricity provided by Douglas (Isle of Man). — E a r t h in g o f the Portglenone undertaking and supporting A p p a r a t u s .—The Electricity Committee is to the Board’s application were entered on behalf resume the work of earthing apparatus on of the Portglenone Manufacturing Co. and other consumers’ premises which was commenced in local commercial concerns. 1938 but abandoned in consequence of the war. Mr. R. P. Beddow, secretary of the British The borough electrical engineer estimates the Electric Traction Co., gave evidence on behalf cost at £3,300. of the Antrim Electricity Supply Co. and the R e s u l t o f Y e a r ’s W o r k in g .— The Com­ Antrim Electricity Distribution Co. He said mittee reports a surplus for the year of £15,851. that the companies had provided the requisite Dundee. — R e v ise d C h a r g e s . — The Town supplies, including those required for war Council on June 28th agreed to increase electricity purposes, and they had been congratulated by charges to certain consumers. The principal the Ministry of Aircraft Production. In his change is for lighting in which the charge goes opinion Scheme No. 8 was not a development up from 2Jd. to 3|d. per kWh. scheme at all, but a very unfair means of taking powers to acquire his companies’ undertakings. Hereford.—D e c is io n a g a in R e v e r s e d . — A He drew attention to the absence of any pro­ recommendation of the Housing Committee vision for the compensation of the companies’ that electric cookers, refrigerators and wash staffs. In reply to Mr. Wynn Parry, K.C. (for boilers should be installed in 100 prefabricated the Board) he said that the British Electric houses was the subject of a debate at the last Traction Co. had put £80,000 into the Antrim meeting of the City Council. Mr. A. R. Clayton, Electricity Supply Co. for which interest at 7 who asked why the Committee had reversed per cent, had been paid. its decision by now recommending the installa­ tion of electricity instead of gas, was told by Rotherham.— P o w e r C h a r g e s .—The Elec­ Dr. J. V. Shaw that it had been influenced by its tricity Committee is applying for authority to 102 E l e c t r ic a l R e v ie w July 20, 1945 adjust the price of electricity to cover the cost Application is being made for consent to defray of fuel to power consumers not at present £30,000 of the total cost xrnt of unallocated subject to a coal clause. profits, the remainder to be met by loan. St. Marylebone.—S t a n d a r d K it c h e n U n it s . Stirling. — C h a n g e -O v e r . — Application is —Housing Committee has appointed a sub­ being made to the Electricity Commissioners committee to make arrangements for stand for permission to change over the electricity ardised kitchen units, etc., in order to prevent supply system from DC to AC. any delay in the schemes for the erection of flats at the Barrow Hill and Church Street estates. S w indon.— P u r c h a s e o f P l a n t .—The Elec­ tricity Committee has decided to purchase plant St. Paneras.—S w it c h g e a r f o r S u b s t a t io n s . —The Council’s five-year programme included and equipment from the Ministry of Supply for the replacement of certain substation plant, and £8,000. The plant was installed by the Ministry it is now proposed to obtain prices for such at the G.W .R. works. alterations from the makers of the original Wells (Norfolk).— S t r e e t L ig h t in g C h a n g e . equipment, the total estimated cost being —The Urban District Council has accepted an £43,916. It is also proposed to obtain prices estimate of the East Anglian Electric Supply for high- and low-voltage switchgear for three Co., Ltd., for street lighting. Before the war new substations (estimated cost £13,755). gas was used for lighting. Area Extension Inquiry Opposition to Derby and Notts Company’s Application

N inquiry was held at Chesterfield on July general inadequacy of the service. The power - 10th and 11th into an application by the company had now completed the purchase ADerbyshire and Nottinghamshire Power Co. toof those non-statutory companies and, if that become the authorised suppliers for an area of Order were granted, it would introduce a some 70 square miles in North Derbyshire. standard service. The company’s application for a North Derby­ Mr. C. R. King, general manager the shire Electricity (Extension) Special Order to power company, said that when the company cover this district was opposed by the Chester­ took over the non-statutory companies it field and Mansfield Borough Councils, Bolsover applied its own lower tariff’s. The company and Staveley Urban District Councils and estimated that it would sell 2 } million kWh in Chesterfield R.D.C. They put forward an the proposed added area in the first year rising alternative scheme under which the area in to 3,400,000 in the third year. Capital dispute could be covered by an extension of expenditure over the three years was put at the existing municipal undertakings of Chester­ £207,500. It expected to make a small margin field and Mansfield. It was also stated that an of profit the first year. amalgamation of the Chesterfield and Bolsover Aid. H. Varley, chairman of the Chesterfield undertakings was being negotiated in connection Electricity Committee, said the Chesterfield with the municipal scheme. The inquiry was undertaking was well equipped for develop­ conducted by Mr. H. Nimmo, Electricity ment. The local authorities were all very Commissioner. Mr. Craig Henderson, K.C., perturbed about the application and set up a represented the power company and Mr. Consultative Committee. A consulting engineer E. J. C. Neep the municipal authorities. was called in to evolve a counter scheme under which the area in dispute could be supplied by No Authorised Supply Chesterfield on the westerly side and Mansfield Mr. Craig Henderson explained that the area on the easterly side. They intended to apply concerned was the only part of Nottinghamshire at once for Special Orders to extend their service and Derbyshire for which there was no areas to cover the district. Chesterfield Cor­ authorised supply. The Derby and Notts poration and the other local authorities were Co. supplied all the remainder of the two out for municipal ownership of the electricity counties with the exception of the urban areas distribution system. administered by municipal undertakings. The Councillor H. Needham (Bolsover U.D.C.), company’s majns were in and could quickly Mrs. D. M. Sutton (Staveley U.D.C.), Mr. Sam be extended to meet domestic needs and the Sales (Chesterfield R.D.C.) and Alderman J. A. demands of forthcoming housing development. Beck (Mansfield) all gave evidence in favour of the It was already supplying a substantial part of counter scheme. Mr. R. W. Mountain, con­ North Derbyshire under a 1932 Extension sulting engineer to the local authorities’ Con­ Order. Many applications had been received sultative Committee, gave details of the counter for the company to supply premises within the proposals. area which was the subject of the inquiry. Mr. Neep said that the power company had Between 1932 and 1935 Fringe Orders had been jumped in quickly to “ scotch ” in that area obtained to supply some 1,092 premises including for all time any question of competition from a housing estate of Chesterfield R.D.C. at local authorities. Gleadless. In the urban district of Staveley Mr. Craig Henderson claimed that the and adjoining parishes there were eight nqn- Chesterfield and Mansfield schemes merely statutory companies giving supplies, obtaining existed on paper. They were based on the electricity in bulk from the Staveley Coal & power company’s scheme and it was frankly Iron Co. Complaints had been received about admitted that the scheme depended on using the frequency (30 cycles), the price and the the power company’s mains and bulk supply. July 20, 1945 E l e c t r ic a l R ev ie w 103 Ignition 1'ester Examination of Running Engines

■^ A U L T S in the sparking plugs or cables, energised either from 220-V AC mains, or from * distributor, magneto, coil, or battery a 6 to 24-V accumulator, as desired. It can be forming part of the ignition system of an used on a vehicle or aircraft while in motion internal combustion engine may easily be and can be easily adapted as a switchboard diagnosed pictorialty by means of a cathode- instrument for the routine supervision of a ray oscillograph. The instrument, as made by group of engines, as in a multi-engincd aircraft, the English Electric Co., Ltd., is described by or boat, or in an engine test house. Mr. F. R. F. Ramsay (chief ignition engineer, The instrument owes its inception to an D. Napier & Son, British patent 563,502) as approach to the Ignition Department of D. providing a series of peaked figures on a single Napier & Son, manufacturers of the “ Sabre ” screen, one for each sparking plug arranged in engine, by the Department of Tank Design the firing order of the engine cylinders. The shapes are suggestive of particular faults. For instance, an excessively large spark gap forms a high-peak figure while a short-circuited gap forms a low-peak figure. A misfire causes the figure to flicker and a weak rocker, which causes the contacts to bounce above a certain speed, makes the row of figures dance on the screen as the engine is speeded up in a way that suggests the cause of the trouble. A valuable feature of the instrument is that direct access to the engine is not necessary. The electrical pulses which actuate the cathode-ray tube are obtained from the Iow-voltage side of the magneto, or coil, instead of from the secondary side which supplies the sparks. The primary and secondary windings of any magneto, or coil, constitute a “ Tropical ised ” cathode-ray ignition tester for the Services transformer whose primary is open- circuited when the primary contact breaker opens during the war for something which would to form the spark on the secondary side so that locate faulty plugs on tank engines without any alteration in the secondary load (sparking the long delay attending the removal of each plug) will alter the wave-form of the primary plug from its usually inaccessible and com­ voltage peak shown on a cathode-ray screen, pletely screened position. thus enabling the nature of the secondary load and its condition to be inferred. The instrument can be connected to the magneto switch or, Electricity in Victoria in the case of battery ignition, to the low-voltage HE following figures have been issued by terminal of the coil; or, since the connection T the State Electricity Commission of Victoria does not affect the ignition, a permanent socket for the year 1943-44 : Electricity generated, can be provided for it on the instrument panel 1,477-7 million kWh. Electricity sales, 1,201-3 of a motor vehicle. million kWh. Number of consumers (excluding The “ fixing ” of the row of figures in firing bulk sales), 300,465. Average price per kWh order is attained by triggering the cathode-ray sold : domestic, 1 -822d. ; industrial, 0-812d. ; with a tiny fraction of the voltage tapped from commercial, 1 -835d. Number of farms served, 7,467. Number of motors connected, 59,483 one of the plugs. The ray then traverses the (365,746 HP). screen once for every two revolutions of the Although the restrictions on the buying, engine. The trigger connection does not affect selling and hiring of heating and cooking the spark at the plug; consequently it can be appliances have been lifted for some time, made permanently or otherwise. An attenuator essential materials for their manufacture are dial, which consists of a stepped resistance, still either strictly controlled or in very short shunts the primary current in increasing amounts supply, so that the position so far as- the con­ sumer is concerned is little altered. Electrical as the dial is operated and enables the. viewer fittings of some kinds are now gradually coming to see which plugs are likely to misfire. on to the retail market, but many items are still A fully “ tropicalised ” instrument for the difficult to secure. Strangely enough, it always Services is of about the same dimensions as a seems that the lines mostly needed are those portable typewriter, and is arranged to be which are last to make their appearance. 1 0 4 E l e c t r ic a l R e v ie w July 20, 1945 FINANCIAL SECTION Company News. Stock Exchange Activities. ordnance. Many hundreds of tons of bronze Reports and Dividends wire and strand have been supplied for sea- The General Electric Co., Ltd., in its report mining operations, and several more hundred for 1944-45 to be presented at the annual tons of tinned copper wire for the buoyant meeting on July 26th, announces a profit on cables developed for disposing of magnetic trading and income from investments (including mines. The length of wire produced for these receipts from subsidiaries) of £1,880,697, as two purposes alone was approximately a hundred compared with £1,812,409 for 1943-44. The thousand miles. net profit, after meeting depreciation, directors’ Revo Electric Co., Ltd.—At the genera] fees and pension fund contribution, is £1,303,919 meeting of the company on Wednesday the (£1,240,730). Adding the £865,134 brought chairman stated that the increased profits were forward the total available is £2,168,253. due to increased production. Reserves now Provision for income tax is again £700,000 and totalled £285,000. During the war new plant after meeting the preference dividends and the costing £250,000 had been installed and new ordinary dividend (10 per cent, plus 7i per cent, buildings amounted in area to approximately bonus) a balance of £964,270 is carried forward. 30,000 sq. ft., plans being in hand for the erection The Enfield Rolling Mills, Ltd., show a profit of a further 36,000 sq. ft. of buildings. Vast for 1944 of £102,875, including tax refund. quantities of war equipment had been produced This compares with £113,921 for 1943. De­ and a prominent part had been taken in the preciation takes £39,152 (£45,055), interest development of fluorescent tubular lighting. £4,385 (£3,773), debenture interest £7,896 Cookers were already being manufactured for (£8,040), fees, war damage, etc., £8,671 the Government’s emergency housing schemes (£13,619), obsolescence £1,872 (£10,260) and and to meet current rehabilitation problems. taxation £28,500 (£8,000). The dividend is New designs would be made available as quickly maintained at 5 per cent, and £121,457 as possible, and other new products would (£123,058) is carried forward. include a house service unit, and street lighting In a statement circulated with the report the and industrial equipment. chairman, the Earl of Verulam, says that the Ward & Goldstone, Ltd., report a net profit of company’s sheet and strip mill has been one of £38,939 for the year ended March 31st last, as the largest non-Government producers of brass compared with £28,330. A final dividend of strip for small arms ammunition, the output 10 per cent, (same) is to be paid with an addi­ amounting to 22,000 tons. In addition tional 5 per cent, bonus, making 25 per cent. 35,500,000 brass blanks for 20 mm. cannon (20 per cent.). The carry-forward is increased shells and 2,000,000 blanks for 2-pdr. anti-tank from £46,194 to £55,542. In a statement shells have been produced. They have also accompanying the report the chairman, Mr. manufactured 9,500,000 copper driving bands. A. A. Goldstone, says that no account has been Throughout the war they have been engaged on taken of the sum likely to be allowable for tax copper alloys and have patented several other refund but the total is substantial. alloys for special purposes. Their zinc mill has been required to produce large quantities of Franco Signs, Ltd.— Mr. J. F. Mallabar, battery zinc. The company is now operating chairman, stated at the annual general meeting three secondary aluminium refineries. that a staff pension scheme had been instituted Thomas Bolton & Sons, Ltd.—An increase during the year. The general reserve now in the trading profit from £288,398 to £298,568 stood at £85,000. During the war the company is reported in the accounts for the year ended had turned over its production to making parts March 31st last. After providing for deprecia­ of Mosquitoes, torpedo tubes, P.l.A.T. gun tion £60,000 (£70,000), directors’ fees £3,750 mountings, mortar and other bombs, floats for (same) and debenture interest. £17,435 (same) Sunderland aircraft, and general stores, including there remains a net profit of £217,383 (£197,016). medical glassware. One factory, since rebuilt, Income tax takes £138,152 (£131,072), general was severely damaged by bombs and work at reserve £ 10,000 (£20,000) and contingencies others was badly hampered, yet a labour force reserve £30,000 (£10,000). A final dividend of which at its peak exceeded 3,000 employees 5 per cent, with a cash bonus of 2$ per cent, continued to work steadily. again makes the total distribution 10 per cent, Electrical Finance & Securities, Ltd.—Mr. and £75,603 (£68,872) is carried forward. H. C. Drayton, chairman, stated at the annual Referring to changes in the directorate, which general meeting that consumers supplied by have taken place since last year, a statement their companies at the end of December last by the chairman, Mr. P. V. Hunter, announces numbered 66,661, as compared with 62,903 at the appointment of Mr. T. J. Tait, secretary It.?, 1939. The connected load was to the company until his retirement from that 207,391 kW (177,374 kW), and sales of elec­ position in March. Mr. J. A. Foulds succeeds tricity amounted to 113J million kWh (66J him as secretary. With regard to the company s ^he revenue had increased from activities during the war, the chairman mentions £461,000 to £753,000, the average price paid by special alloys for aircraft and aero engines. consumers falling from 1 -66d. to 1 59d. per kWh. About 50 million machined components, many , . regard to proposals that electrical energy to extremely fine limits of dimensions, have should be sold on the “ postalisation ” principle, been supplied, together with nearly 60 million Mr. Drayton said that the telephone service copper and cupro-nickel shell bands for 2-pdr. had not been dealt with in this way although quick-firing guns up to the largest calibre naval the principle was the same and the necessary July 20, 1945 E l e c t r ic a l R e v ie w CONTROL=

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The Iso-Speedic Company Ltd., Coventry. Telephone : Coventry 3147 Telegrams : Isospeedic, Coventry July 20, 1945 E l e c t r ic a l R e v ie w 105 basic condition was there, namely, State Ultra Electric (Holdings), Ltd., state that monopoly. Of course, there was the chance the net balance for 1944-45 was £12,893 (against that it could not be done without the State £10,587). The dividend remains unchanged having to make up the deficiency or a much at 10 per cent. The holding in the operating higher rate being paid by industry and business. company, Ultra Electric, Ltd., (at cost) has risen Electrical Switchgear & Associated Manu­ from £198,998 to £263,998. That company’s facturers, Ltd.— Dividends, etc., received in trading profit was £53,050 (against £64,140 for respect of the year ended March 31st last the preceding eleven months), it is hoped to totalled £35,675 (against £35,584) and the net have “ Ultra ” products on the market again profit was £17,878 (against £16,820). The before the end of this year. ordinary dividend is maintained at 20 per cent, E. K. Cole, Ltd., have declared an interim and £16,435 (£15,182) is carried forward. dividend of 8 per cent. (same). The Folkestone Electricity Supply Co., Ltd., a The Mirrlees Watson Co., Ltd., is again paying subsidiary of the County of London Electric a dividend of 8 per cent. Supply Co., Ltd., reports a revenue for 1944 amounting to £141,245 (£115,402). Charges The Tellus Super Vacuum Cleaner Co., Ltd., and fees absorb £89,318 (£75,256), depreciation, reports a net profit of £241 for 1944, as compared etc., £25,000 (£23,500), taxation £20,000 with £225 in the previous year. This reduces (£29,000), contingencies £3,000 (£2,000) and the debit balance to £17,007. preference dividend for the two years to Sep­ The Telegraph Construction & Maintenance tember 30th, 1944, £2,500 (same), leaving Co., Ltd., is maintaining its interim dividend at £9,205 (£7,778) to be carried forward. 5 per cent. The Delhi Electric Supply & Traction Co., Ltd., is again to pay a final dividend of 5 per cent., New Companies lax free, making 9 per cent., tax free (same). Johnson British Electric, Ltd.—Private com­ The company’s Delhi agent has visited London pany. Registered July 3rd. Capital, £12,000. for discussions on the Provincial Government’s Objects: To carry on the business of manu­ proposal to purchase the company’s under­ facturers of, and dealers in electrical and radio taking. Upon his return he will take up a goods, fittings and equipment, etc. Directors: number of important points with the Delhi A. E. Johnson, Bron Wylfa, St. Asaph, North authorities. The directors state that they Wales; and L. G. Johnson, 43, Essex Road, find it impossible to estimate what the agreed E.4. Registered office; 446, Salisbury House, fair market valuation will be. The company E.C.2. has an issued capital of £200,000. Philectric Installations, Ltd.—Private com­ J. Stone & Co., Ltd.— Giving details of the pany. Registered July 6th. Capital, £2,000. company’s war effort at the annual general Objects: To carry on the business of electrical meeting on July 10th, Mr. Kenneth Preston, installation and illuminating engineers, etc. the chairman, said that over 300,000 automatic Directors: I. McG. Phillips, Sheephill Farm, voltage and current regulators were supplied to Stoke d’Abernon, Cobham,* Surrey, and two the M.A.P. alone. They had been supplied for others. Registered office: 276, Hook Road, aircraft, tanks, naval vessels and new develop­ Surbiton. ments such as beam location. All their light alloy foundries had been working at high G. Bernard Pountney & Knight, Ltd.—Private pressure and castings had been supplied for the company. Registered July 6th. Capital, £2,000. Bristol Hercules, Rolls-Royce Merlin and Objects: To carry on the business of electrical, Napier Sabre aeroplane engines. Altogether wireless and general engineers, etc. Directors: 28,300,000 incendiary bombs were produced by G. B. Pountney, 45a, Church Hill, Northfield, the company, while marine propellers numbered Birmingham; and A. R. Knight, 18, The Cause­ mare than 20,800. Numbers of battleships, way, Yardley, Birmingham. Registered office: cruisers and carriers had been fitted with 45a, Church Hill, Northfield, Birmingham. aeroplane lifting cranes embodying the com­ Mec-Electric, Ltd.—Private company. Regis­ pany’s gears, while some thousands of bomb tered July 9th. Capital, £1,000. Objects: To hoists for aircraft had been produced. carry on the business of dealers in radio sets The Ceara Tramway, Light & Power Co., Ltd., and accessories, batteries, etc. Directors: as negotiating privately in Brazil for the sale W. H. Hawkins, The Vineries, Gillingham, of the undertaking to the Government of the Kent; and L. D. Fleet, 102, Alarick Crescent, ;State of Ceara. New Addington, Surrey. Registered office: The Burma Electric Supply Co., Ltd., states 95-97, High Street, Chatham. that the profit to July 31st, 1944, was £122 M. Brosan, Ltd.—Private company. Regis­ raising the balance carried forward to £1,627. tered June 28th. Capital, £3,000. Objects: To The Palestine Electric Corporation, Ltd., is acquire the business of a television, electrical maintaining the dividend on the ordinary and and wireless manufacturer and wholesale and “ A ” ordinary shares at 5 per cent., tax free. retail distributor carried on by Mrs. M. Brosan. The net profit for 1944 was £119,129 (£125,687) Directors: Margaret Brosan and ,R. Brosan after providing for taxation and £30,000 for (director of British Diamid, Ltd., etc.), both of deferred maintenance. In tfie previous year 187, Willesden Lane, N.W.10. Registered office: £20,000 was allocated to war reserve. The 245, Kilburn High Road, N.W.6. output during 1944 was 173-6 million kWh H.N. Electrical Supplies, Ltd.—Private com­ (against 149-5 million.) pany. Registered June 28th. Capital, £500. The Welwyn Garden Electricity Supply Co., Objects: To acquire the business of a manu­ Ltd., announces a net revenue of £22,460 for facturer of and wholesale dealer in electrical the past year. An ordinary dividend of 1 -8d. supplies carried on by Hyman Nathan, as per share is being paid. “ H.N. Electrical Supplies,” - at 46, Golden E 106 E l e c t r ic a l R ev iew July 20, 1945 House, Pulteney Street, London, W .l. First 5,850 preference and 6,000 ordinary shares taken directors: J. Maizner, 49, Manor Avenue, up. £11,850 paid. Mortgages and charges. S.E.4, H. Nathan, 83, Mount Pleasant Road, £4,525. N.W.10, and A. Fry, 40, Gloucester Place, W.l. Solicitors: Thornton, Lynne & Lawson, 240, Increase of Capital High Holborn, W .C.l. A. Webster & Son (Burnley), Ttd. The nominal capital has been increased by the Lat Manufacturing Co., Ltd.— Private com­ addition of £1,500 in £1 ordinary shares beyond pany. Registered July 5th. Capital, £1,000. Objects: To carry on the business of manu­ the registered capital of £500. facturers of, and dealers in, batteries, accumu­ lators, motors, radiators, torches, motor Mortgages and Charges accessories, etc. Directors: G. V. Lateulere, Modern Telephone Co., Ltd.—Particulars filed 39, Falstaff Road, Shirley, Birmingham, and of £5 000 debentures authorised June 22nd, 1945, two others. Registered office: 38a, Paradise charged on the company’s undertaking and Street, Birmingham, 1. property, present and future, including uncalled Evolution Accessories (Engineering), Ltd.— capital, the whole amount being now issued. Private company. Registered July 4th. Capital, Davey, Paxman and Co., Ltd.— Mortgage on £1,000. Objects: To carry on the business of various properties in Colchester, dated June, manufacturers, importers and exporters of, 12th to secure £380. Holders: Trustees of and dealers in, lamps, bulbs, valves, electrical Colchester Permanent Benefit Building Society. goods, accessories and equipment, neon signs, ultra violet ray, radio and television apparatus, H. Tinsley & Co., Ltd.—Charge on Afton etc. Subscribers: Helen Horowitz, 31, Vallance Lodge, Freshwater, Isle of Wight, dated June Road, F..1; and G. Perlmutter, 58, Lingwood 21st, to secure £2,000 and any other moneys Road, E.5. Secretary: E. H. Hawtin. Regis­ due or to become due from the company to tered office: 203, Regent Street, W .l. the Temperance Permanent Building Society. Electrical Products (Colne), Ltd.—Private company. Registered July 2nd. Capital, Liquidations £1,000. Objects: To carry on the business of Relay Equipment, Ltd.— Meeting of members electrical, motor, television, radio and August 14th at the offices of Newman Ogle, mechanical engineers, etc. Directors: E. Bevan & Donald, Spencer House, South Place, Pearson and Blanche Pearson, both of 28, E.C.2, to hear an account of the voluntary Selby Street, Colne. Registered office: 29, winding-up by the liquidator, Mr. W. H. Albert Road, Colne. Bevan. Lancing Electrical Manufacturing Co., Ltd.— B. & B. Batteries, Ltd.— First meetings of Private company. Registered July 5th. Capital, creditors and contributories July 24th at £1,000. Objects: To carry on the business of Columbia House (3rd floor), Aldwych, W.C.2. electrical, wireless and general engineers, etc. Directors: F. W. Langley, Methuen House, Princeley Radio & Television Corpn. (of Gt. Crabtree Lane, Lancing; L. L. Lloyd, 1, Rose­ Britain), Ltd.— First meetings of creditors and bery Avenue, West Worthing and L. D. Holgate, contributories July 24th at Columbia House 2, East Road, S.W.19. Registered office: (Room 56, 5th floor), Aldwych, W.C.2. Commonwealth House, New Oxford Street, Whitehead Switchgear & Inventions, Ltd.— W .C.l. Last day for receiving proofs for dividend F. E. Jagger, Ltd.—Private company. Regis­July 27th. Liquidator, Mr. L. S. Findlay, 35, tered June 22nd. Capital, £1,000. Objects: Windsor Place, Cardiff. To carry on the business of manufacturers of, and dealers in, electrical equipment, batteries, lamps, etc. F. E. Jagger, 62, Abbotsford Road, Bankruptcies Blackpool, is the first director. W. G. Head, electrical engineer, lately carrying on business at 30a, High Street, Ashford.— Application for discharge to be heard on August Companies’ Returns 7th at the Guildhall, Canterbury. Statements of Capital T. R. W. Wyness and G. W. Bale, trading as Wyness & Bale, electrical engineers, 13, Com­ Phttnix Electrical Co. (London), Ltd.—Capital, mercial Street, Brighouse, Yorks. (Separate £1,500 in 1,494 preference shares of £1 and 120 application of G. W. Bale.)—Application for ordinary shares of Is. Return dated October discharge to be heard on August 2nd at the 27th (filed December 20th), 1944. All shares County Court, Prescott Street, Halifax. taken up. £1,500 paid. Mortgages and R. J. M. Holmes (deceased), late of 17, Buston charges: Nil. Terrace, Newcastle-upon-Tyne, electrical en­ Scott Insulated Wire Co., Ltd.—Capital, gineer.—Last day for receiving proofs for £14 000 in 4,000 preference and 10,000 ordinary dividend July 28th. Trustee, Mr. A. K. shares of £1. Return dated December 31st. Ferguson, Gibb Chambers, Westgate Road, 2 075 preference and 10,000 ordinary shares Newcastle-upon-Tyne, Official Receiver. shares taken up. £12,075 paid. Mortgages and J-J. Symons, formerly carrying on business charges: Nil. as the Zodiac Peerless Electric Lamp Co., at Universal Electric Time & Telephone Systems, 25, Denmark Street, Charing Cross Road, Ltd.—Capital, £12,000 in 6,000 6 per cent W.C.—Order for discharge made at the London cumulative redeemable preference and 6,000 Bankruptcy Court on July 10th, subject to ordinary shares of £1. Return dated March 5th. judgment for £585. July 20, 1945 E l e c t r ic a l R eview 107

preferred to 114. In spite of this. Globe Tele­ STOCKS AND SHARES graph & Trust ordinary are Is. 6d. to the good T u e sd a y E v e n in g . at 44s. International “ Tel. & Tel.” are two ^JT O C K Exchange markets await with caution dollars lower at 33, on selling from New York, ^ the issue of the General Election. At the where a spasm of weakness was attributed to time ot the poll, a good deal of optimism was fears of a Labour victory at our polls. Ceara manifest. Estimates of a Conservative majority Tramways debenture has spurted to 60 on the were running high. For no special reason, the likelihood of the company being taken over hopefulness then engendered, gave way to a by the Brazilian Government. The price stood more subdued sentiment. Prices that had been at 42-J at the beginning of this month. advanced pretty sharply on the eve of the Electric Construction Election gave way from the best, and the markets assumed a slightly duller cast. Here The Electric Construction Company’s year and there, speculation and speculative invest­ ends with March, and the annual report which ment make their influence felt, but speaking appeared last July showed record results. The generally, the present disposition is to wait accounts for the year ended last March report upon the course of events for the next week or rather less profit, although the reduction, so. An actit/e market prevails in Cossor shares. £3,600, is negligible and has, of course, no effect upon the dividend which is maintained, as In the radio group as a whole, interest is well sustained. previously announced, at 12+ per cent. The company's report is particularly inter­ Home Railways esting from its reference to the decrease in The Home Railway dividend season opens national work and in Government orders. The next week, but the interim dividends for the report points out that an interval must elapse first six months of the year excite no more than before the works can return to normal peace­ tepid interest. The Southern Railway will pre­ time production, but, in his statement, the sumably pay the usual half yearly 2^ per cent, chairman says that the prospects are good. due on the preferred stock. The price shows no From this, it is reasonable to expect that the change at 75-J-, but the 5 per cent, preference is 12^ per cent, dividend, under ordinary condi­ better at 1 1 8-J-. London Passenger issues hold tions, can be continued. their previous levels. British Electric Traction At the present price of £3 a share, the yield deferred is 15 points better at 1215, and Tillings comes to £4 3s. 4d. per cent, on the money. hold their previous advance to 58s., declaration The company is in a strong financial pos'ition of the customary interim dividend of 5 per cent, and the general reserve has been raised to having no effect. £250,000 by the allocation of £20,000 from profits of the past year. The Rising Tide Revo Electric British Insulated Callender’s Cables arc Is. Revo Electric has done well for the year higher at 45s. 6d., and Henley’ s keep steady at ended March 31st, Iasi, the profit, after 28s. Siemens, after 39s., returned to 38s. 6d., depreciation, being £249,266, an increase of leaving a rise of 4s. in three weeks, while Johnson £48,000. When all allowances are made, there & Phillips, at 79s. 6d., have put on 4s. 6d. in is £70,121 left, against £66,845 for the previous about the same time. English Electrics are Is. year. Reserves are raised to £250,000 and ihe higher on the week, at 56s., Crabtrees 6d. better dividend, as already announced, with the bonus, at 43s. 6d., Metal Industries “ B ” similarly makes 17 1 Per cent, for the year. At the harder at 51s. 6d., while International Combus­ currently-quoted 44s., the yield on the money is tions at 8-J and Tube Investments at 5| are practically 4 per cent. The company’s issued both 2s. 6d. up. Westinghouse Brake have ordinary capital of £367,500 is all in ordinary risen to 79s. Veritys are a little higher at 9s., shares of 10s. each. and Allen Wests at 8s. 6d. Ward & Goldstone remain at 30s. 6d. East African Power new New M on ey shares at 6s. remain at the issue price of 29s. Withdrawal of the ban on new capital issues The General Electric Company has declared ranging up to £50,000 is of material assistance its usual dividend of 10 per cent, and bonus of in those cases where comparatively small 7j per cent., making 17+ per cent, for the year. amounts of money are required, rather than The price of the shares now treads closely upon such considerable sums as would render neces­ the level £5, at which the yield on the money sary an approach to bankers or to shareholders. would be 3^ per cent. No official permission need be applied for on behalf of a company wanting to raise anything Miscellaneous Movements up to £50,000. The intention has been to assist A. C. Cossor shares are an erratic market the smaller business. The bigger concerns, how­ and at 41s. 6d., the shares are Is. lower. ever, experience the benefit of the wider relaxa­ Philco eased off to 14s. E.M.l. came back to tion now allowed to companies, and others, that 34s. 9d., after being 9d. higher. Telephone wish to obtain additional capital for the exten­ Rentals hardened to 12s. 9d. Cable & Wireless sion and development of their business under ordinary receded to 92 and the 5} per cent. peacetime conditions. 108 E l e c t r ic a l R ev iew July 20, 1945 M P A T E N T S Electrical Specifications Recently Published The numbers under which the specifications will be scales suitable for use in radio receivers.” printed and abridged are given in parentheses. 20628. December 9th, 1943. (570224.) Copies o f any specification (Is. each) may be T. Price & Son (Stampers), Ltd., and E. E. obtained from the Patent Office, 25, Southampton Price.—“ Electrically heated smoothing irons.” Buildings, London, W.C.2. 14969. September 13th, 1943. (570303.) . J. G. ADAM S. — “ Electric water heaters.” L. J. Van Rooyen and W. O. Agar.—“ Radio 18105. November 2nd, 1943. (570316.) direction finders.” 1502. February 4th, 1942. PW. Blackman, Cinema-Television, Ltd., and (570204.) G. A. R. Tomes.—“ Photo-electric cells.” Scophony, Ltd., and G. Wikkenhauser.— 6478. May 20th, 1941. (570199.) “ Systems for transmitting intelligence with the Bratt Colbran, Ltd., and R. H. Masterman. aid of a beam of light.” 21555. December —“ Electric heating elements.” 14725. Sep­ 23rd, 1943. (570227.) tember 8th, 1943. (570300.) C. Shaw. — “ Electrically heated floors.” British Thomson-Houston Co., Ltd.— 11101. July 8th, 1943. (570251.)- " Modulation indicating or measuring means.” Siemens Bros. & Co., Ltd., and R. S. Bone.—- 19498/43. November 23rd, 1942. (570279.) “ Telephone instrument circuits.” .21408. British Thomson-Houston Co., Ltd., and J. December 21st, 1943. (570291.) Moir.—“ Thermionic valve voltage regulators.” Siemens Electric Lamps & Supplies, Ltd., 14515. September 6th, 1943. (570299.) and J. N. Aldington.—“ Metal vapour electric- British Thomson-Houston Co., Ltd., and discharge lamps.” 19396. November 19th, J. H. Walker.—“ Inductor alternators.” 9754. 1943. (570324.) June 17th, 1943. (570246.) C. G. Smith.—“ Secondary batteries.” 17778. C. A. V., Ltd., W. A. Bevis, T. Curzon and October 28th, 1943. (570312.) V. Bedggood.—“ Electric switches suitable for H. G. Solomon.—“ Electric condensers more gun firing mechanisms.” 20364. December 6th, particularly intended for the production of 1943. (570285.) h.f. impulses and for use in h.f. circuits." Cinema-Television, Ltd., and A. Sommer.— 11187. July 9th, 1943. (570188.) “ Methods of coating surfaces by evaporation.” Standard Telephones & Cables, Ltd., and 16553. December 23rd, 1941. (570200.) L. J. Heaton-Armstrong.—“ Antenna systems.” Communications Patents, Ltd., and G. B. 417. January 12th, 1942. (570201.) Ringham. — “ Radio wave trans-receivers.” Standard Telephones & Cables, Ltd., and 20036. December 1st, 1943. (570283.) L. H. Webb.—“ Electrical connecting elements.” Consolidated Mining & Smelting Co., of 12707. August 6th, 1943. (570255.) Canada, Ltd. — “ Addition agent for caustic F. L. Steghart.— “ Electric measuring instru­ alkali electrolytes used in the production of ment.” 10962. July 6th, 1943. (570184.) hydrogen and oxygen.” 7868/42. June 26th, W. E. Stilwell, Jnr.—“ Remote control 1941. (570233.) circuit-breaker with overload protection.” F. B. Dehn (Richmond Manufacturing Co.). 8229/43. June 5th, 1942. (570264.) “ Circuit- —“ Magnetic separators.” 20826. December breakers for controlling electric circuits.” 13t, 1943. (570195.) 19722/44. June 5th, 1942. (Divided out of E. I. Du Pont De Nemours & Co.—“ Elec­ 570264.) (570293.) trically insulated conductors.” 21448/43. V. G. Manufacturing Co., Ltd., and W. December 28th, 1942. (570226.) Blain.—“ Connectors for electrical conductors.” E. I. Du Pont De Nemours & Co., and A. G.15218. September 16th, 1943. (570307.) Gray.—“ Electrodeposition of lead.” 20681. Westinghouse Electric International Co.— December 10th, 1943. (570287.) “ Control systems for electric motor driven G. H. Fletcher and Metropolitan-Vickers vehicles.” 4517/43. March 19th, 1942. Electrical Co., Ltd.—“ Power transmission (570215.)' toothed gearing.” 14055. August 27th, 1943. (570192.) L. Fuller and E. W. Sudlow.—“ Electric secondary batteries.” 17382. October 21st, TRADE MARKS 1943. (570309.) ^WlHE following applications have been made H. Jefferson.—“ Phase shifting circuit arrange­ for British trade marks. Objections may ments.” 1497. February 4th, 1942. (570203.) be entered within a month from July 11th:— O. E. H. Klemperer.—“ Cathode ray tubes.” G l a d ia t o r . No. 629,822, Class 9. Wireless 2406. February 13th, 1943. (570213.) and television instruments and apparatus, Landis & Gyr, Soc. Anon.—“ Coin freed loudspeakers, sound amplifiers, battery chargers apparatus, e.g., for electricity or gas.” 13378/42. and parts thereof iujt included in other classes. January 8th, 1942. (Patent of addition to Metropolitan Distribution, Ltd., Trewirgie 550395 and 563041.) (570209.) Vean, Falmouth Road, Redruth, Cornwall. Linde Air Products Co.—“ Electric welding H e s c o . N o . 633,990, Class 9. Electric flat apparatus.” 20803/43. December 18th, 1942. irons and vacuum cleaners.— Hornby Electrical Î570288 ) Supplies Co Ltd., 21/25, St. Anne’s Court, J. Lucas, Ltd., J. A. Laird and H. E. White- London, W .l. house.—“ Ignition magnetos.” 19797. Novem­ A l d a c o . No. 634,865, Class 11. Rings for ber 26th, 1943. (570281.) holding electric lamp shades. — Archibald Marconi’s Wireless Telegraph Co., Ltd., Lawrence Williams, 14, Laburnum Grove North G L Grisdale and H. C. Norwood.—“ Logging End, Portsmouth. July 20, 1945 E l e c t r ic a l R ev iew 109 CONTRACT INFORMATION Accepted Tenders and Prospective Electrical Work

Part of work of laying e.h.v. mains from Contracts Open Prince Albert Road to the power station Where “ Contracts Open "■ are advertised in our (£3,500).—Standard Telephones & Cables. “ Official Notices " section the date o f the issue Cables: extension of contracts for one year is given in parentheses. from August 1st.—Metropolitan Electric Cable B e lfa s t.—August 3rd. Electricity Depart­ & Construction Co.; Standard Telephones & ment. Fire extinguisning equipments for sub­ Cables. stations; and replating battery. (See this Newcastle-on-Tyne.—City Council. Accepted. issue.) Fittings for relighting the High Level and Chichester.—August 17th. City Council. Redheugh bridges (£981).—G.E.C. About 20 miles of 11 kV and control cables and Stockport.—Electricity Committee. Accepted. accessories. (July 13th.) Underground disconnecting boxes (£267).— Littleborough.—July 23rd. Electricity Depart­ W. Lucy & Co. 6 -6-kV switchboard and oil ment. 11-kV ring-main unit and l.v. switch- circuit-breaker for Winifred substation (£648). gear. (July 6th.) —Ferguson, Pailin. Switchgear spares (£503).— G.E.C. L ow esto ft.—July 26th. Electricity Depart­ ment. Supply and delivery of l.v. cable. (See Swinton and Pendlebury. — Electricity Com­ mittee. Accepted. 1,500-kVA transformers this issue.) (£1,220 each).— Metropolitan-Vickers. 500 and Manchester.—July 30th. Electricity Depart­ 300-kVA transformers (£468 and £325 each).— ment. Manufacture, testing and delivery at English Electric Co. Stuart Street generating station of 33,000-V Torquay.—Electricity Committee. Accepted. cable. (July 13th.) 11-kV switchgear for strengthening distribution New Zealand.—September 18th. Public system (£5,680).—B.T.H. Co. Works Department. One 23,000-BHP turbine and 16,667-BHP generator for Waitaki power scheme. Contracts in Prospect Southampton.—August 1st. Electricity De­ Particulars o f new works and building schemes for partment. Cables and domestic appliances. the use o f electrical installation contractors and traders. Publication in this section is no guarantee (July 13 th.) that electrical work is definitely included. Alleged Sw ansea.—August 4th. Borough Council. inaccuracies should be reported to the Editors. Electrically equipped pumping station at Morri- stone Park. Trevelyan Price, waterworks Alnwick.—Conversion of Bondgate Hall into engineer, Guildhall, Swansea. (Deposit, £5 5s.). Council Offices; U.D.C. surveyor. Whittingham, Preston.—August 3rd. Mental Ancoats.—Works additions, Bradford Street; Hospital. Supply and erection of generating Moston Brick and Building Co., Ltd., builders, plant and other electrical gear. (July 13th.) Kenyon Lane, Moston, Manchester, 10. Billingham-on-Tees.—Printing works, Station W ilto n .—August 25th. Borough Council- Supply and erection of a public lighting installa­ Road, for the Billingham Press, Ltd.; A. W. tion in the borough. Borough surveyor, Holt, architect, Bishopton Road, Stockton-on- Municipal Offices, Fugglestone House, Wilton. Tees. Bishop Auckland.—Houses (J2); U.D.C. Workington.—Borough Council. Electrical surveyor. installations in connection with the erection of 150 permanent houses at Salterbeck housing Caernarvonshire.—Erection of new library, at estate. A. B. Cooper, borough engineer, Town Education Offices, Caernarvon; Architect’s Hall, Workington. (Deposit, £2 2s.). Department, County Offices, Caernarvon. Chesterfield. — Works additions, Clayton Street; Hyde & Son, Ltd. Orders Placed Houses (25), Old Hall site; borough engineer Darlington.—Corporation. Accepted. E.h.v. Darlington.—Factory, Valley Street North, switchgear in connection with alterations and for Boyd & Son; Lawson & Boddy, builders, additions to electricity supply in the Eastbourne Maude Street. area (£1,730).—A. Reyrolle & Co. Dumfries.—Houses (36), Lincluden ; burgh H u ll.—Electricity Committee. Accepted. 5- surveyor. ton mobile crane (£1,384).—Herbert Morris. Durham.—Houses on cleared sites at Elvet, Cable for five years.—Crompton Parkinson. Church Street and Hallgarth Street; city L ive rp o o l.—Electricity Committe. Accepted. engineer. Equipment of static substations.—J. G. Statter East Sussex.—Workshops for woodwork, & Co. (£1,449); A. Reyrolle & Co. (£2,035). plumbing, etc., at County School, East Grinstead Busbar panel transformers, distributors.— (£2,700); county architect, County Hall, Lewes. 1. G. Statter & Co. (£456); English Electric Gateshead.—Additions to works for Clarke, Co. (£505). Chapman & Co., Ltd. L ond on .—St. Pancras.—Contracts and Lib­ Glasgow.—School at Penilee; city architect. raries Committee. Recommended. Four rows of panels for meter racks (£84).—Bertram Guildford.—Houses (70); borough engineer, Thomas (Engineers). Municipal Offices, High Street. 110 E l e c t r ic a l R ev iew July 20. 1945 Hastings.—Three school kitchens; borough Reddish.—Foundry, Conway Street; Storey engineer. Foundry Co., Ltd., Sheffield Street, Heaton Ipswich.—Dwellings (32), St. George's Street; Norris, Stockport. E. McLaughlan, borough surveyor. Rotherham.—Houses for R .D .C .: Lawton, Lancaster.— Houses (72), Hare Runs estate; Knight & Co., architects, Regent House, borough engineer, Dalton Square. Moorgate, Rotherham. Lichfield.— Houses and bungalows (52), for Rugby.— Houses (76), Overslade estate; R .D .C .; J. G. Rimand, architect, Rural Council borough surveyor. The Lawn. House, Lichfield. Sheffield.—Laundry; South Yorkshire D istric t Liverpool.—Offices and works, Breckside Laundries Association, Shiregreen, Sheffield, 5. Park: Unit Construction Co., Bentham Drive, South Shields. — Extensions to H a rto n Childwall, Liverpool, 16. Laundry: T. A. Page, Son & Bradbury, King London.—Rebuilding St. Mary’s Hospital, Street. South Shields. Praed Street; A. W. Hall, architect, 9, South­ S to c k p o rt.—Houses, Holly Street and Canter­ ampton Row, London, W.C.l. bury Road: Hugh Owen & Sons, Ltd.. builders, Longbenton.—Rebuilding ten war-damaged 35, Dialstone Lane., houses; U.D.C. surveyor. Sunderland. — Extensions to factory for Manchester.—Experimental houses: William National Galvanizers. Ltd.; Huntley & Sons, Arnold, Ltd., Upper Brook Street, Chorlton- Marion Street, Sunderland. on-Medlock, Manchester, 13. Swinton.—Extensions to calico printing w orks, Northampton.—Conversion of Council Oak Street: Sackville & Swallow, Ltd., calico Chamber into offices (£2,000), for R .D .C .; printers, 105, Princess Street, Manchester, I. R. J. Miller, surveyor, 1, Spencer Parade. T en te rd en .—Houses (27) for R.D.C.; G. D. Oxford.—Dining hall and kitchen unit Forder, surveyor, Council Offices, East Hill, (£3,380), Temple Cowley School; borough Tenterden, Kent. engineer, Municipal Buildings. Walsall.— X-ray block at Manor Hospital Paisley.—Proposed new maternity hospital (£1,500); borough engineer. to cost £500,000; T. Tait, architect. Houses, Ferguslie (40) and Gallowhill (160); Wolverhampton.— Scheme for civic centre; burgh surveyor. W. Mervyn Law, borough engineer. Pocklington (Yorks).—Houses (85) for the W o rth in g .—Central packing station, West R .D .C .; W. A. Kellett, architect, 8, Lendal, Worthing railway station; F a rm e rs & G ro w e rs York. Industries, Ltd. \ew s from South A frica B y our Cape Town Correspondent

A T the nineteenth convention of the Associa- abandonment in 1942 due to war conditions, tion of Municipal Electricity Undertakings sales of appliances amounted to £1,500,000 and of South Africa and Rhodesia, the city electrical the electricity consumption developed from engineer o f Salisbury, Mr. J. S. Clinton, was 65,000,000 to 300,000,000 kWh. The C o u n c il elected president. He said that the gesture was has seven showrooms in different parts of the particularly appreciated as he would shortly be city area and these are likely to be p u t in to use leaving Salisbury and then would no longer be again in the near future. Similar developments in charge of a municipal electricity undertaking. wall certainly also take place in towns like In his address Mr. Clinton suggested that the Johannesburg and Durban. membership of the Association should be G e n e ra tio n widened to admit representatives of Chambers of Commerce and of such industries as those There is a growing feeling in certain parts of manufacturing and distributing electrical goods, South Africa that a ll the main electricity and organisations like the Cable Makers’ generating stations should pass into the control Association. If membership were extended to of the Electricity Supply Commission, which the staffs of undertakings the Association would undoubtedly has a great record of achievement. be that much more powerful. He envisaged On the other hand, many of the municipalities the possibility of a National Joint Electricity are eager to retain their power stations. At Board emerging from such an identity of Port Elizabeth, for example, there has been interests. some agitation from industrial interests for the local power station to be taken over by the Sale of Electrical Appliances Commission, which it is felt could better assure There has been a proposal to the Cape Town the increasing supply that will be needed fo r the City Council from traders that the Council industrial developments of the future. H o w e ve r, should not resume the hire-purchase sale of extensions now planned by the Port E liza b e th electrical appliances when these return freely Electricity Department, which will add 40,000 to the market. This suggestion has been kW to the total generating station c a p a c ity , rejected. In the twelve years that the hire- should enable the Department to meet the purchase scheme was in operation before its additional demand. July 20. 1945 E l e c t r ic a l R ev iew 45

c 0 ^ K C t S

p X t i ^ j o ,

« a s s ^

BAKER PLATINUM LTD., 52 HIGH HOLBORN, LONDON, W.C.I 46 E l e c t r i c a l R e v ie w July 20, 1945

GpPtkijpt/ TpCtMttfs f& t fX ocfou ; ^?UkMtUXS

A 300 Kw. ELECTRIC FURNACE CONTROL PANEL with Contact­ ors for main and zone elements, fan motors, entrance and exit door motors © Coils of all Contactors fed from rectified A.C.

©= D ONO VAN S_ THE DONOVAN ELECTRICAL C? LT.° BIRMINGHAM, 9 ELECTRICAL ENGINEERS AND STOCKHOLDERS. P h o n e - STEchforo 2 2 7 7 (P.B.X.) G s a m s -DONOVAN,Birmingham'

THE “SENIOR SERVICE” ------of------M anufacturi ng Electrical and Light Mechanical Engineering

• LABORATORY AND TEST He is the man who has to use the tools you provide and he knows their merits. There is EQUIPMENT, a FI extol machine for every job, — Filing, Grinding, Scurfing, Polishing, Flexible Disc INDUCTANCES OF ALL Grinding, Screw Driving, Nut Setting, etc. Send for Catalogue No. F 22- TYPES FOR TRANSMITTERS FOR HOME AND TROPICAL USE Dnvncnc t y _ nnmp.i f r o c f o^C P0WERJ5RIVEN HAND TOOLS_ Trodt Uq'i Admiralty and Air Ministry, etc. ' More Power to your elbow ’ JOYCE ENGINEERING LTD. Sole Manufacturers and Patentees 25 Finchley Lane, Hendon, London, N.W.4 FLEXTOL ENGINEERING CO. LTD THE GREEN, EALING, LONDON W E Phone: HENdon 7437-8-9 - - c ™ , : •• Dominating ", Eaiux.

95-13* July 20, 1945 Ele c t r ic a l R eview 47

uni

h ALCHORE PASTE FLUX ' SOLDERING FLUID ' SOLDER CREAM - CORED SOLDER Official approval references D.T.D. 599 Insp./Mats./1096/INMI A.M. Wireless & Telegraphy. Specification Use W .T. Appendix 7 (Addendum) M.A.P. R.D. Mat. Res. Mat. 677/R.D. Mat.l/(a)/E A.M. Meteorological Office 37/2/43 RELEASABLE a .m . 70S FRY'S METAL FOUNDRIES LTD

AND AT MANCHESTER, BRISTOL, GLASGOW AND DUBLIN 48 E l e c t r ic a l R e m e w July 20. 1945

BRIGHT STEEL HEXAGON NUTS Guaranteed Accuracy to Aircraft Also made in brass Standard for all electrical purposes including oil circuit breakers. etc.. etc. CJ VISLOK ‘ Pure as the lily," though poetic, is not veri- ENGINEERING LTD. precise We can be precise as to the puritv of hydrogen and oxygen produced by Knowles A.I.D. Fully Approved Electrolytic Plant—guaranteed to give MARKET hydrogen 99'95° 0 pure with oxygen 9g S ° 0 pure. HARBOROUGH Phone: 224S (3 lines) Hydrogen of this purity can be used without further treatment for processes such- as the hydrogenation of oils for foodstuffs, svn- thetic processes involving catalysts, reduction of metals, etc. Besides the merit of producing such pure gases, Knowles equipment has mam technical and operating advantages, includ­ ing absolute safety under all conditions, very low maintenance charges and long trouble-free life. Plants in operation all over the world, from small to the largest sizes. A typical large plant absorbs 10,000 am ps a t 650 volts, yielding 49,500 cu. ft. of hydrogen per hour. Electrolytic plant forms a highly suitable off-peak load.

w ELECTT.dLTTTC PLAfPT rC S KTZÏRÎX3£3i E- OTTGEM

THE INTERNATIONAL E L E C T R O L Y T IC P L A N T Co. Ltd. SANDYCROFT - - - CHESTER

# HO. 13 July 20, 1945 E l e c t r ic a l R ev iew 49

STRAIGHT-ON STAR-DELTA STATOR-ROTOR

M . S C . S . ^ CONTACTOR STARTERS ARE AVAILABLE FOR WALL OR PEDESTAL MOUNTING. SINGLE UNITS CAN BE BUILT UP IN BOARD FORM AS ILLUSTRATED.

Write for Descriptive Literature M. & C. SWITCHGEAR LTD. \ § / KELVINSIDE WORKS, KIRKINTILLOCH, GLASGOW SALES & SERVICE ; OLIVE GROVE RD. SHEFFIELD, 2. LONDON OFFICE : 36 VICTORIA ST., S.W.I 50 E le c t r ic a l R ev iew July 20, 1945

SPRING OPERATED

CABLE

DRUMS

All sizes and types of self-winding drums supplied for electrical cable or pressure hose. O ur experience is at your disposal. Quotations promptly upon receipt Small Rivets , a speciality of particulars of your requirements. IN ALL SIZES FOR ALL PURPOSES 86 - 88 CONSTITUTION HILL BIRMINGHAM I 9 The NEWEY ENGINEERING CO. LTD. Phone: COLMORE 4010 BROOK ST., NOTTINGHAM London Agent : E. J. Cookson, 10 Devonshire Chambers, Telegrams : “ Newbeck, Nottm.” Phone : 41045/6 Nottm. 146 Bishopsgate, E.C.2 RESISTORS

BASIC METALS - ALUMINIUM, ZINC,TIN AND LEAD

MITCHELL VITREOUS ENAMELLED RESISTORS are made to a high standard of accuracy and finish. All approved types are available. W e invite enquiries for these and any other form of resistance. A.I.D. Send details of your requirements to : a p p r o v e d MITGTtLL ELECTRIC W rite fo r T reatise on D ie C astings LI M IT tD SPARKLETS LIMITED

88-90, TENNANT STREET, Tel.: MIDIand 3096 B IR M IN G H A M 15 July 20, 1945 E l e c t r ic a l R eview 51

BUILDING Q n e of the greatest tasks which lies ahead of the nation in the coming days of Peace will be the building of factories and houses. Factories to employ those now employed in winning the w a r ; factories to produce the goods which we must soon export in vast quantities; houses for countless people who have lost their homes; houses for those who have never yet set up a home; BUILDING—truly a word of deep 'meaning. Modem building on a large scale calls for POWER in many and various ways, but wherever there is a need for power there is a PETTER ENGINE to fit the job. May we place our long experience and knowledge at your disposal.?

Available In a wide

range from It 5 4 0 B.H.P. ENGINES

P E T T £ ft S 1 T 0 LOUGHBOROUGH t N G t A N D 52 E le c t r ic a l R ev iew July 20, 1945 For quick, safe and economical repair of commutators and other electrical equipm ent Westminster Commu­ tator Cement offers a cheap, efficient, quick method of curing dam­ aged insulation without holding up the machine for more than half an ^ e s t m i n s t e hour. There is no need to remove the armature ^ m v t a t c or skim the commutator with a grinder. Dam­ c e m e n t aged mica can be easily Don’t wait removed and gaps filled until trouble develops before with Westminster Com­ ordering. W ith present delays in mutator Cement on the delivery valuable time may be lost spot, making a perma­ and the machine may remain idle nent repair and saving for several days or weeks. considerable time,money Every user of electric motors should I iWf and labour. keep Westminster Commutator Cement Used by Electrical Undertakings outfits handy in case of emergency. A Government Departments, Lon­ sound investment I Obtainable direct don Passenger Transport Board, from the manufacturers. National Physical Laboratory, Railway and Shipping Com­ A complete outfit "1 IfT panies, Collieries, Stores, etc. costs only * * WESTMINSTER LABORATORIES LTD., West Works, PENN, Bucks.

INSULATION is the 1 INMERSION vital factor on which STERILIZER depends the effici­ ency of all electricity supply. Rely upon the knowledge and experience of spec­ ialisation.

\0

QUICK BOILING. SEAMLESS BOILER, SIZE 11 x 5£ x 4. FULL AUTOMATIC HEAT CONTROL

From all Electrical Wholesalers and SuRGicALf quipmentSupplies Lto Factors WESTFIILDS ROAD, LONDON, W. 3 Manufactured bp: Names cf local Deot/en ivfft/ioe/ 0» ■'¿a c rt ROTUNDA LIMITED July 20, 1945 E l e c t r ic a l R eview 53

ROYAL EDISWAN ¿¿AW

THE EDISON SWAN ELECTRIC CO. LTD. 155 CHARING CROSS RD„ LONDON, W.C.2 (L. 6S) 54 E le c t r ic a l R eview July 20, 1945 POCKETS OF CAPACITY

Manufacturers are permitted to utilise “ pockets of capacity ” in their works as fluctuating service requirements permit for the manufacture of their normal products.

But until the war is finally won service requirements still claim absolute priority.

For this reason Venners regret their inability to give guaranteed immediate delivery promises for time switches and meters, although no opportunity is missed to reconcile the demands of war and peace. VENNER Time Switches Ltd.

KINGSTON BY-PASS RD., NEW MALDEN, SURREY

CERAMIC INSULATORS FOR RADIO Mill

HANDLAMP.

A LSO FO R HIGH TENSION

LEAVES LOW TENSION BOTH AND HANDS FREE liii, REFRACTORIES l|£ + 33V/0% I I > ( SUBJECT) plus Purchase Tax JAMES MACINTYRE & Co. Ltd. R ef. No. A 69 WASHINGTON WORKS BRITISH CENTRAL ELEC T R IC A L CO. LTD. BURSLEM 6*8 Rosebery Ave.LondoatCI m Terminus 2525. A I July ^.0, 1945 Electrical Review 55 BRITANNIC CABLES

AN INDEPENDENT COMPANY, MAKERS OF E.H.T.

AND LT. PAPER MAINS CABLES, VARNISHED CAMBRIC

C T A MINING THAI LING, “ IVERITB" INSULATED CABLES AND THERMOPLASTIC CABLES (P.V.C.

BRITANNIC ELECTRIC CABLE & CONSTRUCTION CO. LTD. IVER BUCKS Telephon«: IVER 491 Telegrams '^BRITANNIC, IVER”

V u iitêd , é if tA o le,

(X iïiM jin ÿ ÿ/ieü t7

The engineers responsible for equip­ have been functioning without pause ping 500 of Britain’s Power Stations or hitch for over 30 years. You should pinned their faith to Tudor Accumu­ specify Tudor for important jobs. lators. This confidence was justified safetylyte (Patent No. 313248 )> by the Tudor record of unsurpassed the Tudor Emergency Lighting System, is automatic and instan­ efficiency and reliability. Many of taneous in operation. It is installed the largest battery installations in the in thousands of schools, hospitals. factories and other large buildings. country are Tudor, and some of these

The Tudor Accumulator Co., Ltd., ACCUMULATORS 50, Grosvenor Gardens, A V .^.U nU LM I London, S.W.i. S L O a n e : 0168/9

WT35b /44

F 56 E le c t r ic a l R ev iew July 20, 1945

concentricity vital for bearings fitted to Machine Tools or running at Ultra High Speeds is held to the closest limits in R & M bearings...... individual rings as well as the finished bear- ¡ng are a'l carefully checked to ensure this.

RENOWNED FOR ACCURACY

RANSOHE&MRLES NEWARK on TRENT BEARING COLTD ENGLAND July 20, 1945 E l e ct r ic a l R ev iew 57 Fuel efficiency starts with

Specialist ideas for Management

fuel efficiency is not only a wartime expedient: it is a basic factor in factory control. There cannot be any doubt that plant output and production costs— vital elements in all future plans— depend to a very considerable degree on correct and efficient fuel usage. • To help industrial management the Ministry of Fuel and Power have issued a series of Bulletins, written by experts and full of really practical suggestions. They cover almost every aspect of the efficient use of fuel, heat and power. The personal attention of management is directed especially to the following Bulletins:

no. 7 ‘ The Appointment and Responsibilities of Fuel Watchers.’ no. 8 ‘ Bonus Schemes for Fuel Economy in Industry.’ no. 12 ‘ Thermal Insulation of Buildings.’ no. 13 ‘ Fuel Economy by Saving Electricity.’ no. 15 ‘ The Effect of Variations in Output on Heat Consumption.’ no. 21 ‘ The Construction of a Factory Heat Balance.’ no. 26 ‘ Peak Steam Demands. Cause, Effect and Cure.’ no. 31 ‘ Fuel Economy by Water Saving.’ no. 37 * Small Vertical Boilers, Steam Cranes and Shunting Engines.’

• m a y w e SUGGEST that you call together for a few minutes your departmental heads and fuel watchers. Ask each to check the Bulletins he already holds and those he ought to have. Extra copies will be supplied free by your Regional Office of the Ministry of Fuel and Power.

BY THE MINISJRY OF FUEL AND POWER 58 E l e c t r ic a l R e v iew Julv 20, 1945

MAKE YOUB 'ELECTRICS’ still more economical

A MirndfkjJ Refuse Collector driven by a Britannia . battery, tofnek is in commission in one of our biggest midland cities. TWYN1NG ROAD, ST1RCHLEY, BIRMINGHAM TeL: King's Norton 2281 (2 lines). Gram s: Radiagilb, B’ham B y powering your ‘ Electrics’ with Britannia batteries you will effect considerable economy. Because the special construction of their cells gives immense mechanical strength, these batteries withstand the severest stresses of traction service, and consequently h a v e a n ex­ ceptionally long, trouble-free life, which means a substantial c u t in o p e r a t in g costs.

LEAD ACID VEHICLE BATTERIES lt. H. SYMOMKÜ Li Briunni» Batterie», Lid. * Redditt* * Toai. 39. VICTORIA STREET W E S T M I A S T E R. S-W .l C o n t a c t o r T y p e S t a r t e r s For A . C S e r v i c e

IGRANIC ELECTRIC CO. LTD. specialise in the manufacture of Contactor Type Starters for all types of Electric Motors for all classes of Service. Equip your electrically driven machine with the correct control gear to protect your motor and machine by specifying IGRANIC.

Illustration shows type 1080 Combined Stator and Rotor Starter.

r7T \ IGRANIC ELECTRIC C?LT? BEDFORD 6 LONDON 60 E l e c t r ic a l R ev iew July 20, 1945

JENSON & NICHOLSON L I M ! T ED

/ / ' t c t f t r Ç fffu/riÙ >

Makers of high-quality Industrial Finishes to the ELECTRICAL ENGINEERING INDUSTRY

JENSON & NICHOLSON LTD INDUSTRIAL FINISHES DIVISION 36 St. James's Street * London ’ S W l

LONDON CALCUTTA JOHANNESBURG MELBOURNE HAIFA

IN ADDITION T O A COMPREHENSIVE R A N G E O F x STANDARDISED SIZES, SPECIAL TYPES ARE MADE AT SHORT NOTICE

Send particulars of your requirements ALWAYS IN STOCK to our Technical Service Dept. IMMEDIATE DELIVERIES

ON AIR MINISTRY LIST Made by the London Platinum Screw Mfg. Co. Ltd. ELCORDIA LIMITED 2 Caxton St., Westminster, London, S .W .I Telephone : ABBEY 4266 July 20, 1945 E l e c t r ic a l R eview 61 AUSTIN WAITERS & SON lTD manufacturers o f STORAGE EQUIPMENT S t r e e t L ig h t in g C o n tro l

Bins and Shelving single and double-sided

STORAGE RACKS for small parts

Removable Trays

ITIHE forms of control for Street Lighting are many and varied, but now CENTRALISED CONTROL is generally accepted as essential. Sordoviso Street Lighting Control TOOL units embodying the Sordoviso non­ CABINETS tilting Mercury Switch with its 39' x 18' x 15" inherent features of non-burning contacts, low energising current, Lock and Key silence in operation and freedom from climatic effects, provide a most efficient remote or automatic control with low installation and main­ tenance costs. If you are contemplating a new scheme or modifications to an exist­ ing one, the advice of our Technical Staff is always available. We should be pleased to forward, on STEEL WORK BENCHES application, our brochure, “ Con­ 8 0" X 2' 6" X 2' 8" trolled Street Lighting.” Two Lockers with Padlock and Key S0RD3VIS0 SWITCHGEAR LTD. AUSTIN WALTERS & SON LTD. Falcon Works, Loughborough Old Trafford, MANCHESTER 16 L O U G H B O R O U G H 3131 62 E le c t r ic a l R ev iew July 20, 1945

FIRTH - VICKERS STAINLESS STEELS FOR RESISTANCE TO CORROSION AND EROSION FIRTH-VICKERS STAINLESS STEELS LTD SHEFFIELD

FOR POST-WAR RADIO USE DU BOIS ‘Plus Quality RESIN CORED SOLDER. Manufactured with Flux continuity HART assured, no bare patches are existent St o r a g e Speedily makes a sound Me­ chanical and B a t t e r i e s Electrical FOR joint E l e c t r ic Lig h t in g a n d Ä.I.O. P o w e r I nstallations APPROVED ■ ' I ? if, I V fi'r'inifi'&lfrf DTD 599

Being used by the Principal British RADIO AND ELECTRICAL EQUIPMENT manufacturers en­ gaged on Air Ministry, Admiralty, . ' BY APPOINTMENT TO H.M. THE KING. and Ministry of Supplied on :— MAKERS OF ACCUMULATORS. Supply contracts. I -lb., 4-lb., 7-lb. and 10-lb. Reels You are Invited to send for details and samples of HART ACCUMULATOR CO. LTD. this special Solder with flux uniformly distributed MARSHGATE LANE, STRATFORD, LONDON. E.15 throughout the whole length. Telephone : MARyland 1361/3 T H E D U BOIS CO. LIMITED Branches at 15 BRITANNIA 8TREET, KING’S CR0 8 8 , W.C 1 Birmingham. Bristol. Cork, Dublin. Glasgow. Manchester Telephone : Terminus 6624/5 Newcastle-on-Tyne • Nottingham end Westminster July 20, 1945 E le c t r ic a l R ev iew 63 Accuracy w ith J Reliability These moving coll Instruments are manufactured from the finest raw materials and assembled with great care to ensure many years of trouble-free and accurate measurement. All these instruments are supplied In black moulded Insulated cases, and mirror scales and illuminated dials are available if required with models 400 and 500. Rectifier or Thermocouple type instruments can also be supplied in all the usual ranges. We a/so manufacture the following instruments :— M O D E L 200. 2 'instrument with either round or square covers. M O D E L 250. 2 Y instrument for flush or projecting mounting.

Send your enquiries to your usual factor or direct to— TAYLOR ELECTRICAL INSTRUMENTS LTD. 419-424, Montrose Avenue, Slough, Bucks. Tel. : Slough 21381 (4 lines). Grams : " Taylins. Slough ” 64 E le c t r ic a l R ev iew July 20, 1945

M E K E L IT E Industrial Lighting Units are available with various lengths of arms and pillar. Bases for 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 Phone-: M tT c h im 3072 C i t i e s M e k c lc k . London

POWER 'TRANSFORMERS of Q U A L IT Y up to 3-5 kVA (A s supplied to H.M. Government) b' THE TRANSFORMER & ELECTRICAL CO. LTD. Ashford Works, Ashford Road South Woodford, London, E.18

Special prices for quantities

REPTO N ENGINEERING COMPANY J f

These approved and certified Conduits and Fittings are consistently reliable under the most arduous conditions TENNANT STREET of service. You can specify none better. BIRM INGHAM , 15, HILDICK &HILDICK WALSALL TUBE WOSKS PLECK ROAD W ALSALL TELEPHONE: MID. 1792/3 TELECRAMS. TONSTILC ondon Stores: 9 Howland Hews West, Howland S t.,W l. Phone: Kuseum 6225 July 20, 1945 E le c t r ic a l R eview 65

N PHAN //////////A

WEATHERPROOF SWITCHES

N 910. 5-amp 250-volt C.l. Switch complete with 3-pole earthed-type plug. N 660 A.

N 900. 5-amp 250-volt C.l. Switch screwed conduit.

SEHHunnsaD.P FOR ALL OTHER PURPOSES STORAGE BATTERIES

The first D.P. battery was introduced in this country in 1 8 8 8 when it was known as the “ Dujardin- Plante.” Since that date the Company has concentrated on the manufacture of batteries for all purposes with the result that to-day, in the minds of battery users everywhere, the letters D.P. are an assurance of sound Design and efficient Performance. % D P BATTERY C? LT? BAKCWtLL. DERBYSMt Phone : BAKEW ELL 81-82 London Office : 50 GROSVENOR GARDENS, S.W.I.______Phone : S LO A N E 6255-6 ] 150 66 E l e c t r ic a l R eview - July 20, 1945 << MICALOSD (Registered) CONTACT RING HOUSINGS W ith Manganese Bronze Rings and Terminals moulded in with “ MICALOID Supplied in thousands to Government Departments, and to over twenty of the most important manufacturers in the Country. Machined t o fine limits. Size V long X 6 ' dia. W e ig h t 11 lbs.

•< M IC A LO ID ” - A LS O — I is Impervious to moisture. MICA, 7 High dielectric and mech­ anical strength. MICANITE, 3 Non-tracking heat resist­ ing (up to 180° Q BAKELITE

4 Produced from our MOULDINGS, “ MICALOID ” moulding compositions. manufac­ etc. tured in our own works.

Mica Manufacturing Co. Ltd., Volta Works, Bromley, Kent Telephone: . Telegrams: RAVENSBOURNE 0118 (3 lines) M1CAMANU, LONDON

BAKELITE MOULDINGS ERINOID T O A N Y TURNINGS SPECIFICATION FREDERICK W. EVANS LTD. PLASTIC WORKS LONG ACRE, BIRMINGHAM 7 TELEPHONE : EASt 1286 Ł 1287

SMALL GEARED MOTOR UNITS Made Unidirec­ tional and Re­ versing. Unidirectional— Torque 36*5' lbs. at 1 r.p.m . R eversing — 60" LIGHTING STANDARDS lbs. at 1 r.p.m . Enquiries are solicited. Fend for Catalogue ER Z20 — u n n e » DRAYTON REGULATOR POLES L.. Birmingham 24 & INSTRUMENT CO. LTD. West Drayton Middlesex July 20, 1945 > E le ct r ic a l R eview 67

We have a LARGE RANGE of TOOL FREE BOBBINS

B a k e l i t e , Cellulose A cetate ,

Polystyrene , E t c .

FRASER & GLASS Ltd. P LAST 1C MOULDERS

HILLSIDE 2224-5 LONDON, N.I2

This photograph shows a group of grey and high duty alloy iron castings produced In our foundry and includes a number we supply to well-known electrical gear manu- NeWman. HenCeT & LO. Ltd facturers. W e have every modern facility ,------stfTvs------1 for_ producing light precision castings for ,7 WOODCHBSTER^W^CLOS. — ------ENCLAND.3 the electrical trade, and shall be pleased.to — quote for your requirements on receipt of drawings and/or samples. 68 E le c t r ic a l R ev iew - July 20, 1945

PHILIPS LAMPS IM P O R T A N T

PRICE REDUCTIONS

REDUCED PRICES for many types on our mailing list. If you have not of Philips Lamps are now in operation. yet received yours, please let us know. The reductions are in many cases sub­ stantial and affect General Lighting Service — clear, pearl and colour sprayed; T raction A FEW OF THE NEW RETAIL PRICES: Single coil, peart or clear and Sign lamps. 100/130 and 200 260 volts 15, 25, 40 & 60 watt I 3 (tax 4d.) = 1/7 Full details of the new prices are given 100 wart 1,9 (tax 6d.) = 2/3 in our leaflet L . 5 17 , copies of which have Coiled-coil lamps will also be available shortly at reduced prices. been sent to all wholesalers and dealers July 20, 1945 E le ct r ic a l R ev iew ( Supplement) 69

IN

sptClAUio f ° 6tS, c0 ^ f , ^ C o O ^

, J ,«..-I' < K " > ' .

X YORKSHIRE LIMITE D NON-FERROUS TUBES MADE ALSO IN SCOTLAND AT OUR BARRHEAD WORKS.

RESISTANCES

Although present circumstances render it difficult for us to give our pre-war service to all customers, we are still work­ ing in their interests. N ew materials and manufacturing pro­ cesses which we are now using to increase output also contribute in large measure to improved performance and reliability of our products. Thus, when normal times return, all users of Berco Resistances will benefit by our work to-day.

THE BRITISH ELECTRIC RESISTANCE CO. LTD. QUEENSW AY, PONDERS END, MIDDLESEX Telephone : Telegrams : HOWARD * I 492 1VITROHM, ENFIELD”

BERCO Vitreous enamelled Resistance 70 ( Supplement ) E le c t r ic a l R ev iew July 20, 1945

Loi-AII Locks are extensively used by Bovt. Depts., Muni- eipalities. Public Utility Cos. and Industry general I y

Sales'Representative : PERCY PHILUPSON 169 Piccadilly, London, W .l Telephone : Regent 1900

Manufactured and Marketed by CONTROL GEAR CELESTION LTD. •^?F?/C/ENCy^ London Road, Kingstoif-on- Thames. Kingston 5656 Products of Integrity ^//liw^

The control panel seen below is working in a foundry where sand and grit abound. For difficult conditions it must be Hannah-built ! READY SOON ! S&otice

VACUUMS LIMITED SUTTON COLDFIELD Telephone: SUT. 3959

Instantly detects faults in Armatures & Coil Our expert advice is at your service. A C or D C. Send for CORONATION ROAD Leaflet BIRMINGHAM, 29 Q 11. RUNBAKEN MANCHESTER! July 20, 1945 E le c t r ic a l R eview (.Supplement) 71 P o w e r IIIIIIIIIIDIIIIIIItlllllllli lining».! iiiTL—.irrc MMniMr: •••':...... — ■ ::: ¡gSSssssssE ...... lin,,,"! uni, ! KaHmiiinniiiiaMuiiii!immiaMÜmn!!!!üüiïü!'iüi'ü2uü£ü '.¡¡¡¡;i The Brltmac Ironclad Indicating Switch Plug rSÜSÜÜünüüSÜSÜÜ'!!!1""...... -ss.!!'!. U n it Illustrated Is Catalogue No. P.4207, and • jj•■ u iiin luii i . . iniiiiiiiiiihiiâïâMiâliiiiiliiîii'iiniîiimiiâiiiiiiiiïïjil, m laniainiiiuiiaaauiaiauiaiiiaiainiiiiiiiniiiiaiaiiiiiiiiiiiii is one of a complete range available. May anaain mammaliiaaaiaiaiaiaiaiiiaiiiiiiiiiiiiiiiiaiaiaiiiiuiiiiaa imaaaaaiaiaiaiaiiiiiaiiimiiaiiiiiaiaiiiiiiia...... ii iiiiiuimiiii lanHiaiiiiiinnaaaaaMUMiaiiiaiauiiaiiiaiaiiMiiiaiiiiiaiiiaiiiiaiiiiimiii'in - • I» ii ii ■■ ii ii nun anaiiiiiaiiiaiiiiiaiiiiiiii luini ■ ■■■... -...... we send you full details?

ELECTRICAL ACCESSORIES FOR ALL WAR-TIME INSTALLATIONS

P 0 I N T S OF PERFECTION

T ele p h o n e : B r It a n n L a Works T ele g ra m s : ACOCKS GREEN Wharfdale Rd. Tyseley HECTOMAR 1642 sLines BIRMINGHAM 11 BIRMINGHAM ARC DURATION (HALF CYCLES) nur fr ulr eal fo : from details fuller for Enquire A M y h A 66 fheby OA C R E F Pre-eminent Pre-eminent xasietss ae rvd tt b a rae o usadn merit outstanding of Breaker a be to it proved have tests Exhaustive 2 ( 72 Air-blast Air-blast BIRMINGHAM phone n o h 'p class ! the In N C H E S T E R , 11 , R E T S E H C N Supplement

RYSE 1301(8 DROYLSDEN dfel ld fie ld o C n o t t u S 1 Electrical l a c i r t c e l E ) SN LI MI D E IT IM L IN IL A P TSON,

i ) s e lin 74 AS Central 5060 : W O SG LA G 2744 U BLAST DUO / T * \ IC T R E K A E R B IT CIRCU R iew v e D N A L G N E

LONDON: e Bar 81 /2 8711 r a B le p m e T AAIY ) % ( CAPACITY ______July 0 1945 20, ______service 66 kV _ KEEP OUTPUT UP -WITH c R o m P T o n p ra p o f* [RULES

CROMPTON PARKINSON LIMITED, ELECTRA HOUSE, VICTORIA EMBANKMENT. LONDON, W.C.2 Telephone: TEMpte Bar 5911 Telegrams: Crompark, Bstrand, London 74 ( Supplement) E l e c t r ic a l R ev iew July 20, 1945

REDUCED PRICES Q s r a m LAMPS From JULY 16* 1945 GENERAL LIGHTING SERVICE LAMPS

COILED-COIL p e a r l

Standard Voltages (200-260) s. d. 40 watt ...... 1 6 *60 watt ...... 1 8 *75 watt ...... 1 8 *100 watt ...... 1 1 0

* A vailable shortly

SIN G LE C O IL PEARL & CLEAR

Standard Voltages (100-130 & 200-260) s. d. 15 and 25 w a n ...... 1 3 40 and 60 watt ...... 1 3 75 watt ...... 1 2 100 watt ...... 1 9 150 watt ...... 2 9 CLEAR 200 watt ...... 4 6 300 watt ...... 8 0 500 watt ...... 1 0 6

Prices do not include Purchase Tax.

W rite fo r Price List O S 9759 w hich gives fu ll particulars o f a ll price reductions.

Announcement of The General Electric Co., Ltd., Magnet House, Kingstoay. London, W .C .3 July 20, 1945 Electrical Review (Supplement) 75 -CLASSIFIED ADVERTISEMENTS-

A D V E R T IS E M E N T S for insertion in the following R E P L IE S TO advertisements published under a Friday’s issue are accepted up to F irst P ost on Box Number if not to be delivered to any particular M onday, at Dorset House, Stamford Street, London. S .E .l. firm or individual should be accompanied by instruc­ tions to this effect, addressed to the Manager of the T H E C H A R G E for advertisements in this section ELECTRICAL REVIEW. Letters of applicants in is 2/- per line (approx. 8 words) per insertion, such cases cannot be returned to them. The name minimum 2 lines 4/-, or for display advertisements of an advertiser using a Box Number will not be 30/- per inch, with a minimum of one inch. Where disclosed. All replies to Box Numbers should be the advertisement includes a Box Number there is addressed to the Box Number in the advertisement, an additional charge of 6d. for postage of replies. c/o ELECTRICA L 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 testimonials should not be sent with applications for employment.

OFFICIAL NOTICES, SITUATIONS VACANT TENDERS, ETC. None of the vacancies for women advertised in these columns relates to a woman between 18 and 40 unless such CITY OF CHICHESTER woman (a) has living with her a child of hers under the o] 14, or (6) is registered under the Blind Persons Acts, Contract No. 35 for Cables and Cable Laying or (cj has a Ministry of Labour permit to allow her to obtain em/ployment by individual effort. HE Council of the City of Chichester invite tenders T from experienced contractors for the manufacture, BOROUGH OF STOCKTON-ON-TEES supply and laying of approximately 20 miles of 11-kV and control cables and accessories. Specifications, plan Electricity Department and form of tender may be obtained on application in writing to the Consulting Engineers, Messrs. Mackness & Shipley. Parliament Mansions. Abbey Orchard Street. Assistant Mains Engineer London, S.W .l. All applications must be accompanied by a deposit of two guineas, returnable on receipt of a A PPLICATIONS are invited for the above appointment bona-fide tender. from qualified electrical engineers with sound tech­ Tenders, in plain sealed envelopes, endorsed “ Tender nical training and experience in the Mains Department of for Electrical Contract No. 35.” must reach the under­ an Electricity Supply Undertaking. signed at the Municipal Offices, North Street, Chichester, The appointment will be subject to the provisions of not later than noon on Friday, August 17th, 1945. the Local Government Superannuation Act. 1937, and the The Council do not bind themselves to accept the lowest selected candidate will be required to pass a medical or any tender. examination. E R IC BANKS. Town Clerk. The salary and conditions of employment will be in accordance with the N .J.B . Schedule, Class F. Grade 8a. ______2302 at present commencing at £371 per annum. Applications, stating age, marital state, training and CITY AND COUNTY BOROUGH OF BELFAST qualifications, details of past experience, present appoint­ ment, etc., together with copy of testimonials, should be Electricity Department forwarded to Mr. N. Hunter, M .I.E.E., General Manager and Engineer, Corporation Electricity Offices, Bishopton rpEN D ERS are invited for supply, delivery and erection Lane, Stockton-on-Tees, not later than the 30th July. 1945. of (a) Carbon Dioxide Fire Extinguishing Equipments Permission has been obtained to advertise this vacancy for Electrical Substations (Specification No. G.49) acd which has been approved by Division A.9 (D) of the (b) Replating Regulating Cells of Storage Battery (Speci­ Appointments Department. fication No. G.51). N. HUNTER. M.I.E.E.. Forms of tender may be obtained from the City Elec­ General Manager and Engineer. trical Engineer and General Manager, East Bridge Street. Corporation Electricity Offices, Belfast. Bishopton Lane, Stockton-on-Tees. Each tender, in sealed envelope marked “ Tender for 4th July. 1945. 2312 Electricity Department,” and endorsed with the name and address of the person tendering, must be lodged with the undersigned not later than 4 p.m. on Friday, 3rd August. BOROUGH OF DARWEN 1945. An official receipt must be obtained for every tender Electricity Department delivered by hand. Tenders sent by post should be registered. Appointment of Mains Assistant JOHN DUNLOP. City Hall. Belfast. Town C le rk ^ PPLICANTS for above position must have had sound A technical training and be experienced in work on the layout, connection and maintenance of E.H .T. and L.T. BOROUGH OF LOWESTOFT distribution systems, including substations. Experience in change-over work will be an added recommendation. Electricity Department Salary will be in accordance with N .J.B . Schedule. Class C, Grade 8 (commencing £329 per annum), with rpH E Council of the Borough of Lowestoft invites possible increase due to reclassification in the near future. tenders for the supply and delivery of L.T. 4 and The successful candidate will be required to pass a 5-core P.I.L.S.S.T.A . Cable. medical examination and contribute to the Council's Applications for specifications should be addressed to Superannuation Scheme. Borough Electrical Engineer and General Manager, Elec­ Applications, giving full details of age. training and tricity Works, Norwich Road, Lowestoft. 4 Tenders, experience, together with copies of three testimonials, are enclosed in plain sealed envelopes, endorsed “ Tender for to be endorsed ” Mains Assistant,” and must reach the Cable.” should be addressed to the undersigned, by whom undersigned by Monday, Ju ly 30th. 1945. ' they are to be received not later than first post on Thurs­ The Ministry of Labour and National Service, A9D.. day, 26th Ju ly, 1945. , have given permission under the Control of Engagement The Council may. at their option, accept the whole or Order. 1945, for the advertisement of this vacancy. part of any tender, but in either case do not bmd them­ selves to accept the lowest or any tender. ALEX WATSON. A.M.C.T.. A.M.I.E.E.. (Signed) F. B. NUNNEY. M .A ^ Borough Electrical Engineer. Electricity WTorks. Town Hall. TowD aer£ ; „ Robin Bank Rd.. Darwen. 2354 Lowestoft. 2357 76 (Supplement) E l e c t r ic a l R eview July 20, 1945

METROPOLITAN BOROUGH OF ISLINGTON CITY OF WINCHESTER

Appointment of Engineer and General Manager, Electricity Department Electricity Undertaking Control Engineer T ^ H E Council invite applications for the position of Engineer and General Manager of their Electricity A PPLICATIO NS are invited for the above appointment Undertaking from corporate members of the Institution (working a shift rota) at a salary in accordance with of Electrical Engineers experienced in the management Grade 8a. Class D. of the National Joint Board Schedule and administration of an Electricity Undertaking. Cor­ (at present £329 per annum). porate membership also of the Institution of Civil Engi­ Candidates should have a technical knowledge of alter­ neers or the Institution of Mechanical Engineers would be nating current transmission and distribution, and some an advantage. The salary for the position will be in experience with an Electricity Undertaking in the opera­ accordance with the agreement made by the National tion of a high voltage ring main transmission system Joint Committee of Local Authorities and Chief Electrical supplying transformer suhstations. together with the Engineers, dated 9th Ju ly. 1941, and in accordance with operation and maintenance of modern cable protective Clause 10 of the agreement the salary for the first year systems and high voltage switchgear. will be 85% of the full salary, and for the second year The appointment will be subject to the provisions of 92£% thereof, the full salary being payable in the third the Local Government Superannuation Act. 1937. and the and subsequent years. The approximate salary for the successful candidate will be required to pass a medical financial year ending 31st March. 1946. is £1.683 2s. In examination. addition a temporary cost-of-living bonus is payable in Applications, giving particulars of age. training and accordance with the recommendations of the Whitley experience, and* accompanied by copies of any recent Council, and at the present time the bonus amounts to testimonials, should be addressed to the City Electrical £33 16s. per annum. A motor car will be provided and Engineer. Electricity Department. Gordon Road. Win no car allowance will be payable. Chester, and be received by him not later than the 30th The appointment will be determinable by three months’ July. 1945. notice on either side and will be subject to the provisions The Ministry of Labour and National Service. A9vD>. of the Local Government Superannuation Act. 1937. and have given permission under the Control of Engagement to the successful candidate passing satisfactorily an Order. 1945. for the advertisement of this vacancy. examination by the Council’s Medical Adviser. F. W. KEMPTON. Applications on the forms provided and enclosed in an G u ild h a l l, Town Clerk. envelope endorsed “ Engineer and General Manager” must Winchester. 2389 reach the undersigned not later than 11th August. 1945. Canvassing directly or indirectly will be a disqualification. W. E R IC ADAMS. COUNTY BOROUGH OF PRESTON Town Hall. Town Clerk. Upper St.. Islington. N.I. Electricity Undertaking 13th July. 1945. 2380 Assistant Power Station Chemist THE MADRAS ELECTRIC SUPPLY CORPORATION A PPLICATIO NS are invited for the position of Assistant LIMITED Power Station Chemist from suitably qualified persons (male or female). Candidates must have had 31, Kingston Road. Leatherhead. Surrey experience with coal testing, gas analysis and boiler feed water treatment. Preference will be given to applicants A PPLICATIONS are invited from candidates for the who have had previous experience in a large Power Station. following appointments:— The salary and conditions of service will be in accordance with the National Joint Board Schedule, the salary being JUNIOR SHIFT ENGINEER, for steam turbine A.C. as per Class J . Grade 9a (at present £349-£365 per annum). Generating Station, preferably one trained in a manu­ The selected candidate will be required to p a s a medical facturers’ works and with maintenance experience. examination and contribute to the Council's Superannua­ Salary. Rupees 800 (at present £60) per month for first tion Scheme under the provisions of the Local Govern­ year. Rs. 850 per month for second year. Rs. 900 per ment Superannuation Act. 1937. month for third year. Applications, stating age. and giving full particulars of MAINS EN G IN E E R , with experience in A.C. and technical qualifications and experience, accompanied by D.C. distribution and in maintenance of H.T. and L.T. not more than three testimonials, are to be endorsed Cables. Salary. Rupees 800 (at present £60) per month “ Assistant Chemist” and received by the undersigned not for first year. Rs. 850 per month for second year. later than Saturday. 4th August. 1945. Rs. W0 per month for third year. The Ministry of Labour and National Service. A9(D). The appointments would be on a three-years agreement, have given permisión under the Control of Engagement free passages to and from Madras would be provided, and Order. 1945, for the advertisement of this vacancy. the officers would, in addition to salary, receive free G. A. ROBERTSON. Quarters or a house allowance in lieu of free quarters, M.Sc.(Tech.). M.I.E.E.. A.M.I.Mech.E.. and a cost of living increment, at present R s. 100 per Borough Electrical Engineer. month. A Staff Provident Fund exists, to which both : 40/41. Lune St.. Preston. staff and the company contribute. July. 1945. 2385 Applications, stating age of applicant, whether married or single, and giving particulars of experience, to be sent to the company at the address stated above. THE LANCASHIRE ELECTRIC POWER COMPANY 6th July. 1945. 2355 Generation Department MANAGER Appointment of Technical Assistant and Boiler MANAGER required by progressive Electrical Whole­ House Superintendent A salers (East Anglia) who have considerable scope for development. Successful applicant should be go-ahead, A PPLICATIONS are invited for the position of TECH enthusiastic, capable of developing business given initia­ NICAL ASSISTANT, to deal with the statistical and tive. and to ultimately become Director (finance not technical work of the Generation Department of the above required). , , , .. ! Company. This is an exceptional post, suitable for an energetic Also for the position of B O ILER HOUSE SU P E R ­ man (under 45) of exceptional business building ability, INTENDENT at Kearsley Power Station, to take charge who is prepared to take control of a small, well-financed of the operation and to supervise the maintenance of the busine« with good connections, and build up a life interest. boiler plant. Previous experience as Manager not important, but The salaries will be dependent on experience and knowledge of electrical wholesale trade and buying essen­ J capability. tial: trade connections an advantage. , . The Ministry of Labour and National Service. A9(D). This post involves plenty of prospects and plenty of ; have given permission under the Control of Engagement 1 Order. 1945. for the advertisement of these vacancies. ha^ e D * S f‘which will be treated in strictest confidence, Applications should be sent in not later than 31st July. should state experience, age. suggested commencing salary. 1945. to The Engineer. Generation Department. Kearsley —Box 7323. c/o The Electrical Review. • Power Station. Stoneclough. nr. Manchester. 2384 July 20 194s i- Electrical Review (Supplement) 77 OLDHAM EDUCATION COMM.TTEE ELECTR.CAL ENG.NEER AND MANAGER

- ? “ n'cipal Technical College Principal: R. S. Hadlow. B.Sc.(Eng.)Lond.. A.M.I.Mech.E. R Evil IKED for eventual service in Far East, having good experience electrical contracting, cable laying, etc.. capable organising and managing large contracting ~A P T M E F r r i • RR £rRlnVH R - duties *?- fpr to ,he commence post of on FU L1 Lst ' ^tem b er. 194a. or as soon as possible after that date business. Reply. i„ flr5t instance with full particulars of Candidates should-Pasese either a degree in Mathematics experience, to—Box 2391. c/oThe Electrical Review. cr one m which Mathematics was a subject of the final exammafcon. ability to teach an additional subject being a desirable but not an essential qualification The post is a pennanent one and the duties will include teaching day and evening classes in the Departments of Engineer­ SSISTANT General Manager required by firm special ing and science. including Cadetship and Intensive“ Engi­ m ^ e9}ricai repairs and maintenance. Applicants neering Courts up to the standard of the Higher National - heId ,e;secutiTe position and have practical Certificate, Salary will be in accordance with the Burn­ 5 er‘ence ^ works administration, factory costs, etc.. ham Scale and previous teaching experience is desirable. ana be familiar with the design and construction of elec­ Further particulars may be obtained from the under­ trical machines. Age not over 45. The successful appli signed. together with forms of application, which should cant would be required to pass a medical examination be completed and returned immediately. and to become a member of the Staff and Widows* Pen­ sion Scheme.—Box G1847. W. H. Smith & Son Ltd.. MAURICE MARK ISON. Manchester. 3. 2364 Education Offices. Director of Education. Oldham. X )O Y S or Girls required to learn Elect. Inst, making. ^ Apply— W. C. Davey & Co.. ISO. Tottenham Court 9th July. 1945. 2358 Road. W.l. 2318 /CLERICAL Assistant. Class A. Ex-Serviceman, for COUNTY BOROUGH OF ROTHERHAM Stores Office. Must have thorough knowledge of all electrical material. Apply—London Electrical Company, 92. Blackfriars Road. S .E .l. 2324 Generating Station Superintendent /CONTRACTS Manager required by company in the East ^ Midlands carrying out electrical contracting work. A PPLICATIONS are invited from qualified engineers for Recent technical and commercial experience with elec­ •¿A- the position of Generating Station Superintendent trical contracting industry essential. Commencing salary The salary will be in accordance with Grade 3. Class J. £400 per annum, plus war bonus. Superannuation scheme. of the National Joint Board Schedule, at present £724 Applications, stating age. present position and details of to £759. training and experience, to be sent to—Box 2360. c/o The appointment will be subject to the provisions of the The Electrical Review. Local Government Superannuation Act. 1937. and the T A R AUGHTSM A N required for Electrical Machines. successful candidate will be required to pass a medical North Kent district. State experience and salary examination. required. Applicants should be over 51 years of age. Applications, stating age and giving particulars of Class A ex-service men. or otherwise exempt from M.O.L. education, training and experience, accompanied by copies control.—Box 23S3. c/o The Electrical Review. of not more than three testimonials, should be endorsed U L E C T R IC A L Engineering Firm near Glasgow require “ Station Superintendent.'' and addressed to the Borough -A-* a Foreman with first-class experience to take com­ Electrical Engineer. Electricity Works. Rotherham, so as plete charge of Plating and Polishing Shop. Salary £550 to arrive by Sth August. 1945. p.a., according td qualifications and experience. Applica­ The Ministry of Labour and National Service. A.9(D). tions. which must be in writing, should state date of birth have given permission under the Control of Engagement and full details of qualifications and experience (including a list, in chrononlogical order, of posts held). Address— Order. 1945. for the advertising cf this vacancy. 2376 " 0571.” Wm. Porteous i Co.. Glasgow. 2382 T^LEC T R IC A L Engineering Firm near Glasgow require SURREY EDUCATION COMMITTEE -A-i a Foreman with first-class experience of Pressure Die Castings, to take complete charge. Salary £550 p.a., according to qualifications and experience. Applications, Kingston Technical College which must be in writing, should state date of birth and full details of qualifications and experience (including a DEQ U EUED to commence duties on 1st September, a list, in chronological order, of posts held). Address— ' Graduate Lecturer in Electrical Engineering for “ 0572.” Wm. Porteous & Co.. Glasgow. 2381 Electrical Engineering Subjects to Higher National Certi­ XT'LECTRICAL Engineer required for the estimating and ficate standard. Corporate membership of the Institution A -i contracts department of a British firm in India, age of Electrical Engineers essential. 23 (28. single, with sound technical education and works The salary will be the Burnham Graduate Scale training. Write, stating age. fullest particulars and copies <£315-15-£555) with placing according to industrial and of testimonials, to—Box ZZ.477. Deacons. 36. Leadenhall teaching experience. Street. London. E.C.3. 2372 Forms of application, which should be returned as soon XpN GD sEER/Tester required (Croydon area). Must be as possible, may be obtained from the undersigned on A-^ fully experienced (practical) in D.C. generators receipt of a stamped addressed envelope. driven by petrol and diesel engines Ihigh speed) and able J . W. ARCH ER. B.Sc.. to carry ont any necessary adjustments, etc. Highest Principal. priority work and ample post-war prospects. Good rate ______2341 of pav. Applications from those over 51 or from Class A ex-service men only. Full details of previous experience to—Box 7327. c/o The Electrical Review. WATSON & SONS (ELECTRO-MEDICAL) LIMITED T ONDON firm of electrical contractors require Manager. -Li Must have thorough knowledge of trade. Own car an 4 PPLICATIONS are invited for senior appointments on advantage. Good prospects to live man. Write, stating our sales staff after the present M.O.L. restrictions age. experience and salary required, to Box 2365. c/o bare been removed. For those possessing initiative, a The Electrical Review. eood personality and knowledge of X-ray equipment there ANAGER for Rectifier Department, experienced in are exceptional opportunities. M design of transformers, metal, valve or mercury arc Write in confidence in the first instance, giving details rectifiers. Applicant must be free from Control of Engage­ of experience and age. Interviews will be arranged later ment Order. 1945. Good salary offered for the right man. a London. Write, stating age. experience and salary required, to— Box 23S6. c/o The Electrical Review. WATSON & SONS (ELECTRO-MEDICAL) LIMITED. ANAGER required, with general experience in the Temporary Head Office: 76. Castle Street. Reading. M manufacture of lead storage batteries. State ex- 2263 pt-rience and salary required.—Box 2376. c/o The Elec­ trical Review. SSISTANT Designer with previous experience re­ ANUFACTURERS of Telepliones and Small Electri­ quired for Electrical Motor Manufacturers. State M cal Apparatus require Draughtsman. Class A ex- Permanent progressive position. Applicants should service men only. Junior, under IS. not objected to. but orer 51 or Class A eï-sernee men only Apply— some experience essential.—Box 2377. c/o The Electrical gs Motors Limited. W]tton. Birmingham, 6. 23.9 Review. 78 ( Supplement) E l e c t r ic a l R ev iew July 20, 1945

LANNING Engineer to take charge of planning depart­ TT’LECTRICAL Engineer, German refugee. University P ment and jig and tool drawing office. Must be first- training. 30 years’ experience consulting power- class jig and tool designer having good all-round experience stations, high tension and factory installations, seeks with mass production, particularly on small mechanisms position.—Box 7302, c/o The Electrical Review. utilising press work, auto parts and bakelite mouldings. TT'LECTRICAL Engineer (24), student I.E.E. up to B.Sc. Only Class " A ” ex-service man accepted until present standard, experience in design, manufacture and testing restrictions removed. Good salary offered for right man. of electric motors, also knowledge of French and German, Write, giving age, salary expected, experience, etc., to— seeks change of post providing scope for initiative and Box 2345, c/o The Electrical Review. organising ability.—Box 7274, c/o The Electrical Review. E PR E SE N TA T IV E required by wholesalers. Electrical LEC TRIC A L Test Engineer (27), on release from M.N., R knowledge essential. Applications from those over desires progressive post with transformer manufac­ 51 or from Class A ex-service men only. State experience, Eturers or similar concern. Six years’ experience in salary required, and send copy of testimonials.—Box 2375. assembling, erecting and testing all types of power and c/o The Electrical Review. H.T. units. Write—Box 7324, c/o The Electrical Review. A LES Engineer required by old-established concern of T^NGINEER. aged 25, Grad. I.E.E., Grad. I.Mech.E.. S Electrical Condenser Manufacturers, to take charge seeks appointment with electricity supply .under­ of industrial sales, particularly condensers for power factor taking. 8 years’ experience, manufacture of A.C. and D.C. correction. Applications from those over 51 or Class A machines, official tests of generator sets, motors and ex-service men only. Full details of commercial and switchgear.—Box 7330. c/o The Electrical Review'. technical qualifications and experience, age, salary re­ N G IN EER , Mechanical and Electrical, desires position quired. etc.. to—Box 23-78, c/o The Electrical Review. as Works Manager with reputable firm engaged on A LES Manager, male or female, for electrical and radio Einstruments, radio, clocks, communications or F.H .P. S showroom 16 miles north of Charing Cross.—Box 7321. motors. Advertiser experienced in modern methods and c/o The Electrical Review. machine tools, also planning, estimating, time study, rate ELL-known Electrical Engineering Company have fixing, tool design and work layout, small or large quan­ W vacancies for suitable lads, under 18 years of age. tities; 15 years administrative includes works and produc­ with matriculation or general school certificate, for tion manager. Age over 40. Any firm desiring to go apprenticeship in the above industry. Good rates of pay straight ahead with its peace-time programme on common and living accommodation provided.—Box 2245, c/o The sense lines and prepared to pay a minimum salary of Electrical Review. £1,000 please communicate with—Box 7277, c/o The IREM AN wanted, London, over 51 or otherwise free Electrical Review. W to take position. Best conditions. Reply—Box 2344. T^X-Merchant N avy Electrical Engineer, at present c/o The Electrical Review. . foreman electrician M .A.P. factory, seeks service -ray and Medical Engineer required for Scotland. agencies for North Wales and/or Merseyside areas. Wide State age, experience and salary required. Good experience on " trouble shooting ” and maintenance of X prospects for right man.—Box 263. McCallum & Co.,domestic, industrial and marine equipment. British and 42. North Bridge, Edinburgh. 2392 American. Age 4Q. married, car owner, will travel for interviews.— Box 7298, c/o The Electrical Review. TT'XPORT Representative (38), A.M.P.O.A., widely APPOINTMENTS FILLED travelled Continent and Overseas, fluent French. Dissatisfaction having been so often expressed that un­ German. Italian, Spanish, keen, energetic, own car, seeks successful applicants are left in ignorance of the fact that progressive post with firm expanding export trade. Replies the position applied for has been filled, may we suggest —Box 7334, c/o The Electrical Review. that Advertisers notify us to that effect when they have T^X-service man (Class A), prof. el. engineer, with wide arrived at a decision? We will then insert a notice free experiennce in high and low voltage machinery and of charge under this heading. and installations of all kinds, seeks appointment or part­ nership with el. contractor or consulting engineer firm.— /C E N T R A L Sussex Electricity Ltd.—Senior Clerical Box M.37, Scripps’s, South Molton st.. W .l. 7339 ^ Assistant; Dundee Corporation—Junior Assistant Mains Engineer. RAD U ATE I.E .E ., aged 29. captain in Royal Engi- neers, free in October, seeks technical or administra­ tive post with prospects.—Box 7329, c/o The Electrical SITUATIONS WANTED Review. CCOUNTANT (36). 20 years’ varied and extensive ~ \ T AINTENANCE Electrician, disengaged, seeks berth. A practical experience with eminent London chartered competent all branches.—Box 7316. c/o The Elec­ accountants (final figures, taxation, secretarial duties, trical Review. costings, etc.). desires responsible Secretary-Accountant 1\/TAN (36), 16 years’ design and production engineering position with commercial firm.—Box 7269, c/o The Elec- experience, desires change to outdoor work, in con­ nection with electrical installation or agricultural imple­ DVERTISER (21). Higher Nat. Cert., City & Guilds ments.— Box 7304. c/o The Electrical Review. A Final, 5 yrs.’ engineering apprentice, desires a post in RODUCTION Engineer (38) desires change in similar electronics, radio or sound reproduction. Exempt military P capacity, 22 years’ planning, D.O., time study, tool service.—Box 7337, c/o The Electrical Review. room, T.D.O. and shop experience on light elect./mech. .M .I.E.E. (30), now disengaged, desires position tech­ products. Salary £650/£700. London. Surrey or Middle­ A nical/administrative/research. Wide experience in­ sex.—Box 7273. c/o The Electrical Review. dustrial applications.—Box 7336, c/o The Electrical WITCH and Control Gear (E.H .T., L.T. and Contactor) S Instruments and Meters. Advertiser (55) has occupied .Sc.Eng. (E. and M.), A.M.I.C.E., age 39. Switchgear positions of general, sales and works manager, requires and Distribution Engineer, experienced in the design administrative position, connection with corporations, ofB power and telecommunication equipment, desires execu­ public supply companies, large industrial users and ship tive post.—Box 7317, c/o The Electrical Review. pers throughout U .K . Manchester 20 years, London 10 .Sc.Eng. (Hons.) (23), exempt, inventive, wide experi­ years. Efficient organiser small works.—Box 7291, c/o ence transformer and switchgear testing and com­ The Electrical Review. B missioning and experimental work, seeks post with better prospects, London area.—Box 7288, c/o The Electrical FOR SALE Review. /C A P A B L E Engineer (32), experienced, works installa- Traders buying and selling hereunder must observe the tions. application of electric motors, sales, works Restriction of Resale Order. S. R. & O. 1942 No. 958. procedure, office administration, will consider responsible progressive position with mediura-size concern. Own car. London or South. Alternatively partnership with small ELECTRIC MOTORS AND DYNAMOS investment.—Box 7303, c/o The Electrical Review. TT'LECTRICIAN requires job as permanent Maintenance W / ’E hold one of the largest stocks of New and Second- -t-J Hand, good references.—Box 7332, c/o The Elec­ hand Motors. Secondhand machines are thoroughly trical Review. overhauled. Inspection and tests can be made at our TT'LECTRICAL and Mechanical Engineer, M.Sc., expert. Works. electrical instruments, motors, generators, also A.C. commutator machines. 16 years’ experience, seeks suitable For Sale or Hire. Send your enquiries to: — position.—Box 7335. c/o The Electrical Review. LECTRICAL Engineer, exempt. 20 years’ exp. BRITANNIA MANUFACTURING CO. LTD.. research-design-manufacture of el. apparatus, domes­ 22-26, BRITANNIA WALK. E tic and heating, temperature control, inventive abilities, CITY ROAD. LONDON. N.I. organizer, seeks position.—Box /300, c/o The Electrical Review. Telephone: 5512-3 Clerkenwell. 13 July 20, 1945 E l e c t r ic a l R ev iew ( Supplement) 79

CITY OF WINCHESTER G EO R G E CO HEN, SONS & CO. LTD.

Electricity Department for rrtH L following surplus material is available for GUARANTEED ELECTRICAL disposal:— PLANT. Two 75-kVA. oil-cooled, three-phase. 50-cycle trans­ formers. ratio 11.000/6.750 volts (at no load), with H.V. MOTORS. GENERATORS. off-load tappings 2\/Q and 5% plus and minus. Each transformer is mounted on rollers and manufactured by SWITCHGEAR. the English Electric Co. L td .; One oil storage equipment consisting of four rectangular etc. 100-gallon steel tanks; each tank equipped with self- measuring pump to deliver up to one quart by half-pints; large manhole with locking cover and wire mesh strainer, etc. The four tanks are in one unit equipped with a WOOD LANE. LONDON. W.12. barrel track fitted on top. with hinged cradle to facilitate hoisting barrels. M akers:—Dowson Mason Gas Plant Telephone: Shepherds Bush 2070 Co. Ltd.. Manchester; and Two high-speed steam engine indicators with springs STANNINGLEY, NEAR LEEDS. calibrated 120. 60 and 20 lbs. per sq. inch, in polished wood case. Makers:—Crosby Steam Gauge & Valve Co. Telephone: Pudsey 2241. Ltd.; Established 1834. One “ Murday ’ portable moving coil recording volt­ meter in polished wood case, range 190-250 volts. Makers :—Evershed & Vignoles L td .; Two “ Murday " switchboard pattern recording volt­ REBUILT MOTORS AND GENERATORS meters. range 180-260 volts. Makers l—E vershed & Vignoles L td .; One “ Murday ” switchboard pattern moving coil T ONG deliveries can often be avoided by purchasing ammeter, range 0-300 amperes, complete with external rebuilt secondhand plant. We can redesign or replace shunt. Makers :—Evershed & Vignoles Ltd. surplus plant of any size. Offers, in writing, should be submitted to the City SEND US YOUR ENQUIRIES. Electrical Engineer, Electricity Department. Gordon Road. Winchester. 2390- OVER 1.000 RATINGS ACTUALLY IN STOCK HERE.

METROPOLITAN BOROUGH OF HACKNEY DYNAMO & MOTOR REPAIRS LTD., Wembley Park, Middlesex. Electricity Department Telephone : Wembley 3 12 1 (4 lines). rp H E Borough Council invite offers for the purchase of Also at Phoenix Works, Belgrave Terrace, Soho Road. -*- the machines described hereunder :— Handsworth, Birmingham. Peebles-La Coeur Motor Converters. One 1.500 kW Telephone: Northern 0898. and two 500 kW, 6.000 volts. 3-phase. 50 cycles to 26 500/550 volts D.C. Stator and rotor of 1.500-kW machine require repair. 500-kW machines in run­ ning order. All complete with D.C. Control Panel quantity of nearly new Storage Cells by Young, 350- and starting equipment. A amp.-hour capacity at 10 -hour rate, heavy duty, Also Four 1,000-kVA single-phase oil-immersed type only a few weeks old. fully charged. Further quantity of Transformers, 50 cycles. 6.070/3,460 volts. new Cells, 100-amp.-hr. cap. Full details from—G.P.U. Ltd.. Wembley. 2368 The above can be viewed on application to the Borough .C. and D.C. House Service Meters, all sizes, quarterly Electrical Engineer. 18/24, Lower Clapton Road, E.5. A and prepayment, reconditioned, guaranteed one year. Telephone, Amherst 2361. Repairs and recalibrations.—The Victa Electrical Co., 47. Your offer to be made by letter addressed to the lown Battersea High Street. S .W .ll. Tel. Battersea 0780. 19 Clerk, Hackney Borough Council. Town Hall, Hackney. .C. and D.C. Motors, all sizes, large stocks, fully E.8. 2371 A guaranteed.—Milo Engineering Works. Milo Road. East Dulwich, S.E.22 (Forest Hill 4422). 6781 .C./D.C. Gen. Set. input 200/1/50. output 3 volt. WATER TUBE BOILERS IN STOCK A 100 amp., on bed, overhauled, from stock.— The Electroplant Co., Wembley, Middx. 2369 Two 25.000 lbs. evaporation, 250 lbs. W.P. .C. Motors, l/50th h.p. to 10 h.p., from stock. Also Two 25.000 lbs. .. 175 lbs. A D.C.—The Johnson Engineering Co., 86. Great Port­ Three 20.000 lbs. .. 175 lbs. land Street. London, W .l. Tel. : Museum 6373. 57 One 12.000 lbs. .. 200 lbs. \ E R IA L Cables, all sizes quoted for; good deliveries One 12,000 lbs. .. 160 lbs. - against Government contract numbers.—Edwardes One 9/10.000 lbs. .. 200 lbs. Bros., 20, Blackfriars Road, London, S .E .l. 7340 EST English Cables. 1/.044 up to 127/.103. deliveries We install complete, including brickwork. Economisers. against M.O.S. requirements.—Edwardes Bros.. 20. Pumps, Piping Valves, Generating Sets and Motors in B Blackfriars Road, London, S .E .l. 7341 stock. Please send us your enquiries; we can give .I.C. Feeder Pillar. 6-way arm. cable entry boxes, suit immediate delivery. B links or fuses, up to .20 cable; G.E.C. 200-amp. Oil Breaker with three 200/5 current transformers fitted volt RURFORD, TAYLOR & CO. LTD., meter. 0/500 v. Also approx. 100 yds. 3-core 7/064 Lead Boiler Specialists. Middlesbrough. Sheath Braided Cable. All nearly new. £50 the lot.—Pannal Garage (Harrogate) Ltd.. Harrogate. Tel. 81764. 2367 Telephone; Middlesbrough 2622. ARBONS; large stocks assorted sizes, solid and cored. _ _ C Edwardes Bros.. 20. Blackfriars Road. London. S .E .l. 7342 FOR .C. 220-volt Motors. 3 h.p. to 10 h.p.. various speeds. HYDRAULIC PLANT, PUMPS, PRESSES, D —City Electrical Co.. Emerald St., W .C.l. 2285 ELECTRICAL PLANT AND TT'XHAUST Fans. new. 14". 1-phase. 200/250 v.. 1.900 POWER PLANT OF ALL J - J cu. ft./min.. £ 11 15s.—Southern Ignition Co. Ltd.. DESCRIPTIONS 190. Thornton Road, Croydon. 75 r 'l ENERATING Sets for sale. 18 kVA, 400/3/50. petrol; send your enquiries to 2£-kW, 220-v. D.C. Crude Oil Set.—Fyfe. Wilson & Co. Ltd., Bishop's Stortford. 2387 THOS. w. WARD LTD., NSU-Glass covered Plain or Enamelled Instrument Brettenham House. Strand. London, W.C.2. I Wires. No. 18 s.w.g., No. 40 s.w.g., stock deliveries.— Temple Ear 9631. 2220 Saxonia, Roan Works, Greenwich, S.E.10. 29 80 (;Supplement) E l e c t r ic a l R ev iew July 20, 1945

T A R G E quantity of secondhand Refrigerator and Wash- Q WITCH and Fuse Units, Conduits and fittings, works ing Machine Motors, various voltages. Particulars ^ requirements stocked.—Edwardes Bros., 20, Black­ from—S. Caplan & Sons Ltd., 447 Hackney R d .,E .2. 7320 friars Road, London, S.E.l. 7347 T ATEST type Slipring Motors by Crompton Parkinson. HPRAILER-mounted. petrol-driven. 5-kW, 220-v. D.C. wound for 400 volts, single-phase, 50 cycles supply, Generator, complete with switchboard, £160. Apply enclosed ventilated machines with end-shield ball bearings; —Manager, Great Northern Telegraph Co. Ltd.. 31, Mosley each complete with stator and rotor starter, with no-volt Street, Newcastle-on-Tyne, or Company’s London Office. and overload releases. One 50-h.p., 585-r.p.m., 3-bearing 5. St. Helen’s Place. E.C.3. 7333 machine. Three 20-h.p., 960-r.p.m., 2-bearing machine. RAN SFO RM ER Lead-in Wire, 7/38 and 14/38 s.w.g., —George Cohen, Sons & Co. Ltd.. Wood Lane, London, T Insu-Glass finished, various colours, stock.—Saxonia. W.12. Tel. : Shepherds Bush 2070. 2333 Greenwich. S .E .10. 34 EAD-covered and Armoured Cables, P.I. and V .I.R ., .R.S. Cables and Flexibles, Welding Cables, supplied - various special lines at low prices.—Edwardes Bros.. T to M.O.S. requirements.—Edwardes Bros., 20. Black­ L20, Blackfriars Road. London, S.E.l. 7343friars Road. London, S .E .l. 7348 T E S L IE Dixon & Co. for Dynamos, Motors, Switchgear. to 5-h.p., 400/440, 3-phase, 50-cycle Motors, ex Govern­ -U Chargers and Telephones.—214, Queenstown Road. I ment stock, no permit required.—Dawson. Caledonia. Battersea, S.W.8. Telephone, MACaulay 2159. Nearest Oakengates. 2249 Rly. Sta. : Queen’s Road. Battersea (S.R.). 1 ,' -h.p., 220-volt, shunt wound, 3.000-rev. ball-bearing ~\/TONOMARK. Permanent London address. Letters re- 6 Metro.-Vic. Motor, with Brookhirst starter, I.C. panel. ^ directed. 5s. p.a. Write— BM /M 0N 053. W .C.l. 68 £18 10s.; 2-h.p. ditto, speed 720/1.440, £16.—Dawson. 1%/TOTOR Generator Sets and Convertors, all sizes and Caledonia, Oakengates. 2250 voltages from § kW up to 500 kW in stock.— .1-kW Turbo-Generating Set, 110 volt D.C., £40.— Britannia Manufacturing Co. Ltd., 22/26, Btitannia Walk. 6 2 Stewart Thomson & Sons. Fort Road. Seaforth. City Road, London, N .I. Telephone. Clerkenwell 5512. Liverpool, 21. 55 5513 & 5514. 28 'T i-h .p . Blackstone Crude Oil Horizontal Engine, com- ly/TOTOR Generators. Small D.C./D.C. Motor Genera- • 2 plete with water-cooling tank, filter and silencer, tors, drive off 12-volt accumulator and give 230 and fuel tank and fuel storage tank, 5 ft. long x 3 ft. 6 ins. volts. 30 m.a. D.C. output; off 6-volt. 110 v., 15 m.a. diameter, direct coupled to a “ Bull ” Dynamo. 23 amps.. output. Originally made for Gvt. radio; two commuta* 100/160 volts, 320 r.p.m., fitted with a series/shunt tors, ball bearings, laminated fields, insulated brush gear, switch. The complete unit is in a first-class condition. .covered armature windings. In new condition, 75s. each. Best offers to —Messrs. T. S. Bell & Co., 35. Tangier Aluminium Tubing, in approx. 12-foot coils, 5 /16 " I.D .. Street, Whitehaven, Cumberland. 49 new. surplus W.D. stock, 3s. 6d. each.—Leslie Dixon & Co.. Q A -k W , 220-v., 350-revs., S.I., two ped. brgs., on bed- 214, Queenstown Road, Battersea, London, S.W .8. 65 O w plate.—Greenhalgh Bros.. Burton’s Field Mill. 'VTAM EPLATES, Engraving, Diesinking, Stencils, Steel Atherton, nr. Manchester. 2293 Punches.—Stilwell & Sons Ltd., 152, Far Gosford 1 AA-h.p.. 400/3/50, S.R., 730-revs., Louvre Vent.. Street. Coventry. 14 B.T.H . (ball bearings), with Ellison O.I. gear.— N E new totally enclosed vertical Lancashire Dynamo Greenhalgh Bros.. Burton’s Field Mill, Atherton. M/cr. 2294 O 8-h.p. Fan Motor, for 200 v., 2-ph., 50 cys., with four facings, without feet, shaft 2 £" dia., 10 " long, key- 1 /irykV A Beiliss/Crompton Alternator, 400/3/50, 4- way 6" long, with starter complete. Ex stock. For price -LtfcVJ wire. Seen running.—Stewart Thomson & Sons, apply—H. J . H. King & Co. Ltd., Engineers, Nailsworth. Fort Road. Seaforth, Liverpool, 21. 47 Glos. 71 1 rC/Y-h.p., 420-volt D.C. Motor by English Electric Co.. HONE 98 Staines. 130-kW. 110 -v. D.C. Diesel A e J v J oil ring bearings. 716 r.p.m., compound interpole, P Generating Set; 60-kW, 220-vo. D.C. ditto: 7/9-kW, C.I. bedplate. 3rd pedestal bearing, pulley 2 1" x 21". 110-vo. D.C. ditto; 50-kW, 440/220-vo. D.C. Steam Set; and slide rails. " Igranic ” floor type starter panel with 400-kW Beiliss Surface Condenser; Weir Feed Pumps. volt- and ammeter. This motor is in excellent condition 9£" x 7" x 2 1" and 8i " x 6" X 13".—Harry H. Gardam and is being changed due to an A.C. supply being taken. & Co. Ltd., Staines. 60 Best offers to—Messrs. T. S. Bell & Co., 35. Tangier St.. LATIN G Motor Generator Sets with 400-volt. 3-phase. Whitehaven. Cumberland. 48 P 50-cycles driving motors: 4 1,000 amps., 6 volts 1 £ tr y k W . 500-volts, 700-revs. S.I., two ped. brgs.. on capacity; 1 3,000 amps., 6 volts; 1 3,000 amps., 10 volts; -L v Jv / bedplate.— Greenhalgh Bros., Burton’s Field Mill. 1 1.000 amps., 10 volts; 1 500 amps., 6 volts. With or Atherton, nr. Manchester. 2295 without switchgear.—Newman Industries Limited. Yate, O /Y/Y yards 19/.052 single new L.C. Cable.—Electricals Bristol. 2374 Ltd.. 14, Claremont Place, Newcastle-upon- O RCELAIN Cleats, 2 and 3 groove, various sizes ex Tyne. 3. 2222 P stock, price list.—Edwardes Bros., 20. Blackfriars O C I/V k V A Alternator. 400 volts, 3-phase, 50 cycles. 750 Road. London. S .E .l. 7344 revs., with direct-coupled exciter: also two 250- O RCELAIN Insulators, various sizes in stock, galv. kW Rotary Converters, with transformers and switchgear. P spindles.—Edwardes Bros., 20, Blackfriars Road. input 6.600 volts, 3-phase, 50 cycles, output 420/210 volts London. S .E .l. 7345 D.C.—Midland Counties Electrical Engineering Co. Ltd.. OTARY Converters in stock, all sizes; enquiries Grice Street. Spon Lane. West Bromwich. 36 R invited.—Universal Electrical, 221, City Road. Q/Y/Y-amp. Welding Set, 40/60 volt, petrol driven, self London. E .C .l. 16 contained, direct coupled, semi-portable, fully E V E R A L Telescopic Tower Ladders ready for essential overhauled.—The Electroplant Co. Ltd.. Wembley. 2370 S work. Extensions. Trestles and Steps to order.— Shaftesbury Ladders Ltd., 453, Katherine Road. E.7 Electric Motors. Dynamos, Transformers. Con- Grangewood 3363. 15 verters, etc.. etc., at low prices.—S. C. Bilsby. IEMENS-Schuckert Rotary Converter, type D.U.G.124. A.M.I.C.E.. A.M.I.E.E., Crosswells Road, Langley, near S 220 volts D.C. input. 150 volts A.C. output. 1.500 Birmingham. Phone. Broadwell 1359. 21 revs., 7.5 kVA. continuous, power factor 0.6.—Box 7338, c/o The Electrical Review. ARTICLES WANTED Q P E C IA L line. Bell and Telephone Wires, also screened ^ wires, large quantity, cheap.—Edwardes Bros.. 20. WANTED URGENTLY Blackfriars Road, London. S .E .l. 7346 T A FF Time Checking and Job Costing Time Recorders ALL KINDS OF P.V.C. CABLE. S (all makes) for quick cash sale. Exceptional con­ 2 m.m. and 8 m.m. RUBBER COVERED CABLE. dition. Write—Box 528, Smiths, 100, Fleet Street. TWIN & TRIPLE RUBBER OR COTTON COVERED. London. E.C.4. 31 REDUNDANT STOCKS PURCHASED FOR CASH. TEAM Engine for sale, twin cylinder, horizontal con­ S densing type by Robey. 120 b.h.p., installed new in W AND BEE & CO. LTD.. 1923, cost £2,000. suitable for steam pressure 50/60 lbs. Church Walk. Albion Road, Stoke Newington. N .16. sq. in. In perfect condition, may be seen running at any CLIssold 4232. time by appointment. Engine redundant through electri­ 7326 fication. £200 or nearest offer for quick sale as space is urgently required. Also considerable quantity of all sizes leather and composition belting, new and secondhand, for ACCUM ULATOR Plates (old) and lead Peroxide: as sale cheap.—J . J . Williamson & Sons (Canterbury) Ltd., actual smelters we pay top price. Also old storage St. Mildred’s Tannery, Canterbury, Kent. 2362 batteries, transformers and whole installations purchased. WITCHBOARDS suitable for dynamos and alternators, —Elton. Levy & Co. Ltd.. 18, St. Thomas Street. S.E.l. S all sizes from 100 amp. up to 1,500 amp.—Britannia Hop 2825-6. 39 Manufacturing Co. Ltd.. 22/26. Britannia "Walk, London. P O I L Winding Machines wanted for essential work.— N .I. 25 ^ Box 63, c/p The Electrical Review. July 20, 1945 E le c t r ic a l R eview (Supplement) 8 1

C ° ? n r w ^ S ^ ' r 44? BhC' to produce 12 to 15 kW. T O N D O N Representation. Manufacturers of Trans- board - M .E C®epe5acock s t s l l T 1" ^ Wi‘ h „ formers not represented in London and Southern -England who would like to avail themselves of an ex­ E m f £ C°.Pper WlrS wanted- Please quan perienced organisation (established 1907) having good Electrical" Review. gaUge and «1. c/o The connections with Government departments, corporations L5N G IN EERIN G Technical Books (new or secondhand) and other large buyers, and offering an opportunity for a provincial firm to establish a London office, should write T h in nfl^ r 'nnsSy GiJatitlt.y. Attractive cash offers. Call Third floor. 3o6, Oxford Street. W .l, or " StoneleiKh ' ^ ,*5?TeTIivC.e~ Box 2359’ c/ ° The Electrical Review. St. George s Avenue, Weybridge. ¿2 jyTA N U FA O TU RERS’ Agent (est. 1924) desires to con- "V X ERC U RY (Quicksilver) wanted. Write for packing vi . tact electrical accessories manufacturers requiring Northern representation.—Patrick. Hillside Drive. Wool- instructions Gold, Silver and Platinum also pur- ton, Liverpool. 7295 chased.—CoUmgrid|e & Co. Ltd.. Riverside Works. River­ side Road, Watford (Tel. 5963). 20 IVTAN U FACTU RERS’ Agents, covering the whole of NE 12,000-kW Steam Turbine, steam pressure 160 lbs Great Britain and Colonies, are desirous of contact­ O per sq. inch, total temperature about 650° F ing manufacturers with a view to sole selling rights (either 10.000 volts, 3-phase, 50 cycles, with all accessories and commission or buying), post-war arrangements considered. surface condenser.—Box 2334, c/o The Electrical Review —-Boi 23. c/o The Electrical Review. EELS and Drums required in fairly large quantities pJA TIO N A L Selling Organisation with nation-wide con­ R by wire manufacturers. Capacity 2 lbs. to 1 cwt tacts are prepared to consider agencies for all kinds Details to—Box 2363. c/o The Electrical Review. of Household and Hotel Equipment and Furnishings. TXTANTED. Rotary Converters, any size.—Universal London showrooms available for displays. Entire sales ’”<221. City Road, London, E.C.l. 22 organisation undertaken. Write, giving full details of product to be marketed, to—Box No. 21. B’iriings, 8. W ANTED. 1/6-h.p., 240/1/50. 1,440-r.p.m. R.T Balfour Road, Ilford. 7319 ’ ’ Motor, preferably resilient mounted for Frig.—Box 2388, c/o The Electrical Review. CJPAIN. Electrical Engineer with extensive connections in electrical and radio branches all over the country, desires representations. Address—Apartado 9119, Madrid. WORK WANTED AND OFFERED 2310 TAT"ANTED, Agencies for British India, Burma, Ceylon for A.C. and D.C. Motors. Fractional H.P. Motors. CAPACITY FOR Alternators, Generator Sets, Switchgears, Pumping Sets. Arc Welding Units, Power Tools, Cables, Meters. Trans­ VACUUM IMPREGNATING FOR TROPICAL formers, Convertors, Fans (Table, Exhaust and Ceiling). A.C. and D.C. Cinema Carbons and Sound Equipments AND MOST SPECIFICATIONS. for theatres. Radios, Lamps, Fittings, with all accessories, by a well-organised firm, throughout above areas. Five F. W. BLANSHARD LTD.. offices, with sub-agents in all towns. Sound business guaranteed. Apply Havells Electrical Sales Corpn., 59. 128/130, Oval Road, Croydon. Forbes Street, Fort. B'ombay, with prices, catalogues and terms. 2188 Telephone: CROydon 3411/2. BUSINESSES FOR SALE AND WANTED “jlTACH INING capacity available on precision capstan T ^LEC T R IC A L Wholesalers’ business wanted, preferably and centre lathes, accurate work to fine limits, small London or Home Counties. Must be well established, lots or quantities.—Box 2366, c/o The Electrical Review. of good trade standing (E.W .F. members preferred). Would 1\TACHIN IN G Work, for Centre Lathes up to 64 in. purchase outright or controlling interest. Reply initially in centres and medium-sized milling (good grade work strictest confidence—Box 7322, c/o The Electrical Review. preferred).—The London Electric Firm, Croydon. Up­ lands 4871. 56 /'T.OOD class Electrical business for sale, house (six T>LUMBING. Plumbing units to our own design or to rooms), showroom, stores, workshop, etc., freehold. A- customers’ requirements in any quantities for all For full particulars apply—Box 7294, c/o The Electrical types of buildings. Enquiries invited.—See-Agg Units Ltd.. Review. 44. Worship Street. E.C.2. Phone. BIS. 7503. 2356 MALL Armatures, etc., winding or re-winding, in BUSINESS OPPORTUNITIES S quantity. High-class work, prompt delivery.— A N English Company in England, having been manu- Southern Ignition Co. Ltd., 190, Thornton Road, Croy­ facturers of certain well-known electric domestic don. 59 appliances, and shortly to recommence, is seeking an rpRANSFO RM ERS, single and three-phase. All types opportunity of forming a separate organisation to handle up to 10 kVA.—Woden Transformer Co. (Phone. the sales and servicing of its products. A large section Bilston 41959), Moxley Road. Bilston, Staffs. 11 of its business has been with the supply authorities, with whom it is proposed to operate again. Capital will be required and interested parties in the trade must on)v AGENCIES apply on their appropriate business heading being signed young man desires London Agency from manufacturer. by the responsible person. As conditions permit, extended A Good connection with electrical and wireless whole­ proposals would follow.—Box 7325, c/o The Electrical salers and retailers.—Box 7103, c/o The Electrical Review. Review. A GENCIES required for London, South of England, for the following: (1) Domestic electrical appliances: (2) Brass electrical accessories, switch plugs, etc.: (3) Con­ EDUCATIONAL NOTICES_____ duit. Advertisers have clientele with every wholesaler in the territory mentioned. Immediate turnover can be guaranteed. Either commission or buying basis. Post­ THE POLYTECHNIC. REGENT ST., LONDON, W.l war arrangements considered. — Box 64, c/o The Elec­ trical Review. School of Engineering GENCIES required, South of England, including the (Head of School: Philip Kemp, M.Sc.Tech.. M .I.E.E., A London area: (a) Cables: (b) Small Switchgear; (c) A.I.Mech.E.) Transformers; or any lines suitable for distribution for wholesalers’ business.—Box 40, c/o The Electrical Review. lectrical engineering, a full-tim e day GENCIES required, Yorkshire and N. of England, for E COURSE, extending over a period of three years, A Electrical Appliances and Accessories, etc. Excellent prepares students for the National Diploma and pro­ connection corporations, wholesalers and factors.— Box fessional examinations and for all branches of the electrical 7328, c/o The Electrical Review. engineering industry. X ?X PO R T to India: An export house with well-estab- Session 1945-46 begins on September 18th, 1945. Early lished connections in the Indian market desires to application for admission is advisable. hear from manufacturers of Electrical Accessories, House­ EVENING CLASSES in Electrical Engineering begin hold Appliances, Refrigerators, etc., who seek to expand on September 24th. (Enrolment : September 17th to 19th. their export business. Write, giving full details, to the Prospectuses, giving full particulars of courses, fees, Empire Export & Import Company. 2, Broad Street Place. etc.. may be obtained on application to the undersigned. London. E.C.2. i 6—8 p.m.). ATE Chief Draughtsman, Switchgear, etc.. considering7° J . v C. JONES. L devoting time to agency work (electrical preferred). The Polytechnic, Director of Education. Lancs, area, commission and small expenses. B'ox 7331, 309, Regent Street. c/o The Electrical Review. London, W .l. 2361 82 CSupplement) E lec trical Review July 20, 1945 EDUCATIONAL NOT IC E3 — Continued Great Possibilities for TECHNICALLY QUALIFIED ENGINEERS LATEST A.M.I.E.E. RESULTS

N the recent Examinations held by the Institution of Key Men In War-Time and Afterward* I Electrical Engineers 477 Candidates sat who had taken B .I.E .T . courses. Of these 457 were successful in passing the examinations. We believe this record of 457 successes out of 477 entrants has never before been rpTTF. finest posts and the great majority of posts in approached by any oral or correspondence tutorial J - Great Britain in this war are technical. The same organisation, and indicates the very high efficiency of will be the case when the war is over. The vast increase the modern system of Technical training which we have in mechanisation now being applied to war purposes will laid down. then be suitably utilised in reconstruction, and in trade and commerce. Take a recognised Engineering Quali­ The B .I.E .T . tutorial organisation is waiting to assist fication through home-study with the T .I.G .B.. whose you either with a short specialist course or complete Students have gained 35 FIRST PLACES in the training for a recognised examination. A.M.Inst.C.E.. A.M.I.E.E.. A.M.I.Mech.E.. A.F.R.Ae.S.. We have available a large full-time staff of instructors, etc.. examinations. Write to-day for “ The Engineer’s while the efficiency of our extensive organisation is a Guide to Success,” containing the world’s widest choice byword among engineers. of engineering Courses—over 200—covering all branches: Electrical, Aeronautical. Mechanical. Wireless, etc. WE GUARANTEE—” NO PASS—NO FEE ” THE TECHNOLOGICAL INSTITUTE OF May we send a copy of " EN G IN EERIN G OPPOR­ TUNITIES ” ? Containing a great deal of useful advice GT. BRITAIN and detailed information on over 200 Home-Study Courses 35. Temple Bar House. London, E.C.4. - 77 and examinations, this handbook is of very real value to the ambitious engineer. Our highly informative handbook will be sent F R E E and without obligation on request. MISCELLANEOUS HOTOGRAPHY. A photograph says more than a BRITISH INSTITUTE OF ENGINEERING P thousand words. Realistic photographs for catalogues, TECHNOLOGY. brochures and general reproduction purposes. All branches of photographic work undertaken. Records made of present Established 1927—over 200.000 students. work, premises, etc.—Miles & K aye Ltd., Industrial Photo­ 12. Shakespeare House, 17, 18 & 19. Stratford Place graphers/ 100, Southampton Row, London. W.C. . Tele­ Oxford Street. London, W.1. phone, HOLbom 6858. Established over 50 years. 2248 33

y I r H SPEWED s t e e l b l a d e s

-- Cl*na%in$ Ou{pi*t

Obtainable bom all Tool Dealers Made by JAMES NEILL A CO. (Sheffield) LTD., SHEFFIELD, 11 There's NO TIME TO LOSl! These are busy days for Father Time. He's off now to appear in one of our National and Provincial press Advertisements telling the public that it's still vital war work first... then will come the fruits of victory AND TEMCO.

WNCHftONOtfj inertie CLOCKS A product of TELEPHONE MFG. CO. LTD. Marketed by T.M.C» HARWELL (SALES) LTD., 233 Shaftesbury Avenue. London. W .C .2 July 20, 1945 E le c t r ic a l R ev iew (Supplement) 83

Transmission and Conveying Chains, Wheels and Accessories for oil mechanical purposes

THE RENOLD AND COVENTRY CHAIN COMPANY LIMITED MANCHESTER • ENGLAND

Good Stocks of...... Romac H. T. Terminals are avail­ able on cards for re-sale in one dozen bores of 4 . . . or in dozen or gross lots for workshop use.

Price list sent on request. Enquiries for bulk supplies are invited. H.T. Terminals LITHOLITE INSULATORS & Handy, quick - fitting type ; size 7 m/m. No baring of wire, no solder or tools required. ST. ALBANS MOULDINGS LTD ROMAC INDUSTRIES LIMITED The Hyde, Hendon, London, N.W.9 S k . r n . M M . ROMAC 84 ( Supplement) E l e c t r ic a l R ev iew July 20, 1945

PAGE Index to Advertisers Drayton Regulator & Instrument Co. L td ...... 66 • PAGE Du Bois Co. Ltd ...... 62 Aerialite Ltd ...... 63 Duratube & Wire Ltd...... 86 Associated Fire Alarms Ltd...... 86 Earthing Clip Co ...... 88 Baker Platinum Ltd...... 45 Edison Swan Electric Co. Ltd...... 53 Berry’s Electric L td...... 42 Elcordia Ltd...... 60 Bill Switchgear Ltd...... 3 Ellison, George, Ltd...... 39 Birmingham Mica Co. Ltd...... 86 English Electric Co. Ltd...... 7...... 15 Britannia Batteries Ltd...... 58 Evans, Adlard & Co. Ltd...... 86 Britannic Electric Cable & Construction Co. Ltd.. . 55 Evans, F. W., Ltd ...... 66 British Central Electrical Co. Ltd...... 54 Falk, Stadelmann & Co. Ltd...... 27 British Electric Resistance Co. Ltd...... 69 Ferguson, Pailin Ltd ...... 72 British Engineering Export Journal...... 17 Ferranti Ltd Cover i & 11 British Insulated Callender’s Cables Ltd...... 25 Firth-Vickers Stainless Steels Ltd ...... 62 British Klockner Switchgear Ltd...... 88 Flextol Engineering Co. L td...... 46 British Thomson-Houston Co. Ltd...... 5 & 37 Fraser & Glass Ltd...... 67 Brook Motors Ltd...... 21 Fry’s Metal Foundries Ltd...... 47 Browning's Electric Co. Ltd...... Cover iii General Electric Co. Ltd...... Cover iv & 74 Bruce Peebles & Co. Ltd...... 2 Godwin, H. J., Ltd ...... 34 Brush Electrical Engineering Co. Ltd...... 24 Hampton Works (Stampings) Ltd...... 58 Bull Motors...... 1 Hannah, S. H., Ltd...... 70 Bullers Ltd...... 12 Hart Accumulator Co. Ltd...... 62 Burco Ltd...... 41 Hedin L td ...... 26 BX Plastics Ltd ...... 29 Henley’s, W. T., Telegraph Works Co. Ltd...... 13 Bylock Electric Ltd...... 34 Hildick & Hildick...... 64 Cambridge Instrument Co. Ltd...... 42 Hoffmann Manufacturing Co. Ltd...... 3 Canning, W., & Co. Ltd...... 22 Hopkinson Motors & Electric Co. Ltd...... 84 Celestion Ltd...... 70 Houchin Ltd...... 85 Clifford, Charles, & Son Ltd...... 34 Igranic Electric Co. Ltd ...... 59 Collins Electrical Ltd...... 27 Injection Moulders Ltd...... 85 Consolidated Pneumatic Tool Co. Ltd...... 7 International Electrolytic Plant Co. Ltd...... 48 Cressall Manufacturing Co. Ltd...... 60 Iso-Speedic Co. Ltd ...... 44 Crompton Parkinson L td 18, 28 & 73 Jackson Electric Stove Co. Ltd...... 19 Crypton Equipment Ltd...... 32 Jenson & Nicholson Ltd...... 60 Cryselco Ltd ...... 38 Johnson & Phillips Ltd...... 33 Darwins Ltd...... 2 Joyce Engineering Ltd ...... 46 Davis & Timmins Ltd...... 88 Kerry’s (Great Britain) Ltd ...... 84 Dennis, G. P., Ltd...... 26 Key Engineering Co. Ltd...... 88 Dewhurst & Partner Ltd...... 48 Klaxon Ltd...... 59 Dolphin Engineering Co. Ltd...... 85 Litholite Insulators & St. Albans Mouldings Ltd.. . 83 Donovan Electrical Co. Ltd...... 26 & 46 D.P. Battery Co. Ltd ...... 65 (Continued on page 86)

HOPKINSON MOTORS & ELECTRIC CO • LTD K i s p y v ’s in common with most other engineers (CREAT BRITAIN) lid . are wholly employed on production for furthering the total war effort. On the return of normal conditions they formerly EAST LONDON RUBBER Co. Ltd will be in the position to supply: ELECTRIC MOTORS Fractional horse-power motors Industrial motors up to over 100 h.p. ALTERNATORS • CONTROL GEAR and OTHER ELECTRICAL EQUIPMENT LA M P S and will welcome enquiries for the ° post-war developments INDUSTRIAL FITTINGS H O P K IN S O N M O T O R S & E L E C T R IC Co. Ltd Grangeway • Kilburn ■ London NW6 CABLE 4WIRING SUPPLIE5 Telephone : Maida Vale 9306/8 A member of the WARTON RD, STRATFORD LONDON. E.I5. (MARvland 6611) & BRANCHES J“!y 20, 1945 E le ct r ic a l R eview ( Supplement) 85

F b Tl e CTRICALLY'DRIVEN p u m p i n g s e t s ^ I Trade PULSOMETER Mark CENTRIFUGAL PUMPS FOR HIGH TEMPERATURE LIQUIDS in High Pressure Heating Circuits, Process Work in connection with Thermal Storage Tanks, Hot Oils for Refineries The “ Pulsometer ” JB Pump covers a wide range of duties and will withstand high temperature stresses and pressures.

Pulsom eter engineering G ill? r e a d i n g ^

Specialists In the moulding of Poly­ styrene, Polythene and Cellulose Acetate as applied to the Electrical Industry. W e shall be very pleased to forward any information requested. INJECTION MOULDERS (Bureau I) Westmoreland Road, London, N.W.9 Telephone : COLindale 8868/9

DOLPHIN ENGINEERING CO. LTD. ^ 1YTTELTDN gQAD. LONDON N .2 . fSPD. 3445-7) 8 6 ( Supplement) E l e c t r ic a l R ev iew July 20, 1945

Index to Advertisers Natural In all Grades and Qualities, Stove Micas, Plates, {Continued from page 84) PAge A* Washers, Commutator Seg­ Londex Ltd...... 88 MIGA ments, Condenser Films, etc. Macintyre, James, & Co. Ltd...... 54 Moulding, Commutator, Flex­ Martindale Electric Co. Ltd...... 43 ible, Heat-resisting Qualities, M. & C. Switchgear Ltd...... 49 Commutator Rings, Spools, Mek-Elek Engineering Ltd...... 64 MIGANITE Tubes, etc. Mercury Switch Mfg. Co. Ltd...... 34 Mouldings of any shape or Metropolitan-Vickers Electrical Co. Ltd...... 6 form, Tubes, Plates, Washers, Mica Manufacturing Co. Ltd...... 66 Sheets in all thicknesses, Midland Electric Mfg. Co. Ltd...... 31 BAKELITE e tc . Ministry of Fuel and Power...... 57 SEND TO THE MANUFACTURERS Mitchell Electric Ltd...... 50 Moffats Ltd...... 10 Multicore Solders Ltd...... 26 The BIRMINGHAM MICA Co. Ltd. Neill, James, & Co. (Sheffield) Ltd ...... 82 South Road, Hockley, Birmingham Newey Engineering Co. Ltd...... 50 Telegrams : “ Insulation, Phone, Birmingham.“ Newman, Hender & Co. Ltd...... 67 Phone : Northern 0118. Parmiter, Hope & Sugden Ltd...... 87 Parsons, C. H., Ltd...... 71 Pearson, C., & W. P. Beck Ltd...... 50 Petters Ltd...... 51 Philips Lamps Ltd...... 68 Poles L td...... 66 Pope’s Electric Lamp Co. Ltd...... 9 Pulsometer Engineering Co. Ltd...... 85 Ransome & Maries Bearing Co. Ltd ...... 56 Rawlplug Co. Ltd...... 30 Renold & Coventry Chain Co. Ltd...... 83 Repton Engineering Co ...... 64 Revo Electric Co. Ltd...... 35 Reyrolle, A., & Co. Ltd...... 16 Robinson, Lionel, & Co. Ltd...... 36 Romac Industries Ltd ...... 83 . Rotunda L td ...... 52 Runbaken Electrical Products...... 70 Ruston & Hornsby Ltd...... 40 Service Electric Co. Ltd...... Cover iii Siemens Electric Lamps & Supplies Ltd ...... Cover ii i Pel rol Proof -Non InllaiwnaWe : Non Ageing Simmonds & Stokes Ltd...... 65 Smith, Frederick, & Co...... 14 Sordoviso Switchgear Ltd...... 61 F a g g s R.o a d ^ FELTHAM • Middlesexj Sparklets Ltd ...... 50 Spicers Ltd...... Cover iii Spiral Tube & Components Co. Ltd...... 26 Standard Telephones & Cables Ltd...... 23 FIRE A.R.P. Surgical Equipment Supplies Ltd...... 52 ALARM etc. Symonds, R. H., Ltd...... 58 BELLS Taylor Electrical Instruments Ltd...... 63 Telegraph Construction & Maintenance Co. Ltd... 20 T.M.C.-Harwell (Sales) Ltd...... 82 IRONCLAD WEATHERPROOF Transformer & Electrical Co. Ltd...... 64 AND GAS- AND WATER-TIGHT Tudor Accumulator Co. Ltd...... 55 Tullis Russell & Co. Ltd...... 8 TYPES FOR AC. OR D.C. Vacuums Ltd...... 70 ALL VOLTAGES UP TO 250 Venner Time Switches L td...... 54 Veritys Ltd...... 43 Vislok Engineering Ltd...... 48 Walsall Conduits Ltd ...... 4 ASSOCIATED FIRE ALARMS Walters, Austin, & Son Ltd...... 61 LTD. Weekes, L., (Luton) Ltd...... j ...... 36 Westminster Laboratories Ltd ...... '...... 52 SUTHERLAND WORKS, ST. ANDREW RD. Yorkshire Copper Works Ltd ...... 69 WALTHAMSTOW, LONDON, E.17

INSTRUCTIONELECTRICAL REVIEW'S CHART FOR DEALING WITH APP A RE N T DEATH F R O M lor CLEANING ELECTRIC SHOCK and ORYINC TRANSFORMER In accordance with H.O. Electricity Reg. No. 29 OIL ELECTRICAL REVIEW W rit« for Samples and Prices to i Dorset House, Stamford Street, London, S.E.I EVANS, ADLARD & Co. Ltd. ______Telephone : WATerloo 3333 POSTLIP «ILU. WIHCHCOMBŁ CHELTEIIHł» July 20, 1945 E le c t r ic a l R eview (Supplement) 87

HOPE'S PATEHTS4

Chassis Type SWITCH AND FUSEGEAR for breaking capacity and thermal capacity

The chassis type of Aeroflex switchgear embodies

Aeroflex high breaking capacity rewirable cartridge

fuses with their unique combination of properties :

breaking capacity adequate to the highest category ;

time-lag under operational overloads ; complete

freedom from ageing ; no margin of unusable rating

between full load current and blowing current ; easy

and cheap rewirability. The switches are built in

the form of robust self-contained chassis units,

independent of the box.

PARMITER, HOPE & SUGDEN LTD. Longsight, Manchester 12 London : 34 Victoria Street, S.W .I 88 (Supplement) E le c t r ic a l R eview July 20, 1945

Small Turned Parts and Inserts made to order. Enquiries Invited. T E C O L EARTHING CLIPS FIBRE FOR CIVIL AND INDUSTRIAL USE BRASS WIRING SADDLES CONDUIT Galvanized Iron Saddles and Large Stocks now avail­ Toe Clips etc., for Shipwork able at Manchester THE EARTHING CLIP CO. KEY ENGINEERING CO. LTD. TECOL WORKS POWNALL SQUARE 4 QUEEN VICTORIA STREET, LONDON LIVERPOOL 3. Telephone: Central 8537 AND MANCHESTER.

SNAP-ACTION REMOTE MA/NS. C O N T R O L LIMIT SWITCH O F S T R E E T L IG H T S ', T Y P E A K F R LIGHTING MASTER S k V / T C R . RELÀY.

PILO T W IRE. BATTERY.

OTHER PRODUCTS : This simple arrange­ AUTOMATIC STARTERS ment in wide use ROTARY SWITCHES CONTACTORS MAWS. OVERLOADS British Kiockner Switchgear Ltd. L 0 N D E X • LTD Chertsey, Surrey. : ciurtuy m i,a MANUFACTURERS OF RELAYS Aai,".L4T 207-ANERlEY ROftD- I.0ND0HSE20 „„SSSTii»/»

Printed in Great Britain at THE Chasel river Press, Andover, Hants, and published by Electrical Review, Limited, at Dorset House, Stamford Street, London, S.E.l July 20, 1945 E l e c t r ic a l R eview iii

Official Repairers to Councils and the leading REPAIRS Insurance Companies. For All Classes of M anufacturers of ELECTRICAL AND MAGNETIC SEPARATORS, MAGNETIC PULLEYS. TRANSFORMER COILS AND SWITCHES, MECHANICAL REPAIRS ELECTRIC SOLDERING IRONS Consult BROW NINGS ELECTRIC Co Ltd BOLEYN CASTLE, GREEN STREET, UPTON PARK, LONDON. E.I3 Telephone : GRAngewood 4004/5 Established 1919

In these days of tremendous war effort where high quality in materials is of paramount importance “ Sistoflex” remains unsurpassed SPICERS LIMITED

19 NEW BRIDGE ST., LONDON, E.C.4. Telephone: CENTRAL 4211

SECOMAK ) f Regd. Trade Mark # MORE POWERFUL HIGH-SPEED # MORE RELIABLE PORTABLE # EASIER TO USE This blower with a 212- BLOWER mile-an-hour blast of dry air dislodges all foreign matter from windings of electric motors and other inaccess­ ible places. Send for leaflet S 7/100. Cleaning, u irt causes unnecessary iriccion in mdLiimery.wdsici Telephone: Wembley 0194/5 costly power, andano is thetne directairect cause ofot rapidrapio depreciation.aepreciation. SERVICE ELECTRIC CO. LTD., Abbey Estate, Mount Pleasant, Alperton, Middx. July 20, 1945

ây r e - u / a r s.s.e. d e c o r a t i v e f i t t i n g

now for reconstruction . the memories of those delightful G.E.C, fittings of character and refinement known so well before the war may soon be happily revived. The cloak of the Company’s O f S .á .C . great war effort will be shed, and its fittings l a n t e r n designers and manufacturing craftsmen will f o r w a r be free to turn their skill and artistry once street liy h tin a again to producing ranges of fittings that will satisfy the tastes and needs of all.

DESIGNERS AND M A N U FACT U R ELECTRIC LIGHT FITTINGS

Advt. oj The General Electric Co., Ltd., Magnet House, Kingsway, London, W.C.2