Vol. CXXXVII No. 3532 AUGUST 3, 1945 9d. WEEKLY
. . . Here’s something good
M ETAL C APS are fitted inH.R.C. fuses under great pressure. N o cenrtent is used.
FILLING is of powdered silica which fuses with the non-deteriorating silver element and quenches POUTECHNIKI
THE PATENT INDICATOR is a bead secured by a fine high resistance wire. Fusing ejects the bead.
THE CARTRIDG E Is of special ceramic material made in the M.E.M. “ Kantark ” H.R.C. Fuses can M.E.M. pottery. be used in existing M.E.M. fuseboards.
WRITE FOR LIST NO. 270 FOR FULL DETAILS
“KANTARK” H.R.G. FUSES
MIDLAND ELECTRIC MANUFACTURING CO. LTD., TYSELEY, BIRMINGHAM, 11 London Showrooms and Stores : 21-22 Rathbone Place, London, W .l Manchester Showrooms and Stores : 48-50 Chapel Street, Salford,3 E lectrical Review August 3 , 1 9 4 5
Driving one of Britain’s
largest cement kilns*
The Crompton Parkinson Motor shown above has given many years’ reliable service in its testing job. In designing large motors to meet the requirements of the drive, Crompton Parkinson are able to apply experience dating from the very foundation of the electrical industrv.
jHHl tRom PTon^pnRKinson LIMITED
ELECTRA HOUSE, VICTORIA EMBANKMENT, LONDON, W.C.2 and B ranches August 3, 1945 E l e c t r ic a l R e v ie w 1 hard lines on hard water
Because we do not consider the acquisition of‘‘Fur Coats” conducive to the welfare of Electric Water Heaters, we are developing the use of Monel for ALL Heatraes as soon as possible, thus ensuring yet greater“ Intestinal Fortitude” — known vulgarly by a more concise word. Monel is better able to with stand the ravages of hard w ater ; any scale deposit is more easily removed and no re-tinning is necessary because Monel need not be tinned.
leaders in eledric w ater heaters
HEATRAE LTD., NORWICH • PHONE : NORW ICH 25131 • GRAMS : HEATRAE, NORW ICH
Sole Manufacturers of “WESTMINSTER” ARC LAMPS THE “ FACILE” For TERMINAL Photography Send for Prices and and List of all Medical k inds of Terminals purposes ROSS COURTNEY *Lf S i M A K ER S O F— ASHBROOK ROAD, LONDON, N. 1» Electric Welding Machines and Patent Scaling Machines. Spot, Seam and Butt Welders. ** W estminster ” Carbon Brush H o ld e rs. ** Partridge ” Earthing Devices and Pressure Detectors. CHOKE SCREWS' Dynamos, Motors, Alternators and Transformers Rewound to the specific requirements of and Re-constructed our customers.
Telephone: Willesden 1700, 1701 Makers of all ty Telegrams : “ Regency, Phone, London ” pes of repetition products from the bar in all The WESTMINSTER metals ENGINEERING CO. LTD. M C L and R E P E T IT IO N LTD. VICTORIA ROAD, WILLESDEN JUNCTION Pool Lane. Langley, Birmingham. LONDON, N.W.IO A 2 E l e c t r i c a l R e v i e w A u gu st 3 , 1 9 4 5
EVERYTHING HAD A BEGINNING—
N D, when the telephone was still in its infancy, we made the f i r s t electricalA batteries and lit the Royal Exchange, the Royal Mint and other important buildings. Since then we made the f i r s t electrical accumulators to be fitted to Br i t i s h a i r c r a f t also the f i r s t British g r o u n d s t a r t e r Batteries, and the f i r s t British m o u l d e d b a t t e r y c o n t a i n e r s . When you see those bomber engines leap into action, or the navigation lights of night-flying aircraft, you can be certain that the energy is provided as a direct result of those pioneer days, which commenced in 1882, when P. & G. and E.P.S. produced the first commercial accumulators. ‘M r. Watson, please come here ; I want you’ was the first telephone message ever transmitted, and this illustration shows the instrument invented, and REPLATING—Ensure long and reliable service used on that memorable occasion in the year 1875, by Alexander Graham Bell. by having your present batteries replated by us. PRITCHETT & GOLD and E .P .S. CO. LTD .
— formerly the Electrical Power Storage Co., Ltd. — MADE THE FIRST BATTERIES PGI63/44
G rosvenor Gardens, London, S.W.l. Phone: SLOane 7164. Grams: Storage,Sowest, London
Many thousands of Peebles Pole Mounting Transformers are efficiently serving the rural districts of the nation and in countries overseas. Their unvarying reliability season after season,during stormy weather, with temperatures below zero, or in the hottest days of summer, ensures an unfailing supply of power to large numbers of villages, hamlets and farms. PROVED IN PRACTICE ALL OVER THE W ORLD
BRUCE PEEBLES & CO. LTD. ENGINEERS EDINBURGH Manufacturers of all sizes and types of Rotating •Electrical M achinery.Tfansformersand Rectifiers
3561 August 3, 1945 E l e c t r ic a l R e v ie w 3
THE SMALLEST TRIPLE POLE SWITCHFUSE EMINENTLY SUITABLE FOR MACHINE TOOLS (¡ | j ) RflDETTE. 10Amperes. 500volts. Catalogue N°Qi438
BILL SWITCHGEAR LTD LONDON A.WZELLEV, ASTON LANE, PERRY BARR ’ MANCHESTER GLASGOW 73 GT PETER ST. BELFAST WESTMINSTER S.W.I. BIRMINGHAM-20 BURTON-ON-TRENT
PHONE. BIRCRIIEXbS 5011 CRAMS 8 ILSWITCH B'HAM
ANY PROBLEMS ? We can design whatever you need in unusual electrical equipment
OFFICES & WORKS : ST. MARY CRAY, KENT & BRIDGWATER, SOM. 4 E l e c t r ic a l R e v ie w August 3, 1945
LAMINATIONS
Brands :
“ STALLOY,” "MEDIUM RESISTANCE." “SPECIAL LOHYS," " LOHYS "
JOSEPH SANKEY & S O N S Lt d ., BILSTON
L O N D O N : 168 R e g e n t Street, W.| August 3, 1945 E l e c t r ic a l R e v ie w 5
TRADITIONAL RELIABILITY
ELECTRIC MOTORS
BTH MOTORS AND CONTROL GEAR used in all industries throughout the world.
SPECIFY BTH
BTH RUGBY T H E BRITISH THOMSON-HOUSTON COMPANY LIMITED. RUGBY. ENGLAND A3461 E lectrical Review August 3, 1945 OVERHEAD LINE FITTINGS
Cone Type Mid-span Tension Joint for Steel Cored Aluminium Con ductors of -15-175 sq. In. copper equivalent section.
Cone Type Tension Clamps for Steel Cored C opper Conductors of '025-'075 sq. in. copper equivalent section.
Aluminium Repair Sleeve for Steel Cored Alum inium Conductors up to • 175 sq. in. copper equivalent section.
Non Tension Joint for Steel Cored Aluminium Conductors from I up to - 175 sq. in. copper equivalent section.
A small selection from the range of Overhead Line fittings of the well-known British Ropes design, which are now manufactured in our own shops. Quick deliveries ot many types can be offered from com ponents in stock. Prom pt quotations for standard or special designs.
Our experience is at your disposal.
TELEPHONE 0 I telegrams SOUTHAMPTON 1 2141 (5 LINES). i r e l l i -U e n e r a L SOUTHAMPTON - CABLE WORKS. Ltd., SOUTHAMPTON. August 3, 1 9 4 5 E l e c t r ic a l R e v ie w 7
Robert Sharp Partner! C35 E l e c t r ic a l R e v ie w August 3, 1945
SCALE and FUR on KETTLES A CASES SPECIALLY DESIGNED WATER-HEATERS We will gladly co-operate in designing and producing models ETC. exclusive to you.
removed harmlessly CASES OF STANDARD DESIGN
in a short period For the first time you can now buy IMHOF Cases designed to S IM P L Y A D D fulfil a specific purpose from stock. “Fur-offit” t f L CASES TO YOUR. SPECIFICATION W r Imhof’s are fully equipped to to the hot water in the utensil build cases of all types to rigid specification and to close limits. and the mixture does the rest A postcard will reserve for you a copy QUANTITIES OF APPLIANCES of our entirely new 16pp. catalogue CAN BE TREATED IN A BATH now in preparation. . . OF THE LIQUID . . SAVE FUEL by i ■
using scalefree utensils
Send P.O. for I /6 fo r sample bottle Including postage and packing DRAKE & GORHAM WHOLESALE LTD. 77 L O N G A C R E , L O N D O N , W .C.2 Telephone : TEMple Bar 3993 MANCHESTER—29 Piccadilly. BRIGHTON— 24 Marlborough Place. GLASGOW—182 St. Vincent Street. BRISTOL—2 & 4 Church Street, Temple. DUBLIN—2 Church Lane, College Green. Midland Representative : W. T. BOWER, 184 Jockey Road, Sutton Coldfield August 3, 1945 E l e c t r ic a l R e v ie w 9
A.C. supplies stabili sed by this simple and static apparatus The Westinghouse A.C. voltage changes in either load or mains, stabiliser provides an undis compensation being complete torted output voltage wave within \ to 1^ cycles of the over a wide range of load, with supply. the output held within fine limits in spite of simultaneous Standard sizes from 80 to 1,200 variations in both input voltage V.A. for use on 190/260 volts and load. It responds very single-phase 50 c.p.s. A.C. rapidly indeed to sudden supplies. “STABILISTOR” THE WESTINCHOUSE A.C. VOLTAGE STABILISER WESTINCHOUSE BRAKE & SIGNAL CO. LTD.» Pew Hill House, Chippenham, Wilts. 10 Electrical Review August 3 , 1 945
A rtew era of brightness in the home, office and factory i Brightness, cheerfufness, cieanii- ness, fresh air, good health andgood lighting are the order of theday. Good lighting is a tonic -especialiywithOsram!
Advt. of The General Electric Co. Ltd., Megnet Home, IClngswi,. London. W.C.2 August 3, 1945 E l e c t r ic a l R e v ie w 11 n k | | D A W F I I n c u i i i n W l m P U W E K d EI i IIV v PRODUCTION
F^R RAN T I ^J tansfotsnets E l e c t r ic a l R e v ie w August 3, 1945 August 3, 1945 E l e c t r ic a l R e v ie w 13
Lead alloy tubing for operation extruded seamless lead '• Pluto ” being extruded on the Henley StraightThrough Lead Press. alloy tubing for
OPERATION
THE BULK OF THE LEAD ALLOY TUBING USED FOR H.A.I.S. CABLE WAS MADE ON HENLEY STRAIGHT THROUGH LEAD PLUTO" PRESSES. extrude flawless sheathing for HENLEY W. T. HENLEY’S TELEGRAPH WORKS COMPANY LIMITED MILTON COURT, WESTCOTT, Ca b l e s DORKING, SURREY E l e c t r ic a l R e v ie w August 3, 1945
363,280,000 YARDS OF ASHTON CABLE have been supplied by Aerialite Ltd. to the Fighting Services to date.
CABLES FOR LIGHTING, HEATING, TELEVISION, RADIO, TELECOMMUNICATION, ETC. AERIALITE LTD I STALYBRIDGE-CHESHIRE I August 3 , 1 9 4 5 E l e c t r ic a l R e v ie w • 15 PLANT MOTORISATION USING 'ENGLISH ELECTROMOTORS AND OVERHEAD BUS-BAR SYSTEM
View in a factory containing 105 belt driven machine tools.
105 machine too changed over to in dividual motor drive, including ail electrical connectionsand motor isation of the machines.
This changeover is fully described in our publication entitled ‘P L A N T M O T O R IS A T IO N ’
WRITE FOR YOUR COPY to Fusegear Dept. STAFFORD. THE ENGLISH ELECTRIC COMPANY LIMITED London Office: QUEEN’S HOUSE. KINGSWAY, LONDON, W.C.2 W ORKS: STAFFORD - BRADFORD - RUGBY - PRESTON 1 6 , E l e c t r ic a l R e v ie w August 3, 1 9 4 5
REGISTERED ASSOCIATION MARK
The Members of the Association of Steel Conduit Manufacturers
have pleasure in announcing that
A S F R O M 1st MAY, 1945 THE TRADING SCHEME IN RESPECT OF A.S.C.M. STEEL CONDUIT HAS BEEN ENTIRELY REMODELLED.
ALL TRADE BUYERS OF STEEL CONDUIT ARE ENTITLED TO A GRADED DISCOUNT UPON THE BASIS OF THEIR ANNUAL PURCHASES, AND SUCH GRADED DISCOUNT WILL BE ALLOWED OFF INVOICE AT THE TIME OF PURCHASE.
CUSTOMERS WILL NOT BE ASKED TO SIGN AS EXCLUSIVE BUYERS.
EXCLUSIVE BUYING BONUS AND DEFERRED REBATES ARE TO BE DISCONTINUED.
Full details of the Scheme may be obtained from any Member, Authorised Wholesale Factor or :
The Secretary, Association of Steel Conduit Manufacturers, 25 Bennett’s Hill, Birmingham l . t The Members of the Association are :—
ALMA & CRANMORE TUBE CO. LTD. SIMPLEX ELECTRIC CO. LTD. METALLIC SEAMLESS TUBE CO. LT[ BARLOW, H. J„ & CO. LTD. Comprising : STEEL TUBE & CONDUIT CO. ELECTRICAL CONDUITS LTD. Credenda Conduits Co. Ltd. GENERAL ELECTRIC CO. LTD. (M iddlesbrough) LTI GRIFFITHS, ISAAC, & SONS Perfecta Tube Co. Ltd. TALBOT-STEAD TUBE CO. LTD. HILDICK & HILDICK Simplex Conduits Ltd. TIPPER BROTHERS (BILSTON) LTE McDOUGALL, JAMES, LTD. Stella Conduit Co. Ltd. WALSALL CONDUITS LTD.
Advertisement of the Association of Steel Conduit Manufacturers, 25 Bennett’s Hill, Birmingham 2 August 3, 1945 E l e c t r ic a l R e v ie w 17
Single - Break METALCLAD SWITCHGEAR
Introduced Originally in 1934 and Still Pre-Eminent. SB. 18-33 kV.- 1000 MVA. SB. 24-66 kV. - 1500 MVA.
ELECTRICAL"— —— CO.. LTD. TRAFFORD PARK - MANCHESTER ...... 17.
IMPROVE YOUR LIGHTING in consultation with METROVICK'S ILLUMINATING ENGINEERS August 3 , 1 9 4 5 18 E l e c t r ic a l R e v ie w
B .I.“SAN DWICH” t y p e BRITISH PATENT No. 364710 § 3 I E W (PAPER INSULATED) V M U L .L J
FOR INDOOR POWER DISTRIBUTION With paper insulated cables of standard manufacture, “ bleeding” from the cable ends generally occurs in indoor situations or in vertical runs such as pit-shafts, where the combined action of high ambient temperatures and differences of level causes migration. As is well known, compound may be forced out of terminations. The solution to the problem of bleeding is B.I. “ Sandwich” Type Cable— a non-bleeding cable designed for any vertical head and for temperatures up to the rated maximum. In this cable there is no free compound; in the process of manufacture layers of pre-dried non-compounded paper tape are sandwiched between layers of pre-compounded paper tape, and in subsequent processes an even distribution of compound, without surplus, is obtained. Literature and Stock List on request.
BRITISH INSULATED CALLENDER’S CABLES LTD ______PRESCOT, LANCS. PRESCOT AS71 Electrical Review, August 3, 1945
w Ë Ê is ê
ELECTRICAL STEEL SHEETS FOR TRANSFORMER AND DYNAMO WORK ELECTRICAL STAMPINGS O F ./
¡i\m ' AL ALLOY SHEET FOR MAGNETIC TEMPERATURE ' COMPENSATION - HIGH FREQUENCY WORK - RELAYS
THOMAS & BALDWINS LIMITED August 3 , 1 9 4 5 20 E l e c t r ic a l R e v ie w h m ę to
You’ll have to ask your Dad ? . . . Not you ! Every live man in the Trade knows the unique merits of the Tenby W iring System. If you cannot get all the Tenby Accessories you require, at least be assured that we distribute them without favour and to the very best o f o u r ability.
19-21 W arsfon e Lane SO BIRMINGHAM, 18 Telephone: Limited CENtral 3701
R.P.457 21 E l e c t r ic a l R e v ie w August 3, 1945
nten a n c e ANSWER: N / s / V v a t a v e f *8®_A Un/ess conditions are a n d o e s severe the following ore the important oto«' n e e < r r v maintenance points
_ Keep the motor dry, and away from spray or tailing moisture.
# Avoid dirt, especially fluff, which may interfere with the cooling circuit.
# Avoid severe overload. Use calibrated over- load protection.
Q Add a little grease through the lubricators every six months. '
£ Avoid excessive heat.
0 Check fuses frequently, a fuse should not blow at less than three times the full load current of the motor.
Powei' foi* V icto*) //
BROOK MOTORS LTD Technical Advisors at I rlCESTER • MANCHESTER GLASGOW • LEEDS BIRMINGHAM • BRISTOL . SWANSEA . LIVERPOOL notti LONDON • NEWCASTLE 11 E l e c t r ic a l R e v ie w August 3, .1945
Revo S.7050 T.P. Switch and Fuses with Neutral link. 500V¡15-60Amps
END us particulars of your S requirements, there is sure to be a standard article in the com prehensive range of REVO Switch & Fuse Gear to meet the purpose.
Every piece of REVO Switch & Fuse Gear is designed and built to give service— long and trouble- free service for which it has earned a reputation second to none.
Revo S.3420. Teak Cased Fuseboard. Avail able for IS Amp!500 V. 30 Amp1250 V. 30 Amp1500V. 40 Amp!250 V. for 2-10 ways.
DELIVERY without DELAY SWITCH and FUSE GEAR The R IG H T Gear for the job REVO ELECTRIC CO. LTD., TIPTON, STAFF S. August 3, 1945 E l e c t r ic a l R e v ie w 23
S T E R 10.
X jia tiis in Type tm d o r m a u c e E l e c t r ic a l R e v ie w August 3, 1945
• ■ r . i r v r |,200-AMPERE AND 1,600-AMPERE 6 6 0 -V O L T M-Break Isolating-Switches
G s
RANGE OF CURRENT-RATINGS AT 660 VOLTS FUSES : 10 TO 600 AMPERES SWITCHES : 60 TO 600 AMPERES ISOLATING-SWITCHES : 1,000 TO 1,600 AMPERES REYROLLE HEBBURN-ON-TYNE ENGLAND August 3, 1945 E l e c t r ic a l R e v ie w 2 5 * KODAK 9 Recording Materials Available in a range of forms and sizes to meet all the demands of users of photo graphic recording instruments, e.g., cathode-ray tubes, Dudell oscillographs, etc.
RECORDING FILMS
R.60 ULTRA SPEED PANCHROMATIC RECORDING FILM A panchromatic film of extreme speed (30° Kodak or 50 Weston to tungsten light).
R.55 CATHODE RAY ORTHO RECORDING FILM An orthochromatic film of extreme speed (30° Kodak or 50 Weston to tungsten light),
R.20 GENERAL-PURPOSE RECORDING FILM A non-colour-sensitised film of medium speed and high contrast. RECORDING PAPERS
RP.30 HIGH-SPEED RECORDING PAPER A high-speed paper of moderately high contrast— non-colour-sensitised.
RP.20 GENERAL-PURPOSE RECORDING PAPER A medium-speed paper of medium contrast— non-colour-sensitised.
RP.IS HIGH-CONTRAST RECORDING PAPER An orthochromatic paper of medium speed and high contrast.
KODAK LTD.. KINGSWAY, W.C.2
FOR IMPROVED FACTORY LIGHTING with Low Initial Cost—instal DUAL
ELECTRIC DISCHARGE LAMPS No Choke Coil MADE No Condenser THROUGHOUT IN E N G L A N D No re-wiring BY S IE M E N S DELIVERY FROM STOCK Full particulars from our FOR ESSENTIAL Illuminating Engineering Dept. INDUSTRIAL INSTALLATIONS
SIEMENS, 38-9 UPPER THAMES STREET, LONDON, E .C .4 E l e c t r ic a l R e v ie w August 3 , 1 9 4 5
A development of the well-known N E Meter
0 SIMPLE ADJUSTMENTS The NE 4 Meter includes adjusting devices that are quickly and easily operated without special tools. £ FLAT LOAD CURVE The high standard of performance that characterises two- element meters is also a feature of this 3-phase 4-wire meter. % SPACE SAVING Though the meter has three separate elements, It occupies no more panel space than the standard two-element meter.
Write for leaflet No. 35618-1.
G/A30I In c r e a s e p r o d u c t io n b y August 3, 1945 E l e c t r ic a l R e v ie w 2 7
— poA* it e n te LU'B eG
W IL L MAKE PRESTCOLD w i l l r EFR1g e r a t i o n
AN everv-h o u s e h o l o w o r d J 1 if uU( This built-in Prestcold refrigerator, as shown, installed in the kitchen designed by the Wessex Electricity Co. has the Give “ W.B. & G.” the chance following important advantages : to get their teeth into /our Storage capacity of approximately 4^ cubic feel which will hold all the perishable foodstuffs for a fam ily of four. problem if it is one which Larder space rendered unnecessary. Dry goods and non- perishable foodstuffs would be kept in kitchen cupboards. involves— W a ist-h ig h door, allowing access to interior without stooping. Height adaptable by varying position of supporting frames. Il can be built into kitchen fitments with cupboard space above HOT BRASS PRESSWORK andbeiow it. Design provides for adequate ventilation of mech anism without the necessity of special air-bricks or ducting. METAL PRESSINGS OR Ice-making and ‘ cold cooking’’facilities. Most important, too, is the fact that this Prestcold MACHINED BRASSWORK refrigerator provides the food storage temperatures necessary for the proper safeguarding of perishable foods —for instance 35°F for fresh fish and poultry; 40°F for milk —and even the lower temperatures We work in ail metals and needed to store the frozen foods which will be avail able later on. In addition, it will be most economi to most specifications. cal in current consumption, using only 1 unit a day. PRESTCOLD M IG H T BINDLEY EGELL LTD PERCY ROAD, BIRMINGHAM 11
A PRODUCT OF THE PRESSED STEEL COMPANY LTD August 3, 1945 28 E l e c t r ic a l R e v ie w
Siondcvcdi& e on DENNIS
N.P.L. APPROVED for CATEGORY D.C.S Perfection In Design — Reliability In Service G. P. DENNIS LIMITED Specialists In Switchboards, Control Panels, Switch Fuses, Distribution Boards, Fuses, etc. ST. MICHAELS STREET, CHESTER Telephone 3763/4 « . LONDON OFFICE : ABFORD HOUSE, WILTON RD„ S.W.I Telephone : Victor!» 5780
BODMIN PUMPS F U L L Y GUARANTEED g c c t e f a c L X / k c a t - DALY ELECTROLYTICS TYPE O.H.P. AUTOMATIC WATER SYSTEM For Estate and Farm Water supplies and Domestic and Industrial purposes. Supplied in capacities from676/4,240 Imp. G.P.H. for Maximum Suction Lifts up to 22'-T_ r_ a — f b y '- t e S e t o u t f y o t t / e t £ ! Write for lists of complete range of GODWIN PUMPS and AUTOMATIC WATER SYSTEMS for Deep and Shallow Wells, to SOLE MANUFACTURERS. H. J. GODWIN LTD. QUENINGTON - . G L O S . DALY (CONDENSERS) LTD Telegrams: Telephone : Condenser Specialists for over 20 yean Coin St. Aldwyn 86 (3 lines) Pumps, Quenlng Wert Lo^ge Works,The Green, Ealing, WS Telephone: 434/ August 3, 1 9 4 5 E l e c t r ic a l R e v ie w 29
FOR SHIP WIRING...
YOU'RE ALWAYS SAFE WITH
[ R o m P T o n COBLES
CROMPTON PARKINSON LIMITED, ELECTRA HOMSE, VICTORIA EMBANKMENT, LONDON, W.C.2 Telephone : TBMple Bar 59} 1 Telegrams ■ Crpmpark, Estran4, London August 3 , 1 9 4 5 3 0 E l e c t r ic a l R e v ie w
QRVSELCO • LIMITED • BEDFORD August 3, 1045 E l e c t r ic a l R e v ie w 31
i re f 5 0 0
BRUSH m otors ensure the continuous flow of speeded production. Compactness and adapt ability are their out standing features. What ever the application there is a size and type to suit the most exacting need. The photograph shows a Brush m otor operating saw mill machinery, a typical application.
The B R U S H E l e c t r i c a l E n g i n e e r i n g Co.Lt d ..Loughborough , E n g l a n d .
BRANCHES: London, Manchester, Leeds, Birmingham, Newcastle, Glasgow, Cardiff, Bath, Belfast, Dublin 32 Electrical Review August 3,
' #///#
COMPANY LIMITED 12 VICTORIA STREET S.W.1
sazcell advertising August 3 , 1 945 E l e c t r ic a l R e v ie w 33
-■cuiaAuAjir^A)
¿¿J-jza ve,'t{p b
'm i w J ! " Angus/ 3, 1945 E l e c t r ic a l R e v ie w
> ISOFUSE "JtLple-yole < = ^ 2 t t A e c l
The Isofuse is a quick make and break switch
embodying rewireable or HRC fuse elements.
It is carefully designed, suit- Capacity — 15 amps ' 440 volts A.C. able for building-in, and 2. C o m p a c t — fits 5" y 5" X 5" cavity. well proved in service on * 3. Fuse access— captive thousands of machine tools. screw releases com plete fuse carrier. Its construction, making 4. Safety— positive but sound use of high-quality simple mechanical interlocks prevent die-castings and mould mai-operation.
ings, with every part inter 5. Mechanically strong (Machine Tool changeable, leaves little to standard).
be desired in performance, appearance and durability.
QUANTITY DELIVERIES WITHIN SEVEN DAYS
BROOKv _ HIRST/ Government Contract Numbers required with all orders BROOKHIRST SW1TCHGEAR LTD., NORTHGATE WORKS, CHESTER August 3, 1945 E l e c t r ic a l R e v ie w 3 5
D August 3 , 1 9 4 5 36 E l e c t r ic a l R e v ie w
L e w c o s COPPER
BRAIDS AND PLAITS of every description« O ur Price List covering a wide range of copper Braids and Cords will to «ent on application.
THE LONDON ELECTRIC W IRE COMPANY AND SMITHS LIMITED CHURCH ROAD . LEYTON . LONDON, E.IO August 3, 1945 E l e c t r ic a l R e v ie w 37
THE SECRET IS OUT!
TAW TESTED AT WORKS
Each case contains the power plant behind the ASDIC Manufactured, and in its present form designed by
THE NORMAND ELECTRICAL CO. LTD. NORTH S T R E E T • CLAPHAM COMMON LONDON S W 4 TEL: MACAULAY 3211-4 August 3, 1945 38 E l e c t r ic a l R e v ie w E l e c t r ic a l R e v ie w Managing Editor August 3, 1945 H u gh S. Pocock, M.I.E.E. Technical Editor : C o m m e r ç a i Editor : C. O. Brettelle, M.I.E.E -. H. Cosens Contents :— Page Contents continued:— Page Editorial.— Labour and Electricity 149 Transformers in Parallel. By Ind ustry in A y rs h ir e — II 151 J. E. Macfarlane, B.Sc.(Eng.), 167 Somerset Rating Decision . .155 Australian Notes. . .168 Views on the News 156 Commerce and Industry . .169 Ring-Main Calculations. By P. J. Electricity Supply . . 172 Ryle, B.Sc.(Eng.), M.I.E.E. . 157 Simplified Light Metals Control . 173 Personal and Social . . .159 Financial Section . 174 Correspondence . .162 Stud Welding .... 177 Electric Vehicle Association . .162 Electrical Contractors . .178 Electronic Ohmmeter . .163 New Patents . . .179 N e w B ooks .164 Contract Information . . .180 Production Plant Maintenance. By H. Greaves, A.M.1.1.A. . .165 Classified Advertisements 73 Electricity in Eire . . . 166 Index to Advertisers . . . 84
EDITORIAL, ADVERTISING & PUBLISHING OFFICES : Dorset House, Stamford St., London, S.E.I Telegraphic Address : “ Ageekay, Sedisc, London.” Code : ABC. Telephone No. : Waterloo 3333 135 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.”
SOLON Industrial Type Electric Soldering Irons rated at 65 watts Now available for are now available for use where a low voltage system of supply is employed. There are two models, one fitted with a round pencil bit LOW VOLTAGES as illustrated, the other with an oval tapered bit, and they will do 1 2 V . a n d 2 4 V . the same class of work as the well-known SOLONS of 65 watt rating for normal supply voltages. Their design incorporates the many special SOLON features, including the fitting of the heat ing element inside the bit. Both models can be supplied fitted Write for details of the with elements for 12 volts or for complete SOLO N range for 24 volts supply as required. low and normal voltages. Complete with 6 feet of HENLEY twin core flexible.
SOLDERING IRON fo r INDUSTRIAL USE w. T. HENLEY’S TELEGRAPH WORKS CO. LTD. Engineering Department, Milton Court, Westcott, Dorking, Surrey August 3 , 1 9 4 5 4 0 E l e c t r ic a l R e v ie w
« e A ' " 1" 6 V \ » ^ C . „ „ n o ' ^ tft>< S « * £ . \ ^ Y \ ^ ,t 0 < o i \ , * " iV
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SANGAMO WESTON METERS
SANGAMO W ESTON LTD., ENFIELD, MIDDLESEX E l e c t r ic a l
THE OLDEST ELECTRICAL PAPER - ESTABLISHED 1872
Vol. C X X X V II. No. 3532. A U G U S T 3, 1945 9d. WEEKLY
Labour and Electricity Awaiting the New Government’s Policy
HE General Election has brought of political conflict. In regard to one T about a situation unique in this aspect of the latter, these criticisms appear country. Although we have already had somewhat beside the point. Approxi two Labour Governments the party has mately two-thirds of the electricity sold never had the majority over all others to consumers is produced by publicly- which it has now gained. It seems to owned undertakings, which have vied with follow from this that the new Govern the companies in keenness to provide the ment’s line of action will be much more great and efficient public service that this socialistic than the previous Labour country enjoys. Governments found possible. What the The contribution towards winning the effects of this tendency will be remain to war made by individual undertakings is be seen—particularly the effects upon the one of which the whole electrical industry electricity supply industry, which occupied may justly be proud and for which the a fairly prominent place in the Labour public should be deeply grateful. There Party’s election programme. has been a good deal more in it than the epic story of supplies maintained or quickly Improvement—not Upheaval restored during and after enemy damage to We feel, however, that-no attempt will power stations and distribution networks; be made to transform the electricity supply there has been the ready ability to supply system overnight. As we have consistently any amount of electricity for all munition maintained, there is little wrong radically works, no matter how remotely located— with this system, although it cannot be enough in itself to furnish proof of the gainsaid that improvements are possible— flexibility that is a sure sign of an effectual more particularly in the direction of organisation. expediting certain natural trends, some of which (e.g., distribution voltages and Favourable Prices domestic tariffs) call for a greater degree In addition there has arisen out of war of standardisation as between different conditions an unprecedented demand for areas. electricity in agriculture, which could not Defects that now exist, where these are have been coped with in the way that it not a legacy of early legislative short has been in the vast majority of cases unless sightedness are, in the main, inevitable rural electrification had reached a stage results of an evolutionary process that has at which, taken as a whole, it was well in necessitated taking account of scientific advance of Continental practice. As and technical developments as and when regards the price per kWh sold for all research has made them available. We purposes, the comparison again has been are far from accepting at face value generally in favour of Great Britain, except criticisms that have been levelled against for some long-hour loads in water-power the electricity supply industry in the heat countries. Despite increasing costs of coal, August 3 , 1 9 4 5 1 5 0 E l e c t r ic a l R e v ie w
its raw material, electricity is one of the promised that there would be no attempt to bolster up uneconomic secondary in few commodities in which before the war there was a progressive decline each year dustries by means of import restrictions. in average retail charges and in which, I f water-power is since then, charges have been increased Electricity cheaper than coal it is less by very little. As there are so many more in E ire reliable, as experience in important matters with greater claim on Eire has proved. The the new Government’s attention there will, dependence of the Electricity Supply Board in our view, be ample time for consideration upon favourable climatic conditions is and discussion of this subject. And there shown by curves included in its 1944-45 is also the possibility that by the time its report and by a statement in the report turn arrives it may have ceased to be a that the dry spring and summer necessi political issue. tated severe rationing throughout the In what might be termed summer, although conditions improved Contractors’ his valedictory address later. The output of the Shannon station Report after a seven-year term as fell during the year but that of the Pigeon president of the Electrical House (steam) station decreased to a much Contractors’ Association, Mr. Walter greater extent due to the limited quantity Riggs was able to report a continuance of and poor quality of coal available. The the good relationships which have existed financial results, in spite of increased for years between his Association and the charges (raising the average price from Electrical Trades Union which, with the l-68d. to 1-85d. per kWh) was a further parallel conditions in the electricity supply loss of £324,353 ; the accumulated deficit industry, have contributed a good deal to is now £529,539. Sanction to a further electrical progress. Another important increase in prices is being sought. matter touched upon by the president was the training of apprentices. Hitherto the F u r t h e r evidence of the E.C.A. has been represented on the Build Importance importance of encouraging ing Apprenticeship and Training Council; of Research research was given by Sir this is probably of too general a character H arry R ailing in his review for the specialised electrical contracting of the General Electric Co.’s war work at industry and more satisfactory results the company’s annual meeting last week. should arise from the separate council Without the availability of the facilities of which the Association has suggested to the the research departments of the G.E.C. and M inistry o f W orks. other large industrial concerns the develop ment and production of many of the war- The trend towards self- winning weapons such as radar, ultra-short- New Zealand sufficiency in manufac- wave valves, cathode-ray tubes, etc., would M arket tured goods, electrical have been an impossibility. Both from the equipment among them, point of view of our future safety and of our has been an outstanding feature of the hoped-for improved standard of living any economies of all the Dominions in recent money spent on expanding this side of years. Possibly in none of them is that manufacturers’ activities may be considered trend now so strong as in New Zealand. well spent. This is confirmed by some remarks made I t is disappointing to last week by Mr. C. W. Bridgen (Ferranti) Electric hear from the Electric who has recently returned from that V ehicles Vehicle Association that country. He pointed out that there was an facilities for the pro absolute prohibition on the import of duction of 500 prototype vehicles has had electrical equipment such as cookers and heaters and radio sets because all these to be suspended. (Why 500 “ prototypes,” things were now made in New Zealand by the way ?) T he A ssociation says it He considered that most of the home- has “ had to accept the position that the produced articles compared very unfavour time is not propitious for the production ably with their English counterparts. te. a natlonal standard electric vehicle.” Whether this situation will continue is not he trouble seems from the Association's certain. It may be recalled that some time [5 °rt to ^ave been lack of materials— ago Mr. Nash, the Finance Minister, shoum K n0t menti°ned. Surely the time Id be Propitious ” very soon August 3 , 1 9 4 5 E l e c t r ic a l R e v ie w 1 51 Industry in Ayrshire—II Load Building Results and Prospects
TB1HERE is much of interest in the chemical siderable quantities of electricity are also JL world in this part of Scotland; the taken by the potteries and earthenware article “ Making T.N.T.” in the Electrical industries at Kilmarnock, Hurlford and Review of February 2nd, 1945, presented an Dreghorn where high-grade sanitary ware, example of what may be seen in more than sinks, cisterns, fireplaces, sewage pipes, fire bricks and wall tiles are produced exten sively. In one factory alone 404,000 kW h is consumed yearly. The principal ports are Ardrossan, Ayr, Irvine, and Troon, and each of them is
Bottle factory of the Port land Glass Co., Ltd..Irvine, which employs an electri cally-heated annealing lehr
equipped with cargo cranes of from 3 to 40 tons capacity, hoists and up-to-date elec trical conveyors for the coaling of vessels and railway sidings alongside the steamer berths. The vessels bring in raw materials one district. A factory which commenced and export coal, steel, fireclay, and so on, making nitro-glycerine in 1873 with an area and to the electrical eye it is obvious that the of 100 acres now produces all manner of high respective inputs and outputs would be very explosives and propellant powders and much lower without the aid of electricity. employs 2,400 people on a factory area of Ayr is the county town and has a romantic 1,200 acres. history, linked with Robert the Bruce in the Whisky blending is another notable far distant past and Robert Burns more industry in the area, and one of the largest and most important undertakings handling this product is “ still
At the works of the Hosiery Manufacturing Co., Ltd.; sewing machines in finishing shop going strong ” with its headquarters in Kil m arnock. The load is a considerable one and valuable on account of its long hours. Con- August 3, 1945 152 E l e c t r ic a l R e v ie w
recently. It has a population of nearly fittings, hooks and pulley bloc^ ’ 40,000, and since the formation of the Ayr works consumption is about 2,250,000 kWh shire Electricity Board its consumers and ner vear Again in this versatile community, load have risen from about 1,200 to 6,800 kW. we saw all classes of knitwear in production Ardrossan, to which a supply was first at the works of the Hosiery Manufacturing Co., Ltd. At the time of our visit 11,000 pairs of army socks were being produced per week. The whole
All-electric excavator at rock face of Hillhouse Quarries, the first in dustrial consumer of the B oard of the factory is elec trically driven and the annual consumption is of the order of 60,000 kW h. Near Troon, with its famous golf courses, are the quarries of Hillhouse Estates, given in 1923, occupies a splendid position Ltd., the first industrial consumer of the with magnificent views of the Firth of Clyde. Ayrshire Electricity Board It produces the Among its industries are oilskins, sawmilling, famous Ayrshire blue basalt in all sizes from bitumen, lubricants and pre-cast concrete 2 i in. to superdust, either clean or treated slabs, all of which show evidence of the work with tar, etc. The stone is particularly of the load builders. suitable for road making. At the rock face Irvine stands at the mouth of the river of we saw the blasted material directly loaded the same name and presents a fine harbour. into wagons by an all-electric Ruston Bucyrus It first had an electricity supply in 1914. It excavator. The material is crushed and is rich in industrial life and one of the factories screened by modern plant which is capable of we visited in the town is the bottle factory of the Portland Glass Co., Ltd., where an outstanding point of electrical interest is an electrically-heated lehr employed for annealing bottles produced in a nearby moulding machine. From the moulding machine the bottles are chain-belt fed to the
New swimming pool at Kilmarnock equipped with electrically driven wave-producing machinery
lehr which is loaded at 15 kW and thermostatically controlled. There is something like 370 kW of installed plant at this factory and the load factor is good because it is desirable to run the furnace for long periods. Also at Irvine we saw in the block works of Laird & Son, Ltd., a 1^-ton electrically driven stamping hammer producing 1,000 tons nf contributing towards the production of ships’ after drying and clemm niaca<^am daily, and c cleanm8 the rock is conveyed August 3, 1945 E l e c t r ic a l R e v ie w 153 to storage bins by endless belt conveyors. Corporation. It is electrically driven, of In addition to a 500-ton per day tarmacadam course, and by means of stroke variations in plant there are three special plants for the the driving mechanism it generates waves of production of asphalt carpeting, and macadam continuously changing shape. Many medical and chippings treated with bitumen at high men have declared that the massage effect of temperatures. T he heavy peaks of the excavator and crushing machinery have little or no effect on the supply conditions. The consumption of the quarry and its asso ciate workings is 1,000,000 kWh per annum. About 2,000 kW of electrical plant has been installed.
in the works of A. J.'M uir & Co., Ltd., exceptionally wide looms are normally engaged in manu facturing lace curtains the waves breaking against the body and of the aeration of the water in the pool caused by the breakers have a beneficial effect on the health of the bathers; so the wave machine must be a good “ load builder.” Newmilns and Darvel are two towns situated close to each other in the beautiful
Above : Polishing curling stones at M auchline. Right : Plant at the Mauchline powdered milk factory, including horizontal tubular milk heater, sugar boiler and small iacketed milk tank, milk pumps and drying chamber ( f r o n t left; Kilmarnock may be described as the industrial capital of Ayrshire. With a total popula tion of 40,000 it is the largest burgh in the county, and en gineering in its widest sense is probably its most outstanding industry. Among other things it is the home of Glenfield & Kennedy, Ltd., whose products arefamiliarto powerstation men. At Kilmarnock there is a new swimming pool which is equipped with artificial wave- production apparatus manufactured by Glen- Irvine valley ; they have similar industrial field & Kennedy, who presented it to the interests which lie in a world reputation for August 3, 1945 1 5 4 E l e c t r ic a l R e v ie w high-grade laces, brocades, madras, nets and Grav Jenson spray-drying one. Thevvholeof muslins, etc. Our investigations took us into the plant is of stainless steel, and the mam the works of A. J. Muir & Co., Ltd., where electrical application is the driving of pumps we saw exceptionally wide looms which are The milk is first pumped to storage tanks and normally engaged in the manufacture of lace then heated by steam tubes and so pre-con- curtains. There is about 100 kW of load at denred The condensed milk is sprayed into a this factory' and the annual consumption is dry ing chamber. Heated air is simultaneously about 65,200 kWh. One of the most ancient supplied to the drying chamber by a motor- burghs in Scotland is Prestwick, whose value driven fan. the hot air mingling with the as a future load-building development ground spraved milk to produce instantaneous depends largely on its promise as an air port. drying. The powder falls to the bottom of During wartime the aerodrome has certainly the conical drying chamber and is sucked out made very extensive demands on the elec by fans and delivered to hoppers. The tricity' undertaking. factors" consumes about 200,000 kWh per Mauchline is the home of a famous old vear. industry and a notable new industry. The At Galston, a little town in the centre of first is the production of curling stones at the the rich agricultural district east of Kil works of Andrew^ Kay & Co., Ltd. These marnock, there is the busy blanket works of stones are the implements of an ice sport the Scottish Co-operative Wholesale Society, which flourishes in Scotland and Canada : Ltd. The first group of processes there are the Dominion represents the largest market similar to those in most textile factories and for the stones. The raw material is rough consist of w ool blending, willeying, oiling and granite from Ailsa Craig, and blocks of this, teasing, carding, spinning, winding, warping roughly circular in shape, are chipped by- and weaving. Finishing involves cleansing hand and then subjected to lathe cutting and and de-greasing and carbonising by which the blanket is treated in vitriol to bum the vegetable matter without affecting the wool. After drying, following this treatment, the blankets are passed through pressure rollers which grind out all
Blanket making at Galston : shrinking machine rear left, centrifugal dryer, right front, picking out knots and loose ends from blanket, rear right
the carbonised matter. The vitriol is then neutralised by treatment of the blanket in a strong solution of soda to preserve the colour. Shrinking in a soap solution and rinsing in cold water cupping before being ground on carborundum are lollovved by hanging out the blankets in a blocks. Finally they are polished whilst sulphur atmosphere to bring out the colour revolving in suitable heads under polishing and introduce a protective agent. After final mediums held down by weighted lexers. drying, blankets for the English market are Two 10-HP motor group drives in this factory- have replaced a 46-HP gas engine. V' UP on a raising machine, while the The factory normally consumes about w - - Ct' for r^e slerner Scottish breed are 10,000 kWh and turns out about 2,000 , UT^)a!-ec- In this factory' there is about pairs of stones per year. S iim C: ™ot°rs installed and the con- The new- industry is the production o f ° Ut 125-0°0 kW h p e r year. pow dered milk at the factory- of the Scottish G a ra o c k ' 'said ^ h e ** SPT ° f Milk Powder Co., Ltd. In peacetime this A yrshire ?. . finest cascade in factory handles by-products such as skimmed established kvTshfie °f another weU* milk and butter milk, and the process is the at the works of \y lljFead makin=- k j . Knox, Ltd. Of out- August 3, 1945 E l e c t r ic a l R e v ie w 1 5 5
standing interest at this factory is the hackling building in Ayrshire involves the hard î mac machine which combs out partly-processed work of personal interviews, largely by flax. Bundles of the flax are held in re the district superintendents, coupled with ciprocating members on either side of the goodwill and a full appreciation of the technical background con ditions at the power station and on the distribution system. In the domestic field the absence of local show rooms in the rather
Hackling machine at Kilbirnie which combs out flax for thread m aking
scattered districts is com pensated for by the use of a mobile showroom in the form of a converted petrol bus, well appointed with the usual domestic showroom equipment, in cluding cookers, wash boilers and water heaters. The following figures re machine which lower and raise the flax present, respectively for each item, the between rollers carrying pins. The flax is connected apparatus hired out by the then passed on to spinning machines similar undertaking and the privately-owned to those in a modern textile factory. The connected apparatus.—Cookers 2,323 and loading and consumption of this factory are 3,200; water heaters 237 and 830; wash about 1,300 kW and 2,000,000 kWh per boilers 60 and 970; fires 870 and 24,650. year, respectively. Because of the very great personal attention The many industries referred to in this necessary to obtain permission from so article represent only a cross section of the many consumers for us to visit their whole, with a view to depicting the varied factories, we feel that the usual acknowledg nature of the ground on which the load ment of help and facilities is quite builders have to work. With such a diversity inadequate. We can only hope that the of interest the electricity undertaking staff enthusiasm of Mr. William C. Bexon, the cannot specialise to such an extent as in chief engineer and manager, has been areas where one industry predominates. Load reflected in what we have written.
Somerset Rating Decision HE South Somerset and District Electricity income tax and should not for the purpose of T Co., Ltd., succeeded before the Rating rating be deducted from gross receipts. It was Appeals Committee of Somerset Quarter Sessions stated that the cumulo rating figure before at Taunton last week when it was respondent the County Valuation Officer’s new assessment in to an appeal brought by the Somerset County 1943 was £7,453. Valuation Committee against the decision of Mr. Comyns Carr, K.C., for the Electricity the Yeovil Area Assessment Committee in Company, said the appellants were seeking to respect of the rating of the company’s under take advantage of the increased profit-making taking in that area. Mr. G. D. Squibb for the ability of an electricity undertaking, which at County Valuation Committee, said there was present went to the Government, and put it a cumulo valuation of the whole undertaking on into the pockets of the ratepayers. He argued a profit basis which was agreed, subject to the that the company’s point that E.P.T. should be point at issue, at £15,042. The point at issue deducted before arriving at the net receipts was that the Excess Profits Tax paid by the for rating, which had been accepted by the company should be deducted from the gross Assessment Committee, was the correct inter receipts in order to arrive at the net receipts pretation of the matter. The Committee figure for rating purposes, but it was submitted confirmed the Assessment Committee’s decision for the County Valuation Committee that E.P.T. and dismissed the Valuation Committee’s was indistinguishable for rating purposes from appeal with costs. August 3, 1945 1 5 6 E l e c t r i c a l R e v ie w Views on the Vews Reflections on Current Topics
EFUTING an accusation that his com much to be gained over the use of the more pany had been dilatory in developing conventional form of time switch, but I had supplyR in its area, Mr. W. R. T. Skinner, better remind those who wish to employ this general manager of the North Lincs. & device that the restrictions regarding shop- Howdenshire Co., has told the Caistor R.D.C. window lighting still apply. that 43 out of 44 villages with a population of * * * over 500 are now receiving a supply, 40 out of 58 with populations of between 250 and 500, In last week’s Electrical Review it was and 51 out of 134 with populations below 250. reported that the Liverpool Electric Power & But apparently company undertakings can Lighting Committee was seeking the City never do right for a member of the Council Council’s sanction to the employment of said:—“ The large villages pay them jolly German prisoners of war in the laying of well and they have probably done very well cables to temporary houses. At its last week’s there. But we have to remember the wider meeting the Council debated the general responsibilities in the whole rural district.” question of the employment of prisoners on It seems to me that the companies generally housing estates and decided that they should are dealing with their responsibilities “ jolly be used only if British labour was not avail well ” in not very encouraging circumstances. able. The Ministry of Works is to be asked to press for the early~ release of building workers from the Forces. A member of the A pointer to the growing popularity of Council proposed that prisoners should not electricity for domestic purposes is given by be employed on cable laying but, I am sorry results of a questionnaire sent by the Billing- to see, the Council was counted out during ham-on-Tees Urban District Council to local the discussion and the subject was shelved residents on the subject of the use of elec until the September meeting. tricity or gas in future Council houses. One hundred and nine persons preferred electricity for cooking and forty-seven gas. Those in The Board of Trade announcement relating favour of electric washing facilities numbered to the continuing of the trading and industrial 111, while those who wanted gas were forty- estates in “ Development Areas ” and the five. Electric fires received 124 votes, gas establishment of new ones is of particular only twenty. It is not surprising therefore interest to manufacturers or prospective that the Council has decided to have their manufacturers of electrical appliances, especi future houses all-electric. Many other ally the lighter types of domestic apparatus. councils would probably come to the same The estates are especially suitable for the conclusion if they took the trouble to discover establishment of factories for producing this the wishes of their tenants. type of equipment and although a few * * * electrical firms have already availed them selves of the facilities offered at existing As a sequel to its reference (which I men estates I have always been surprised that there tioned the other week) to the ingenious con have not been more. The shortage of labour sumer who used an electric kettle to heat her anticipated for some time to come adds an bath, “ Contact ” (the staff journal of Central London Electricity, Ltd.) now tells of a small additional point in favour of the estates, the shopkeeper who wished to leave his window sites of which have of course been selected lighting on till late in the evening, although with a view to eliminating unemployment in he did not live on the premises. He had an areas most likely to become “ depressed.” ordinary alarm clock with the bell taken off Altogether the existing and proposed estates and the clapper attached to the trip lever of a aim at giving employment to over 100,000. break-back mousetrap by a piece of strong * * * thread. The clock was on a small shelf and the mousetrap was screwed on to the wall. ^ i.,r.?,ad/ ecen,tly,of' a case at Henley in which At night, on leaving the shop, he set the trap, wife wbccSC as a Brazilian diplomat’s with a piece of whipcord from the trap to the r fel" ,vSr m0ned for the non-payment of dolly lever of the light switch, which was m a tfc priviiege'^bnt S% pleaded “ d‘pl°- pulled up when the trap was sprung by the maeistratp^ « ... , the unsympathetic clock. He said it never failed, and the con paym ent ThfcVertheless m ade. an order for traption cost him only 4s. 3s., including o f the “ benefitSerm^ t0 akdn to a revival 3s. lid. for the alarm clock. With the once considered a ,rgy ” P]ea which was present difficulty in obtaining alarm clocks and their increased price there is not so all sorts o f trouble^ven^SeT^ °Ut ^ —REFLECTOR August 3, 1945 E l e c t r ic a l R e v ie w 157 Bing-IIam Calculations Accelerated Trial and Error Approach
N calculations of voltage con- By P / Ryle, straightforward calculation, the ditions round a projected ring ' * '' correct voltage drops to all the tap I M.I.E.E. main some degree of trial and error ' "e ’ points. Unfortunately almost in approach is usually unavoidable. The division variably in practice the busbar voltage is given of the total current from the supply busbar be and the tap demands are simply in the form of tween the two limbs of the ring is, of course, the kW or kVA at some power factor. In order to prime unknown. It appears to be customary, initiate calculation it is necessary to convert as the first step, simply to assume some likely the tap demands to currents and therefore value for one of these currents, and from to make initial assumptions as to the voltages this to work round the ring and to find the at the tap points. Since the assumed tap errors which result from the assumption. voltages will be incorrect, the values of the A new adjusted value for the limb current is tap currents assumed will also be incorrect, then taken, and trial and error methods are so that one or two subsequent approach continued until a sufficient degree of agree calculations become necessary. ment with the stated conditions is reached. As an example take a 33-kV busbar The first (and also subsequent) approaches feeding ring consisting of four sections of to the correct value of current along the overhead line as follows:—Z,, 10 miles chosen limb may, however, be calculated of 015 sq. in. line, total impedance 2-9 + directly and rationally j6 ohms ; z 2, 15 miles by the following 1. I 2 of 01 sq. in. line, total method, which will impedance 6-6 + j9-45 Ia generally result in a / .--Z ohm s; Z 3, 10 miles o f much quicker converg 0-1 sq. in. line, total ence to the correct impedance 4-4 + j6-3 answer. It is assumed ohms; Z4, 15 miles of that line charging 015 sq. in. line, total B current is negligible. im pedance 4- 35 + j9 Referring to Fig. 1, \ \ * 1 ohms. Z = 18-25 + I n - i representing a ring of j30- 75 ohm s, Z 2 + Z 3 + Z 4 = 15-35 4- j24- 75 “ n ” sections, let I1; Fig. I.—Ring main of I 2j I 3...... 1Q 1 fiti ohm s, and Z 3 + Z 4 = the various tap-point currents, Ia and IB 8-75 + j 15-3 ohms. Loads at tapping points: the limb currents from the supply busbar AB, Px = 6,000 kVA at 0-85 power factor lag; Zx, Z2, Z3 Zn the impedances of the P2 = 3,000 kVA at 0-95 power factor lag; various sections of the ring between tap P3=4,500 kVA at 0-9 power factor lag. points, and Z=the sum of Z1; Z2...... For the first step, since nothing is known Zn = total impedance round the ring. All as to the actual voltages at the tap points, the above are complex quantities. assume the voltage at all taps to be equal in Then, starting from A, the total vector magnitude and phase to the bus voltage. voltage drop round the ring from A to B is Then, taking bus voltage as reference Ia Z x+ (Ia-I x) Z2+(IA- I 1- I 2) Z3 + ...... vector, 19060 V (star), l4 = 89- 8—j55-7 A, + (I a — Ii — I 2 — ...... — In— 1) Zn. Ia= 50—jl6-4 A, I3=71-1—j34-5 A, Ix + I2 + This must be zero, since A and B are on the I 3 = 210- 9 —j 106- 6 A. A nd from equation (1) same busbar. Therefore, rearranging Ia = (89-8 - j55-7) (15-35 + j24-75)+ (50- Ia (Z x + Z 2 + ...... + Zn) = I x (Z 2 + Z 3 + j 16-4) (8-75 + jl5-2) + (71-1 - j34-5) + Zn) + I2 (Z3 + Z4 + ...... + Zn) + (4-35 + j9)/l8-25 + j30-75 = ^ ^ ; +In-i Zn whence IA = Ix Z (Z 2 . . Zn) + I2 27 (Z 3 . . Zn) + ■ ■ "f In — xZn ^ ♦The method of dividing one complex quantity by another involves the removal of imaginary quantities from the divisor. This is done by multiplying both and, of course, Ib=27(Ix + I2 + .. + In_ x)—I a. numerator and denominator of the original fraction by If a ring problem were presented in this the original denominator with the sign of its imaginary part reversed. Thus form, with definite given tap currents, equation 5 + j 8 ( 5 + j8 ) (4 — j3) 44+ J17 44 + j!7 _ t .?6 , ■ .6g (1) would directly give IA and thus, by 4 + j3=*(4 + j3) (4 - j3)= 42 + 32 - 25 — ^ J E l e c t r ic a l R e v ie w August 3, 1945
= 117-6—j62 4 A, andIB= I1 + I2+ I3-lA = appreciable percentages. A high degree of 93-3 — j44-2 A. accuracy is therefore rarely justifiable. For From this first approach, the voltages at very many practical problems (i.e., those in the tap points can be calculated as follows: which voltage regulation is nowhere excessive) Drop to tap point 1=IA Z1 = (117-6— j62-4) a quite adequate degree of accuracy may be (2-9 +j6)=715 +j525 V. Star voltage at tap obtained as follows:— point 1, V1=19,060-(715+j525) = 18345- (1) Calculate only the first approach, as j525= 18350 V=96- 3 per cent, of bus voltage. above, on the initial assumption that all tap Drop to tap point 2= IA Zj+OU—Ii) Z2 point voltages are equal to bus voltage, and = 715 + j525+ (27-8 - j6-7) (6-6 + j9-45) = thus arrive at first approximations to the 962 +j744 V. Star voltage at tap point 2, voltage regulation at each tap point. V2 = 19,060 - (962 + j744) = 18098-j744= (2) If first approach regulation at any 18120 V=95-l per cent, of bus voltage. particular tap point is p per cent., take the Similarly (omitting steps), star voltage at tap final regulation at that point as p point 3, V3 = 18270 V=95-9 per cent, of bus x voltage. Thus, if the first approach were to give the (Checks of the current and voltage calcula regulation at some tap point as 8 per cent., tions can be obtained by working round the ring in the opposite direction, starting with take as the final result for this point 8 x IB instead o f IA.) = 8-7 per cent. Ignoring Phase Differences The calculations for IA and IE can be made somewhat less laborious when the ring For most practical ring calculations it is consists entirely of one type and size of line. sufficiently accurate (at any rate in the first Thus, if the ring consists entirely of lines of steps) to ignore phase differences between the impedance (r+jx) ohms per mile, all the bus voltage and the tap voltages and to take impedances Z x, Z2, etc., and Z may be written account only of the voltage magnitudes. in the form (r+jx)F, where L is the corres The three tap voltages obtained above are ponding length in miles. The term (r+jx) all below bus voltage and therefore since the therefore cancels out in the numerator and tap demands are given in kVA, the tap denominator of the fraction in equation (1) currents must be adjusted upwards; try and IA= I X (L 2 F 3 .... Fn) — I2 (L3 + upward adjustments inversely proportional to the voltages. The tap current values for L4 + .... + La) —.... — Ln }(Ln) L x + L 2 + the next approach are then:— .... + L n ...... (2) The denominator of the fraction is here Ii= ^j-(8 9 -8 _j55-7) = 93-3 -j57-9 A, free from imaginary quantities. If the ring includes sections of double = Tgjy ~ j1(’-4) = 52-6—jl7-2 A, and circuit line (of the same size as other single 1 circuit sections), the lengths of such sections I 3 = (71-1 —j34- 5) = 74-2 — j36 A. •959 can simply be written in equation (2) at half their true route lengths. From these, omitting the calculations, Ia = 123 - j64- 8 A and IE = 97-1 - j46- 3 A. Same Tap-load Power Factors Assumed V i, V 2 and V 3= 9 6 - 1, 94- 8 and 95- 7 per cent, of bus voltage. Considerable further shortening of calcula These voltages now differ little from those tion is also possible if all the tap-load power obtained at the first approach, so that the factors are the same, an assumption often results may be considered sufficiently justifiable for many somewhat conjectural accurate. If not, further similar steps must future supplies. If this power factor is be worked out, taking, if necessary, account cos
The General Election.—In the big swing-over for London and South-East England to resume to the Labour Party revealed by the declaration his duties with the County of London Electric of the General Election figures last week former Supply Co., Ltd., of which he is a director and members "having associations with the electrical manager and secretary. Sir John will continue industry had varying fortunes. Sir Arnold to act as chairman of the Public Utilities Coal Gridley (Balfour, Beatty) retained Stockport; Committee. Sir Peter Bennett (Joseph Lucas, Ltd.) held Mr. Leslie Gordon, clerk and solicitor to the Edgbaston, Birmingham, where he succeeded London and Home Counties Joint Electricity * the late Mr. Neville Chamberlain in 1940 ; Authority, is due to retire on superannuation on Lt.-Col. Sir Cuthbert Headlam, Bt. (Northmet August 18th, but has agreed to continue his Co.) was again successful at Newcastle North; service for a period not exceeding twelve Sir W. W. Wakefield (Radio & Electrical months. Developments, Ltd.) remains member for St. Marylebone; and Sir Andrew Duncan is still Mr. R. H. M. Drake is the new president of the one of the members for the City of London. Electrical Contractors’ Association; he succeeds On the other hand Mr. Walter Higgs (Higgs Mr. W. Riggs, who has served as president Motors, Ltd.) was defeated at West Birmingham; throughout the whole term of the war in Europe. Sir Oliver Simmonds (head of the Simmonds Mr. Drake, who is chairman of Drake & Group) at Duddeston (Birmingham); Lord Gorham, Ltd., has occupied the office before— Dunglass (County of London Co.) at Lanark; in 1936-37. Sir A. G. Erskine Hill (Balfour, Beatty) at North Mr. W. M. Craig, B.Sc.(Eng.), A.M.I.F..E., Edinburgh; and Capt. L. F. Plugge at Chatham. A.M.I.Mech.E., has relinquished his position as Mr. R. R. Stokes (Ransomes & Rapier, Ltd.) assistant chief engineer to High Duty Alloys, held ■ Ipswich for Labour. Among the new Ltd., which he has held Labour members are Mr. A. M. F. Palmer, since 1940, to become a A.M.I.E.E. (Wimbledon), author of the Fabian director of Holliday, Society’s pamphlet on “ The Future of Electri Hall & Stinson, Ltd., city Supply ” ; Lt.-Col. L. J. Edwards (Blackburn) electrical engineers and secretary of the G.P.O. Engineering Union; contractors. His acti Mr. H. W. Wallace (Walthamstow, E.), Mr. vities will be chiefly W. R. Williams (Heston and Isleworth) and concerned with plant Mr. H. E. Randall (Clitheroe), Post Office installation in the heavy, Workers’ Union; Mr. F. Lee (Hulme, Man industries. Mr. Craig chester), chairman of the'Metropolitan-Vickers commenced his en Works Committee ; Mr. C. R. Hobson gineering career with (Wembley) a power station engineer; Mr. F. A. the English Electric Co., Cobb (Elland, Yorks.), a radio engineer; and Ltd., at the Stafford Mr. T. F. Cook (Dundee), an electrician. Mr. W . M. Craig Works, and from there Major G. Lloyd George,, the former Minister was transferred to the of Fuel and Power retained his seat at Pembroke company’s Bedford office as technical sales as a Liberal. engineer. Ministerial # Appointments.—Mr. Attlee, the Alderman Robert John Hall, J.P., has been Prime Minister, announced the first appoint appointed a director of British Insulated ments in the new Government last week-end. Callender’s Cables, Ltd. Alderman Hall is a They included the names of Mr. Hugh Dalton, member of the Mersey Docks and Harbour who becomes Chancellor of the Exchequer, and Board and chairman of the Overhead Railway Sir Stafford Cripps, President of the Board of Co. He was Lord Mayor of Liverpool in 1935-36. Trade. Mr. Dalton was President of the Dr. S. Wernick has been elected president Board of Trade in the National Government of the Electrodepositors’ Technical Society in and Sir Stafford Cripps was Minister of Air succession to Dr. J. R. I. Hepburn. Dr. Wernick craft Production. has been honorary secretary and editor of the Sir Eugene Ramsden, a director of British Society for many years past. Insulated Callender’s Cables, Ltd., the Yorkshire Electric Power Co. and the North Lincolnshire Mr. E. C. Best is retiring from the position & Howdenshire Electricity Co., Ltd., who was of district electrical assistant, Nottingham, to created a baron in the King’s Birthday Honours the London and North-Eastern Railway. List in June, takes the title of Baron Ramsden of Mr. Frederick Colin Burstall has been appointed Birkenshaw. to the board of the Automatic Telephone & Sir John Dalton is relinquishing the position Electric Co., Ltd. Before joining the company in of Regional Controller of Fuel and Power 1931 Mr. Burstall was Deputy Inspector I>t E l e c t r i c a l R e v ie w A ugust 3, 1945 1 6 0 General of the Egyptian State Railways, Posts Mr. 'F. Aust, M.Sc., A.M.Inst.C.E., and Telegraphy, to whom he was secdnded from A.M.I.E.E., who has been head of the Electrical the British Post Office in 1925. Mr. Burstall was Engineering Department of Rugby College of educated at Magdalen College School, Oxford, Technology and Arts since 1923, will retire at and commenced his career in telecommunica the end of the present term. He will be suc tions with the National Telephone Co. in 1904. ceeded by Mr. A. Draper, B.Sc., A.M .I.E.E., who He-is chairman of Hivac, Ltd., and a director has been chief lecturer in the Department since of Elexcel, Ltd. 1929. Mr. W. H. Metcalfe, A.M .I.E.E., who as Bradford Corporation has recorded apprecia announced recently has been appointed engineer tion of the services of Mr. G. Flett, power station and manager of the Morley Electricity Depart superintendent, who has retired after thirty-two ment, has been engineer years’ service. and manager of the Mr. F,. N. Evans, A.M.I.E.E., has joined . Bacup undertaking since Hocking & Orchard, Ltd., Bristol, as technical 1931. Bom in High engineer, and will handle the products of Lanca bury in 1897, Mr. Met shire Dynamo & Crypto, Ltd., and their asso calfe went to Wakefield ciated companies, in the West of England. Academy and the Insti Mr. Evans has been associated with Spillers, tution of Technology, Ltd., millers, since 1925, being appointed chief Wakefield, completing electrical engineer at the company's Avonmouth his training with the Mills in 1936. He takes up his new .duties on Wakefield Light Rail August 15th. way and the Yorkshire Mr. Thomas Poad, of A. Reyrolle & Co., Ltd., (W.R.) Electric Tram is shortly leaving the Construction Department ways Co. After serving of the company to join the London contracts Mr. W . H. Metcalfe in the Forces from 1915 staff as a sales engineer. He has been responsible to 1919, he became for the completion of many of the firm’s major engineer assistant to the latter company, and projects, principally in connection with the two years later was appointed resident engineer South-East England grid scheme, including the to the Pontefract Electricity Supply, a position substation at Little Barford. he held until going to Bacup. Mr. Metcalfe has served on the N.W. England and N. Wales Mr. Ernest Taylor, B.Sc., A.M.I.E.E., who Area Committee of E.D.A. since 1937, and is at joined the technical staff of the South-East Eng present chairman of the committee and represen land District of the Central Electricity Board in tative on the E.D.A. Council. He has 1935, is shortly to take up an appointment as represented the employers’ side for Group E electrical engineer with Simon Carves, Ltd., being on the N.W. Area of the D.J.B. for the Electricity responsible for the electrical side of the company’s Supply Industry since 1942, and is a represen contracts. Mr. Taylor was a student of Man tative of the I.M.E.A. on the local Advisory chester University and, after a period with the Committee of the National Register of Electrical Lancashire Electric Power Co., spent four years Installation Contractors. at the Willesden works of the B.T.H. Co. At a At a recent meeting of the Wallasey Electricity gathering of the C.E.B. Technical Department at Committee the chairman referred in sym Aldwych House on July 27th, Mr. Taylor was pathetic terms to the illness of Mr. B. T. Hawkins, presented with a cheque by Mr. J. Williams, the electrical engineer and manager and to his technical engineer for South-East England. impending retirement at the end of the month. Mr. E. R. Wilkinson, M.I.E.E., commercial The Committee placed on record its appreciation manager of the Central Electricity _ Board, is to of his services over a period of twenty-four serve as president of the Association of Super years. As we recently reported, Mr. Hawkins is vising Electrical Engineers for a further year. being succeeded by Mr. R. E. Golding, deputy He will deliver his presidential address at the borough electrical engineer of Great Yarmouth. Association’s meeting on October 16th, at the Grimsby Corporation is inviting applications Lighting Service Bureau, Savoy Hill, E.C.2. for the post of borough electrical engineer in Mr. James S. Clinton has resigned from the succession to Mr. G. W. Parker, who is retiring. position of city electrical engineer of Salisbury, Mr. G. E. Collier, A.M.I.E.E., assistant sales Rhodesia, to take up consulting work. manager, Edinburgh Electricity Department, Mr. C. E. Tavener has been appointed a has, been appointed consumers’ engineer in the director of the Globe Telegraph & Trust Co., Stafford Electricity Department. Mr. Collier Ltd. who has been at Edinburgh for seventeen Messrs. M. G. and R. W. Weekes, chartered years will take up his new duties in September. civil engineers, have amalgamated their consult Mr. L. W. G. Russell, meter superintendent in ing practice with that of Howard Humphreys the Hackney Electricity Department, has been & Sons, of 17, Victoria Street, Westminster, re-designated “ meter and test superintendent ” S W.l, in whose name the joint practice will be and transferred from Grade 8 of the N.J.B. carried on in the future. Mr. M. G. Weekes is Schedule to Grade 5. retiring for reasons of health and Mr. R. W. August 3, 1945 E l e c t r i c a l R e v ie w 161
Weekes is resigning from the practice, having been elected to the board of the Harland En Reinstatem ent ill gineering Co., Ltd., with whom he has decided to continue his wartime association. Riiiploym eiit Sheffield Corporation is advertising in this, City of London Co. Case issue for a deputy to the general manager and HE Umpire under the Reinstatement in engineer at a commencing salary of £1,100. Civil Employment Act, 1944, has given a The vacancy arises from the recent appoint Tdecision in favour of the City of London ment of Mr. R. H. Coates as engineer and Electric Lighting Co., Ltd., in a case brought manager of the Portsmouth undertaking. against it by a former employee. This employee, Blackburn Corporation is advertising a Mr. G. A. Spacey, a substation attendant who further vacancy—that of technical superin had been in the company’s employ for fifteen tendent (salary £664). The Corporation is years, left for war service on August 5th, 1943. already seeking a deputy electrical engineer, a His war.service ended on February 2nd this consumers’ engineer and an assistant station year at the beginning of 56 days’ leave pending engineer. discharge, during which period he was available Miss C. Haslett has returned by air from a for civil employment. four-week visit to the Middle East where she Having failed to obtain employment on oral has been lecturing to Forces men and women application he made a formal application for in the big cities and desert camps. reinstatement through his Local Office. The company replied that owing to loss of business through enemy action it had no employment to Obituary offer him, whereupon Mr. Spacey, on February 28th, applied to the Reinstatement Committee Mr. Walter William Cole, who had been on under the Act alleging that his rights were being the staff of the Newcastle Electric Supply Co. denied to him. On April 19th the Committee for over .thirty years, died on July 23rd. He ordered the employers to make employment joined the company from the forerunner of the available to the applicant and made a further British Electrical Development Association, the order for the payment to him of compensation Joint Electricity Supply Publicity Committee, amounting to £26 for the loss suffered, or likely having been its first paid official, and having to be suffered, by the applicant by reason of their charge of its offices in Tudor Street. In the default. 1914-18 war he served in the Royal Engineers Leave to appeal was given. The first ground (wireless section). of appeal was that at the time of the Com Mr. O. S. Pratt, B.A., of the Mullard Radio mittee’s decision it was not reasonable or prac Valve Co., died on July 22nd. Upon leaving ticable to re-employ the applicant without dis Sidney Sussex College, Cambridge, he joined charging some other employee and this was the company at Balham in 1924 as chemist, and illegal without the permission of the National in 1934 became head of the Technical Depart Service Officer under -the , Essential Work ment. In 1937 he also took control of the (General Provisions) Order; the decision on an experimental and final test departments, application made by the company for this per becoming chief valve engineer in 1938. Since mission had not been received at the date of the 1943, Mr. Pratt had been technical adviser on hearing. valves, and was largely engaged on liaison work Umpire’s Views with Government Departments and on Govern ment committees. In the Umpire’s opinion there is no reason to doubt the sincerity of the desire of the company Mr. A. G. Cutts, chief electrical engineer at to perform its obligations and to reinstate the the Hawarden Bridge Ironworks of John applicant at the first opportunity. There was a Summers & Sons, Ltd., died a few days ago at short delay before the company applied to the the Chester Royal Infirmary. He was fifty- National Service Officer for permission to dis nine. charge another man and that application was Mr. R. C. Porter, formerly senior lecturer in in respect of one man only. Nevertheless it is mechanical engineering and director of the considered that there is no reason for inferring power station at Birmingham University, died that this militated against the earlier employ on July 27th, at the age of seventy-three. ment of the applicant. On the evidence the Umpire finds that the company has discharged Mr. G. O. Craib.—The death, in London, ¡of the onus of proving that it took the applicant Mr. George Oliphant Craib, secretary of the into employment at the first reasonable and Midland Counties Electric Supply Co., Ltd., practicable opportunity and he disagrees with is reported. the implied finding of the Reinstatement Com Flight-Sergt. P. J. N. Eve.—We regret to learn mittee that this was not the case. He decides of the death on active service in the Far East of that the company’s appeal shall be allowed and Fiight-Sergeant P. J. N. Eve, son of Mr. J. L. the orders made by the Reinstatement Committee Eve (J. L. Eve Construction Co., Ltd.). set aside. August 3 , 1 9 4 5 162 E l e c t r i c a l R e v ie w CORRESPONDENCE Letters should bear the writers' names and addresses, not necessarily for publication. Responsibility cannot be accepted for correspondents' opinions.
Nameplate Information or leave it. The present method by which electrical men eagerly go after new business WN many factories plant is continually must cease. It is this eagerness which has so being moved on account of alterations to puzzled men with official minds, for while it improve output and because new designs had led to prosperity it has also produced need different machinery. Electrical equip variety in tariffs and to the official type ment supplied for certain duties consequently uniformity is more important than increased becomes temporarily “ stores stock ” or has business and reduced charges. It will be no to be remounted. good ringing up the treasurer’s secretary to When the factory engineer has this work see if anything can be done to bring in new to do he is often faced with the problem of business by varying the tariff, he will reply that providing new foundations and lifting tackle the treasurer has something else to do than to capacity. Would it not be useful to have the run after the electrical engineer. Which is weight of apparatus stamped on the name true enough and a sufficient reason for leaving plate, particularly in the case of motors which electrical administration to experts who under- are often mounted on wall brackets ? stanffitheir business. H e a v y W e i g h t . Tynemouth. C. T u r n b u l l . Treasurers and Engineers T»*AY I add a note to my letter in the Elec- Electric Vehicle Association trical Review of July 20th on “Engineers fl'HOUGH its main work has been in the and the Public.” The Newcastle-on-Tyne -*■ direction of planning for the future the City Council has decided to put the adminis Electric Vehicle Association of Great Britain, tration of trading departments into the hands Ltd., can claim solid progress in several of the treasurer and this will be used as a directions during 1944. Its annual report lever to augment the status of the treasurers records that Crossley Motors have joined the Association and that the applications of certain in other towns in a similar manner. The other concerns are under consideration. As a treasurers have been hammering away at this result of advertising and other activities 149 for some forty years mainly by maintaining inquiries have been dealt with during the year. that tariffs have too much variety. The idea A specially useful piece of work accomplished in their minds is that a unit is a unit and it is was the production by E.D.A. of a summary as absurd to make different charges for a of the current battery charging tariffs of 250 unit as it would be to make different charges electricity supply undertakings, and steps to per lb. for tea taken from the same canister. secure further information of this kind are to be taken. Some of the battery manufacturers Talk to them and finance committees about are willing to co-operate in the production of load factor, power factor, diversity factor and a standard type of battery and it only remains other such matters and they do not under for the final design to be settled. The British stand it and in private conversation the Standards Institution has been asked to set treasurer will probably explain that these are up a panel to reconsider the standardisation of engineers’ ideas and can be disregarded. fittings and accessories for electric vehicles. The splendid results obtained by electricity Negotiations with the Ministry of Supply departments with low charges and big con for facilities to produce 500 prototype electric vehicles have had to be suspended and the tributions to the rates are forgotten. Cases Association has had to accept the position have happened where the town has promoted that the present time is not propitious for the a costly Bill in Parliament and some thousands production of a national standard electric of pounds have been debited to electricity be vehicle. However, contact with the Ministry cause two or three unneeded electrical clauses is being maintained with the view to ensuring were inserted in it. The proposals now being that the materials will become available for put forward would reduce the electricity the production of vehicles as soon as possible, departments to the status of a Government and steps are being taken to enlist the interest Department. If a man wishes to introduce a and support of other Government Departments. Contact has been established with the Auto new industry into a town and requires matic Transportation Co. of New York to special terms he will be told to take the tariff secure data on electric vehicles in the U.S.A. August 3, 1945 E l e c t r ic a l R e v ie w 163 Electronic Oliinnieter For Insulation Tests and Measuring Resistivity of Fluids
A N electronic ohmmeter that is described regarded as almost independent of valve as being suitable for various kinds of replacement. Both valves operate well within insulation tests as well as for measuring the their rating and long life is assured. resistivity of fluids, with the aid of appropriate Three standard resistors, one for each range, electrodes and associated equipment, is are in series with the resistance under test and announced by Jackson Automatic Electric give multiplying range factors of 1, 10 and 100. Controls, Ltd., Windsor House, Victoria These resistors are of the cracked carbon Street, London, S.W.l. The instrument is film high stability type and are accurate to within 2 per cent., possessing low temperature coefficients. For portable meters or where mains supply is 1 not available the instrument may be energised from a small battery and sealed-in type of vibrator, eliminating the cranked generator and slipping coupling. This feature is of great value to electrical contractors as all that is necessary is to close the switch for the test KUH voltage to be available. V2 ^w w w - T Special safety prods or crocodile clips can R 2 be supplied as may be required. It is some times preferable to incorporate a switch in the test lead circuit to ensure that the prods are Fig. I.—Diagram illustrating operating principle not alive before application of the equipment to be tested. This switch may be incorporated mains energised, AC 200-250 V, and it has three in the instrument or in the prod leads them ranges extending from 0-3 to 50,000 megohms, selves. which may be increased if desired. The meter is provided with a moving-coil The principle of operation is impression of 270 deg. scale instrument which increases the DC on the unknown and standard resistances accuracy of reading. Alternatively a modern in series. The voltage drop across the standard is a function of the current through the unknown resistance, the voltage drop being measured by a valve voltmeter. Provided the input impedance of the meter is high compared with the standard resistance, then, as Fig. 1 indicates, Rx = / v \ R, Thea voltmeter - o- consists of a remote cut-off pentode to give a suitable scale law and a negative feed back circuit to ensure reasonable freedom from supply voltage variations and changed valve parameters. The plate circuit is operated on AC with resultant economy in cost, space and weight due to the omission of rectifying and smoothing circuits. A second valve provides a test voltage of 500 V DC which is smoothed. If specified, different test voltages can be provided, in which case a selector switch permitting immediate availability of a number of different test voltages would be incorporated. The live terminal is negative with respect to Fig. 2.—Second prototype electronic ohm m eter the earth terminal and the circuit is arranged so that on short circuit a large negative bias is square case precision meter with 120 deg. scale applied to the amplifying valve. Moreover, can be provided. This type of instrument adds the resistances incorporated in the test circuit to the general appearance and the choice is limit the current to a safe value on short circuit. a matter of the customer’s preference. The No damage can therefore be caused by in total power consumption is 10 W and a pilot advertent operation. lamp is fitted to indicate when the meter is The calibration of the instrument may be energised. 164 E l e c t r i c a l R e v ie w August 3 , 1 9 4 5 M B O O K S Radio Test Instruments. Protective Gear Systems.
Radio Service Test Gear. By W. H. Cazaly. tion that his radio education has thereby been Pp. 89; figs. 46. Sir Isaac Pitman & Sons, noticeably improved. Apart from this difference Ltd., Parker Street, Kingsway, London, of opinion, it is felt that the book does contain W.C.2. Price 6s. much useful information which would otherwise This book is almost completely based on be difficult to acquire.—W. E. M. articles by the author which have appeared in the Wireless World. In general it may be said The Protective Gear Handbook. By M. Kauf- that its contents cover a rather wider field than mann. (298 pp.; 184 figs.) Sir Isaac the title would indicate. “ Radio service ” is Pitman & Sons, Ltd. Price 30s. generally taken to mean the repair of radio This book forms a companion volume to equipment which presumably operated satis “ The Switchgear Handbook,” but the author factorily in the first place; the design of radio remarks in his preface that it is also intended to receivers is quite a different proposition, and serve as a general textbook which will be of while certain instruments are common to the assistance to students as well as to engineers repairer and the designer, the latter makes use responsible for the design or maintenance of of many additional pieces of gear. protective gear systems. The book opens with Mr. Cazaly has included information on a an introductory chapter giving definitions of number of instruments not commonly found in protective gear terms, and dealing with system the repair shop at the present time. It may be earthing and current transformer characteristics. that such instruments ought to have a place The following five chapters describe fully most there, and in any case, their inclusion adds to of the well-known methods of protecting feeders, the value of the book. It is surprising, however, busbars, transformers, and generators. The to find no reference to that more versatile tool final chapter is on testing and maintenance. of the designer and repairer alike, the cathode- The author, a protective gear engineer with ray oscillograph. The omission may have been Metropolitan-Vickers, has had extensive first deliberate, but in view of the increasing popu hand experience of protective gear work, and larity of this instrument, one would have the book is full of valuable practical data expected a chapter to be devoted to it. which will be of assistance to the protective gear After an opening chapter on the assessing of engineer in choosing a new system, or in operat receiver performance, the author deals with ing an existing system to its best advantage. standard signal generators and test oscillators. The book is clearly written and fully illustrated, Output meters and attenuators are described in and little knowledge is assumed on the part of the next chapter, which is followed by one on the reader. valve voltmeters. Audio-frequency testers and It should be mentioned, however, that the bridges for inductance and capacitance are book is concerned almost exclusively with next dealt with, with a separate chapter on Metropolitan-Vickers systems and apparatus. radio-frequency measurement of the same There is little specific information, for example, properties, together with electrolytic condenser on distance systems of the reactance type, or on testing. Beat frequency AF oscillators have a neutral displacement protection, and certain chapter to themselves. Valve testers are described systems developed within the last few years are in some detail, and both the elementary total not included. Carrier current protection is not emission type and the more commonly used treated as fully as its importance warrants. mutual conductance variety are covered. The No mention is made of the great utility of final chapter deals with the multivibrator type automatic fault recording instruments in of generator. diagnosing the cause of protective gear mal- Throughout the book reference to proprietary operation; such instruments give a record of equipment has been excluded; circuit diagrams the current and voltage conditions on the are provided, but no constructional details, or, system during a fault, and thus enable these in most cases, component values, are given. conditions to be reproduced subsequently when The author, in a preface, hopes that readers will the relays are tested. attempt the construction of instruments, and A bibliography would have been useful to rather provokingly states “ Design data for all readers wishing to study further certain parts the instruments mentioned are to be found in a of the subject; in particular, references might large number of technical books and periodicals have been given to a number of useful papers if people take the trouble to search for them in the I.E.E. Journal. Although the book has selves—which is far better for their own radio just been published, the preface is dated October education than being told exactly where to 31st, 1943, so that it appears to have been look.” As one who has wasted much time in written some time ago. This may account for searches, often unsuccessful, of this -very type, some of the omissions which it is hoped will the reviewer cannot endorse the author’s sugges be remedied in a second edition.—J.S.F. August 3, 1945 E l e c t r i c a l R e v ie w 1 6 5 Production Plant Maintenance Attracting the Right Kind of Men
T a meeting I attended some B y H. Greaves, ludicrously classed as “ non productive,” a sort of necessary Al time ago the maintenance A.M.I.I.A. department came under dis evil. So long as employers think cussion and the expression “ non-productive ” in these terms, the status of the maintenance was applied to the department as a whole, electrician will not be improved. His rating not in any derogatory sense, but as a simple is usually the lowest of all engaged on this statement of fact. class of work, and payment for his skill When it is considered that a man, or seems to be in inverse proportion to his value woman, can be taken from an. unskilled to production. Is the real reason for the low occupation and within a very short time gain estimation of the value of electrical main proficiency in the control of a semi- or fully- tenance that the decline of the apprenticeship automatic machine, thus becoming “ produc system has focused attention to such a tive,” the position is rather bewildering. degree on planning and methods of produc This machine may be a highly complicated tion that individual skill is considered of appliance from an electrical .point of view minor importance ? and has probably cost several thousand pounds. For example, it may incorporate a Maximum Machine-Hours time-delay device comprising a transformer, In computing non-productive costs the valve, potentiometer, resistor and capacitor. expression “ machine-hours ” is taken into Thus any man who is called upon to maintain account, as this is of necessity of more the machine must have a knowledge of the importance than man-hours, especially when theory of its operation and be something more we consider the initial cost of the machine than a “ fool with a pair of pliers in his and amount of time in which it may stand pocket.” idle—often as much as half the working day. This simple instance is cited to show how If we are to recover our position in world the duties of the maintenance electrician trade machines must be in operation for the have changed since the days of single motor maximum time each day, calling for efficient drive with line shafting and lines of belt- planning and just as efficient maintenance, driven machines. Furthermore, without the in order to minimise the price of the finished aid of these electrical devices, the volume of product. production we see to-day could not have Another point which requires considera been reached, a fact which is proved by the tion is supervision. The modern production small amount of “ fitting ” required in foreman is of the “ functional ” type ; he need modern factories, both removal of metal and not have had an engineering training so long correct surface finish having been satisfac as he can get the work done and possesses torily carried out by the machine. In the the ability to secure discipline with firmness future scientific mechanisation will play a and tact. Such qualifications are not enough great part in reducing man-hours required, in a maintenance foreman, who must also and the value of efficient maintenance will possess the skill necessary to locate the most be even more important. elusive fault and in addition possess organis ing ability to a high degree; he does not Skill and Status require anyone to plan his work, but must When a machine is installed, the represen exercise eternal vigilance in order to avoid tative of the firm supplying it (especially if it major breakdowns. comes from the United States), being little The decline of the craftsman has produced more than a demonstrator, often has to the machine minder with little or no mechani enlist the advice and services of the main cal knowledge who is able to augment his or tenance department in order to get the her wages by bonus payable for a better than machine into production. Although elec average performance. It is difficult to adapt trical maintenance engineers, by tracing and such methods to the plant maintenance staff, rectifying the most stubborn and mystifying and attempts to reward individuals cause faults, have made a valuable contribution dissatisfaction and the quality of work to production during the war, they are suffers. The remedy is to set a standard for August 3 , 1 9 4 5 1 6 6 E l e c t r i c a l R e v ie w maintenance men and to engage only men improvement, when the present shortage of who can achieve this standard, paying them skilled men is past. The method of engage at a sufficiently high rate to attract the right ment should not present much difficulty, for kind. The result would be a definite im it is not so much skill in the manipulation of provement in the quality of work carried out, tools that is needed but rather a sound know for one of the reasons for the low rate of pay ledge of principles of operation of electrical considered appropriate for this work is machines. Such knowledge can be gained by probably the low grade of man who is attendance at a technical college, by corres allowed to enter this class. pondence course or by reading books on the Engineers responsible for the engagement subject, and the cost of acquiring it is within of labour can do much to bring about an reach of anyone. Electricity in Eire Increased Revenue from Lower Sales LTHOUGH the sales of electricity by decrease), 32 million kWh for general lighting A the Eire Electricity Supply Board fell (7-6 per cent, decrease), 36 million for general in the year ended March 31st last from heating, cooking and water heating (7-4 per 346,938,333 kWh to 319,010,297 kWh, the cent, decrease), 128 million kWh for motive gross revenue was £44,098 higher at £2,477,901 power (5-6 per cent, decrease), 8 million kWh due to alteration in prices at the close of 1943. for public lighting (6-4 per cent, increase), Working expenditure, however, also showed an 4 million kWh for traction (37-5 per cent, increase from £1,705,078 to £1,850,459, as did decrease) and 4 million kWh for miscellaneous interest, repayment of advances and discharge purposes (6-0 per cent, decrease). of capital liabilities acquired with local Contracts were placed for a 12,500-kW authorities (from £924,847 to £951,795), so turbo-alternator set and two boilers of 125,000 that there was an adverse balance of £324,353 lb. per hr. for the Portarlington peat fuel (against £196,120), raising the accumulated station. An investigation into the possibility deficit to £539,539. A sum of £315,000 for of providing additional steam generating depreciation charged to revenue account brings stations using peat as fuel was carried out and the total made available towards wasting a suitable site for a second station was tentatively capital assets to £4,683,630. Capital invested decided upon. To improve the boiler capacity in additional plant placed in commission in the Pigeon House (Dublin) station a contract during the year, including a portion of the was entered into for the installation of two Liffey works, was £980,616, as compared with boiler units, each of 100,000 lb. per hr. The £470,888 in the preceding year, the aggregate first of the two main generating sets in the total expenditure at March 31st was £18,108,332. Pollaphouca station on the Liffey was placed The limited quantity and poor quality of in temporary commission in December, 1944, available coal, combined with the effects of an and produced 15 million kWh. The erection unusually dry spring and summer during the of the second set proceeded as the deliveries first six months of the year necessitated severe of materials allowed. Both the Pollaphouca rationing of all classes of consumers throughout and Golden Falls stations are working with the summer, but later in the year the situation improvised switch and control gear pending was eased through heavy rainfall. Of the delivery of the complete equipment. reduced output of 406 million kWh (compared Schemes for the hydro-electric development with 443 million kWh) the hydro-electric of the Lower River Erne and the Lower River stations generated 282 million kWh. In view Liffey have been prepared for submission to the of the amount of the deficiency for the year Minister for Industry and Commerce. ended March 31st, 1944, and the indication As a result of the limitation on sales of from estimates that, with increased expenditure appliances the turnover shown in the Mer on coal and maintenance, the deficiency in the chandise Trading Account decreased from year under review would be substantially £37,643 to £24,778 with a gross profit on sales higher, it was decided to press again the applica of 23 -6 per cent. The account incurred a loss tion for sanction to increase prices, but this of £250, having been charged with overhead had not been received at the close of the year. expenses and interest on working capital. At March 31st the number of consumers On the Installations Trading Account the was 228,008, which was 5,995 more than a year credit taken for contracts completed and before. Generation costs per kWh rose from invoiced work carried out by the Department 1-3Id. to l-45d., the price per kWh sold being was £62,897 (against £74,561). The rate of l-85d. (l-68d.). Of the 319 million kWh sold gross profit was 28-4 per cent, and after the (8 per cent, decrease), 116 million kWh was debiting of overhead expenses and interest used for domestic purposes (10-2 per cent. on capital there was a net profit of £4,457. August 3, 1945 E l e c t r ic a l R e v ie w 167 Transformers in Parallel Graphical Construction for Division of Load
TRANSFORMER can B y J. E. M acfarlane, side and the short-circuit A be represented by a B.Sc,(Eng.), M.I.E.E., A.M.I.Mech.E. current of transformer B at resistance and reactance in the same test voltage as A. series, if the parallel portion of the equivalent Transformer A, power-factor = - —- —, = circuit which allows for the no-load current 100 x 16 is neglected. If another transformer of O' 4. Transformer B, power-factor = — — similar voltage ratio is connected in parallel 80 x 16 to the primary and secondary busbars, = 0-8. Short-circuit current of B with the voltages are common and the load current will divide between the two trans same test voltage as A = ^ x 16 = 20 A. formers inversely as their impedances. With oU T ( |, , , 100 X 1000 . any given load and power-factor the mag Total load current = ^ x Q,g = 4F7 A. nitude and direction of the vector representing the total current is fixed and to some other In constructing Fig. 1 draw a horizontal scale represents the total kVA, as the voltage scale OP for power-factor and with O as is common. The division of load may be centre describe the power-factor quadrant calculated from the equivalent resistance and PQ. To a convenient scale lay off OA equal reactance of the transformer to either the to 16 A, at a power-factor of 0-4, and to primary or secondary side or similar results the same scale lay off OB equal to 20 A, at a obtained from suitable test figures. power-factor of 0-8. Draw OC the resultant of OA and OB and measure its length to the Method of Procedure short-circuit current scale, which is 34-8 A. A graphical method is often preferred where To some other scale OC represents the total mathematical experience is not sufficiently load current, but the phase angle POC is not developed. Such a method, which requires 0-8 power-factor as required. If OC is the use of only a pair of compasses and swung round to OCx which is 0-8 power- suitable scales, is illus factor, the relative trated in the following positions of the two examples. cortiponent currents Example 1. Two will be unchanged. To 60-kVA 3,000/230-V fix their positions, single - phase trans take the arc DB and formers have to m ark it off on the operate in parallel and power-factor quadrant share a load of 100-kW at the intersections of at 0-8 power - factor OA and OB produced, lagging. A short- that is at OAj pro circuit test was taken duced and OBx. The on each transformer vertical ordinates from with the same current these points of inter in the primary wind section give the respec ings. tive power-factors of The figures then Transformers A and B. obtained, with the But O Cx equals 41- 7 A, secondaries short-cir to the load current cuited, were: Trans scale, hence to the form er A, 100 V, 16 A, same scale OAx = 640 W ; transformer B, 80 V, 16 A, 1,020 W. d- X 41-7 = 19-2 A at 0-6 power-factor Obtain the respective primary currents and 3 4 - o power-factors, neglecting the efiect of the and OBx= ^ V x 41-7 = 24 A at 0-915 no-load currents. The method is to calculate 34-8 the short-circuit power-factor of each trans power-factor. former, the total current on the primary If the resistance and reactance of each August 3 , 1 945 168 E l e c t r ic a l R e v ie w transformer is known, either in ohms or as OC being swung round to OCx at 0-9 power- a percentage value, a similar construction is factor lagging. Similarly OA moves to OAx used but with an admittance instead of a and OB to OBj, the respective projections current scale. With transformers of different on to the power-factor quadrant indicate ratings these values are adjusted to a common the power-factors, whilst the lengths relative base as shown in the following example. Example 2. Two transformers of the same voltage ratio share a load of 900 kW at 0-9 power-factor lagging. Transformer A is 800 kVA and has 2 per cent, resistance and 5 per cent, reactance drop on full-load whilst transformer B is 400 kVA and has 3 per cent, resistance and 4 per cent, reactance drop on full-load. Determine the kVA and. power-factor of each transformer, having the following characteristics:—Transformer A : 800 kV A ; impedance (ZA) = s/2 2 + 52 = 5-385 per cent.; admittance = - j - = 0 1 8 6 ; ¿-'A 2 short-circuit power-factor = jTjgj = 0-371. Fig. 2 Transformer B: 400 kVA to 800 kVA base; R = 6 per cent.; X = 8 per cent.; impedance to OC, give the kVA. The results are:— (ZB) = y 'b 1 4- 82 = 10 per cent.; admittance Transformer A 658 kVA at 0- 855 power- factor; Transformer B 354 kVA at 0-96 = = 0-1 ; short-circuit power-factor = Zb power-factor. This diagram can be used for any = 0- 6. Total load ^ 1,000 kVA. A. = = total load at any power-factor after the In Fig. 2, OA is 0-186 and OB is 0 1 , to characteristic quadrilateral OECB (Fig. 1) the short-circuit admittance scale, which has been constructed, though the p.f. gives a resultant admittance of OC which quadrant may have to be extended above scales 0-2825. The construction is as before, the horizontal OP for leading power-factors.
Australian Notes From Our Australian Correspondent HE new power station to be erected at action, and £7,000,000 will be spent for the T South Fremantle will generate at a fre development of the new open cut at the Ayllour quency of 50 cycles in conformity with the briquetting factory and other works for the standard adopted by all other Australian stations State Electricity Commission. The twenty-fifth with the exception of the East Perth station, annual report of the Commission shows a total where the frequency is 40 cycles. The Western revenue for the year 1943-44 of £5,628,780, an Australian State Government has now decided increase of £138,692 on the previous year. Ex to convert the East Perth station to 50 cycles, and penditure was £5,503,908, showing an accumu has secured from the Commonwealth Govern lated profit of £129,727. Tramway losses were: ment a grant on a £1 for £1 basis up to a total Ballarat, £2,762 ; Bendigo, £17,350 ; and of £300,000. The Perth Chamber of Commerce, Geelong, £4,158. however, has greeted the news with mixed A conference of Hunter Valley councils and feelings, and is asking the Premier (Mr. Will- industrial organisations recently supported the cock) whether the State will bear the cost of-con- nationalisation of the coal industry, the co version of all the electric motors used throughout ordination of the electricity supply, and the co Western Australia for industry and com operation of local government bodies to provide m erce. cheap power throughout the district. The Mr. Willcock says that the estimated savings to conference also recommended the establishment the community over the next twenty "years will of a factory at Cessnock for producing electrical be (at present value): system losses, £93,000; appliances. transformer costs, £39,000'; future motor costs, The Merredin (W.A.) Road Board has £154,000 ; total, £286,000. decided to proceed immediately with the con A plan to make Victoria entirely self-support version of its present 220-V DC supply to ing for power and fuel supplies is being put into 50-cycle three-phase. August 3, 1945 E l e c t r ic a l R e v ie w 169 COMMERCE and INDUSTRY Electricity for Farms. Undertakings’ Building Work.
Newcastle Farm Week tative selection of domestic apparatus included Jackson and G.E.C. cookers, “ Sadia ” water VERY good opportunity for demonstrating heaters, refrigerators, small appliances, and A rural uses of electricity will be provided “ Osram ” and “ Mazda ” discharge lighting during the special “ Farm Week ” which is to apparatus. A joint display by the War Agri be held on the Town Moor, Newcastle-upon- cultural Committee and Seale-Hayne College Tyne, from August 25th to September 1st. dealt with soil and livestock improvement, An area of 25 acres is being laid out to represent, cereal varieties, plant disease and pest control, as nearly as possible under present restricted improvement of grassland and modern milk conditions, a working farm with steading production. Sound films on topical and modern including byres, barns, etc., a grazing area, and an actual cultivation area. In addition one part is devoted to machinery displays, and others to rural crafts, education, etc., the underlying idea being to show townspeople the life and habits of the country. The North-Eastern Electric Supply Co., Ltd., is taking a great interest in the exhibition, and it has undertaken Part of the dom estic appliance section at the Bovey Tracey exhibition to provide, free of charge, a substation and low-voltage network farming subjects were shown each evening. to supply all the machinery and any lighting Demonstrations were given of machinery and and is also not charging for electricity used. appliances of farming interest, notably an It is assisting in the layout of all machinery, Essex mill, Godwin and Beresford pumping and is lending any which is not being shown as sets, Gascoigne milking and G.E.C. sterilising an exhibit. The farm steading will be virtually equipment, Frigidaire commercial refrigerators, all-electric, the only exception being that there “ Sadia ” and other water heating appliances will be a traction engine, a tractor, and an for dairies, portable motors, Wolseley shearers electric motor to drive the thresher, so that the and clippers, portable tools, farm wiring old and new methods can be compared. The systems, etc. E.D.A. kitchen models were also dairy will, of course, be all-electric. Un displayed and cooking demonstrations were fortunately, it has not been possible to erect a given three times daily. farmhouse or farm cottage, but to get round the difficulty of showing domestic apparatus Engineering Training which would be suitable in such buildings, the company is erecting a marquee and putting into This is the title of a well-illustrated brochure it one of the new E.D.A. post-war kitchens, produced by Babcock & Wilcox, Ltd., for the as well as other domestic electrical appliances. guidance of young men embarking upon an engineering career. In an introduction the Hexton Electrical Exhibition chairman of the company, Lt.-Col. Sir John Greenly, says that the main object of the A recent electrical exhibition arranged by training schemes outlined is the best possible the Northmet Power Co. at the Village Hall, and most efficient training for the graduate Hexton, included a display of.electrical apparatus engineer and the student apprentice who may for use on the farm and in the home. The farm enter the company’s service. The opportunities apparatus included an electric welder, milking which that service gives for acquiring a thorough machine, farm steriliser, churn stool, washing and up-to-date knowledge in combustion and tank, a model of the well-known Essex mill, steam generation are stressed in the opening a model grain dryer and conveyor, a plant notes which show the wide range of the com irradiator, soil heating cable, greenhouse pany’s activities. heating, etc. Cookers, washing machines, An outline of the desirable preliminary wash boilers, water heaters, kettles and irons training for candidates is then given and after were among the domestic appliances on view. some pages dealing with the company’s works there follows a description of the training Bovey Tracey Farm Display courses which are for graduate engineers and Every farmer and landowner in the 100 sq. student apprentices. Graduate engineers under mile area served by the Teignmouth Electric go a probationary period of eight months at Lighting Co., Ltd., and the Dawlish Electric the end of which they proceed on a 28-month Light & Power Co., Ltd., was invited to an course on the production, engineering or sales exhibition organised jointly by the two com sides of the business. Then if they are selected panies at Bovey Tracey recently. A represen for positions with the company they have August 3 , 1 9 4 5 1 7 0 E l e c t r ic a l R e v ie w
a finishing course of one year abroad. Student electrical equipment such as cookers and heaters apprentices serve a probationary period of nine and radio sets. Mr. Bridgen considered that months, followed by a 39-month training on unless many of the restrictions were removed the engineering side and (if selected for employ New Zealand would suffer. ment by the company) a year abroad. In his reference to Australia Mr. Bridgen said During training students are expected to carry that the Commonwealth had almost everything their studies to Higher National Certificate it needed, except rubber and cotton. Nothing standard or to attain a full university degree. was left available for import except textiles, Generous remuneration is provided for their special apparatus and heavy machinery. subsistence. Copies of the brochure are obtainable from Babcock House, Farringdon Street, E.C.4. Supply Undertakings’ Building Work Under the Control of Building Operations Transporting a Wireless Station (No. 5) Order, 1945 (S.R. & O. 1945 No. 802; Stationery Office, price Id.) a limitation is A complete wireless station, weighing 700 tons imposed'upon the carrying out of building work and requiring five special trains comprising costing more than £10 except under authorisa 183 wagons has been moved by the L.M.S. inter alia, Railway from Cleckheaton to Immingham en tion. The new Order is applicable, to building and civil engineering works under route to In d ia . taken by statutory undertakers, but does not affect the present position with regard to the Back to Normal repair and maintenance of existing building The accompanying picture sent to us by Mr- and civil engineering works. H. Pryce-Jones, engineer and manager of the In the application of the Order to the execution Brighton Electricity Department, shows one of of works by electricity undertakers, the Elec the advertisements that his undertaking is now tricity Commissioners, as the authorising authority, have authorised all !■SF'Z'' undertakers to carry out the construction, reconstruction or alteration of building and civil engineering works essential for the purposes of their undertakings and costing more than £10 but not exceeding £500 on the conditions that the undertaking furnishes to the Commissioners, not later than ten days after the expiration of each month, a return giving particulars of each job carried out under this authorisation during the preceding month; and that the Commissioners reserve the right to review or withdraw this authorisation at any time. Prior individual application will still be necessary for authorisation to execute building and civil engineer ing work in excess of £500. Trading Estates Electricity advertised again on a Brighton trolley-bus In addition to sponsoring the building of new factories, and the displaying on buses and trolley-buses. It is disposal of surplus Government factories, interesting as indicating the return to normal in accordance with the Government’s trading activities after a long period of general distribution of industry policy, the' repression. Board of Trade is to continue the trading and industrial estates in Development Areas and Trade with New Zealand establish new ones. These will normally be At a meeting of the M anchester Branch of the operated through trading estate companies Institute of Export last week, Mr. C. W. financed by the Government. The new estates Bridgerr (Ferranti, Ltd.) expressed what the will be at South Shields, Hartlepool, Swansea, Manchester Guardian calls “ an interesting but Newhouse (Lanarkshire), Greenock and Port hardly encouraging view ” of the Australian and t j j — Dundee, ar,d Salterbeck, Workington. New Zealand import markets. He said that the *n addition the Royal Ordnance Factories at Act of Import Selection passed by the New Aychffe, Spennymoor, Hirwaun and Bridgend are to be taken over and operated as trading Zealand Government to foster the Dominion’s estates. secondary industries prevented the import of articles of a class manufactured in New Zealand and this often meant that the New Steel Company Fined Zealander had to be content with inferior pro ducts. There was practically nothing on the free r i one®elu H].^istrates *ast week im posed a fine of list for household or personal use. There was n n r a t i a n t fco s t s ’ on the English Steel Cor- an absolute prohibition on the import of small heaH not having an electric over- insnectnr if f8 ?fa-ne pr0Perl5 maintained. An apparatus used in house, office or factory and P f factories stated that after delivering August 3, 1945 E lectrical Review 171
a tool in the stamp shop the crane was started was found lying dead in the kitchen of her home, and the pulley block fell off, striking a man and having apparently received an electric shock causing him fatal injury. It was found that part from the wiring of an electric clock. of the guard of the pulley block to keep the rope At the inquest Mr. W. Westall, installation in position was missing. If the guard had been inspector for the Corporation Electricity in position the block could not have fallen off. Department, said that the wiring had been For the defence it was contended that there was jointed in an unskilled manner. There was an nothing in the Factory Acts to compel the attempt to insulate it by a rubber band, which maintenance of guards on the pulley blocks, had slipped out of position. but because it was the custom the company 11 had them. The crane was inspected at intervals. A.T.S, at Birmingham Exhibition Purchase Tax on Electrical Apparatus A week or two ago an exhibition of domestic electrical appliances was specially arranged for The London and Home Counties Joint the benefit of members of the A.T.S. at the Electricity Authority is suggesting to electricity Paradise Street showrooms of the Birmingham ii fk
&
An A.T.S. party at the Birmingham showrooms
undertakings in its district that they should Electric Supply Department. On the first day make representations direct to the Board of a party of officers and other ranks from a Mid Trade and through their Parliamentary represen land Army Educational Centre paid a visit and tatives, regarding the imposition of purchase were encouraged to ask questions about the tax on domestic electrical apparatus, insisting operation and cost of appliances. The next day that the subject should receive further con the show was inspected by a party from an Army sideration bv the Treasury. Domestic Science School near Birmingham. n Queen Mary College Trade Publications Metropolitan-Vlckers Electrical Co., Ltd., 1, Queen Mary College (University of London) Kingsway, London, W.C.2.—Abridged list ■'i- has moved to Mile End Road, London, E.l announcing price reductions of certain )* (telephone: Advance 4211-4). “ Cosmos ” general service lamps. p North Western Fuel Luncheon Club Acru Electric Tool Manufacturing Co., Ltd., 123, Hyde Road, Ardwick, Manchester, 12.— The North Western Fuel Luncheon Club Illustrated leaflet describing vest-pocket neon has been formed to function on generally testers, two-pole model and single-pole with similar lines to the London Fuel Luncheon screwdriver attachment. Club. Details are available from the hon. Frank Whitelegg, 90, Robin Hood Lane, ¿2 organising secretary, Mr. R. Baker, Selas Sutton, Surrey.—Leaflet (list GNA) illustrating iflri Works, City Road, Manchester. The first eight types of coil and wire winding machines. ae luncheon meeting is provisionally fixed for cj,i O ctober. Ransomes & Rapier, Ltd., Waterside Works, ii*s Ipswich.—Publication No. 453 illustrating and at Fatal Accidents to Children giving brief particulars of the Rapier “ 14R” tuBy 5 concrete paver. g An inquest was held last week at Oxford into Applicants for copies of these publications ■ ¡g the death of a 21-month old child, Angela should write on business letter-headings. P Luckett, who was found in a garden clutching a , EIÆ CTRIOTT 81PPL Ï Bournemouth Purchase Move. Luton Rural Plan. B edford.— E l e c t r i c i t y P r o s p e c t s .— In th e Falmouth.— P u b l ic L i g h t i n g .—A p r o p o s a l report and summary of accounts of the Elec by the Town Council to light the s tr e e t s by tricity Department i.engineer. Mr. P. G. Camp electricity is to remain in abeyance. f o r six ling) for the four years 1941-44. it is stated that months and for the present 100 existing la m p s all'the resources' of the undertaking will be are to be prepared for gas lighting a s fr o m needed to meet the demands of the iuture. September 1st. This decision was reached a t The Rural Demonstration Scheme which has the last meeting of the Council when a letter been wound up shows a total accumulated was read from the manager of the gas c o m p a n y ’ deficit for the eleven years' working of £29.009 saving he thought it grossly unfair that the and the sum of £5,000 has been paid by the Council should contemplate using electricity Corporation to the Development Commissioners without giving the gas company an opportunity’ in full satisfaction of the outstanding amount to q u o te . of loan. On the subject of charges it is pointed Grimsby. — H i g h e r C h a r g e s 7 — Since out that while the average price obtained for the beginning of the war the electricity’ uader- lighting, heating and domestic two-part tariff taking has had to pay £100.000 more to meet supplies fell from l-33Sd. to 1 -292d. 'in the increases in the cost of coal. .Alderman A\. H. four years, the figure for power rose from Thicken, chairman of the Electricity Com 0-736d. to 0-955d. in consequence of the coal mittee. stated at a meeting of the Town Council clause. It is considered that some adjustment that this would probably necessitate an increase wfll have to be made to rectify' this anomaly. in the price of electricity. The annual report Birkenhead. — G e n e r a t i n g S t a t io n E x t e n shows that sales of electricity at 63.762.569 kWh s i o n .—The Electricity Committee reports that are over 7 million kWh higher than in any Merz & MeLellan. the consultants, have previous year. The gross revenue rose from submitted plans and estimates for the extension £258.112 to £292.080. the surplus balance of the power station by the installation of a being £5,351 (£1,772). further 50,000-kW set in the second section, the estimated cost being £1,851,000. High Wycombe. —- A l t e r n a t i v e S u p p l y S c h e m e .—The Wessex Electricity’ Co. is to Bournemouth. — P r o p o s e d A c q u i s i t i o n o f construct an additional main transmission line U n d e r t a k i n g .—At a recent meeting of the from Reading and Marlow to operate with the Borough Council an interim report upon the existing line as a ring. The company is also purchase of the undertaking of the Bournemouth to construct on behalf of the Town Council a & Poole Electricity Supply Co. in the town was new line from Marlow to the Wycombe boundary considered and a resolution was adopted in at Cressex and to sell to the Council the existing favour of the acquisition, it being pointed out lines, at an estimated price of £18,124. Applica that the next opportunity for purchase would tion is to be made for sanction to borrow not arise until 1953. Similar resolutions have £200.000 to cover the cost and possible con been passed by the Poole and Christchurch tingencies. Town Councils in whose areas the company also o p e ra te s. Jerse y . — R e d u c e d C h a r g e s . — The Jersey B rad fo rd .—H ydroelectric S t a t i o n P r o Electricity Co., Ltd.. announces that after the p o s e d .—A t a meeting of the Corporation September quarter its charges will be reduced Reconstruction Committee the chairman stated from lOld. to 7d. per kWh for lighting and from that he was in consultation with the electrical 'Id. to 4d. per kWh for heating, cooking engineer regarding a suggestion to construct a and power. The “ unit ” charge for two-pan hydro-electric station at Apperley Bridge. tariffs is also reduced from 6id. to 3d. No charge will in future be made for meters. Brighton.—H.v. S y s t e m E x t e n s i o n s .— T h e Corporation Public Utilities Committee is to H ull.— N e t P r o f it .—The annual report of extend the 33-kV system from the power station the Electricity Department submitted by the to a substation to be erected at Withdean at a general manager )Mr. D. Bellamy) to the Elec cost of £72,814. tricity Committee shows a net profit of £27,997. C ardiff.—P o w e r S t a t i o n E x t e n s i o n . — A deputation has been appointed by the Cor L eeds.— D e a r e r P o w e r S u p p l i e s .— C h arg es lor electricity for power purposes have been poration Electricity Committee to discuss with increased by 5 per cent. Domestic consumers the Central Electricity Board the question of are not affected. the future extension of Roath power station. H ir e a n d H ir e -P u r c h a s e .— The Committee Luton. — R u r a l S u p p l i e s . — M r. H . W . is seeking authority to utilise £10,000 of surplus Grimmitt. of the Electricity Commission, w a s revenue for supplying electric cookers and water among the speakers at a recent conference o n heaters on hire and hire-purchase. rural electrification held at Dunstable T o w n T h e P e n a r t h U n d e r t a k i n g .—The Parlia Hail. Councillor A. W. Gregory presided a n d mentary Committee has been asked to include the delegates, numbering about' 100, included in the new Parliamentary Bill provisions representatives of the. rural district and p a r ish empowering the Corporation to acquire the councils within the area of supply of th e electricity undertaking of the Penarth U.D.C. Luton Electricity Department and m a n y S t r e e t L i g h t i n g C o n v e r s i o n .— T h e C o r members ot the National Fanners’ U n io n . poration Works Committee is seeking sanction Mr. Gnmnutt said that before, the w a r th e r e to borrow £40,000 for the conversion of street was considerable hesitation among farmers in gas lamps to electricity. taking a supply ot electricity : now, however. August 3, 1945 E lectrical Review 173 the demand was universal. He understood it was time a few days ago. A contract for gas lighting the object of the Luton undertaking to bring expired early in the war. country prices as near as possible to those in the Southwark.— D e f i c it o n U n d e r t a k i n g .— T h e towns. The farmers in the area were fortunate Borough Council Electricity Committee reports in obtaining electricity at a price th'at was less a net deficit of £7,948 for the past year. than in most other areas in the country. In fact, in the undertaking as a whole the price Tynemouth. — T r a n s f e r o f P a r t o f U n d e r was two-thirds of the national average. t a k i n g .—The Corporation Electricity Com Mr. C. T. Melling, borough electrical mittee is to discuss with the North-Eastern engineer, outlined the plans of the undertaking. Electric Supply Co., Ltd., the question of the He said that a supply was already available to proposed purchase of that part of the company’s all villages and hamlets with a normal popula undertaking within the borough at New York. tion of more than about 50, which was much L i g h t i n g C o n t r o l .—The Corporation Elec in advance of the recommendations of the tricity Committee recommends a scheme Scott Report, and in the ten-year programme it estimated to cost £7,574, for the installation would be possible, with few exceptions to supply of an electric lighting control system of the every hamlet of more than 25 inhabitants. type manufactured by Standard Telephones & Nearly 200 of the 500 farms in the area already Cables, Ltd. used electricity. Nottingham. — Y e a r ’s P r o f i t . — T h e TRANSPORT accounts of the electricity undertaking for the Edinburgh.— R e c o r d T r a f f i c .—Tram and bus past year show a net profit of £11,312 against passengers for the year ending May 31st £12,211 for 1943-44. The total quantity of numbered 252,168,468, an increase of 7,385,543 electricity sold was 2 per cent, higher at 217-3 as compared with the previous year. The million kWh. combined revenue from the trams and buses D o m e s t ic I nstallations .—The Electricity was £1,635,025, an increase of £54,214. Committee is considering the wiring of houses H yde. — A b a n d o n m e n t o f T r a m s . — T h e for power points on the same lines as the assisted Stalybridge, Hyde, Mossley and Dukinfield wiring scheme. The electrical engineer is to Transport and Electricity Board is to abandon report on the provision of all kinds of electrical tramways in Hyde from Lewis Street to Market appliances for use in working-class homes as a S treet. post-war reconstruction scheme. South Shields.— T r o l l e y - b u s E x t e n s i o n s .— Oldham. — - C o o k e r s o n H ir e -P u r c h a s e . — An unsuccessful move to refer back the plan Mr. E. Binns, borough electrical engineer, for spending a further £13,000 on trolley-bus stated at a' recent meeting of the Electricity extensions was made at a recent meeting of Committee that he hoped that it would be Town Council. Councillor Hardesty asserted possible to renew hire-purchase of cookers as that within ten years trolley-buses would be soon as supplies became available. obsolete, and he also complained that the Romsey.—E l e c t r ic S t r e e t L i g h t i n g . — T h e streets were not suitable for them ; he advocated streets were lighted by electricity for the first the use of motor buses. Simplified Light Metals Control SIMPLIFIED procedure for the control of monthly licences for acquisition and use of raw A raw and fabricated light metals was intro material. Users and producers of fabricated duced as from August 1st. The general intention magnesium will have the same freedom of is to permit a return to free competition and the action as for fabricated aluminium. normal commercial relationship between con The Control of Silicon (No. 1) Order, 1940, is sumer and producer, except in special cases. to be revoked, whereupon it will cease to be The Control of Aluminium (Nos. 5-6) Orders, necessary to apply for licences to acquire and 1940-45, and the Light Metals and Alloys, use metallic silicon. The M.A.P. will continue Fabrication (No. 1) Order, will remain in force to trade as at present, and any person wishing but under the new procedure running licences to acquire silicon will simply send his order to will be granted so that users of raw material the Light Metals Control. will be free to purchase and use it in any desired The Headquarters of the Light Metals Control amounts, for any purpose, and from any domes will continue to be at Banbury. The four tic supplier (except for virgin aluminium, where Fabrication Controls (Sheet & Strip, Extrusions, the Ministry of Aircraft Production will continue Castings, and Forging & Stampings) will to be the sole trader). New users will need to continue to operate from their present offices apply to the Light Metals Control, Banbury, for during August, but from September 1st they licences. Exporters of unwrought aluminium will be amalgamated into one section, operating and aluminium alloys will still need to apply for from the following address : M inistry of Aircraft individual licences authorising them to dispose Production, Light Metals Control, Section LM2, of material to persons outside the United The Vale, Edgbaston Park Road, Birmingham, 15. Kingdom. Users of sheet, extrusions, castings, Although the principal functions of the Fabrica forgings, or other forms of fabricated alu tion Controls, notably the allocation and minium, will be free to place orders direct with approval of orders and the routine progressing fabricators. Fabricators will be free to accept of deliveries will be discontinued, the simplified Service, civil and export orders without reference control organisation will continue to render to the Control. assistance in obtaining supplies for urgent The Control of Magnesium (No. 4) Order, needs, and in ensuring deliveries of materials 1942 will also remain in force. No change is against Government contracts in cases of contemplated in the present procedure covering difficulty. August 3 , 1 9 4 5 174 E l e c t r ic a l R e v ie w FINANCIAL SECTION Company News. Stock Exchange Activities. telescopes, speed indicators, altimeters, gyro Reports and Dividends scopes and instruments for testing radio and The General Electric Co., Ltd.-—Some idea allied equipment. The output ot cable and wire of the immensity of the G.E.C.'s war effort exceeded 1,100.000.000 core yd. including was given by Sir Harry Railing, the chairman, 2.000.000 yd. of very-high-frequency cable. at the annual general meeting on Thursday The first cable harnesses for large aircraft were last week. The claim made nearly sixty years designed by the company. Their output of ago to supply “ everything electrical ” still carbons exceeded one thousand million pieces, stood. The Government had found in the while battery units totalled one hundred million G.E.C. an organisation ready and prepared to and moulded insulation parts exceeded three tackle practically every electrical problem, as hundred million. Mobile rectifier units, ship well as many mechanical ones, making it w-elding equipments, electro-magnets, photo possible to execute the many rush programmes electric appliances, infra-red and high-frequency for new devices or increased production. heating apparatus and furnaces for special The great volume of war work had necessitated purposes, mines, bombs and shells were also largely increased production facilities. The constructed. adaptability and flexibility of their organisation Research work covered ultra-short-wave w as well illustrated by their contribution to the valves, cathode-ray tubes, drilling machines “ Mulberry,” “ Pluto ” and “ Fido ” projects for diamond dies, artificial sapphires for bearings and they could claim to have played a leading and the development of the highest power part in every step of the development of radar. searchlight in the world so far constructed of Well over 100,000 of their telephone and radio 1.000.000.000 candle power. sets had been used by the Services. The pro The change-over from war activity to peace duction of a new form of mine “ sweep ” would not be easy and he hoped that the country urgently needed for “ D ” Day resulted in would understand the circumstances and the almost impossible production schedules being part the G.E.C. had been called upon to play fulfilled. .To meet the enormous demand during the national emergency. for radiolocation and wireless apparatus the The Electric Development & Securities Trust, output of iron powder had been increased eight Ltd., a subsidiary of the General Electric Co., fold and that of crystals three-hundred-fold. Ltd., reports a revenue for the year ended Over 50 per cent, of the national require March 31st amounting to £80,787. A sum of ments for “ Asdic ” submarine detection devices £17,512 was brought in and a dividend of were undertaken, and in a critical period of 8 per cent., tax free, is to be paid, leaving five weeks in 1940 over one million yards of £18,299 to be carried forward. degaussing cable was produced to meet the magnetic mine menace. They had manufactured The Telephone Mfg. Co., Ltd.—Indications of equipment for every aircraft carrier in the the important part played by the company in the British Navy, the plant including generators, w'ar effort were given by Mr. Fred. T. Jackson, motors and control gear. A large share of the the chairman and managing director, at the electric propelling equipment for submarines recent annual general meeting. Among the had been built by the company, together witb principal items manufactured were 1,300,000 considerable numbers of machines and switch microphones, 1,200,000 receivers, 920,000 tele boards for destroyers and corvettes. The phone sets, 70,000 switchboards of all sizes up equipment of several graving and floating docks to 200 lines, the component parts including in different parts of the world had also been 11.500.000 condensers: 1,000,000 iron dust undertaken. cores; 2,000,000 key switches; 2,500,000 plugs: Turbo-alternators had been built for the 2.250.000 jacks; and 15,000,000coils of various U.S.S.R. some of which were combined with sorts. As a result of this war work the company switchgear and transformers to form trans had not been able to proceed with research and portable power units. Large motor generator development work for post-war activities. There sets for chemical purposes, and over 3,000 was plenty of space at their St. Mary Cray flameproof motors had also been made for our factory which could be built on to meet expansion Allies. More than 25,000 generators had gone of peace-time demands. to the Ministry of Supply and the Air Ministry, many of them as part of mobile equipment Greenwood & Batley, Ltd., show a net profit such as landmark beacons, portable floodlights ot £43,864 for the year ended March 31st. after and Army X-ray units. Small electrical providing for E.P.T. and income tax. In the machines and motor-driven appliances for the previous year the figure w-as £44,992. A sum of Services totalled over three quarters of a million. £7,500 (£10,000) goes to contingencies and a For the Admiralty alone more than 300 types final dividend of 10 per cent, maintains the of lamps had been supplied, the total for all the at ^ Per cent., leaving £45,334 Services exceeding 85 million. Facilities for (£38,614) to be carried forward. instrument development and production were Thomas De La Rue & Co., Ltd., record a trading increased by the building of many shadow profit for the year ended M arch 31st last amount factories, and by the end of 1944 the company ing to £486,062, as compared with £275,372 in had been responsible for making half a million the previous year. Adding income from pro instruments covering about 200 different types perties sub-let and £22,000 (£60,000) from sub and patterns. They included A.A. predictors, sidiaries, the total was £509,701 (£336,470) The gunsights, range finders, compasses, tank net profit was £478,683 (£311,629), depreciation August 3, 1945 E lectrical Review 41 C O N T R O L = V E R I T Y S L td ASTON, BIRMINGHAM 6 Air Break Star-Delta Starter Sales Headquarters: BRETTENHAM HOUSE, LANCASTER PLACE, W.C.2 M AKE REGULAR USE OF HARTINDALE COMMSTONES % Cut copper, brass and steel without Over 50 sizes In stock, in 3 grades: coarse, clogging. Edges of every bar left clean ; medium and fine. 20 different types of no dragging of copper. Save 75% of time handle. and cost of turning commutator in lathe. Over 25,000 regular users all over the Give longer life to motors, etc. world. MARTINDALE ELECTRIC C° LI? WESTMORLAND road, LONDON, N.W.9 Phone i Collndale 8642-3 Grams : Commstones, Hyde, London IliimilUIUllUlinillllUHliHIIHnilllllllUHIIIllllllIIIUIIIIIUlllllllilUIUIIIIIlllllllimillllllMIIIIMIIIIIIIIIllllllllIIIIIIIIIIIIIIHIllIIIIIIIIIIIIIIIIIII 4 2 E lectrical Review August 3, 1 9 4 5 THERMOPLASTIC INSULATION (P.V.C) “ P O L Y K O L ” is our registered title and trade mark for plastic ised Polyvinyl chloride, which material is re cognised by B.S.I. Manufacturers of all classes of conductors with rubber or “ Poly- kol ” insulation. August 3, 1945 E lectrical Review 175 account receiving £19,062 (£8,759). Provision for taxes requires £377,500 (£185,000), while Companies’ Returns general reserve receives £20,000 (£50,000). The Increases of Capital dividend is maintained at 40 per cent., leaving £87,170 (£75,387). Steels Electrical Products, Ltd.—The nominal capital has been increased by the addition of Ultra Electric (Holdings), Ltd.— T h e c o m p a n y ’s £34,900 in 34,900 shares of £1 each, ranking contribution to the war effort in the develop p a ri passu with the existing shares, beyond ment and manufacture of radiolocation and the registered capital of £100. £29,900 of the electrical equipment and airframe components increase is with a view to the acquisition of for the Stirling, Mosquito and Warwick air certain assets of Steel & Co., Ltd. craft was referred to by Mr. E. E. Rosen Rheostatic Co., Ltd.—The nominal capital has (chairman) at the annual meeting. He said that been increased by the addition of £130,000 the company continued to occupy dispersal beyond the registered capital of £120,000. The factories under requisition and to operate them additional capital is divided into £100,000 6 per entirely on war contracts. During the past few cent. cum. preference shares of 10s. and 400,000 months, however, it had been possible to devote ordinary shares of 4s. some attention to a resumption of normal business and it was hoped to have Ultra products Robdor Radio & Electrical Appliances, Ltd.—• on the market before the end of 1945. Contact The nominal capital has been increased by the with their subsidiary in Belgium had been re addition of £2,000 in 2,000 ordinary shares of established. £1, beyond the registered capital of £2,000. The Engineering & Lighting Equipment Co., Lacrinoid Products, Ltd.—The nominal capital Ltd., is paying a final dividend on the ordinary has been increased by the addition of £50,000 shares of 5 per cent, (against 6 per cent.). The in 500,000 ordinary shares of 2s., beyond the dividend for the full year is thus reduced from registered capital of £100,000. 10 to 8 per cent. The net profit to March 31st last was £21,356 (against £21,454). Mortgages and Charges Beiliss & Morcom, Ltd., report a trading Strand Electric Engineering Co., Ltd.— profit of £69,352 for the past year (against Satisfaction in full on April 23, 1945, of Land £68,813) and a net profit of £51,478 (£50,886). Registry Charges, all dated March 20, 1939, and The dividend is maintained at 14 per cent, and registered M arch 29, 1939. £166,958 is„carried forward. Volta Electric, Ltd.—Charge, dated June 28th The Globe Telegraph & Trust Co., Ltd., re p o rts on land and Park Works, Barnack Road, a net revenue for the year ended June 30th last, Stamford, to secure £10,000. Holders: Indus amounting to £183,444, as compared with trial Finance & Investment Corporation, Ltd. £182,442 in the previous year. A final dividend of 2 per cent, makes the total distribution 5 per cent., tax free (same) and £142,143 (£134,812) Liquidations is carried fo rw a rd . B. & B. Batteries, Ltd., Caxton Road, The Brazilian Traction Light & Power Co., Ltd., Wimbledon.—Under the compulsory liquidation in its report for 1944, states that all its services, of this company the first meetings of creditors except gas, continue to show expansion in spite and contributories were held on July 24th at the of restrictions in materials available, shortage of Board of Trade offices, Columbia House, man-power and other conditions arising from Aldwych, London, W.C. the war. Both gross revenue and net earnings A draft statement of affairs had been lodged are the highest in the company’s history. showing assets valued at £1,722, against liabilities of £7,240, made up of unsecured The Kalgoorlie Electric Power & Lighting claims £5,594; preferential £1,146;. and Cpn., Ltd., is again to pay a dividend of 5 per debenture £500. Mr. F. R. Brooks, the promoter cent. Profits for 1944 totalled £25,500 (£31,578). of the company, attributed the failure to the Depreciation again receives £16,000 and U.K. effects of the flying-bomb attacks, competition, taxation £2,791 (£6,392) after crediting £1,913 and to improvements in street lighting. A adjustments from previous years. The carry resolution was passed appointing Mr. A. E. forward is £9,405 (£9,727). Attwood, 90, Queen Street, London, E.C., as The Colombo Electric Tramways & Lighting liquidator, with a committee of inspection. Co., Ltd.—It is proposed that the company should be wound up and its contract depart ment transferred to the parent company, the Bankruptcies United Planters’ Co. of Ceylon. The lighting C. H. Boot, radio and electrical engineer, business was sold in 1927 and the tramway formerly carrying on business at 29, Lyndon undertaking a year or so ago. Road, Rubery, near Bromsgrove.— First meeting held August 1st at the Official Receiver’s H. J. Baldwin, Ltd., report a profit for the Office, Somerset House, 37, Temple Street, year ended March 31st amounting to £21,517 Birmingham. Public examination September (£22,517). The dividend is maintained at 10 25th at the New City Court, Birdport, W orcester per cent, and £20,112 (£16,695) is carried forw ard. J. Boult a n d J. H. Bolt, carrying on business as John Boult, electricians, 3, Grosvenor Street, The London Passenger Transport Board is Chester (separate application of J. H. Bolt).— again to pay li per cent, on account of interest Order made June 5th for discharge subject to on London Transport “ C ” stock. bankrupt consenting to judgment being entered The Metropolitan Electric Supply Co., Ltd., is against him for £145. (£145 paid to Official maintaining its interim dividend at 3 per cent. Receiver in lieu of entering up judgment.) August 3, 1945 1 7 6 E l e c t r ic a l R e v ie w British Aluminium at 45s. 6d. but later there STOCKS AND SHARES was a certain reduction. Crabtrees at 43s„ T u e s d a y E v e n i n g . and W. T. Henley’s at 27s. 6d. are 6d. down. Laurence Scott hardened to 13s. 6d. Other S1TOCK Exchange markets suffered a sharp changes in the manufacturing and equipment ^ shake out as a result of the unexpected section are mostly downward, the falls including issue of the General Election. It had been Associated Electrical 56s., English Electric 54s„ taken as a foregone conclusion that Mr. Mather & Platt 52s. 6d., Metal Industries “ B ” Churchill would be returned, although probably 49s. 6d., Revo 44s., and Thorn Electrics 28s. 9d. with a reduced, majority. Few people, if any, Newman Industries are easier a t 7s. 6d., and in the Stock Exchange anticipated the sweeping majority obtained by the Labour Party. In Rothermels at 3s. l i d . Radio companies’ shares are lower, in markets where anything of a speculative position existed, a general fall occurred. The decline company with most of the popular speculative extended more gradually to other parts of the descriptions. Cossors have been vulnerable to House. Prices of purely investment stocks the political conditions; the price at 38s. 9d. is became affected, but a partial recovery took 2s. 9d. down. E.M.I. at about 32s. have place as bargain hunters went round trying to fallen by 2s. 6d. E. K. Cole at 37s. 6d. lost pick up cheap stock. This cleared the 2s. 6d., of which 4|d. is represented by the market of what weak stock there was and the dividend deduction from the price. McMichaels support thus rendered brought about a rally at 8s. are 6d. down. from the lowest prices reached. L.P.T.B. Electricity Supply The London Passenger Transport Board has announced a dividend of li per cent, actual on The one market in the Stock Exchange that its “ C ” stock, the payment to be made on can be relied upon to withstand disagreeable August 24th. This is the same rate as that of shocks is that for the Home electricity supply last year. Six months ago, the dividend for the shares. Preference and ordinary shares in this year was raised to 3 per cent, by the payment department afford meagre rates of interest of a final dividend of If per cent.—a disappoint upon money invested in them at to-day’s prices, ment to the market, which had anticipated a but they do hold their ground at times when repetition of the previously-paid per cent. many other markets are disturbed by nervous The Transport Board is included in the agree apprehensions. Nevertheless on this occasion ment made between the other four railway there were falls in most supply companies’ companies and the Government, whereby the shares both last week and again on Monday, railways receive a certain fixed sum in respect reducing prices by from 6d. to as much as 3s. of earnings, this agreement running for one on the week. year after the termination of war. In the Overseas group, Victoria Falls Transport “ C ” Stock gives a much lower Power are ^ up at 90s. The Indian shares yield on the money than do any of the other have gone back a trifle, Calcutta Electrics to junior stocks of the home railways. The reason 57s. 6d.,. Cawnpores to 59s. and Madras to is that expectation looks for the time when the 39s. 6d., the last-named being a florin down. Transport Board will be free to operate on its By comparison with falls in other industrial own account once more. It is generally assumed markets, these declines are of trifling extent. that a better dividend than 3 per cent, will be Looking Back paid. What is called the standard rate of dividend on the stock is 5j- per cent., but it Cable & Wireless preference fell 4 to 111. needs a good deal of optimism to expect anything The ordinary stock has also been a dull market like this for some years to come. The prior- and the price at 88 is 5 points down. At this, charges of the Board are gilt-edged securities, the yield on the money is £4 11s. per cent., their prices moving in sympathy with the without allowing for the reduced rate of income fluctuations in British Government and similar tax at 9s. 2d. in the £. The present price, by stocks. The 5 per cent. “ B ” stock at 119^ is the way, compares with 49 at the end of August, a point down. 1939, at which' date Globe Telegraph & Trust ordinary shares stood at 29s. 9d. To-day they Globe Telegraph are 44s. Siemens were a guinea when war Globe Telegraph & Trust ordinary shares broke out, comparing with 38s. to-day, and have recently improved to 44s., moving indepen Johnson & Phillips have come up from 38s. to dently of the fluctuations in Cable & Wireless about 78s. Another substantial rise has been in ordinary stock. As a rule, the two prices Telegraph Constructions which, standing at follow each other in their movements very 38s. on the eve of the outbreak of war, are now closely. But while Cable ordinary has declined quoted at about 64s. trom its recent best, Globe ordinary shares Miscellaneous Movements now stand at almost the highest price reached since the £5 shares were converted into £1 stock Walsall Conduits have put on 3s. at 21. in 1937. The lowest during the interval, it Gains of Is. lifted Automatic Telephones to may be of interest to recall, was a guinea, in 70s. 6d. and British Thermostat to 20s. 9d. the dark days of 1940. August 3, 1945 E l e c t r ic a l R ev ie w 177 Stud Welding* English Electric Demonstration DEVELOPMENT of the arc process in A combined flash damper and ferrule locator A the form of stud welding by the English is incorporated in the tool to eliminate external Electric Co., Ltd., was recently demonstrated arc flash and splatter so that the operator is at Yoker, Scotland, by permission of the Clyde not required to be protected; the parent metal Valley Electrical Power Co. The principle is is left clean and nearby personnel are in no way not entirely new, but it is the application of inconvenienced. established principles in a different form that As the complete cycle of operations is is likely to effect saving in time and costs. automatically taken care of once the “ trigger ” Ability to arc weld studs to plates and structures on the tool is closed and no skill is required obviates drilling, tapping and inserting the bolt, either to load or locate the stud, the process is or blanking the plates, and bolting through, so simplified that no difficulty should be the latter necessitating welding round the head experienced in using the equipment, which is of the bolt when sealing is required against designed on robust lines for operation out gas, oil, water, etc. doors in shipyards or on constructional work High speed of operation is attained by using as well as in heavy and light industries. In a pistol-grip tool for the control of the stud. general the main equipment remains stationary Power input from exist ing mains is through double-wound trans formers stepping down to approximately 100 V on the secondary side. A porcelain ferrule surrounding the base of the stud is usually in corporated in order to Rectified AC stud-welding e q u ip m e n t prevent contamination of the weld metal by the air and also to prevent arc splatter. The tool is operated by means of a trigger switch; once the latter is closed the remainder of the opera tion is automatically controlled by a motor- whilst the tool may be taken anywhere within driven camshaft timing device. The current range of the cable. required for a given size of stud is obtained by There are two types of plant. The straight adjustment of a rotary tapping switch on the AC equipment is completely self-contained current regulator and the necessary timing for and oil-immersed, comprising a transformer, a this operation is also easily pre-set by means reactor, timing unit (not in oil), and a primary of a rotary handle on the timing mechanism. contactor, single-phase for 380/440 V input, On the base of the stud is a small pip in order mounted on wheels. Protection on the primary to initiate the arc. The stud is pushed against side by a 100-A double-pole fuse switch is the plate by means of the tool and when the recommended. This equipment is designed to pip is fused by the passage of the welding weld studs up to J in. diameter when using current, the stud is held in suspension to allow secondary leads not more than 50-70 ft. long. arcing to take place for a predetermined time, The limitation of cable is necessitated by the at the end of which time period the stud is high reactive drop in long cables due to the plunged into the molten pool. The complete fairly heavy instantaneous currents employed. operation takes less than one second. The The rectified AC equipment is designed to plunging of the stud forces out surplus metal operate from the seconaary side of any standard from the pool, which forms into a collar con multi-operator (three-phase) arc-welding trans tained by the ferrule. The collar metal can be former (usually available on site) the three- removed by means of a hollow cutter without phase oil-immersed static rectifier tank also impairing the strength of the weld: containing the source of 50-V DC for operating B 178 E l e c t r ic a l R e v ie w August 3 , 1 945 the auxiliaries. A third unit (which is mounted concerning voltages allowed on a ship, namely on wheels) comprises the current control circuit DC at approximately 100 V. When regulator and the timing device. It is admirably using 015 sq. in. cable, J- in. diameter studs can suited to shipyard work as the transformer and be welded 200 ft. from the transformer; f in. rectifier can be on shore, or at ground level, diameter studs reduce the distance to about while the control unit may be taken on to the 120 ft. while smaller sizes allow up to perhaps deck, thus complying with the regulations 500 ft. if necessary for ^ in. studs. Electrical Contractors President’s Address and Report A DDRESSING the recent annual meeting Apprenticeship and Training Council but of the Electrical Contractors’ Association representations were now being made to the and its allied organisations, the president (M r. W. Ministry of Works for the establishment of a Riggs, M.B.E., M.I.E.E.) said that after con recognised separate Council especially designed tinuing in office throughout the war he was to meet the needs of the electrical contracting handing over to Mr. R. H. M. Drake. The in d u stry . president stressed the need for industry to make During the past year the membership had all necessary adjustments in existing practices increased from 1,653 to 1,731; before the war in order to secure commercial efficiency. He it was 1,897 and in 1943 it fell to 1,597. said that the Fair Trading Council was giving consideration to the wholesale distribution side. Too often wholesalers primarily connected with another industry introduced themselves into the LM.E.A. Centre Meeting electrical industry and it was they who accorded A T the annual meeting of the South-West trade terms to retailers who were not qualified -^“ -England and South Wales Centre of the under the terms of the Fair Trading Policy, a I.M.E.A. held at Bristol recently, Alderman diversion of trade which did not benefit either W. J. Lewis (Portsmouth) was elected chairman the general public or the electrical industry. in succession to Mr. Edward Jones, chief electrical Mr. Riggs said that the agreements between the engineer and manager, Cardiff. Alderman Association and groups of manufacturers had Lewis said he con continued and he made a strong plea for mutual sidered it a compliment support between organised trading associations to himself and his and for the support of their appropriate organisa authority to be the first tions by members of the industry. After a local authority member mention of the new “ N.E.C.T.A.” sign, Mr. to fill this office. He Riggs said that the Association was making a paid a tribute to the big drive to secure that the qualified electrical retiring chairman for contractor and retailer should be the recognised the manner in which he source of supply of current-consuming devices. had expedited the work There were great opportunities and the con of the Centre since his tractor and retailer would fail in his duty to the election in 1943. Mr. community, and to himself, if he did not take Dawson Thomas, chief full advantage of these opportunities. electrical engineer and The Association favoured the compulsory Alderman W. J. Lewis maMger Abertillery, registration of electrical contractors and opera was elected vice- tives as a means, not of restriction, but of en chairman. The retiring members of the suring good service to the public. He had been Executive Committee were re-elected. They disappointed that B.E.A.M.A. had not supported were Mr. G. J. Hollyer (Torquay); Mr. L. V. the scheme so much as it might have done, but Turner (Taunton); Mr. H. Jackson (Cardiff); the National Register of Electrical Installation and Mr. T. R. Evans, hon. secretary and treasurer Contractors had advocated the adoption of of the Centre (Rhondda). compulsion. The centre has 56 constituent members (under Good relations with the Electrical Trades takings) covering the Central Electricity Board Union had been maintained during the year and grid area, 39 being in “ A ” Group, 11 in “ B " progress had been made towards the operation Group and 6 in “ C ” Group. The retiring of national working rules, as distinct from local chairman in his report stated that a number of rules. The holidays-with-pay scheme was executive meetings and two special general working smoothly. A new agreement had been meetings had been held since the last annual made between the National Federated Electrical general meeting, one special meeting being Association and the Association of Supervising i xrrcSS?d bL Mr' Lilwall> President of the Electrical Engineers. i.m .e.a., who was accompanied by Mr. J. W. The E.C.A. had participated in the Building bimpson, the general secretary. Angus/ 3, 1945 E l e c t r ic a l R e v ie w 179 NEW PATENTS Electrical Specifications Recently Published The numbers under which the specifications will be or other articles.” 16521. October 8th, 1943. printed and abridged are given in parentheses. (570538.) Copies of any specification (1.9. each) may be E. A. Hinksman.—“ Alternating current obtained from the Patent Office, 25, Southampton voltage regulating transformers.” 18361. Buildings, London, W.C.2. November 5th, 1943. (570509.) KT.-GES. Brown, Boveri & Cie.—“ Device P. L. Hunting, F. C. Bowring and R. H. F, A for the sparkless interruption of a multi Boot.—■“ Underwater welding.” 21056. phase circuit.” 15428/43. October 9th, 1942. December 15th, 1943. (570512.) (570526.) Igranic Electric, Co., Ltd., and J. R. Taylor.— Automatic Telephone & Electric Co., Ltd.— “ Control systems and apparatus for three-phase “ Impulse senders for use in telephone or like induction motors." 17352. October 21st, 1943. systems.” 21271/43. December 21st, 1942. (570632.) (570612.) H. W. K. Jennings (B. F. Sturtevant Co.).— Birmingham Electric Furnaces, Ltd., A. G. “ Electrostatic precipitators.” 17197. October Lobley and P. F. Hancock.—“ Nitriding 19th, 1943. (570630.) processes.” 2706. February 18th, 1943. Landis & Gyr Soc. Anon.—“ Short-circuiting (570570.) device for electrical terminals.” 6841/43. R. V. Boardman.—“ Electric arc lamps.” June 27th, 1942. (570576.) 19520. November 22nd, 1943. (570607.) Marconi’s Wireless Telegraph Co., Ltd., and E. R. Booth and S. Marks.—“ Multi-way C. P. Beanland:—“ Tuning arrangements for electric switches." Cognate applications 279/44 radio receivers.” 17441. October 22nd, and 8464/44. January 6th, 1944. (570579.) 1943. (570636.) British Thermostat Co., Ltd., E. McGowan Marconi’s Wireless Telegraph Co., Ltd., and and W. F. F. Martin-Hurst.—“ Thermostatic C. P. Fagan.—“ Electrolyte for secondary expansion valves.” 19294. November 18th, electrical batteries.” 11560. September 9th, 1943. (570604.) 1941. (570559.) British Thomson-Houston Co., Ltd.— Maschinenfabrik Oerlikon.—“ High-tension “ Resinous condensation products.” 15255/42. transformers.” 3405/44. March 15th, 1943. November 1st, 1941. (570520.) “ Resinous (570550.) condensation products prepared from alde A. Morgan.—“ Electrically operated hoist gear.” 14193. August 31st, 1943. (570599.) hydes and diazine derivatives.” 18114/42. December 31st, 1941. (570569.) “ Electric Milliard Radio Valve Co., Ltd.,- and R. W. Kersey.—“ Photo-electric cells and to control valve circuits.” 10267/43. June 29th, 1942. circuits incorporating such cells.” 14582. (570591.) British Thomson-Houston Co., Ltd. September 6th, 1943. (570601.) Patentverwertungs-Patelhold & Elektro-Hold- (General’ Electric Co.).—“ Methods of drying ing Akt.-Ges.—“ Systems for the secret electrical plastic materials formed of powdered metal transmission of speech.” 4286/43. December and a plasticising medium.” 16360. October 20th, 1941. (570488.) 6th, 1943. (570535.) Precision Developments Co., Ltd., and G. British Thomson-Houston Co., Ltd., and Olah. — “ Contacts in electrical switching A. P. Castellain.—“ Screens for stereoscopic devices.” 6791. April 29th, 1943. (570521.) projectors.” 11341. July 13th, 1943. (570594.) T. Price & Son (Stampers), Ltd., and E. E. British Thomson-Houston Co., Ltd., and Price.—“ Electrically-heated cooking vessels and C. O. Titley.—“ Control and testing circuits kettles.” 14967. September 13th, 1943. using gas-discharge tubes.” 13808. August (570525.) 24th, 1943. (570502.) E. S. Russell.—“ Electromagnetic switches British Thomson-Houston Co., Ltd., and for effecting repeated timed interruption of T. W. Wilcox.—“ Gas-blast electric circuit- circuits.” 17371. October 21st, 1943. (570634.) breakers.” 12832. August 9th, 1943. (570496.) Siemens Electric Lamps & Supplies, Ltd., British Thomson-Houston Co., Ltd., and J. N. Aldington.—" Metal vapour electric M. G. Clarke and H. R. Ruff.—“ Thermal discharge lamps.” 6467. May 20th, 1941. responsive electric switches.” 16939. October (570583.) 15th, 1943. (570622.) Soc. d’Electricite Mors.— “ Regulating device F. Caldwell and Metropolitan-Vickers Elec for fluid-operated systems.” 22282/39. August trical Co., Ltd.—“ Shaping machines.” 6724. 2nd, 1938. (570487.) April. 28th, 1943. (570490.) H. Sonnenfeld.—“ Power cable and means Cinema-Television, Ltd., G. A. R. Tomes for producing it.” 17587. October 26th, 1943. and W. Blackman.—“ Photo-electric cells.” (570640.) 8506. July 5th, 1941. (570553.) R. L. Taylor and Crompton Parkinson, Ltd. Compagnie Générale de Télégraphie sans —“ DC generators.” 13154. August 13th, Fil.—“ Radiators of radio electric waves.” 1943. (570497.) 12051/42. June 15th, 1940. (570568.) H. H. Thompson, A. E. Davies and M. D. Concordia Electric Wire Co., Ltd., and G. N. Thompson.—“ Magnetic separators.” 21868. Fox.—“ Method of forming a die for coating December 30th, 1943. (570515.) wires.” 16968. October 15th, 1943. (570623.) W. B. Whitney and British Electrical & R ‘Cruickshank, Ltd., E. A. Ollard and S. Allied Industries Research Association.—“ Gas- Potts —“ Apparatus for use in electrically blast AC arc-rupturing devices.” 20979. or otherwise treating the surfaces of metal December 14th, 1943. (570511.) August 3 , 1 9 4 5 ISO E l e c t r ic a l R e v ie w CONTRACT INFORMATION Accepted Tenders and Prospective Electrical Work Contracts Open Contracts in Prospect W h e r e “ Contracts Open ” are advertised in our Particulars o f new works and building schemes fur " Official Notices " section the date o f the issue the use o f electrical installation contractors and is given in parentheses. traders. Publication in this section is no guarantee Bradford.—August 29th. Corporation, Static that electrical work is definitely included. Alleged transformers. (See this issue.) inaccuracies should be reported to the Editors. Brighouse.—August 31st. Town Council. Aberdeen. — Houses (1,500) for Stewarts Transformers and switchgear. (See this issue.) Estates (Aberdeen), Ltd.; Jenkins & Marr, Chichester.—August 17th. City Council. civil engineers and architects. About 20 miles of 11-kV and control cables and Ancoats.—Additions, Hospital, Upper Kirby accessories. (July 13th.) Street; T. Worthington, architect, 178, Oxford Glasgow.—August 31st. Corporation Light Road, Manchester, 13. ing Department. 500 lanterns for 300-1,500-W Ashton-under-Lyne.— Electrification of sewage electric lamps. Specs, etc., from the Lighting works; manager. Department, 20, Trongate. Bangor.—Extensions, Caernarvonshire and Manchester. — August 11th. Transport Anglesey Infirmary (£100,000); Board of Department. Trolley-bus overhead equipment Management. materials. Particulars from general manager, Beiper.—Houses (42); R.D.C. building sur 55, Piccadilly. veyor, Wellington House. Sheffield. — August 27th. Electricity Bolton. — Catholic schools; Rev. Father Department. Three 1,000-kVA 11,200 3,300-V Chronnell, St. Edmund’s Rectory. transformers. (See this issue.) Wilton.—August 25th. Borough Council. Coventry.—Primary school, Sadler Road, Supply and erection of a public lighting installa Keresley; city architect, la, Warwick Row. tion in the borough. Borough surveyor, Edmonton. — Maternity accommodation, Municipal Offices, Fugglestone House, Wilton. Chase Farm Hospital (£51,650); Middlesex county architect. Orders Placed Exeter.—Houses (176), Wonford estate and Birmingham. — Electricity Committee. temporary shops (£50,000); city architect. Accepted. Moto ' generator set.— Metropolitan- Hove.—Houses (54), The Knoll, for B.C.: Vickers. Reconditioning of five additional borough surveyor, Town Hall. oil cooler tube nests.— C. A . Parsons & Co. Kilmarnock.—Kitchens and dining rooms for Automatic fire protection equipment at Hams school meals (£9,000); county clerk, Ayr. Hall “ B ” power station.—Pyrene Co. Manchester.—Factory, Fitzgeorge Street, Salvage Committee. Accepted. Electric Collyhurst; P. Cummings, architect, 16, Oxford vehicle batteries.— D.P. Battery Co., Chloride S treet. Electrical Storage Co., Britannia Batteries and Tudor Accumulator Co. Middlesex. — Temporary and permanent Bradford.—Electricity Committee. Recom school extensions (£175,000); county architect. mended. Boiler.—Babcock & Wilcox. Grit Newbury.— Houses (22), Valley Road; A. J. and flue dust extraction plant.—British Vacuum C h iv ers. Cleaner & Engineering Co., Ltd. 6-6-kV Newcastle - under - Lyme. — Houses (101), metal-clad switchgear.—A. Reyrolle & Co. Beasley Farm Estate, Chesterton; town clerk. Electrically-operated circulating water valve.— District Bank House, Penkhull Street. J. Blakeborough & Sons. Northwood.—Conversion of Ryefield Court as Brighton.—Public Utilities Committee. Ac health centre, with electrical work; Middlesex cepted. Switchgear (£7,633).— Allen West. county architect. Manchester. — Electricity Committee. Scunthorpe. — Laundry; Scunthorpe Co Accepted. 33-kV switchgear extensions at operative Society, Ltd., High Street, Barton power station.—B.T.H. Co. High- pressure steam and feed-water pipework, Smethwick.— Houses (134); borough engineer. Stuart Street generating station.—Babcock & Council House. Wilcox. Do. valves.—Hopkinsons. Cable tee South Shields. — Factory, Riverside Estate, boxes (twelve months’ requirements).—W. for Shaffer, Ltd.: H. E. Pitt, Ltd., builders, Lucy & Co. Bowl refractors for street lighting. Leopold Street, Millfield, Sunderland. — V eritys. Stretford.—Saw mills, etc., Barton Dock Rawtenstall. — Electricity Committee. Road; Reif and Son, Ltd., timber merchants, Accepted. Cables.—Henley’s. Barton Dock Road. Sheffield. — Electricity Committee. Accepted. Swinton. Extensions; Weston Evans and Ash-handling plant for Neepsend power station Co., lubricating engineers, Manchester Road, (£59,207).—Stirling Boiler Co. C lifto n . Warrington. — Electricity Committee. „,J!UirS0i r fi arb0Llr improvements (£60,000): Accepted. Air insulated switch unit (£259).— clerk to Harbour Trust. Ferguson Pailin. Repacking condenser tubes (£850-£900).—English Electric Co. Aspafrian'~~FaCt0ry; L am a’ Ltd ’ Queen Street’ August 3, 1945 E l e c t r ic a l R e v ie w 43 A Urge 4-circuit he«vy duty Baltoy Charger, incorporating metal rectification with improved cooling tydom. Output Rating: 3 Kilo Watti. F. (. HEAYBERD & ( 0. LTD Head Office: 28, R U S S E L L S Q U A R E , W.C.1. Telephone: Mus. 64)2 NER t Mallory high conductivity copper alloys swlichgear, arc and induction furnaces, provide electrical engineers with cast resistance welding machines, transformers materials which, while retaining the high and other equipment. This means a freer current-carrying capacity of copper, com hand in meeting the many combinations of bine with it the strength and hardness of mechanical and electrical requirements. steel. Designers, therefore, need no longer be limited on the one hand by the poor mechanical strength of copper castings, nor MALLORY on the other by the relatively low con ductivities of the brasses and bronzes. Fuller details of Mallory 3 and other Mallory alloys Lighter yet stronger castings are now are given in our technical booklet “ Mallory Castings ” available for the current-carrying parts of which will be sent on request. MALLORY METALLURGICAL PRODUCTS LIMITED An Associate Company of JOHNSON, MATTHEY & CO. LTD. 78 Hatton Garden, London, E.C.I. Telephone : HOLborn 5027 G.D.55 August 3 , 1 9 4 5 4 4 E l e c t r ic a l R e v ie w -AGRO BAKELITE BLOCKS-, THE ALTERNATIVE TO WOOD BLOCKS AS SUPPLIED TO THE A IR M IN IS T R Y PROMPT DELIVERY No. 5050 Round type for one I” o r 2 Y 5-ampere switch. No. 7070 Round type for one 2" centre Ceiling Rose. No. 8080 Oblong type for two 2" or 2y" 5-ampere switches. BROW N BAKELITE Marketed by T.M.C. HARWELL (SALES) LTD. BRITANNIA HOUSE, 233 SHAFTESBURY AVENUE, LONDON, W.C.2 Telephone : TEMple Bar 0055 (3 lines) Telegrams : “ Arwelidite, Westcent, London ' DAY AND NIGHT ELECTRIC SERVICE FOR QUICK RELIABLE REPAIRS AND REWINDS THE MIDLAND DYNAMO Co. Ltd. LEICESTER Phone 20172 (3 lines) ELECTRIC FIRES Efficient and Artistic Make your post-war plans now for sales of Angelus Fires London Office INGRAM, KEMP & JOYNER 21 Gt. Suffolk St., S.E.I NEWTOWN ROW BIRMINGHAM 6 August 3, 1945 E l e c t r i c a l R e v i e w Rowlands Electrical Accessories Ltd., R.E.A.L. Works, Birmingham 18 4 6 E l e c t r ic a l R e v ie w August 3 , 1 9 4 5 ACatice ta J/lanufuctu%e%6 OF COOKERS, HEATERS, IRONS, TOASTERS AND OTHER DOMESTIC APPLIANCES If you need Resistance Wire, Tape, Insulators, Beads— or Advice, write to LIONEL ROBINSON & CO. LTD. Head Office:-3 STAPLE INN, LONDON, W.C.I OR BRANCHES AT 102 Abbey Street, Accrington, Lancs. 7 Springfield Street, Warrington, ,, 25a, Winckley Square, Preston, ,, The Fairway, Rowlands Castle, Hants in modern plastics Only the highest skill can produce the beauty, accuracy and finish of modern PLASTIC RAW MATERIALS plastic articles. Our service provides that skill and can produce large quanti IN SHEETS, RODS & TUBES ties of plastic and rubber mouldings quickly. EBONITE LAMINATED BAKELISED SHEET CASEIN CAST RESIN IORIVAI ETC. PLASTICS 53b, CITY ROAD Products in Plastics, Rubber and Synthetic Rubbers. LONDON, E.C.I UNITED EBONITE & LORIVAL lim iter LITTLE LEVER, NeXR B O L T I N ,Q August 3, 1945 E l f c t r ic a l R e v ie w 47 W hen Ampere w a s e i g h t To say th at we were in existence before electrical science grew into an industry would m ean little if advantage had not been taken of the opportunities offered by the succeeding years. How we grasped these opportunities can be seen in the service we render to electrical m anufacturers today; a service which has grown w ith the increasing dem ands of an industry throughout its lifetim e. Ampère lived through a social revolution; Thom as Bolton’s have w itnessed, and played a part in the greatest industrial revolution in history. ESTABLISHED 17 813; S O N S , L T D , Specialists since 1783 COPPER AND COPPER ALLOY MANUFACTURERS, WIRE, SHEET, STRIP, STRAND, PLATES. BARS, RODS, TUBES, SECTIONS, MACHINED PARTS. Contractors to Home, Colonial & Foreign Government Services ; Railway & Transport Companies HEAD OFFICE : WIDNES, LANCS. (Telephone WIDNES 2022); LONDON OFFICE : 168 REGENT ST., W.l (REGENT 6427-8-9) CVS- 1 3 3 , 1 9 4 5 48 E l e c t r ic a l R e v ie w August ■— ------—•■ -rr-y. THE BRIGHTRAY SERIES OF ALLOYS for all resistance purposes m m ' ¡W ■ mm. M l >, w m m High Quality AVAILABLE IN GRADES 1 I Uniformity SPECIALLY SUITED TO INDIVIDUAL Reliability APPLICATIONS x a ~C*. HENRY WIGGIN & COMPANY LTD Grosvenor House, Park Lane, London, W.l A t la s t ELECTRIC COOKING perfected'/ Instantly set at any point between zero and full load, the SIMMERSTAT * all-heat * hot-plate switch provides ‘ gas-tap ’ control, ideal for all simmering operations. No waste of current and fitted in a few minutes in place of the . usual 3-heat switch. Price complete 17/6 (subject). Write today for full details. 9 1 SIMMERSTÄT Continuously Variable Hot-Plate Control Developed, patented and distributed only b y - , Now at their new address Sunric Controls Ltd.. Stanhope House, Kean St. London, W.C.2. 34 VICTORIA ST., LONDON, S.W.I. ABBey 5973 August 3, 1945 E l e c t r ic a l R e v ie w 49 PORTABLE SPEED INDICATORS (HAND TACHOMETERS)] FOR LABORATORY, ENGINE ROOM AND FACTORY VARIOUS RANGES OF SPEEDS UP TO 12,000 R.P.M. We invite your enquiries EILIOTT BROTHERS (LONDON) LTD CENTURY WORKS, LEWISHAM, S.E.I3 ESTABLISHED IBOO 'PHONE: TIDEWAY 3232 August 3 , 1 9 4 5 5 0 E l e c t r ic a l R eview To PREVENT damage to your Electric Cables by fire PR O TEC T them with NEWALLS MOULDED ASBESTOS Full particulars from: — Newalls Insulation Co. Ltd. WASHINGTON, Co. DURHAM I' A I M T 0 N <9 wmipatu/ k un d id t I X t S 1 H »1 P E II IT 1 1 V P III RADIO INSTRUMENTS LTD PURLEY WAY, CROYDON. Telephone: THOrnfon Heath 3211 WIRE WHEELS AND BRUSHES We manufacture a full range of Wire Brushing Wheels and Brushes for Muni tions, and have solved many problems in brushing and cleaning shell cases, bomb castings, hand grenades, fuse parts, etc. ^ Send your Brushing or Cleaning problems to us for immediate attention W ffsnnn: & c° ltp GREAT HAMPTON STREET, BIRMINGHAM 18 5 2 E l e c t r ic a l R ev iew August 3 , 1 9 4 5 WATERTIGHT - YET EASILY OPENED “ ELKINGTON GATIC t > * MANHOLE COVERS .* LARGE- AREA MULTIPLE COVERS * DUCT COVERS ALL. SIZES TO SUIT ALL TRAFFIC CONDITIONS THE DOVER ENGINEERING WORKS LTD. Bypass Road WATFORD A STANDARD STOCK SIZE PAVEMENT COVER PHONE : W ATFORD 5666 TELEGRAMS: ENGINES, WATFORD LANCOMOTORS LIMITED Manufacturing . Electrical . • Engineers . Specialists in the manufacture of COILS Shunt, Series, Commutating, For war purposes, ‘Ticonal ’ magnets have Brake, Armature, etc., etc. proved far superior to any other permanent magnets.* For industrial and communica Electric Motors and Equipment tions purposes they are equally unrivalled. 'R eg isu red\ made to Customers’ Specification T rade I 'TICONAL'C M ark / PERMANENT MAGNETS m ade by CLOUGH ST., HANLEY m v l l a r d £«} STOKE«ON*TRENT mpenon.yoj «piÄSteteßÄsä; Ticonal —made by Mullard. For full uch- TELEPHONE 2378-9 Lid W : v P -' Mz!l,ard Service C o. Ltd., C.mary House, Shajusourj Avenue, London, W.C .2 (5-V> August 3, 1945 E l e c t r ic a l R ev ie w Exact performance data — for Crompton Switchgear. Switchgear performance can be analysed exactly in the Short-circuit Testing Station. Crompton Parkinson are members of the Association of Short-Circuit Testing Authorities, the members of which can issue certificates of rating when tests, in accordance with the appropriate specifications, have been complied with. The Crompton Short-circuit Testing Station is capable of testing up to 350 MVA at 11 kV and 75 MVA at 400 volts. The rated per formance and dependable operation of Crompton Switchgear is thus assured. CRomPToir'PRRKinsoii LIMITED ELECTRA HOUSE, VICTORIA EMBANKMENT, LONDON, W.C.2 a n d Branch««. 5 4 E l e c t r ic a l R e v ie w August 3 , 15*45 LIGHTING FITTINGS Years of research combined with practical experience are behind the “ Wigan ” range of flame-proof Lighting fittings. Each unit complies fully with require ments of B. o. T. Mines Dept., l-i'J'O-ÓJj Buxton. 4 IEYES o f li)ic j,a n HEYES & CO. LTD., WATER HEYES ELECTRICAL WORKS, WIGAN dm 1355 ELECTRIC LIFTS One of the most important features in connection with the rebuilding of Industry will be the modernisation of Electric Lift Service. We should be very happy to send a technical representative to advise on the best type of Passenger, Goods or Service Lift for ^ o u r Offices, W orks o r Canteen, without the slightest obligation. On account of the anticipated heavy demand on our services, your prompt enquiries would be greatly appreciated and will avoid possibility of long delivery WE CAN EITHER SUPPLY delays. or KEIGHLEY LIFTS Ltd. PREFERABLY MAKE THESE ( D e p t . 3) LO N D O N OFFICE : A D A P T O R S 9 Victoria Street, S.W.I. Phone : Abbey 4184 LEEDS OFFICE : from Lampholders supplied by you Bardon Chambers, Infirmary St. Phone : Leeds 26518 KEIGHLEY OFFICE : Dalton Lane. Phone : Keighley 3298 HELIOS LABORATORIES MANCHESTER OFFICE : 6 Angel House, Pentonville Road Haworth Buildings, 5 Cross St. Phone: Blackfriars2903 BIRMINGHAM OFFICE : LONDON, N.I. Telephone: TER. 2256-7 Unitas House, 24 Livery Street. Phone : Central 6552 August 3, 1945 E l e c t r ic a l R e v ie w 5 5 S All steel construction ; enclosed active material imr for constant capacity ; chemically inert and thus free from deterioration when not in use ; can be installed in proximity to delicate apparatus ; unharmed by over-charging, rapid discharging or iW short-circuiting; light in weight; simple to operate ; long life—all these characteristics will doubtless meet your battery problem with advantage. KJIIJFE BATTERl'E LIMITED------HUNT run END . REDDITCH ocnniTru . WORCESTERSHIRE 5 6 E l e c t r ic a l R e v ie w A ugust 3 , 1 9 4 5 re you buyin in the best m arket? Whatever your annual ex penditure for electric lamps may be, you will show an immediate saving by buying Atlas Lamps. Subjected to the most exhaustive tests at every stage of manufacture they are guaran teed to conform to the highest possible standard of efficiency. Instal Atlas Lamps and you will see the difference in quality and the extra discounts you receive will lighten your annual bill. Write for terms to-dav. ATLAS LAMPS Nothing better has come to light THORN ELECTRICAL INDUSTRIES LTD., 1 0 5 -1 0 9 , JUDD ST., LONDON, W .C.l. 'Phone: Euston 1183 Northern Branch: 5 5 Blossom Street, Manchester. 'Phone: Central 7461 N.E. Depot: 46 Sandhill, Newcastle-on-Tyne, 1. 'Phone: Newcastle 2 4 0 6 8 T .lS August 3, 1945 E l e c t r ic a l R e v ie w 57 / THE MODERN TIME SAVING IMPREGNATING MEDIUM Executives in charge of the production of electrical apparatus calling for impregnation, should send for the HY-MEG Booklet “Stability in Insulation”. It describes fully how HY-MEG scientifically overcomes problems arising both in production and in operation. Apply on Business Heading or Card and enclose 2d. to comply with the Control of Paper Orders. LEWIS BERGER & SONS, LTD. (Estab. 1760) LONDON, E.9. Phone: AMHerst 3321 MANU r ACT!' R E R S OF IMSUI A T 11-1 G VARNISHES & ENAMELS G 5 8 E l e c t r ic a l R e v ie w August 3 , 1 9 4 5 MICA TUBES : Round, Square o r Rectangular, in MICA for all Electrical Gear and D om estic Mica or Bakelite. Appliances. MICANITE : In Moulding, Flexible and MICAFOLIUM * MICA PAPERS • MICA Commutator qualities. CLOTH * STEEL TUBES A ND BARS HEATER MICANITE for Domestic and INSULATED WITH MICA OR BAKE other Electrical Appliances. LITE ' LEATHEROID * FIBRE BAKELITE MICA: Uncut or cut to size and calibrated. SHEET, ETC. Contractors to Admiralty, Air Ministry, W ar Office and other Government Department lists. H. CLARKE & CO. ATLAS WORKS PATRICROFT (MANCHESTER) LTD. MANCHESTER Telephone : ECCLES 2001-2-3-4-5 Grams :Pirtoid, Phone, M’ehester MICANITE OIL HEATING We have developed a new range of Electric Oil Heaters for use with Creosote “ B " and Creosote/pitch " C .P .” m ixture. 9 Price* and « Specifications M on application. gj ARCHD. LOW ELECS. LTD. S Nawarthill, Motherwell, Scotland DYNAMO & MOTOR REPAIRS LTD. Wembley Park Works WEMBLEY, MDDX. Wembley 3121 August 3, 1945 E l e c t r ic a l R e v ie w 5 9 rOILITE’ APPLICATIONS IN THE ELECTRICAL FIELD O I LITE SELF-LUBRI C ATING BRONZE BEARINGS ' Oilitc * is in service on Electrical Equipment rotating at over 20,000 R.P.M. and is approved foi 5,000 lbs. per sq. in. pressure when limited motion is involved. Sufficient lubricant is impregnated in the cellular structure of ‘Oilite’ to meet variations in speed, load and running conditions over a considerable range, but where necessary, additional lubrication can be embodied in the design. The limits of accuracy arc equal to the highest grade of Machined Bearings, thus assuring intcrchangcability and case of assembly. THE MANGANESE BRONZE & BRASS C O. LTI) H jW d i o i u ) w o r k s , i p s w i c h TELEPHONE IPSWICH H 27 TELEGRAMS "BRONZE IPSWICH" E l e c t r ic a l R e v ie w August 3 , 1 9 4 5 McKechnie Non-Ferrous Ingots are uniform in composition and therefore easier to melt and handle. Produced by a perfect plant under constant supervision to the correct analysis, the McKechnie range of Non-Ferrous Ingots covers the entire need of the Brass Foundry. McKechnie Chill Cast Bars are closer in structure than Sand Cast Bars and possess greater homo geneity and resistance with an absence of segre gation. They are clean, concentric and sound. Apart from the saving on tool costs and labour which naturally follows the use of Chill Cast as against Sand Cast Bars the saving in scrap and turnings is very considerable. "if* MVKECHNIE BROS. Ltd. Brass, Aluminium Bronzes &High Strength Brass Rods, Stampings & Non-Ferrous Ingot Metal Manufacturers ROTTON PARK STREET, BIRMINGHAM 16 ELECTRIC T O O L S £ . ALL TYPES ALL VOLTAGES ALL WATTAGES jo iAi HALL (t o o l s ) ltd CARDIFF - - - 22-24, Morgan Arcade M A D E TO LATEST BIRMINGHAM - 8, Snow Hill B.S.I. SPECIFICATION BRISTOL - - - 7, Broad Quay and 3, Augustine’s Parade N E W P O R T - - - 81, High Street SWANSEA - 93, Brynymor Road CO and I, Northampton Place Ensel Electric LTD A Try any one of our depots for your electric 3 0 8 ,GRAYS INN R9 LONDON,W.C.I tools—they will help you all they can. t e l e p h o n e TERminus6255-6 RP-436C August 3, 1945 E l e c t r ic a l R e v ie w (.Supplement) 61 The Medway Corrugated Paper Co. Ltd., New Hythe, Nr. Maidstone, Kent. i_jjndon Sales Office : Blackfrian House, Nero Bridge Street, London, B.C. 4. 62 (Supplement) E l e c t r ic a l R e v ie w August 3, 1945 ELECTRIFICATION Kenyon "Underdriven" Group System "K.V." Short Centre individual Drive Clutch Drive 2/3 Card Synchronous Drive The comprehensive Kenyon Service is at your disposal \ VWm. KENYON & SONS, LTD., Dukinfield, CHESHIRE J ^ ^ ■hiiii mini m it » mr— r— KV 32 J / w & e cvTvnecCtims n e e d V.Q. For speed and lasting efficiency in dealing with damaged connections SCRUIT ONE PIECE PORCELAIN CONNECTORS are most satisfactory. QUICKER THAN THE ’PHONE T w ist t h e The Easco CALLBOY provides more rapid and more efficient e n d s o f executive control than possible by ordinary telephone. No the broken operator to delay you. No hand instrument to hold. Ju st press a key for instant connection. Yonr call takes priority and you can w i r e s i n speak to one or several departments at once. t o t h e Standard installation consists of one Master Communicator for “ Scruit ” executive use and six micro-speakers for sub-stations. and thejob is d o n e , W rite for particulars Dept, A6 neatly and p e r f e c t l y in su lated . Distributors : S. O. Bowker Ltd., 19-21 Warstone Lane, Birmingham, and GEE (Birmingham), Ltd., 2.49 Icknield Street, Birmingham Made by V.C. MANUFACTURING CO. LTD., EASCO ELECTRICAL 6-8 Brighton Terrace, London, S.W.9 CORST ROAD, PARK ROYAL, LONDON, N.W.10 Phone & Grams .... BRIxton «41-3 T.A.4 August 3 , 1 9 4 5 E l e c t r ic a l R e v ie w (,Supplement) 6 3 64 (Supplement) E l e c t r ic a l R e v ie w August 3, 1945 E f f i c i e n t W h o l e s a l e S e r v i c e ! SWITCH t FUSE GEAR. WIRING EQUIPMENT AND ACCESSORIES fluorescent lighting. ILMA LAMPS DOM ISTIC APPLIANCES VAN DORN AND WOLF TOOLS. C.M.A.. SANDERS, M.E.M.. M.K. CRABTREE, WYLEX. NETTLE, BRITMAC, BENJAMIN. M.S.M. are specialist manu COOLICON B L A C O . TENBY facturers of tilting type mercury switches suitable for instrument Sand enquiries and orders to: work, domestic and industrial ap paratus and power control gear. RD JOHNSON, C1.A.PHÁM & MORRIS LTD. 7-9, SWAN STREEI,--MANCHESTER, -t THE MERCURY SWITCH MANUFACTURING CO. LTD. P h o n e - DbAnr.rjTo 'i 4 n I WEST DRAYTON, MIDDLESEX HEAD OFFICE. JACEM HOUSE. TAAFFORD PARK, M/c 17 __ _ ¥ 1 1 CMfltTEMI «CCIKKVW MIA|IIC WELLS c m I u iis M IUttlUKUf» OIL FILTERS U l f l f V M C give 0 1 D Oil NEW LIFE With Wells' Waste Oil Filter you can use your oil several times over and change it more often. A thoroughly reliable supply of oil is assured with the use of Wells’ Special Filter Pads which work in conjunction with Wells’ Patent Siphon Feed. T U 8 Í COMPANY LIMITU IU0CATÍ Hill 8 I R M IN (MAM *>•** €** r/4f M A V I '»LACAmêt0*tM*mM* S Sales Depots : London - 88 Goswell Road, E.C.I Newcastle-on-Tyne - - - St. John Street AND CO. LTD. Leeds - 5 York Place Swansea - I Grove Place W rite Glasgow - - - - 137a, St. Vincent Street PROVIDENCE MILLS' HYDE • CHESHIRE : for TYione HYDE 953 C^CTms:UN8REARABLE HYDE r full particulars August 3, 1945 E lectrical Review (Supplement) 65 B R I T A N N I C CABLES AN INDEPENDENT COMPANY, MAKERS OF E.H.T. AND L.T. PAPER MAINS CABLES, VARNISHED CAMBRIC C.T.S. M INING TRAILING, “IVBRITE” INSULATED CABLES AND THERMOPLASTIC CABLES (P.V.C. BRITANNIC ELECTRIC CABLE & CONSTRUCTION CO . LTD. IVER BUCKS Telephone: IVER « I Tele*r»m« "BRITANNIC. IVER" 66 ( Supplement) E l e c t r ic a l . R e v ie w August 3, 1 9 4 5 COPPER » BRASS WIRE • s ' " 1 P fî t » I B • I I B B t D The Solder Wire with 3 Cores of Non-corrosive Flux. % Avoids Dry Joints. ^Speedily makes Sound Joints on Dirty or Oxydised Surfaces % Always Correct Pro portions of Flux and S o ld er. 0 No additional Flux re q u ire d . % Approved by Air Ministry and G.P.O. F R E E *' Technical Notes on Soldering“ and samples sent free on request to firms engaged on Government Contracts. M U LTIC O R E SOLDERS, LTD. R. H. S Y M O JÑ-DS IA Commonwealth House, S T I t E E T London, W .C.l. Í* 9. VIC T O II I V Tel.: Chancery S171/2. W II S T i\i i s r E It . S..W .l E.R. '3« PUMPS FOR : REPYON CREOSOTE PITCH AS SUPPLIED TO ENGINEERIN PETROLEUM BOARD Pumps for C O M P A N Y À Petrol, Water, Tar, Fuel Oil, etc. Suction lifts 25ft, TENNANT STREET, without priming. BIRMINGHAM, 15, Variable stroke and Auto matically Reversible pumps. ROTOPLUNGE PUMP Co. Ltd. TELEPHONE: MID. 1792/3 58 Victoria Street, S.W.I TELEGRAMS. TON STILE Phone : VIC 4395 Grams : Rotoplung U lii m ¡9 ■ Blackheart & WiMtosihiei MALLK AfthECAST5 KCS W ELECTRICAL IMBÏI8TRY H A E M S O M & C o . (Lñm©@to) MÔRTO HYEEHAM» LIMCÔLM Telephone: North Hykeharn 206/7 Telegrams: Malleable, Lincoln August 3, 1945 E l e c t r ic a l R e v ie w (.Supplement) 67 Equip your electrically driven machines with the “ right ” control gear — IGRANIC, which will give positive protection to motor and machine and keep them working to secure maximum production. Illustration shows IGRANIC Contactor Panel for control of Travel motion of 6-ton Slab Charger for Steel Mill IGRANIC ELECTRIC C?UP BED FO RD & LON DO N 68 {Supplement) E lectrical Review August 3 , 1 9 4 5 FUSE-SWITCHES Double and Triple Pole ¡ p n g RO BU ST M ECHANISM & MALLEABLE HANDLE POSITIVE Q.M.B. SNAP ACTION H.R.C. or R«-wirable Fuses virtually stationary All contacts are mechanically pressed together by a cam. Fuses instantly replaced without tools. Top and bottom cable entry with extra large connecting space. Sole Agents; except for Midlands. Write Dept. “ E.R.” BARRIES ELECTRICAL AGENCIES Ltd. KING STREET, BRIGHTON, I, SUSSEX Telephone: Brighton 44S6 TURNING AND MACHINING PRESSPAHN.LTD. of Plastic Materiai Electrical Insulative Material Manufacturers SCREWS ln Bakelite fabric EST. 1900 Telephone : COIL FORMERS BRADFORD 5050 BO BBIN S, ETC. Telegrams A Cables : BUILT T O SPECIFICATION^ “PRESSPAHN" BRADFORD ( l o n d o n ) REGISTERED OFFICES : KESSLERS LTD. 201-203 CHURCH STREET, STOKE NEWINGTON 38 WELL ST., BRADFORD, England LONDON, N. 16 S o t c k M 'i 'k henELCO ELCO design and build soldering irons, machines, melting pots, and special furnaces for all soldering needs to suit any voltage from 24 v. up. Illustrated are four interchangeable units. There are many others. Write for leaflet to Sole Agent August 3, 1945 E l e c t r ic a l R e v ie w (Supplement) 69 THE CONCORDIA ELECTRIC WIRE & CABLE COMPANY LIMITED LONG EATON near NOTTINGHAM. 1 E-LFCTRIC TRANSFORMER C? t™ SERVES THE COUNTRY with E n d u r i n g . QUALITY EMPIRE WORKS Phone 1691-2 DEWSBURY 70 (Supplement) E l e c t r i c a l R e v ie w August 3 , 1 9 4 5 The National Fire Wastage in January was £1,894,000 PROTECT YOUR PROPERTY WITH THIS UNPARALLELED PLAN This grave loss of property—the highest since June 1942—proves once again the urgent need for the Pyrene Hire Maintenance Plan. This service not only includes the provision of the best and most suitable Fire Extinguishers, but twice a year inspection by experts, supply of spare parts, repairing, repainting and, when necessary, replacing; your staff may be trained in the proper use of fire appliances, and Certificates are issued after inspection . . . all for an inclusive annual fee. Protect your property with this unparalleled plan HIRE MAINTENANCE PLAN The Pyrene Co. Ltd., Great West Road, Brentford, Middx. T el.: Ealing 3444 PinsJaperK itsJivots BAKELITE Rivets* and small MOULDINGS Wat c klatki’ ERINOID T O A N Y TURNINGS IPfHliP" SPECIFICATION FREDERICK W. EVANS LTD. STE R NAW 0 PLASTIC WORKS 4 LICHFIELD TERRACE, RICHMOND LONG ACRE, BIRMINGHAM 7 SURREY Richmond 0222 & 4680 TELEPHONE: E A St 1286 & 1287 \ 'B A X H J m MCA DÀCIER ' 'M / C A N / m 2 2 , i Processed Part's Barrates. Sheet and 1/ Precision Caused IChristchurch, Hants. f 4 f a r 7eJep: C hristchurch, JO Il. Machined Parts / o CONDENSERS, etco E J e c tn e a J Insu/ati on Spec/a//sćs o o f all Jkinds. o August 3, 1945 E l e c t r ic a l R e v ie w (Supplement) 71 In war as in peace FOR ALL ELECTRICAL PURPOSES They are playing their part in the great National effort The Chloride Electrical Storage Co., Ltd., Clifton Junction, Manchester Telephone: Blackfriars 4731J Telegrams: Chloridic, Pendlebury London Office: Grosvenor Gardens House, Grosvenor Gardens, London, S.W. I Telephone: Victoria 2299 Under conditions that demand immediate starting and steady running FOWLER PETROL AND DIESEL ENGINES are meeting the call. In war, as in peace, Fowler Engines are playing their part driving Transmitting, Generating, Lighting and Welding Sets, also C Diesel Electric Locomotives and Cranes, etc. Petrol Engines H to 16 B.H.P. Diesel Engines 4 to 200 B.H.P. JOHN FOWLER & CO. (LEEDS) LTD., LEEDS 1C Telephone: I eeds 30731 8- ______Telegrams: “ Fowler, Leeds' 72 (Supplement) E lectrical Review August 3, 1945 ' (I 10 Jjjj TREFOLEX CUTTING COMPOUND ffl Engineers who have tested “ TREFO LEX” II Cutting Compound acclaim it as the most efficient cutting compound yet produced. “ TREFOLEX ” Cutting Com pound is a xoo% efficient lubri cant for all Hand Operated tools. TAPS, DIES, REAMERS, HACKSAWS, SLOW SPEED MACHINES. IDEAL FOR STAINLESS AND HIGH GRADE STEELS. Made in paste form, the com pound is smeared on the tool before the cutting operation begins, and as heat is generated, the compound slowly melts and feeds the cutting tool continuously, saving time, giving a better finish to the job, and definitely lengthening the life of the tool. Distributed by the THE GENERAL ELECTRIC CO. LTD. Magnet House, Kingsway, London, W.C. 2 STOCKS AT ALL G.E.C. BRANCHES August 3, 1945 g 1M m E l e c t r ica l R e v — ie w (.Supplement) 73 advertisem ents ADVERTISEMENTSï , : î r for " ; I K » Friday’s issue are a c c e n t “ i0“ ™ the followin6 REPLIES TO advertisements published under a Monday, at Dorset Houfe h ,’o s t, on c p i (Fnr Auputf irwz * btamford Street, London, ? ^ rnj).er. n,ot,to be delivered to any particular t ^ J vld^ al should be accompanied by instruc- TOF PHARfiF fl i THE CHARGE for advertisementstSSife See notice in this section E rF rT R ir\er v5;v,di!if,ss' d to the Manager of the is 2/- per line (approx. 8 words) per insertion si.ctf REVIEW. Letters of applicants in minimum 2 lines 4/-, or for display advertisements such cases cannot be returned to them. The name 30/- per inch, with a minimum of one inch. Where of an advertiser using a Box Number will not be the advertisement includes a Box Number there is disclosed All replies to Box Numbers should be an additional charge of 6d. for postage of replies. c/o ELEfTR ir »I BEvmW the advertisement, SITUATIONS WANTED. — Three insertions c r . T T REVIEW, Dorset House, Stam- under this heading can be obtained for the price of Ord.r s® u S'E1- Cheques and Postal PEVrTjii°TUik ”?ade VsyM e to ELECTRICAL two if ordered and prepaid with the first insertion. KisviJiW LTD. and crossed. Original testimonials should not be sent with applications for employment. C IT Y OF BRADFORD AUGUST IQth ISSUE Three-Phase Static Transformers Classified Advertisements for the above TT1HE Bradford Corporation invite Tenders for the issue closed for press first post on supply and delivery of : — THREE-PHASE STATIC TRANSFORMERS— FRIDAY, AUGUST 3 Contract “ C.31.” Copies of the Conditions of Contract. Specification and Form of Tender may be obtained from Mr. T. 'H. Carr. OFFICIAL NOTICES, A.M.Inst.C.E., M.I.Mech.E., M.I.E.E., Electrical En gineer and Manager, City of Bradford Electricity TENDERS, ETC. Department, 27, Bolton Road, Bradford. Tenders on the forms provided must be delivered to the undersigned not later than 10 a.m. on Wednesday, SHEFFIELD CORPORATION ELECTRICITY DEPT. the 29th August. 1945, and no tender will be received unless enclosed in a piain, sealed envelope bearing the words “ Tender for Transformers—Contract ‘ C.31,’ ” but Contract No. 705—Transformers net bearing any name or mark indicating the sender. The Contract will be let subject to the Fair Contracts TVELE Electricity Committee are prepared to receive Clauses of the Coloration, which may be seen at the tenders for the supply and delivery of the under office of the undersigned. mentioned Transformers: — The lowest or any tender will not necessarily be accepted. N. L. FLEMING. Three 1,000 kVA, 11,200/3,300 volts, 3-phase, 50 cycles. Town Hall, Bradford. Town Clerk. Contractors desiring to submit tenders may obtain 27th July, 1945 2480 specification and form of tender at this office on and after 30th July, 1945, on making a deposit of £2 2s., which sum will be refunded on receipt of a bona fide tender. SITUATIONS VACANT______To meet the convenience of contractors two copies of the specification will be furnished; additional copies may None of the vacancies for women advertised in these be purchased at a cost of £1 Is. per copy. columns relates to a woman between 18 and 40 unless such Any person or firm sending in a tender will be required wo-man (a) has living with her a child of hers under the to comply with the Standing Orders of the Council re age of 14, or (b) is registered under the Blind Persons Acts, lating to the “ Prevention of Corruption ” and to the or (c.) has a Ministry of Labour permit to allow her to standard rates of wages and proper hours and conditions obtain employment by individual effort. of labour. A print of the Standing Orders may be obtained from the Department. The tender and accompanying documents, filled up as NORTH-EASTERN ELECTRIC SUPPLY CO. LTD. directed, must be enclosed in the official envelope supplied with the specification, which shall not bear any name or mark indicating the sender, to be delivered to the Town Power Station Shift Control Engineers Clerk, Town Hall, Sheffield, 1. not later than the first post on Monday, 27th August. 1945. Tenders received PPLICATIONS are invited for positions as POWER after the time stipulated herein will not be considered. A STATION SHIFT CONTROL ENGINEERS. The The Committee do not bind themselves to accept the duties include the operation of 'High Voltage Switch lowest or any tender. boards. the control of Electrical Output, working out JOHN R. STRUTHERS, results and giving general electrical assistance in the Commercial Street, General Manager and Engineer. operation of the Station. The vacancies exist in the Sheffield, 1. 2452 Tyneside and Tees-side areas. The salary will be in accordance with Grade 10. Class G. of the National Joint Board Schedule, the commencing salary being £280 per BOROUGH OF BRIGHOUSE annum. . Experience with a manufacturer of electrical equip ment or with an electricity undertaking is essential ana Transformers, Switchgear and Equipment preference will be given to applicants holding a Technical Qualification or who can show that they are of obtaining such qualification. Suitable Shift Control RENDERS are invited for the supply and delivery of Engineers will be considered, for promotion to Technical t 300-kVA Transformers, and two sets of E.H.T. switchgear, suitable for use in substations. ASFulf^etaüs^oí practical and theoretical training, present Specifications and particulars may be obtained on employers and age should be addressed to : The Secretary. i t application to the Electrical Engineer. Huddersfield North-Eastern Electric Supply Co. Ltd. Hoad. Brighouse. G.P.O. Box No. 117. Tenders in plain sealed envelopes endorsed “ Switchgear Carliol House. Mid Transformers ” should be delivered to the under Newcastle-upon-Tyne. signed not later than the first post on Friday the 31st The Ministry of Labour and National Service Technical August, 1945. ERNEST H. CLEGG. and Scientific Register have given permisión Tnnm -rr „ Town Clerk, Control of Engagement Order. 1945. for the advertise lown Hall, 2461 ment of these vacancies. Brighouse. 74 (Supplem ent) E l e c t r ic a l R e v ie w A u g u s t 3, 1945 SHEFFIELD CORPORATION COUNTY BOROUGH OF BLA C KBU R N Electricity Department Electricity Undertaking Appointment of Deputy General Manager anti PPLICATIONS are invited for the following positions, Engineer A and preference will be given to applications received A PPLICATIONS are invited, for the position of Deputy from Chartered Electrical Engineers : — - t * - to the General Manager and Engineer at a com mencing salary of £1,100 per annum, rising to £1,400 per Deputy Electrical Engineer annum by three animal increments of £100. Applicants for this post must have had a sound tech The appointment will be subject to the provisions of nical and practical training in mechanical and electrical the Local Government Superannuation Act. '1937. and engineering and possess considerable experience in the con candidates must have previous Local Authority Service struction. maintenance and operation in all forms of public carrying a transfer value within the meaning of the Act. supply work comprising the following : — or otherwise be not more than 40 years of age. The 1. Transmission and distribution. selected candidate will be required to pass a medical 2. Modern power station work involving the operation examination. of high pressure plant. Candidates should be Corporate Members of the Insti 3. Sales development and commercial organisation. tution of Electrical Engineers, and should have had a Salary and conditions of employment in accordance with sound training in mechanical and electrical engineering. the National Joint Board Schedule, Grade 1, Class H. They should be experienced in the construction, operation present rate £852 per annum. and control of a large Electricity Supply Undertaking, and have a sound technical knowledge of both modern steam Consumers’ Engineer practice and the latest developments of electrical practice. Applicants for this post must have had experience in Applications, which must be made on the application the following branches of supply work, full details of form, copies of which may be obtained (with particulars which must be given in the application : — of the duties, terms and conditions of appointment) from 1. Showroom organisation and sales. the undersigned, must be received by the undersigned by 2. Load development (industrial and domestic). the first post on Tuesday, the 28th August. 1945. 3. Preparation of specifications and estimates for wiring, Canvassing or any communication with members of the etc. City Council, either directly or indirectly, is prohibited 4. Carrying out of installation work on consumers' and will be a disqualification. premises. This advertisement is published by permission of the Salary and conditions of employment in accordance with Ministry of Labour and National Service under the Con the National Joint Board Schedule, Grade 4, Class H, at trol of Engagement Order, 1945. present commencing at £608 per annum. JOHN HEYS, Town Hall. Town Clerk. Assistant Station Engineer Sheffield. 1. Applicants must have had a sound technical and prac 27th July, 1945. 2493 tical training and be conversant with the operation and maintenance of high pressure plant in a modern power station. COUNTY BOROUGH OF PRESTON Salary and conditions of employment in accordance with the National Joint Board Schedule, Grade 5, Class H. Electricity Undertaking present rate £564 per annum. Appointment of Power Station Electrical All the above appointments will be subject to the pro Maintenance Engineer visions of the Local Government Act, 1937, and persons appointed respectively will be required to pass a medical PPLICATIONS are invited for the position of examination. A Electrical Maintenance Engineer at the Ribble Applications, stating age and giving full particulars as Generating Station from suitably qualified engineers. above, technical training and qualifications, accompanied Candidates must have had extensive practical by copies of not more than three recent testimonials, must experience in the maintenance of th^ whole of the elec be forwarded to R. H. Harral, M.I.E.E., Engineer and trical plant and equipment of a modern Power Station Manager, Electricity Offices, Jubilee Street, Blackburn, and the person appointed will be responsible for preparing appropriately endorsed and delivered not later than Satur and maintaining a complete programme of inspection, day, August 11th, 1945. testing and repairs for such plant. The duties of the The Ministry of Labour and National Service have given post may also include the general supervision of con permission under the Control of Engagement Order. 1945, structional work by electrical plant contractors. for the advertising of the above vacancies. Applicants should preferably be Corporate Members of The Institution of Electrical Engineers. CHAS. S. ROBINSON, Town Clerk. The salary and conditions of service will be in 2444 accordance with the National Joint Board Schedule, Class “ J ,” Grade 7 (at present £509-534 per annum.). The selected candidate will be required to pass a C IT Y OF BATH medical examination and contribute to the Council's Superannuation Scheme under the provisions of the Local Appointment of City Electrical Engineer Government Superannuation Act, 1937. Applications, stating age and giving full particulars of technical qualifications, training and experience, accom E Council invite applications for the appointment panied by not more than three testimonials, are to be of City Electrical Engineer from applicants who are endorsed “ Maintenance Engineer ” and received by the Members or Associate Merrilbers of the Institution of Elec undersigned not later than Saturday. 18th August. 1945. trical Engineers and experienced in the management and administration of an Electricity Undertaking, at a salary The Ministry of Labour and National Service, A9(D), of £1.300 per annum rising by annual increments of £100 have given permission under the Control of Engagement to £1.500 per annum, plus war bonus (at present £59 16s. Order, 1945, for the advertisement of this vacancy. per annum). The salary will be reviewed after a period of G. A. ROBERTSON, M.Sc.(Tech.). 4 years’ service with the Council, and regard will be had M.I.E.E.. A.M.I.Mech.E. to all the circumstances prevailing at that time. Borough Electrical Engineer. The appointment will be subject to the provisions of the July, 1945. 2477 Local Government Superannnuation Act, 1937, and to determination by three months’ notice in writing on either side. The successful candidate will be required to pass a ELECTRICAL ENGINEER AND MANAGER medical examination. Applications (on a form to be obtained from me) must be delivered to me not later than 12 noon on the 22nd August, 1945, and must be accompanied by copies of two R E Q U IR E D for eventual service in Far East, having testimonials. Canvassing either directly or indirectly will be a dis good experience electrical contracting, cable laying, qualification. etc., capable organising and managing large contracting J. BASIL OGDEN, Guildhall. • Town Clerk. business. Reply, in first instance with full particulars of Bath. experience, to—Box 2391, c/o The Electrical Review. 20th July. 1945. 2449 August 3, 194S tL E C T R iral R ev ie w (Supplement) 75 COUNTY BOROUGH OF GRIMSBY COUNTY BOROUGH OF BLAClKBURN Appointment of Borough Electrical Engineer Electricity Undertaking A P O T I O N S are invited for the position of Engineer ¡jMng nager 0 the Corporation's Electricity Under- Appointment of Technical Superintendent Applicants must have experience in the operation of a selected generating station as well as in the adminis- * IONS are invited for the above position from tration ana management of an electricity undertaking the i>° haye had considerable experience in and must be corporate members of the Institution of Electrical Engineers or of equivalent qualification. electricity supply' undertakings. mail'tenance '* "«*■«'* The person appointed will be -required to devote the lavout Uan!!tSniSrff ° ?ave }lad exPerience in the design, whole of his time to the duties of the office. cor nor °! [P°dem power stations, and be The salary will be in accordance with the scale of the ^ t nbeirs of the Institution of Electrical National Joint Committee of Local Authorities and Chief fhp rnr,Hr^f In.sfcltution of Mechanical Engineers, Electrical Engineers (which on the present sales amounts th i National lSfn?R ^i°Y 111 beJ n accordance with CMcfeo tt Joint Board Schedule, and the salary will be to £1.649 per annum). Class H. Grade 3. at present £664 per annum, in accordance with the agreement the salary for the r a!7i6 j^PP°,rvtment will be subject to the provision of the first year will be 85% and for the second year 92£% of the Local Government Act. 1937, and the person appointed full scale salary. will lequire to pass a medical examination. The appointment will be subject to the provisions of the Applications, stating age and giving full particulars as Local Superannuation Act. 1937, and will be terminable by three months' notice given by either party. hv ilf qualifications, accompanied The successful candidate will be required to pass a be itr warded to • — 6 reeent testimonials, must medical examination. R. H. Harral. M.I.E.E., • Canvassing either directly or indirectly will be a dis Engineer and Manager. ci ualiftcation. Electricity Offices. Candidates for the appointment must, when making Jubilee Street. application, disclose in writing whether to their knowledge . Blackburn, they are related to any member of or the holder of any appropriately endorsed and delivered not later than Satur senior office under the Council. Failure to do this will day. August 18th. 1945. disqualify the candidate for the appointment. The Ministry of Labour and National Service have given Applications, stating age. education, training, qualifica permission under the Control of Engagement Order. 1945. tions. particulars of experience, present appointment and for the advertising of the above vacancy. accompanied by copies of three recent testimonials, are CHAS. S. ROBINSON. to be received by the undersigned not later than 10 a.m. Town Hall, Town Clerk. on Friday. 24th August. 1945, endorsed “ Borough Elec Blackburn. 2496 trical Engineer and Manager." L W. HEELER. Municipal Offices. Town Clerk. COUNTY BOROUGH OF H A LIF A X Grimsby. 24th July. 1945 2497 Appointment of Chief Inspector, Public Lighting Department COUNTY BOROUGH OF W EST BROMWICH PPLICATIONS are invited for the appointment of Electricity Department A CHIEF INSPECTOR in the PUBLIC LIGHTING DEPARTMENT. Senior Mains Assistant Salary £250 per annum, rising by four annual incre ments of £12 10s. to £300 per annum., plus current War PPLICATIONS are invited for the above apooint- Bonus (at present £59 16s. per annum.). A ment at a salary in accordance with the N.J.B. Applicants should have experience in the maintenance of scale, class H. Grade 6 (at present £517 per annum.). public lamps, gas and electricity supply systems. . the Candidates should have a sound technical and practical control of men and in administrative and clerical training on the installation, maintenance and operation matters. of H.T. and L.T. overhead and underground distribu The appointment will be subject to the provisions of tion systems, including the preparation of estimates and the Local Government Superannuation Act, 1937. and the changeover of supplies from D.C. to A.C. the successful candidate will be required to pass a medi Age, qualifications and details of technical and prac cal examination. tical experience should be stated in applications, Applications giving particulars of age, experience and accompanied by copies of recent testimonials, to reach position as regards National Service, accompanied bÿ the undersigned not later than Wednesday. August 15th. copies of two testimonials, and endorsed “ Chief Inspec 1945. tor. Public Lighting Department " must be delivered to The Ministry of Labour and National Service Technical the undersigned not later than 18th August. 1945. and Scientific Register have given permission under the W. USHER. Control of Engagement Order, 1945. for the advertise Town Hall. Town Clerk. ment of this vacancy. Halifax. G. O. EDWARDS. 24th July. 1945. Borough Electrical Engineer and Manager. 2472 Electric House. 296/298. High Street. West Bromwich 2464 ALTRINCHAM ELECTRIC SUPPLY LTD. SUSSEX E LE C T R IC IT Y SU P PLY COMPANY LTD. Mains Assistant Superintendent, Class A, Single-Phase Testing Dept. A PPLICATIONS are invited for the above appointment from qualified engineers experienced in :—(1) The control of workmen: (2) The laying, jointing and testing APPLICATIONS are invited for the above position. of high and low tension cables; (3) The location of faults Balary and conditions of employment will be in and (4) The general operation of a distribution system. accordance with the N.J.B. Schedule. Class C, Grade 6. Salary and conditions of employment in accordance to commence. with the N.J.B. Schedule. Class F. Grade 6. at present Applicants must have had a thorough practical and tech commencing at £459 p.a. It is a further condition of nical training in meter engineering, and should hold a employment that all employees shall become members of position of responsibility in a polyphase station. Sound the Company's Contributory Pension and Life Assurance experience in testing and maintenance of general domestic Scheme. equipment will be an advantage. Applications, stating age. details of training and ex Applications, stating age. present appointment and perience and accompanied by copies of three testimonials salary and details of qualifications and experience, should or references, must be delivered not later than 31st August. be sent in endorsed “ Meter Engineer " to the Head Office 1945 to :—R. R. H. Matthews. Engineer and Manager. of the company at “ Silver lands." 37. Alexandra Road. Altrincham Electric Supply Ltd.. 60. Stamford New Road. Altrincham. Cheshire. Epsom, Surrey The Ministry of Labour and National Service have given The Ministry of Labour and National Service has given permission under the Control of Engagements Order. 1945. ■for the S is advertisement s K L ? 1the“ W of this °v" vacancy. gement ° rder’ ^ -44ti 6 for the advertisement of this vacancy. 2502 7 6 ( Supplem ent) E l e c t r i c a l R e v ie w August 3 , 1 9 4 5 THE LANCASHIRE ELECTRIC POWER COMPANY A PPLICATIONS for an experienced Electrical Plant Engineer (Managerial) are invited by large industrial undertaking employing over 10,000 in South Midlands. Generation Department He must have extensive practical experience inthe lay out. installation and maintenance of A.C. and D.C. elec trical equipment as installed in a large industrial factory. A PPLICATIONS are invited for the position of Able to control skilled and unskilled labour. Age prefer ^ ASSISTANT CHARGE ENGINEER at Kearsley ably under 42. Applications, which must be in writing, Power Station. stating date of birth, full details of qualifications and Conditions of service and rate of pay will be in experience, salary expected, should be addressed to—Box accordance with the National Joint Board Schedule, class K. Grade 8B. 2402. c/o The Electrical Review. The Ministry of Labour and National Service A.9(D) PPLICATIONS for an experienced Mechanical Plant have given permission under the Control of Engagement A Engineer (Managerial) are invited by large industrial Order. 1945. for the advertisement of this vacancy. undertaking employing over 10,000 in South Midlands. Applications should be addressed to : — He must have extensive practical experience of the instal The Engineer—Generation Department. lation of all types of machine tools, conveyor equipment, Kearsley Power Station, compressors and general plant maintenance. Sound tech Stoneclough, near Manchester, nical education required and able to handle skilled and and must be received not later than 18th August. 1945. unskilled labour. Good prospects. Age preferably under ______2482 42. Applications, which must be in writing, stating date of birth, full details of qualifications and experience, salary FIRST GARDEN CITY LIMITED expected, should be addressed to—Box 2401, c/o The Electrical Review. OOK-keeper, used to Engineering Accounts, cost Electricity Undertaking B ing, wages, P.A.Y.E.. preparing monthly trial balance, etc., applications from those over 5J. or Class A /CONTROL Engineer required to operate modern E.H.T. ex-servicemen. State age. salary.—Box 2473. c /o The ^ and D.C. switchboard at generating station. N.J.I.C. Electrical Review. schedule (No. 9 area) rate. 2s. 4Jd. per hour; state ex / ^ TTTF.F Draughtsman. Progressive company employing perience. age. married or single, as there is an acute 1.500 requires experienced man having extensive back housing shortage in the area. ground in similar capacity with well-established firm in The Ministry of Labour and National Service have given the light mechanical electrical industries to reorganise and permission under the Control of Engagement Order. 1945. take charge of D.O., including jig and tool design. Write for the advertisement of this vacancy. details and salary required to —Box 2406. c /o The Elec CHARLES GOULD. M.I.E.E.. Works Road, Engineer and Manager. trical Review. Letchworth, Hertfordshire. 2436 H IEF Inspector required by progressive light electrical C mechanical engineering firm. S.WT. London district. Applicants must have pronounced administrative ability, ASSOCIATED MUNICIPAL ELECTRICAL ENGINEERS extensive previous experience, satisfactory electrical quali (Great Britain and Ireland) fications to recognised standards, and be thoroughly con and the versant with usual Government inspections! procedure. ELECTRICAL POWER ENGINEERS’ ASSOCIATION Write, giving full particulars and salary required, to — Box 2403, c/o The Electrical Review. NOTICE LERICAL Assistant, Class A. Ex-Serviceman, for C Stores Office. Must have thorough knowledge of ail electrical material. Apply—London Electrical Company. Bath Corporation—Appointment of City Electrical 92. Blackfriars Road, S.E.l 2324 Engineer RAUGHTSMAN required for Electrical Machines. D North Kent district. State experience and salary HPHE Standing Joint Committee of the above Associa- required. Applicants should be over 51 years of age. tions desire to point out that all applicants for the Class A ex-service men. or otherwise exempt from M.O.L. above advertised post should stipulate a salary in accord control.—Box 2383, c/o The Electrical Review. ance with Cause 10 of the Agreement made by the T^LECTRICIAN required immediately by Electrical Con- National Joint Committee of Local Authorities and Chief tractors. London, permanency to suitable man. Electrical Engineers (Electricity Supply Industry), under Class “ A ” ex-Service man or man over 51. Apply, giving which clause the latest available data (subject to any full particulars to—Box 2422, c/o The Electrical Review. adjustment which may be necessary under the interpreta tion of the Agreement) indicates a commencing salary of LECTRICIANS wanted by Central London Contrac £1.512 per annum for the first year rising to £1,778 the E tors. Class “ A ” ex-Service men only, or over 51.— third year and thereafter subject to adjustment above or Box 7383, c / o The Electrical Review. below in accordance with the National Agreement. X^LECTRICIANS wanted by Electrical Contractors in ALL ENGINEERS. WHETHER ENGAGED IN THE Warrington. Lancashire. Permanency to good men. ELECTRICITY SUPPLY INDUSTRY OR NOT. ARE Class “ A ” ex-Service men or over 51.—Box No. 2494. c/o URGENTLY REQUESTED TO INCLUDE THÉ The Electrical Review. AB'OVE CONDITION IN ANY APPLICATION MADE NGINEER required by large firm in the Manchester FOR THE APPOINTMENT REFERRED TO. E area for dealing with enquiries and orders for Electric W. ARTHUR JONES. A.M.I.E.E.. Motors. Generators, etc. Applicants over 51 or Class Secretary, “ A ” ex-Servicemen only. State age. experience and salary Standing Joint Committee. required. Box 2407. c/o The Electrical Review. A.M.E.E.—E.P.E.A. X^XPANDING London Company engaged in development 2450 -*—*‘ of new electrical instruments requires immediately executive to cO'Ordinate research and development work and small-run production prior to sub-contracting for large- Practical Designer for Lighting Fittings is scale manufacture. The position is one of considerable A required by a large Electrical Engineering Company scope, requiring knowledge of scheduling, time-planning, for the position of Production Manager. Good experience purchasing, and . calls for ability to co-ordinate the of all modern types of electric light fittings, including activities of technical personnel, but does not necessitate discharge lamps and fluorescent tubes is necessary. technical qualifications. Write full details of qualifications, Experience of design of auxiliaries would be an added advantage. Applications giving full details of training etc. to—Box 2499, c/o The Electrical Review. and experience to—Box 2411, c/o The Electrical Review. T^OREMAN required for Electrical Instrument depart- A PPLICATIONS are invited from men over 51 or Class ment. sound knowledge and practical experience with “ A ” ex-Service men only, for the post of Assistant moving coil instrument production, scaling, calibrating, Sub-station Attendant. Applicants must have experience training female labour. Permanent post with good pros in the control of High and Low Tension Switchboards, and pects. Over 51 or Class A eX-service man only.—Box 2398. in the operation of Rotary Convertor Plant. Conditions c/o The Electrical Review. of service and rates of pay in accordance with D.J.I.C. No. EAD Foreman required by company engaged on 11 Area—present rate £4 17s. 6d. per week. Applications, H essential work. S.W. London district, to take charge stating age, details of experience, and enclosing copies of of assembly shop. Applicants must have previous and two testimonials to be addressed to the undersigned not thorough experience in similar capacity with firms manu later than 11th August. 1945.—F. Swarbrick. Engineer & facturing light electromechanical equipment. Write, Manager. Hove Corporation Electricity Department. Hove giving full particulars and salary required, to—Box 2404. Street. Hove. 3. Sussex. 2491 c /o The Electrical Review. A u g u s t 3, 1945 E l e c t r ic a l R e v if w (Supplement) 77 TNVOICE Clerk (Female) Lsaiers required for electrical whole gW rrCHBOARD Attendant, experienced in operating ably with k m n v S e lf i F f Ht01« EP°d at flgures an(i prefel'- la r n î r S V? A. discounts*, etc. Permanent turhin; »u'orSi gefar’ synchronising and control of »»S ! to suitable applicant. State full ILIron and Steel Works. North particulars of cxper ¡«ice, age and wages required in con- East Coast. Salary £.330 per annum. T.U. Permanent fi^rnceto- Box r 4n4. c/o The Electrical Review. Ministry of Labour and National Service TUNIOR Engineer with technical training to degree OrXr 1 q?* P£rm+^1 0 t h e F °ntro1 of Engagement; u standard required by an Electric Supply Authority. The Electrfca) Review. lileme APPly Box 2487. c/o Experience in the design, installation and maintenance of HP ECHNICAL Assistant. Must be university graduate protective gear an advantage. Preference given to ex- electrical engineering and able to deal with the servicemen. Commencing salary £385 per annum, in I I ® arising m electric power supply. Salary £300- cluding bonus. The Ministry of Labour and National £450 per annum according to qualifications. The Ministry Service Technical and Scientific Register have given of Labour and National Service, Technical and Scientific. permission under the Control of Engagement Order. 1945. Register, have given permission under the Control of for the advertisement of this vacancy.—Box 2463. c/o Engagement Order, 1945, for the advertisement or this The Electrical Review. vacancy. Apply to—-Chief Engineer, Newcastle & District ARGE Company in North-West Area has vacancies for Electric Lighting Co. Ltd.. 81, Westgate Road. New L Senior Electrical Designers, immediately the present castle-upon-Tyne. 2455 restriction on employment is removed. Applications are ANTED, Storekeeper. Good prospects for efficient now required, and applicants should have experience in ▼ ▼ and responsible man. Must be over 51 or Class “ A ” design of* A.C. and D.C. Dynamo-Electric Machines of ex-Service man.—Box 2500. c/o The Electrical Review. all types and sizes. State age,- experience, and salary \ \ f ELL-known Electrical Engineering Company have required.—Box 2495, c/o The Electrical Review. ** vacancies for suitable lads, under 18 years of age. IFT Engineers. Old-established firm requires experi with matriculation or general school certificate, for L enced man as General Manager. Salary and partici apprenticeship in the above industry. Good rates of pay pation in « f i t s . Applications accompanied by details of and living accommodation provided.—Box 2245, c/o The experience will be considered in confidence.—Box 2456, Electrical Review. c/o The Electrical Review. YYTELL-known Firm in the Manchester District will require Engineers immediately after removal of ANAGER required to take charge of technical present restriction of employment, for handling of M development in the design and production of small enquiries or orders for Electric Motors, Generators and electric motors. Please send full details of experience and Allied Equipment. State age, experience and salary salary required.—Box 2424, c/o The Electrical Review. required.—Box 2488, c/o The Electrical Review. Y/TANAGER required, with general experience in the IREMAN wanted, London, over 51 or otherwise free manufacture of lead storage batteries. State ex Wto take position. Best conditions. Reply—Box 2344, perience and salary required.—Box 76, c/o The Elec c/o The Electrical Review. trical Review. Y \/'O R K S Manager required by leading cable jnanufac- I^ORTH East firm have executive vacancy for man with turers, London area; sound managerial qualifications initiative thoroughly experienced in designing and essential, together with experience of manufacture of constructing all domestic electrical appliances. Salary rubber and thermoplastic insulated cables; experience of commensurate with ability. Appointment will not be wire-drawing and other operations an advantage; age made until present labour restrictions are relaxed.— 35/45; first-class opportunity for the right man. Write Box 2479, c/o The Electrical Review. in confidence, stating experience and salary required, to VERSEAS Employment : Nigerian Electric Supply —Box 2458, c/o The Electrical Review. O Corporation Limited—Assistant Engineer. Applicants \\T ORKS Manager required for small Control Gear should be Grad. I.E.E. or I.Mech.E. or Members of and Switchgear Works in the North-West of Eng Association of Mining Elec. and Mech. 'Engineers, or land. Applicants should have had experience in similar equivalent qualifications. Duties will include operation manufacture and must give full particulars of age. ex and maintenance of Hydro-Electric Power Stations. perience and salary required. Address to—Box 2462, c/o Transmission Lines and Substations. Engagement for The Electrical Review. two tours of eighteen months with three months leave YYTORKS Manager wanted for a Midland Works employ- each. Free travel, free quarters, good allowances. Salary * » ing about 1,000 employees engaged in the manu £40 to £50 per month, A.T.Q. Age preferably 25—45 facture of laminations for all types of Electrical Machinery. years. Superannuation Fund maturing at age 55 years. Candidates must have a knowledge of the principles of Write quoting D.1297XA. to Ministry of Labour and design of electrical equipment, and have experience in National Service, Technical and Scientific Register, Room modern tooling and production methods, and of Works 670, York House. Kingsway. London, W.C.2. for applica management, production control, and the handling of tion form which must be returned completed by 29th labour. Apply, stating age. qualifications and when free, to—Box 2490, c/o The Electrical Review. August. 1945.’ 2466 YY70RKS Superintendent. Progressive company employ- EPRESENTATIVES wanted with a connection ▼ ▼ ing 1,500, manufacturing light electrical mechanical wholesalers and manufacturers, by North- equipment, S.W. London district, requires man with exten West firm manufacturing Rectifying Equipment and sive experience in similar capacity. Applicants must be Transformers. Replies should state area covered and competent to control labour, all grades, have thorough details of existing representations.—Box 7388. c/o The knowledge latest manufacturing methods and layout. Electrical Review. Capable of supervising large quantity production on ^ALES Manager required for well-known company with economical basis to give results. Write, giving full *3 headquarters in London to sell through the trade particulars and salary required, to-^Box 2405. c/o The Vacuum Cleaners of national reputation; other electrical Electrical Review. appliances may also, be sold later. Applicants must have had successful administrative experience and be well APPOINTMENTS FILLED known to electrical supply companies, leading electrical firms and stores. Excellent opportunity for energetic.man Dissatisfaction having been so often expressed that un successful applicants are left in ignorance of the fact that with necessary qualifications. Applicants should state age, the position applied for has been filled, may we suggest previous experience and salary required to—Box 2460, that Advertisers notify us to that effect when they have c/o The Electrical Review. arrived at a decision? We will then insert a notice free SALESWOMAN required for Electrical Contractors of charge under this heading. ^ Showroom. (Only applicants having held similar OX 7327—Engineer; Croydon Corporation—Control position need apply). Write giving full particulars, wages required, etc. W. T. Clarke & Co. Ltd., Sicilian Avenue, B Engineer Southampton Row, W.C.l. 2421. SITUATIONS WANTED SHIFT Engineer required for modern high industrial DVERTISER (2D, Higher Nat. Cert.. City & Guilds ^ power plant. Over 51 or from Class A ex-service men A Final. 5 yrs.' engineering apprentice, desires a post in only. Salary and conditions according to N.J.B. Schedule. electronics, radio or sound reproduction. Exempt military Grade 8. Class C (at present £329 p.a.). Appointment service.—Box 7337, c/o The Electrical Review. subject to passing of medical examination. Applications, DVERTISER (50). experienced in all branches sales- stating full particulars of training, experience and age, A offlce organisation, many years administrative posi to be submitted to—Personnel Manager, Boots Pure Drug tion methodical and efficient controller, seeks change.— Co. Ltd., Nottingham. 245/ Box 7382. c 7 o The Electrical Review. TRANSFORMER Assembler 10-200 kVA. Must be A SSISTANT-Engineer (27) Patentee, seeks post in A capable of complete assembly from drawings. Good Electronics or Aeronautics where initiative and new progress for efficient man in new department. Applica ideas are reouired. Good workshop, drawing office, tions only from those over 51 or Class A ex-servicemen.— sales experience—Box 7397. c/o The Electrical Review. Reply Box 2474. c/o The Electrical Review. 78 {Supplement) E l e c t r i c a l R e v ie w August 3, 1945 D U Y E R . A.M.P.O.A. Age 35. Ten yearg with GEORGE COHEN, SONS & CO. LTD. " leading firm Domestic Electrical Appliance Manu facturers; still so employed. Desires change to Com for pany engaged on similar light engineering activities. London area or South.—Box 7355. c/o The Electrical GUARANTEED ELECTRICAL Review. / "1HIEF Colliery Electrical Engineer (35). A.M.I.E.E. PLANT. etc.. works trained. D.O. experience, accustomed all types mining equipt., surface and underground, own generation or power supply, skip winding, American M O T O R S, GENERATORS. methods, etc., planning, installation, maintenance, desires executive position in colliery group, large works or as SWITCHGEAR. manufacturer’s technical representative, home or abroad.— Box 7390, c/o The Electrical Review. etc. T^LECTRICAL and Mechanical Engineer, M.Sc., expert, electrical instruments, motors, generators, also A.C. commutator machines, 16 years’ experience, seeks suitable position.—Box 7335, c/o The Electrical Review. WOOD LANE. LONDON. W.12. LECTRICAL Engineer, I.E.E., age 44, desires works Telephone: Shepherds Bush 2070 E maintenance.—H. H., Devonshire House, Wood- stock, Oxon. 7385 and T^LECTRICAL Test Engineer (27), on release from M.N., ST A N N INGLE Y, NEAR LEEDS. -L-J desires progressive post with transformer manufac Telephone: Pudsey 2241. turers or similar concern. Six years’ experience in assembling, erecting and testing all types of power and Established 1834. H.T. units. Write—Box 7324, c/o The Electrical Review. T^NGINEER, B.Sc., A.M.I.E.E., age 32, experienced in manufacture, design and development of relays, SALE control gear, motors, generators and light engineering pro ducts. Conversant with modern production practices. Will consider senior position—London area.—Box 7396. WING to recent and large purchases we can offer al c /o The Electrical Review. O extraordinary low price: Xj^XPORT. Electrical Engineer with sound mechanical. (1) D.C. MOTORS. -L ' field, office, construction and maintenance ex from £-300 h.p.. large variety in speed and perience in Great Britain. Switzerland, Chile, Brazil. voltage. British West Africa. British West Indies on Electric (2) A.C. MOTORS. Traction, Public Utility, Open and Underground Mining. single and three-phase, ranging up to 100 h.p.. Oil Field and Refinery. War Office and Air Ministry, nearly new. offers his services to manufacturers of repute who are (3) VARIOUS PLANT. desirous of opening up their export markets. Age 43. such as Generators, Convertors, Transformers. Public School, A.I.E.E., languages spoken, French. M-G sets, Switchgear of all descriptions. Spanish, Portuguese, with slight knowledge German. (4) ENGINES AND SETS. Italian.—Box 2481, c/o The Electrical Review. comprising Gas. Oil, Steam Engines and many "C^X-service man (Class A), prof. el. engineer, with wide combined A.C. and D.C. sets. experience in high and low voltage machinery and installations of all kinds, seeks appointment or part IMMEDIATE DELIVERY. nership with el. contractor or consulting engineer firm.— Box M.37, Scripps’s, South Molton st.. W .l. 7339 Please send enquiries to : T^OREMAN, Radio Production, 18 years’ experience. THE ELECTROPLANT CO. knowledge motion, time study systems, used to large Est. 1912. staff, can train new operators, desires change.—Box 7387. c/o The Electrical Review. Wembley, Middx. 2469 /TJ_PADUATE I.E.E., aged 29, captain in Royal Engi- neers, free in October, seeks technical or administra R E B U IL T MOTORS AND G EN ERATO RS tive post with prospects.—Box 7329, c/o The Electrical Review. T7"EEN young man (27), at present serving H.M. T ONG deliveries can often be avoided by purchasing -*■*- forces, seeks progressive post. Qualifications in rebuilt secondhand plant. We can redesign or replace clude City and Guilds and Higher National certificates. surplus plant of any size. Student M.I.E.E., 6 yrs.’ experience general contracting plus 6 yrs. as electrician R.A.F. Release group number. SEND US YOUR ENQUIRIES. 25.—Box 7386, c/o The Electrical Review. T > LUMBER-Jointer, married, requires situation, North- OVER 1.000 RATINGS ACTUALLY IN STOCK HERE. West Coast preferred; 10 years’ experience with supply undertaking.—Box 7379, c/o The Electrical Review. DYNAMO & MOTOR REPAIRS LTD., RODUCTION Engineer, fully conversant manufac Wembley Park, Middlesex. P ture high standards, electrical instruments and mechanisms, experimental, prototypes. Present position Telephone: Wembley 3121 (4 lines). assistant chief engineer and responsible for development eminent electrical equipment manufacturers. Release Also at Phoenix Works, Belgrave Terrace, Soho Road, granted one month’s notice, age 41. Within 20 miles Handsworth, Birmingham. London only, residing S.W. area.—Box 7389, c/o The Electrical Review. Telephone: Northern 0898. PRO FESSIO N A L Electrical Engineer, at present free, 26 seeks position. Salary £800.—Box 7371, c/o The Electrical Review. W ATER T U B E BO ILERS IN STOCK /QUALIFIED Electrical and Mechanical Engineer widely travelled, seeks executive appointment, capable or Two 25.000 lbs. evaporation, 290 lbs. W.P. ganiser. comprehensive knowledge of production and Two 25.000 lbs. .. 175 lbs. managerial duties together with consultancy on techni Three 20.000 lbs. ., 175 lbs. cal matters. Replies giving details of position and salary One 12.000 lbs. ., 200 lbs. offered.—Box 7411. c/o The Electrical Review. One 12.000 lbs. ., 1-60 lbs. One 9/10.000 lbs. .. 200 lbs. F O R S A L E _____ We install complete, including brickwork. Economisers. Pumps, Piping Valves, Generating Sets and Motors in Traders buying and. selling hereunder must observe the stock. Please send us your enquiries; we can give Restriction of Resale Order. S. R. & O. 1942 No. 958. immediate delivery. .C. and D.C. House Service Meters, all sizes, quarterly BURFORD, TAYLOR & CO. LTD., A and prepayment, reconditioned, guaranteed one year. Boiler Specialists. Middlesbrough. Repairs and recalibrations.—The Victa Electrical Co.. 47 Telephone: Middlesbrough 2622. Battersea High Street, S.W. 11. Tel. Battersea 0780. 19 August 3, 1945 E l e c t r ic a l R e v ie w (Supplement) 79 OIESEL GENERATING PLANT ELEC TR IC MOTORS AND DYNAMOS 300 c o ld R STARTto?.RI/5RETAL SIX-CYLINDER W E hold one of the largest stocks of New and Second LULL) STARTING D IESEL; new 1927 300 hand Motors. Secondhand machines are thoroughly 140-voltsi 3-phase! overhauled. Inspection and tests can be made at our 50-cycles METKO-VICK. Alternator.' Works. 280-b.h.p. PETTETi VERTICAL I-L‘YL1NDER ('<>1 I) STARTING "ATOMIC" DIESEL; new 19™. 300 r.p m. For Sale or Hire. direct coupled to 200-kW METRO VICK 400-volU 3- Send your enquiries to : — phase. 50-cycles Alternator. 250-b.h.p. RUSTON HORNSBY VERTICAL FOUR CYLINDER COLD STARTING DIESEL; new 1929 BRITANNIA MANUFACTURING CO. LTD.. direct coupled to 130-kW L.D.C. 400-volts, 3-phase, 50- 22-26. BRITANNIA WALK. cycles Alternator. CITY ROAD. LONDON, N.I. 168-b.h.p. PETTER VERTICAL 3-CYLINDER COl.l) STARTING ATOMIC DIESEL; new 1932. 400 r.p.m., Telephone: 5512-3 Clerkenwqll. 13 direct coupled to 100-kW, 220-volt D.C. Generator. 120-h.p. RUSTON VERTICAL, TWIN-CYLINDER ELECTRIC FIRE SPIRALS & COLD STARTING DIESEL; new 1930. 333 r.p.m.. direct coupled to 85-kW, 400-volts. 3-pbase, 50-cycles Alternator. HEATING ELEMENTS ■ 60-h.p. RUSTON VERTICAL 3-CYLINDER COLD 1.000-watt, 240-volt spirals. START DIESEL; new 1936. 500 r.p.m.. direct coupled £7 per gross. to 50-kW CROMPTON 250-volt D.C. Generator. 60-h.p. BLACKSTONE HORIZONTAL SINGLE Other competitive prices' on application. CYLINDER COLD START DIESEL; new 1934. 240 r.p.m.. direct coupled to 35-kW E.-C.C. 220/230-volt L).<'. MIDDLESEX ELECTRON CO. LTD., Generator. 199, High Street, Hampton Hill. 60-h.p. FIELDING & PLATT HORIZONTAL SINGLE Middx. CYLINDER COLD START DIESEL; new 1931. direct Molesey 3541. 7380 coupled to 35-kW E.C.C. 230-volt D.C. Generator. 49-h.p. CROSSLEY HORIZONTAL SINGLE-CYLIN large stock of Searchlights (sale or hire), also Winches DER COLD START DIESEL; 240 r.p.m.. new 1932. belt A of our self-sustaining type. Hundreds of thousands driving 25-kW, 400-volts, 3-phase, 50 cycles Alternator, supplied during the last 40 years to Government depart 750 r.p.m. ments. corporations and innumerable traders. Mirrors. * 37* / 42 - h.p. CROSSLEY VERTICAL SINGLE Lenses, A.I.D.Turnbuckles, etc., also surplus Carbon Rods. CYLINDER COLD START DIESEL; new 1935. 500 Ebonite and Fibre.—London Electric Firm. Croydon. 42 r.p.m.. direct coupled to 20-kW, 400-volts, 3-phase, 50- number of portable Alternating Lighting Sets, fully cycles Alternator. ^ ^ t A guaranteed, for quick delivery, l*-3 kVA, 230/1/50.— 30-h.p. RUSTON VERTICAL 3-CYLINDER ELEC The Electroplant Co., Wembley. Middlesex. 2471 TRIC START DIESEL; new 1939. 1.000 r.p.m.. direct .C. and D.C. Motors, all sizes, large stocks, fully coupled to 20-kW BULL 430/215-volt D.C. Generator A guaranteed.—Milo Engineering Works, Milo Road. (2 available). „ East Dulwich, S.E.22 (Forest Hill 4422). 6781 22-h.p. BLACKSTONE HORIZONTAL SINGLE- .C. Motors, l/5 0 th h.p. to 10 h.p., from stock. Also CYLINDER HAND STARTING DIESEL; new 1942. 600 A D.C.—The Johnson Engineering Co.. 86. Great Port r.p.m., belt driving 17.5-kW NEWTON 220-volt D.C. land Street, London, W .l. Tel. : Museum 6373. 57 Generator, 540 r.p.m. CETATE Sheet. Transparent and non-inflammable. 17-h.p. NATIONAL HORIZONTAL SINGLE-CYUN A Suitable for manufacture of Lampshades.— DER HAND STARTING DIESEL; new 1934, belt driving Collingridge & Co. Ltd. Riverside Road, Watiord. Phone. 10-kW CROMPTON 230-volt D.C. Generator. Watford 5963. 2426 9-h.p. LISTER VERTICAL SINGLE-CYLINDER ERIAL Cables, all sizes quoted for, good deliveries HAND STARTING DIESEL; new 1937, 1.000 r.p.m.. A against Government contract numbers.—Edwardes direct coupled to 4.5-kW, 110-volt D.C. Generator. Bras.. 20. Blackfriars Road, London, S.E.l. 7402 A LTERNATING Diesel Set, complete installation for 120 All the above offered in first-class condition -¿JL kVA output, 400/3/50, in first-class condition,ready complete with all accessories. for work.—The Electroplant Co., Wembley. Middx. 2470 EST English Cables, 1/.044 up to 127/.103, deliveries NEWMAN INDUSTRIES LIMITED, YATE. BRISTOL B against M.O.S. requirements.—Edwardes Bros., 20. ______2492 Blackfriars Road, London, S.E.l. 7403 /CARBONS, large stocks assorted sizes, solid and cored. METROPOLITAN BOROUGH OF HACKNEY ^ Edwardes Bros., 20. Blackfriars Road, London. S.E.l. 7404 HLORIDE Keepalite Equipment, with or without Electricity Department C battery, condition indistinguishable from new. Parti culars from—E. Powell Ltd., 39. High Street, Tunbridge rpHE Borough Council invite offers for the purchase ol Wells. 7394 -*- the machines described hereunder :— T^XHAUST Fans, new, 14". 1-phase, 200/250 v.. 1,900 cu. ft./min., £11 15s.—Southern Ignition Co. Ltd., Peebles-La Coeur Motor Converters. One 1.500 kW 190. Thornton Road. Croydon. 75 and two 500 kW, 6,000 volts. 3-phase, 50 cycles to f 'l ENERATING Sets for sale. 18 kVA. 400/3/50, petrol: 500/550 volts D.C. Stator and rotor of 1.500-kW 2*-kW. 220-v. D.C. Crude Oil Set.—Fyfe, Wilson machine require repair. 500-kW machines in run & Co. Ltd., Bishop’s Stortford. 2485 ning order. All complete with D.C. Control Panel NSU-Glass covered Plain or Enamelled Instrument and starting equipment. I Wires. No. 18 s.w.g., No. 40 s.w.g.. stock deliveries.— Also Four 1,000-kVA single-phase oil-immersed type Saxonia. Roan Works, Greenwich, S.E.10. 29 Transformers, 50 cycles, 6,070/3,460 volts. EAD-covered and Armoured Cables, P.I. and V.I.R., The above can be viewed on application to the Borough L various special lines at low prices.—Edwardes Bros.. Electrical Engineer, 18/24, Lower Clapton Road. E.5. 20, Blackfriars Road. London, S.E.l. 7405 Telephone. Amherst 2361. ESLIE Dixon & Co. for Dynamos. Motors, Switchgear. Your offer to be made by letter addressed to the Town L Chargers and Telephones.—-214, Queenstown Road. Clerk, Hackney Borough Council. Town Hall, Hacknev. Battersea. S.W.8. Telephone. MACaulay 2159. Nearest E.8. 2371 Rly. Sta. : Queen's Road. Battersea (S.R.). IS ]\TEG G ER . Evershed Vignoles. with separate generator. IyJL good condition. £12 or near offer. Phone Hop 2692 BOROUGH OF HOVE ELECTRICITY DEPARTMENT to view.—Box 2453, c/o The Electrical Review. TVTONOMARK. Permanent London address. Letters re- ItJL directed. 5s. p.a. Write—BM/M0N053. W .C.l 68 JTEM 1—One “ Tudor ” Substation Battery made TV/TOTOR Generator Sets and Convertors, all sizes and up of acid accumulators; 230 volts, 462 ampere hours IyJL voltages from 4 kW up to 500 kW in stock.— when new. , Britannia Manufacturing Co. Ltd., 2 2 / 26 . BTitanma Walk. Item 2—One Metropolitan-Vickers Motor-generator City Road, London. N.I. Telephone, Clerkenwell 5512. consisting of a 230-volts. 31-b.h.p. D.C. motor and a 5513 & 5514 90 to 111-volts. 18 0 -amperes generator; r.p.m. 1100. JVTAMEPLATES, Engraving. Diesinking. Stencils, Steel Further particulars for each or both items will be given Punches.—Stilwell & Sons Ltd., 152, Far Gosford ear y e n I Street, Coventry, 14 8 0 (Supplem ent) E l e c t r i c a l R e v ie w August 3, 1 9 4 5 NE new totally enclosed vertical Lancashire Dynamo -h.p. Petter Diesel Set, 200/220 v. A.C.; Pelapone Set. O 8-h.p. Fan Motor, for 200 v., 2-ph., 50 cys., with 5 100/140 v., 11 a., and panel; 20-kW Steam Turbo four facings, without feet, shaft 2 \" dia., 10 " long, key Sets, 120 v. D;C.; Kohler Sets, rebuilt. 5 kW. 2 kW. way 6" long, with starter complete. Ex stock. For price 220 v.; 5-h.p. Oil Engine.—E. Binns, 156a, Falsgrave apply—H. J. H. King & Co. Ltd., Engineers, Nailsworth, Road, Scarborough. 7399 Glos. 71 1 .-h.p. Blackstone Crude Oil Horizontal Engine, com- NE Parkinson Electric Motor, A.C., 35 h.p., 725 r.p.m., 7 2 plete with water-cooling tank, filter and silencer, O 3-phase, 50 cycles, 400 volts, 48 am ps.; also one and fuel tank and fuel storage tank, 5 ft. long x 3 ft. 6 ins. Westinghouse D.C. Shunt Wound Motor, 11 h.p., 460 diameter, direct coupled to a “ Bull ” Dynamo, 23 amps.. volts, 760 r.p.m. In perfect condition. Can be seen 100/160 volts, 320 r.p.m., fitted with a series/shunt running any time. Apply—W. Sykes & Sons, 74, Bond- switch. The complete unit is in a first-class condition. gate, Darlington. 2498 Best offers to—Messrs. T. S. Bell & Co., 35, Tangier HONE 98 Staines. 60-kW Allen Crude Oil Set, 220 vo. Street, Whitehaven, Cumberland. 49 P D.C.; 130-kW Diesel Set, 110 vo. D.C. (now running); 1 Oi^'h-P- “ Laurence Scott” Slipring Motor, 400/3/50. Three-throw High Pressure Pump, 3£" x 6", 700 lbs. w .p.; -IA/V/ screen protected, ball bearing, 930 r.p.m. 34-kW Steam Generating Set, 220 vo. D.C.; 20-h.p.Ruston Complete with “ Allen West ” oil immersed Starter. Oil Engine and 7/9-kW, 110-vo. Dynamo; 50-kW Steam Date 3 941.—Stewart Thomson & Sons, Fort Road. Generating Set, 440/220 vo. D.C.—Harry H. Gardam & Seaforth, Liverpool, 21, 55 Co. Ltd., Staines. 60 1 ¿^rykVA Beiliss/Crompton Alternator, 400/3/50, 4- HOTOMETER Head by Kraz (Lummer Broden type), wire. Seen running.—Stewart Thomson & Sons. P Single Stage Rotary Oil Vacuum Pump, Gaede Mer Fort Road, Seaforth, Liverpool, 21. 47 cury Pump (without mercury), 1 h.p. 230-volt Motor A.C.. 1 f^ ry h .p ., 420-volt D.C. Motor by English Electric Co.. Counter Shaft Pump Bench (incomplete), McLeod Gauge, 0ii ring bearings. 716 r.p.m., compound interpole. H.T. Coil, many H.P. Gas Burners. Small Hand Winding C.I. bedplate, 3rd pedestal bearing, pulley 21" X 21", Machine, etc.: £45 the lot, in London.—Box 7360, c/o and slide rails. “ Igranic ” floor type starter panel with The Electrical Review. volt- and ammeter. This motor is in excellent condition LATING Motor Generator Sets with 400-volt. 3-phase, and is being changed due to an A.C. supply being taken. P 50-cycles driving motors: 4 1,000 amps., 6 volts Best offers to—Messrs. T. S. Bell & Co., 35. Tangier St.. capacity; 1 3,000 amps., 6 volts; 1 3,000 amps., 10 volts; Whitehaven, Cumberland. 48 1 1,000 amps., 10 volts; 1 500 amps., 6 volts. With or OiX /V kV A Alternator, 400 volts, 3-phase, 50 cycles, 750 without switchgear.—Newman Industries Limited. Yate, revs., with direct-coupled exciter; also two 250- ORCELAIN Cleats, 2 and 3 groove, various sizes ex kW Rotary Converters, with transformers and switchgear. P stock, price list.—Edwardes Bros., 20, Blackfriars input 6,600 volts, 3-phase, 50 cycles, output 420/210 volts Road. London. S.E.l. 7406 D.C.—Midland Counties Electrical Engineering Co. Ltd.. ORCELAIN Insulators, various sizes in stock, galv. Grice Street. Spon Lane. West Bromwich. 36 P spindles.—Edwardes Bros., 20, Blackfriars Road. London. S.E.l. 7407 O A A 18" Benjamin Distributing Reflector Fittings, OTARY Converters in stock, all sizes; enquiries 200/300-watt type, perfect condition, any quan R invited.—Universal Electrical, 221, City Road. tity.—Hywood, Elect. Eng., 40, Coram St., W.C.l. 2396 London, E.C.l. 16 Electric Motors. Dynamos, Transformers, Con- SEV ER A L Telescopic Tower Ladders ready for essential verters, etc., etc., at low prices.—S. C. Bilsby. work. Extensions, Trestles and Steps to order.— A.M.I.C.E., A.M.I.E.E., Crosswells Road, Langley, near Shaftesbury Ladders Ltd.. 453. Katherine Road. E.7. Birmingham. Phone, Broadwell 1359. . 21 Grangewood 3363. 15 K A A v . Megger, Bakelite, Evershed & Vignoles. QPECIAL line, Bell and Telephone Wires, also screened 5" x 4" with case. Offers to 81, Lifstan Way, ^ wires', large quantity, cheap.—Edwardes Bros.. 20. Southend. Marine 67594. 7393 Blackfriars Road. London, S.E.l. 7408 1 /'k/Y /yam ps. Circuit Breaker, iron clad, double pole. QTAFF Time Checking and Job Costing Time Recorders fl00r mounting; also 8-way iron clad Busbar ^ (all makes) for quick cash sale. Exceptional con Unit, floor mounting, 150 amps, per way; each with dition. Write—Box 528, Smiths, 100, Fleet Street. ammeter, all modern English Electric 230-volts D.C. equip London, E.C.4. 3 1 ment. Inspection at our works. Further details from— Dynamo & Motor Repairs Ltd., Wembley Park. Middlesex. TEAM Engine for sale, twin cylinder, horizontal con Telephone, Wembley 3121. 2459 S densing type by Robey, 120 b.h.p., installed new in 1923, cost £2,000, suitable for steam pressure 50/60 lbs. sq. in. In perfect condition, may be seen running at any ARTICLES WANTED time by appointment. Engine redundant through electri fication. £200 or nearest offer for quick sale as space is urgently required. Also considerable quantity of all sizes WANTED URGENTLY leather and composition belting, new and secondhand, for ALL KINDS OF P.V.C. CABLE. sale cheap.—J. J. Williamson & Sons (Canterbury) Ltd., 2 m.m. and 3 m.m. RUBBER COVERED CABLE. St. Mildred’s Tannery. Canterbury, Kent. 2362 TWIN & TRIPLE RUBBER OR COTTON COVERED. UN-ray equipment suitable for Works Welfare REDUNDANT STOCKS PURCHASED FOR CASH. S Centre. Equipment by Watson & Sons, includes two Sun-ray Clinic Lamps, 3.500 for 200/210 volt.. A.C. and W A N D BEE & CO. LTD., two Treatment Timers, etc.—J. Sankey & Sons, Ltd., Church Walk, Albion Road, Stoke Newington, N.16. Albert Street, Bilston. 2475 CLIssold 4232. WITCH and Fuse Units, Conduits and fittings, works 7326 S requirements stocked.—Edwardes Bros., 20. Black friars Road, London, S.E.l. 7409 Q WITCHBOARDS suitable for dynamos and alternators, A CCUMULATOR Plates (old) and lead Peroxide; as ^ all sizes from 100 amp. up to 1,500 amp.—Britannia actual smelters we pay top price. . Also old storage Manufacturing Co. Ltd., 22/26, Britannia Walk, London. batteries, transformers and whole installations purchased. N.I. 25 —Elton, Levy & Co. Ltd.. 18 St. Thomas Street. S.E.l. riYHE Committee of Management, Holloway Sanatorium. Hop 2825-6. 39 -1- Virginia Water, have for disposal, due to changing p iO IL Winding Machines wanted for essential work.— over to electricity company’s supply, 1 9£" x 15" x 8" ^ Box 63. c /o The Electrical Review. Enclosed Compound Steam Engine by Peter Brotherhood "p^NAMELLED Copper Wire wanted. Please state quan- direct coupled to 60-kW Bull Compound D.C. Generator. tity. make, gauge and price.—Box 61, c /o The 110/120 volts, steam pressure 125 lbs. sq. in. The plant Electrical Review. is in good working order and can be seen on application T^NGLNEERING Technical Books (new or secondhand) to the Medical Supt. Price £300. 2476 wanted in any quantity. Attractive cash offers. Call rp H E following electricity prepayment meters are for —Third floor, 356, Oxford Street. W .l, or “ Stoneleigh," J- sale:—70 2 \ amp., 250 v., Ferranti; 12 2£ amp., St. George’s Avenue, Weybridge. 62 250 v., type B. C. & H .; 5 10 amp., 250 v.. type E. P IVTERCURY (Quicksilver) wanted. Write for packing Aron; 3 5 amp., 250 v.. A.E.G.—Slough Estates Ltd.. , instructions. Gold. Silver and Platinum also pur Trading Estate. Slough. Bucks. 2439 chased.—Collingridge & Co. Ltd.. Riverside Works, River HHRANSFORMER Lead-in Wire, 7/38 and 14/38 s.w.g., side Road, Watford (Tel. 5963). 20 -1- Insu-Glass finished, various colours, stock.—Saxonia, IX/TOTOR, 6 h.p., 230 v. D.C., 1,200 r.p.m., preferably Greenwich, S.E.10. 34 -LT-i- totally enclosed; Motor, 7 h.p. 220 v DC 2 000 rp .R .S . Cables and Flexibles, Welding Cables, supplied r.p.m.; Motor, 15 h.p., 440 v. D.C., 1,450 r.p.m., series -1- to M.O.S. requirements.—Edwardes Bros., 20. wound, crane rated. With or without control gear.—Fyfe, Blackfriars Road, London. S.E.l. 7410 Wilson & Co. Ltd., Bishop's Stortford. 2486 August 3, 1 945 E l e c t r ic a l R e v ie w ( Supplement) 81 0 ^ r f ? ^ « 2 f ner?tor<. set 110 D c - inPut 230/250 volt BUSINESS OPPORTUNITIES Self ExcitedJu& rn2iPUtoaPprox- 3 kVA- 50 periods. One h««1 npriirtc n T' « 3 kVA- 200/250 volts, single ECIPROCATING Motor (Prov. Pat.). Inventor is Retford penods-~~Geoffrey R, Burton. Grove Street. R ready to consider offers re utilisation. Box 7392. c/o The Electrical Review EELS and Drums required in fairly large quantities I by wire manufacturers. Capacity 2 lbs. to 1 cwt. AGENCIES Details to—Box 2363, c/o The Electrical Review. A GENCIES required for London, South of England, for NOTARY Converters. 50/230 D.C. input, output h to the following: (1) Domestic electrical appliances; Rc6 kVA. 230/1/50; also 3/5-kVA Transformer, ratio (2) Brass electrical accessories, switch plugs, etc.; (3) Con 100/230/1/50. — Hywood. 40. Coram Street. London. duit. Advertisers Ijave clientele with every wholesaler in W.C.l. 2397 the territory mentioned. Immediate turnover can be guaranteed. Either commission or buying basis. Post TIT ANTED. Crypton “ Constant Potential ” Battery war arrangements considered. — Box 64. c/o The Elec » » Charging Equipment, complete, 100 amp., capacity trical Review. for 12-volt batteries.—Particulars, etc., to C. S. Ltd.. A GENCIES required, South of England, including the Staffa Road. Leyton, E.10. 2468 London area: (a) Cables; (b) Small Switchgear; (c) ■\TTANTED, Megger Testing Set. 500 volt.—47. Moy Transformers; or any lines suitable for distribution for avenue. Eastbourne, Sussex. 7401 wholesalers’ business.—Box 40, c/o The Electrical Review. AX7ANTED, Rotary Converters, any size.—Universal, T^XPORT to India: An export house with well-estab- ▼ » 221, City Road, London, E.C.l. 22 lished connections in the Indian market desires to "1^7ANTED, Secondhand Kohler Plant. 1.500 w. hear from manufacturers of Electrical Accessories. House ’ ▼ reasonable, also Plating Dynamos, 500 to 2,500 amps. hold Appliances, Refrigerators, etc.. who seek to expand —Box 7398, c/o The Electrical Review. their export business. Write, giving full details, to the Empire Export & Import Company, 2, Broad Street W A N TED , 1/6-h.p., 240/1/50, 1,440-r.p.m., R.I. Place, London. E.C.2. 70 ** Motor, preferably resilient mounted for Frig.—Box 2484, c/o The Electrical Review. T ONDON Representation. Manufacturers of Trans- -U formers not represented in London and Southern YfTESTINGHOUSE Rectifier. Output 110 volts. 30 England who would like to avail themselves of an ex ** amps, approx. Input, 230 volts. 1 phase, or 400 perienced organisation (established 1907) having good volts. 3 phase. Higher Voltage Output would do.—Exeter connections with Government departments., corporations Ignition Co. Ltd. Summerland Street, Exeter, Devon. 2489 and other large buyers, and offering an opportunity for 1 1 / 2 kW Generator Set wanted. Complete with Cells, a provincial firm to establish a London office, should write -*-2 Switchboard. Preferably 110 volts. Particulars and in confidence—Box 2359, c/o The Electrical Review. price to—Edwards, “ Bridgedale.” Roxwell Road. “A/I"ANUFACTURERS’ Agents, covering the whole of Writtle, Chelmsford. 7400 Great Britain and Colonies, are desirous of contact ing manufacturers with a view to sole selling rights (either commission or buying), post-war arrangements considered. WORK WANTED AND OFFERED —Box 23, c/o The Electrical Review. ANTED, Agencies for British India, Burma, Ceylon W for A.C. and D.C. Motors. Fractional H.P. Motors, ELECTRO-PLATING Alternators, Generator Sets, Switchgear, Pumping Sets. Arc Welding Units, Power Tools, Cables, Meters, Trans XT'LECTRO-ZINC GALVANISING TO A.I.D. SPECI formers. Convertors, Fans (Table, Exhaust and Ceiling). AL FICATIONS. END OF GOVERNMENT CONTRACT A.C. and D.C. Cinema Carbons and Sound Equipments WORK. for theatres. Radios, Lamps. Fittings, with all accessories, Enquiries Invited. by a well-organised firm, throughout above areas. Five offices, with sub-agents in all towns. Sound business E.M.E. CO. guaranteed. Apply Havells Electrical Sales Corpn., 59. 19 St. Catherines Road. Forbes Street, Fort, Bombay, with prices, catalogues and Works: Fisherman’s Quay. Littlehampton, Sussex. terms. 2188 7391 /CAPACITY available for Mech., Elect., Radio assys, MISCELLANEOUS ^ large or small, simple or intricate, repairs, modifica HOTOGRAPHY. a photograph says more than a tions, full manufacturing, technical facilities. Competitive. P thousand words. Realistic photographs for catalogues, —Mec-Electric Ltd., 95/7, High St., Chatham, Kent. 7359 brochures and general reproduction purposes. All branches RAUGHTSMAN seeks Contracts for design of Small of photographic work undertaken. Records made of present work, premises, etc.—Miles & Kaye Ltd., Industrial Photo D Press Tools, Jigs, etc. Fully Experienced.—'Box graphers, 100, Southampton Row, London. W.C.l. Tele 7395, c/o The Electrical Review. phone, HOLborn 6858. Established over 50 years. 2451 'C'NGINEERS, North Country, seek orders for production ■U high-grade components, units or complete assemblies sueh as machines, engines, pumps, control gear, winches or special purpose machines for processing, etc. Organisation EDUCATIONAL NOTICES includes fully equipped Drawing and Planning offices.— Box 2425, c/o The Electrical Review. Great Possibilities for l\/rACHINING Work, for Centre Lathes up to 6§ in. TECHNICALLY QUALIFIED ENGINEERS -LT-1- centres and medium-sized miffing (good grade work preferred).—The London Electric Firm, Croydon. Up lands 4871. 56 Key Men in War-Time and Afterward* OMALL Armatures, etc., winding or re-winding, in ^ quantity. High-class work, prompt delivery.— rp H E finest posts and the great majority of posts in Southern Ignition Co. Ltd.. 190, Thornton Road, Croy Great Britain in this war are technical. The same don. 59 will be the case when the war is over. The vast increase in mechanisation now being applied to war purposes will QJMALL Firm Instrument Makers (London) are in a then be suitably utilised in reconstruction, and in trade position to undertake work to Customers’ own draw and commerce. Take a recognised Engineering Quali ings or patterns.—Box 7378, c/o The Electrical Review. fication through home-study with the T.I.G.B., whose ^TRANSFORMERS, single and three-phase. All types Students have gained 35 FIRST PLACES in the 1 up to 10 kVA.—Woden Transformer Co. (Phone. A.M.Inst.C.E., A.M.I.E.E., A.M.I.Mech.E., A.F.R.Ae.S.. Bilston 41959), Moxley Road. Bilston, Staffs. 11 etc., examinations. Write to-day for “ The Engineer’s Guide to Success,” containing the world’s widest choice Y/TTREOUS enamelling capacity available shortly. All of engineering Courses—over 200—covering all branches : v interested firms write—Box 2478, c/o The Electrical Electrical, Aeronautical. Mechanical, Wireless, etc. Review. YAT’ELDING capacity, 300 hrs/wk. available on pre- cision controlled resistance welders, projection and THE TECHNOLOGICAL INSTITUTE OF spot, for light alloy and steel components, assemblies and GT. BRITAIN sheets up to 24" wide, thickness 2 by —Box No. 89. C. R. C., 29, Hertford St.. W .l. 2429 35. Temple Bar House, London, E.C.4. 77 8^. (Supplement) Electrical Review August 3 , 1 9 4 5 EDUCATIONAL NOTICES —Continued COMPANY MEETINGS LATEST A.M.I.E.E. RESULTS BROADCAST RELAY SERVICE ÏN the recent Examinations held by the Institution of Steady Progress and Encouraging Prospects • i rfVl^'Vn Eng>neers 477 Candidates sat who had taken B.L.E.1. courses. Of these 457 were successful in passing the examinations. We believe this record of 457 rp H E 17th Annual General Meeting of Broadcast Relay successes out of 477 entrants has never before been Service Ltd, was held on July 31st in London. approached by any oral or correspondence tutorial organisation, and indicates the very high efficiency of Mr. Allan Miller (Chairman & Joint Managing Director) the modern system of Technical training which we have said that the balance of trading account amounted to laid down. £135.439, approximately the same as last year. Provision had been made for the dividend on the Preference shares The B.I.E.T. tutorial organisation is waiting to assist now redeemed, the interim dividend on the Ordinary you either with a short specialist course or complete stock and the proposed final dividend on this stock at training for a recognised examination. the same rate as last year. We have available a large full-time staff of instructors, He was pleased to ¿state that Mr. F. P. Bishop had while the efficiency of our extensive organisation is a joined the company ¿s Joint Managing Director. Mr. byword among engineers. Bishop had been concerned with the management of one of our greatest newspapers for many years and brought to the management an experience which would be of WE GUARANTEE—" NO PASS—NO FEE " inestimable value to the company. The steady progress maintained throughout the under May we send a copy of " ENGINEERING OPPOR TUNITIES ” ? Containing a great deal of useful advice taking was a cause of satisfaction, and he was glad to be and detailed information on over 200 Home-Study Courses able to add that the prospects of future development and examinations, this handbook is of very real value to appeared equally encouraging. the ambitious engineer. Referring to the war service of their companies, the Chairman said that their manufactures include equipment Our highly informative handbook will be sent FREE for communication and navigational purposes, apparatus and without obligation on request. used in conjunction with the development of large bombs and devices for anti-submarine warfare. A large variety of other equipment was made by the company, such as BRITISH INSTITUTE OF ENGINEERING specialised types of motors and generators for use on land, sea and in the air, also synthetic air training equip TECHNOLOGY. ment for aircraft crews. As a typical example he was Established 1927—over 200,000 students. now permitted to disclose the rediffusion trainer. This was a device by which bomber crews were trained on the 12. Shakespeare House. 17. 18. & 19. Stratford Place. ground to deal with all conditions they had to meet in Oxford Street. London. W.1. operational flights. This apparatus was a striking in 33 stance of the successful application of rediffusion tech nique to an urgent practical war problem, and no doubt had been the means of saving many gallant lives, con serving aircraft and petrol, and speeding up the training. REPETITION TURNING The company had a comprehensive programme of de signs on hand for peace-time production which would employ a substantial part of their manufacturing facili Accuracy and ties. A department had been established for industrial radio heating apparatus, and their equipment was meet Good Finish ing with widespread acceptance for industrial processes. The rediffusion services operated by ther subsidiary in companies in 35 towns had been maintained throughout the war. despite the fact that many of their towns had been subjected to the heaviest bombing. Their industrial Free Turning communications service operated by their ’ subsidiary. Central Rediffusion Services Ltd., performed a valuable Metals task in equipping factories for “ Music while you Work.” They had conducted extensive research on this subject and many factories had been equipped with their system. and When properly done “ Music while you Work ” was an important aid to certain types of production, and it was Plastic Rod much appreciated by workpeople in factories. They believed that this type of service would continue to expand in the future. Referring to business projects, the Chairman said that the company maintained a research staff who were con stantly seeking to discover ways and means to improve the service. They had made considerable technical ad LEWIS WOOLF vances under the spur of war. which had enabled them LIMITED not only to improve the quality of the service, but also to achieve important economies in working. They were 144 OAKFIELD RD. planning to give their subscribers a choice of three alterna tive programme circuits instead of two, and they hoped in spite of continuing difficulties in manpower and equip BIRMINGHAM 29 ment that the necessary installations would be completed within a short time after the third programme promised by the B.B.C. had come into operation. Meanwhile there was ample scope for expansion, not only in many of the areas they already served, but also in new areas at home and overseas. Despite the fact that anything in the nature of sales effort had neces sarily been at a minimum, the number of subscribers was growing steadily. The demand for rediffusion service came from many quarters and they were preparing them selves to meet that demand. The revort was adovted and the payment of a final dividend of 3£%, making 7%. free of tax, for the year on the ordinary stock was approved. 2501 August 3 , 1 9 4 5 E l e c t r i c a l R e v ie w {Supplement) 8 3 “At the third stroke it Mr ill h e ” Hpinprnber ihp golden voicr o f " TIM bpforp the xvar ! In those days thorp was no need to guess the time, one only had to dial ' T I M." And today there is no need for guess-work in heating when tin Western m ic rq sta t will automatically control heat with the precision and leliability that one used to associate with the words " A t the third stroke it will be precisely . The Mark 1 model trill handle 5 amps at 250v on a range of 60/120 degrees with a differential of .1 degree. hiù H ufaćti/Jied( h/ LAWRENCE G. WESTERN (INCUBATORS) LTD — E HANNINGFIELD. CHELMSFORD WITH CONTINUOUS-BALANCE PRINCIPLE The Brown electronic potentio- metric pyrometer is a self-balancing instrument for indicating, recording or controlling temperatures. It employs a conventional null- balance potentiometer-type measur ing circuit, but its re-balancing system is in continuous balance, and vibration has no effect on its simple and robust mechanism. In fact, it brings to industry an advanced and practical application ELECTRIC of electronics. •TRUCKS These instruments are not immedi ately available, but their advantages •TRACTORS are well worth noting for the time, perhaps in the very near future, • LOCOMOTIVES when we hope to be able to offer conserve man-power them. WINGROVE & ROGERS LIMITED HONEYWELL - BROWN LTD BROADWAY COURT, BROADWAY, LONDON, S.W.l Gfl 84 ( Supplement ) E l e c t r i c a l R e v ie w August 3. 1945 PAGE Dynamo & Motor Repairs Ltd 58 Index to Advertisers Dyson & Co. Enfield (1919) L td 67 PAGE Easco Electrical...... 62 Acorn Machine Tool Co. (1936) Ltd...... 84 Aerialite Ltd...... Elcordia Ltd...... 68 . . . . 14 Electricity Services...... 86 Agro Electrical Co. Ltd...... 44 Armorduct Cable Co. Ltd...... Electro Dynamic Construction Co. Ltd...... 3 Cover iii Electro Methods Ltd...... 85 Association of Steel Conduit Manufacturers .... 16 Elliott Bros. (London) Ltd...... 49 Barries Electrical Agencies Ltd...... 68 English Electric Co. Ltd...... 15 B.E.N. Patents Ltd...... 86 Ensel Electric Co. Ltd...... 60 Berger, Lewis, & Sons Ltd...... 57 Evans, F. W., Ltd...... 70 Berry's Electric Ltd...... 40 Bill Switchgear Ltd...... 3 Ferranti Ltd...... II Birkbys Ltd...... 87 Fowler. John. & Co. (Leeds) Ltd...... 71 Bolton, Thomas, & Sons Ltd...... 47 General Electric Co. Ltd...... 10 & 72 Bowker, S. O., Ltd...... 20 Godwin. H. J., Ltd...... 28 Britannic Electric Cable «Sc Construction Co. Ltd 65 British Insulated Callender's Cables Ltd...... 18 Hall, John, (Tools) Ltd...... 60 British Thomson-Houston Co. Ltd Cover iv «Sc 5 Harrison & Co. (Lincoln)...... 66 Brook Motors Ltd...... 21 Heatrae Ltd...... I Brookhirst Switchgear Ltd...... 34 Heayberd, F. C., & Co. Ltd...... 43 Bruce Peebles & Co. Ltd...... 2 Helios Laboratories...... 54 Brush Electrical Engineering Co. Ltd...... 31 Henley's, W. T., Telegraph Works Co. Ltd 13 & 39 Heyes <& Co. Ltd...... 54 Bulpitt & Sons Ltd Cover iii Honeywell-Brown Ltd...... 83 Canning, W., «Sc Co. Ltd...... 51 Hotric Ltd...... 85 Castle Fuse & Engineering Co. Ltd...... 88 Chloride Electrical Storage Co. Ltd...... 71 Igranie Electric Co. Ltd...... 67 Clarke, H., «Sc Co. (Manchester) Ltd...... 58 lmhof, Alfred, Ltd...... 8 Concordia Electric Wire & Cable Co. Ltd...... 69 Ingram, Kemp &. Joyner...... 44 Consolidated Pneumatic Tool Co. Ltd...... 7 Ismay, John, & Son Ltd...... 28 Crompton Parkinson Ltd Cover ii, 29 & 53 Johnson, Richard, Clapham & Morris Ltd...... 64 Cryselco Ltd...... 30 Johnson & Phillips Ltd...... 33 Dacier L td...... 70 Keighley Lifts Ltd...... 54 Daly (Condensers) Ltd...... 28 Kenyon, William, & Sons Ltd...... 62 De la Rue Plastics Ltd...... 35 Kesslers (London) Ltd...... 68 Dennis, G. P., Ltd...... 28 Kimber, B., Allen & C o...... 68 Donovan Electrical Co. Ltd...... 88 Kodak Ltd...... 25 Dover Engineering Works Ltd...... 52 Drake & Gorham Wholesale Ltd...... 8 (Continued on page 86) SOLDERING IRONS • R O B U S T CONTROLLED HEAT • EFFICIENT • INTERCHANGEABLE BITS Visual Temperature Indicator if required (Patent No. 566512) BIT OR ELEMENT CHANGED IN A FEW MINUTES. LOW VOLTAGES Write for particulars to Sole Agents for ACORN MACHINE TOOL CO. (1936) LTD. Telephone : Great Britain ______WESTBURY, BRACKLEY, NORTHANTS FINMERE 201 & 205 August 3, 1945 E l e c t r ic a l R e v ie w (Supplement) 85 STREET ■ LONDON ■ N Wj 4 RELAYS with Mercury and Metal Contacts 2 vl IS ASSURED WITH A TEMPERATURE LATEX SLEEVE HUMIDITY CONTROL Distinctive colour aids identification. PRESSURE Structure ensures closer binding, proof against moisture and corrosion. Latex sleeves stretch ten-fold without splitting thus speeding up output. SOLENOIDS A BRILLIANT S T A R T 24 hour service, for urgent specially BI-METAL THERMOSTATS printed sleeves t PRECISION RESISTORS • CABLE MARKERS AND SLEEVES EARTH PROTECTION E. SIEGRIST LTD., 39 Berners St., W.t. Tel.: Mus, 0032 Your enquiries invited for early deliveries of Thermal Storage Heaters in following capacities. I | gallons, 3 gallons and 20gallons“Two in One.” Also Immersion Heaters (I, 2 or 3 k.w.) for con v e rtin g existing H o t Water Systems. HOTRIC LIMITED Head Office: 198 ForeSt., Edmonton, N.I8 Telephone: Tottenham 1321 Works: London, Bishops Slortford and Edinburgh Sew ÍNSULATI0N CO. LTD., GLOUCESTER 8 6 ( Supplem ent) E l e c t r i c a l R e v ie w August 3, 1 9 4 5 PAG M Index to Advertisers Ross Courtney & Co. Ltd...... I Rotoplunge Pump Co. Ltd...... 66 (Continued from page 84) Rowlands Electrical Accessories Ltd...... 45 Lancomotors Ltd...... 52 Runbaken Electrical Products...... 86 Londex Ltd...... 88 Sangamo Weston Ltd...... 40 London Electric Wire Co. & Smiths Ltd...... 36 Sankey, Joseph, & Sons Ltd...... 4 Low, Archibald, Electrics Ltd...... 58 Siegrist, E., Ltd...... 85 Mallory Metallurgical Products Ltd...... 43 Siemens Electric Lamps & Supplies Ltd ...... 25 Manganese Bronze & Brass Co. Ltd...... 59 Simplex Electric Co. Ltd...... 12 Martindale Electric Co. Ltd...... 41 Spicers Ltd...... Cover iii Mather & Platt Ltd...... _ 23 Statter, J. G., & Co. Ltd...... 32 McKechnie Bros. Ltd...... 60 Sternaw Co. Ltd...... 70 M.C.L. & Repetition Ltd...... I St. Helens Cable & Rubber Co. Ltd...... 38 Medway Corrugated Paper Co. Ltd...... 61 Sunvic Controls Ltd...... 48 Mercury Switch Manufacturing Co. Ltd...... 64 Symonds, R. H., Ltd...... 66 Metallic Seamless Tube Co. Ltd...... 64 Thomas, Richard, & Baldwins Ltd...... 19 Metropolitan-Vickers Electrical Co. Ltd 17 & 26 Midland Dynamo Co. Ltd...... 44 Thorn Electrical Industries Ltd...... 56 Midland Electric Manufacturing Co. Ltd...... Cover i T. M. C.-Harwell (Sales) Ltd...... 44 Moulded Products Ltd...... 65 Tonks, H., & Co...... 63 Mullard Wireless Service Co. Ltd...... 52 Tungstalite Ltd...... 84 Multicore Solders Ltd...... 66 Uhlhorn Bros. Ltd...... 46 New Insulation Co. Ltd...... 85 United Ebonite & Lorival Ltd...... 46 Newalls Insulation Co. Ltd...... 50 Vandervelde, L...... 86 Nife Batteries Ltd...... 55 Veritys Ltd...... 41 Normand Electrical Co. Ltd...... 37 V. G. Manufacturing Co. Ltd...... 62 Painton & Co. Ltd...... ' ...... 50 Ward, Chas. F...... 88 Pirelli-General Cable Works Ltd...... 6 Ward & Goldstone Ltd...... 42 Pressed Steel Co. Ltd...... 27 Wego Condenser Co. Ltd...... 88 Presspahn Ltd...... 68 Wells, A. C., & Co. Ltd...... 64 Pritchett & Gold & E.P.S. Co. Ltd...... 2 Western, Lawrence G., (Incubators) Ltd...... 83 Pyrene Co. Ltd...... 70 Westinghouse Brake & Signal Co. Ltd...... 9 Radio Instruments Ltd...... 50 Westminster Engineering Co. Ltd...... 1 Rands & Co. Ltd...... 48 Wiggin, Henry, & Co. Ltd...... 48 Repton Engineering Co...... 66 Wingrove & Rogers Ltd...... 83 Revo Electric Co. Ltd...... 22 Woolf, Lewis, Ltd...... 82 Reyrolle, A., & Co. Ltd...... 24 Wright, Bindley & Gell Ltd...... 27 Robinson, Lionel, & Co. Ltd...... 46 Yorkshire Electric Transformer Co. Ltd...... 69 INVISAFLEX INDUSTRIAL LOCAL L IG H T IN G UNITS PORTABLE FLASH TEST ^fcl-E ENCL0St/J BmcA.tacM orunioersaA ^flou G H O ^ concCcut6 ELECTRICITY SERVICES LTD.. 86 CANNON ST.,E.C.4 Gauged Processed L to all shapes, sizes and w m m i requirements. Gnome Works, N VARNISHED Stansted.Essex./ INSULATING SLEEVING TELEPe-TELEG?: B E N PATENTS L T D .. HIGH W YCO M BE STANSTED 326/ August 3, 1 945 E l e c t r ic a l R e v ie w ( Supplement) 8 7 ost . v / a r To realise one’s limitations.«« when one has enthusiasm is often difficult—particularly if, having pioneered new paths and, after arduous effort, one has found success. We at Birkbys have phenolic plastics—materials of 1,000 uses—to enthuse over; we are also pioneers in plastics, yet we are happy at having shared in telling the world what plastics CANNOT do. Strings of superlatives have been used about plastics by sensationalist journalism but, we hope, the possibilities of plastics—the real virtues of ELO—have not been obscured. You just can’t build a world of ELO, but you can base post-war production on a sound use of this m a te ria l...... why not get to know more about it ? Mouldings, Powders, Resin and Varnish For everything electrical and I 001 other uses e /yto/ieet Write NOW for information fo T H E RESEARCH SECTION, BIRKBYS LTD.. LIVERSEDGE.YORKS. 8 8 (Supplement) E l e c t r i c a l R e v ie w August 3, 1945 -Immediate Deliveries /■ “ Triumph ” Fuses are in stock, EARTHING CLIPS for Switchboard and Busbar WITH SPECIA L Mounting, in all ratings from 5 amps, ‘250 volts to 350 amps. BITE AND CRIP 500 volts. INTO TUBE OR Prompt deliveries of all types of Distribution Boards, including ARMOURING H.R.C. The only Rewirable H.O. Fuse Note the tongue which incorporating both pressure self ensures perfect and aligning contacts and vented perm anent contact. Easy explosion chamber in base. to fix. Nuts cannot Sole Patentees and Manufacturers :— turn. All sizes from half to two inches The Castle Fuse & Engineering Co. Limited THE DONOVAN ELECTRICAL CO. LTD. Castle Works, 31/35 Chester Street, Liverpool 8 . Phone : Royal 1610. G ram s : “ Corundum, Liverpool ” BIRMINGHAM 9 Electrical Manufacturers and Stockholders REMOTE C O N T R O L O F STR EE T LIGHTING MASTSR sw/rctf. p/Lor W/RE. BArrfRY, This si mple arrange m ent in wide use Petrol Electric Generating Plants, H.T. Generators, D.C. Ask for leaflet Motors, Frequency Changers, 104/ER etc., up to 25 K.V.A. CHAS. F. WARD, 37 w hite post lane L 0 N D EX'- I T D MANUFACTURERS OF RELAYS Phone : Amherst . HACKNEY WICK, E.9 1393 Ay*ORK5Y 20TANERLEY ROAD- L0ND0NS-E -20 syc Printed in Great Britain at T h e Ch a pel R tver P r e s s, Andover, Hants, and published by E l e ctr ic a l R e v ie w , L im it e d , at Dorset House, Stamford Street, London, S.E.l. August 3, 1945 E l e c t r ic a l R e v ie w iii ( REG'D) 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 Production But not now Restricted ALUMINIUM DOMESTIC WARE & ELECTRICAL APPLIANCES IV August 3, 194 5 ,r i The Big Name in Industrial Lighting W LAMPS I A M PS The British Thomson-Houston Co. Ltd. Crown House, Aldwych, London, W.C.2