LIME FOR THE LAND
Vol. C XXXVII. No. 3548 NOVEMBER 23, 1945 9d. W EEKLY
THE ENGLISH ELECTRIC COMPANY LIMITED London Office: QUEEN'S HOUSE, KINGSWAY, LONDON, W.C.2 INDUSTRIAL MOTOR WORKS BRADFORD E l e c tr ic a l R eview Novem ber 23, 1945 Q nwatclù a^tet i/ictoty
JSJOW the National effort has been crowned with overwhelming success in WAR production British factories must swing bac to no less intensive production for the rt habilitation of the Nation and the World. Electrical cables, essential for war, are ro less essential for the arts of PEACE, and the lessons learned in war call urgently for devel opment and application by the best brains in
Reęd. T ra d « M m rk the Industry. N ot. 56«, 586-8-7 "X Users of C.M.A. Cables MEMBERS OF THE C.M .A . can rest assured that they
The Anchor Cabl^ The India Rubber, are served by unsurpassed C o . L td . G utta-Percha&Tele graph W orks Co. Ltd. British Insulated (TheSilvertown Co.) Cables Ltd. products of Research and Liverpool Electric Callender’s Cable & Cable Co. Ltd. Construction Co. Engineering. L td . The London Electric W i r e C o . a n d S m ith s Connollys (Blackley) L td . L td . The Macintosh The Craigpark Elec Cable Co. Ltd. tric Cable Co. Ltd. The M etropolitan CromptonParkinson Electric Cable & vfye a n d u l e Ltd. (Derby Cables Construction Co. L td .) L td . Enfield Cables Ltd. Pirelli-G eneral Cable W orks Ltd. Edison Swan Cables (General Electric L td . C o . L td .) W . T. Glover & Co. St. Helens Cable & L td . Rubber Co. Ltd. G r e e n g a te & I r w e ll Siemens Brothers & Rubber Co. Ltd. Co. Ltd. (Siemens Electric Lamps and W . T. Henley's CMA. Telegraph W orks Supplies Ltd.) C o . L td . S ta n d a rd T e le p h o n e s & Cables Ltd J o h n s o n & P h illip s L td Union CableCo.Ltd. CABLES
Advt. of the Cable Makers' Association, High Holborn House, 52-54 High Hoiborn, W.C.I. Holborn 7633 ï
November 23, 1945 E lectrical Review the value of m@w ideas
Many years ago—the whole of the Panama Canal Scheme was held up by mosquitoes. It could not proceed until a way was found to protect workers from malaria—caused by these pests. In the past, Electric W ater Heaters have suffered from bugs and bugbears in the matter of furring up and re-tinning. The use of Monel as the metal of construction of Heatrae Water Heaters makes it more easy to overcome these troubles. leaders in elechic wafer healers HEATRAE LTD., NORWICH . PHONE : NORWICH 25131 . GRAMS : HEATRAE, NORWICH
IS IT ALIVE? TAG TERMINALS PHASING RODS VACUUM TUBE to locate interconnections DETECTORS between two A.C. systems Range 6,600 to 35,000 V.
FOR W IRELESS AND S IM IL A R A WIDE RANOE OF CONNECTIONS SIZE8 IN 8TOCK RDSSCOURTNEY&Co.Ltd. ASHBROOK ROAD, LONDON, N.I9
LINKS
Sole M a k e rs o f :— "WESTMINSTER” PATENT No Earth VACUUM TUBE DETECTORS Connection " PARTRIDGE ” DETECTORS J required EARTHING RODS
The WESTMINSTER ENG. Co. L .d M CI and RE PETITION LTD. V ictoria Road, W lllesden Junction, N. W.IO P o o l L an« , L an g le ij , B iem lnjls am. Telephone : Telegrams : Elgar 7372 (2 lines). “ Regency, Phone, London.” 2 t.LECTRICAL REVIEW Novem ber 23, 1945 November 23, 1945 Electrical Review 3 t-And still the world*s nerve centre
Verschnier's painting of the Fire of London, reproduced here by permission of Rischgitz Studios.
N 1666 London was devastated by accidental fire; and once again, in I1940, through enemy action, fire wrought destruction in the St. Paul’s and Cheapside area, where, in Wood Street, stands one of the largest Automatic Exchanges, a nerve-centre of London’s telephone communi cations, and thus of the whole world. The fine new building suffered in the attack, but the Exchange now functions with unimpaired efficiency. No finer tribute could be paid to Alton quality and reliability than is done by the fact that two Alton batteries form part of this great engineering achievement. ALTON BATTERIES OF MERIT THE ALTON BATTERY COMPANY LTD., ALTON, HANTS Sole Suppliers of Fuller Stationary Batteries Telephone : Alton 2267 and 2268 Telegrams: ‘ Battery, Alton ’
A13/45 E le c t r ic a l R e v iew November 23, 1945
.....1
FOR
WOVEN GLASS
ELECTRICAL
in s u l a t io n
It isn’t surprising that the Micanite
& Insulators people are having to
supply more and more Empire Cloths
W and Tapes made from woven glass. Woven
glass provides an insulating material of great
durability which doesn’t give a chance to Messrs. Volt and Amp and Mr. and Mrs. W att even when things get hotted up much more than usual. Apart from woven glass, we make Empire Tapes and Cloths from a number of other materials, so that people who must keep electricity in its place can be sure of getting
exactly the right material for every particular purpose.
a n d i THE MiCANITE & INSULATORS CO. LTD. EMPIRE WORKS, BLACKHORSE LANE, LONDON, E. 17
Makers of MICANITE (Built-up Mica Insulation). Fabricated and Processed MICA. PAXOLIN (Synthetic-resin laminated sheets, rods, tubes and cylinders). High-voltage Bushings and Terminals for indoor and outdoor use. Empire Varnished Insulating Cloths and Tapes and all other forms of Electrical Insulation. Suppliers of Vulcanised Fibre, Leatheroid, Presspahn, etc. Distributors of Micoflex-Duratube Sleevings, MicofJex- Durasleeve (plastic covered flexible metal conduit) and Kenutuf Injection Mouldings (P.V.C.) November 23, 1945 E lec tr ic a l R eview 5
to tls to st THE ELECTRICAL CIRCUIT It The BTH Company has, during; the past 50 years, borne a predom inant reputation for the quality and reliability of its products, and has contri buted m aterially to the progressive efficiency and productiveness of British I n d u s t r y .
A large proportion of the electrical equipm ent used in industry is made in the BTH Works, and includes turbo-alternators; generators, including heavy electrolytic generators; sw itchgear; transform ers; rectifiers; m ining and rolling m ill m achinery; every kind of m otor and control gear, including electronic and am plidyne control; Mazda lamps, Mazda Fluorescent lamps, and Mazdalux lighting equipment.
BTH has also contributed a generous quota to the efficiency of the aeroplane and especially to the development of Air Commodore W hittle’s
r r - D 'T' 1 1 i ■t S l n THE BRITISH TH0MS0N-H0UST0N COMPANY LIMITED. RUCBY. ENGLAND. A3553 6 E l e c t r ic a l R e v ie w November 23, 1945
OILITE’ APPLICATIONS IN THE ELECTRICAL FIELD O I LITE SELF-LUBRICATING BRONZE BEARINGS
* Oilitc * is in service on Electrical Equipment rotating at over 20,000 R.P.M. and is approved fof 3,000 lbs. per sq. in. pressure when limited motion is involved. Sufficient lubricant is impregnated in the cellular structure o f ‘Oilitc’ 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 ease of assembly.
THE MANGANESE BRONZE & BRASS CO. LTD HANDFORD WORKS, IPSW ICH tilephonmpswich 2 1 2 7 t e l e c r a m s " b r o n z e i p s w i c w " November 23, 1945 E lec tr ic a l R eview 7
¡ 4 * ^ ^ w j| f
ij e j
Post free booklet U1494 gives full details of Sturtevant Electrostatic Precipitation Sturtevant Engineering Co. Ltd. 2 5 W orcester Rd., Sutton, Surrey E le c t r ic a l R e v ie w Novem ber 23, 1945
There are many situations in The Benjamin Glassteel Diffuser which a moderate degree of consists of a Crysteel porcelain diffusion is required in the lighting, enamelled reflector with an opal either to provide a suitable degree glass diffusing globe fitted inside of visibility in complex objects it so that the lamp itself is not where the light has to penetrate directly visible. There are aper beyond obstructions, or to show tures in the reflector which allow up surface details, or to avoid a limited proportion of the light indirect glare. There are also to pass upwards to relieve dark occasions when lamps up to 500 ness overhead. They are available watt have to be used, and for these with the Saaflux system of con purposes the Glassteel Diffuser struction for lamps up to 500 w. provides an excellent medium. or 250 w. E.D.
Benjamin Illuminating Engineering Service will advise you on your lighting problems BEN7AMJN The Benjamin Electric Ltd., Brantwood Works, Tottenham, London, N .I7 Telegrams: “ Benjalect, Southtot, London.” Telephone: Tottenham 5252 (5 lines) November 23, 1945 E lec tr ic a l R eview 9
wait for winter — protect pipes and pipe lines now . . . Production hold-ups due to frost can be pre vented by the application of B.I. Callender’s Rockbestos brand Heating b .i. caiiender-s Rock- ° bestos brand Heating Cables. Safe, simple and economical. W rite for i . , . __ oils, whale oil, literature. glucose, etc. i L ROCKBESTOS BRAND HEATING CABLES ( b r i t i s h PATENT NO. 5 4 3 2 7 2 )
BRITISH INSULATED CALLENDER’S CABLES LTD. NORFO LK HOUSE NORFOLK STREET L O N D O N , W .C .2 10 E l e c t r ic a l R e v ie w Novem ber 23, 1^45
.... __ M i s n 'f HO." : iSlCK'tt }V'Ul':. \ \ r v , i l. .;«! _ ii , | ) R i 'iu f it e i U H i B ui
'•I*;;:; fand ■<'
NEWSPAPER ADVERTISINGlK.n !»K
5-. ¡;r W ;.l| -
(>■< fh iv ' i/ i u rn T , /V ' j
v ' . n i
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Reproduction of one of the series in National and Provincial newspapers and weekly and monthly publications. The publicity campaign also includes posters, railway and arterial road signs.
¥ BE BRIG H T... CROMPTON 5 November 23, 1945 E le ctrical R eview II
ACCURACY WITH EVERY COIN
a Switch that breaks 100 Amps without injury
FM84 PREPAYMENT METERS FERRANTI LTD., Hollinwood, LANCS. London Office: Kern House, Kingsway, W.C.2. 12 E le c tr ic a l R ev iew Novem ber 23, 19*>
Changing over from war time engagements to normal Premier production is no easy task however carefully planned, and we ask our friends who are anxiously aw aiting supplies of Premier Fine Quality appliances to bear with us, while this operation is in progress. Meanwhile, we assure them that as supplies become available they will be distributed as fairlv as possible.
PREMIER
• j / 't j / e - < 2 r f * r / / f y ELECTRICAL APPLIANCES
PREMIER ELECTRIC HEATERS LTD., BIRMINGHAM, 9
R P -665A ; Novem ber 23, 1945 E lec tr ic a l R eview 13
Our Managing Director came to work on a horse. It took him 3-| hours and a sore sit-me-down, hut he says it proves his case and was worth it. He says it was a public gesture, and we’ve to tell all firms who don’t use power tools about his 3| hour ride and his sore sit-me-down. And when they say : “ Why does he waste time like that when he could travel by train ? ” we’ve got to answer : “ Y o u should talk ! ” He says there's a moral in it.
DESOUTTER Specialists in Lightweight, Pneumatic & Electric Portable Tools DESOUTTER BROS. LTD., (Dept, R \ The Hyde, Hendon, London, N.W.9, Telephone: Colindóle 6346-7-8-9.
C.R.C. I 52 14 E lec tr ic a l R eview Novem ber 23, 1945
Insulated with
By courtesy of Dttratube & Wire Ltd.
‘WELVIC’ brand of POLYVINYL CHLORIDE
IMPERIAL CHEMICAL INDUSTRIES LIMITED LONDON, S.W. 1
P.W.19 November 23, 1945 Electrical Review 13 'ENGLISH ELECTRIC' HIGH-BREAKING-CAPACITY • HIGH-VOLTAGE
SWITCHGEAR
TY P E OB33 FOR VOLTAGES UP T O 3 3 kV.
Six-panel, truck-type Switchboard, embodying 3-3kV. 400A, ISOMVA Air Circuit-breakers, Type OB 3 3 , w ith one moving portion withdrawn.
English Electric' Switchgear, Type OB 33 is particularly suitable for use on high- voltage circuits with breaking-capacities up to 150 MVA, at 3-3kV.
IMPORTANT FEATURES • Elimination of oil fire risk. • High-pressure silver-faced butt contacts. • Non-pitting arcing contacts. • De-ionising arc splitters. • Electrical operation, manual if desired. • Truck, or fixed cubicle mounting, with fully interlocked isolation.
ENGLISH ELECTRIC Larger view of a moving portion. C O T v I P A N - V LIMITE D • • S T A F F O R D * • As Plastic Moulders with unrivalled experience in the Electrical
and Wireless Trades, we look forward to the opportunity of
employing the extensive knowledge gained from working to
exacting war-time specifications in assisting you to solve your
post-war Plastic problems.
INSULATORS LTD
JiAx>tvL€Li4xj^s yt/teA jut
LEOPOLD ROAD • EDMONTON • LONDON • N 18 . PHONE: TOT 14*1 (4 line.) November 23, 1945 E lec tr ic a l R eview 17 VtSKRÍNGS CLOSE-UPS
A great advantage of “ Visk rings ” Cable Markers is that lliey are available in all colours, indelibly printed in black with any wording. Ilerc is double identification— colour and wording. A positive boon in complicated circuits»
• NO TOOLS REQUIRED •INDELIBLY PRINTED • N O RUBBER U S E D • SELF FIXING BY SHRINKAGE • IMPERISHABLE, IMPERVIOUS TO • DO NOT INCREASE DIAMETER OILS AND PETROLEUM OF CABLE
VISCOSE DEVELOPMENT CO. LTD. Woldham Road, Bromley, Kent. 'Phone : Ravensbourne 2641 18 Electrical Review November 23, 1945
Made by Ellison craftsmen in one of the World’s great switch- gear factories, Ellison starters are controlling the electrically driven pumps in breweries, factories and water works throughout the country. Their sound design and robust construction ensure many years of unfailing service.
518 November 22, 1945 c.l e c t r ic a l R e v iew 19 TOTALLY ENCLOSED SURFACE COOLED Bi’ook Motoi’g USES Surface-cooled motors are designed to w ork under atmospheric con ditions too severe for protected types, e.g. saw-mllls. flour mills, cement works, etc. They w ork well in the open, and resist the action of acids, d irt, damp and g rit. These motors are not waterproof, and should not be used in positions where they are likely to be submerged
FEATURES Straight-through oversize shaft without weakening shoulders. There are no pipes o r ducts to Impede the flow of cooling air. The design is such that the stator stampings are in direct contact with the cooling air. In the cage m otor the rear shaft extension carries a pressed steel fan. while in the slipring type the fan is mounted at the pulley end to avoid interference w ith the slip-rings. The fan draws cooling air through the mesh in the bell-shaped cover and directs it. at high velocity, over the yoke of the motor. On load the temperature rise does not exceed 90 deg. F. The carcass Is provided w ith condensation holes underneath. Alternative types of surface-cooled machines which can be offered are Standard w ith feet. Flange w ith feet, and Flange w ithout feet, cage type only.
OUTPUTS \ to 120 h.p. for single, tw o or three phase, alternating current supply.
BROOK MOTORS LTD • Huddersfield Specialists in the manufacture of Alternating Current Motors in Squirrel Cage and Slip Ring types from I/3rd to 200 h.p. 20,000 h.p. speed types are listed for every industrial use, and thousands of these motors in all types have been supplied to various countries. Brook Motors are the largest exclusive Alternating Current Motor Manufacturers in the world.
The Brook Motor factories, where 8,000 motors are made each month. EMPRESS . PRINCESS • DUCHESS WORKS HUDDERSFIELD
C 2 0 E l e c t r ic a l R e v ie w Novem ber 2 3 , 1945 The better use of
Where to look for further economies
yo u may have d e c id e d that you have reached the limit of improvement in efficiency of power usage. But are you sure ? Why not make doubly sure by going through these Bulletins point by point? If your search reveals only a single possibility it will have been well worth while. The probability is that you will find many. Turn up these Bulletins: FUEL ECONOMY BY SAVING ELECTRICITY FUEL ECONOMY AT COLLIERIES (Bulletin No. 13) (Bulletin No. 32) A rapid survey of the possibilities. The colliery official will find this Brief, practical pointers that take Bulletin a real boon. It is a guide you straight to sources of sub to the economical operation of stantial economy in electricity colliery compressed air plant, but consumption. it also contains a brief summary of hints on steam boilers, prime THE INDUSTRIAL USE OF COMPRESSED movers, fans, pumps and so on. AIR (Bulletin No. 29) Compressed air is a very con SMALL VERTICAL BOILERS, STEAM CRANES venient medium of power trans AND SHUNTING ENGINES mission. But it can also be a great (Bulletin No. 37) waster of power unless carefully These power units are often supervised and maintained. This neglected. How fuel losses can be Bulletin tells you what to look for reduced and operation improved and how to put it right. is explained in a very practical way.
UNTIL YOU HAVE looked into the possibilities of every recommendation in these Bulletins you ought not to decide that your power is being used efficiently. If you haven’t all the Bulletins ready at hand, please ask for the copies you need from the Regional Office of the Ministry of Fuel and Power.
ISSUED BY THE MINISTRY OF FUEL AND POWER November 23, 1945 E le c t r ic a l R eview 21
I ______
ALTERNATORS 25 kVA to 2,500 kVA Pedestal Bearing Series
oosse/3^ 8
T HE extensive experience which the Many types of Alternators are available Company possesses in the con suited for drive by all classes of prime struction of plant for electric generation movers. is embodied in the design and construc The important constructional features are tion of “ BRUSH ’’ Alternators. The outstanding feature of these set out in publication ER/B.226—w rite machines is the high efficiency of opera for your copy to-day mentioning the size tion characterised by low internal losses. of machine in which you are interested.
THE BRUSH ELECTRICAL ENGINEERING CO. LTD. LOUGHBOROUGH, ENGLAND 8.61
BRANCHES : [London, Manchester, Leeds, Birmingham, Newcastle, Glasgow, Cardiff, Bath, Belfast, Dublin 22 Electrical Review November 23, 1945
TURBO-GENERATING PLANT Installed in Canada
Two 15,000 kW . Parsons Turbo-Alternators supplied to the Corporation of the City of Edmonton, Alberta, Canada.
Also Manufacturers o f :— ELECTRICAL TRANSFORMERS, TURBO-BLOWERS, TURBO COMPRESSORS, SURFACE CONDENSING PLANT, GEARING, GLASS AND METAL REFLECTORS, ETC. C. A. PARSONS & Co., Ltd.
HEATON WORKS, NEWCASTLE-ON-TYNE, 6. LONDON OFFICE : 56 VICTORIA STREET, S.W.I November 23, 1945 E le c t r ic a l R eview
PARTICULARS ON APPLICATION 24 E l e c tr ic a l R e view Novem ber 23, 1945
The reliability of the generating plant is the same as that of its dis tributive cable. And the reliability of the cable is that of its insulation! That is why leading cable manufacturers use Tullis Russell Rothmill Cable Insulating Papers. Rothmill is renowned for its uniformly highquality.and isguaranteed free from metals and grit. R o t h ik il l A complete range is manu factured. W rite for details. CABLE INSULATING PAPER Tullli <2 u*tell i Co. ttd The Pioneers of Twin-wire Papers for Printers IUCHM UTY & ROTHES PAPER MILLS, MARKINCH. SCOTLAND ONDON MANCHESTER BIRMINGHAM ‘Tudor Street. E.C.4 372 Corn Exchange Bldgs., I IS Colmore Row Corporation Street Novem ber 23, 1945 E le c t r ic a l R eview . . . Here’s something good
METAL CAPS are fitted under great pressure. | in H.R.C.fuses N o c e m e n t is used.
THE PATENT INDICATOR is a bead secured by a fine high resistance wire. Fusing ejects the bead.
THE CARTRIDGE is_ of special ceramic material made in the M.E.M. pottery.
M.E.M ‘ Kantark" High Rupturing exceptional in that they can be used in existing Capacity Fuses have only been released after M.E.M. fuseboards, thus making conversion undergoing the most stringent, independently to H.R.C. fusing easy. Types are available observed tests in one of the few testing stations for use in fuse carriers of other makes. in this country able to provide the heavy short A wide range is available in ratings from circuit currents required. 5 to 200 amps, for voltages up to 440 A.C. Their compliance with B.S.S. 88/1939 is and 500 D.C. fully assured. A design has been developed which offers the greatest convenience and ^ WRITE FOR LIST No. 270 interchangeability in use. It gives all particulars with details of the M.E.M. “Kantark” H.R.C. Fuses are comprehensive tests applied.
“KANTARK” H.R.C. FUSES
MIDLAND ELECTRIC MANUFACTURING CO. LTD., TYSELEY, BIRMINGHAM, 11
Loadon Showroom* and Stores : 21-22 Rathbone Place, London, W.1 Manchester Showrooms and Stores . 48-50 Chapel Street, Salford, 3 Novem ber 23, 1945
INCORPORATING NEW FEATURES
ParHculars From”BVRcbVD.^SE^GROVE. BURLEY.
A * « * '
. . . often apparently difficult, but simple when you know how. If your wire problem is to choose a suitable resistance alloy for any purpose, investi gate the properties of the well-known Brlghtray series of nickel-chromium alloys for a quick and simple solution.
Write for a free copy o f our booklet “ Electrical Resistance Materials."
HENRY WIGGIN & COMPANY, LIMITED GROSVENOR HOUSE • PARK LANE • LONDON • W.l November 23, 1945 E le c t r ic a l R ev iew 27
IN VERTED VERTICAL ISOLATION E.H.T. METALCLAD SWITCHGEAR
REMOTE SOLENOID CONTROLLED OPERATED
SECTIONS 2 and 3 of a 3 Section Scheme of distribution' for a large Corporation Undertaking
Section 2 Section 3 MAIN MAIN Distribution Distribution Switchboard Switchboard
Remote Control Board for | Sections 2 and 3 Switchboards Illustrated above IVT 3 Metalclad U nit AIR YORKSHIRE or COMPOUND INSULATED. SWITCHGEAR SHORT CIRCUIT TESTED a n d onciiw£?usujCo [ti in ex cess of breakerrating LEEDS CATON PATENTS C ce rtifie d to BSS116/1937 TELEPHONE 5 1 0 3 8 / 9 T E L E G R A M S CONTROLLER up to rated capacity London Office : Grand Buildings, Trafalgar Square, W.C.2 Telephone : Whitehall 3530 2 8 E l e c t r ic a l R eview Novem ber 2 3 , 1945
T fte K eyn o te
The keynote of Scott Motors is economic efficiency. Economy of power input and low maintenance costs, with continued efficiency under all conditions, these factors have earned for SCOTT MOTORS the name of “ one of Britain’s best motors”.
HUGH. J. SCOTT & CO (BELFAST) LTD • VOLT WORKS • BELFAST - NORTHERN IRELAND.
OIL-PROOF PETROL-PROOF NON-AGEING NON-INFLAMMABLE
-sypt
DUhACABiES DURAWIRES
ty'MàliVoïthy
Sole Manufacturers duratube s wire ltd November 23, 1945 E lectrical Review 29
THE -R >W W i
THE TOWER BRIOGE
ihe last of the Thames bridges east of London. Designed by Sir Horace Jones and Sir J. Wolfe Jarry. Completed 1894. On the right of the sicture the Tower of London is seen in the distance CRYSE
FIFTY YEARS OF QUALITY & SERVICE ^S'vancJier) BIRMINGHAM BURY ST EDMUNDS LEEDS LONDON BRIGHTON CARDIFF LEICESTER MANCHESTER BRISTOL GLASGOW LIVERPOOL NEWCASTLE
CRYSELCO LIMITED, KEMPSTON WORKS, BEDFORD November 2 3 , 5945 E l e c t r ic a l Re v ie w
w s t n
The reputation acquired in nearly half a century’s dili- gent labour is no small asset. W e prize it too highly W j>» 0>- ' - ,,,y to produce any appliance which is
-X not a crec|jt to our name |n fa c ti
the upholding of your esteem is the foundation of our future.
Diagram for Temporary Lighting with Fittings connected to 6-Way Tee
WEATHERPROOF METAL- CLAD MULTIPLE SOCKETS AND TEES For Electric Lighting and Power, T ransmission, Communication,
3-Way Multiple Portable Tools, etc. Socket & Covers Current Price List cancelled. Sew List available
Manufactured by SIMMONDS & STOKES LTD. VICTORIA HOUSE. SOUTHAMPTON ROW. LONDON, W.C.I HOLBORN MJJ November 23, 1945 E lec tr ic a l r e v ie w 31 Consider the Question of Values Switchgear and Motor Control Gear which is cheapest in price in the first instance may cost you more in the long run
THE SYMBOL OF RELIABILITY To AVOID breakdowns SPECIFY “ ERSKINE HEAP ” SWITCHGEAR and CONTROL GEAR whose unfailing reliability on heavy duty work has won them a worthy reputation amongst the more important Industrial Users and Supply Authorities through out the British Empire. ERSKINE. HEAPaC^IP Head Office and Works: rTo/tv London Office: BROUGHTON, MANCHESTER 7. O W llCilgear GRAND BUILDINGS, TRAFALGAR SQ. Phone: DEAnsgate 4561 (4 lines). etc Phone : ABBey 2748-9. Grams: “ Electron,” Manchester. J|/CLHtlt5L5 Grams: ” Erskineap, Phone, London.” BRANCH OFFICES ANDAGENCIES IN ALL PARTS OF THE WORLD EI-U80 3 2 El e c t r ic a l R eview Novem ber 23, 1945
III f he The D IXO N Power Floor Scrubbing Machine is specifically designed for industrial use. In the transition from war to peace production many factories will have to be re-equipped and brought up to date ; the essential item of their equipment will be floor cleaning apparatus, and the Dixon Machine is the only one specially designed for such work. It wet scrubs large areas of floors 7 times faster than old-fashioned methods ; can be used by any available labour ; and is suitable for all types of floors. In addition it can be used for dry scrubbing or can be converted into a floor polisher. W ith the release of further materials for produc tion, Dixon's will be able to accept your orders. Please write us for fuller information.
DIXON £- CO., LTD CAPITOL WORKS, EMPIRE WAY, WEMBLEY, MIDDLESEX P H O N Ï ; WEMBLEY A ( 3 9
Showrooms : 80-82 Regent St. (Quadrant Arcade), London, W .I. Regent 5771/2 « November 2 3 , 1945 E lectrical Review 33 REFLECTORS FOR 80 WATT TUBULAR ITHORUIXFLUORESCENT LAMPS ichiot lij m it
ll«s w-, *ISi! 'diD tort 'Poise rpnde ironie
W ITH SLOTS FOR UPWARD ILLUMINATION I 1748 I Lamp w ith Box - £3 0 0 + 25% 1749 I Lamp w ithout Box 2 7 6 + 25%
WITHOUT UPWARD ILLUMINATION 1764 I Lamp w ith Box - £ 3 0 0 + 25% 1762 I Lamp w ithout B ox- 2 7 6 + 25% Prices include Hooks and Patent easy wiring box on top of trough. Fixings arranged for any make of control gear.
F W THORPE □ M t ï ï& Ê S BIRMINGHAM28 Telegrams THORLUX, B'HAM 2 8 Telephone: SPRINGFIELD 33/ 5-9 1945 l R ev iew November 23, M akers of Synthetic
(IMPREGNATED AND COATED)
BT APPOINTMENT TO H.M. THE KINO MAKERS OF ACCUMULATORS. HART ACCUMULATOR CO. LTD. MARSHGATE LANE, STRATFORD, LONDON, E.15 SAMUEL JONES & CO. LTD Telephone : MARyland 1361/3 Branches at 16-17 NEW BRIDGE STREET, E.C.4 Birmingham, Bristol, Cork, Dublin, Glasgow, Manchester PHONE: CENTRAL 6 5 0 0 Newcastle-on-Tyne - Nottingham and Westminster
UNIVERSAL SWITCHES FOR MACHINE CONTROL Snap Action— Contacts return to normal position when pressure removed. Weight — 2f ounces. Dimensions—2"x ii"x i". Switches capable of taking plunger impact up to 12 lbs. Plunger travel in cluding over-ride .25" approx. Plunger operating movement +.013". Operating differential .010". Plunger operating pressure—From 1 to 5 lbs. Contact rating — A.C. 5 amps at 2 5 0 V . Contact rating—D.C. 5 amps at 12-29 v. Silver contacts. Three types available — All single pole. Com pletely sealed against oil, dirt, INSULATED petrol, water, etc., and approved by A.M. for tropical use. Switches WIRES AND can be supplied for “ built in” applications without cover and STRIP plunger, if required. Black bake- lite housing. Mounting through two fixing holes lined with COVERED WITH ENAMEL COTTON brass tubular rivets. Ex 8ILK VARNI8H QLA8S ecutives, Production Personnel, Research ENAMEL AND PAPER Engineers should contact us, if they are interested in Samples and Prices on Application these Fine Lim it Switches. Prices on M ADE BY application. Various contact F. D. SIMS LTD. arrangements are HAZELHURST WORKS. R A K8B0TT0*. LANCS. available.
Telegrems i Telephone : P Y E LTD. RADIO WORKS - CAMBRinr.F “SIMS, RAMSBOTTOM ” RAMSBOTTOM 2213/4 35 November 23, 1945 E le ctrical R eview
There need be no risk of square peg motors system in which finished parts and sub- doing round hole jobs if you have the assemblies are standardised and stored, Crompton Parkinson catalogue on your where the complete motor is of a type not desk. There, in the standard range of over stocked. Whatever the needs of the drive 2,000 types, you will find the correct motor it is easy to select the correct motor by for almost every need. calling on the Parkinson A.C. Motor These motors are made by a flow production Service.
CRomPTOir^PRRKinson LIMITED
ELECT RA HOUSE. VJClORlA EMBANKMENT. LONDON, W . C . 2 3 6 E le c tr ic a l R eview November 23, 1945 No i ember 23. 1945 E lec tr ic a l R ev iew 3 7
ELECTRONIC = ------VARIABLE SPEED DRIVE ^WlTH HAND OR COMPLETE AUTOMATIC CONTROL FOR ALL VARIABLE SPEED POWER DRIVES p m . A.C. SUPPL
"ÜaAÙ&peed. " h / u / M - Illustration shows automatic “ Varispeed” Drive on “ Lancaster,> spar boom milling machine, the latter having multiple “ Varispeed ” motors, the one shawm giving 75 B .H .P . Write for descriptive leaflet from the patentees THE ELECTRIC CONSTRUCTION C9ITP WOLVERHAMPTON 'Jelephone 2l455i7&««i 38 E lec t r ic a l R evu w November 23, 1945
Regd. design—Berry’s patents
BERRY'S ELECTRIC LTD November 23, 1945 E lec tr ic a l R eview 39
BATTERY CHARGERS AND RECTIFIERS
3 -C ircu it Battery Charger
Selenium Battery Charger for Electric Vehicles
P ortab le D.C. Power Supply
Engine Driven C.P. Battery Charger
Motor Generator Battery Charger
CRYPTON EQUIPMENT LTD • „"Afc • GEORGE STREET • BRIDGWATER » SOM. Lancashire Dynamo L Crypto Ltd.. Foster Transformers I Switchgear Ltd. A i i o o o t e d Compañía : 40 E l ec t r ic a l R ev iew November 23. 1945
7 > i< ? WEIR who ELECTRICAL INSTRUMENT^
W il u t
AMMETERS • VOLTMETERS D.C. Autom atic Moving Iron and Moving Coil R e v e rs in g Scale sizes—2, 21, 3j, 4, 5, 6 Rheostatic and 8 inches S t a r t e r Projecting, Flush & Controller Open or Protected Dials Portable instruments in h a rd w o o d cases On ADM., W .D. & G.P.O. Lists Air Ministry Approved. For automatically reversing D.C. shunt, series or compound wound motors that require armature resistance in circuit at starting. Suitable for B R A EfFO R D- hoists, lifts, machine tools, etc. w l & u wn,-CU^on, WILTSHIRE DON THE DONOVAN ELECTRICAL C”!." [JELECTRICAL ENGINEERS AND BIRMINGHAM. 9 STOCKHOLDERS P P - 7 0 S /W.-STEcwoiu> 2 2 7 7 ( P B .X ) Gkams - Ddnovan . Birmingham
THE GENERAL PURPOSE MODEL PYROBIT SOLDERING IRON Is designed for light and medium Soldering jobs. It is ideally suitable for all kinds of Radio work or general domestic use. Also for Motor Engineers it is especially suitable, as the Iron can be supplied fitted with either 6 or 12 Volt elements or such elements can be obtained and fitted by THE ACRU the purchaser, so ELECTRIC TOOL that the ron can MANUFACTURING CO. LTD be used Manufacturers of Speciality Electrical Apparatus Ask for Leaflet on the Car Battery. 123 HYDE ROAD, ARDWICK, MANCHESTER 12 T e l. : A R D w ic k 4284
Bronte DOMESTIC AND COMMERCIAL ELECTRIC LIGHT FITTINGS TABLE LAMPS AND FLOOR STANDARDS IN CHROME, BRONZE, ANTIQUE BRASS, OXY-COPPER, AND COLOURED ENAMELS THORNTON PRODUCTS LTD., Bronte Works, THORNTON, BRADFORD November 23, 1945 E lec t r ic a l R eview
Australia
ALL ROUND THE A m e rica COMPASS
Hackbridge Transformers are backed by nearly a quarter century of ex perience in constructing millions of kVA of transformers including very large units of over 90,000 kVA capacity, for service all over the world. The illustrations show, for example, installations in Tasmania, South America, Canada and East Africa.
HACKBRIDGE ELECTRIC CONSTRUCTION CO LTD. W ALT O N.O NT NAMES, SURREY telephone V/alton-on-Thames 760 (8 lines) Telegrams " Electric. Walton-on-Thames Electrical Review Novem ber 2 3 , 1945
Selecting the correct equipment for the job is the most important factor in secur ing efficient and trouble free ventilation. Airspin Fans are designed by Ventilating Engineers and are available in a range of sizes to meet a wide variety of require ments. Full details are g.ven in our new list. Send for your copy now. C U h S fit t i VENTILATING FANS 52 CLERKENWELL CLOSE F.H.BIDDLE LIMITED LONDON E.C.l TEL. CLERKENWELL 6 3 4 5 T E L E G R A M S .’ EFB/DDLE SM/TH LONDON
"Hints on machiyünq TURNING. To obtain the best results t u fn o TL use sharp tools, high LIGHTWEIGHT THE ENGINEERS MATERIAL, NON-METALUC. speeds and light cuts. High speed steel tools are recommended. Tools should be specially reserved for machining Tufnol. Grind and sharpen ordinary metal working tools in accordance with recommendations in the “ Manual on Machining Tufnol Overheating, dis coloration and “ burning” are the
Information on all machin result of incorrectly shaped or applied ing operations is contained tools. Back off the end piece before turn in our “ Manual on Machining Tufnol ing banks of washers, gear blanks, etc. TUFNOL Lie PEwùY Qa PP Qi RM injG ha
43 November 23, 1945 E l ec t r ic a l R eview 43
I m 44 E lec t r ic a l R ev iew November 23, 1945
'Y
ELECTRICAL PRODUCTS STRENGTH iVytex must be qooct’ GEORGE H. SCHOLES & CO. LTD. Wylex Works, Wythenshawe MANCHESTER _____ N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w maXLUMe OVERLAMP REFLECTOR LIFT, TURN AND LOWER OVER THE LAMP
D ortt let d ir t spoil yo u r Lighting Schemes
IN SIST ON ■H4 XLUME OVERLAMP REFLECTORS THEY ARE EASY TO CLEAN !!
CONSULT- London Office : BRETTENHAM HOUSE VERITYS LTD. LANCASTER PLACE ASTON - B’HAM 6 W .C.2
Depots at BIRMINGHAM - MANCHESTER - BRISTOL - GLASGOW NEWCASTLE-ON-TYNE 46 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945 m ■ ■ cuts assembly costs/ cuts production time/
cuts its own STANDARD MACHINE The problem of providing a D.C. supply THREAD —for the operation of electric loco motives and trucks, cranes, hoists, lifting magnets, magnetic clutches and separating plant, fo r small scale o r bulk charging of batteries for electric vehicles, emergency lighting, etc., for almost every application where D.C. is required—is most effectively solved by installation of a HEWITT,1C RECTIFIER, the simplest, most reliable converting plant made. This equipment normally operates com pletely unattended, is easily installed in existing buildings and awkward sites.
In types ranging from wall-mount- i n g b a tter y chargers up to large substation plant of several thousand k W capacity: includ- i n g special outdoor trans portable units for temporary install ations.
TRADE MARK No. B6II53S THREAD-CUTTING SCREWS
British Patents Nos. 386083, 386895, 495194, łjewitiic ífecéi 495252 and 496445. HEWITTIC ELECTRIC CO. LTD. BARBER & COLMAN LTD., MARSLAND ROAD BROOKLANDS MANCHESTER WALTON-ON-THAMES, SURREY TEL.SALE 2277(3 LINES) . GRAMS.“ BARCOC* SALE Telephone : Telegrams : W alton-on-Thames760(81ines)." Hewittic ,Walton*tn-Thames" N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w 47
This Heavy Duty S.P. Pedestal insulator is used extensively on 132kV Outdoor Switchgear. We make many types of insulators for all purposes and it may be worth your while to consult us before you finalize your design. STEATITE & PORCELAIN PRODUCTS LTD. H ead Office : Stourport-on-Severn, W orcester. Telephone: Stourport 111. Telegrams : Stcatain, Stourport 8MI E l f c t r i c a l R e v t e w N o v e m b e r 23, 1945
RESISTANCE NCTS 3¡yaa:aí«í.ír*mv:^^rK«¡sa5^K»B
IN ADDITION TO A COMPREHENSIVE RANGE OF STANDARDISED SIZES, SPECIAL TYPES ARE MADE AT SHORT NOTICE WRITE FOR CATALOGUE Send particulars of your requirements ALWAYS IN STOCK E.R./llO to our Technical Service Dept. IMMEDIAT! DELIVIRIIS AIIASTKA LOW TENSION 31-32 T0UJ6 R STR66T — BIRMINGHfiM 19 POLES n « l I-*- I TD TYBURN R° ERDINGTON PHONE: ASTON CROSS 3463-4 g r a m s : o h m i c • B i r m i n g h a m rULES L_ BIRMINGHAM.24. ★technical books'
MODERN TRADE-MARK ELECTRIC CLOCKS By Stuart F. Philpott, A.M.I.E.E. Describes and illustrates every im p or- tant principle of electric clock con RESISTANCES struction, installation and upkeep. Manufactured by specialists, built for durability, Complete chapters are devoted to each and entirely British. kind of clock, and w ith the aid of photographs and explanatory diagrams, it is shown exactly how each type is b uilt and controlled. Third Edition 8s. 6d. net ELECTRIC LIFTS By R. S. Phillips, A.M.I.E.E. This comprehensive w o rk describes in detail the numerous types of passenger, goods and service lifts, their construc tion and installation, and the full procedure of inspection and overhaul. One of the very many types available Numerous illustrations are included, CATALOGUE ON REQUEST together w ith useful reference material. The ZENITH ELECTRIC CO. Ltd. A book of great interest and value to Sole Makers of the well-known ■•ZENITH" Electrical Products electrical engineers. 2 5 s . n e t . ZENITH WORKS VILLIERS ROAD, WILLESDEN GREEN LONDON, N.W. 2 ★ PITHAA ★ rowhv»: WILIeiden ,087-8-, -Vol„„h™. Uodoo" m m Pitman House, Parker S t . Kingsway. W .C.2 H I' j : N ove mite r 23, 1945 E l e c t r i c a l R e v ie w 49
S O U N D SIGNALS STAFF LO C ATO R S LUMINOUS CALL SYSTEMS FIRE, BURGLAR AND MINING SIGNALS BANK RAID ALARMS TELEPHONES • RELAYS STRIKING, CHIMING AND W ATCH M AN’S CLOCKS T O L L I N G MECHANISM ELECTRIC IMPULSE CLOCKS LIQUID-LEVEL INDICATING, SYNCHRONOUS CLOCKS RECORDING & ALARM APP, PROCESS TIMERS IDLE MACHINE AND OUT TRANSFORMERS P U T RECORDERS
ELECTRIC CLOCKS Pioneers in the manufacture and development of Electric Clocks, Gents’ of Leicester are looking forward to the return of Peace-time conditions when they will be able to offer the full benefit of their experience to those requiring electrified time.
GENT & CO. LTD. Also London • Newcastle-on-Tyne Faraday W orks, LEICESTER ^ ESTA B. IÖ 72 Glasgow • Belfast • Dublin
Two or three arm lamp brackets can be supplied at an extra cost. The MOTORLITE Standard rating—60, 80 and 120 V, A max. Volts 440, min. V o lts 12
M ade by THE CONCORDIA TRANSFORMER CO. a subsidiary of THE CONCORDIA ELECTRIC SAFETY LAMP CO. LTD. This low-voltage unit of maximum efficiency and safety incorporates Telephone : a double-wound trans A B B e y 4266 fo rm e r (to B.S.S. 794) and double-pole switch with 4 fuses (2HT and 2LT) all mounted on a readily removable Gas Oven type door, the opening of which breaks both circuits. The HT Terminals have safety shields. Two spare fuses for each circuit are m ounted in th e case.
SOLE SALES A G E N T S : A.I D APPROVED
ELCORDIA UNITED, 2 CAXTON ST., W ESTM INSTER, LONDON, S.W. 50 E l e c t r i c a l R e v ie w N o v e m b e r 23. 1945 FOR YOUR INFORMATION
Metropolitan-Vickers manufacture the following type M.U. Airbreak flameproof equipments.
MU8I This well-known Mining Contactor Unit includes an 80 amp. contactor and full protective features.
MCUI50 Similar to the MU8I but including a 150 amp contactor.
MCU80Z This contactor unit has been designed for use in conjunction with the Room and Pillar system of .mining. It includes an 80 amp. contactor (as fitted in the MU8I). Earth leakage and pilot core protection are not fitted.
MSUI50 A hand operated 150 amp. M ining Switch U n it. Earth leakage and undervoltage protection can be provided.
MUM Frequency-changer pattern Mining Drill Unit for high frequency drills.
MDU3I Transformer pattern Mining Drill Unit for normal frequency drills.
MLU20 Mining Lighting Unit including 2J kVA transformer.
NOTE ; Each type has its isolator separated from the main compartment by a flameproof barrier. Flit plugs, plugs and sockets, etc., of practic ally all popular makes can be supplied as required. With the exception of the M C U 8 0 Z all the above units can be mounted together in board formation.
W rite to us for full details of the above equipment.
METROPOLITAN - VICKERS ELECTRICAL CO., LTD. TRAFFORD PARK ------MANCHESTER 17
H M502 E lectrica l R ev iew Managing Editor: November 23, 1945 Hugh S. Pocock, M.I.E.E. Technical Editor : Commercial Editor: Contents :— C .O . Brettelle, M.I.E.E. J. H. Cosens Page Page Editorial.—Investment Control 729 Grid Improvements 749 Lime fo r the Land 731 Discovery of X-Rays 750 Views on the News 736 Commerce and Industry 751 S hort-C ircuit Calculations. By Load Equalisation. By G. Barnard, T. A. Ledward, A.M.I.E.E. 737 A.M.I.E.E...... 754 Palestine Imports 739 Electricity Supply 757 Bulk Supply of Equipment . 740 Parliamentary News 758 Tummel-Garry Project 740 Forthcoming Events 759 Mr. Watlington to Retire 741 Financial Section 760 Personal and Social 742 Recent Introductions 763 Correspondence . 745 Contract Information . 765 Services in Buildings 746 New Patents .... 766 New Lighting Code 747 “ In a Good Light ” 747 Classified Advertisements 57 Rural Electricity Supplies 748 Index to Advertisers 72
EDITORIAL, ADVERTISING & PUBLISHING OFFICES : Dorset House, Stamford St., London, S.E.I Telegraphic Address : “ Ageekay, Sedist, London.” Code : ABC. Telephone No. : W aterloo 3333 (50 lines). Registered at G.P.O. as a Newspaper and Canadian Magazine rate of postage. Entered as Second Class Matter at the New York, U.S.A., Post Office. Annual Subscription, Post free : 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.”
MICRO-LATHES MODERN SMALL PRECISION BENCH LATHES
F o r . WATCH, CLOCK AND INSTRUMENT WORK METER TEST ROOM AND REPAIR WORK ETC.
We are always ready to advise upon the adaptation of Pultra Lathes to meet special requirements.
W rite for Catalogue CA4 also Grinding and Milling Cataloeue CA 5/5
Grinding external taper on Pultra 24 GRAVEL LANE Micro Lathe utilising Grinding SALFORD 3 Attachment VIO. MANCH ESTER MANY OTHER ACCESSORIES AVAILABLE Phone BLA 9Î8Î L
E 52 E lectrical Review Novem ber 23, 1945 SHOP WINDOW REFLECTORS
WHEN RESTRICTIONS ARE REMOVED SUNCO REFLECTORS
WILL COMMAND YOUR ATTENTION ONCE AGAIN
STOCKS AVAILABLE SHORTLY
S. 224 60-WATT SIZE THE SUN ELECTRICAL CO. LTD. 118-120, CHARING CROSS ROAD, LONDON, W.C.2 Telephone : TEMple Bar 3500 (18 lines). Telegrams : “ Sunelec, W estcent, London.”
BRANCHES: LEEDS, NEWCASTLE-ON-TYNE & SLOUGH TRADING ESTATE
ß e m e l
A Kingdom has been offered for a horse . . . but even greater, in the time of emergency, was the value of having available the process for the production of “ SANWEST ” jewels when supplies of other instrument bearings were cut off almost overnight. The “ SANWEST ” V Type bearings which have been produced since those vital days have given complete satisfaction under the most arduous conditions. In 3 si^es: i. i j and 2 mm.
SANGAMO .WESTON LTD. ENFIELD MIDDLESEX [pOLITECHNJKf) E lectrica l R e v iew
THE OLDEST ELECTRICAL PAPER ESTABLISHED 1872
Vol. C X X X V II. No. 3548. NOVEMBER 23, 1945 9d. WEEKLY
Investment Control Application to the Electricity Supply Industry
CONOMISTS have devoted much investment control, and the first manifesta E thought to possible methods of tion of this to affect the electrical industry avoiding industrial booms and slumps. is a request circulated to electricity supply It has seemed impossible to solve the undertakings to state in broad detail their problem without a great deal of inter probable capital expenditure during the ference with free enterprise, but even the next three years. So far as the municipal most ardent advocates of this freedom authorities are concerned this relates to a have realised the desirability of smoothing supervision of public expenditure which is out the production curve. About eighteen already exercised, but the companies are months ago the National Government also brought into it, thus impinging japon issued a White Paper which outlined plans the field of private enterprise, albeit a for securing full and stable employment. specialised part of this field. It was stated in this that the Government was prepared to accept in future the Urgently-Needed Plant responsibility for taking action at the The position is complicated by a number earliest stage to arrest a threatened slump. of other considerations the chief of which are the pressing need, here and overseas, Governing Factors for all the generating plant that can be It was recognised that the position was produced, and the speeding-up of electrifi- governed mainly by three factors: Private fication of industry to improve production. investment expenditure; public investment Undertakings were asked early last year to expenditure; and the foreign balance. state their requirements in the first five The first and last of these elements were post-war years with a view to making the seen to be most difficult to control. best use of the country’s industrial re Nevertheless the intention was to do sources which were likely to be overtaxed everything possible to limit dangerous during that period. The new call for swings in private investment and, by similar information raises a rather different encouraging export trade, avoid an un aspect. Can investment in capital plant favourable foreign balance. The remaining of this kind be controlled (in a restrictive factor—public investment—was considered sense) during the period immediately to be the most susceptible to control and ahead if reconstruction is to be carried the Government proposed to plan this out successfully ? to offset unavoidable fluctuations in It was recognised in the White Paper private investment. that “ a large part of the capital expenditure Since the White Paper appeared the of public authorities, for example on Government has changed, but as the policy housing, schools and hospitals, is dictated which it set out is largely in line with by urgent, public needs, the satisfaction of Socialist ideas the new Government is which cannot readily be postponed to beginning to explore the possibilities of serve the purposes of employment policy.” N o v e m b e r 23, 1945 7 3 0 E l e c t r i c a l R e v i e w
But there is other expenditure which cannot A. Haddock (chairman, I.E.E. Sheffield be postponed if the purposes of employ Sub-Centre) is that maintenance might ment policy are to be served. It seems to otherwise be repeatedly deferred because us that it would be more useful to call for of pressing needs of construction. To have estimates at a later date, say in three years’ some apparent justification for yielding to time, when investment control might be this temptation might prevent conformity usefully applied to this industry to even with a scheme for systematic periodical out production—a move which, incident maintenance, which is a corrective to the ally, plant manufacturers would welcome. natural inclination to regard anything that seems to be working well as likely U n t i l further details are to continue to do so. Government available of the Govem- as ment’s intentions it will C o n t r a r y to what we Manufacturers not be possible to gauge Transformer believe to be the experi- the effect upon the elec Oil ence of most electrical trical industry of the latest proposals with engineers, to which sup regard to the equipment of new houses. port was given recently by Mr. A. Kelso As is reported on another page, a Building at the I.E.E. North-W est Midlands Centre, Supplies and Housing Bill has been much more trouble has been given to Mr. introduced which, among other things, J. B. Lancaster (chairman, Tees-side Sub- empowers the Treasury to make funds Centre) by Grade B (pool) transformer oil available for the purchase of building than by Grade A, which he used until war materials and equipment and the Ministry needs vetoed the use of the latter. Acidity of Works to sell them to local authorities having become more of a bane than or install them on their behalf. But in sludge, the consensus of opinion appears addition to this it is announced that it is to be that the removal of anti-oxidants in intended to turn over twenty Royal the extra-refining undergone by Grade A Ordnance factories to the production of was detrimental. Possibly at the high building supplies and equipment, including load factors prevailing at the I.C.I. works, various kinds of electrical apparatus. sludging is the more important factor there. DoeS this mean that labour is to be T h e House of Commons retained at or directed to these factories Tummel- last week rejected a while established manufacturers of such Garry “ prayer ” for the annul- equipment are left high and dry ? Scheme ment of the Construc Discussions o n th e tional Scheme No. 2 Con Farm supply to isolated farms firmation Order, 1945, after a long debate. Transformers usually turn on capital This is the Order covering the Tummel- expenditure. Less is heard Garry development about which Scottish of the iron and copper losses of the authorities and individuals have very individual transformers and 400-V lines divided opinions. This scheme is the up to perhaps 800 yd. installed for the largest and most remunerative of the purpose. Yet, as Mr. L. Douglass states Board’s projects and is designed to in our Correspondence section, the value “ carry ” a number of distribution schemes of these losses may exceed the capital which in themselves are “ uneconomic.” charges on the extensions. In Carlisle Ostensibly the dispute has been between (see Electrical Review, October 12th) a beauty and utility, although properly- surcharge of 15 per cent, on the urban planned hydro-electric works can be both tariff is made for rural supplies, but beautiful and useful. experience in the Isle of Man is that this is not nearly enough to cover losses. It is some time since we Passing last appealed to readers to S e p a r a t e sectional or- Copies On pass on their copies of the Construction and ganisations for dealing Electrical Review to men Maintenance with constructional and in the Forces but the need still persists. maintenance work are We have just heard from an education generally held to be desirable, if economic officer with the M.E.F. that he is anxious ally feasible. One good reason is that the to obtain technical and trade journals for two classes of work call for men of different the vocational information rooms which temperaments. Another mentioned by Mr. are being set up. N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 731 Lime for tlie Land Electrical Applications to Limestone Mining and Preparation N the early days of the war it was I found that the land of this country was generally deficient in lime. Earlier, burned lime had been used for liming the land, but this was in short supply and the Ministry of Agriculture took steps to increase the production of ground limestone, the use of which for the land had found considerable favour abroad. Six grinding mills were obtained from America and one of these was purchased and installed at the Halkyn (North Wales) workings
stone from this source in the past, but now the material is produced from under ground workings and hoisted up a vertical shaft some 900 ft. deep to the preparation plant above ground. The actual winning of the rock is effected in a “ stope,” an under ground excavation which is about 30 ft. wide and at present about 200 ft. high. The stope floor is at a level above that of the mine bottom, and communication up to the stope is by vertical channels and chutes cut through the rock. After release by drilling and
Limestone mined from the Halkyn mountain is fed from the stope down the vertical chutes at the bottom of which it is collected in the cars (centre). Trains of cars are hauled to the shaft bottom by electric locomotives (right) of the Halkyn District United Mines, Ltd., by whose cour tesy we recently visited the workings to obtain the infor mation and photographs for this article. The workings are in the H alkyn m ountain, which is virtually limestone. A number of quarries have obtained lime- 732 E l e c t r i c a l R e v i e w N o v e m b e r 23, 1945 blasting the rock is fed down the vertical the shaft bottom in trains of 20 to 40 cars chutes, at the bottom of which it is collected hauled by electric locomotives. These are in 18 cu. ft. capacity haulage cars. B.E.V. (Wingrove & Rogers) equipments, Compressed air for the pneumatic drills is some having a total capacity of 8 H P and provided by two Beiliss & Morcom two-stage some o f 6 HP. Each locomotive has twin compressors, each having a capacity of 500 60-V motors, one at the back and one at the front in the main body of the vehicle, and each motor drives separately to a corresponding axle, back or front, with transmission by worm gearing. There are two 30-V, 100-Ah storage batteries on each locomotive, rest ing on the main body, one at each end, so !hat they are easily removable for charging purposes. The bat teries are connected in series and supply both motors at 60 V. The space between the two batteries constitutes the driver’s platform which is equipped with
Adequate arrangements are provided for charging the locomotive batteries under g ro u n d cu. ft. of air per minute at 100 lb. per sq. in., and being driven by a 108-HP 365-RPM directly coupled 400-V Lancashire Dynamo s.r. motor with Brookhirst control gear: Although the pressure of the external air system is maintained nearly constant by the automatic operation of the compressor valves with variations of the pressure, the compressors and their driving motors run constantly during service hours and just idle at no-load times. Other underground applications of the air from these motor-driven com pressors are to air-driven fans for ventilating the workings, air-driven loaders for the haulage cars, and to “ air lamps ” for lighting the under ground roads, etc. Each of the Davis “ air lamps ” comprises an ordinary The cars are hoisted up the twin-cage shaft by a surface electric lamp in a well-glass type of winder ; shaft bottom fitting. In the head of the fitting is a tiny air-turbine driven dynamo which pro a tramway-type controller for the driving duces current for the lamp. m otors. The cars run on a 221-in- gauge railway Adequate arrangements are provided for and usually take their loads of limestone to charging the batteries in a room hewn out of N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 733 the rock to which a branch line is extended so Ferranti transformer fed through B.T.H. that during charging the batteries remain on oil circuit-breakers from a 3,000-V cable the bogies. The 30-V batteries are charged in which runs down the mine shaft. All the pairs from 60-V circuits. There are two outlets 3,000-V equipment underground is mining from each circuit, so as to provide plug-in gear, although the atmospheric conditions in this case do not call for flameproof apparatus. The cars are hoisted up the twin-cage mine-shaft in normal-type rope-sus pended cages by a double drum winder at the sur face. The drums are locked on the same shaft and are so wound that when one cage is raised up the shaft the other is lowered. The diameter of the drums is about 5 ft., length 3 ft., and the peri pheral speed, i.e., the cage speed, about 12 ft. per second. The winder is driven by a B.T.H. 120- HP 970-RPM 400-V s.r. motor, and the trans mission system is double spur gears with an inter mediate shaft. The over all speed reduction ratio
Above : The double-drum winder is driven by a 120-HP m otor with double spur gear transmission Right : The primary crusher reduces the limestone to about 2 5 inch cubes ; jaws photographed from above connections to the batteries indi vidually, but the outlets are so wired in the conduit system as to provide for the necessary series connection of the two batteries. The normal charging rate is from 48A at starting, down to a finishing load of 20A. Four charging circuits (eight out lets) are provided from an open-type charging board which is equipped with a face-plate rheostat and an ironclad switch-fuse for each circuit, as well as a main switch-fuse which is supplied direct from.the DC generator of a 15-kW Metropolitan-Vickers m.g. set which has a 400-V s.r. directly coupled motor. The m.g. set is supplied with AC from a distribution board which also provides for some lighting circuits and is served from a 3,000/400-V 7 3 4 E l e c t r i c a l R e v i e w N o v e m b e r 23, 1945
from the motor shaft to the drum shaft is ments of the cars. The empty cars are about 20 to 1. The motor is operated by a released on a declined line which carries them normal rotor-resistance drum-type controller to the pit head ready to be taken under and direct-on stator switching. ground again ready for refilling. The drums are fitted with brake shoes which The limestone is passed from the 50-ton are normally mechanically oper ated at stopping and starting by means of a foot lever. The shoes can, however, be mag netically operated in case of emergency, when the magnet solenoid is energised by means of a trip switch on an overload device. On arrival at the surface the cars are taken from the cages and passed up an incline creeper with a 4-HP drive to an auto matic rotary tippler in which each car is turned through 360 deg., thus discharging its load into a 50-ton hopper. The Norton rotary tippler is served by a 50-HP Crypto motor with a first-stage wormgear trans The 30-HP motor-driven granulator reduces the rock size to mission with an actual reduc minus I inch ; note drive for feeder table tion of 710 to 73 RPM, and a second-stage pinion transmission with a hopper to a primary crusher by means of a reduction ratio of about 3 to 1. During Ross feeder. This crusher is a Broadbent service periods the motor runs constantly, machine of the Blake type with 30-in. by 16-in. jaws, and it reduces the size of the limestone from ab o u t 12-in. cubes to about 2-5 in. cubes. The crusher is driven by a 55-HP Lancashire Dynamo s.r. motor which is served by an Ellison drum-type rotor-resistance controller and a direct-on stator circuit breaker, but in the belt transmission system a few auxiliary drives are taken from the same source, including screens. After leaving the crusher the limestone is carried by a 3-HP motor-driven inclined conveyor, which has a magnetic separator on the head pulley for the removal of tramp iron, to a Mansfield granulator which further reduces the size of the rock from 2- 5 in. to m inus 1 in.
Each of the baggage machines w ill deal with the full tonnage This is a hammer-type mill and of the plant is driven by a 30-HP 960-RPM motor with multi-V-belt trans driving a set of rolls with which the tippler mission of almost even ratio to the crusher engages and disengages automatically by shaft. The limestone from the granulator mechanism which is operated by the move falls on to a conveyor belt which carries it N o v e m b er 23, 1945 E l e c t r i c a l R e v ie w 735 I
for about 50 yards on a slight incline to a jet of compressed air is blown into the tube, 200-ton storage hopper. The belt is 5-ply so as to prevent choking. The compressed and 18 in. wide, and it has a speed of about air is supplied separately by a small motor- 240 ft. per min. Transmission to the head driven compressor situated nearby. drum from the 5-HP, 705-RPM driving The bagged material is put on stillages motor is by a spur wheel and pinion. worked by Collis 1-5-ton lifting trucks by Up to the 200-ton storage hopper the which it is taken to storage or to lorries, whole of the plant is operated on day-shift and from storage to road or rail dispatch only, but the large storage capacity permits vehicles as required. Some of the loose the grinding plant, to which the limestone is ground limestone is delivered direct to special next fed and which has a capacity of 10 tons road vehicles fitted with self-operating an hour, to work throughout the 24 hours, spreading mechanism. These vehicles take with stoppages for oiling, etc. The crushed the ground product to where it is required, limestone from the storage hopper is fed to and distribute it directly on to the land in a Bradley Pulverizer Co.’s “ Junior Hercules ” the required quantities per acre. 3-roll grinding mill via a revolving feeder We are indebted to Mr. R. Pettigrew, table which is worm driven from a small general manager, Halkyn District United motor mounted at the table level and on the Mines, Ltd., Mr. M. A. Hammer, mill grinder housing. The grinder driving unit superintendent, and Mr. A. P. Newall, chief is a 100-HP motor, and the simple multi-V- metallurgist (acting under the general belt transmission system effects an actual authorisation of the company’s managing speed reduction of from 730 RPM at the director, Mr. E. Noel Humphreys) for their motor shaft to 375 RPM at the grinder shaft. help in obtaining the information upon The “ Junior Hercules ” mill is equipped for which this article is based and taking the automatic electric control by means of accompanying photographs. Brookhirst apparatus. Thus, when the mill is loaded beyond its capacity, the power rises I.M.E.A. Centre Meeting on the main driving motor and feed control is brought into action, cutting off the motor T HE chairman of the South-West England and South Wales Centre of the I.M.E.A., driving the feeder until such time as the mill Alderman W. J. Lewis (Portsmouth), invited is operating at a predetermined horse-power. the president of the I.M.E.A., Alderman Sir This eliminates manual control and assures William Walker, J.P., M.I.E.E., to a special general meeting of the Centre held at the Grand running of the mill at continuous maximum Hotel, Bristol, on November 6th. output. Sir William was accorded a civic reception by the Lord Mayor of Bristol, Councillor W. F. Dispatch Arrangements Cottrell, J.P., and later attended a luncheon at the Grand Hotel, at which the Lord Mayor, The ground limestone now has a fineness members of the Executive Committee and guests of 50 per cent, passing a 100 mesh, and is were present. The guests included Mr. J. W. carried by a screw conveyor, either to two Simpson, general secretary of the I.M.E.A., Mr. J. T. H. Legge, Central Electricity Board, small hoppers over a pair of bagging machines, Mr. A. J. Newman, Bristol, Mr. W. J. or to 1-5-ton cars which are unloaded Bache, Cheltenham, and Mr. E. C. Willis, into 6-ton hoppers which serve road or rail general manager of the Bristol Corporation vehicles for direct dispatch as loose material. Electricity Department. Sir William Walker in an informal address The screw conveyor is driven by a 7-5-HP reviewed the many activities of the electricity motor located below the floor level of the supply industry and laid great stress on the grinding house, and transmission is by continuity of supplies to war factories all over the country despite the damage caused by the Renold chain and Texrope. effects of bombing. Each of the bagging machines is capable of dealing with the full tonnage of the plant and is driven by its own 7-5-HP Lancashire Electrical Travellers’ Association Dynamo motor with even-ratio belt trans The Electrical Trades Commercial Travellers’ mission to a shaft at the bottom of the feeding Association held its annual general meeting on November 9th at the Feathers Hotel, Broadway, hopper, giving the shaft a speed of about S.W .l. Mr. F. Winstanley (G.E.C.) was elected 1,450 RPM. On the shaft of each machine president for the coming year, Mr. B. E. Crow is a 5-blade impeller which “ throws ” the (G.E.C.) chairman, and Mr. H. Potton (B.T.H.) lime powder through a filler tube on which vice-chairman. Victory and the twenty-first year of the Association will be celebrated at a the bag is suspended and which has a down luncheon in the Connaught Rooms on February ward outlet into the bag. At the same time a 15th, 1946. 736 E l e c t r i c a l R e v i e w N o r e m b e r 23, 1945 Views on the \ew s Reflections on Current Topics
A RRANGEMENTS are in hand for the mends that the consumer should not always L l first post-war convention of the Incor relv entirelv on the operation of the thermo porated Municipal Electrical Association to stat; I have found this a frequent cause of be held at Blackpool from June 24th to 29th complaints of the expensiveness of electric next year. Mr. J. W. Simpson, the secretary water heating. This consideration does not, of the I.M.E.A., tells me that in spite of staff of course, apply in the case of the refrigerator. shortage the very considerable amount of The correct use of the w ash-boiler is explained work involved has been embarked - upon. and there are hints on lighting. The booklet Accommodation is, of course, going to be winds up with a number of useful hints on the the main problem. Two hotels which are care of the installation and appliances with being released by the Government shortly notes on costs. have been booked and these will go a long * * * way towards meeting the demand. Pre-war A strange story was told by' the chairman lines will be followed as nearly as possible. at the a n n u a l meeting of Solus Teoranta, the It is proposed to have three papers for Irish lamp-making concern in which the discussion and there will again be an ex hibition, the organisation of which will be in Eireann Government is interested. He said the hands of E.D.A. Given good weather that the curtailment of electricity consump the Jubilee Convention (as this is) should be tion in Eire had led to a severe fall in sales of as successful as its forerunners. the company’s lamps and so it switched its glass making plant over to the production of * * * tumblers—then rather scarce. No sooner had In all the discussions about atomic energy this been done when there was a flood of there seems to have been an assumption that “ sea-green English glass ” into the country Russia possessed little knowledge of the w'hich drove the dearer (and superior) Irish secrets of the processes which led up to the tumblers off the market. Thereupon the production of the atomic bomb. But I have company transferred its efforts to England always remembered that Dr. Peter Kapitza, and in one day sold 600,000 tumblers in who worked with the late Lord Rutherford London at a satisfactory' price and secured a and Dr. J. D. Cockcroft at the Cavendish promise to purchase the whole of the next Laboratory', must have known a good deal year’s output. The chairman went on to about the subject. Dr. Kapitza returned to say that with heavy dumping of lamps and the Russia some time before the war and his company’s unbought production there was work appears to have continued there, for it now a huge surplus in Eire. They were, is now reported that he has been responsible however, discussing a very large foreign order for important discoveries in the field of which, in favourable circumstances, would atomic science at the Mount Alegos research keep them occupied for the next year or tw o. station in Armenia, although the reports * * » have not made it very clear what these Having read the articles by Messrs. A. H. discoveries are. Dykes and E. A. Pinto on the subject of * * * registration of electrical contractors, and the It is claimed by the British Electrical subsequent correspondence, readers mayT be Development Association that fully 55 per wondering how the National Committee on cent, of the temporary houses now being the subject is progressing. I have found erected will be all-electric.” To many of upon inquiry that Gttle is happening at the the tenants electrical equipment will be moment as the Committee has referred the something of a novelty and so to help them matter to the Ministry of Fuel and Power. to get the best results from their electrical It is probable that the Ministry's attitude will appliances E.D.A. has produced an attractive be that consideration of registration must illustrated booklet (E.D.A. 1626) describing await the reorganisation of the electricity the services which they will find in their supply industry. houses and advising them how' to operate * * * the appliances. It commences with the I read in the Electrical World (New' York) service entry' * and the main switch and that in the course of a recent strike in Texas controls and goes on to the plug points. the International Brotherhood of Electrical Next the cooker is dealt with, but I note Workers cut off the power to twentv-four that no reference is made to the use of large towns, fifty rural communities, three residual heat, which chiefly differentiates army camps and 25.000 customers of electric from gas cooking, in dealing with “ co-operatives.” Not so brotherly I think. the water heater the booklet wisely recom —REFLECTOR Kovem ber 23, 1945 Electrical Review 737 Short-Circuit Calculations Alternative to the Common-kVA Basis 60.000 x 100 N determining the maxi By T. A. Ledward, 2 = = 600,000 I mum possible fault kVA AMJ.E.F. 10 at a point in a supply net in each case or 1,200,000 work, the usual method is to calculate the for the two. Short-circuit kVA for each equivalent percentage reactance of each 33,000* 33-kV line = = 218,000 or generator, transformer, etc., on a common 1,000 x 5 arbitrary kVA basis and by this means to 436,000 total, Short-circuit kV A for determine the total percentage reactance to 40.000 x 100 the point in question. . transformer 3 = = 400,000. 10 Time may be saved in many cases by modifying this procedure. Where we are Total short-circuit kVA at F = concerned with a number of supply sources 1 in parallel only, a much quicker and more 1 1 1 1 straightforward method is first to determine 1.190,000 1,200,000 436,000 400,000 the short-circuit kVA for each power source = 154,500. separately and then simply add the figures If there is objection to the use of the together. reciprocal law for the final calculation of For example, consider the case of three the series kVA, then a combination of the generators of 70,000, 60,000 and 75,000 two methods is indicated: i.e., first calculate kVA with corresponding individual re separate short-circuit kVA figures for each actances of 13, 20 and 15 per cent. On a piece of apparatus and then for each parallel basis o f 10,000 kVA, the equivalent per group add together the separate figures. centage reactances of the generators are: The short-circuit kVA values thus obtained for each parallel group may be converted A,M x 18 = 2-57; B, 10,000 x 20 = 70,000 60,000 to percentage reactances on a common kVA 10,000 basis. Then proceed as in the standard 3-33; C, 15 = 2. Percentage 75,000 reactance at fault, F, = 2-57 x 3-33 x 2 (2-57 x 3-33) + 12-57 X 2) + (3-33 x 2)
- - t - 10,000x 100 0-84. Short-circuit kV A at F = ---- S g l = 1,190,000. By the quicker method, the short-circuit - r- * 70.000 x 100 kVA is: For A, jg = 390,000, „ 60,000 x 100 n n n n n n . 7,500x100 _ B , ------20 — 500,000; total = 1,190,000 kVA. A more complicated case is shown in Fig. 1 where a network section is connected to the busbar fed by the same generators. The effect is to introduce both series and parallel reactances. In dealing with trans formers and lines solely by the simplified method, a short-circuit kVA figure is cal culated for each unit on the assumption that m ethod; i.e., add together the percentage the transformer or line is fed by a power reactances of the groups in series and convert source of zero impedance. Where units are the total percentage reactance so obtained in parallel the kVA figures are added; to total short-circuit kVA. where in series, reciprocals of the separate Applying this procedure to the last stage kVA. of the example given the equivalent percentage Short-circuit kVA for transformers 1 and reactances on a 10,000-kVA basis would be: 7 3 8 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
10.000 x 100 Generators A, B and C = 1,190,000 10.000 X 100 0- 84; transformers 1 and 2 = 1,200,000 10,000 X 100 0-834; lines 1 and 2 2-3; 436,000 “ 10,000 X 10 transformer 3 = 2-5; 40,000 total percentage reactance = 6-474. T otal . . . .. , X, A 10,000 X 100 short-circuit kVA = —— 6-474 154,500. This figure can be checked by using the standard procedure throughout and the effort required in each case can be com pared. Where the network includes not only series and parallel groups but also closed
d - a r ( s + s + r )- e - r b ( s + s + s > In the type of example so far dealt with, the assumption that resistance was negligible as compared with reactance was justified, but even where both reactance and resistance must be taken into account, as for cables, the modified procedure may still be used. In Fig. 4 generator G feeds two busbars B1 and B2 through reactors BR1 and BR2. Ring main feeders 1, 2 and 3 connect the two bars. A short-circuit occurs at F. meshes, the calculations can still be made Following the modified procedure, a short- without converting percentage reactances to circuit figure is determined for each unit a common kVA basis. In Fig. 2, two in the network. Where large amounts of generators A and B feed separate busbars power are being dealt with—and this applies, B1 and B2, which are connected together of course, equally well to the foregoing through a reactor R. Transformers T1 and examples as to the present one —• it is T2, connected to busbars B1 and B2 respectively, feed a common bar B3. A fault is shown at F. 6o,ooo kVA Fig. 3 (a) shows the corresponding react 20 PER CENT ance diagram. Assume A, B, R, T1 and T2 io .o o o kVA io .o o o kVA to denote the short-circuit kVA of the 5 P E R C E N T 6 ,6 0 0 V 5 PER CENT corresponding units, then the kVA mesh —'TootA J ¿1)00 '--- Bl ! ABR may be converted to the equivalent BRI BR2 B2 star CDE of Fig. 3 (b) which, by the addition of T1 and T2, forms an easily solved series- ^,5 M ILES 0-25 SQ. IN. parallel arrangement equivalent to the original network. Such a conversion from mesh to star grouping is used in similar cases when the percentage reactance method is used for their solution, but where the short-circuit kVA values are dealt with in place of percentage reactances, the conversion formula is, of course, modified. To convert ABR, Fig. 3 (a), to CDE, Fig. 3 (b) : C = AB ^ +-g .Fig. 4 N o v e m b e r 23, 1945 E l e c t r i c a l R e v i e w 739 usually more convenient to work in MVA The short-circuit MVA shown as complex than kVA. Thus short-circuit MVA for quantities are given in Fig. 5. The total 60 x 100 value for BR1 and feeders is generator G = 300 and for 20 - j200(113-06 - J80-8) = _ . 10 x 100 -j200 - (113-06 -J808) J BR1 -f BR2 = = 200 in each case. Adding BR2, we get 49-33 — j77-4 - j200 = From a table of cable characteristics it is found that 0-25 sq. in. 6,600-V cable has a resistance of 0 0974 ohm and a reactance of 0-0696 ohm per 1,000 yd. The im pedance per mile, expressed as a complex quantity-, is therefore Z = (0-0975 — jO 0696) x The short- T O “
Palestine Imports Considerable Expansion in 1944
I N the electrical import trade of Palestine reported that a sum of £P30,000 had been set * last year there was a substantial advance, aside in the accounts of the corporation tow ards amounting to 50 per cent, or more in many this expenditure. groups and 300 per cent, in lamps. There was E l e c t r i c a l I m p o r t s i n t o P a l e s t i n e no noteworthy decrease. At the same time it has to be kept in mind that during the previous Inc. or year there was a steep decline all round. The 1944 dec. on Class £P 1943 accompanying table gives the values in 1944, £P with notes of increases and decreases compared with 1943, as recorded in the official statistics Insulated pipes and lead pipes for electric wiring 1,100 -r 1,100 issued in Jerusalem. D in batteries 240 T 160 Palestine has developed a small export trade, Insulated cable and wire—lead 1320 — 70 notably in dry batteries to the value of £11,770 Covered Ditto, other, not exceeding 9 sq. in 1944 (£2,900 in 1943); insulated cable not mm. cross section 8,960 -r 3,500 exceeding 9 sq. mm. cross section, £2,070 (nil); Ditto, other, exceeding 9 sq. mm. lamps, £400 (£250); and other electrical goods, cross section 6,870 — 4,490 Electric glow- lamps 26,730 -r 17,790 £10,000 (£3,270). Elec. light fittings made wholly or As was pointed out by Viscount Samuel at mainly of metal360 + 280 the last general meeting of the Palestine Electric Elec. lamps, glow, gas-filled or vacuum not exceeding 16V.. 2,980 -f 2,460 Corporation, business there during the war Elec. meters 3,100 — 2,140 developed in a remarkable degree. During Elec. refrigerators 1,660 T 820 1944 fifty-three transformers with a total capacity Ditto parts 6300 -r 2,450 Radio sets 7,240 -r 2,670 of 5,665 kVA were put into commission, and Ditto parts 8,120 -r 290 46 km. were added to the transmission and Elec. apparatus me .s. 2,730 — 2,630 distribution system. Much deferred main Electrical goods, other 27,820 -fr- 9,910 Power plant 27,640 1539 0 tenance has to be made up, and Lord Samuel “r 740 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945 Bulk Supply of Equipment Tummel-Garry Project Plans for New Buildings Annulment M otion Defeated tffcN Wednesday last week the Minister of I N the House of Commons last week a “ prayer” Health (Mr. Aneurin Bevan) moved the for the annulment of the Constructional first reading of the Building Materials and Scheme No. 2 (Tummel-Garry) of the North of Housing Bill the purpose of which is “ to make Scotland Hydro-electric Board was rejected by financial provision for the purpose of facilitating 263 votes to 45. the production, equipment, repair, alteration Moving the annulment, Mr. Snadden (Kinross and acquisition of houses and other buildings and Western) said that no one wanted to see and to make provision for limiting the price more than he did the rapid development of for which certain houses may be sold and the electricity supplies throughout rural Scotland. rent at which certain houses may be let.” His case was that the price to be extracted in The financial memorandum attached to the loss of amenity from one of the loveliest parts Bill states that “ the Minister of Works is of Scotland was too high. He refused to believe making arrangements for the production and that no alternative could be found. The distribution of, and in certain cases, may find scheme was rejected by the specially appointed it necessary to purchase in bulk building Amenity Committee, by the Perthshire County materials and components (including pre Council and by the National Trust for Scotland fabricated houses). The Minister will also, and a host of other people and organisations. when requested, prepare housing sites and erect Colonel A. G. Duncan (Perth and Kinross) prefabricated or other houses on behalf of seconding the motion, asked the Government to ocal authorities.” withdraw the scheme temporarily and go into The Bill empowers the Treasury to make the details on behalf of the people of Scotland. advances not exceeding £100 million, up to The question which the House had to decide was December 31st, 1947, for these purposes and whether Parliament or the Electricity Com the Ministry of Works will establish a fund for missioners should be paramount. dealing with these advances. Under Section 3 Mr. Cook (Dundee) considered that all the the Minister of Health can, in effect, purchase talk about amenity was so much balderdash. building materials and equipment from the It so often meant glens darkened and villages Minister of Works, paying the money for this desolate. purpose into the fund. Mr. A. Anderson (Motherwell) thought that “ Building materials ” are stated to include the Central Electricity Board had been most “ any product which, or a derivative of which, is maladroit in its conduct with local authorities capable of being used to form part of a building and other bodies. It had been dictatorial, non- or of any works preparatory or incidental to conciliatory, and tactless; if this had not been the provision of a building, or of being used the case a great deal of the opposition could for preserving or finishing a building or a part have been avoided. of a building, and including any structure Mr. Reid (Glasgow, Hillhead) was convinced ready for erection as a building or part of a that this was a good scheme and that its benefits building.” The terrp “ permanent equipment would much outweigh any possible damage. for buildings ” means “ any article which is Commander Galbraith (Glasgow, Pollok) intended to be provided for permanent enjoy said that in passing the Hydro-electric Develop ment with a particular building.” ment Act the House had believed that it would At a press conference last week the Director- operate for the benefit in large measure of the General of Housing Supplies (Mr. A. A. Highlands. The whole object of the present Saunders) gave some particulars of the Govern scheme was to provide electricity for the country ment’s intentions in the matter of the supply of at large and the interests of the Highlands were equipment for new houses. He said that of very secondary importance. about twenty Royal Ordnance factories would Mr. MacMillan (Western Isles) said he did not be devoted to the production of this equipment want to see women having to go out and cart but the bulk of it would be produced by private peat for fuel to cook their food. It was essential industry. When the immediate requirements that the Highlands and the islands should have had been met it might be possible to take small electricity. private orders and to export standardised Mr. Buchanan, Under Secretary for Scotland, components. could not understand why Scottish members Standardisation was one of the principal ,were constantly calling for exports should aims of the scheme and the Ministry of Fuel criticise the export of electricity to England. and Power had been consulted with regard to the As a matter of fact, however, he did not think standardisation of cookers and other fuel the Board would require to export a single unit consuming apparatus. Among the classes of because by the time the scheme came into goods which would be produced were electrical operation the demand for electricity in Scotland wiring accessories, switches and fuses, cookers, itself would be such as to exhaust the supply. fires, immersion heaters, motors, wash-boilers If this scheme were abandoned the Secretary and auxiliary water heaters. Gas equipment was for Scotland would be compelled to resign and also to come under the scheme. the Government would stand or fall by it. N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 741 r. Uailin^lon (o Retire Fifty Years in the Electrical Industry
^kN E of the most onerous and exacting jobs in in 1932 became joint director with the late the electrical industry is the directorship of Mr. D. N. Dunlop; when Mr. Dunlop died in the British Electrical and Allied Manufacturers’ 1935 Mr. Watlington was appointed sole Association and it is one which only a man of director. Since that time there has been a high qualities and unremitting energy can steady growth in the scope and intensity of the adequately fill. It is generally agreed that Association’s activities, and during the war, Mr. V. Watlington possesses these qualifications particularly, Mr. Watlington and his colleagues and there will be much regret that he has have had to shoulder added responsibilities. decided to retire some But the way in which these have been handled time next year. has increased the regard of the industry for the Mr. Wellington's con Association and has greatly facilitated the work nection with the elec of the Government Departments concerned trical industry began with electrical production and export. about fifty years ago Mr. Watlington became an associate of the when, after education Institution of Electrical Engineers in 1899 and at the Bedford Gram has been a member since 1917; he has served mar School and the on the I.E.E. Council and Finance Committee. Central Technical For his services in connection with the produc College (he is an tion of flying boats during the 1914-18 war he A.C.G.I.) he joined was awarded the M.B.E. and he was one of the Blackwell & Co., British delegates to the Berlin World Power specialists in the design Conference in 1930. and construction of Mr. V. W atlington All sections of the electrical industry will wish electric tramways, in Mr. Watlington many years of well-deserved 1896. Ten years later he set up on his own rest after his long period of valuable service. account as Watlington & Co., in the supply of tramway materials; the business was successful and was acquired in 1911 by Dick, Kerr & Co., All-welded Tanker the leading concern in traction engineering, who had offered him the position of sales manager. Hundred-Ton Assemblies He retained this position with the English f|7H E principal characteristics of an all- Electric Co., Ltd., when it was formed in 1919 welded oil tanker named 5.5. P h o e n ix , to merge Dick, Kerr and other concerns and, in which is claimed to have a larger carrying 1925 he was appointed managing director of the capacity than any other ship of its class con English Electric Co. structed in that way, are described in a paper For many years Mr. Watlington had taken submitted by Mr. W. A. S t e w a r t (Sir Joseph a keen interest in the work of the B.E.A.M.A.; W. Isherwood & Co., Ltd.) to the North-East he was an active member of nearly every Coast Institution of Engineers and Shipbuilders. important section and chairman of several The vessel is owned by the National Bulk committees, including the Revising Committee Carriers, Inc., of New York, and was built at which is responsible to the Council for the the Welding Shipyards, Inc.. of Norfolk, accuracy of all legal texts. He became a Virginia, after experiments with models made member of the Council in 1925 and was elected to Isherwood design had been conducted at the chairman in 1929. In the same year he was National Physical Laboratory, Teddington. appointed a member of the Advisory Panel of The tanker has a longitudinal framing system the D.O.T. Overseas Trade Development with corrugated plates on the bulkheads and C ouncil. spliced brackets throughout the tank space. It was during his period as chairman that the Large assemblies weighing up to 100 tons were British Empire Trade Exhibition was held in prefabricated complete on the ground and lifted Buenos Aires. The electrical industry played into position. The only welding that was done an important part in this and Mr. Watlington within the ship was the actual joining-up of went to Argentina as chairman of the F.B.I. those assemblies. Construction proceeded from delegation. One result of this visit was that he the engine room bulkhead forward and aft realised the importance of strengthening the simultaneously. contacts between this country and Argentina The vessel is 541 ft. long, 80 ft. broad and and it was largely due to him that the decision 40 ft. deep, of 23,600 tons deadweight and was taken to appoint an “ electrical ambas 29,270 tons displacement. She has carried a sador " in Buenos Aires, a position to which cargo equivalent to 183,650 barrels of oil, or Mr. H. C. Siddeley was appointed. 21,300 tons. The single propulsion shaft is Mr. Watlington continued to devote more driven through double reduction gearing by and more time to the work of B.E.A.M.A. and steam turbines of 13,200 SHP. 7 4 2 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945 PERSONAL and SOCIAL News of Men and Women of the Industry tMIHE Central Electricity Board announces was responsible for the restoration and organisa that Mr. V. A. Pask will relinquish his present tion of electricity supplies throughout Italy. post of district manager for the Mid-East England and North- On Tuesday last week the Newbury central East England Grid office staff of the Wessex Electricity Co., Scheme Areas at the end together with the sixteen area managers bade of the year in order to farewell to Mr. H. B. Style, the general manager. take up a new appoint Mr. Style, after three years with the company, ment at head office as is leaving shortly to take up an important personal assistant to the appointment in South America. In the after general manager. The noon there was a gathering in the club-house Board has appointed under the chairmanship of Mr. L. H. Parkinson, assistant secretary. Mr. Bushroyd, the Oxford Mr. W. M. Lapper, operation engineer for area manager, presented Mr. Style, on behalf of North-West England the company’s staff, with a Georgian silver and North Wales, to coffee pot and book of autographs, whilst succeed Mr. Pask. Miss Marshall presented Mrs. Style with a silver jewel casket. Mr. Brandreth, Mr. Style’s Mr. Pask, who is a M r. V. A. Pask native of Manchester, predecessor, wished Mr. Style every success received his early education and engineering in his new position. In the evening, Mr. Style training in Preston and afterwards held appoint entertained the senior staff at the Chequers ments at Paisley, Hull and Bootle before Hotel, Newbury. Mr. Style’s successor is becoming deputy general manager and engineer Mr. R. R. B. Brown, who was deputy general of the Newcastle and District undertaking. manager up to the time he joined the Forces. Subsequently he was for eight years city electrical Mr. S. 0. Grant, who has just returned to the engineer of Norwich, and he joined the Central Rheostatic Co., Ltd., from the Admiralty, is Board in 1940 as district manager for Mid-East now resident engineer at the company’s London England. Four years later he also took over office for the London area, East Anglia and the managership of North-East England when Kent. Mr. H. R. Henderson is leaving London the two areas were combined for administrative to take charge of an area extending from the purposes. West of London to the West of England. Mr. Lapper, who was born at Stoke-on-Trent in 1893, was educated at the Stoke High School The photograph which we reproduce was and Technical College. After experience with the sent to us by Mr. T. H. Carr, electrical Potteries Electric Traction Co., he held gener engineer and manager; it was taken at a recent ating station appointments at Perth, Falkirk, meeting of the generation and power station
M r. T. H. Carr (Bradford) with members of his staff.
Doncaster and Wolverhampton, having been superintendents at the Valley power station for five years station superintendent at Wolver of the Bradford Electricity Department. hampton and in charge of the West Midlands main control centre before joining the Central Mr. T. A. Robinson, station engineer, Dal- Board’s staff in 1934 as an assistant operation marnock power station, has retired after forty engineer for Central England. Later he went years’ service, Mr. A. C. Lindsay, assistant to the Board’s Manchester office and became station engineer, succeeding him at a salary operation engineer for North-West England of £833 per annum. and North Wales. Mr. Lapper was “ lent ” by Professor B. F. J. Schonland has been awarded the Board to the Allied Control Commission the Hughes Medal by the Royal Society for his for Italy and, after the landings in 1943, he distinguished work on atmospheric electricity took charge of the Public Utilities Division and and other physical researches. N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 7 4 3
The Minister of Labour and National Service Rawtenstall Corporation Electricity Com has nominated Mr. H. E. Chasteney, one of mittee recommends the appointment of Mr. H.M. Deputy Chief Inspectors of Factories, to Thomas Stockwell as electrical engineer at a be Chief Inspector in succession to Sir Wilfrid salary of £750 per annum. Garrett, who is retiring from the service in Gravesend Town Council advertises in this January next. issue, for a borough electrical engineer (£1,422) We reproduce herewith photographs of to succeed Mr. F. S. Naylor who has been Mr. W. Horsfall, Mr. F. Lonsdale, Mr. R. E. appointed borough electrical engineer of Isling Robinson and Mr. W. H. Williams, who, as we ton. The Fleston and Isleworth Council is
Mr. W. Horsfall Mr. F. Lonsdale Mr. R. E. Robinson Mr. W . H. Williams announced last week, have just been appointed seeking a deputy borough electrical engineer and directors of the General Electric Co., Ltd. manager (salary £600 plus bonus—at present Dr. Abdel Aziz Bey Ahmed, chairman of the abbut £60 and motor-car allowance). Hydro-Electric Power Commission in Cairo, Major Stanley M. Mohr, managing director of accompanied by another member of the Com the Micanite & Insulators Co., Ltd., has been mission, Mustafa Fathy Bey, has arrived in elected president of the Institute of the Plastics London for discussions on specifications shortly Industry for 1945-1946. Major Mohr was to be issued for the hydro-electric plant at chairman of the British Plastics Federation from Aswan. 1939 until 1944. Squadron-Leader H. Clements has been Mr. T. Whitehouse, deputy electrical engineer released from the Royal Air Force to join at Mansfield, has been appointed borough Silentbloc, Ltd., and its subsidiary, the Andre electrical engineer of Weymouth in succession Rubber Co., Ltd. He will be concerned with to Mr. G. Nicholson, technical and commercial developments of the who is retiring. Mr. companies’ products in the North of England Whitehouse is a Wolver and Scotland. hampton man and was Mr. C. G. M orley New, Electricity C om m issioner, educated at the local is one of the members of a goodwill mission technical college and in which is going to Egypt under the auspices of the Corporation Elec the Department of Overseas Trade. tricity Department, be coming an engineering Sir Edward Appleton, F.R.S., has been assistant in that depart appointed Rede Lecturer for 1946 by the Vice- ment in 1931. Four Chancellor of Cambridge University. years later he trans Sir Thomas Gardiner, Director-General of the ferred to Eastbourne in Post Office, is retiring at the end of the year. a similar capacity, being He will be succeeded by Sir Raymond Birchall, appointed to the Mans M r. T. Whitehouse who has been Deputy Director-General since field post in 1938. He 1936. is an associate member of the Institution of Mr. J. M. Shannon, of the Glasgow branch Electrical Engineers. of the Simplex Electric Co., Ltd., has been appointed manager of that branch. Mr. Shannon, who has been with the Simplex Co- Obituary for eighteen years, has just returned from six Mr. F. C. Raphael.— We report with regret the years’ service in the R.E.M.E. having spent a death on November 17th of Mr. Francis Charles considerable time overseas; he was twice Raphael, consulting electrical engineer and a mentioned in despatches. Mr. H. G. Barrett well-known writer on electrical subjects. Mr. remains manager for Scotland and is respon Raphael, who was seventy-four years of age, sible for th e general direction of the Glasgow was educated at the Central Technical College and E d in b u r g h branches. and after serving with various cable manu Ef 7 4 4 E l e c t r i c a l R e v ie w N o v e m b e r 23. 1945 facturers and engineering concerns, was for a Police Radio tim e editor o f the Electrician and, later, E l e c t r i c a l Engineering. There followed a period with the TBtHE initial development of a method of Edison Swan Electric Co., and in 1921 Mr. -*■ increasing the range, or improving the Raphael set up a consulting practice and acted coverage, of very-high-frequency communica for a number of public institutions. He was a tion systems of the type used by the police member of the Institution of Electrical Engineers force is described in a paper read by Mr. J. R. and of the Association of Consulting Engineers. B r i n k le y (Directorate of Communications. Mr. W. Merrilees.—We regret to report that Home Office) before the I.E.E. Radio Section. Mr. W. Merrilees, manager of the Newcastle The system is based on the simultaneous branch of W. T. Henley’s Telegraph Works amplitude modulation of a number of carriers Co., Ltd., died suddenly on November 12th so closely spaced in frequency as to be within after a short illness. The interment took place the band-width of the receiver, without producing on November 15th at Benton Parish Church, audible interaction of any importance. Two- Northumberland. Mr. Merrilees, who was carrier schemes employing separate transmitters fifty-four years of age, joined Henley’s in 1914 at the same site have improved the coverage, as a clerk in the Newcastle office. He was while two or three carrier schemes utilising appointed traveller for the Newcastle area in separate sites have greatly increased the range. 1932, and in 1936 became branch manager. The wider band made available by multi-carrier amplitude modulation is used for circuit im Mr. John Ellson. -The funeral look place at provement. The extra width is employed to Leicester this week of Mr. John Ellson, who accommodate the common modulation of retired in May, 1943, aged sixty-five, from the several transmitters and thus increase the position of assistant general manager of the signal/noise ratios, or enlarge the area covered. Leicester City Transport Department after The apparatus referred to in the paper was forty-two years’ service with the undertaking. designed and manufactured by the General He acted as general manager following the Electric Co., Ltd. The site-testing work was retirement of Mr. H. Pool and the departure of initially done by the Radio Department of the Mr. Ben England. G.P.O. on behalf of the Directorate of Com Lady Walker. We regret to learn that Lady munications, Home Office, which later under (Priscilla) Walker, wife of Alderman Sir William took its own multi-station investigations. Walker, president of the I.M.E.A., died at her home, Burn Banks, Penrith, last week. Mr. A. E. Logsdon, F.C.I.S., whose death is Engineering and the British reported, was managing director and secretary of the Farnham Gas & Electricity Co. Council CCOMPANYING the Report of the British Council for the year ended March 31st, I.E.E. Liverpool Dinner 1945, is an outline of the work of its Science Department. In this an account is given of the A FURTHER account of the good work activities of the Engineering Panel (chairman. done by electrical engineers during the Sir William Larke) in the training of overseas war was given by Dr. P. Dunsheath, President students. These include the award of scholar of the I.E.E., at the annual dinner of the Mersey ships, mostly post-graduate, consultation with and North Wales Centre of the Institution authorities abroad on the appointment of at Liverpool last Monday. Dr. Dunsheath in British professors, on systems of technical the course of his remarks mentioned that 30 education in various countries and on the million valves had been produced for the academic and practical training of foreign Services in the D-day year and that the Post students in the United Kingdom. In this Office had established stations to interfere with connection Professor S. J. Davies (director and the enemy's communications system with the secretary of the Panel) in two tours in the tanks advancing on Dunkirk. He felt that Middle East advised on the lay-out and equip electrical engineers could fairly accept the ment of laboratories for several projected tribute paid to them by Alderman A. Critchley, engineering schools and the provision of British chairman of the Liverpool Electricity Committee. text-books and technical periodicals at colleges The Lord Mayor of Liverpool (Alderman L. and institutes. The opportunity was taken to Hogan), responding to a toast proposed by inculcate a proper understanding of the engineer Mr. J. Eccles, the Liverpool city electrical ing qualifications granted by the major British engineer and manager, said that whatever engineering institutions. happened with regard to political control the Other services covered the distribution of electricity supply industry would continue to films, the provision of technical articles, the advance. publication in foreign languages of the S c ie n c e Mr. W. K. Brasher, secretary of the l.E.E., in B r it a in series of booklets, which include congratulated the Centre on being the first biographies of eminent British engineers, and to hold a post-war dinner. Mr. J. O. Knowles, the dissemination and translatioft of British chairman of the Centre, presided. Standards. N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 745 CORRESPONDENCE: Letters should bear the writers' names and addresses, not necessarily for publication. Responsibility cannot he accepted for correspondents' opinions.
Supplies to Farms an armature winder who can hold his job in a | HAVE read with great interest your repair shop, and one employed by a manu *• articles pn rural electrification that have facturer, and so they sail gaily into the business and call up these key men (to use a sadly appeared from time to time, especially those overworked phrase), and tell us that we can recently written on the Carlisle area and Ontario. 1 have not seen any reference to gel replacements from the Forces, when they transformer losses in these schemes which are demobilised. We have not found that training a man for presumably, in many cases, call for separate transformers for each fatm. Are these losses six years to kill with his bare hands has made considered to be a serious item, and how a marked improvement in his capabilities as an armature winder. are they met ? I have had in mind a 15 per cent, tariff T yne & W ear E lec. Co ., Lt d . East Boldon, Rod. J. Morgan, increase for our sparsely populated areas, but this does not by any means cover the Co. Durham. Managing Director. losses. I have recently completed a survey Motor Protection of an extension of our lines to serve 336 farms, and find that while the capital cost, ■N connection with Messrs. Shipton and £72,000, is a big enough problem, the losses Shreeve’s letter in your issue of November are a far greater one. 2nd, I would like to emphasise that B.S. 142 We shall require 162 new transform ers does not cater properly for the thermal (we are fortunate in averaging two farms per overload relay. In the new relay described transformer), 70 miles of high-voltage trans in your issue of July 13th, the point they mission and 50 miles of lower-voltage lines. make that the relay characteristic should The calculated annual transformer losses are match the motor, has been expressly covered, 441,000 kWh and the line losses 109,000 and 1 would strongly endorse their views. kWh giving a total of 550,000 kWh, With regard to single-phasing, it is not representing a total cost to us of £2,300 or necessary to connect the new relay inside £6 17s. 6d. per consumer. These losses go the delta, and it is often not convenient to on for ever, and cannot be met, as capital do so with direct-on started motors. In the can be to some extent, by contribution from relay described this has been made un the consumer. necessary as positive protection is given to In this undertaking the present losses cost the motor against single-phasing at all loads us 25s. per consumer, and we are therefore by comparing the difference in current in the hesitant to reach out to the farms on a large three lines using three compensated normal scale and thus endanger the stability of the ised spirals separately heated and a system undertaking as a whole. What answer can of substantial contacts as described in the we give the farmers who are making electricity above article. supplies to their holdings a major political London, S. W.\. L. B. S. G o ld s. issue in the Island ? Consumers’ Meters Douglas. L. D o u g l a s s , Engineer and Secretary, ■^"OUR comments on the “ low esteem in Isle of Man Electricity Board. which testing of consumers’ meters is sometimes held ” deserve attention. Calling-up of Skilled Men A neighbour of mine with a slot meter EB1HE correspondence which has recently received a letter from his supplier statiifg :— appeared in the Electrical Review, o n “ You are in default 3s. 0^d. . . . if you have this subject, has been both interesting and not paid this within a week your supply will timely. The matter was recently raised in be cut off.” I advised sending in a reply that the Commons, and the reply given was that Section 22 of the 1882 Act, provides for up to the Man Power Board knew more about the five years’ penal servitude for interference matter than anyone else, so had to be trusted. with a supply; and an offer to answer a But, apparently, the trouble is that these summons to be issued by supplier. In Ministries do not know the difference between preparation for the summons, I examined 746 E l e c t r i c a l R e v ie w N o v e m b e r 2 3 , 1 9 4 5 two slot meters in other homes and found Services in Buildings the first had delivered (on its dial) 21 kWh less than the coins put in during the past year, and Code of Practice Draft the second had delivered 9 kWh less than paid T P HE Codes of Practice Committee has issued for in six months. for comment draft Chapter VII, Services The supplier declined to make adjustments (CP(B)502), of the Code of Functional Require of the overcharges more than three months ments of Buildings. (British Standards Institu old. tion, 28, Victoria Street, S.W.I., 2s. net.) This Consumers should check coins put in document contains recommendations for water against units consumed to ensure getting supply, cooking installations, refrigeration, laundering, telecommunications, sanitation and value for money. “ M.I.E.E.” drainage, and sewage and refuse disposal. Trolley-Buses in South America For non-industrial purposes the minimum consumption of water per head in gal. per day ■ N the Electrical Review of October 19th, is taken as: Flats, 20; houses, 30; hostels, 20; it was reported that a trolley-bus system hotels, 20 and upwards; hospitals (including to be installed in Sao Paulo would be the laundry), per bed, 30 and upwards, staff on first to operate in South America. Whilst duty, 20, nurses’ home and medical quarters, this statement may be true of Brazil, you may 20; schools, day 10, boarding 30; offices, 10; factories, 10; restaurants, 1 j and upwards (per be interested to know that Venezuela can m eal). claim to have had a trolley-bus system in Normal temperatures for domestic hot water operation for the past eight years. are stated as follows: Wash basins and baths, This company operates an extensive tram 110 deg. F. minimum; kitchen and scullery way system in Caracas, Venezuela, and on sink, 140 deg. F. minimum; household laundry- July 9th, 1937, a trolley-bus service was put work, maximum 212 deg. F. Minimum rates into operation. From time to time the system of flow of hot water in gal. per min. at taps in has been extended. storage installations should be: Bath, 5; London, W.C.2. United Electric Tramways sink, 4; basin, Ijr; shower nozzle, 1A For a family of four 160 to 250 gal. of hot Company of Caracas, Ltd. water per week at 140 deg. F. is needed, v i z . : S. M. W rig h t, Secretary. Bath, 70 to 100 gal.; basin, 20 to 40 gal.; sink and other purposes, 70 to 100 gal. In houses Registration of Contractors and flats, in order to allow individual choice in ’» » ’HILST I am in complete agreement the type of cooking appliances and fuel, con with the views of Mr. Alex. Milne, I nections should be provided at the construction consider that the whole of the trouble lies in stage with both gas and electric mains, even though the appliance chosen may use solid or the fact that all types of electrical material liquid fuel. Space should be provided for a can be purchased in chain stores, retail shops refrigerator of 3-cu. ft. capacity in residences and also from many electrical contractors. up to the three-bedroom type. Until electrical work carried out by amateurs is prohibited, we shall still have the present Spacing of Cables jumble in the electrical contracting industry. A steam supply for public kitchens providing Gorton, Manchester. W i l l l a m J. R i g g . for less than 500 persons is not recommended, unless readily available from mains serving other I N my opinion the standard of installations purposes. Working pressure should not exceed would improve if the inspector was 15 lb. per sq. in., reduced to 5 lb. per sq. in. granted his proper status and remuneration, for wet steam ovens. Where telecommunication and inspection during progress was enforced. cables are led into a building at the same point It would also attract higher skilled tech as electricity cables and gas and water pipes, nicians to the job. at least 2 in. should be allowed between them An advertisement in a recent issue of your and any of the other services by the provision periodical, where an “ installation inspector ” of a fillet. Where high-voltage cables run was required, offered the munificent sum of adjacent to telecommunication cables, a separa tion in air of 12 in. is recommended, with 6 in. 26-Id. per hour, in the region of 10s. per as a minimum; otherwise separation should be week less than the wireman. I understand effected by means of a layer of concrete at least the N.J.I.C. fixes these wages and it appears 2 in. thick. to be an “ operative-minded ” body or it would not risk such comparisons. i R ailw ay Electrified. — The newly If the contracting industry is in such a electrified line of the Central Brazil Railway state as recent letters suggest, here is where on the Campo Grande to Santa Cruz section was inaugurated by the President of the Republic a start could be made. “ Contractor.” on October 14th.— Reuter's Trade Service. N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 747 New Lighting Code Variations from the Original I.E.S. Document HE well-known code of the Illuminating professionally engaged in planning and T Engineering Society, which has hitherto installing lighting, whose experience and been chiefly concerned with values of skill will usually be required in applying artificial light, has been thoroughly revised its recommendations. It will also guide the and considerably expanded. The new version, consumer in formulating his lighting require which is issued under the title of “ I.E.S. ments, or he may require compliance with it Code of Practice for Good Lighting of as a condition of any contract given for Building Interiors,” represents departures in lighting. at least three distinct respects. First, it The Code defines “ good lighting ” in now deals to some extent with both natural terms of amenity and utility. Lighting is as well as artificial lighting. Secondly, it good if it is suitable, in quality and quantity, affords an insight into the basis on which both for creating agreeable environmental illumination values are determined and brightness and for permitting high efficiency illustrates with the aid of a special chart in seeing what it is essential should be seen how such values should increase geometrically in any particular case. Informative diagrams with the apparent size of the object to be seen, included in the Code refer to the duration of duly taking into account the contrasts adequate daylight throughout the year, to involved. Thirdly, it removes what has long the chief characteristics of different systems been felt to be .a weakness of the original of lighting, to the permissible brightness of document, by including recommendations in lighting units within specified angles of view, respect of the quality of the light to be and to the determination of recommended provided in addition to its intensity, values of illumination according to the nature incidentally now specified in “ lumens per of the “ visual task ” with the aid of two square foot ” in preference to “ foot-candles.” charts respectively tabulating values of day There are also notes on the assessment of light factors and artificial lighting. These the amount of light required and on the use values form a geometric series, such that, by of illumination charts together with a six steps, the illumination is multiplied schedule of pre-determined values recom tenfold. Another important section deals mended for many specified visual tasks. with the quality of lighting and, in particular, The new code was discussed at this month’s with the avoidance of glare. The provisions meeting of the I.E.S. at which Mr. H. C. are based on the results of numerous scientific Weston (president) explained that it is investigations and, for this reason, the Code primarily intended for the guidance of those is an authoritative document. *‘In a Good Light'9 Joint A.S.E.E.—I.E.I.C. Meeting HIS year’s joint annual meeting of the but welcomed Sir John Kennedy, a past- T Association of Supervising Electrical president of both bodies, in his place, and Engineers and the Institution of Engineers-in- Mr. E. R. Wilkinson, president of the Charge was the twentieth of the series and A.S.E.E. Mr. Winstanley mentioned that as it was the first post-war meeting the General this year the I.E.I.C. celebrated its fiftieth Electric Co., Ltd., invited members to birthday. He read a list of the subjects celebrate it at a Victory luncheon. This was which had been presented at the previous held at the Connaught Rooms on Saturday meetings to show the wide variety of interests last. Mr. F. Winstanley, a director of the covered. G.E.C., took the chair and there were about In his reply Mr. Wilkinson spoke of the 300 present. continuity of the meetings throughout the Following the loyal toast Mr. Winstanley war and emphasised the great opportunities proposed the toast of “ The Association and now presented to the electrical industry. the Institution.” He expressed regret that These lay largely in the modernisation of Sir Alexander Gibb, the president of other industries which was essential if we the I.E.I.C. was unable to be present were to compete in world markets. He 748 E l e c t r i c a l R e v i e w N o v e m b e r 23, 1945
referred to the high quality of the membership stating that the lighting engineer’s job was of the two organisations and to the Swann not merely to specify the amount and position Diploma which, he said, was not confined to of lighting: he was concerned with the back members of the A.S.E.E. ground or surroundings too, and particularly Sir John Kennedy, who also responded to with colour. The subject of the lecture was the toast, thanked the G.E.C. for the help quality not quantity and he detailed the it had afforded the two bodies. From its physical and visual factors which entered great resources it had been able to provide into the design of an installation. Physical first-class lecturers on many subjects. factors included texture and finish of Referring to the activities of the members illuminated objects, colour, elevation and of the two organisations he quoted a saying operative processes. Under the heading of the late Lord Hirst that full pleasure “ visual ” there fell such matters as shading, could only be gained from work which colour contrast, obstruction shadow, etc. was of service to mankind. By means of an excellent series of lantern After the luncheon Mr. R. O. Ackerley, slides Mr. Ackerley demonstrated each point manager of the Illuminating Engineering of his remarks and the interest which he Department of the G.E.C. gave a lecture on aroused was reflected in the subsequent “ Illuminating Engineering: or Putting Things questions put to him by members of his in a Good Light.” Mr. Ackerley began by audience.
Rural Electricity Supplies E.D.A. Advisory Committee Starts W ork WT is announced that Mr. H. W. Grimmitt undertakings should be encouraged to formulate (Electricity Commission) has been appointed schemes for supply to undeveloped rural areas. chairman of the Rural Electrification Advisory The sub-committee is to prepare information Committee, recently set up by the British advising how the areas should be zoned where Electrical Development Association. Professor not fully electrified, giving the basis of probable H. G. Robinson (principal, Midland Agricultural revenue for different sizes and classes of farms College, Sutton Bonnington) has been elected and other consumers and other concrete vice-chairman. Membership of the Committee suggestions for development. consists of representatives of the Ministry of Mr. V. A. H. Clements (North-Eastern Agriculture and Fisheries, the Royal Agricultural Electric Supply Co., Ltd.) was appointed Society of England, the National Farmers’ chairman and Mr. F. J. Elliott (Wolverhampton Union, the Milk Marketing Board, the British Electricity Department) vice-chairman of the Dairy Farmers’ Association, the National Publicity and Exhibitions Sub-Committee. This Poultry Farmers’ Association, the Institution of sub-committee has agreed to produce two new British Agricultural Engineers, the Electricity publications. One is intended for distribution Commission, the Electrical Contractors’ Asso to the inhabitants of rural areas without a ciation, electricity supply undertakings, and supply of electricity, showing, by practical E.D.A. area committees. examples, how by a community effort the At the first meeting of the Policy Sub-Com supply authority can be assisted in undertaking mittee, Mr. Grimmitt was appointed chairman extensions of mains. The second publication and Mr. S. E. Britton (Chester Electricity will be a comprehensive handbook on all farm Department) vice-chairman. The sub applications of electricity for distribution to committee decided to ask the Ministry of farmers who already have an electricity supply. Agriculture to give a definition of what con The Technical Sub-Committee appointed stitutes a “ farm.” It also expressed the Mr. C. A. Cameron Brown (Edmundsons opinion that the electricity supply industry Electricity Corporation, Ltd.) and Mr. F. E. generally was agreed that electricity should be Rowland (General Electric Co., Ltd.) as its available in all parts of the country where it was chairman and vice-chairman. The sub practicable to develop an economic supply. committee agreed that practical advice on in Mr. Grimmitt pointed out that, although stallation, lay-out and utilisation of electricity development had been held up by the war, on farms should be given to supply authorities, some 2,000 to 3,000 farms a year had been contractors and farmers, by means of illustrated connected during the war years. The total of talks, booklets, and contributions to the N.F.U. 290,000 farms in England and Wales included journal. It was also agreed that architects many agricultural holdings with no houses, but required guidance in the designing of new farm of that total 25 per cent, had been connected. buildings so that full advantage could be taken Of the farms of over 1,000 acres, 64 per cent, of the possibilities of electric power for labour had been connected. It was agreed that supply saving in horizontal and vertical transport. N o v e m b e r 23, 1945 E l e c t r i c a l R e v i e w 749 Grid Improvements Comments on Central Board’s Practice
"•■DDIFIED design and changes in Supply Dept.) said that the author had ■ construction of overhead power lines rather minimised the disadvantages of s.c.a. forming the gnd system were discussed at conductors; from inquiries he bad made a meeting of the Transmission Section of the some time ago it seemed that the consensus Institution of Electrical Engineers, following of opinion was very much against them. the reading of the paper on the subject by The only advantage at the moment was in Mr. W. J. Nicholls (Electrical Review, price, but that was probably due to the price November 16th, p. 710). control of copper. There was more in the M r. E. Ambrose (Highfield & Roger story regarding insulators than had been told Smith), opening the discussion, remarked in the paper. Glass was coming into very that he had hoped to hear why in some areas much more popular favour than might be the towers were constructed of copper-bearing inferred and he was under the impression steel whereas the majority of the others were that the C.E.B. was carrying out replace plain mild steel galvanised. The original ments with glass insulators. conductors were supplied in drum lengths, which meant that frequently it was necessary' Disparity in Prices to have mid-span joints. Latterly, however, Mr. E. C. Neate (Riley & Neate, Ltd.) this had been avoided. suggested that the statement in the paper that in the early days troubles had been Freedom of Information experienced with cone-type joints due to bad M r. R . W . M ountain (Kennedy & workmanship should be withdrawn in justice Donkin), who represented the Structural to the men concerned. He drew attention Building Engineering Division of the Institu to the great disparity between the prices of tion of Civil Engineers (members of which various conductors. At present a single were welcomed to the meeting), said a great 0-175 sq. in. steel core aluminium conductor debt was owing to the C.E.B. for the manner cost £162 per mile, a corresponding cadmium- in which it allowed papers to be read on all copper conductor cost £216 and a hard- branches of its work, a practice that had drawn copper conductor only £143 per mile. enabled this country to establish a level of Provided difficulties of sag and spacing could design which had already been made use of be overcome, the cost of an ordinary line in other countries. With reference to having copper conductor would be much corrosion and alternative conductor materials, cheaper than the two alternatives adopted he asked if consideration had been given to by the Board for 33- and 66-kV grid con aluminium alloys such as that used in struction. With copper conductors vibration Switzerland some fifteen years ago. He also troubles were almost entirely eliminated, inquired whether experience of the double line joints were simple and reliable and earth wire since 1938 had shown that type corrosion troubles, which appeared to loom to afford improved protection against light large when any composite conductor was ning. used, were obviated. Mr. H. W. Grimmitt (Electricity Com Vibration and Icing mission) said that the additional cost of having conductors of the right length to M r. P. J. Ryle (Merz & McLellan) avoid mid-span joints would have been maintained that conductors vijprated for 95 more than counterbalanced by the money per cent, of their life, but whether that involved in the use of mid-span joints. He mattered or not depended on what was considered that there must be some tension called “ every-day ” tension. For instance, at which vibration did not arise. For 33- the ice and wind equivalent tension of and 66-kV lines wood poles were far superior 3,450 lb. in still air at 40 deg. F. only applied to the lavish towers that had been used in to the normal 900-ft. span and it rose sharply the past ; wood lasted for sixty years. with shorter spans; for 500-ft. spans the There was a tendency in America to revert figure was 5,000 lb. Regarding schemes for to wooden poles for such lines. circulating current to melt ice, he pointed M r . D . P. Sayers (Birmingham Electric out that if ice could not be kept off the earth 750 E l e c t r i c a l R e v i e w N o v e m b e r 23, 1945 conductor it would sag differently from the temperatures. The tendency after about main conductors and swing about non- fourteen days was for growth to cease. synchronously. M r. N icholls, in reply, said the Board was Mr. G. R. M cCullagh (J. L. Eve Con investigating the possibilities of aluminium struction Co., Ltd.) said that the author’s alloys for conductors, but the prospects were claim that there had been no foundation not very hopeful-at the moment. There was failures seemed to suggest some relaxation as yet no positive experience that the double of the regulations for the less important grid earth wire was no good. There had been a lines. Mr. N. E. P. Harris (Bullers, Ltd.) weight saving of some 10 per cent, on some commented on the manufacture of small lines compared with some of the earlier components. types. He agreed that wood poles were M r. C. H. E. Ridpath (British Aluminium cheap for certain lines. The Board was Co.) suggested consideration of the use of using glass insulators in considerable two dampers per span. He was not satisfied quantities. As to the condition of galvanised that at normal temperature, up to 100 deg. C., steel towers after fifteen years, well over 50 there was any “ flow ” under pressure in per cent, had reasonably good galvanising aluminium conductor joints. The oxide film left. In the case of about another 15 per on the conductor had a natural thickness of cent., in industrial areas, the galvanising the order of one-millionth of a centimetre was not good at the moment and their life and, while he agreed that at high temperature in those situations was about ten years; in the film would grow to a thickness which very bad areas it was less. He could not would become insulating, it was wrong to agree that the regulations for foundations suppose that this would happen at normal should be eased. Discovery of X-Rays Celebration of Fiftieth Anniversary NE of the series of meetings and lectures cent, of the incident X-radiation was absorbed O arranged this month by a number of by the photographic emulsion. societies in celebration of the fiftieth anni Past and present industrial X-ray analysis versary of the discovery by Röntgen of was contrasted by Mr. H. P. Rooksby X-rays took place at the Institution of Elec (G.E.C.) who represented the Crystal Analysis trical Engineers on November 10th, Dr. P. Group of the Institute of Physics. He Dunsheath presiding, when four speakers described ionisation spectrometers in some dealt largely with historical aspects. detail and referred to this type of instrument The evolution of equipment for generating as an alternative to the photographic film. energy at high voltage for the excitation of The growth of industrial radiography was X-ray tubes was outlined by Dr. C. C. described by Mr. W. J. W iltshire (Research Paterson (research director, G.E.C.) who Department, Woolwich Arsenal) who repre referred also to interlocking systems of control sented the Industrial Radiology Group of the intended to prevent damage to the equipment Institute of Physics. Nearly 50 one-million and means of rendering the apparatus shock- volt sets were working in America, but only proof. Development in recent years had two in this country. They were fortunate in tended towards simplification of operation possessing a “ betatron ” electron accelerator and improvement of reliability. Freon at a at Woolwich (circular path, equivalent to pressure of about 55 lb. per sq. in. had been 4-5 million volts) but 20 million electron- used in America for insulating the tube and volts was being used in America. Thus the transformer ef a two-million volt outfit; limit of penetration had jumped from 5 to 100 lb. of that gas had approximately the 15 in. of steel and the useful limit of voltage same insulating properties as six tons of oil. had probably been reached. Recent develop The story of the development of photo ments were bringing non-photographic (elec graphic materials was told by D r . H. B a i n e s tronic) methods much nearer to practical (Royal Photographic Society) who stated that realisation. Cine-radiography had been still faster films were needed for both applied to molten metal flowing into foundry medical and industrial radiography. Per moulds while flash radiography with exposure haps the film of the future would enable times of the order of one-millionth of a screens to be dispensed with altogether, second had been especially valuable for the although at present only a fraction of one per study of explosive phenomena. » N o v e m b er 23, 1945 E l e c t r i c a l R e v ie w 751 COMMERCE and INDUSTRY Negotiations with Ministries. Union’s Post-War Plans.
Government and Engineering Industry Mr. W. C. Stevens, assistant general secretary, said that for the Government’s policy of full U lE reported in our issue of November 2nd employment to come to fruition it was necessary an announcement by the Prime Minister for the Union to see that the labour to carry out regarding the allocation of responsibilities the vast schemes of reconstruction was made between the Board of Trade and the combined available. Ministry of Supply and Aircraft Production. A motion to give rights of membership to Mr. Attlee said that the latter Ministry would rehabilitated men and civilian personnel was carry the primary Government responsibility carried, and the Union is to open a resettlement in the field of engineering. The Board of Trade section for the admission of men who have states that this means that trade organisations served in the Forces as electrical tradesmen. concerned with the engineering industry and Over ninety delegates and officials attending the individual firms in that industry will in due Conference were extended a civic welcome by course normally make their approaches to the the Lord Mayor of Cardiff (Alderman Walter R. Government through the Ministry instead of Wills) and were entertained to tea. through the Board of Trade to which a large part of the engineering industry has hitherto Custodian Payments looked for advice and assistance concerned with The Board of Trade has made an Order supplies to the civilian market. (S.R. & O. 1945 No. 1414) modifying in certain Before this change of procedure can become circumstances the arrangements for payment of effective, however, certain re-arrangements of money owed to residents and business people in inter-departmental machinery will be necessary. Organisations and firms in the industry should territory formerly occupied by the enemy. therefore continue until further notice to deal for the civilian side of their work with the Mr. Churchill’s Aeroplane departments which they have hitherto been Behind the announcement last week that Mr. accustomed to approach. Winston Churchill has returned to the United States the “ Skymaster ” aircraft presented to him by President Roosevelt lies the story of E.T.U. Changes British endeavour which produced the most Prospects of a great expansion in the electrical luxuriously appointed air-liner in the world. industry were referred to by Mr. E. W. Bussey, The aircraft was delivered as a shell and modified general secretary, at a Rules Revision Con and furnished in this country by L. A. Rumbold ference of the Electrical Trades Union held at & Co., Ltd., of Maida Vale, W. The whole of Cardiff last week when questions of membership the electrical equipment was manufactured by arising from the war and future development were discussed. Introducing the proposals of the Executive Council, Mr. Bussey said that the Union had many interests to safeguard. They had first o f all to ensure that the 25,000 members of the Union who were in the Forces got back their pre war jobs. Secondly, whilst protecting the interests of the members, they had to be fair to those who had rendered service within the industry during the war and endeavour to fit them in. if they desired to stay in the industry. Thirdly, there were large numbers of people in the Forces who had a high degree of electrical training and would have to be given an opportunity of exercising their skill in industry. Finally, there were those the General Electric Co., Ltd. and comprises who were being trained under the Govern a 5-75 cu. ft. refrigerator, cooker, hot-cupboard, ment’s rehabilitation schemes. Mr. Bussey felt electrically-heated lavatory seat, stewards’ that the Executive Council's proposals, with any luminous call system, cabin lighting fittings, minor modifications agreed to by the Conference, berth lighting fittings, illuminated shaving would enable the Union to deal with these mirror, hot and cold water system and fans. problems and go from strength to strength. The cooking* equipment was capable of pro 7 5 2 E l e c t r i c a l R e v ie w November 2 3 , 1 9 4 5
viding a four-course hot meal for twenty products, high-frequency generators for aircraft’ people. A 1-kW water boiler used primarily test sets for the M.A.P., special DC motors for boiling water for tea, etc., has a draw-off for the Fleet Air Arm, and a range of single capacity of two gallons. Water heaters for phase AC repulsion induction motors. the wash-basins provide half a gallon of water at 150 degrees F. in a period of approximately Fuel for Reconstruction ten minutes. Aluminium was used extensively in the construction of the electrical apparatus, During the war the Ministry of Fuel and which operated at 24 V. Power arranged a series of exhibitions, entitled “ Black Diamonds,” demonstrating how coal Oil-spray Collection was required for the production of armaments. Now, with the changed conditions, another Such serious inconvenience was caused in a exhibition called “ Other People’s Jobs ” has M.A.P. factory by the oil spray and vapour been prepared showing how, with coal urgently given off from eight thread-grinding machines, required for reconstruction of industry, fuel causing bus-bars and plug-in boxes to become saving is still as vital as ever. Twelve display units relating to various aspects of our eco n o m ic life include a life- sized photographic cut-out of the w orker concerned— the miner, engine-driver, merchant seaman, electrician, gas worker, farmer, steel worker, builder, industrial chemist, mill-hand, nurse and housewife. The display relating to the electrician shows by means of a dial how the various electrical services build up the load of the generating plant, with the sudden heating load of a cold spell causing ■a shut-down of the plant. A Grinding machine fitted with oil-spray filter separate working model depicts a pit-head with coal trucks feeding sources of danger, while the mist penetrated the the power station, gas and water works, coal whole building and works offices, that the merchant’s yard and consumers’ goods factory. factory inspector insisted upon preventive From these power, gas and water, and house measures being taken. General mechanical hold goods and food are supplied to a model ventilation did not alleviate the nuisance to any “ Perspex ” house. There is also a working appreciable extent, so Dallow, Lambert & Co., model of a colliery. The exhibition, which Ltd., of Leicester, designed an individual-type was opened by Mr. Shinwell, the Minister of extractor to be supported (as illustrated) above Fuel and Power, will be on view at the Army each grinding machine. Each is driven by a and Navy Stores, London, until to-morrow 4-HP motor and contains special impingement (November 24th) and will then be seen in type filters, the resulting precipitant draining about a dozen provincial towns. back into the oil tanks of the machines. Tests have shown that the oil extracted from Contract Price Adjustment Formulæ the atmosphere per week per machine amounts to 2-15 gallons, or 17-2 gallons per week for The latest figures for the B.E.A.M .A. contract the eight machines. No trace of oil was price adjustment formulæ are as follows:— discernible on a piece of clean linen suspended Rate of pay for adult male labour at November around the cleaned-air discharge pipe for 24 10th, 95s. (unchanged). Costs of material: the consecutive working hours. index figure for intermediate products last published by the Board of Trade on November Generation of Electricity in October 10th is 181-8 and is the figure for the month of October. This compares with 182-5 for Sep The Electricity Commissioners state that tem ber. 3,179 million kWh was generated by authorised electricity undertakers in Great Britain during Welding Developments October, as compared with the revised figure of 3,332 million kWh for the corresponding On November 29th and 30th, a symposium month of 1944, representing a decrease of 153 on the metallurgy of steel welding organised million kWh, or 4-6 per cent. by the British Welding Research Association During the first ten months of 1945 the will be held in London, when leading authorities total amount of electricity generated by will discuss current researches. The subjects to authorised undertakers was 30,138 million be covered are recent researches on the con kWh as compared with the revised figure of stitution and properties of weld metal; funda 31,014 million kWh for the corresponding mental investigations on cracking in the period of 1944, representing a decrease of 876 hardened zone in welded joints in alloy structural million kWh or 2-8 per cent. steels ; and initial researches on the viscosity of welding slags. Special War Products Plans are well advanced for dealing in a scientific manner with all questions connected An illustrated brochure has been prepared by with the application of welding to industry. Hopkinson Motors & Electric Co., Ltd., Property has been acquired near Cambridge describing its war work, which included, in by the British Welding Research Association addition to increased supplies .of its normal and special laboratories will be built there for 2 3 , 1 9 4 5 November E l e c t r i c a l R e v ie w 7 5 3
full-scale experiments on welded structures, economics of power production, administration, and other laboratories are being laid out in the management and the training of personnel. London area for metallurgical research. A discussion was opened by Mr. A. R. Bland- Experiments on welded steel structures are being ford, chief engineer and manager, Switchgear carried out under the direction of Professor Department, and a vote of thanks was proposed J. F. Baker, C am bridge. by Mr. J. E. Calverley, deputy chief engineer The Association’s director of research is to the company. Mr. A. R am say M oon, w ho as director-in- charge of the Advisory Service on Welding, World Power Conference Ministry of Supply, took a large part in the extension of welding in shipbuilding, structural The revival of the constituent national engineering, in the production of tanks, aircraft committees of the World Power Conference was and armaments. discussed at a two-day meeting of the Inter national Executive Council of the Conference Radio Control Orders Revoked which was held this week in London. Delegates attended from Great Britain, all the British The Postmaster-General has given notice of Dominions, India, Belgium, Denmark, France, new Orders which revoke a number of wartime Greece, Luxembourg, the Netherlands, Nether measures relating to the control of radio and lands East Indies, Poland, Sweden, Switzerland, allied apparatus. The Orders revoked are and the United States. The executive chairman S.R. & O. 1939 No. 1688, regulating the use of of the World Power Conference is Sir Harold wireless transmitters; the4 Wireless Telegraphy Hartley. (Possession of Transmitters) Order, 1943 (S.R. & O. 1943 No. 1219); Control of High- Cables in the “ Queen Elizabeth ” Frequency Apparatus Order, 1940 (S.R. & O. 1940 No. 1644), as amended by the Control of Referring to our article on the equipment of High Frequency Apparatus Order, 1942 (S.R. the Queen Elizabeth in our last issue, W. T. & O. 1942 No. 1564); and S.R. & O. 1939 Henley’s Telegraph Works Co., Ltd., remind us No. 1689 relating to the control of wireless that they supplied over 600 miles of 250-V and transmitters and certain other electrical appar 660-V rubber-insulated cable for the ship— atus. about 40 per cent, of the total. New L.C.C. Houses and Flats Dissolution of Partnership Four new and improved types of houses and H. Heywood and J. A. Waters, carrying on flats proposed to be adopted as standards for business as electrical contractors and suppliers future housing operations carried out by the of electrical goods, 173, King Street, Oldham, London County Council will be provided with have dissolved partnership as from August 21st, electric or gas cookers, constant hot water from slow combustion stoves (and electric immersion Trade Announcements heaters for supplying hot water in the summer), The Hotpoint Electric Appliance Co., Ltd., rearranged and improved kitchen fittings with has closed its depot at Rutland House, Otley, space for refrigerator, electric or gas copper in Yorks. Communications from this area should place of solid fuel copper, additional cupboard in future be addressed to 99, Corporation Street, accommodation, B.S.I. standard dressers and Manchester. kitchen cupboards, electric or gas fires in place The telephone number of the Gray’s Inn of open fires in first bedrooms and additional Road branch office of the Concordia Electric electric plug points. Wire & Cable Co., Ltd., has been changed to Terminus 8538. Department of Overseas Trade The Department of Overseas Trade is Trade Publication returning from Hawkins House, Dolphin Electrical Conduits, Ltd., Anchor Works, Square, S.W .l, to 35, Old Queen Street, West Birch Street, Walsall, Staffs.—Illustrated price minster, S.W .l, and all communications should list of conduit tubes as well as fittings and now be sent to the Comptroller-General at that accessories. address. Telegrams: Advantage, Pari, London; telephone: Victoria 9040. Developing a Large Supply Undertaking TRADE MARKS A lecture was recently 4given to over 300 T HE following applications have been made members of the English Electric (Stafford for trade marks. Objections may be Works) Engineering Society by Mr. F. W. entered within a month from November 14th:— Lawton, chief engineer and manager of the P a r t r i d g e and Transformer (design). No. Birmingham Electric Supply Department, on B634,000, Class 9. Electric current trans “ The Development and Administration of a formers and chokes.—Partridge Transformers, Large Electric Supply Undertaking.” The Ltd., 76-78, Petty France, London, S.W.L chair was occupied by Mr. E. B. Banks, deputy W a sp . No. 635,556, Class 9. Apparatus for commercial manager. Mr. Lawton gave a electrifying wire fencing, and parts thereof resume of the upward trend of Birmingham’s not included in other classes.—The Wolseley electric supply during a period of over fifty Sheep Shearing Machine Co., Ltd., Wolseley years culminating in the erection of Flam s Works, Electric Avenue, Witton, Birmingham, 6. Hall 44 B ” power station, which was designed Nevelector. No. 635,924, Class 9. Rectifiers for an ultimate capacity of 300,000 kW. Details for electric current.—Nevelin Electric Co., were given respecting generation, distribution, Ltd., Purley Way, Croydon. 754 E l e c t r i c a l R e v i e w N o v e m b e r 2 3 , 1 9 4 5 Load Equalisation Colliery Winding Equipment
HE need for new pit- By G. Barnard, a .m .i.e .e . transformers, C.T. These shafts with electric circuits pass through the winding equipment capable of dealing with windings of the torque-motor, T.M., which large colliery outputs was emphasised in the causes the bar to lift, thus inserting extra Reid Committee’s Report on Coal Mining, resistance in the rotor starter or slip published last March. Where the winder regulator. The driving motor A thereupon forms a large proportion of the electrical loses speed, allowing the flywheel, due to its load some system of load equalisation is inertia, to release stored energy, thereby generally necessary to relieve the power relieving the system of the heavy starting station and/or transmission lines of the peak load of the winder motor. sudden peaks on starting it up. The same At one colliery I know of, the power factor considerations apply to the use of rolling of the electrical system was considerably mills and similar heavy drives. improved by using an over-excited syn For this purpose a flywheel set with chronous motor to drive the flywheel set Ward-Leonard control may be used. Fig. 1 feeding a winder. This, however, raised the is a schematic diagram of a set in which the problem of arranging for the drop in speed driving motor, A, of the slip-ring induction necessary to take advantage of the flywheel type, drives a variable-voltage generator C, inertia whilst keeping the driving motor which is electrically connected to the winder- running at constant synchronous speed. A motor, D. The field control and reversing solution was found in the use of a hydraulic switch for the generator is indicated by j coupling H.C. (Fig. 2) between the syn chronous driving m otor, A, with its ^xciter, B, and the remainder of the set. The coupling con sists of an impeller rigidly fixed to the motor shaft and a runner attached to the shaft carrying the fly wheel and DC Ward- Leonard generator. Both impeller and runner are in one casing, which is supplied with oil from a pressure tank, P.T. When the coupling is full o f oil, the fly wheel and generator run on full load at a speed about 2 or 3 per cent, below the speed of the synchronous motor. When the coupling is empty, the COS. The driving motor is started in the flywheel and generator are stationary because usual way by a rotor starter and when up to they are completely disconnected from the speed, the winder motor is started. Since synchronous motor. the motor generator then takes additional By regulating the supply of oil to the current from the mains, more current flows coupling, the slip is varied accordingly. in the secondary circuits of the current The oil passes through a regulating valve V, N o v e m b er 23, 1945 Electrical Review 755
the latter being controlled by a torque induction motor operates as an eddy-current motor T.M. which, in turn, depends on the brake by having DC automatically switched loading of the set, because it receives its through the stator windings during the current from the transformers C.T. By regenerative periods. s, f -j . this means the load on the station can be When flywheel sets are used for supplying 5 (luj equalised to any predetermined value without power to heavy reversing drives, the capacity it, fu' altering the speed of the driving motor. o f the turbine or of the driving motor is In the Stubbs-Perry system, the Ward- determined by the average demand of the Leonard flywheel set is driven by a steam turbine, the speed of ¡ ¡ ¡ j* which decreases when peak loads are thrown on the set, thereby allowing the flywheel to give out some of t!!!' its stored energy. The t : steam demand on the boilers is therefore kept at a steady value. The turbines usually ' °, 1 operate at speeds between 4,000 and ■Wssps 5 000 RPM and drive souka, ti^e generators and ,cC “ flywheels through 6 0Qi to 1 gearing. ■ K ® When a winder is B, nil lowering material ideroftbea regenerative braking cooplin«; ¡s usecj ancj the of an regenerated energy is fed Hi returned to the Ward- stt si Leonard sets to be Fig.2.—Synchronous m otor driving W ard-Leonard flywheel set with hydraulic attactek usefully employed in slip regulator allying tit: speeding up the fly- and DC li wheel instead of wasted in heating brakeblocks reversing drive plus the losses of the entire rd be on the winder drum. An eddy-current brake is equipm ent. tapete fitted to the set to absorb the excess regenerated On a large system capable of dealing with are in energy and to hold the speed of the set within the maximum peak loads, a flywheel may not did safe limits. The eddy-current brake comprises be necessary and it may prove cheaper to dnithnli a cast-iron stator in which eddy-currents are use a plain Ward-Leonard equipment having ¡urelai: induced by a rotor magnetised with DC. a larger driving motor, which gives a higher the coupfc, It is controlled automatically by the turbine overall efficiency, in view of the losses due 1 öd, du governor, in conjunction with a relay which to windage of the flywheel (generally just mi he closes the DC contactors and excites the over 2 HP per ton), friction, and slip foil load; brake field magnets. regulation. Since flywheel windage losses lioiitlr Where a colliery takes public supply in increase as the cube of the speed, the highest :j0* [he c addition to generating electricity, the eddy- practicable peripheral speeds are not always jjidms: current brake can be replaced by an induction adopted. The losses in the hydraulic coupling Ha motor large enough to drive the set. A between the synchronous motor and the ,jjHjpty,: dutch is included between the turbine and W.L. set vary roughly as the slip and are Miyke the remainder of the set so that the turbine comparable with the power lost in the rotor ci'lm- may be declutched and the set driven by the resistance used for slip regulation with the induction motor fed from the public mains. induction motor and W.L. set. „¡I (oi This arrangement is flexible and economical, A flywheel speed variation of 10 to 18 per COTÜ1! there being no purely standby machines, cent, is generally arranged, depending on ¡¡Vilie because while the turbine is at work the requirements. The following example 756 E l e c t r i c a l R e v i e w November 2 3 , 1 9 4 5
indicates the method used to determine the Since the kinetic energy stored at any performance of a flywheel of a turbo-set, instant is proportional to the square of the having a mean radius of rotation of 5 ft. angular speed, at 690 RPM the energy stored and weighing 20 tons. Kinetic energy of a is |90^ x 208,000,000 = 91,000,000 ft. lb. W k 2 w 2 rotating body = -----■=------where k is the 2 g This calculation serves as a check on the radius of gyration and w is the angular foregoing. velocity in radians per second. At the normal Where the electrical system apart from the 7sn winder is large, load fluctuations caused by full speed of 750 RPM, w = X 2-n — 60 the operation of the winder may form a 78-5 and kinetic energy stored = small percentage of the total load, in which 20 x 2240 x 52 x 78-52 „ case it may be worth while to use the same - = 108,000,000 ft. lb. steam turbine for both Ward-Leonard set 2 X 32 and remaining load. The set would comprise 690 When the speed drops to 690 RPM, w = x a 3,000-RPM turbine with a direct-coupled 60 two-pole alternator at one end, and Ward- 2xr = 72 and kinetic energy has decreased to : Leonard set without flywheel coupled through 20 X 2240 X 52 X 722 2 x 91,000,000 ft. lb. gearing to the turbine at the other end. The turbine would be provided with a Energy given out by flywheel during drop in constant speed governor. The drawback to speed = 108,000,000 - 91,000,000 = this system, however, is that “ all the eggs 17,000,000 ft. lb. are in one basket.”
Sealing Motor Bearings t|tH E widespread use of grease as a lubricant majority of norml applications incorporates a for ball bearings on electric motors was due circular L-shaped packing member encircling primarily to the infrequency of the need for its the shaft, with which it is kept in light running replenishment and to the material reduction in contact by a spring and which is prevented from the risk of short circuits in windings that had revolving with the shaft. The materials used been experienced through oil leaking from plain for the seal vary with temperature and peripheral bearings. Grease, however, is not suitable for speed. Oak-tanned leather is generally satis high speeds or where the temperature is likely factory up to 148 deg. F. and 730 ft. per min., to approach 200 deg. and is often unsatisfactory chrome leather up to 195 deg. and 2,500 ft., even at 125 deg. F. Mineral oil is now regarded Supertan up to 230 deg. and 3,000 ft. and syn as the best lubricant for ball and roller bearings, thetic rubber up to a temperature of 260 deg. provided leakage and the ingress of foreign and higher speeds. matter can be prevented. Where the primary purpose is to retain oil in A simple design of seal that meets the great the bearing, the rubbing lip of the packing member is turned to face the bearing. For grit exclusion, however, the lip is pointed away from the bearing. When both conditions are equally important a dual type, as illustrated, can be fitted. In another variation, for use in narrow spaces, the width of seal can be reduced by omitting the coiled spring and relying upon the resiliency of the material of the packing member to keep the lip in contact with the shaft. Where the last type is adopted, the shaft should if possible be hardened, plunge-ground and polished or lapped to ensure its smoothness. The surface finish for leather packing members should be about 24 micro-inches and for synthetic rubber 10 micro-inches. Any flaw in the surface of the shaft is liable to cut the lip. All edges and corners over which the seal has to be slipped when assembling or taking down the bearing should be chamfered. The above information was supplied by Super Oil Seals & Gaskets, Dual-type of oil seal L td. 15,19| N o v e m b er 23, 1945 E lectrical Review 757 «4 * 5 ELECTRICITY SUPPLY WO.OOQi- Glasgow District Heating Step. New Wigan Station.
Aeckn Birkenhead. — Supplies to Houses. — The and 1908. The Council recently wrote to the Electricity Committee is applying for sanction to Commissioners asking whether they would be an,-, borrow £2,407 for the laying of l.v. mains to willing to entertain favourably an application I '1' housing sites at Heswall and Irby. for consent to the exercise of the purchase 1 ' Glasgow.— D istrict Heating. — The Housing rights. The Commissioners, in reply, referred ii Committee has agreed to engage Donald Smith to the statement of the Minister of Fuel and load,a, & Partners, consulting engineers, to report on Power regarding the desirability that there 0 .. the application of district heating to housing should be the minimum of disturbance in the " schemes for a consulting fee of £250. existing organisation of the undertaking pending u:~ Electric Heating for School. — The a Government pronouncement. woulda* Education Committee has arranged for the Swinton and Pendlebury. — “ A ll-electric ” : ; ;. Electricity Department to install electric heating H o u s e s .—The Electricity Committee is to lay at Penilee temporary school at a cost of £655. mains for fifty proposed “ all-electric” houses in Extensions and Change-over. — The Deans Road, Swinton. WpWfc Electricity Committee is to extend mains W igan.— New Power Station. —• At a recent its ofc (£6,000) and provide equipment for change Town Council meeting Councillor Winstanley over purposes (£5,000). stated that the Electricity Committee had [^¡¡jjjv Mansfield.—Extension of Area.— T he C or received a direction from the Central Electricity poration announces its intention of applying Board to proceed with a scheme for a new to the Electricity Commissioners for a Special generating station at Westwood. Order extending its area of supply to certain Y ork.— E x t e n s io n .—The Electricity Com parishes in Derbyshire and Nottinghamshire. mittee is to provide supplies to Cattal Village, Marlow (Bucks).— Tenants to Choose. — South Marton Farm, Stillington and Carlton On the recommendation of the Housing Com Farm, Nun Monkton, at a cost of £2,263. mittee the Urban District Council has accepted amended tenders of the Uxbridge Gas Company 3 Mas and the Wessex Electricity Company for HEM« installations in a number of houses. The gas Municipal Reports company offered to install its mains to a meter Bromley ' position in each house, together with points for N 1944-45 the Bromley Electricity Depart cooker and wash boiler and two gas poker I points at no cost to the Council. The electricity ment (borough electrical engineer, Mr. W. G. -•usia company’s tender was : service to meter position, Trend) sold 19-0 million kWh, equal to 415 ;2 s£i no charge; twelve electric lighting points, kWh per head of the population. Compared '::Ht|r £16 17s. 6d. ; five 5/10-A socket outlets, £9; with the previous year sales were up by about etul’i 2-kW immersion heater, £9; 15-A point for a million kWh, the largest increase being under wash boiler, £2; and point for cooker, to be the “ all in ” business tariff. Revenue from converted to a 15-A outlet in the event of the electricity amounted to £136,123 (£133,379), 133 i;j tenant not wishing to cook by electricity, no charge. The first tenants of the houses are to be total income being £146,281 (£144,025) and islirss; allowed to choose between electricity and gas working costs £109,599 (£103,230). After ofiki for the cooker and w ash boiler, after w hich any meeting all charges there was a deficit on the arii f. change will be at the tenant’s own cost. year of £6,982 compared with a profit of £503. Although the chairman of the Council The average price obtained per kWh sold was expressed the view that, being an interested 1 -722d. (l-776d.) and the total cost l-861d. SB3; party, he had not the right to speak, Councillor (L 875d .). L. J. Smith moved that the part of the electricity company’s tender relating to immersion heaters Oswestry iHTOiî should be deleted as he considered the Approximately 43 per cent, of the premises IhotS expenditure unjustified. The amendment was, within the Oswestry undertaking’s area are not however, defeated, only the mover and seconder voting in favour of it. yet connected to the supply. The borough elec usmberii' 6 trical engineer (Mr. H. Breckell) explains in his (Hut: Pudsey. — Postponement of Purchase report that a large number of these are in very D a te .— The Electricity Commissioners have made Orders extending by one year the period isolated parts of the rural area and some form of ended on September 16th last within twelve national subsidy and/or guaranteed annual in : • ■ months of which the Corporation may give six come, in addition to kWh sold, is necessary for lOoMbeî months’ notice of the purchase from the commercially sound development work. ¡¿I# Electrical Distribution of Yorkshire, Ltd., of Sales in 1944-45 amounted to 8-6 million kWh «foi those parts of its undertaking specified in the (against 7-3 million), an increase of 18 per cent. Ai| jjg Farsley and Calverley Electricity Orders. Total income from consumers was £55,849 and luisi Sowerby Bridge. — Purchase Option. — working expenditure £46,559. Loan charges „ * ic Application is being made by the Council for amounted to £7,691 and £572 was spent on frr: an Order further extending the period within capital works, leaving a net surplus of £1,327. Z which it may give notice to exercise its right & 0 to purchase the undertaking authorised by the In the quarter ended March 31st last a rebate of Sowerby Bridge Electric Lighting Order, 1900 25 per cent, was allowed on quarterly accounts. 758 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
PARLIAMENTARY NEWS jjtiirda ■ t o » By our Special Reporter jjO p.i No Electricity Supply Inquiry should be observed, however, that the grid . j,,- I N the House of Commons on November 13th system was operated as one unit over the whole 0 * Mr. De La Bere asked the Minister of Fuel country and it was not always possible to treat and Power whether he would hold an official Scottish supplies separately. inquiry into the working of the electricity supply companies and particularly into those Analysis of Supply concerns that were governed and controlled by In a written answer to Major Ramsay, holding companies. Mr. Buchanan, Secretary of State for Scotland, Mr. Shinwell said that a statement on the said that the total quantity of electricity (in future of the electricity industry would be millions of kWh) produced by public under made at an early date. In the circumstances takings in Scotland, England and Wales respect he was unable to agree to the suggestion for a ively during the last complete year for which special inquiry. figures were 'available, namely, 1944, was as follows: Scotland, 3,907; England (including A War Office Cable Monmouth), 32,282; and Wales, 2,174. Mr. Dye asked the Minister of Fuel and The estimated output of the schemes which Power whether he would arrange for the the N orth o f Scotland H ydro-E lectric Board existing cable to the village of Weating, Norfolk, had in preparation was approximately 934 to be used to supply the new council houses million kWh, which was approximately equiv about to be erected and also other houses in alent to 24 per cent, of the Scottish, 3 per cent, the village. of the English, and 43 per cent, of the Welsh Mr. Shinwell said he understood that the output for 1944. If projects already surveyed East Anglian Electricity Supply Co. was pre by the Board but not yet the subject of con pared to tap this cable to afford supplies to the structional schemes were included the total houses referred to if satisfactory arrangements output of the Board’s schemes would be approx could be made with the War Office, which imately 2,234 million kWh, making the approx owned the line. He had taken the matter up imate percentages for Scotland 57, England 7, with the War Office and would communicate and Wales 103. with Mr. Dye as soon as possible. Nationalisation Plans Aid for Farms On November 19th Mr. H. Morrison, the Answering Mr. Driberg, Mr. Shinwell said Leader of the House, in announcing the Govern he agreed that wherever practicable electrical ment’s plans for the nationalisation of industries, plant and equipment hitherto required for said, “ The Government will introduce a Bill military purposes should be used for the develop during the present Session to nationalise the ment of rural supplies. It had been arranged coal-mining industry. At a later stage in the that Service Departments would notify the lifetime of this Parliament the Government Electricity Commissioners of any cases where intend to introduce measures to bring under the local undertaking concerned did not wish national ownership the electricity supply to take them over. The Commissioners did industry and the gas industry. This will imple everything possible to promote the use of this ment the concerted plan for the co-ordination equipment for civilian purposes. of the fuel and power industries which was fore shadowed in the King’s Speech.” He went on Peak Load and Capacity to say that the Government also intended to Mr. Cook asked the Minister of Fuel and nationalise the transport services, but not Power if he would state the peak load require shipping. ments in the country of electric power and the With regard to iron and steel, the Govern supplies available. ment proposed to await the report on the Mr. Shinwell said it was estimated that the organisation of the industry before coming to peak load on the national grid system during a decision. During the interim before the plans the coming winter would be between 8^ and 9 could be carried out, all necessary development million kW, according to weather conditions. in the industries concerned must proceed. The The available capacity of the generating plant compensation payable would have regard to was not likely to exceed 8-6 million kW. any extent to which an undertaking had not In reply to a further question Mr. Shinwell been maintained up to the time of transfer and said it was estimated that the peak load on that the Government would naturally take precau portion of the grid system in Scotland during tions in its legislation to protect the acquiring the coming winter would be between 775,000 authority against any transactions entered into and 825,000 kW according to weather conditions. in the interim period, whether by way of contract The available output capacity of the generating or otherwise, which might prejudice that plant was not likely to exceed 790,000 kW. It authority. N o v e m b e r 23, 1945 E lectrical Review 759
Loughborough.—I.E.E. South Midland Stu Forthcoming Events dents’ Section. “ Air-blast Circuit-breakers,” Saturday, November 24th. — Manchester. — by J. Humphries. College of Technology, Sackville Street, 6.45 to Saturday, December 1st.— Manchester.— A t 10.30 p.m. I.E.E. North-Western Students’ Geographical Society, 16, St. Mary’s Parsonage, Section. Autumn dance. 2.30 p.m. lunior Institution of Engineers Monday, November 26th.— London.— Institu “ The Application of Electric Motors and tion of Electrical Engineers, 5.30 p.m. Informal Control Gear,” by H. P. Pentelow. meeting. Discussion on “ Standardisation of Monday, December 3rd. — Birmingham. — Ripple Control,” to be opened by T. R. Rayner. James Watt Institute, 6 p.m. I.E.E. South Birmingham.—Grand Hotel, 6 p.m. I.E.E. Midland Centre. “ Factors Influencing the South Midland Centre. Thirty-sixth Kelvin Design of Electric Lighting Installations for Lecture : “ Scientific Principles of Radioloca Building Interiors,” by R. O. Ackerley. tion,” by Sir Edward V. Appleton. L iverpool.— Royal Institution, Colquitt Street, Newcastle-upon-Tyne. — Neville Hall, 6.15 6 p.m. I.E.E. Mersey and North Wales Centre. p.m. I.E.E. North-Eastern Centre. " Excess- “ Practical Aspects of Telephone Interference Current Protection by H.R.C. Fuses on Medium- Arising from Power Systems,” by P. B. Frost voltage Circuits," by R. T. Lythall, and “ Excess- and E. F. M. Gould. Current Protection by Overcurrent Relays on Sheffield.— University, Western Bank, 6 p.m. Medium-voltage Circuits,” by A. G. Shreeve Illuminating Engineering Society. “ Public and P. J. Shipton. Lighting,” by N. Schofield. Cardiff.—At South Wales Institute of En gineers, 6 p.m. I.E.E. Western Centre Installa Thursday, December 6th.— London.—Institution tions Group. “ Electrical Problems Associated of Electrical Engineers. “The Operation of Large with Aero Engine Testing,” by A. N. Irens. Turbo-Alternators to Reduce Rotor-Winding Tuesday, November 27th.— London.— Institu Deformation,” by R. H. Coates and B. C. Pyle. tion of Electrical Engineers, 5.30 p.m. Radio (In lieu of paper previously announced). Section. Discussion on “ Film Forming Materials Used in Insulation,” to be opened by C. R. Pye. Loans Sanctioned Manchester.—At Engineers' Club, 6 p.m. Public Supply Authorities’ Needs I.E.E. North-Western Centre and Institution of Post Office Electrical Engineers, Manchester ’■’kETAILS have been issued by the Centre. “ Practical Aspects of Telephone Electricity Commissioners of the amounts Interference Arising from Power Systems,” by which public authority electricity undertakings P. B. Frost and E. F. H. Gould. and the Central Electricity Board have received G lasgow.—Societies’ Room, Royal Technical sanction to borrow during the last seven and a College, George Street, 6.15 p.m. I.E.E. Scottish Centre. “ The Place of Radiant, half years. Commencing with the last pre-war Dielectric and Eddy-Current Heating in the year the annual totals have been as follows, the Process Heating Field,” by L. J. C. Connell, Central Board’s share being given in parentheses : G. W. Humphreys and J. L. Rycroft. 1938-39 £25,288,803; 1939-40 £19,900,815 Loughborough.—At Loughborough College, (£1,000,000); 1940-41 £18,760,500 (£1,000,000); 6.30 p.m. I.E.E. East Midland Sub-Centre. 1941-42 £10,998,291 (£4,000,000—for war emer Informal paper : “ Engineering Standardisation,” gency extensions); 1942-43 £18,884,592 by J. H . R . N ix o n . (£9,700,000—in respect of grid expenditure, Wednesday, November 28th.— London.— Insti largely pre-war, and the extension of the Earley tution of Electrical Engineers, 7 p.m. London Students’ Section. “ Production of X-rays, and station); 1943-44 £5,363,953 (£2,250,000); 1944- Some Electrical Engineering Aspects,” by R. A. 45 £30,362,818 (£2,025,000, including further Briggs. extension of Earley station); first six months of R ugby.— Electricity Showrooms, 7 p.m. I.E.E. 1945-46 (to September 30th last) £20,835,786 Rugby Sub-Centre. ’ “ Recent Progress in the (including £3,000,000 for the North of Scotland Design of the High-voltage Overhead Lines of Hydro-Electric Board). An analysis of the last the British Grid System,” by W. J. Nicholls. two totals is appended:— A berdeen.—Caledonian Hotel, 7.45 p.m. I.E.E. Scottish Centre. As at Glasgow, Novem D e t a il s o f S a n c t io n e d L o a n s
ber 27th. P e r i o d Thursday, November 29th.— B radford.— E lec tricity Showrooms, Sunbridge Road, 6.45 p.m- I t e m 6 months Illuminating Engineering Society. “ Industrial ended 30th Lighting,” by D. A. Strachan. 1944-1945 Sept. 1945 Newton Abbot.—Globe Hotel 3 p.m. I.E.E. £ £ Devon and Cornwall Sub-Centre. “ Control of Purchase of property 13,907 52,180 Electrical Installation Work,” by W. R. Watson. Buildings (generation) 6,711,285 3,320,616 Cru ml in.—Association of Mining Electrical Buildings (distribution) 42,734 100,783 and Mechanical Engineers (South Wales Plant (generation) 20,323,383 11,278,552 Branch) Visit of Chief Electrical Inspector of Plant (distribution) 593,327 1,203,519 Mains and services 491,422 1,498,672 Mines (Mr. G. M. Harvey). Meters and instruments 31,249 113,395 Friday, November 30th.— Newcastle-upon-Tyne. Wiring installations 1,107 3,000 At Mining Institute,6 p.m. North East Coast Apparatus 24,034 46,500 Institution of Engineers and Shipbuilders. Other purposes 105,370 3,218,569 “ Electronics : Their Scope in Heavy Engineer Total 28,337,818 20,835,786 ing ” by W. G. Thompson. 760 E l e c t r i c a l R e v i e w N o v e m b e r 23, 1945 FINANCIAL SECTION Company News. Stock Exchange Activities.
molten salts for processing metals and the Reports and Dividends company has taken steps to acquire the necessary Crabtree Electrical Industries, Ltd.—The chemical knowledge and manufacturing rights accounts of J. A. Crabtree & Co., Ltd. (the to take advantage of this development. operating company) to July 31st last show a After a comparative lull, orders are now trading profit, with other receipts, of £226,987, coming in and are likely to grow. Several new as compared with £246,431 in the preceding processes have been examined and arrangements year. Income tax and E.P.T. take £142,351 made with Americans for technical co-operation. (£162,451) and after allowing for depreciation, Export trade is being actively pursued and in and writing off all capital expenditure incurred this connection he mentions that the company during the year, there remains a balance of has joined with five other leading manufacturers £77,982 (£72,439). From this £65,000 (same) of metallurgical plant to form a new organisa in tax-free dividends is paid to Crabtree Elec tion, .the Metallurgical Equipment Export Co., trical Industries, £13,000 is set aside for deferred Ltd. repairs (against £10,000 to reserve) and £76,856 J. Stone & Co., Ltd., are again paying an (£76,875) is carried forward. As reported in our interim dividend of 10 per cent. November 2nd issue, Crabtree Electrical Indus tries is paying a final ordinary dividend of 5 The British Electric Resistance Co., Ltd., is per cent, and a cash bonus of 7J per cent, repeating its ordinary dividend of 20 per cent, making, with the 5 per cent, interim dividend, for the year. a total of 17£ per cent, (same) for the year. The Broadcast Relay Service, Ltd., announces an interim ordinary dividend of 3J per cent, Burco, Ltd.—The trading profit for the year tax free, the same as last year. to September 30th last was £47,255; this compares with £17,838 in the preceding year The Delhi Electric Supply & Traction Co., Ltd., and £32,208 in 1942-43. With interest received is maintaining its interim ordinary dividend at 4 the total available is £47,767 (against £39,993 per cent., tax free. in 1943-44, including £21,321 E.P.T. credit). Max Stone, Ltd., have announced a dividend Taxation absorbs £22,301 (£19,618) and after of 15 per cent., against 10 per cent, last year. deducting fees and depreciation there is a net Dictograph Telephones, Ltd.—A meeting is profit of £21,969 (£16,478). A sum of £11,500 to be held on December 12th to consider is transferred to general reserve (against £8,000 resolutions for increasing the capital to £250,000 to dividend equalisation reserve), the ordinary by the creation of 500,000 additional 2s. shares dividend is increased from 15 to 20 per cent, ranking p a r i p a s s u with the existing shares for and £20,998 (£21,029) is carried forward. dividend, etc. No immediate issue is to be made. Tube Investments, Ltd., is making a special distribution of. 10 per cent, to the ordinary McMichael Radio, Ltd., has declared a dividend shareholders out of the £400,000 built up of 10 per cent, on the preferred ordinary shares, during the war to compensate them for the representing 4 per cent, for the six months to 3£ per cent, reduction in dividend since 1941. December 31st, 1942, and 6 per cent, for the Apart from this, the ordinary dividend is nine months to Sept. 30th, 1943. maintained at 22\ per cent, by the declaration of a final payment of 12£ per cent. Owing to New Companies the cancellation of war contracts the profits of the group declined by £69,461 to £2,027,195 Decca Navigator Co., Ltd.— Private company. and those of the parent company from £143,785 Registered November 7th. Capital, £500,000. to £136,910. A balance of £211,318 on the Objects: To acquire the business of manu contingencies fund is placed to reserve. facturers of, and dealers in, radio transmitting equipment, receivers and dial indicators for Electric Furnace Co., Ltd.— More than 1,500 navigational purposes hitherto carried on by electric furnaces of all types, having an aggregate the Decca Navigator Co., as a branch of the capacity of over 300,000 kW, were installed by Decca Record Co., Ltd. Directors; E. R. the company during the war. Recording this Lewis, 2, Bell Moor, Hampstead Heath, N.W.3; in a statement circulated with the report and H. F. Schwarz (U.S.A.), The Haven, Foxenden accounts, Mr. D. F. Campbell (chairman) points Road, Meopham, Kent; W. J. O’Brien» 112, out how improvements in the electrical melting Rodney House, Dolphin Square, S.W.l; Sir and heat treatment of metals have influenced Cyril F. Entwistle, 9, Queen’s Gate Place Mews, the development of aircraft and aero-engines, S.W.7; Group Capt. John A. C. Wright, the gas turbine, radar equipment, tanks, etc. Rectory Lane, Castle Bromwich, Birmingham; The company installed almost all the furnaces and Comdr. Sir Hugh R. Dawson, Burway used to produce cartridge brass, he states. House, Laleham-on-Thames. Registered office: Extensions of brass melting capacity during the 1/3, Brixton Road, S.W.9. war aggregated a potential output of consider G.K.P., Ltd.—Private company. Registered ably more than 100 tons per hour. Well over November 6th. Capital, £10,000. Objects : To 1,100 resistance furnaces with an aggregate carry on the business of manufacturers of, and capacity exceeding 90,000 kW were supplied dealers in, and repairers and hirers of, electrical for a wide range of industries, many of which and mechanical apparatus, accessories and will be as active in peace as in war. There has components of all kinds, wireless sets, electronic been an outstanding increase in the use of equipment, valves, television sets, etc. Sub N o v e m b e r 23, 1945 E lectrical Review 761
scribers: G. Harle and G. Glassco, both of 97, dealers in, wireless and television sets, accessories Cannon Street, E.C.l. Solicitors: Linklaters and apparatus, artificial lighting apparatus, & Paines, 97, Cannon Street, E.C.l. electrical fittings, etc. Directors: H. B. Elliott Eagle Electrical Products, Ltd.— Private com (permanent) Sunnyside, The Beeches, Ponteland, pany. Registered November 6th. Capital, Newcastle-on-Tyne, and three others. Regis £100. Objects: To carry on the business of tered office: Elvic Works, Ponteland, manufacturers and distributors of, agents for, Newcastle-on-Tyne. and wholesale and retail dealers in, wireless and Industrial Electronios, Ltd.— Private company. television sets, sound producing machines of Registered November 9th. Capital, £1,000. all kinds and components, electrical accumu Objects: To carry on the business of electrical, lators, batteries, electrical and other lamps and mechanical and general engineers, electricians, plant, etc. C. Weinstock, 64, Pryland Road, workers and dealers in electrical and electronic Highbury, N.5, is the first director. Secretary: apparatus, etc. First directors: L. W. Mant, MissJ. D. Rowland. Registered office : 139/142, 28, Welbourne Road, Broadgreen, Liverpool, Copthall House, E.C.2. and two others. Registered office: 160, Lewis Electrical Co. (Ruislip), Ltd.—Private Kensington, Liverpool. company. Registered November 7th. Capital, Knightsbridge Radio, Ltd.— Private company. £1,000. Objects: To carry on the business of Registered November 12th. Capital, £2,000. general and electrical engineers, manufacturers Objects: To carry on the business of manu of electrical and radio requisites, etc. Directors : facturers and repairers, importers and exporters L. A. C. Helmer, The White House, High of, and wholesale and retail dealers in, radio, Wych, Sawbridgeworth, Herts and H. R. television, telegraphic and electrical goods, Lewis, The Elms, Joel Street, Eastcote, Pinner, etc. First directors: J. G. Varley, 35, Holland Middlesex. Registered office: High Wych, Street, W.8, and three others. Registered Sawbridgeworth, Herts. office: 11, William Street, Lowndes Square, Cavendish Radio & Electrical Co., Ltd.— S .W .l. Private company. Registered in Edinburgh November 8th. Capital, £1,000. Objects: Mortgages and Charges To carry on the business of radio, electrical, New Era Time & Telephone Systems, Ltd.— motor and general engineers, etc. Subscribers: Issue on October 9th, of £5,000 debentures, W. V. Wright, 153, Warrender Park Road and part of a series already registered. W. Brown, 96, Boswell Terrace, both Edinburgh. Registered office: 53, George Street, Edinburgh. Hume Atkins & Co., Ltd.—Mortgage on freehold factory and two adjoining cottages, Electronics (Clayton), Ltd.— Private company. known as Maybury Works, Maybury Road, Registered November 8th. Capital, £1,000. Woking, dated October 10th, to secure all Objects: To carry on the business of electrical moneys due or to become due from the company engineers, manufacturers of, and dealers in, to Midland Bank, Ltd. electrical and wireless goods, etc. Directors: R. Walsh, 15, Fort Street, Clitheroe, and three others. Registered office: 140, Whalley Road, Liquidations Clayton-le-Moors, Accrington. Larne Electric Light & Power Co., Ltd.— T.R.E., Ltd.—Private company. Registered Particulars of claims to be sent to the liquidator, October 27th. Capital, £500. Objects : To Mr. S. Boyle, 38, Donegall Place, Belfast, by carry on the business of wireless and television January 1st. (All creditors have been or will manufacturers and service engineers, dealers in be paid in full.) all kinds of wireless, electrical, radio, television and telephone appliances, accumulators, stores Bankruptcies and supplies, etc. First directors:—C. E. Dyke, H. Beaumont, electrical engineer and radio 17, Shakespeare Street, Watford, and four dealer, 207, Luck Lane, Paddock, Huddersfield.— others. Registered office: 8, Queen Street, An application for discharge was heard recently Cheapside, E.C. at Huddersfield. The receiving order was made Colllnson Bros. (Bradford), Ltd.—Private in 1940. The liabilities then amounted to company. Registered October 31st. Capital, £933, but proofs admitted totalled £670, with £1,000. Objects : To acquire the business of probable claims of £980. The assets, estimated electrical engineers carried on by W. E. Putt and at £100, realised £167, and a first and final Hubert G. Collinson at 3 & 5, Millergate, dividend of 3s. lji. in the £ had been paid on Bradford. First directors:—W. E. Putt, 193, proofs for £670. The debtor attributed his Folkestone Street, Bradford, and H. G. Collin failure to loss in connection with a partnership son, 13, Glenholme Road, Baildon, Yorks. and losses on motor cars and hire purchase Registered office: 3 & 5, Millergate, Bradford. transactions. The decision was adjourned Modernitas, Ltd.—Private company. Regis sine die. tered November 12th. Capital, £100. Objects: L. H. Lawrence, carrying on business at 43, To carry on the business of manufacturers and Canterbury Road, Margate, as Henry F. repairers of, and dealers in, dynamos, motors, Lawrence, electrical engineer.— Discharge sus armatures, magnetos and batteries, etc. Sub pended for fourteen days; date of discharge scribers : R. Harris, and Percy F. Money, October 30th. both of 3/4, Clement’s Inn, W.C.2. Solicitors: J. J. Symons, carrying on business as the Buckeridge & Braune, 3/4, Clement’s Inn, Zodiac Peerless Electric Lamp Co., 25, Den W .C .2. mark Street, Charing Cross Road, W.C.2.— Vickers Elliott & Son, Ltd.—Private company. Proofs for dividend to be sent by November 28th Registered November 9th. Capital, £100. jo the trustee, Mr. L. A. West, Bankruptcy Objects: To carry on the business of manu Buildings, Carey Street, W.C.2, Senior Official facturers and repairers of, agents for, and Receiver. 762 E l e c t r i c a l R e v i e w November 2 3 , 1 9 4 5 STOCKS AND SHARES of the previous year. The dividend, as already announced, is 5 per cent, plus a bonus of 7) per 'W 'HE gilt-edged stocks in the security markets cent., making 17) per cent, for the twelve-month, -■ have shown a weakening tendency ascribed a rate which has been paid regularly each partly to the final effect of the Thanksgiving year since 1937. Weeks, which are soon to come to an end, The company acquired, in 1936, the whole of partly to the greater activity in stocks and the capital of J. A. Crabtree & Co., Ltd. shares in other department's. The necessity for (formed in 1919 to manufacture switches and financing purchases of the more speculative other electrical installation accessories). The issues has led, it is surmised, to sales of British dividend and bonus of 17) per cent, has been paid Government stocks, the prices of which have out of earnings'that ranged from 18 per cent, declined under the leadership of 2\ per cent. for 1943 to 37 per cent, in the previous year. Consols. This spread dullness throughout the The price of the shares is about 46s., at which purely investment classes, though it failed to the yield on the money is 4 per cent. The shake the best-class ordinary shares of industrial balance sheet is strong. Plant and machinery, companies, amongst which those of the Home fittings and fixtures, and patents, each stand electricity supply group are, of course, included. at £1. Prices of these ordinary shares keep firm, but the preference show a tendency to droop in Radio Shares consequence of the uncertainty as to the position Buying from America is generally said to be of the shares under the proposed nationalisation the reason for a sharp rise to 35s. 6d. in Electric of the industry. & Musical shares. New York is reported to Revival of Confidence have given 36s. 6d. for the shares in the London market. A. C. Cossor rose at the same time After the apprehension aroused by the result to 45s., shares having changed hands up to 46s. of the General Election, there has come a Philco hold their previous advance to 11s. revival of confidence in the outlook and a Pye deferred are a- trifle harder at 36s. 3d.; renewal of the support from investors. “ Net E. K. Cole remain at 37s. 6d. maintainable revenue ” is one slogan, and “ fair compensation ” another in connection Price Movements with nationalisation. Optimism is possibly Burco shares advanced to 19s. ex dividend. inclined to expect generous treatment from the Tube Investments, after being 6$ , lost the Government. Yorkshire Electrics have fraction; the company has declared a special hardened to 42s. 6d., City Lights to 30s. and distribution of 10 per cent, on the ordinary Richmonds to 27s. Midland Counties are 6d. shares. Telephone issues are a trifle easier lower at 41s. 6d. Prices of preference shares after their recent advances. Automatics fell have mostly lost 6d. or Is. under pressure of back to 70s., Orientals to 58s. 9d. The equip many small orders to sell. ment and manufacturing group shows gains of 3s. 9d. to £4^ in Christy Bros., and 2s. 6d. Cable & W ireless in Consolidated Signals to £7. Ever-Ready at One of the most active markets is that for 44s. 6d. are a few pence easier. Falk, Stadel- Cable & Wireless stocks. The ordinary stock mann at 38s. put on Is. and General Electrics has been in particular demand, the price at one are better at 97s. 9d. Hopkinsons are a good time drawing almost level with that of the market at 86s. 3d. per cent, preference. A good many of the Southern Railway 5 per cent, preference at buyers took some of each stock, in the pro 106 is 1) lower. A rise of Is. 6d. lifted West portion of three preference to one ordinary, Ridings to 45s. British Electric Traction on the ground that if the company were to go deferred at 1145 is 15 points up into liquidation, the preference might be repaid at 100, but that, in such event, the ordinary Overseas Shares would receive something like 160 to 180 per Calcutta Trams went back to 88s. 6d. after cent. On the other hand, if the Combine being buyers at 90s. The Calcutta Corporation remains in being, the preference will presumably is to take over the system on January 1st next, receive a British Government stock in exchange and announcement of the terms is expected for what assets the Government acquires. daily; “ bulls ” of the shares talk of a possible The attraction of the double purchase appealed £5, or even more, per share. Calcutta Electrics to a wide circle of investment. After erratic are easier at 62s. 6d., Madras Electrics at fluctuations, the two stocks are both up 10s. 41s. 6d. have lost a florin, and Cawnpores the ordinary at 107] and the preference at 112). went back to 63s. 6d. Amongst other overseas Globe ordinary rose to 45s. and the preference issues, Tokyo sixes at 43) are 4 points lower. to 32s. The trouble in Palestine has had no effect upon Jerusalem or Palestine Electric “ A ” shares, the Crabtree Electrical prices being 25s. 6d. and 36s. 6d. respectively. Crabtree Electrical Industries shows a net Victoria Falls and Transvaal Power shares at profit for the year to the end of last month of 98s. 3d. have lost a few pence. Atlas Electrics £77,902, an advance of about £5,500 on that recovered to 8s. 9d. N o v e m b er 23, 1945 E l e c t r i c a l R e v ie w CONTROL
S i a t * * s t a
Up to 90 H.P., 400/440 V O LTS VERITYS L ASTON, BIRMINGHAM 6
Sales Headquarters : ia ä a BPETT ENHAM HOUSE, LANCASTER PLACE, W.C.2 ' E. ks a teii pi
1 « $ i I k e # C e alias; s-aiłi Ew-fc*! FAS* \ > c as! Be ^ evet "cl E lt lB L W » w c SŚSE1 ¿ ¡ ä a i 's si Ik*
SŁlić MAKE REGULAR USE OF . . . IC«!®-’ E}iSS 6 BP iip® MARTINDALE COMMSTONES e Es3 £to»; 0 C ut copper, brass and steel w ith o ut Over 50 sizes in stock, In 3 grades: coarse, ürap clogging. Edges of every bar left clean ; medium and fine. 20 different types of ia DIBS no dragging of copper. Save 75% of time handle. im IP and cost of turning comm utator in lathe. Over 25,000 regular users all over the SE»\ Give longer life to motors, etc. w orld. siars» sj®*’ MARTINDALE ELECTRIC C? LlD WESTMORLAND ROAD, LONDON, N.W.9 sh a»1 Phone t Collndale 8642-3 Grams : Commstones, Hyde, London iiiiiuiiiiiiiiiilllllllliiiiii"i>lllllllllll|l|llllll|l,lllllll»l»l|lll|l|liiillliiiiiiiiiillii|||||iiiillliiliillliilliiiii|iiilillliii||i|iiiii|i|i|i|iiiiiiiiiiii!i)|| 5 4 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
O r AU. ELECTRICAL PURPOSES f °
THERMOPLASTIC INSULATION (P.V.C) •• POLYKOL ” is our registered title and N o v e m b er 23, 1945 E l e c t r i c a l R e v ie w 7 6 3 RECENT INTRODUCTIONS Notes on New Electrical and Allied Products
Fault Finder sulaled pattern and socket entries are provided for all existing B.S.S. plugs. Panel switches are »M AINTENANCE engineers responsible for of the low resistance toggle type with rotary " the upkeep of factory installations may like switches for controlling the power circuits and to know of a fault-finder, available from R u n - meter range positions. bakcn Products, 71, Oxford Road, Manchester, Connection diagrams are furnished with the 1, which is designed for testing single-phase and instruction manual, which contains a compre DC equipment up to 3 kW capacity. hensive list of tests that can be performed with The outfit is contained in a polished hard the outfit. w o o d case; it is protected by magnetic cut-outs against short circuits and by fuses against per Toaster for Home or Restaurant sistent overloads. Visible and audible circuit continuity testing can be done at low and A new toaster made by the Cooper Manu medium voltages. There are facilities for earth- f a c t u r i n g C o., L t d ., Hanway Street Works, leakage and insulation testing while a special Hanway Street, London, W .l, is suitable either socket is provided for determining the continuity of earthing leads by passing a heavy leakage current through them. First grade accuracy is claimed for the moving-coil indicating meters which are of the 2-5-in. size with voltage ranges of 0 to 30 and 0 to 300 AC or DC and 0 to 1, 0 to 5, 0 to 15A as well as 0 to 25A for leakage tests. Testing terminals are of the Belling Lee in-
The Cooper toaster
for home or restaurant use. It measures overall I Z i in. by 5 in. by 7-1,- in. high and toasts two slices of bread at a time, both sides, in about five minutes. The 800-W elements, which are decrementally wound to ensure that the toast is evenly browned, are mounted on “ Sindanyo ” board each side of the toasting compartment, the toast being removed by means of pivoted trays at each end. There is a heat-resisting wooden handle at the top, and the feet are also of wood. The apparatus is at present constructed of tin-plate but anodised aluminium sheet will be used when supplies are available. Electronic Relay An electronic relay that needs only a few 'microwatts to operate it, yet is capable of con trolling AC loads of up to 2 kW at 200 to 250 V, is announced by Sunvic Controls, Ltd., Stanhope House, Kean Street, London, W.C.2. Although it has been primarily developed for use with light contacting devices (toluene regulators) in order to resist contact erosion and oxidation, Type-EA.2 is adaptable for operation with a photo-electric cell, so widening its range of usefulness. The circuit is so Fault-finding test outfit for factory maintenance arrangedjthat opening of the control contacts 7 6 4 E l e c t r i c a l R e v ie w November 2 3 , 1 9 4 5
changes the phase of the grid in relation to the 35, Percy Street, London, W .l. It is adjustable anode, thus causing anode current to flow in height and angle on a short upright column through the heater winding of a hot wire supported by a bench pedestal. The plano vacuum switch, which closes the load circuit. convex magnifier lens is inset in a hood that When the control contacts close the relay ceases directs the light downward. For most purposes to “ fire,” so causing the hot wire switch to a 15-W lamp will suffice, but the reflecting cowl break the load circuit. is ventilated to accommodate a 60-W lamp. A double-pole isolating switch and pilot lamp are incorporated, with a protective fuse on the Battery Terminal Oilers primary side of the mains transformer. Plug The “ Clatonrite ” battery terminal oiler and socket connectors render the relay portable marketed before the war was produced from while the cast aluminium case measures 6-5 by base metal material. A new type just introduced 3-5 in. and weighs 7-5 lb. by the makers, Howard Clayton-W right, L t d ., Tiddington Road, Stratford-on-Avon, is Illuminated Magnifier moulded in a flexible plastic material which is An illuminated magnifier for minimising eye claimed to be practically unbreakable. The strain in visual inspection and fine assembly oilers, which are supplied in pairs, are quickly work called the “ Speetol-Gordon Magna- fitted and need only a few drops of oil in the scope,” is being offered by Speed Tools, L t d ., reservoir every six months. wEkco” War Activities INCE a year before the war, E. K. Cole, Ltd., conditions of weather; the A.I. Mark 4 and have been engaged on war contracts,. Much Mark 8 for night interception of enemy planes; of the work was, naturally, very secret and and the H28 sets which give a complete picture involved the transfer of the chief engineer, of the ground traversed on cathode-ray tubes Mr. A. W. Martin, and his staff from Southend in map form, used by Bomber Command. to Malmesbury, Wilts. Many radio sets were produced, and the Among the first tasks undertaken was the company was responsible for the development development of radar air interception equipment of the receiver of the T1154-R1155, a trans (A.I.) and the first air-to-surface-vessel equip mitter and receiver used in bombers, making ment (A.S.V.) for locating convoys when radio nearly half the 100,000 sets produced. No. 19 could not be used. A secret station was set up radio sets were produced for installation in on Canvey Island and A.S.V. tested on ships about 70,000 tanks and mobile units, and three passing up and down the Thames. It was out of every four radio sets for Lancaster successful over a range of from 40 to 60 miles. bombers. The No. 46 set, conceived by E. K. Cole’s own engineers, works on fixed frequencies and is provided with a larynx microphone. Its success in the Dieppe raid and at Anzio was such that large quantities were manufactured for use on D-Day and after. Large numbers of Lancaster and Lincoln bombers were provided with prefabricated wiring. The lamp division supplied millions of electric lamps for Government Departments, some of very specialised types. A valve depart E. K. Cole night fighter interception equipment ment was established. The plastics division has been enlarged considerably during the war to Later using an improved type for which the produce millions of moulded parts. company made the cathode-ray indicator, the The parent factory at Southend was, by Fleet Air Arm was able to locate enemy vessels Government order, evacuated when invasion in the worst weather and it formed the basis of threatened, and equipment and staff were trans the transmitter of the searchlight beam control, ferred to Aylesbury. Branches were opened at and also as radar warning for A.A. gun sites. Malmesbury, Wilts, and Woking. In 1941 the The company was responsible for the develop Southend works was re-opened with a largely ment of much of the V.H.F. ground equipment new staff. More recently a new factory at by which fighters were able to maintain contact Rutherglen, near Glasgow, has been opened. with their control on the ground and at one During the war extension was made to the time was the only producer of this equipment. section responsible for testing materials and The Navy also used Ekco radar sets for identi components, by X-rays and other means. This fying friend and foe (I.F.F.), and the company section is being maintained. A limited quantity also produced large numbers of the Gee radio of radio sets is already being manufactured and equipment which guided bomber pilots to their the plastics division has begun to make moulded targets over a distance of 300 miles in all radio cabinets and other products for civilian use. N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 765 CONTRACT L\FOR3IATIO\ Accepted Tenders and Prospective Electrical Work
Burnley.—Extensions (£14,750), Bank Hall Contracts Open Maternity Hospital; J. L. Beckett, borough Where ^ Contracts Open ” are advertised in our engineer, Town Hall. “ Official Notices ” section the date of the Issue Cheshire. — Police headquarters, “ Vale is given in parentheses. Royal,” Delamere: county architect, The Castle, Australia.—P.M.G.’s Department. January C hester. 3rd, 1946. Induction coils tSch. C48I6.) Chesterfield.—Houses (133), for R.D.C.; January 8th. Automatic exchange switchboard Houfton & Kington, architects, Market Place. equipment for Cheltenham, Vic. (Sch. C4713). Clacton.—Extension scheme (£50,000), January 15th. Cable, trunk type (Sch. C4833). Clacton and District Hospital; secretary. Testing instruments, exchange service type (Sch. C4820). January 17th. Telegraph instru Clitberoe.—Foundry, Saunder Raike, Clip ping; G. Tweedy & Co., Ltd. ments (Sch. 4826). January 22nd. Telephone parts (Sch. C4835). Consett.—Houses, Delves Lane, Ritson’s Sydney County Council-—December 13th. Road, Moorlands and Davie Avenue; U.D.C. Electrically operated overhead travelling cranes surveyor. for Pyrmont “ B ” power station (Spec. 784). Coventry. —- Rebuilding hospital, Stoney March 7th, 1946. Coal-handling plant for Stanton Road; house governor, Coventry and Pyrmont “ B ” (Spec. 72).— Tenders (M el Warwickshire Hospital, Keresley. bourne). Droitwich.—Permanent houses (50)', Stalls Batley.—December 4th. Electricity Depart Farm estate; G. L. Robinson, borough engineer, ment. 11-kV Cable. (See this issue.) 105, Friar Street. Scotland.—December 10th. North of Scot East Retford.—Houses (51) and others later, land Hydro-Electric Board. H.v. and Lv. over for R.D.C.; B. D. Thompson, architect, 83, head lines in Lochalsh area. (November 9th.) Bridge Street, Worksop. Glasgow.—Transformer house, North Speirs Sheffield. — December 31st. Electricity Wharf; Scottish Agricultural Industries, Ltd. Department. Two 600-kVA transformers. Works extensions, Mountain Blue Street; (November 9th.) British Basket & Besto Co., Ltd. Skelton and Brotton.—November 30th. Elec Factory reconstruction, Sutcliffe Road; tricity Department. Three three-phase trans Farquarson Bros., Ltd. formers, with off-load tap-changing gear. Extensions, Possilpark tram depot (£13,883); (November 16 th.) M. Simpson & Co., Ltd. Southend-on-Sea.— December 3rd. Electricity Gosport.—Permanent houses (150), in pairs Department- L.v. cable. (November 9th.) and blocks of four, Bridgemary site; borough engineer, Town Hall. Orders Placed Great Yarmouth.—Permanent houses (70), Durham. — County Council. Accepted. North Denes estate; H. F. Dyson, borough Renewing and altering wiring at Easington engineer, Town HalL Institution (£407).— Dixon Barker & Sons. Hartlepool.—-Factory, for the Educational London. — Metropolitan Water Board. Supplies Association, Ltd. Accepted. Cables for filters at Hampton works Hebbnrn-on-Tyne. — Reconstruction of work (£444).—Aberdare Cables. shops for Palmers, Hebburn, Co., Ltd.; G. Wimpev & Co., Ltd., Pilgrim House, Pilgrim Northumberland.—County Council. Accepted. Street, Newcastle-on-Tyne. Electrical work in connection with the conversion of premises at Morpeth into a clinic and hostel Hendon.—Additions to factory, Endersleigh for illegitimate children (£667).— Reid, Ferens Gardens, for Tormo, Ltd.; W. F. Thorpe, 26, & Co. The Broadway, N.W.7. Warwickshire. — Education Committee. Ilkeston.—Houses (122), Cotmanhay estate; Accepted. Electrical work at Rugby Technical A. O. Marshall, borough engineer, Tow-n Hall. College (£620).— France’s Electric. Langleybury (Herts.).— Erection of annexe to St. Bartholomew’s Hospital; county architect, Contracts in Prospect Castle Street, Hertford. Particulars o f new works and building schemes for Leeds.—Adaptations at St. James’s Hospital the use of electrical installation contractors and (North), for maternity isolation unit and traders. Publication in this section is no guarantee infirm wards; superintendent of works, 125, that electrical work is definitely included. Alleged Beckett Street, Leeds, 9. inaccuracies should be reported to the Editors. Leicestershire.—Nurses’ home, Bosworth Park Alnwick.—Houses, Felton (20) and Sbil- Infirmary' (£26,500); conversion o f The Gables, bottle (50); R.D.C. surveyor. Melton Mowbray, for extension to Grammar Ancoats — Factor-/ additions, Lees Street, for School; and adapting Dower House, Quorn, Thos Hope. Ltd.; Jones & Dalrymple, Loughborough, as hostel for college (£4,700); architects, 178, Oxford Road, Manchester, 13. county architect, Leicester. Bedfordshire. — County camp for children at Leominster.—Houses (28), on three sites, for Great Gaddesden (£14,000); county architect, R.D.C.; G. Morris, builder, Ryelands, Leo Shire Hall, B edford. m inster. 766 E l e c t r i c a i TR e v ie w N o v e m b e r 23. 1945
Lindsey.—Two children’s homes (£9,420), ‘ Newcastle-under-Lyme.—Sunday school club Horncastle; county architect. County Offices, rooms and assembiy hall (£7,000); Rev. W. Newland, Lincoln. Norcross, Methodist Church, Westlands. Llandilo.—Permanent houses (30), in pairs. Poole.—Fish canning factory and cold Cor U.D.C.; W. S. P. Cotterell-, architect, 8, storage depot; Marshalls (Aberdeen), Ltd. Quay Street, Carmarthen. Rochdale.— Hospital; S. H. Morgan, borough London.—Flats at various estates (£116,000); surveyor, Town Hall. L.C.C. architect. Rugeley.—Pumping station, pump houses, Luton.—Departmental buildings (£45,000), etc., Brereton, for U.D.C.; A. H. S. Waters, Chaul End; F. Oliver, borough engineer, Town engineer, 25, Tfemple Row, Birmingham, 2. H all. Rutherglen. — Houses (600), Spital Farm Manchester.—Cinema, Oxford Street and estate; burgh surveyor. Mosley Street; A.B. Cinemas, Ltd., 30, Golden Sunbury-on-Thames. — Houses (69), Green Square, London, W .l. Lane, Beards Road and Alexandra Road, for Market Harborough.— Permanent houses (30), U.D.C.; Braddell, Deane & Bird, architects, Bowden Fields; surveyor, Council Offices, Victor House, 1, Baker Street, London, W.l. Northampton Road. Warwickshire. — Education office, Solihull; Middlesex. — Maternity accommodation police houses (£10,000); maternity home Kenilworth Road, Leamington (£11,500); and (£12,906), Chase Farm Emergency Hospital; Middlesex county architect. extensions, Monroe Devis Maternity Home, Stratford-on-Avon (£14,000); county architect, Monk Bretton.— Houses (20); Model Estates W arw ick. Development Co., Ltd., builders, Coronation Yeovil.—Permanent houses (60), East Coker, Street. Martock and South Petherton, for R.D.C.; Motherwell and Wishaw.—Proposed new Petter, Warren & Roydon Cooper, architects, public baths (£150,000); burgh surveyor. Old Oxford Inn, West Hendford, Yeovil. XEH PATEXTS Electrical Specifications Recently Published The numbers under which the specifications will be P. X. Fox.—“ Electrically heated hair waving printed and abridged are given in parentheses. or curling apparatus.” 14420. September Copies of any specification (Is. each) may be 3rd, 1943. (573009.) obtained from the Patent Office, 25, Southampton General Electric Co.. Ltd., N. R. Bligh, Buildings, London, W.C.2. D. M. Heller and L. C. Stenning.— Multi channel radio signalling systems.” Cognate A KT.-GES. Brown, Boveri & Cie.—“ High- applications 5651 42 and 9127 42. April 27th, voltage transformers, particularly instru 1942. (572918.) ment transformers.”’ 12538/43. August 4th, B. W. Hirsh and Imperial Chemical Industries. 1942. (573003.) Ltd.—“ Electrolysis of aqueous solutions.” Anglo-Iranian Oil Co., Ltd., and A. C. 5229. April 23rd, 1941. (572950.) Hartley.—“ Couplings for flexible tubes or Igranic Electric Co., Ltd., S. P. Maynard electric cables.” 9157. June 7th, 1943. and J. M. Bedford.—“ Direct current motor (572932.) control systems.” 15294. September 17th, J. L. Baird.—“ Television.” Cognate applica 1943. (572971.) tions 13887/43, 15851/43, 16413/43, 16581/43, B. Jablonsky.—“ Methods of and apparatus 19825/43 and 2370/44. August 26th, 1943. for treating articles under pressure with high- (573008.) frequency electric heating.” 10343. July 24th, D. G. E. Barrie.—“ Electrical connectors.” 1942. (573021.) 15386. September 20th, 1943. (572939.) H. Jackson.—“ Portable radio equipment British Thomson-Houston Co., Ltd. (General employing thermionic valves.” 5599. April Electric Co.). — “ Cathode-ray deflecting 27th, 1942. (572955.) means.” 15740. September 24th, 1943. W. W. Spooner.—“ Washing machines.” (573032.) 17151. October 19th, 1943. (573042.) C. S. Bull.—“ Seals or supports for con Standard Telephones & Cables, Ltd.— ductors for use with high-frequency currents.” Selenium paste and method of making and 4072. March 5th, 1940. (572981.) applying it for use in electric rectifiers.” Cognate Callender’s Cable & Construction Co., Ltd., applications 6160 43 and 6161/43. April 24th, and A. B. F. G. Richardson.—“ Mechanism 1942. (572999.) for producing or controlling the longitudinal Stratton & Co., Ltd., and H. N. Cox.— movement of electric cables during manufacture Insulated electrical connectors or terminals.” and installation and for other analogous pur 15382. September 20th, 1943. (572938.) poses.” 13964. August 26th, 1943. (572968.) C. S. Thomson.—“ Electrically energised Callender’s Cable & Construction Co., Ltd., luminous gas devices.” 7657. April 25th, Callender-Suchy Development, Ltd., P. V. 1944. (572977.) Hunter, L. G. Brazier and C. T. Suchy.— H. Webster and J. F. Bridge.—“ Safety “ Flexible electrical conductors.” Cognate apparatus for automatically stopping electrically applications 11900/43 and 7728/44. July 21st, propelled vehicles.” 7837. April 26th 1944 1943. (573002.) (572979.) A. C. Cossor, Ltd., and A. Levin.—“ Electric- H. E. W. West.—“ Electric power installations discharge devices.” 15304. September 17th, and engine starting arrangements for aircraft ” 1943. (573030.) 17843. October 28th, 1943. (573074.) For:—Control and Signal Uses, Electro-Plating, Radio For nearly 20 yearn tee have pioneered the use Magnetic Applications, of Rectifiers in many (aids. W rite fo r technical Water Purification, data and ilescriptive lists ¡¡lancing their application Laboratories, Lift Control, to varied branches of A Multi-Circuit Rectifier Cubicle, industry and science . Electro Medical. having Metal Rectifiers and Trani- formers, housed In Vapour-Tight Oil-Filled Tanks for working in a F. (. HEAYBERD & (0. LTD. very corrosive atmosphere. Head O ff i c e : 2 8 , RUSSELL SQUARE, W.C.1. Telephone: Mu s. 6412
MAKE THE BEST ^ OF BOTH WORLDS^ HIGH CONDUCTIVITY £
Designers need no longer be limited by the poor mechanical strength of copper castings nor by the low con
HIGH ductivities of the brasses and bronzes. STRENGTH The development of Mallory high con ductivity copper alloys makes available cast materials that retain the high MALLORY CASTINGS current-carrying capacity of copper # and combine it w ith the strength and Fuller details of Mallory 3 and hardness of steel. Lighter, yet stronger castings are thus other Mallory alloys are given in our technical booklets which will possible for the current-carrying parts of switchgear, arc and be sent on request induction furnaces, resistance welding machines, transformers MALLORY and other electrical equipment. MALLORY METALLURGICAL PRODUCTS LIMITED An Associate Company of Johnson, Matthey & Co. Ltd. 78 Hatton Garden, London, E.C.I. Telephone: HOLborn 5027 56 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
THE WONDERFUL LAMP -* W.G.O. t«oz,i/cr
A new era of brightness in the home,
office and factory! Brightness, cheerful
ness, cleanliness, fresh air, good health
and good lighting are the order of tf§s
day. Good lighting is a tonic — especially
with Osram!.
Advt. o f The General Electric Co., Ltd., Magnet House, Kingsway, London, W .C .2 N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w 5 7 CLASSIFIED ADVERTISEMENTS A D V E R T IS E M E N T S for insertion in the following R E P L IE S TO advertisements published under a Friday s issue are ‘accepted up to F irst P ost on . Box Number if not to be delivered to any particular M onday, at Dorset House, Stamford Street, London, S.E .l. firm or individual should be accompanied by instruc tions to this effect, addressed to the Manager of the T H E C H A R G E for advertisements in this section ELECTRICAL REVIEW. Letters of applicants in 13. 2/- per line (approx. 7 words) per insertion, 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 this counts disclosed. All replies to Box Numbers should be as six words and there is an additional charge of 6d. addressed to the Box Number in the advertisement, for postage of replies. c/o ELECTRICA L REVIEW , Dorset House, Stam S IT U A T IO N S W A N T ED . — Three insertions ford Street, London, S.E .l. Cheques and Postal under this heading can be obtained for the price of Orders should be made payable to ELECTRICAL two if ordered and prepaid with the first insertion. REVIEW LTD. and crossed. Original testimonials should not be sent with applications for employment.
OFFICIAL NOTICES, BOROUGH OF HESTON AND ISLEWORTH TENDERS, ETC. Electricity Department
BOROUGH OF BATLEY Appointment of Deputy Borough Electrical Engineer and Manager HE Batley Corporation invite tenders for Two lengths T (approximately 500 yards in all) of E.H .T. 11.000-volt rflH E Corporation of Heston and Isleworth invite appli- Paper Insulated Plain Lead Sheathed Cable served with -1- cations for the position of Deputy Borough Electrical fireproof covering. Engineer and Manager, at a commencing salary of £600 Specification and form of tender may be obtained from per annum, rising by £25 per annum to a maximum of the B'orough Electrical Engineer, Electricity Works, George £700 per annum, plus cost of living bonus (at present Street, Batley. £59 16s. per annum) and a motor car allowance of £100 Tenders should be sent to the undersigned in plain sealed per annum (at the discretion of the Council). Candidates envelopes, bearing no mark to indicate the sender, should preferably not be more than 40 years of age. They endorsed “ E.H.T. Cable.” and are to be delivered not must have held executive positions of considerable respon later than noon on Tuesday. December 4th, 1945. sibility and be possessed of sound administrative ability, The Corporation does not bind itself to accept the lowest and must be a Member or Associate Member of the Insti or any tender. tution of Electrical Engineers. THOS. E. C R A IK , Town Clerk. The person appointed will be required to carry out such Town Hall, Batley. 3478 duties as may be assigned to him, to devote his whole time to the duties of his office, and to reside within the Borough. He must have had sound experience in genera tion and distribution of electricity, both A.C. and D.C. SITUATIONS VACANT ______The appointment is subject to the Local Government None o1 the vacancies for women advertised in these Superannuation Act, 1937, and the selected candidate will columns relates to a woman between 18 and 40 unless such be required to pass a medical examination. The position woman (a) has living with her a child o1 hers under the may be terminated by two months’ notice on either side. age ol 14. or (6) is registered under the Blind Persons Acts, Applications for the position must be made on a form or (c) has a Ministry of Labour permit to allow her to to be obtained from the Borough Electrical Engineer and obtain employment by individual effort. Manager, 1 1 , Staines Road, Hounslow, and addressed to the undersigned, endorsed “ Deputy Borough Electrical Engineer and Manager,” accompanied by not more than CITY OF NOTTINGHAM three recent testimonials, to be received not later than Saturday, 8th December, 1945. Electricity Department Canvassing, directly or indirectly, will be deemed a disqualification. Appointment of Three Assistant Shift Control Engineers The Ministry of Labour and National Service (Technical and Scientific Register) have given permission under the Control of Engagement Order, 1945, for the advertisement A PPLICATIONS are invited from suitable candidates of this vacancy. for the position of ASSISTANT SH IFT CONTROL HAROLD SWANN, Town Clerk. ENGINEER for North Wilford Generating Station (Plant 3410 Capacity 88,500 kW). Applicants must have experience in the control of large Electric Supply Systems and Parallel Operation of Turbo- BOSTON & DISTRICT ELECTRIC SUPPLY CO. LTD. Alternator Plant with the Grid System. They must be technically qualified up to at least Ordinary National Assistant District Engineer Certificate in Electrical Engineering and have had a good general engineering experience. PPLICATIONS are invited for the above position. The salaries for each of the three positions will be in A Applicants should have experience in the operation accordance with the N .J.B . Schedule, Class H. .Grade 10. of a high tension system in a Rural Area and be conversant Extensions are in progress which will increase the with, the maintenance of overhead lines and associated capacity of the Generating Station by 60,000 kW. and equipment. which should be in operation by September. 1946. Further Preference will be given to applicants who have also extensions scheduled are 53,000 kW for 1947 and 52,500 kW had some knowledge of dealing with consumers’ require ments in the matter of installations and the equipment for 19*9- , , . , , ,. The appointments will be subject to the provisions of of farms, as the successful applicant will be required to the Local Government Superannuation Act. 1937, and the take charge of a section of a Rural District and deal with successful candidates will be required to pass a medical most matters arising therein, other than new construc tion work. eXAppücatkins. giving full details of training and experi Applications, giving age. education, details of training ence and including not more than three testimonials, must and experience, together with commencing salary required, be dehvered to the undersigned by Friday. November and accompanied by copies of recent testimonials, should be sent to the above Company at the address given below 30th 1945? and must be endorsed Assistant Shift Control not later than the 8th December. 1945. The Ministry of Labour and National Service. Technical and Scientific Register, have given permission under the Control of Engagement Order, 1945, for the advertisement for ^^advertisement of these vacancies. of this vacancy. J . E. RICHARDS. Town Clerk. Besco House, Market Place. 3366 November 7th. 1945. Boston. Lincs. 3431 58 E l e c t r i c a l R e v ie w N o v e m b e r 23, ls>45
BOROUGH OF BASINGSTOKE BOROUGH OF WILLESDEN Electricity Department Electricity Department Appointment of Mains Assistant Appointment of InstallatioiT Superintendent A PPLICATIO NS are invited for the above appointment. PPLICATIO NS are invited for the above position from Applicants must have had experience in the Mains A engineers who have had a sound technical education Department of a Public Electricity Supply Undertaking. and practical experience in all branches of installation Applicants must have good technical knowledge and work, who will be responsible for the preparation of Practical experience in the laying and maintenance of estimates and forms of tender in connection with lighting, E.H.T. and L.T. Underground Mains. Experience with heating, power, equipment, and installations for domestic, overhead lines and converting plant will be an asset. commercial and industrial consumers, and responsible also Salary in accordance with the National Joint Board for the installation, testing, servicing and maintenance of Schedule. Class D, Grade S (at present £356 per annum). all such equipment and installations upon consumers’ The appointment will be subject to the Council’s Sick premises. Applicants must be Corporate Members of the 1 ay Scheme and the Local Government Superannuation Institution of Electrical Engineers. Act. 1937. The selected candidate will be required to pass The appointment will be subject to the provisions of the a medical examination. Local Government Superannuation Act. 1937. after a Applications, endorsed “ Mains Assistant.” stating age. probationary period of six months. The selected applicant full particulars of training, qualifications and experience, will be required to pass a medical examination. The salary accompanied by copies of not more than three recent and conditions of service will be in accordance with the testimonials, should be forwarded so as to reach the under schedule of salaries and conditions of employment. National signed not later than first post on Wednesday. 5th Decem Joint Board of Employers and Members of Staff. Elec ber. 1945. tricity Supply Industry. Class H. Grade 4. at present £638 Canvassing, either directly or indirectly, will be a dis per annum, plus a car allowance in accordance with the qualification. Council’s scale, at present £75 per annum. The Ministry of Labour and National Service (Technical Applications must be made on the application forms to and Scientific Register) have given permission under the be obtained from the undersigned, and should be returned Control of Engagement Order. 1945. for the advertisement to the undersigned, together with copies of three recent of this vacancy. testimonials, not later than 17th December. 1945. endorsed M EIRION O. JO N ES. ” Installation Superintendent.” Municipal Buildings, Town Clerk. Canvassing in any form is prohibited and will disqualify. Basingstoke. This advertisement is published by permission of the 16th November. 1945. 3467 Ministry of Labour and National Service under the Control of Engagement Order. 1945. W. T. P IR IE , BOROUGH OF LEYTON Town Hall. Town Clerk. Dyne Road. N.W.6. Electricity Department 13th November. 1945. 3422 Appointment of Mains Superintendent BOROUGH OF RADCLIFFE A PPLICATIONS are invited for the above appointment from electrical engineers who have had considerable Electricity Department experience in an Electricity Supply Undertaking in the layout, operation and maintenance of H.T. and L.T. Cable Jointer (Plumber) systems, including static and rectifier substations from 6.600-volt bulk supply. Also administrative experience A PPLICATIONS are invited for the position of Cable and knowledge of street lighting. Jointer in the above Department. Wages and work Corporate Membership of the Institution of Electrical ing conditions in accordance with the Schedule of the Engineers is desirable. District Council No. 3. North-Western Area. Electricity Salary in accordance with Grade 3. Class F. of the Supply Industry. Zone A. Present rate 26.45d. per hour National Joint Board Schedule, at present £612 3s. per for a 47-hour week. annum. Applicants must have experience in high and low tension The appointment will be subject to the Local Govern mains jointing, feeder pillar, network boxes and substation ment Officers Superannuation Act. 1937. and the successful H.T. & L.T. boards. applicant will be required to pass a medical examination. The appointment will be a designated post under the Applications, endorsed ” Mains Superintendent.” stating Local Government and Other Officers Superannuation Act. age. qualifications and experience, accompanied by copies 1922. mid the successful candidate will be required to pass of three recent testimonials, should be delivered to the a medical examination. Borough Electrical Engineer and Manager. Electricity Applications, stating age and experience, and accom Offices. Cathall Road. Leytonstone. E .ll. not later than panied by copies of not more than three recent testimonials, Monday. 3rd December, 1945. endorsed " Jointer.” should reach the undersigned not If the successful candidate is serving with H.M. Forces later than MONDAY. DECEMBER 10th. 1945. application for his release will be made immediately. The Ministry of Labour and National Service have given Canvassing, directly or indirectly, will disqualify. permission under the Control of Engagement Order. 1945. D. J. OSBORNE. for the advertisement of this vacancy. Town Hall. Town Clerk. H. A. FOX. Leyton. E.10. 3348 Town Hall. Town Clerk. Radcliffe. Manchester. November, 1945. 3457 MID-LINCOLNSHIRE ELECTRIC SUPPLY CO. LTD.
Meter Mechanician ASSISTANT MAINS ENGINEER
A PPLICATIONS are invited for the appointment of a A PPLICATIO NS are invited from Graduate Members c Meter Mechanician at the rate of 2s. 2id. per hour I.E .E .. who must have experience in the laying for a 47-hour week, for Class A Polyphase Testing Station. jointing, testing and maintenance of 3-phase E.H .T. an Applicants must have had experience in repairing all types L.T. cables and overhead lines, maintenance and operatio of quarterly and prepayment meters, time switches, of static substations (indoor and outdoor types), and keer maximum demand attachments, etc. ing the necessary records in connection with the abovt The successful candidate will be required to participate This_ is a small Urban and Rural Undertaking in Soutl in the Company’s Superannuation Scheme. \\ est England, where the housing problem is acute, an Applications in writing, giving details of training and preference will be given to a young single man. Sale experience, accompanied by copies of recent testimonials, experience will be an advantage. Salary £360 per annun endorsed “ Meter Mechanician.” should be addressed to Apply, giving full details of age, technical and practicr the Meter Superintendent. Mid-Lincolnshire Electric Supply training, whether married or single, to Southern Area Company Limited. North House. Grantham. Lincolnshire, Electric Corporation Limited. 37. Alexandra Hoad, Epson not later than the 7th December. 1945. Surrey. The Ministry of Labour and National Service have given The Ministry of Labour and National Service have give permission under the Control of Engagement Oder, 1945. permission under the Control of Engagement Order 194: for the advertisement of this vacancy. 3420 for the advertisement of this vacancy. ' 337 November 2 3 , 1 9 4 5 E l e c t r i c a l R e v ie w 5 9
BOROUGH OF BRIDLINGTON BOROUGH OF OARWEN Electricity Department Electricity Department Mains Engineer Appointment of Mains Assistant PPLICANTS for the above position must have had PPLICATlO NS are invited from suitably Qualified A sound technical training and be experienced in work \ candidates of experience for the appointment of Mains on the layout, connection and maintenance of E.H .T. and Engineer in tne Electricity Department. Salary in accord L.T. distribution systems, including substations. E x ance with the National Joint Board Schedule. Grade 6. perience in change-over work will be an added recom Class C. at present £382 per annum. Candidates must mendation. hare had a sound technical training, togetner with a prac Salary will.be in accordance with the N .J.B . Schedule. tical experience in the laying, maintenance and operation Class C. Gradé 8 (commencing £329 per annum». of 11-kV E.H .T. and three-pnase L.T. underground cable , The successful candidate will be required to pass a systems. medical examination and contribute to the Council’s Super The appointment is subject to the provisions of the annuation Scheme. Local Government and Other Officers Supetannuatiou Act. Applications, giving full details of age. training and 1937. and the selected candidate will be re Q U ire d to pass | experience, together with copies of three testimonials, are a medical examination. to be endorsed “ Mains Assistant." and must reach the Applications, endorsed ** Mams Engineer." should be undersigned by Saturday. December 8th. 1945. delivered to the Commercial Manager. Electricity Depart The Ministry of Labour and National Service. Technical ment. Brett Street. Bridlington, net later than Monday, and Scientific Register, have given permission under the the 3rd December. 1945. accompanied by copies of two Control of Engagement Order. 1945, for the advertisement recent testimonials. of this vacancy. Canvassing, directly or indirectly, is prohibited and will ALEX. WATSON. A.M.I.E.E.. disqualify an applicant. Electricity Works. Borough Electrical Engineer. This advertisement is published by permissiou of the Robin Bank Road. Darwen. 3468 Ministry of Labour and National Service under the Control of Engagement Order. 1945. GEORGE MELVIN. BOROUGH OF GRAVESEND Town Hall. Bridlington. Town Clerk. Appointment of Borough Electrical Engineer 16th November. 1945. 3461 and Manager PPLICATIONS for the above appointment are invited LINCOLN CORPORATION A from engineers who are experienced in the manage ment and administration of an Electricity Undertaking. Electricity Department Candidates must have been engaged in the business of electricity supply for an extended period and have had Appointment of Senior Demonstrator practical experience in the generation and distribution of electricity. The salary will be in accordance with the »Y permission of the Ministry of Labour and National Agreement made by the National Joint Committee of Local B'f Service, under the Control of Engagement Order. 1943. Authorities and Chief Electrical Engineers, dated 9th July. applications are invited for the position of FEM ALE 1941. The present- salary according to scale is £1.422 per SENIOR DEMONSTRATOR for the above Department. annum, and this salary will be paid from the date of Applicants must have a good knowledge of cookery and taking up duties. The appointment will be subject to the be able to demonstrate all types of appliances. provisions of the Local Government Superannuation Act. Candidates having specialised in war-time cooker.- and 1937. and the person appointed will be required to pass a having co-operated with the Ministry of Food will receive medical examination. special consideration. . Application forms for the appointment may be obtained Salary in accordance with the Corporation s scale. £loO- from the undersigned and must be returned by Eriday. g n n - bonus at present £4S 2s. 30th November. 1945. Applications, giving full particulars, stating age. whether Canvassing, either directly or indirectly, will disqualify. named or single, should be addressed to the undersigned H. H. BROWN. not later than the 1st December. 1945. 4. WoodviHe Terrace. Town Clerk. F. NFTWEY.Gravesend. MXE.E.. Kent. Electricity Department. Engineer and Manager. 13th November. 1945. 3432 Braytord Side North. Lincoln. 008O PORTLAND URBAN DISTRICT COUNCIL
COUNTY MENTAL HOSPITAL. CHESTER FTF. above Council invite applications from suitably T qualified persons for employment in their Electricity Undertaking as p p l i c a t i o n s invited for post of d e p u t y to (a) Electrician. A RESIDENT ENGINEER. Salary £400 by £25 to (b) Plumber Jointer. :450 per annum, plus tonus now £1 3s. a week. Appoint - nent subject to provisions of Asylums Officers ¡super Wages in accordance with the D .J.I.C . Schedule. No. 1 1. annuation Act. 1909. Committee intends to build, as soon South Coast Area. . is possible, a house which wili_ become an emo.ument. Applications in writing, stating age. experience and Pending occupation of house. £75 per annum Irving-out giving names and addresses of two persons to whom iBowauce payable in lieu. reference m a y be made, should be submitted to the under Candidates should not be over 40. have served an signed as soon as possible. ipprenticesnp as Mechanical and or Electrical Engineer, Applicants in the age group lS-oO years, except Class A md are expected to hold a Board of Trade or National release men. should place their applications through a local ?ertirieate in engineering or other equivalent Qumihc.it ions- office of the Ministry of Labour and National Service. Experience in maintenance of Steam Raising Plant. Diesel IVOR G. EVANS. Engines and Electrical Power Plant needed. Closing aate Electricity Department. Electrical Engineer. list December. 1945. Application forms obtainable tram Council Offices. Portland. Dorset. Hedkal Superintendent- . . 15th November. 1945. 3460 This advertisement is published by permission ot the tfinistry of Labour and National Service under tne Control ¡1 Engagement Order. 1945. BOSTON 4 DISTRICT ELECTRIC SUPPLY CO. LTD. i PPLICATION S are invited for the following vacancies: RAWLINGS BROS. LIMITED ^ PLU M BER JO IN TER used to work up to 11.000 (.Established 1887) volts. Rate 2s. 3id. per hour. METER TESTER MECHANIC. CLASS 1. for Type A Badi--> Service Engineers and Electricians. nan-polyphase testing station. Rate 2s. 2£d. per ' L ia s A ex-Sav5cemen and these m * subject to hour. trot of Engagement Order invited to appty to I h- Ministry .if Labour and Nat: nal Service have given H. J. Eickman. pcrmissii n under the Control of Engagement Order. 1945. EAWTXSC.S BEO S. TTMIT El). for the advertising of these vacancies. So. Gloucester Bead. S- Applications to the above Company at Besco House. (oppoeue Gloucester Bead station’. 3308 Boston. Lincolnshire. 3430 60 E l e c t r i c a l R e v i e w N o v e m b e r 23, 1945
/YO U N TER Assistant, essential good knowledge of the ELECTRICAL POWER ENGINEERS' ASSOCIATION ^ trade. Class A ex-Serviceman. State experience, age. salary, etc.. to—General Manager. Sloan Electrical NOTICE Co. Ltd.. 41. Kingsway. W.C.2. 3466 T A E A F Aids. Experienced men required for final assemb- HESTON AND 1SLEW0RTH CORPORATION ling and testing, also for repairs. Permanent positions for suitable applicants. Under 18. over 5 1. or Class A Appointment of Deputy Borough Electrical Engineer ex-Servicemen only. Apply—Fortiphone Ltd.. 33, Cope land Road. Rye Lane. Peckham (3rd floor. Block A). 3377 IJIH E National Executive Council of the above Associa- T A ESIG N E R required for A.C. and D.C. machines by tion desires to point out to all intending applicants ^ well-known firm in Eastern Counties. F.H .P . experi for the above position that, under the National Joint ence desirable. Applications from men over 51 or Class A Board Agreement, the minimum commencing salary should ex-Servicemen only. State age. experience and salary.— be £810 per annum. Box 3357. c/o The Electrical Review. ALL ENGINEERS, WHETHER ENGAGED IN THE TARAUGHTSM EN and Estimators with experience in ELECTRICITY SUPPLY INDUSTRY OR NOT. ARE F ' layout of lighting, heating and power schemes, and URGENTLY REQUESTED TO INCLUDE THE ABOVE installations in restaurants and factories. Class A ex- CONDITION IN ANY APPLICATION MADE FOR Servicemen. or men over 5 1 years of age. Write, giving THE APPOINTMENT REFERRED TO. details of experience, age and salary required, to—Chief Draughtsman. Electrical Dept., J. Lyons & Co. Ltd.. W. ARTHUR JONES. A.M.I.E.E.. Cadby Hall. W .14. 3429 General Secretary. TARAU G H TSM EN. Electrical and Mechanical, required Electrical Power Engineers’ Assn. -U by large electrical engineering firm in Midlands. Men ______34 11 becoming available for civil employment under Class A demobilisation are invited to send particulars stating age. A N experienced Estimating and Supervising Engineer technical qnalifications and industrial experience to—Box required all branches lighting and power distribu No. 231. 8. Serle Street. London. W.C.2. 3444 tion schemes, preparation of specifications. Permanency. TARAUGHTSMEN. under 18. over 51, or Class A ex- goocT prospects. Applications only from those exempt F ' Servicemen, wanted for N.W. London. Some ex from the provisions of the Control of Engagement Order. perience with electric motors desirable.—Box 3281. c/o French Limited. 79. Broad Street (entrance The Electrical Review. Sheepcote Street). Birmingham, 340S TARAUG HTSM EN (3) required immediately by leading yl N old-established company in the London area, manu- radio manufacturers in South-East London area for facturing telephone cables, requires an engineer with design department working on radio and television equip experience of works and production organisation, and ment. previous experience essential. Applications from control of personnel, in the capacity of Assistant Works Class A ex-Servicemen and others exempt from M.O.L. Manager. Experience of the industry, while valuable, is control only. Write, stating age. experience and salary not considered the first requisite, as the company will required, to—Box 7901. A.K. Advg., 212a. Shaftesbury arrange facilities for a period of special training. The Avenue. W.C.2. 3367 prospects are excellent and a salary commensurate with LEC TRIC A L Fitter. Experienced assembly and repair the experience and qualifications of the selected applicant E motors. 1 to 50 h.p. Good employment conditions. will be paid. The appointment is permanent and pension Class A ex-Serviceman. or otherwise exempt.—Industrial able.—Box 3349. c/o The Electrical Review. Electrical Co. Ltd.. Offord Street Works. London. N .I. 3424 T ^ LE C T R IC A L Fitter experienced dismantling, overhaul A RM ATU RE Winder. 5 to 50 h.p., A.C.. D.C. Class A and assembling of all types electric motors. East ex-Serviceman. Good employment conditions. Also Woman or Girl for similar but lighter work, and Boy to London area. Class A ex-Servicemen or otherwise train.—Industrial Electrical Co. Ltd.. Offord Street Works. exempt M.O.L. control.—Box 3390. c/o The Electrical London. N.I. Review. 3423 T ^LE C T R IC IA N - Wiremen for installation and main- A RM ATURE Winders, experienced all classes A.C. and tenance work. Class A ex-Servicemen or otherwise D.C. jobs. Class A ex-Servicemen or otherwise exempt from Ministry of Labour control.—C. F . Parkinson. exempt M.O.L. control. Permanencies for suitable men. 114 . West Street. Boston. Lincs. 7993 —Service Electric Co. Ltd.. Abbey Mfg. Estate. Alperton. T^LECTRICLAN-W iremen. Three capable and energetic Telephone. Wembley 0194. 49 men required for Essex factory. A.C. and D.C. in A RM ATU RE Winders required for all types of A.C. stallation. rearrangement and maintenance. Fault location “ ■ and D.C. rewinds, permanent position, tip-top rates ability and experience of A.C.-driven machine tools an for first-class men. good working conditions with paid advantage. Permanency to suitable men. Week-end over f ys" ^ ass ex-Servicemen or otherwise exempt time and occasional night work. District rates. Class A M £2?tro1- Write particulars of experience, etc. to ex-Servicemen or over 51.—Box 3421. c/o The Electrical — Box <935. c/o The Electrical Review. Review. A RM ATURE Winders used to repair work, for S.W. T^LECTRICIANS and Assistants for work in London ^ London. All classes A.C. and D.C. jobs. Good con and Provinces. Class A ex-Servicemen or otherwise ditions. Permanency for right type of men. Class A exempt from Ministry control. Write or apply to—F. H. ex-Semcemen or over 51.—Box 7852. c/o The Electrical Wheeler i: Co. Ltd.. 39. Victoria Street. S.W .l. 3397 Review. T^LE C T R IC IA N S and Assistants required for good-class A SS IS T A N T Works Engineer required for industrial installations. London and Provinces. Class A ex- undertaking Outer London area. Experience essential Servicemen. otherwise exempt from Ministry of Labour m mechanical and electrical engineering. Builders' experi control. Permanent position.—Giles (Electrical Engineers) ence an asset. Applications from Class A ex-Servicemen Ltd.. 9 and 1 1 . Victoria Colonnade. Southampton Row. and others exempt from M.O.L. control only. Write lull W.C.l. Holborn 5726. 7999 details in confidence, stating qualifications, age. experience T^LECTRICIANS and Assistants wanted. Class A ex- and salary required, to— Box 7904, A .K . Advg.. 212a Servicemen or over 51. Permanency to right men.— Shaftesbury Avenue. W.C.2. ’ 3368 J . H. Plant Ltd., 99. St. Martin s Lane. Charing Cross. W.C.2. 7946 T>U YER required with previous experience in the radio T ^ LEC TRICIA N S and Electricians’ Mates. Men exempt or associated light electrical industries bv established and progressive company of small transformer manufac from Ministry of Labour control, or Class A ex- turers. London area.—Box 3448. c/o The Electrical Review. Servicemen. are invited to communicate with—Powerlite Electrical Installations Ltd.. Windsor House. Victoria /CLERICAL Assistant. Class A ex-Serviceman, for Street. S.W .l. Telephone. Abbey 1319 . 3394 , . Stores Office. Must have thorough knowledge of all electrical material. Apply—London Electrical Company. T^LECTRICTANS and Mates (exempt from M.O.L. 92. Blackfnars Road. S .E .l. 24 control) wanted Central London, for general instal lation and repair work. Every consideration and per /COMPETENT Armature Winder wanted. Able to teach manent job to reliable and conscientious workers.— ^ others and take control of small works. Suitable man Waddington & Goodwell Ltd.. 34/35, Hatton Garden. would eventually have complete control of depart E.C.l. 7945 ment and. when proved satisfactory, house would be pro LriLECTRICIANS required for maintenance and repairs. vided Rotherham area. Must be exempt from M OL Applications only from those over 51 and Class A control.—Box 3270. c/o The Electrical Review. ex-Servicemen. Reply stating salary and experience.— /YO ST and Record Clerk (Female) required with kuow- Box 3415. c/o The Electrical Review. v -' ledge of electrical contracting. Permanent position T^LECTRICIANS urgently wanted. Installation and Write, givmg full details of experience, age and salary repair work. D.I.C. rates of pay and conditions. required, to—Giles (Electrical Engineers) Ltd.. 9 and 1 1 . Class A ex-Servicemen or over 51 only. Apply—Boroueh Victoria Colonnade. Southampton Row. W .C.l. SOoi Electrical Engineer. 17/18. High Street. Rugby 3479 r S o j e m b e r 2 3 , 1945 Electbucal R eview 6 1 . -A refioir.ed jy East Anglian Electne CEELM_lY ETtccmrrTim !» «gagr. in «mo.I ooncmct.tr s X-» »ippiy Oj Lai. Flnhnrougn Had. - .«mari.^ F business, afafe 10 estimate and — dbg up accounts. » 11 « 5 « «wk- Eu>. of pay 2a aíu. p*r unur. Permanency. Applications fern *Zlae A ex-hervic.emen ¿gpiicants mould oe C b s A exhervcemea >i¿amr» tr those over 5 1 tmy. W rxe j l di^r insaace at—Mr. ftnm Lacear rrwfiwl. 243d O'Rebbi, 0 1 HL Hitilidge. '.a . Bedteci E5II. Baiham. 1 / LE£-TED.Ta> aognoKd by ^na,! estaolistied x n - S.W.12. 3
X > E A L L Y gootf man required to build up and operate APPOINTMENTS FILLED -1 -«' Armature Rewinding section of established electrical engineering concern on Sussex coast. One prepared to Dissatisfaction having been so often expressed that un work and also train others. Sound position with excellent successful applicants are left in ignorance of the fact that future prospects. Applications from those over 51 and the position applied for has been filled, may we suggest Class A ex-Servicemen only. State salary required. that Advertisers notify us to that effect when they have References.—Box 3413, c/o The Electrical Review. arrived at a decision? We will then insert a notice free T > EQ U IRED an Electrical Engineer for gold mines in of charge under this heading. South India with a diploma or degree in Electrical OX 7595—Representative; Box 7596—Assistant Sales Engineering and having fairly extensive experience of the B Manager; Box 3188—Production Controller; Wallasey erection and maintenance of heavy electrical plant and Corporation—Senior Demonstrator. distribution systems. Preference given to a man with some experience of steam and Diesel generating plants and power station operation. Write with full details of SITUATIONS WANTED age, training and experience to— “ Y .O ..” c/o Streets, 110 . Old Broad Street. E.C.2. 3462 A POST WITH SCOPE FOR A YOUNG ENGINEER X > EQ UIRED . Salesmen. Storekeeper and Assistants for radio retail stores. Applications only from those over 51 and Class A ex-Servicemen.—Box 3416. c/o The Elec .Sc. Tech. Electrical Engineer specialised in Instru trical Review. B ments Ex Metrovick Apprentice. Production A LES Engineer, preferably with connection, required experience. Eight years’ responsible training, administra S by large English electrical manufacturing concern tive and intelligence work in R .A .F . Squadron-Leadei for their Scottish Branch. State education, technical for last 4 years. Twice mentioned in despatches. qualifications, age, and salary required.—Box 3336. c/o Excellent references. I wish to re-enter the electrical The Electrical Review. industry in a responsible post with opportunity for ad Q E C R E T A R Y (Female), capable and experienced, for vancement and improving a keen engineering aptitude.— ^ small pleasant office. Victoria (no Saturdays). Short Box 7932, c/o The Electrical Review. hand, typing, telephone, book-keeping. Knowledge of general engineering terms an asset. Write, giving full COMMERCIAL AND/OR SALES MANAGER particulars and salary required, to—Box 3435, c/o The Electrical Review. Q EN IO R Draughtsmen required by switchgear manufac- A D V ER T ISER , aged 43, of proved ability to handle a ^ turers. Preference will be given to applicants experi wide range of products, desires change to pro enced in E.H .T. switchgear and mining gear design and/or gressive manufacturer. Fourteen years’ all-round detail. Association rates offered; 40-hour week. Applica m anagerial experience, organizing and controlling sales, tions are invited from Class A ex-Servicemen and others publicity, estimating, costing, buying, labour and staff. exempt from M.O.L. control only. Reply, giving full Good technical background, some works experience and particulars of experience, etc.. to—Switchgear & Cowans d.o. training. Reasonable salary. Midlands preferred Ltd., Elsinore Road, Old Trafford. Manchester. 16. 3453 but not essential.—Box 8012, c/o The Electrical Review. QHOWROOM Assistants required for industrial, com- ^ mercial and domestic showrooms, with radio servicing facilities. Class A ex-Servicemen, otherwise exempt from TO PRINCIPALS OR MANAGING DIRECTORS Ministry of Labour control. Apply in writing in first instance, stating age. experience, salary required, to— 1\ T A JO R . Royal Engineers (T.A.), Class A release, Giles (Electrical Engineers) Ltd., 9 and 1 1 . Victoria Colon -L*-1- with 23 years’ experience in design and production nade, Southampton Row. W .C.l. 8000 of electrical apparatus, desires executive position. 0 WITCHGEAR manufacturers require Engineer for Sales Experience of works management, good administrator ^ and Estimating section. A.C. and D.C. air and oil and organiser. break, L.T., H.T. switchgear and switchboards, automatic Intimate knowledge of domestic appliances, telephone switchgear, etc., Manchester district. Class A ex-Service and signalling apparatus & systems, and electrical instru or otherwise exempt from M.O.L. control, or over 51. ments. Applications, in confidence, should state age. previous Energetic and ambitous with plenty of initiative. experience and salary required.—Box 3455, c/o The Elec Replies treated in confidence.—Box 7972, c/o The trical Review. Electrical Review. FT1ECHNICAL Assistant to Electrical Engineer required in Central London architects’ office. Applications A Technical Engineer. A .I.E .E ., M .I.E.I. (39). extensive only from Class A ex-Servicemen and others exempt from experience design, purchasing, inspection, production M.O.L. control. Give details of technical education, ex (modern tooling methods) in domestic apparatus, small perience and salary required to — Box 7917. c/o The electric motors, switchgear. Executive position with respon Electrical Review. sibility and scope required. West London or Surrey. Ex rp E L E V IS IO N and Radio Draughtsmen required for pro- cellent references. Present position 10 years. Write—Box gressive growing firm, with good prospects. Applicants 7949, c/o The Electrical Review. should be exempt from the provisions of the Control of Engagement Order. 1945. Class A release men with ex A Technical Engineer, age 27. requires progressive perience welcomed. Write fully, in confidence, giving age. position demanding drive, initiative and organizing experience and salary required, to—O-Personnel Officer. ability. 4è years’ experience in design, manufacture, R.F. Equipment Limited. Amersham, Bucks. 3452 and test of Automatic Control Gear and Industrial Switchgear. Particulary interested in contactors and TT1WO Armature Winders, conversant with split phase the acceleration of motors, and keen on traction and lift -1- winding of A.C. stators. Good prospects and salary. work. Fluent German and Italian. Release obtainable. Applications from those over 51 and Class A ex-Servicemen London preferred. Reply—Box 8005, c/o The Elec only. Apply—Box 3341, c/o The Electrical Review. trical Review. rTIWO Substation Attendants at Dorking and one at A 1 Leatherhead, experienced in the operation and control Young Foreman, single, wide experience of installa- of H.T. and L.T. switchboards, rotary converters and tions and maintenance, wants position abroad or on rectifiers. Shift work of 48-hour rota; No. 9 Area J.I.C . the Continent.—Box 7989, c/o The Electrical Review. rate of pay, £3 19s. per week, plus 6d. per hour war bonus. A BOUT to be dermobbed, young man. 32, keen and Applications from those over 51 or Class A ex-Servicemen conscientious. Comprehensive experience, 10 years only to—Senior Area Engineer, London and Home Counties with three leading electro-mechanical instrument firms. Joint Electricity Authority. 42 York St.. Twickenham. 3442 Including 5 year apprenticeship in all shops and latterly in test room, experimental and inspection departments, TTACAN CIES are available for men released in Class A desires permanent post offering good prospects.—Box » who have had experience on Instrument Work. Pre 7984, c/o The Electrical Review. ference will be given to those who possess some theoretical knowledge. Apply, stating experience, training, age and A D V ER T ISER desires change, seeks post as Sales wages required, to—Cambridge Instrument Company Ltd.. Manager with progressive firm. Excellent connection Sydney Road. Muswell Hill, N .10. 46 with electric motor mfrs., telephone and radio mfrs., also electrical wholesalers in London and district. Owns car. 'V^nrAREHOUSEMAN, essential good knowledge of the Box 7987, c/o The Electrical Review. * * trade. Class A ex-Serviceman. State experience, age. salary, etc.. to— General Manager. Sloan Electrical A D V E R T IS E R (35), for many years in well-known Co. Ltd., 41, Kingsway, W.C.2. 3465 contractors office, desires change. Thoroughly ex perienced in preparation of tenders and administration Y\^AREHOUSEM AN-Packer required. Permanent posi- of large contracts in all stages, including final accounts. * * tion. Past experienced preferred. Applications only Responsible position with prospects required by man with from Class A ex-Servicemen. Write, stating wages, etc.. initiative. London area preferred.—Box 7973. c/o The to—Box 3437. c/o The Electrical Review. Electrical Review. N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w 6 3
A D V ER T ISIN G Manager, in twelfth successful year LECTRICAL Engineer (3D. 10 years' pre-war ex < .C(,)mpiViy,' invites offers from manu- E perience in electrical installation contracting, hutuicrs of/Uuiustiial and domestic electrical products.— requires responsible executive position. Experience in Box 8023. c/o The Electrical Review. eludes planning, estimating, sales and business manage A L L Chief Engineers. A supply undertaking has the ment- followed by 5à years’ war service in Technical oppomnnty to secure service of Development Engi Branch R .A .F. (over 3 years S/Ldr.). Releast* B .A.O.R. neer, A .I.E .E ., M .E.M.E.. qualified take charge develop .January, 1946.—Box 8018, c/o The Electrical Review. meat of area any size, load building, sales, installations. X -R .A .F. (36). just released, seeks position, with manu Prefer Scotland, but consider any district. Commencing E facturer preferred, but not essential; 12 £ yrs.’ ex salary £550. Apply first instance—Box 7998, c/o The perience as Representative Salesman in Lancs, and Cheshire Electrical Review. in electrical and radio. Sound and extensive pre-war con .M.I.E.E. (40). Power Station O.H. and U.G. nection amongst the wholesalers and corporations in this A district. Practical, technical and commercial exp. area.—Box 7986, c/o The Electrical Review. supply work. Overseas preferred.—Box 7974. c/o The X-Warrant Officer* Radar mechanic, 36. married, Electrical Review. E practical, capable organizer, good knowledge man- N Electrical Contractor’s Supervising Engineer. production methods, seeks opportunity to apply a keen A• Electrical. Mechanical, etc. Long experience, con interest in the design and production of electric house nections. London centre radius.—Box 8019, c/o The hold equipment. Prospects of greater importance than Electrical Review. initial salary.—Box 8021, c/o The Electrical Review. U YER offers services." Experienced 6 and 7-figure LUORESCENT Tubes. Engineer (32), with detailed B purchases, electrical equipment and access. Know- F knowledge of manufacturing processes and plant edge of markets, keen bdyer. home and foreign. Free design, offers services. Only genuine authoritative posi ;oon.—Box 3426, c/o The Electrical Review. tion acceptable. Minimum salary £600.—Box 7934, c/o U YER (35). experienced with radio manufacturers, The Electrical Review. B also general office management, seeks change.—Box T^OREM AN or Charge Hand, aged 57, life-long ex- 7928. c/o The Electrical Review. A- perience of all descriptions, electrical installations. H ARTERED Electrical Engineer, age 45, ex R .A .F. —Box 8024. c/o The Electrical Review. C officer, at present on release leave, seeks permanent '1 RAD. I.E .E . (30), 14 years’ experience A.C./D.C. appointment, over 20 years’ experience works admin, and ( equipment and installation, seeks responsible posi commercial.—Box 8027, c/o The Electrical Review. tion. Free R .A .F. Jan., 1946.—B'ox 7926, c/o The Elec /COOKERY Demonstrator seeks position. E.A.W . trical Review. v«' Electrical Housecraft Diploma, Chelsea Polytechnic LLUMINATION Engineering and Lighting Fittings. First-Class Domestic Science, within 40 miles Bedford. I Draughtsman designer (32), wishes to enter electrical Write—Box 7884, A.K. Advg., 212a, Shaftesbury Avenue, side of above industry, preferably street lighting, after 8 W.C.2. 3321 years’ break. Minimum salary £500 London, £450 Pro DUCATED Woman, well known electric supply under vinces. Release obtainable, but M.O.L. approval of E takings, electrical trade, etc., 50 miles radius Bristol, position essential.—Box 7933, c/o The Electrical Review. desires to represent firm of repute on commission and ex AN, aged 42, General Engineering Apprenticeship. penses basis; has car.—Box 7997, c/o The Electrical Review. M Higher National Certificate Electrical Engineering. 12 years’ experience production planning, including LECTRICAL and Refrigeration Engineer, A.M.I.E.E. material specification, progress, stock control, production E (38), seeks responsible appointment with manufac control, etc.. and general office routine, seeks responsible turers. or distributors, where general electrical and re administrative position with prospects, and commen frigeration experience, coupled with six years’ army experi surate salary. Reply to—Box 8014, c/o The Electrical ence on technical staff and administrative control of Review. R.E.M.E. workshops, are suitable qualifications. London 1\/TAN U FAC TU RERS’ Traveller, over 20 years with area preferred. References.—Box 7954, c/o The Elec A'A. present employers, seeks change. Unrivalled con trical Review. nection with wholesalers. Corporations, and large users in LECTRICAL Engineer/Administrator (41), A.I.E.E.. London and South. Own car. Or would consider E sales and works experience domestic apparatus and agency arrangements. Reply in confidence.—Box 7983, switchgear, desiring change, seeks progressive post, ^sales c/o The Electrical Review. management preferred; residence Manchester.—Box 7995, RACTICAL Engineer (35), free now, 19 years’ experi c/o The Electrical Review. P ence electrical heating and cooking apparatus, sheet TT'LECTRICAL Engineer, A .I.E .E ., 23 years’ experience, metal work, engineering workshop practice, 2 years charge- including 13 years executive position, industrial hand (200 personnel), 5 years foreman, studying for electrical installations, light electrical equipment; con A.M.I.Mech.E., A.M .I.E.E., excellent refs., requires sit. struction. installation and maintenance self-contained immediately.—42, Curzon Avenue, Enfield. 7988 lighting plants and accumulators. Free now.—Box 8017. ELEA SED from Admiralty, Production Engineer c/o The Electrical Review. R (nearly 6 years), Electrical and Mechanical, seeks XT'LECTRICAL Engineer. B.Sc.. 40. fully experienced permanent post, previously electrical switchgear develop AL h .T., L.T. and D.C. distribution, power station ment designer, practical and theoretical training, capable work, industrial and domestic power, lighting installa organiser, flexible, energetic. Salary £700. Write— tions. Free M.O.L. control.—17 Frederica Rd.. Winton, B M /RJM B, London. W .C.l. 7943 Bournemouth. 8007 ALES Engineer. A .I.E .E . (40). successful pre-war record LECTRICAL Engineer. ex-B.T.H . apprentice, with S at home and abroad with C.M.A. and others; contracts, E glass bulb rectifier and Admiralty experience, age 32, cables, transmission lines and accessories. Now returned requires progressive post, minimum £600.—Box 7996, c/o from commissioned service with the Forces. Will consider The Electrical Review. senior position of trust and responsibility, such as Sales TALECTRICAL Engineer, free at end year, desires ad- Manager or Foreign Representative, that justifies £1,500 ministrative post. Age 43. 20 years’ experience, p.a. and prospects, as the reward of initiative and enter installation and alteration of E.H .T. systems and hydro prise in post-war development.—Box 7920, c/o The Elec- electric stations. Building and workshop installations. Some experience heating and ventilating.—Box 8010, c/o O Sales Managers planning expansion: Advertiser, The Electrical Review. T successful record, wishes renew sales career as London X?LECTRICAL Engineer, pre-war Contracting, Subs., Representative. Selling experience covers wholesale and AL Management, or Manufacturers’ Service Agent, retail, industrial users and large stores.—Box 7994, c/o capable in all maintenance, installation & auto electrical The Electrical Review. work, car. res. Herts (46).—Box 8026. c/o The Electrical Review. , . T?LECTRICAL Engineer, 22 years business experience, FO R SA LE just completed contract for U.S. Government on the Continent, seeks re-engagement as Representative or Traders buying and selling hereunder must observe the Negotiator willing to travel, own car available, residing Restriction of Resale Order, S. R. & O. 1942 No. 958. T nnrlnn nrpa Free to commence at once. Minimum salary i f & Co- W 5; D R Y CELLS TPNGDNEER.T TO riN EE R 11^over over twetwenty , years’ er manufacturing and p]astjcs and ¡nsu]ate(J tech- LD-established battery firm in production of -La meal experience Pape ^ rial appointment with pro. O all types of Dry Cells. D .R.3 speciality. electric cables, reqmres im = p/Q Thg Electrioal Eeview Delivery ex works. Quotations by request. gressivp company. . , raanufa.cture of F.H .P. electric Contracts invited. X P E R T on desig in t^e Eastern Counties. A-J motors. \ m I.E.E. Experienced in THE ABIES BATTERY CO., Qualifications B.&t-.. Box 8011. c/o The Electri- 117, ANERLEY ROAD. ANERLEY, S.E.20. scientific control of labour. 63 cal Review. 6 4 E lf.c i r i c a l R e v ie w November Ti, 1 9 4 5
GEORGE COHEN, SONS & CO. LTD. MOTOR GENERATOR SETS for I G.E.C., input 460 volts D.C.. output 12 kW. 400 volts. GUARANTEED ELECTRICAL 3-phase. 50 cycles (four wires). 1 Crompton Parkinson, input 400 volts. 3-phase. 50 cycles, PLANT. output 9.6 kW. 80 volts D.C.. with Control Gear. 1 Newton, input 220 volts D.C.. output 90 volts. 190 amperes D.C. MOTORS. GEXERATORS. 1 L .S .E .. input 400 volts. 3-phase. 50 cycles, output 4.8 kW. 80 volts. 60 amperes D.C.. with Control Gear. SWITCHGEAR. 1 Mawdsley. input 460 volts D.C.. output 338 volts. 1 phase, 50 cycle, 36 amperes, with Control Gear. etc.
O L D F IE L D E N G IN E E R IN G CO. LT D .. WOOD LA N E, LONDON. W .12. 96. EA ST O RD SALL LA N E. Telephone: Shepherds Bosh 2070 SALPORD. 5. 70 and STANNTNGLEY. NEAR LEEDS. WATER TUBE BOILERS IN STOCK Telephone: Pndsey 2241. Established 1S34. Two 55.000 lbs. evaporation. 270 lbs. W.P. 27 Two 25.000 Ils. .. 250 lbs. .. Two 25.000 lbs. ,. 175 lbs. .. Three 20.000 lbs. .. 175 lbs. .. Two 16.000 lbs. .. 190 lbs. .. THE “ G.P.U.” PROCESS IS AN One 12.000 lbs. .. 200 lbs. .. One 9/10.000 lbs. .. 200 lbs. .. OUTSTANDING ENGINEERING FEATURE! We install complete, including brickwork. Economisers. Pumps, Piping Valves. Generating Sets and Motors in ECAUSE existing material (often lying surplus stock. Please send us^ your enquiries: we can give B in your works) can be used to produce any immediate delivery. unusual Electrical Equipment urgently required, BURFORD, TAYLOR & CO. LTD., thus overcoming all difficulties of long delivery, licences, etc.. while still guaranteeing the result Boder Specialists. Middlesbrough. expected, technically as well as economically. Telephone: Middlesbrough 2622. ______32
Before buying new. consult our Engineers who ELECTRIC MOTORS FOR SALE have specialised for many years in budding the well-known A large quantity of the following Motors for immediate disposal. “ G-POWER-UNITS ’’ ł h.p. 3-phase 400 volts 1.460 r.pjn. Electroplant Co.. Eng. Works. Wanbley. Mdx. 3 .. 400 .. 1.460 .. 3 .. 400 .. 950 .. Please ask for Production Range Leaflet. 1 3 .. 400 .. 1.460 .. 3449 1* 3 .. 400 .. 1.460 .. 3 .. 400 .. 1.460 ..
REBUILT MOTORS AND GENERATORS Also a quantity of D.C. Starters in stock. HURST ELECTRICAL INDUSTRIES LIMITED. T ONG deliveries can often be avoided by purchasing Havelock Works. 75a. Well Street. London E.9. rebuilt secondhand plant. We can redesign or replace Telephone: AMHerst 4166. 3306 surplus plant of any size.
SEND US YOUR ENQUIRIES. LOW VOLTAGE MOTOR-GEN ER ATOR SETS OVER 1.000 RATINGS ACTUALLY IN STOCK HERE. r*N E SET— INPUT 400 volts. 3-phase. 50 cycles: ^ OL 1PLT 1.000 amps.. 12 volts. 1.450 r.pxn.: DYNAMO & MOTOR REPAIRS LTD., with exciter: on combination base with switchgear. Wembley Park, Middlesex. ONE SET—INPUT 400 volts. 3-phase. 50 cycles: Telephone: Wembley 3121 (4 line). OUTPUT 950 amps.. 0/35 volts. 960 r.p.m .: with exciter: on combination base with switchgear. Also at Phoenix Works, Belgrave Terrace, Soho Road, ONE SE T —INPU T 400 volts. 3-phase. 50 cycles; Handsworth, Birmingham. OUTPUT 750 amps.. 0/20 volts. 710 r.p.m.; with exciter: on combination base with switchgear. Telephone: Northern 0898. ONE S E T —INPU T 400 volts. 3-phase. 50 cycles; 26 OUTPUT 300 amps.. 0/60 volts. 580 r.pjn.: with exciter: on combination base with switchgear. METROPOLITAN BOROUGH OF WOOLWICH NEWMAN INDUSTRIES LIMITED, YATE. BRISTOL Electricity Department 3158
Disposal of Two 500-kVA Indoor Transformers COPPER WIRE FOR SALE f p H E above Conned has for disposal two 500-kVA Indoor Type Transformers. These can be viewed by appoint 28 s.w.g.. single silk covered, on reels approx. 31b. at Ss. lb. ment and a schedule obtained at the Woolwich Generating 30s.w.g., single silk covered, on reels approx. 31b. at Ss. lb. Station. Bellwater Gate. Woolwich. 32s.w.g.. single silk covered, on reels approx. 31b. at 6s. lb. Tenders should be submitted to me in a plain envelope, endorsed “ Tender for Transformers." and delivered not Also Strip Copper later than 12 noon on Friday. 7th December. 1945. Size .1 x .085 D.C.C., on 1-cwt. drums at Is. 3d. per lb. The Conned do not bind themselves to accept the highest Size .1 x .15 D.C.C.. on 1-cwt. drums at Is . 3d. per lb. or any tender. Town Hall. DAVID JENKINS. HURST ELECTRICAL INDUSTRIES LIMITED. Woolwich. S.E .18. Town Clerk. Havelock Works. 75a. Wed Street. London. E .9 25th October. 1945. 3361 Telephone: AMHerst 4166. 3307 2 5 . 1 945 'fiber E l e c t r ic a l R e m e w 65
CINEMA EQUIPMENT FOR DISPOSAL A L L Lanterns, finished in various attractive colours, H also oxidized.—Central London Engineering (Fabri r| n \r ii G-E -C. Motor Generators. -ISO v. D.C.. 300 a.. cations) Ltd.. 120. Old Street. E .C .l. Telephone. Gerken- 100 v.. complete with Starr- - m l
T7TBR0-ARC ” Electric Pens for engraving any “ metal, 4-6 v. A.C. or D.C. 10s. each, less trade ARTICLES WANTED discount, delivered. J . Holborow. 48. Vew Tree Lane, Harrogate. 8006 -Ray Apparatus. Watson single-phase unit. Apply— REQUIRED X Cadbury Bros. Ltd.. Bournville (Dept. ENX). 3484 O Alternators with exciters and voltage regulators, out " put 34 kVA, 460/3/50 and 20 kVA, 230/1/50 at 1.500 r.p.m. As new.—Fyfe, Wilson & Co. Ltd., Bishop’s Stortford. 3475 equired, autom atic coil winding 0 ring main B.T.H. Oil Circuit Breakers, 6,600 volt. R MACHINES FOR ELECTRICAL COIL " 3-phase, 50 cycle, type J.B .7 2 1, class Q.A. 51. form WINDING.—Box 38. c/o The Electrical Review. C .J. 4, 300 amp. Apply to— Salvage Dept., D. Napier & Son Ltd.. London. W.3. 3470 7?» and 30-h.p. National Diesels; 35-kW Browett Steam 38 • Set. 220 vo. D .C .; Weir Feed Pump, 8£" x 6" x 13"; Lancashire Boiler. 24' x 7'. 120 lbs. w.p.; Fuel Oil WANTED URGENTLY Tank, 24' x 9'; 35-kW Tangye Diesel and Dynamo. 220 vo.; 250-kW Steam Generating Set, 220 vo. D.C.—Harry H. Gardam & Co. Ltd. Staines 98. 60 EDUNDANT stocks of Electric Cable Rubber or 1 O f Y h P ’ “ Laurence Scott” Slipring Motor, 400/3/50. R P.V.C. Any quantity purchased for cash. Also J - v / v r screen protected, ball bearing, 930 r.p.m. scrap P.V.C. in form of Cable or strippings. Acetate and Complete with “ Allen West ” oil immersed Starter. other thermoplastic materials. Date 1941. — Stewart Thomson & Sons, Fort Road, Seaforth. Liverpool. 2 1. 55 W A N D BEE & CO. LT D .. 0 £ 7 / V k V A Alternator,-400 volts, 3-phase. 50 cycles. 750 Church Walk, Albion Rd., Stoke Newington. London N.16 revs., with direct-coupled exciter; also two 250- 3346 kW Rotary Converters, with transformers and switchgear. input 6,600 volts, 3-phase, 50 cycles, output 420/210 volts D.C.—Midland Counties Electrical Engineering Co. Ltd.. WANTED Grice Street, Spon Lane. West Bromwich. 36 Electric Motors. Dynamos, Transformers. Con- All kinds and quantities of verters, etc., etc., at low prices.—S. C. Bilsby. A.R.P. AND C.D. A.M .I.C.E.. A .M .I.E.E., Crosswells Road. Langley, near Birmingham. Phone. Broadwell 1359. 21 STORES AND EQUIPMENT AUCTION NOTICES Please send schedules and full details to M.M.C., 206. Bishopsgate, London. E.C.2. At CONDUIT COURT. LONG ACRE. LONDON, W.C.2. 3418 on W EDNESDAY. DECEM BER, 5th, at 1 1 a.m. MACHINE TOOLS: S.S. and S.C. LATHES, by LANG. A .C. Slip-Ring Motors. Two 20 h.p., 950 r.p.m., 400/ LODGE, SH IP LE Y , I.X .L ., etc.; 7 motorised pillar and 3/50, protected type, with starters; must be modern bench drills; 2 heavy pillar ditto; milling machines; machines and B.B\—J . G. Sneath Ltd.. 5. Wallwood St.. motorised grinders; hacksaws; fly presses; vices; equip London. E .14. 3412 ment and small tools; 20 A.C. motors. £ to 3 h .p .; 4 con A CCUMULATOR Plates (old) and lead Peroxide; as vertors, etc. actual smelters we pay top price. Also old storage batteries, transformers and whole installations purchased. ENGINEERS’ STORES: Steam valves and fittings, —Elton, Levy & Co. Ltd.. 18, St. Thomas Street. S.E.l. 1,000 lb. silver steel. 20 cwt. rubberoid and jointing; Hop 2825-6. 39 carborundum wheels and blocks, paints; shellac; bolts, etc. M PERE Balance (Kelvin), new or secondhand, any ELECTRICAL AND WIRELESS: 10 cwt. S.C. wire, A range, any condition.—Box 3481, c/o The Electrical 29, 34 and 42 s.w .g.; 20,000 yds. rubber and V .I.R . cables: Review. conduit and fittings; I.C. switchgear; A.C. frig.; switches A PPRO X IM A TELY 80 kVA single- or three-phase and lampholders, etc.; lamps; many items electrical Condensers.—Britannia Manufacturing Co., Ltd.. appliances; 12 mains radios; 10,000 late type valves; part 22/26. Britannia Walk, London. N.I. 3464 fitted chassis, etc. T V C ./D .C . Welding Sets. Input 440 volts D.C.. output 250/300 amps. Full particulars and prices to—Box On view day prior and day of Sale. 7930, c/o The Electrical Review. TAYNAMO Balancing Machine for fractional h.p. electric Cats, of Auctioneers: motor armatures.—Fyfe, Wilson & Co. Ltd.. WEST CENTRAL MERCHANDISE MART. Bishop’s Stortford. 3473 T ^LE C T R IC A L Accessories required for export, such as 1. CONDUIT BUILDINGS. FLORAL STREET. -*—11 Irons, Fans, Kettles, etc. Write full details to—Box LONDON. W.C.2. 3425, c/o The Electrical Review. Phones, TEMple Bar 0233/4. X ^ N G IN EE R IN G Technical Books (new or secondhand) ’Grams, Loudsigs, Rand. London. wanted in any quantity. Attractive cash offers. Call ______3378 —Third floor, 356, Oxford Street. W .l, or “ Stoneleigh.” St. George’s Avenue. Weybridge. 62 1\ T E R C U R Y (Quicksilver) wanted. Write for packing FOR SALE BY AUCTION -‘A-L instructions. Gold. Silver and Platinum also pur on chased.—Collingridge & Co. Ltd.. Riverside Works. River 28th NOVEMBER. 1945, side Road. Watford (Tel. 5963). 20 at ETRO L and crude oil Engines vertical, all sizes, EARLS COURT EXHIBITION. P also direct coupled Generating Sets.— Fyfe. Wilson & Co. Ltd.. Bishop’s Stortford. 3472 Removed from the late German Embassy. EDUNDANT stocks of l, 2. 3, 5 & 7-mm. Wire. F le x % ELECTRICAL EQUIPMENT R and Cables of all descriptions. Please send samples and ' prices to—Alec Davis, 8. Percy St.. London, W.l. 3198 including Chandeliers, Wall BTackets. Standard and Desk ATULCANISIN G Pan, horizontal type, steam jacketted Lamps. Electric Stoves. Vacuum Cleaners. Refrigerators, V (double walled) 4 feet clear inside dia. and 15 feet and a Siemens-Schuckert Electric Motor with “ Alexander- clear cylindrical length, suitable for 60 lbs. working pres welk ” aluminium fittings for same. sure. inside rails and quick-closing boltless lid. Vulcanis ing Pan. vertical type, steam jacketted (double walled) Auctioneers: 3' 6" clear inside dia. 3 feet clear cylindrical depth, Messrs. KNIGHT, FRANK & RUTLEY, suitable for 60 lbs. working pressure, quick-closing bolt- 20. Hanover Square, W.l. 3427 less lid.—Box 7976. c/o The Electrical Review. \\T ANTED. Rotary Converters, any size.—Universal. 221. City Road. London, E.C.l 22 PREMISES WANTED 'V l^’ANTED 100/140-h.p. 3-phase, slipring, ball-bearing. M ALL London office, with or without adjacent room, ▼▼ 400-volts. 50-cycle, slow speed Motor with control S for electrical test-assembly, required by young engineer. gear.—Britannia Manufacturing Co.. Ltd.. 22/26. —Box 8020, c/o The Electrical Review. Britannia Walk. London. N.I. 3469 N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w 67
li™ £iSam,xEneme Alternator Sets of 100 USINESS man requires agencies for London and a hip hniL.rc n i^ ' 3-phase, 50 cycles, and suit- B Southern England of Electrical Equipment on com s i ? ann gei' era‘ lnf. Panels. Also one 150-kW Diesel mission basi^only. Write—Box No. 208, c/o Crossley & w son r U ™ v o isl P „ se’ 50 cycles, speed not exceed- Co. Ltd.. 5, Racquet Court, Fleet Street. E.C.4. 3350 !?*• r.p.m. State full particulars with prices, con LECTRICAL Engineer, A.M .I.E.E., requires agency. dition and age of the plants offered.—Box 3299. c/o The E London and South Coast, for Cables and small Switch Electrical Review. gear, own car.—Box 7964, c/o The Electrical Review. w*k;P‘\ to 1-h.p., 1,500-r.p.m. standard X ^X P O R T ER S require Agency for Household Lamps of r i i ? TQuantity required. Full details to all types. Large orders waiting. Continuous —Industrial Electric Ltd., Offord Street Works, London. business assured.—Box 3329, c/o The Electrical Review. N-L , 3471 "E ST A B L ISH E D Manufacturers’ Agent with wide con- 7 ^ * 0 ^ i Alternator. 3-phase, 50 cycles, preferably aections throughout Northern Ireland wishes to hear * , wound for 400 volts, speed 750 r.p.m., for direct of agency for cable on commission or buying basis.—Box coupling.—Box 3396, c/o The Electrical Review. 8002. c/o The Electrical Review. XPORTING Agents have open connections with most WORK WANTED AND OFFERED E of the leading merchants and importing houses in the M.E. countries. If interested in this market and able to obtain export licence, state full particulars to—Box P3398. CAPACITY AVAILABLE FOR THE Samson Clarks. 57/61. Mortimer Street. W .l. 3433 FOLLOWING WORK X ANCASHIRE area. Agent with 30 years’ experience design and manufacture desires agencies for Switch Capstan (up to li") . gear, Machines. Accessories, etc. Commission and small Centre Lathe (up to 6"). contribution towards expenses.—Box 8013, c/o The Elec Milling (High and Low Speed). trical Review. Drilling and Tapping, etc. "V/TANUFACTURERS’ Agents, covering the whole of Sheet Metal and Steel Fabrication. Great Britain and Colonies, are desirous of contact Welding (Electric. Arc, Spot and Gas). ing manufacturers with a view to sole selling rights (either Engraving. commission or buying), post-war arrangements considered. Light Assembly Work (Electrical and Mechanical). —Box 23, c/o The Electrical Review. Plating. IX/TANUFACTURERS’ Agents operating in London and BLUNT & WRAY LTD., South of England open for additional Agencies for 70. SA LU SBU R Y ROAD. N.W.6. Switchgear. Accessories, Appliances and any products (MAIda Vale 8151). 3463 suitable for distribution through wholesalers.—Box 76. c/o The Electrical Review. LL types of Transformers up to 15 kVA, including neon LD-established London and Manchester firm of Steam O and Electrical Equipment manufacturers is reviewing A and fluorescent lighting chokes.—"Woden Transformer agency arrangemnts in England and Wales. Enquiries Co. (Phone. Bilston 41959). Moxley Rd., Bilston. Staffs. 11 from reputable firms with good connections, in particular S designers and manufacturers of Coils. Chokes, Trans with local electricity authorities, are welcomed. Reply—• A formers. Output Transformers. Wave Wound Coils. Box 3446, c/o The Electrical Review. Relay Coils. Fluorescent Lighting Chokes, etc., of all LUMBING, Sanitary Electrical Hardware and Iron types, we are able to offer you competitive prices and good P mongery, Dublin, Eire. Estd. 35 years. Central deliveries. Send your enquiries to—Green Electrical In offices, well connected, are open to act as agents for above dustries Ltd.. 44/45, Tamworth Road, West Croydon. lines, also miscellaneous lines allied to above.—Box 2965. Telephone, Croydon 7417/8. 7956 Eason’s Advertising Service. Dublin. 3447 ALCULATIONS and computations of all kinds, scienti O OUTH Africa. Agent, with own offioes in Salisbury and C fic. elec. and mech. eng. statistics, accountancy, re ^ Cape Town, desires to contact British manufacturers search, design, etc.. undertaken by expert team of engineer view to representation.—Berns Agencies, P.O. Box 575. 2. scientists.—Box 7990, c/o The Electrical Review. Bein Bro. Building. First St., Salisbury, S. Rhodesia. 3395 OIL Winding! ! ! H .F., Induction, Chokes and Relays. PEC IA L Announcement. Messrs. Leons, of 153-155, C Capacity available up to 50,000 per week. — E. W. S High St., Epsom. Surrey, the actual manufacturers Engineering Co. Ltd., Nether St.. N .3. Finchley 5974. 3443 of Leons Decorative Electric Lighting Fittings, wish to LECTRICAL measuring instruments skilfully repaired announce to the numerous enquirers that an excellent E and recalibrated.—Electrical Instrument Repair range of Ultra-Modern Floor Standards and other Fittings, Service, 329. Kilburn Lane, London. W.9- 8016 in the most exquisite designs and finishes, with immediate ly/TACHINING Work, for Centre Lathes up to 6i in. stock deliveries for most lines, can now be seen in London, centres and medium-sized milling (good grade work at one of their branch factories. Immediate appointments preferred).—The London Electric Firm, Croydon. Up can be made, by phoning Epsom 2400, with wholesalers lands 4871. 56 and fittings factors. 67 MALL Armatures, etc., winding or rewinding, in quan S tity. High-class work, prompt delivery.—Max Electric Co. Ltd. (formerly Southern Ignition Co. Ltd.), 190, Thorn BUSINESSES FOR SALE AND WANTED ton Road, Croydon. 59 specialise in reconditioning Fractional and SmaJll TO ELECTRICAL WHOLESALERS H.P. Motors, Vacuum Cleaners, W aging Machines, electrical tools, etc.—Crown Appliances Ltd., 90, Wellesley Road, Croydon. Telephone, Croydon 6515. 7941 D V ER T ISER wishes to purchase interest (preferably A controlling) in established electrical wholesalers' business. Large turnover not essential provided the AGENCIES business is of good trade standing and capable of develop GENCIES required for Rhodesia for A.C. Motors and ment. E.W’.F. member operating in London or Home A Control Gear. Power Line Equipment and Trans Counties preferred. Preliminary replies will be treated formers, Radios.—Box 3354. c/o The Electrical Review. in very strictest confidence.—Box 8022, c/o The Electrical A GENCIES required. South of England, including the Review. London area: (a) Cables; (b) Small Switchgear; (c) Transformers; or any lines suitable for distribution for wholesalers’ business.—Box 40, c/o The Electrical Review. BUSINESS OPPORTUNITIES GENCIES required for London. South of England, for "|>XEW store opening in Richmond, Surrey (large floor A the following: (1) Domestic electrical appliances; space) wish to contact manufacturers for regular line (2) Brass electrical accessories, switch plugs, etc.; (3) Con of Electrical Goods. Write—28. Hill St.. Richmond. 3373 duit. Advertisers have clientele with every wholesaler in the territory mentioned. Immediate turnover can be MISCELLANEOUS guaranteed. Either commission or buying basis^ Post A NNOUNCEMENT. The Hotpoint Electric Appliance war arrangements considered. Box 64, c/o The Elec- Co. Ltd. announce that on and after November 18th. 1945. their depot at Rutland House, Otley. Yorkshire, will T3RTOSVELS (Anglo-Belgian) firm (electrical engineering) cease to operate, and future enquiries from this area should I ) withe= tn contact makers of electrical products, in be addressed to—99. Corporation St., Manchester. 3438 particular of Time Switches. Heating Elements. Resistances "DHO TO GRAPHY. Victory ends restrictions. For a particular oi x -pipptrical Tools, Soldering Irons, Hand -1- permanent pictorial record of your war-time factory Drills Household Apparatus. Clocks. Boilers. Immersion and products, for your peace-time advertising, catalogue hVoIIw Waffle Irons, material for Overhead and general purpose photographic illustrations, phone Heaters. Toasters, w etc.. with a view to repre- Holborn 6858.—Miles & Kaye Ltd., 100. Southampton Lines m Bronze l ies J Replies to -M r. M. J . Fitz Row. London. W .C.l. Specialists in commercial and patrick. TO! Hawthorn Road. Erdington. B'ham. 23. 7959 industrial photography for over 60 years. 3246 6 8 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
PATENT NOTICES LATEST A.M.I.E.E. RESULTS X>ATENT Agents.—A. E. Hill, Chartered Patent Agent, 27. Chancery Lane. London. W.C.2. 65 T N the recent Examinations held by the Institution of T>ATENT Electric Tool Tipping Machine. For tipping Electrical Engineers 477 Candidates sat who had -1- machine and other tools with tungsten carbide, stellite. taken B .I.E .T . courses. Of these 457 were successful in high-speed steel, or flash welding H.S.S. to low carbon passing the examinations. We believe this record of 457 steel. Advertiser has for disposal, either on royalty or will successes out of 477 entrants has never before been sell outright. British patent rights to manufacture and sell approached by any oral or correspondence tutorial patent Electric Tool Tipping Machine, already marketed. organisation, and indicates the very high efficiency of Also new Prototype Tipping Machine of 6-kVA capacity, the modern system of Technical training which we have bench model, capable of tipping tools from one square laid down. inch in cross section, down to one-eighth. Good oppor tunity foi> export trade. Interested parties should write The B.I.E.T. tutorial organisation is waiting to assist to—Box 8015, c/o The Electrical Review. you either with a short specialist course or complete training for a recognised examination. EDUCATIONAL NOTICES We have available a large full-time staff of instructors, while the efficiency of our extensive organisation is a byword among engineers. ENGINEERING CAREERS AND QUALIFICATIONS I WE GUARANTEE—“ NO PASS—NO FEE” D O T H Government and industry have announced and May we send a copy of " EN G IN EERIN G OPPOR emphasised that young men with technical know TU N IT IES " ? Containing a great deal of useful advice ledge and qualifications must receive every chance of and detailed information on over 200 Home-Study Courses rising to the highest posts within their capacity in post and examinations, this handbook is of very real value to war engineering and allied industry. Write to-day for the ambitious engineer. “ The Engineer's Guide to Success ” —200 courses—free— Our highly informative handbook will be sent F R E E which gives particulars of the first-class training supplied and without obligation on request. by the T .I.G .B. for the A.M .I.E.E.. A.M.Inst.C.E.. A.M.I.Mech.E., A.F.R.Ae.S., A.M .I.P.E., B.Sc.(Eng.), C. & G.. etc., examinations in which T .I.G .B. home-study BRITISH INSTITUTE OF ENGINEERING students have gained 44 FIRST PLACES AND OVER 1.000 PA SSES. The Guide covers careers in all branches. TECHNOLOGY. Electrical. Mechanical, Radio, Aeronautical, etc. Established 1927—over 200.000 students. Shakespeare House, 17, 18 & 19, Stratford Place, THE TECHNOLOGICAL INSTITUTE OF Oxford Street, London, W .I. GREAT BRITAIN, ______33 35. TEMPLE BAR HOUSE. LONDON. E.C.4. ______77 REPAIRS THE ASSOCIATION OF SUPERVISING ELECTRICAL ENGINEERS As a result of extreme pressure of Priority work we resret we are unable to accept The Swann Diploma Examination F. H. P. motors for repair or rewinding OTICE is hereby given that the Swann Diploma until further notice ; which will be notified Examination will be held at Centres on May 29th to our customers immediately the situation and 30th. 1946. becomes easier. OUR ELECTRIC HEAT SUBJECTS : Electrical Installation. ING PAD AND BLANKET REPAIR DEPT. Electrical Maintenance. WILL STILL MAINTAIN ITS 48 HOUR Application forms and copies of Regulations and Syllabus SERVICE ON ALL MAKES. may be obtained from the General Secretary. The Associa tion of Supervising Electrical Engineers, 54. Station Road. New Barnet. Herts. The latest date for receipt of application forms is March THERMOELECTRICS LTD. 1st. 1946. II Copse Hill, Wimbledon, S.W.20 A. BRAMMER, General Secretary. 22nd November. 1945. 3409
THE Snow
toys fATHff) r/Mf in the National and Provincial Press. Planning for the time when, freed from important war contracts we shall be able to concentrate all our resources on the manufacture of TEMCO, the finest of Electric Clocks. - — & SYHCWWU s a ICTRic CLOCKS product TELEPHONE Marketed by T.M.C. HARWELL (SALES) LTD., 233 Shaftesbury Avenue. London. W.C.2 Sovember 23. 1945 E l e c t r íc a l R e m e w 69
The ability to think ahead and to appreciate the problems of others is innate at Woden, and is visibly evidenced in oar own productions as well as in those components we are privileged to build for other manufacturers. If there fore you are looking ahead and would welcome intelli gent co-operation in the production of your new or redesigned projects we would like to bear from you. -jfc We specialise in all types of transformers up to 15 kVA , including neon and fluorescent lighting chokes. TRANSFORMER UIODEN COMPANY LTD TEAMS? Of M£?5 . O U D S P E * r £ f : BADIO AND COMPCNE* 1 : BILSTON STAFFS I L S T O <19 5 9
-NGINES&Fl ECTRICs Ih )-- RELAYS SUDS PUMPS Used on British 2n d American Machine T 00la , either submersible or flanged design. UN* Types :—EE-1- 2, and 4. Capacity:— From 7 to 38 galls. perm in-at 6-ft. bead. Submersible Flanged £ ON AUTOMATIC SUMP PUMP ADMIRALTY LIST / SPECIAL ^ g ' / RELAYS T o d e a l w i t h M o t o r is i n a c c o r d flooding in base- ance w ith B.S-S. V S ' / STANDARD m e n t a , b'o i Te r 170/1939 and rated /> / RELAYS to ensure continu boas esf cable y O / . . / time delay trenches, etc. ous and reliable s e r v ic e . / RELAYS / LIMIT SWITCHES I BttaIlation : Is extrem ely sim ple. O nly necessary 4 ? / MERCURY SWITCH to connect pttm p to deliver? pipe, phi« motor to nearest socket. / CONTACTORS ^ Qp / l a b o r a t o r y a p p a r a t u s ENGINES & ELECTRICS / CONTROL EQUIPMENT TO CUSTOMERS’ REQUIREMENTS 3, ST. JAMES SQUARE ■ LOHDOH - SW1 7 0 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
Aluminium Casting Alloy Noral 226
This test bar in Noral 226 rea ch ed the figures for mechanical pro perties shown above, before fracture in test. Such figures are typical of those ob tained on test bars chill cast in Noral 226 a n d heat-treated according to Specification DTD. Exceptionally 361.
Sand-cast test bars in Noral 226 are required to give the following minima :
Specification U.T.S. (Tons/Sq. In.) Elongation on 2"
D T D 298 14.0 7 D T D 304 18.0 4 D T D 361 21.0 1 A.C. Noral 226 enables parts formerly made up by expensive methods, to be cast with considerable D.C. saving in time and money. The user of Noral 226 is assured of quality, for we carry out searching UNIVERSAL inspection, including X-ray examination, to locate any defects before bulk production com 64 F i t A C W O ” mences. This high strength casting alloy has a FRACTIONAL H.P. MOTORS wide field of application in the electrical in For Every Purpose dustry, and you are invited to write to our Technical Development Department for further information Delivery of urgent priority and advice. orders as follows :— l/IS0th— I 30th h.p. . 5-6 weeks I 20th— l/8th h.p. 6-7 weeks We can give you facts 6-250 volts about Aluminium fRACTIONAl H.P. MOTORS LTD. NORTHERN ALUMINIUM COMPANY LTD., Banbury, Oxon. RO O K ER Y W A Y , H E N D O N , N.W.9 Makers of NORAL Products COLINDALE 8022-3 N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w 71
I N ORDER TO SATISFY the increasing demand f o r our products in the Brighton a r e a , w e have opened a SUB-BRANCH OFFICE at 16, MARKET STREET, BRIGHTON
TELEPHONE : BRIGHTON 4850
where comprehensive stocks of electric wires and cables will be available
THE LONDON ELECTRIC WIRE CO. Associated with AND SMITHS LIMITED THE LIVERPOOL ELECTRIC CABLE COMPANY LIMITED Incorporating and FREDERICK SMITH & COMPANY VACTITE WIRE COMPANY LIMITED
DETERMINES PERFORMANCE
ÀRLEY
¿ 4 0 E
* A C C U R A C Y * UNIFORMITY * RELIABILITY LITHOLITE INSULATORS & * SERVICE ST. ALBANS MOULDINGS LTD * COMPETITIVE PRICES EXPRESS DELIVERIES DAILY IN LONDON AREA WATFORD The VARLEY MAGNET COMPANY BLOOMFIELD ROAD 'PHONE ; WATFORp 4494 w o o L l» I(:6,ineS)W00LWICB,S.E.I8 72 E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945 Index to Advertisers PAGE PAGE Acru Electric Tool Mfg. Co. Ltd...... 40 Dryden, Thomas, & Sons Ltd...... 92 Alton Battery Co. Ltd...... 3 Duratube & Wire Ltd ...... 28 Ashdowns Ltd ...... 85 Earle Bourne Co. Ltd ...... 92 Ashley Accessories Ltd ...... 97 Elcordia Ltd...... 49 Associated Pumps L td...... 88 Electric Construction Co. Ltd ...... 37 Association of Electrical Machinery Traders...... 74 Electric Depot Ltd ...... 95 Barber & Colman Ltd...... 46 Electric Elements Co...... ; 96 Bastian & Allen L td...... 90 Electroplant C o ...... 90 Benjamin Electric Ltd...... 8 Ellison, George, Ltd...... 18 Berry’s Electric Ltd ...... 38 Engines & Electrics Ltd...... - 69 Biddle, F. H., Ltd...... 42 English Electric Co. Ltd ...... Cover i & 15 Braithwaite & Co. Engineers Ltd...... Cover iii Erskine, Heap & Co. Ltd...... 31 Britannia Batteries Ltd ...... 83 Ferranti L td...... 11 British Central Electrical Co. Ltd...... 96 Foster Transformers & Switchgear L td...... 84 British General Mfg. Co. (1941) Ltd ...... 91 Fractional H.P. Motors Ltd...... 70 British Insulated Callender’s Cables Ltd...... 9 Fuller Electrical & Manufacturing Co. Ltd...... 36 British Klockner SwitchgearjJLtd...... 98 General Electric Co. Ltd 56 & 82 British Thomson-Houston Co. Ltd ...... Cover iv & 5 General Lighting Equipment Co. Ltd...... 88 British Trane Co. Ltd...... 73 Gent & Co. Ltd...... 49 Brook Motors Ltd ...... 19 Gordon & Gotch Ltd...... 69 Brush Electrical Engineering Co. Ltd ...... 21 Grelco Ltd...... 86 Burco L td...... 26 Griffiths Bros. & Co. London Ltd...... 75 Bushing Co. Ltd...... 88 Guest, Keen & Nettlefolds Ltd...... 85 Cable Makers’ Association...... Cover ii Hackbridge Electric Construction Co. Ltd ...... 41 Carter & James, H. W., Ltd ...... 88 Harboro’ Rubber Co. Ltd ...... 74 Chloride Electrical Storage Co. Ltd...... 91 Hart Accumulator Co. Ltd...... 34 Churchouse, C. M., Ltd...... 88 Hassett & Harper Ltd...... 92 City Electrical C o...... 74 Heatrae Ltd...... 1 Cohen, George, Sons & Co. Ltd...... 77 Heayberd, F. C., & Co. Ltd ...... 55 Contactum Ltd...... 78 Hedin L td...... 86 Cox-Walkers Ltd...... 90 Hendrey Relays L td ...... 69 Cressall Manufacturing Co. Ltd...... 48 Henley’s, W. T., Telegraph Works Co. Ltd ...... 81 Crompton Parkinson Ltd...... 10, 35 & 89 Hewittic Electric Co. Ltd ...... 46 Crypton Equipment Ltd...... 39 Hildick & Hildick...... 97 Cryselco Ltd...... 29 Honeywell-Brown Ltd...... 87 Dalyte Electrical Co. Ltd ...... 78 Hoover Ltd...... 78 Davis & Timmins Ltd...... 98 Hopkinsons Ltd...... 73 Desoutter Bros. Ltd...... •...... 13 Horstmann Gear Co. Ltd ...... 94 Dixon, R. G., & Co. Ltd...... 32 Imperial Chemical Industries Ltd...... 14 Donovan Electrical Co. Ltd...... 40 & 96 Instanta Electric Ltd ...... 80 Dowsing Co. (Electrical Manufacturer^ Ltd...... 30 Insular Electric Lamp Works Ltd ...... 72 Drayton Regulator & Instrument Co. Ltd...... 94 (Continued on page 74) INSTAL'INSULAR t ( M i d
inórem e ifo itr c n d p w t
Workers cannot be expected to give of their best with poor lighting. Whether in Factory or Office—If the lamp is not the best obtainable—output will fall. Consult the makers of Insular Lamps if you have any lighting problems—we shall be glad to advise you. There is an Insular Lamp for every industrial —and domestic—need, exhaustively tested and fully guaranteed B.S.S. INSULAR ELECTRIC LAMP WORKS LTD 40-50 N E W CLEVELAND STREET, HULL Telephone 33836-7 N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w {Supplement) 73 H O PK IN S O N S' CENTRIFUGAL PURIFIERS
For the efficient removal of impurities from Tur bine Oils, Lubricating Oils, Fuel Oils, Insulating HOPKINSONS LIMITED • HUDDERSFIELD Oils etc., etc. London Office: 34 Norfolk St., Strand, W .C.2 f No cold spots in Post-war Homes . . .
Electric heating will be recognised as an essential feature fo r future homes. Healthier, indoor comfort of this kind is provided by Electric Vectairs.
The British Trane Co. Ltd. will be pleased to discuss w ith you the application of Electric Vectairs to your needs. W rite : Vectair House, 52 Clerkenwell Close, London, E.C.I. Telephone Clerkenwell 6864 & 3826. 1A {Supplement) E lectrical Review N o v e m b e r 23, 1945 I Index to Advertisers PAGE (Continued from page 72) PAGE Sangamo Weston Ltd...... 52 Insulators Ltd...... 16 Santon Ltd...... 70 N Johnson & Phillips Ltd ...... 43 Saxonia Electrical Wire Co. Ltd ...... 96 Jones, Samuel, & Co. Ltd...... 34 Scholes, George H., & Co. Ltd ...... 44 D Jones Stroud & Co. Ltd...... 93 Scott, Hugh J., & Co. (Belfast) Ltd ...... 28 Legg (Industries) Ltd...... 78 Simmonds & Stokes Ltd...... 30 E Litholite Insulators & St. Albans Mouldings Ltd.. . . 71 Sims, F. D., Ltd...... 34 Londex L td...... 98 Sordoviso Switchgear Ltd ...... 80 London Electric Firm ...... 94 Standard Telephones & Cables Ltd...... 79 X London Electric Wire Co. & Smiths Ltd...... 71 Steatite & Porcelain Products Ltd...... 47 Mallory Metallurgical Products Ltd...... 55 Sturtevant Engineering Co. Ltd...... 7 Manganese Bronze & Brass Co. Ltd...... 6 Sun Electrical Co. Ltd...... 52 T Martindale Electric Co. Ltd...... 53 Taylor & Petters Ltd...... Maybrey, H. J., & Co. Ltd...... 80 Tempered Spring Co. Ltd ...... 87 O McClure & W hitfield...... 94 Tenaplas Ltd...... 83 M.C.L. & Repetition Ltd...... 1 Thermoelectrics Ltd...... 68 Mek-Elek Engineering Ltd...... 92 Thew, Edward H., Ltd...... 98 Metafiltration Co. Ltd ...... 93 Thornton Products Ltd...... 40 Metropolitan-Vickers Electrical Co. Ltd...... 50 Thorpe, F. W., Ltd...... 33 Micanite & Insulators Co. Ltd...... 4 T.M.C.-Harwell (Sales) Ltd...... 68 Midland Electric Mfg. Co. Ltd...... 25 Trionite Ltd...... 90 Ministry of Fuel and Power...... 20 Tufnol Ltd...... 42 Moore’s (Bournemouth) Ltd...... 93 Tullis Russell & Co. Ltd...... 24 Northern Aluminium Co. Ltd...... 70 Tyne Truck & Trolley Co. Ltd...... 97 Parmiter, Hope & Sugden Ltd...... 75 United Insulator Co. Ltd...... 86 Parsons, C. A. & Co. Ltd...... 22 Varley Magnet Co ...... 71 Perry Barr Metal Co...... 95 Vent-Axia Ltd...... 44 R Pitman, Sir Isaac, & Sons Ltd...... 48 Veritys Ltd...... 4 5 & 53 Poles Ltd...... 48 Viscose Development Co. Ltd...... 17 Premier Electric Heaters Ltd ...... 12 Walsall Conduits Ltd...... 2 T Pultra Ltd...... 51 Walter, D., & Co. Ltd...... 86 Pye Ltd...... 34 Ward & Goldstone Ltd...... 54 I Record Electrical Co. Ltd...... 94 Wardle Engineering Co. Ltd...... Cover iii Redfern Stevens Ltd...... 96 Watford Instruments...... 86 Rediffusion Ltd...... 76 Weir Electrical Instrument Co. Ltd...... 40 Reyrolle, A., & Co. Ltd...... 23 West Insulating Co. Ltd...... m Rhodes, Brydon & Youatt Ltd...... 95 Westminster Engineering Co. Ltd...... 1 Richardson Westgarth-Brown Boveri Ltd ...... 32 Wheeler, F. H., & Co. Ltd...... 97 Rockman Engineering-Co. Ltd ...... 92 Wiggin, Henry, & Co. Ltd...... 26 Ross Courtney & Co. Ltd...... 1 Woden Transformer Co. Ltd...... 69 Ruberoid Co. Ltd...... 90 Yorkshire Switchgear & Engineering Co. Ltd...... 27 Runbaken Electrical Products...... 98 Zenith Electric Co. Ltd...... 48
V ¿MOULDED RUBBER PARTS) Ha i * lirb w
{ This is one of the several problems which is receiving the active attention of the Association. If you are a firm of Electrical Machinery Traders write lor details of membership and learn what has already been achieved in the interests of tin* trade. SERVICE The Secretary: (J. T. MOKGAN), W ith Fifty Years’ ex THE ASSOCIATION OF ELECTRICAL MACHINERY TRADERS perience of compounds 11 ARGYLL STREET. LONDON, W.l. Tel. : CERr.rd 6177 and mouldings and an up-to-date plant w ill quote for your particular re quirements in Moulded Rubber parts.
p
THE HARBORO’RUBBER CO. LTD., MARKET HARBOROUGH N o v e m b er 23, 1945 E lectrical Review (Supplement)
FUSES
Guaranteed high breaking capacity. Easy and cheap rewirability. Thermal capacity and time-lag. Freedom from deterioration. Low operating temperature. Low fusing factor.
The Aeroflex range o f PARMITER, HOPE & SUGDEN LTD. fuses is supplied in capacities up to 1500 amps Longsight, Manchester 12 London : 34 Victoria Street, S.W.I
A re you trou bled
by va rn ish th ro f r o m high speed
m o t o r s ? then consult - GRIFFITHS BR0S.& CO.LONDON LTD PAINT, EN AM EL & INSULATING VARNISH SPECIALISTS MACKS ROAD, BERMONDSEY, S.E.I6
_ First in tfie.Jiefd o f B ritishInsuF ating Varnisfi M anufacturers - andstifC foremost 76 (S u p p le m e n t) E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
The plug and socket. Two of the many electrical components which depend on good insulation.
UNIFORM INSULATION- THICK or THIN
I F you are making a component, specially developed to do this parti such as a plug and socket, for cular work. With outputs ranging instance, you can do so a great deal from 250 watts to 5 kilowatts, more easily when you know that Redifon radio heaters can deal your plastic insulating material is with between 2 oz. to 3 lbs. of uniformly effective, whether the sec plastic material per minute. Saving tion is thick or thin. in production time is usually over The only way you can be certain 50%. of this, is when you know that the Redifon radio heating sets have plastic preform has been thoroughly all the necessary safety devices for heated all the way through, and has use by unskilled operators. They are cured simultaneously throughout. fully enclosed and simple to operate. The pre-heating of plastic preforms Manufacturers who wish for further can only be achieved with such particulars of the use of radio certainty by using radio heating. heating should get in touch with Redifon radio heaters have been Rediffusion engineers now. Rediffusion Ltd. DESIGNERS AND MANUFACTURERS OF RADIO COMMUNICATION AND INDUSTRIAL ELECTRONIC EQUIPMENT
SUBSIDIARY OF BROADCAST RELAY SERVICE, LIMITED CARLTON HOUSE, REGENT STREET, S.W.I Noil nher 23, 1945 Electrical Review (Supplement) 77
o i t t p o * *
T k h t W
Smile, if you will, at the worthy Buggins, but after all isn’t every castle first built in the air ? Doesn’t every new industrial undertaking, say— every extension of a Works— originate as a mere concept in some enter prising person’s imagination ? Soon the time will come for turning such concepts into concrete— and then Plant and Machinery will be needed. That’s where we come in. Whatever t o u t needs we can certainly help to fulfil them promptly from the LARGEST STOCKS of MODERN SECONDHAND PLANT AND MACHINERY in the Country, which include
Generating Sets, Motors, Stcitchgear, Transformers, Diesel Engines, Boilers, Pumps, Air Compressors, Cranes, Locomotives, Potter Presses and Sheet Metal Working Machinery, Track and Wagons, Tanks, Steel Sections, Tubes and Fittings, and virtually every kind of modem Second hand Works’ Equipment.
GEORGE COHEX. Sons & Co., Ltd WOOD L A N E . LONDON. W .1 2 & STAXNESGLEY. NEAR LEEDS one of toe Phone: Srerhercs. Established 1834 Hume; Pudsey 2241 P fl f l Grans: Omniplant, ChisL London Groms: Cobom, Leeds AnH ur B i * Shemeld ’ Glasgow - Newcastle - on- Tyne U LJ \lanche>*e" Southam pton * Bath ‘ Beliast * Swansea * etc. * etc. GROUP 78 (S u p p le m e n t) E l e c t r i c a l R e v ie w N o v e m b er 23, 1945
FRIEND or FOE? From the beginning of the W ar Hoover Lim ited made the Power Unit Rotary
Transformer of the telltale "echo" device which signalled “ friend” automatically. Small electrical
motors, rotary transformers, blowers, generators, were made by Hoover Limited for a host of purposes in
the war. They are available in peace too, for those whose plans call for them. If you are interested, get into
touch with us now. HOOVER LTD
M akers of the W orld’s Best Cleaner
HOOVER LIMITED PERIVALE GREENFORD MIDDLESEX
For all types of rotating gear use a DECO CONTACT COLLECTOR COLUMN Illustration shows a DECO MINOR BATTERY CHARGERS pattern slipring gear and copper tipped brushes, the RECTIFYING EQUIPMENT protecting us! covers having TRANSFORMERS been removed. Many other (INDUSTRIES) £ ~ t c L . designs available. WILLIAMSON ST, WOLVERHAMPTON. The Dalyte Electrical Co. Ltd., West Row, London, W.10
Make contact with CONTACTUM SWITCHES SWITCH PLUGS C eiling Sw it c h es, Bell Pushes Sockets plug T ops CONTACTUM LTD. Victoria W orks, Edgware Road CRICKLEWOOD, N.W.2 Itlei ittttoh—r r
Not ember 23, 1945 E lectrical Review (Supplement) 79 UNDERGROUND CABLES and OVERHEAD LINES IN THE EASTERN COUNTIES
Overhead line in course o f erection
\A/E have completed
many large distri bution schemes in these
areas for Government Mechanical excavation ■ of cable trench Departments, Supply and
Industrial Undertakings,
O u r Area Contract staff are always available for emergency service and local enquiries.
Completed overhead line
Stan dard Telephones and C ables Lim ited NORTH WOOLWICH, LONDON, E.I6
A re a Representative: Contract Offices: Telephone: Leeds 22476 Telephone: York 4946, Stowmarket 388 80 (Supplement) E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
RELAYS and CONTACTORS
A L U M IN IU M ALLOY-v-CAST IR O N Aluminium Die Castings cut out machining and give a better and cheaper article MAYBREY'S SPECIALISE IN : HIGH GRADE SAND AND GRAVITY DIE CASTINGS IN LIGHT ALLOYS PATTERN AND DIE MAKING X-RAY AND MECHANICAL TESTING H. J. MAYBREY & CO. LTD. ALUMINIUM ALLOY FOUNDERS A.I.D. APPROVED .AIR MINISTRY. MINISTRY OF SUPPLY AND ADMIRALTY CONTRACTS WORSLEY BRIDGE ROAD, LONDON, S.E.26 BECKENHAM 0044
I M P O RTA N T
PRODUCTS 4 BANK CAM SWITCH UNIT Sordoviso Relays and Contactors em bodying the TYPE I0 F 8 /8 7 I non-tilting type M ercury Switch (as inset) provide an ideal electrical control up to 50 amperes FU LLY capacity, with contacts totally enclosed, and TROPICALLY so protected from the atmosphere and other agencies conducive to their deterioration. FINISHED
It you are concerned with autom atic or rem ote General Inter- Services Approval control of Lighting, Heating, Power or Signal C e rt. No. 2661546
C i r c u i t s , COMPLETELY MANUFACTURED AT Write for our Publication C. 4 0 2 OUR CHELSEA FACTORY SORDOVISO SWITCHGEAR LTD. Falcon W o r k s , Loughborough INSTANTA ELECTRIC LTD. 48 OLD CHURCH ST., CHELSEA, S.W.3 Tel. No : Loughborough 3 1 3 1 TELEPHONE - FLAXMAN 3531/2 N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w (Supplement) 81
These typical Sub-station Distribution Panels built up with Henley standard tailless type units, show how readily any desired arrangem ent of fuses, instruments, etc., can be assembled on anangleiron framework, making a neat and compact assembly for installation in a Sub-station. W e shall be pleased to put forward suggestions for panels to m eet your par ticular requirements.
Figure I. Two Panels fitte d w ith standard Tailless Units having Current Transformers for operating the instruments. The Instrument Panel contains an Ammeter with Selector Switch for reading the current in each phase, a Voltmeter with Selector Switch and protective Fuses, three M axim um Demand Indicators and a Watthour Meter.
Figure 2. A Henley Unit Panel fitted with two Feeder Units with direct-reading Ammeters connected in the busbars on the phases, and nine Distributor Units. The Voltmeter, w ith Voltm eter Fuses and Selector Switch, is mounted above the Panel and woven wire screens and doors are fitted. HENLEY UNIT TYPE DISTRIBUTION PANELS
~ l ^ l —
W. T. HENLEY'S TELEGRAPH WORKS CO. LTD. 51-53 HATTON CARDEN, LONDON, E • C • I çMMS:HEtatTe^shu™,London
G 82 (Supplement) E l e c t r i c a l R e v ie w N o v e m b e r 23, J945
Born of necessity, in the urgency of war, Mobile Rectifier Substation is another electrical inclu development which will be of immense service Factories ; Chemical 1 Works; Collieries : Food j in the busy years of reconstruction. Easily Factories ; Gold Mines ; | Iron, Steel and Copper transportable by road or rail the G.E.C. mobile Works ; Locomotive and Railway Carriage and rectifier substation can provide direct current Wagon Works ; Motor CarWorks ; Ships and supply to building sites, docks, shipyards, etc. Shipyards; Textile M ills, etc., etc. Everything required for complete electrification schemes is manufactured in G.E.C. works, entirely in England.
THE GENERAL ELECTRIC CO. LTD., MAGNET HOUSE, KINGSWAY, LONDON, W.C.2 N o v e m b er 23 I94S r- ’ l ^ 4 -’ E l e c t r ic a l R e v ie w (Supplement ) 83 FIT FOR THE HARDEST tIFE
in addition to having great strength and long life, the Alklum Steel Alkaline Battery is compact, light in weight, unaffected by long periods of idleness, easy to install and inexpensive to maintain.
It is the .deal battery for switch
ALKLUM FOR SWITCH CLOSING AND TRIPPING, EMERGENCY LIGHTING, SIGNAL OPERATION, REMOTE AND STEEL-ALKALINE BATTERIES SUPERVISORY CONTROL & MANY OTHER PURPOSES Made by BRITANNIA BATTERIES LIMITED • 46 Victoria Street London. S.W I A42-45
TENAPLAS COVERED WIRES CABLES AND SLEEVINGS OFFER A WIDE RANGE TO SUIT EVERY REQUIREMENT
Write for particulars to — We also make — tenaplax CO AXIAL CABLE TENAPLAS SUITABLE FOR ANY SPECIFIC KINO OF LIMITED HIGH-FREQUENCY eq u ip m e n t 84 (Supplement) E l e c t r i c a l R e v ie w N o v e m b e r 23. 1945 N o v e m b er 23, 1945 F.LECTRICAL REVIEW (Supplement) 85
We make mouldings in any plastic Contact arc assembly blocks, terminal blocks and covers, coil formers and turrets and mounting blocks, material, thermo-setting or thermo switch couplings and spindles, brush arms, trans plastic. W e also make laminated former bobbins and covers, lead guide bars, trimmer rotors, damper caps, brush boxes and caps, brush mouldings. Our press capacity is holder bodies, caps and flanges, commutator end shield covers, terminal strips and connector bushes, from 10 to 1,500 tons, and here are junction-box escutcheons and insulators, transmitter a few of the mouldings we make for braces, covers for operator lamps, bezels, hand-wheel push-button sleeves, aerial insulators, meter bases the electrical industry: and covers.
ASHDOWNS LTD., ECCLE8TON WORKS. ST. HELEN8, LANCS TELEPHONE: ST. HELENS 3206
WELL I’LL BE BLOW ED!
Even the Greek mathematician Archimedes who, in
addition to many other things, invented the first screw over 2,000 years ago,
might have been surprised if he’d foreseen some modern developments. Take self-tapping screws
for instance. During the past quarter of a century they’ve changed all the old ideas about assembly
work, in many industries concerned with metal and plastics. They do away with tapping opera
lions, fumbling with bolts and nuts, riveting or soldering, inserts, lock washers, etc. and while
saving thousands of man hours, make much better fastenings than the old-fashioned methods.
GUEST, KEEN & NETTLEFOLDS, LTD. BIRMINGHAM The G.K.N. Advisory Bureau is willing to co-operate with manufacturers and others who (BIX Cl are interested in modern fastening devices and assembly methods. 86 (Supplement) E l e c t r i c a l il l v il w iw oveinner z j, iv-t5
% > PROCESS TIMING • PROCESS CONTROLLING • SPEED CHECKING & CALIBRATION
by W atford Instruments Equipment in every Industry
High stability filter capacitors o.ooi to 0.2, mfd. tolerance ± 0.5 % or wider. Full details on request WATFORD INSTRUMENTS UNITED INSULATOR Co. Ltd., 12-22, Laystall St. E.C.1 LOATES LANE, WATFORD, HERTS Telephone : W a tfo rd 3944 T e l: Terminus 7383 (5 lines) Gram s: Calanel, Smith, London
THE PIONEERS OF LOW LOSS CERAMICS
G r e lc o
MULTI-PLUG \ ADAPTORS m b ELEVEN TYPES KNIGHTON LANE. BUCKHURST HILL, ESSEX. Fully illustrated descrip ELECTRIC HEATING APPLIANCES Design tive folder on application GRELCO Ltd.. Grelco Works. Hopcott, Minehead,Somerset TO YOUR SERVICE
SPOTLIGHTS - FLOODLIGHTS - DIMMERS STAGE BATTENS AND FOOTLIGHTS THEATRE AND CINEMA EQUIPMENT SPECIAL DISCOUNTS TO TRADE
D. WALTER & CO. LTD. Actual Manufacturers 61-63 LANT STREET, LONDON, S.E.I TELEPHONE: HOP MSI N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w (S u p p lem en t) 87
The perfectly finished pro
duct commands admiration ;
but performance is more
important than looks. Our WITH CONTINUOUS-BALANCE PRINCIPLE Springs and Pressings are The Brown electronic potentio- serving the Electrical metric pyrometer is a self-balancing instrument for indicating, recording Industry in a thousand or controlling temperatures. different ways. If the It employs a conventional null- balance potentiometer-type measur quality of your products ing circuit, but its re-balancing system is in continuous balance, is to deserve admiration, and vibration has no effect on its simple and robust mechanism. fit them with Springs and In fact, it brings to industry an Pressings which are as good. advanced and practical application of electronics. These instruments are not immedi THE T E M P E R E D SPRING CO. LTD. ately available, but their advantages ATTERCLIFFE ROAD are well worth noting for the time, perhaps in the very near future, SHEFFIELD 4 when we Jiope to be able to offer them. Ht 8 8 (Supplement) E lectrical Review N o v e m b e r 23, 1945
SYNTHETIC RESIN LAMINATED PAPER
5 X
/ N V U $ Í ¡i I
U $ T U B E S . I S H E E T S . ‘Direct-O -lite ' C.M.CIIURCHOUSE LTD.. INSULATORS. ClARENDON WORKS .CLARENDON CROSS.EONDON.WII. THE BU SHING CO. LTD. Telephonr PARK 8617-8 T«legr*rB*i TfTfFlTINS NOTAPCH" HE BBURN-ON-TYNE
PUMPS PRODUCTS ALL TYPES—ALL SIZES •6 / e e o Reg. Design No. 837744/5 Paient No. 545772
ASSOCIATED PUMPS LIMITED 1 8 3 9 73-77 BRITANNIA ROAD, S.W.6 BATTERU
ID EAL FOR THE POCKET OR MILADY’S HANDBAG
CONTRACTS FOR HOME MARKET' & ENQUIRIES FOR EXPORT ‘INVITED Retailers please apply to their W holesalers BASKETS MANUFACTURERS :
^ •1 LTD. SINGER ST. CHAMBERS BALSALL HEATH WIREWORKS y L E V W GT. EASTERN STREET, E.0.2 Telephone : CLERKENWELL 7744-5 ■W iHn"™ Ham ' BIRMINGHAM 12 Cal Thorpe Í 733 N o v e m b er 23, 1945 Electrical Review ( S u p p lem en t) 89
[R O m P T O \&0.G3. CABLE
WILL NEVER LET YOU DOWN
Le... K U mptg r iu > «««'«•• "“ T£"- Elsc™ ,0U!!- Telegrams : Crompark, Estrand, London Telephone: TEMple Bar 5 9 1 1 90 (S u p p le m e n t) E l e c t r i c a l k e v i e w N o v e m b e r 23, 1945
^ AUXILIARY STEAM FOR TRAM i TROLLEY WORK CABLE CONSTRUCTION £ REPAIR ELECTRODE 2* USE IN CHEMICAL FACTORIES BOILERS
S e v e r s * 3 S
t h e
11 uv-*- ‘ .... P & B Insulating Tape re steata- . ncp. u s e o u tains its adhesiveness and offers permanent resist ance to mechanical damage. It is proof against at avaUah'e- PsB water and the fumes of INSULATING ssrVveat av -* * , ,u T 0 n . acids andalkalis. Supplied in rolls from w idth up. n on'ce The execution of orders is subject to tform'^ ’^ n l a s g o w . c TAPE regulations of the Ministry of Works THE BUBEROID CO. LTD. 92 Commonwealth House, New Oxford Street, W.C.I
NON-FERROUS SAND CASTINGS In all non-ferrous metals triONite TRIONITE LTD. CLIFFE VALE. STOKE-ON-TRENT TELEPHONE 2171-2
AUTOMATIC VOLTAGE, A.C. FEEDER SPEED AND OTHER
WE WILL GLADLY REDESIGN YOUR REGULATORS SURPLUS MACHINERY IF SUITABLE COX=WALKERS LTD. N o v e m b er 23, 1945 E l e c t r ic a l . R e v ie w (S u p p le m e n t) 91 Ready to serve you again with our range of Electrical Accessories
Telephone : MUSEUM 4374-4375 BRITISH GENERAL MFG. Co. (1941) Ltd 11 CHARLOTTE STREET, LONDON, W.l
In peace as in war
FOR ALL ELECTRICAL PURPOSES They provide the ‘ vital spark ’ for industry, commerce and transport The Chloride Electrical Storage Co., Ltd., Traction Department, Clifton Junction, Manchester Telephone: Blackfriars 4731 Telegrams: Chloridlc, Pendlebury London Office: Grosvenor Gardens House, Grosvenor Gardens, London, S.W.I Telephone: Victoria 2299 WE 63 45 \ore/‘ 92 (S u p p le m e n t) E l e c t r i c a l R e v ie w N o v e m b e r 23, 1945
Ź > re a b s
this Company has been engaged in the production of Pressings, Stamp ings. Spinnings, Sheet Metal Work, Capstan and Automatic W ork for the LIGHT ENGINEERING INDUSTRIES f r * b r a s s : Fully approved A I D. COPPER 1 % INSTRUMENT f T TU BES, j DRAWN S T R IP , j ÄND METER \ M SECTIONS BRASSES % # s h e & t . Ą - F O R TO E V E R Y PRECISIO N PRESSINGS > T R A D E L I M I T S ; STAMPINGS
SPINNINGS
Hassell v Harper LfJ REGENT PLACE, BIRMINGHAM, 1 On M.O.S., Admiralty and M.A.P. Lists EARLE BOURNE &C9 LIP London BIRMINCHAM 18 Manchester
RP.588D
i i e c t r i c RADIATORS DBï e a IR TOR W A R M T H ^
MEK-ELEK Engineering Ltd. DIE 17 W estern Road, Mitcham, Surrey Thos DRYDEN ¿Sons Itd.Wz
zii
Essentially for fine Instrument work. With easily interchangeable bits.
P o c lr / n a r i MODEL 3X Phone ARD 2672-3 f ENGINEERING CO. LTD., 16-18 Russell St., MANCHESTER E l e c t r ic a l R e v ie w (S u p p le m e n t) 93
A Monument to E fficie n cy
In a single passage through the Metafilter, transformer and heavily carbonized switch oils can be completely freed from all suspended impurities ; and all traces of sludge and moisture removed—a monumental tribute to the efficiency of the Metafilter. The Metafilter is economical and easy to operate; and can be used on switches and transformers while under load.
THE METAFILTRATION COMPANY LTD BELGRAVE ROAD • HOUNSLOW • MIDDLESEX Telephone: - - Hounslow 1121/2/3 Telegrams: - - Metafilter, Hounslow
DIECASTINGS A.I.D. APPROVAL P«rt I. PRESSURE AND UIDDFIEH GRAVITY insy'HTinc DIE - CASTING IN SIEEVH1GS ALUMINIUM ★ VARNISHED A UNVARNISHED ZINC&BRASS GLASS, SILK ALLOYS AND COTTON FO R TH E which comply with AIR MINISTRY ELECTRICAL TRADES and other specifications MOORE’S (Bournemouth) Ltd. - TOOL MAKERS 285 H O LD E N H U R ST RD. IONES STROUD A Co. LMl., VIDA MILLS, LONG EATON, BOURNEMOUTH NOTTS. Telephone i Lon* Eaton 404/1 Telephone: BOSCOMBE 2400-1 94 (Supplement) E l e c t r i c a l R e v ie w N o v e m b er 23, 1945
McCLURE & WHITFIELD MERSEY DYNAMO WORKS, STOCKPORT Telephone : Telegrams : 5 T O C K P O R T 3 65 3/4 " MOTORS , S T O C K P O R T " MOTORS D.C. GEN E RATO RS
|j for COMPRESSORS CRANES HOISTS PUMPS ‘M IN O R * T E S T SET FOR INSULATION TESTING MACHINE TOOLS, You could not have a more reliable or more con venient teat act than the “ Record M inor.” Made etc. with the high " Record ” precision, thia compact unit givea direct and dead accurate readinga inde LIGHTING SETS p en de n t o f vo itag e v a ria tio n . The ease ia o f fo r reinforced bakelite, aize 5£' X 3£' X 3 |', with Auxiliaries. Ships’ dear open acale 5,000 ohma to 20 megohma. Anodising and Plating. M.G. Sets. Weight only 3 lb. Height allowa full awing of handle. A free handle ia fitted to prevent the generator being turned in the reverae direction. London Office : ■ City House, 158 City Road RECORD ELECTRICAL CO. LTD. LONDON, E.C.I BROADHEATH ALTRINCHAM . CHESHIRE Telephone : Telegrams : Tel.: Altrincham 3221/22. Grama:"Infusion,” Altrincham CLErkenwell 8656. “ TRIBORD, P H O N E , LONDON“ London Office : 28, V ictoria Street, S.W .I.
POWERFUL. ROBUST, SELF- SMALL GEARED MOTOR UNITS Made Unidirec tional and Re v e r s in g . Unidirectional— Torque 36'5" lbs. at 1 r.p.m. Reversing — 60" lbs. at 1 r.p.m . Enquiries are solicited. DRAYTON REGULJIOR & INSTRUMENT CO. LTD. West Drayton Middlesex
8291 H
0 P 0 A C T I O N
t, Céecm s Sunftace-s 2 - /¡G ceiotatêfùï& dûÀy
3 j)& ce£encL& s n t a f o n y A. /h w d s fototce TIME SWITCHES THE HORSTMANN GEAR CO. LTD. Newbridge Works - BATH - Somerset N o v e m b er 23, 1945 E l e c t r ic a l R e v ie w (Supplement) 95
CableKacks & Handers jji. ii . a . s QUfiLITV GQllHCCURflCV
ALUMINIUM DIECASTINGS OR COMPLETE ASSEMBLIES
A DEPARTMENT OF PERRY BARR METAL COMPANY LTD. LIGHT ALLOY FOUNDERS AND ENGINEERS BIRMINGHAM
THE ELECTRIC DEPOT LTD., PRITCHETT ST., BIRMlNSHAI. DIECASTINGS ARE AVAILABLE AS COM PLETE PARTS ACCURATELY MACHINED TO DRAWING SIZES — OR AS GRAVITY PROCESS HIGH QUALITY DIECASTINGS.
HEAT TREATMENT, RADIOLOGY, DECORAT IVE FINISHING AND ASSEMBLY ARE ALL WITHIN THE COMPANY'S SERVICES.
A LARGE WAR-TIME OUTPUT OF COM PLETELY FINISHED CASTINGS OR ASSEMBLIES HAS SATISFIED THE MOST EXACTING A I D. REQUIREMENTS OF MANY AIRCRAFT FIRMS. SIMILAR P.B.M. QUALITY IS NOW AVAILABLE FOR POST-WAR NEEDS IN ALL BRANCHES OF THE ENGINEERING INDUSTRY
TECHNICAL INFORMATION ON SPECIFIC PROBLEMS INVOLVING ALUMINIUM DIE CASTINGS. DIFFICULT MACHINING OR M « 0 n p ASSEMBLY REQUIREMENTS WILL BE PROV IDED ON APPLICATION TO ANY OF OUR WORKS. for general water service or for accelerating flow in low pressure heating systems. PERRV BARR (RETAL COIRPAAV.
Robust unit con Engineering Works : Foundries : struction, no Middlemore Rd., Handsworth Wellhead Lane, Perry Barr coupling, no B irm ingham 21 Birm ingham 22B baseplate, small Telephone: NORthern 3366-7 Telephone: BIRchfields 4592-3 space occupied. Laboratories :
Rhodes, brvdon u Y o u att Ltd ^ Oscott Works. Shady Lane iohoom o m e t . E n g l a n d Great Barr, Birmingham 22A S t o c k p o r t Telephone . GREat Barr 1794-5 T Πo c i 96 (Supplement) E l e c t r i c a l k e v j e w
MICA-ELEMENTS
The ELECTRIC ELEMENTS Co. ______NOTTINGHAM.______y
EARTHING CUPS WITH SPECIAL BITE AND CRIP INTO TUBE OR ARMOURING «sJ
Note the tongue which ensures perfect and permanent contact. Easy to fix. Nuts cannot turn. All sizes from half to two inches IN5ULPTED IN5TRUMENT WlRE5 / THE DONOVAN ELEGTRIGAL GO. LTD. PLOIN tvENRMELLED H. C. COPPER 5TROND5 ■ BIRMINGHAM 9 Electrical Manufacturers and Stockholders
PBEVERLEY WORKS, AIMA STREET, BIRMINGHAM.6~I
[ALSO HOT STAMPINGS SPRINGS AND PRESSWOHK.
fYours faithfully REDFERN STEVENS LTD . i V ))$>)■ )
November 21, 1945 ^ T c t r . c a l Review (Supplement) 97
6 6 /68 NORTHUMBERLAND NEWCASTLE STREET UPON TYNE.I
These approved and certified Conduits HAND-TRUCKS and Fittings are consistently reliable un der the most arduous conditions of OF EVERY DESCRIPTION service. You can specify none better.
WEASEL” LIFTING TRUCKS W ITH PLATFORMS HILDICK & HILDICK WALSALL TUBE WORKS PLECK ROAD.WALSALL . WAHL.2f23. London Stores: 0 Howland Mews west. Howland S t.. W .l. Phone: museum 6225
Electrical Accessories
F. H. WHEELER & CO. LTD. Electrical Engineers and Contractors 39 Victoria St., London, S.W .I. ABBey 8080
ASHLEY ACCESSORIES ULVERSTON • LANCASHIRE 98 (Supplement) E l e c t r i c a l R e v ie w November!.^, 1945
BATTERY CHARCERS and TRICKLE CHARCERS
Trouble-free Chargers fitted with selenium all-metal rectifi cation. Thirty years’ experience behind every Runbaken pro duct. Good allowance on your ENGRAVED BRASS, CAST BRASS AND ALUMINIUM, old charger. ENAMELLED BRONZE AND CHEMICALLY ENGRAVED Booklet Q.5, giving useful informa PLATES OF ALL TYPES IN ALL LANGUAGES MANU tion and describing J 2 models, FACTURED BY THE EMPIRE'S LARGEST GENERAL on request. ENGRAVERS. SAMPLES AND QUOTATIONS ON REQUEST. EDWARD H. THEW LIMITED. RUNBAKEN MANCHESTER I 1 1, Dean Street Newcastle, - on - Tyne.
LONDEX— ■ 25 AMP. TRIPLE-POLE H IG H SP E E D ON-OFF SWITCH CONTACTOR Type “ B.B. ” with Ball Bearings. W ith or without Auxiliary Con Other Productt: tacts for High AUTOM ATIC Speed Signalling, FLUSH m ,.,M STARTERS Welding, Motor MOUNTING WÊÊÊP LIMIT SWITCHES Controls, etc. TYPK P I (HI W CONTACTORS Ask for leaflet W OVERLOADS ER/105. British Klockner Switchgear Ltd. LONDEX- LTD Chertsey, Surrey, p a o » : c h a r t , , , t i nit. MANUFACTURERS OF RELAYS AV*ORKSY 207 ANERltY ROAD-LONDON S'E-20
FOR CLASSIFIED ADVERTISEMENTS SEE PAGE 57 INDEX TO ADVERTISERS—SEE PAGES 72 AND 74 N o v e m b e r 23, 1945 E l e c t r i c a l R e v ie w iii
MICA AND MICANITE BRAITHWAITE INSULATORS Pressed Steel Precision Gauged and Stamped T a n k s Condenser Plates BRAiTHWAITE & CO. ENGINEERS, LTD. London Office (Temporary Address) : Radio Valve Spacers, etc. 45 King’s House, Haymarket, London, S.W. I TAYLOR & PETTERS LTD.3-11 WESTLAND PLACE,N. I Telephone : W HI 3993 Telegrams : Bromkirk-Phone Insulation Engineers Tel. : Clerk. 4105
HORIZONTAL OR VERTICAL MOUNTING FOR LARGE BSS CONDUIT BOX WARDLE
2
WARDLE ENGINEERING CO. LTD. OLD TRAFFORD, MANCHESTER 16 LONDON 34 VICTORIA STREET, S W. I
INSTRUMENT WIRES INSULATING MATERIALS ENAM ELLED. S ILK and COTTON covered Copper Wires, Single or Stranded, also Tinned, Paper, Asbestos and Plastic Westoflex covered. RESISTANCE W IRES. LITZ W IRES. MICA, MICANITE and B A K E LIT E In all (orms. Heat Resisting Boards. Canvaslte for Silent Gears. Oil Cloth, Silk and Paper. Slot Insulations. Insulating Varnishes. Varnished Fabric and Plastic Sleeving. Moulded and Machined Pieces, etc. WEST INSULATING COMPANY LTD. 2 Abbey Orchard Street, Westminster S.W. I IV N o v e m b e r 23. 1945
The Big Name in Industrial Lighting
LAMPS
The British Thomson-Houston Co. Ltd. Crown House, Aldwych, London, W.C.2
Printed in Great. Britain at The Chapel R iver Press, Andover, Hants, and published by E lectrical Review, Lim ited, at "Dorset House, Stam ford Strp'1* 0 1