Electrical r ev iew October 6th, m s FERTILISER PRODUCTION F rr

FOUNDED 18 7 2

Vol. CXXXVII. No. 3541 O C T O B E R 5. 1945 9d. W E E K L Y

p o u t e c h n i w The Big Name in Lighting

The British Thomson-Houston Co., Ltd. Crown House, Aldwych, London, W.C.2 E lectrical Review O ctober 5, 1945 PRESSED STEEL TANKS

BHAITHWAITE & CO

ENGINEERS LTD

Temporary London Office: Telephone: W H Iuhall 3993 KINGS HOUSE HAYMARKET LONDON S.W. 1 October 5, 1945 E l e c t r ic a l R e v ie w 1 the value ofm

Many years ago, a Mr. Dunlop conceived the idea of a pneumatic tyre to eliminate the many bumps of solid-tyred cycles. To-day — all the world “ rides on air’’ thanks to Mr. Dunlop's pioneer idea. * * *

More recently, Heatrae decided—after lengthy ex­ periment—that Monel was the ideal metal for Electric Water Heater Construc­ tion. Another example of a " Pioneer idea ” which must ultimately influence Water Heater design and vastly simplify Main­ tenance. leaders in electric water heaters

H E A T R A E L T D ., N O R W IC H P H O N E : N O R W IC H 25131 . G R A M S : H E A T R A E , N O R W IC H

W E M A K E TAG TERMINALS ELECTRIC WELDING MACHINES SPOT, SEAM AND BUTT WIRELESS WELDERS AND SIMILAR WIDE RANGE OF 35 years’ experience CONNECTIONS " SIZES IN STOCK

Automatic or Non- R0SSC0URTNEV&Co.Ltd. Automatic ASHBROOK ROAD, LONDON, N.I9 With or without Electric Control

The quickest and most economical method of Welding Oil Drums, Bars, SPRING SEAT Tyres, Wheel Rims, II kVA Spot Welder Tubes and Angles. to the tpec- iflo require« menta of our T.. WESTMINSTER ENG. Ce.L» oustomers Victoria Road, Willesden Junction, N.W.IO Maker* of all types of re­ petition pro­ Dynamos, Motors, Alternators and ducts from the bar in all Transformers Rewound and Re-constructed. metals “ Westminster ” Brush Holders. Process Arc Lamps T elephone: T elegrams : MC Land RE PETITION LTD Elgar 7372 (2 lines) “ Regency, Phone, London Pool Lon« , Langlo^ , Bifm litjham . 2 , « 1 9 4 5 E l e c t r i c a l R e v ie w O c t o b e r 5.

ELECTRIC LAMPS E.L.M.A. LAMPS MADE IN ENGLAND POPE’S ELECTRIC LAMP CO. LTO" 5.E ARNSHAW STHEiT.NEW OXFORD ST..L0ND0N.W.C.2

Telephone : TEMple Bar 6074. Telegrams : “ Duramentum, Westcent, London.” Branches holding stocks from which supplies can be obtained MANCHESTER : LEEDS : 18 Pool St., Market Street. 6 Park Square. LEICESTER : Tel. : Deansgate 5687. Tel. : Leeds 22119. 89 London Road. Tel. : Leicester '59028. , 2 ra m s: . - G ram s: Pope’s, Deansgate 5687.” “ Pope’s, Leeds 22119. ” Grams : BIRM INGHAM : 3 Grosvenor Chambers, “ Pope’s, Leicester 59028.” Broad St. Corner, Broad Street. BRISTOL: Tel.: Midland 2580. 123 V ic t o r ia S t r e e t . Grams : “ Pope’s, Midland 2580, Birmingham.” Tel. : Bristol 23239. Grams : “ Pope’s, Bristol 23239.” BELFA ST (Managers : Campbell, Gardner & Co I • 27 Fr » „ ¿ r " e l “ P c T el: Belfast 25.71. G r a m ^ ^ Liverpool Representative : Mr. B. Marks, 29 Lascelles Road, Liverpool 19 October 5, 1945 E l e c t r i c a l R e v ie w 3

Our Managing Director came to work on a horse. It took him 3J hours and a sore sit-me-down, but 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 3J- 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 : “ You 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. 152 E lectrical Review October 5, ¡9 4 5

Designed and manufactured by Specialists with over 40 years’ experience

still stands as the unequalled name for

u n e

domestic electric healing appliances . . . Kettles, Fires, Irons, Toasters, Coffee Percolators, etc.

PREMIER ELECTRIC HEATERS LTD., BIRMINGHAM, 9 O ctobers, 1945 E l e c t r ic a l R e v ie w 5

THE ELECTRICAL CIRCUIT

The BTH Company has, during the past 50 years, borne a predominant reputation for the quality and reliability of its products, and has tontributed materially to the progressive efficiency and productiveness of British Industry.

A large proportion of the electrical equipment used in industry is made in the BTH Works, and includes turbo-alternators ; generators, including heavy electrolytic generators ; switchgear ; transformers ; rectifiers ; mining and rolling mill machinery ; every kind of motor and control gear, including elec­ tronic and amplidyne 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 gas turbine.

1n H P 1 1

J D i n RUGBY THE BRITISH THOMSON-HOUSTON COMPANY LIMITED. RIJCBY, ENCLAND. A 3552 6 E l e c t r ic a l R e v ie w October 5, 1945 They'll be worth pulling in

PURCHASE T A X .

Any lamp might do for getting first sales. But Kye Lamps are the sort that bring repeat sales. Your customers will

be looking forward to a more plentiful supply of Kye Lamps.

Kye were the champion sellers before the war, because they were reliable. They will be grand business-getters again. KY £ FOR GOODWILL AND SALES October 5,1945 E l e c t r i c a l R e v ie w 7

T h e C l e a n e s t w a y t o C l e a n B o il e r F l u e s E x t r a c t s a l l D u s t a n d D ir t R e d u c e s t h e L a b o u r I n v o l v e d Many units are operating successfully in power stations, gasworks, and industrial power plants. May we send you particulars? S t u r t e v a n t engineering Co. Lt d . 2 5 .W 0 RCESTER ROAD, SUTTON,SlIRREY.

T e l e p h o n e : VIGILANT 2275 E l e c t r i c a l R e v ie w October 5, 1945

f few of the products of SANDERS WEDNESBURY

'th e examples of Sockets, Plugs, and Switch Sockets shown are indicative of the quality offered by Sanders Socket and Plug products.

Sanders exclusive " Shutterlocked' ’ feature is incorporated in the Switch Sockets —the shutter covering the live contacts being locked or unlocked according to the position of the switch dolly, which is always free to operate. This ensures that no object can be inserted in the socket tube while the switch is 'on’ though the plug may be withdrawn, but not re-inserted with the switch in that position.

W RITE FOR LIST 137 Wm. SANDERS 4 Co. (WEDNESBURY) Ltd., FALCON ELECTRICAL WORKS. WEDNESBURY. ENGLAND October 5, 1945 E l e c t r ic a l R e v ie w 9

TELECOMMUNICATION

EQUIPMEl• ' > » - 33—*

/for service in all JTpar tJiii PRIVATE TELEPHONE SYSTEMS

PUBLIC TELEPHONE EXCHANGES

CARRIER - CURRENT EQUIPMENT

TELEPHONE INSTRUMENTS OF ALL TYPES

Contractors for cornplete PROTECTIVE APPARATUS • • • supp'y *"d '"TTelephone Exchanges RELAYS tomatic and Service. Automatic . Public and Pn all types of TELEPHONE CABLES d Manual T ru n k E x d Local Service, • * * ‘“ P h o - e ^ ;; ^dtpeater Equipment CARRIER - CURRE Carrler-Currem. CABLES 3r Telephone Lines. «■ * v * LOADING COI

CELLS & BA TTERIES Dry, Fluid & Inert

SIEM EN S BROTHERS & C?, LTP W OOLWICH t LONDON; S . & .IS FSTA&LiSHSO 1958 re¡qphone : woolwich 2020 10 Electrical Review October 5, 1945 GLOVERS TRAILING CABLES (Safety First)

Incorporating Cord and Copper Braided Screen

A Glover Screened Trailer working a “ B.J.D.” Cutter in a two-foot Yorkshire Seam

Head Office : W. T. GLOVER & Co. Ltd. TRAFFORD PARK - - . MANCHESTER, 17 October 5, 1945 E l e c t r ic a l R e v ie w 11

The equipment shown is installed in a Government factory. It comprises high- grade Meters, Summators and Printometers for measuring the total energy supplied to the factory and provides a printed record of the half-hourly kW demands. The experience gained in many years of dealing with the problems of summation and maximum demand metering is at your service.

FERRANTI Ltd., HOLLINW OOD, Lancs. 1 L LONDON OFFICE: KERN HOUSE, KINGSWAY, W.C.2. 12 E l e c t r i c a l R e v ie w October 5, 1945 The ‘BELLING* Electric Streamline Cooker

B eautiful ‘BELLING

ric Stream line Cooke i 5k just lovely — ct-.

a*.. *•/8 - 1i °„ extra. £)7-6: o. 1767J9 and'19)79i

WORKS.

1,0 UVUU upptui mg

the National -newspapers and mag azi ■

You can’t beat a

BELLING & CO. LTD., BRIDGE WORKS, ENFIELD, MIDDLESEX TELEPHONE: HOWARD I2I2 October 5, 1945 E l e c t r ic a l R e v ie w 13

BOXES YOU CAN BU M AND FORGET J a m a l aäää

The design of HENLEY “ Cablegrip ” type Boxes is based on years of experience of practical jointing con­ ditions, and incorporates all those

Note ample room features which facilitate jointing opera­ for splaying of tions. Their complete reliability bears cores. out our claim for these boxes— that you can “ bury and forget.”

The range of “ Cablegrip ” type boxes include Straight Through, Service and Branch Boxes for underground instal­ lation. The “ Cablegrip” gland and armour clamp, which is a feature of the boxes, is illustrated below. HEJNLEY “CABLEGRIP” Completed Multicore Joint (above) and Box with top ha lf in position (below). STRAIGHT THROUGH SERVICE & BRANCH BOXES

The “ Cablegrip ” gland and armour clamp provides two wide bearings for the cable. A highly efficient bond to the lead sheathing is effected by means of a cast iron shuttle (A) and to the armouring by means of a cast iron armour clamp (B).

Please ask for Catalogue UCD.2, and Supplement. W. T. HENLEY’S TELEGRAPH WORKS CO. LTD.

5 I~ 5 3 HATTON CARDEN, LONDON, E*C*I c r a m s : h f n l c t e l .s m i t h , l q n d o h 14 E l e c t r ic a l R e v ie w October 5, 1945

Reduce yam btmkdotm uaka October 5, 1945 E l e c t r ic a l R e v ie w 15

The only electric motor manufacturers in the world whose products are . . . Qucvcanteed fa t eae% !

Birmingham, Bristol, Dundee, Glasgow, London, Manchester Nottingham, Peterborough, Sheffield, Wolverhampton. E l e c t r i c a l R e v ie w O ctoberS , 1945

I

m a g n e t i c D E ^ S

Igranic Magnetic Speci­ alities have been tried and proved in some of the largest industrial plants in this country. They are built to with­ stand years of arduous service.

Igranic Magnetic devices include : Magnetic Brakes Magnetic Clutches Lifting Magnets Magnetic Separators Magnetic Solenoids, etc.

Illustration above shows Igranie Lifting Magnet. Below, Igranie Type “ M ” Magnetic Brake.

Write for Detailed Leaflets à IGRANIC ELECTRIC C 9LT.°

LONDON & BEDFORD October 5, 1945 E l e c t r i c a l R e v ie w RATTLESNAKES CAN’T HEAR their own rattles

So they say. We don’t know much about snakes but we know that it is possible for engineers to get so used to the drums and cymbals of their own machinery that they no longer notice them.

Sometimes they let the noise and vibration continue— until they get trouble with breakages, or tired machine operators, or dissatisfied customers. Eventually — not always at the beginning—we may get called in.

Then we go about things in our own way, without guesswork or hunches, because we measure and analyse the vibrations with fine and accurate equipment, much of which has been developed in our own laboratories, and

can generally write and ‘dispense’ an accurate prescription at once.

Because, you must understand, we are able to^design vibration-absorbing mountings which are definitely suitable for the frequencies and amplitudes we have identified, and we have at our disposal a perfect manufacturing technique with which we can carry those designs into practical effect.

The result is that we are practically always able to cure the troubles brought to us. Whatever the character of the vibration that troubles you, our wholehearted collaboration is at your service.

Metalastik Ltd., Leicester

The Illustration shows the Metalastik F.S. type mounting, giving effective vibration and sound insulation, with additional definite location. The Metalastik riibber-to- metal weld gives an extra­ ordinarily high efficiency to these designs. October 5, 1945 18 E l e c t r i c a l R e v ie w

“That chart is one of our

biggest time-savers / ”

British Aero Components Ltd.

DRILL BUSHES • DIE SET BUSHES DIE SET PILLARS.- DOWEL PWS.

By insisting on the use oj standard sized B.A.C. Kitrided Drill Bushes leading engineers nr. j .l . , inconvenience and expense of made-to-measure orders. IT PAYSTO STAj\D ARD JSE Th «” / ( - n 7/ Bush Chart will be supplied for droning office use on application to British Aero Components Ltd Hinckley

WBmmSHI V Cogent B .io i Electrical Review, October 5, 1945

Time does not

• • [1 tell on a

Crompton Meter , 20 E l e c t r i c a l R e v ie w October 5 1945

0 *

A NEW mode in Skirts designed by Dorman & Smith Ltd., notable for its simplicity, its chic appearance and its utility. It is the DS cylindrical skirt which, when used in conjunction with the DS conduit box type socket, provides an ingenious and efficient surface mounting as illustrated. It is fitted with knockouts for all types of wiring. The DS Skirt, of course, is a member of the y C T ^ _ famous DS Fused plug and socket family. ( U i j f One size of plug only for all appliances from an electric clock to a 3-kW 230-v. load. a n d S o c A e t W rite for literature. DORMAN 6- SMITH LTD. • MANCHESTER • LONDON • GLASGOW

ER 1045 HIGH EFFICiil FIT FOR IflDLETRIflL PflD muons

RICHRRDSOflS WE5TERRTH BROWfl BOVERI LTD HARTLEPOOL 21 October 5, 1945 E l e c t r ic a l R e v ie w

Gravity roller conveyors have done a big job accelerating the handling of supplies for the war fronts. The main component was Tru-Wel electrically - welded steel tubing. We made these tubes by the mil­ lion—at high speed—enough to lay a pipe­ line from England to Moscow and back ! Our w ar experience in producing tubes at greater and greater speed can be helpful to all branches of industry switching over to post-war reconstruction. If you need con­ veyors on assembly lines or for loading and unloading ; if steel tubes can become an integral part of your product, Tru-Wel steel tubes are available in thousands or millions—shaped to your needs.

Tru-Wel electrically-welded steel tubes are mass-produced to your requirements ; identical in lightness and strength ; in concentricity and evenness of wall strength ; identical in composition so that all can be manipulated with equal ease and at full-power speed.

A MEMBER OF THE TUBE INVESTMENTS GROUP TUBE PRODUCTS LTD. OLDBURY, BIRMINGHAM T.4b 2 2 E l e c t r ic a l R e v ie w October 5, 1945

SELENIUM BATTERY CHARCERS

THE MOST RELIABLE AND EFFICIENT METHOD OF CHARGING STORAGE BATTERIES

Applications including :—

Railway Signalling Telephones Telegraphs Fire Alarms Burglar Alarms Electric Vehicles Industrial Trucks Electric Handbarrows Electric Locomotives Emergency Lighting Railway Coaches Rail Cars Electric Clocks Portable Handlamps Laboratories

PLEASE WRITE FOR ILLUSTRATED 12 p p . CATALOGUE CRYPTON EQUIPMENT LTD* „Wîé * GEORGE STREET ■ BRIDGWATFR » SflM October 5, 1945 E l e c t r ic a l R e v ie w 23

25,000 kW TURBO-ALTERNATOR Recently installed in a Power Station in Australia

Also manufacturers of TURBO-BLOWERS, TURBO-COMPRESSORS, SURFACE CONDENSING PLANT, GEARING, ELECTRICAL TRANSFORMERS, SEARCHLIGHT REFLECTORS, EEC

c. A. PARSONS & COMPANY LIMITED

NEWCASTLE - ON-TYNE ■ 6

Book the 9th November for the E.I.B.A. Victory Ball O cloberS, 1945 24 E l e c t r i c a l R e v i e w

AIR-COOLED AND .

...OIL-COOLED TYPES

( T .l) BRITISH POWER TRANSFORMER CO. LTD. Contractors to the Admiralty. War Office and Air Ministry. Telephone: Howard 1492. Telegrams : Vitrohm , Enfield QUEENSWAY, PONDERS END, MIDDX. I October 5, 1945 E l e c t r ic a l R e v ie w 25

A/as/ it is not till Time, with reckless hand has torn out half the /eaves from the Book m o fHuman Life, that man begins ML to see that the leaves which remain are few in number.

LONGFELLOW

Time and time again... profound thinkers have expressed the importance of time, in its many aspects. The wisest use of time is surely achieved when it is correctly measured. The Ferranti Clock stands supreme for precisely accurate time-keeping

F E R R A i e t U L

FE R R A N T I LTD.HoHinwood, Lancs. London: kern House, Kingsway.W.C.2 2 6 E lectrical Review October 5, 1 945 Advance Information about the a CM '

VIBRATION-PROOF FUSE

A leaflet is available which describes and illustrates the new 100 amp. 500 volt G99

DECONTROLLED SLYD LO K Fuse,typical Self-adhesive cloth, paper of a complete range and cellulose sealing and down to 5 amps, now masking tapes, are now be'ng prepared. available for all pre-war W rite now 10 and new trade users. ENQUIRIES WELCOMED, EDWARD : CO. LTD. SAMDEL JONES & CÛ.LTH. Sharston Road. Wythenshawe 16-17 NEW BRIDGE SIE.C.4, PHONE: CENtral 6 500 MANCHESTER dm 1390

S suppliers of Waxes and Di- A el e c t r i c C o m p o u n d s to Government specifications to the leaders in the Electrical Industry, we have established a reputation second to none for our ’tA fl K R I N UNI WAXES BASI As specialists in the manufacture of Waxes, our Research facilities are at the disposal of those who require a Wax for any technical purpose. Our Waxes are used for Service components. A.ID. AND C.I.E.M.E. TYPE C o r V u / t LU ---- APPROVED FOR ARCTIC AND Temple Bar 5927 TROPICAL CONDITIONS.

ASTOR BOISSELIER & LAWRENCE LTD SALES DEPT.

NORFOLK HOUSE, NORFOLK STREET STRAND - . LONDON, W.C.2 October 5, 1945 E l e c t r ic a l R e v ie w 2 7

USE

‘•Sirocco Forced and Induced Draft Fans and “Davidson" Flue Dust Collecting Plant is installed in the majority of British Power Stations a tribute to the successful design and application of equipment manufactured by engineers thoroughly conversant with all air movement problems.

WAHK

DAVIDSON & CO.,LTD.,SIROCCO ENGINEERING WORKS,BELFAST. LONDON LEED S MANCHESTER GLASGOW BIRMINGHAM NEWCASTLE CARDIFF DUBLIN

% 2 8 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5 MOTORSiELECTRIC “CONSTRUCTION CONTROL * GEAR ^ M w / d e $ n d u d M a f ffäfcienci/ /

High quality materials, sound design and craftsmanship E.C.C. 90 B.H.P. are features three-phase Motor driving which set Compressor. a standard E.C.C. of excellence Control Panel. throughout (Photograph by courtesy of the entire Climax Rock Drill & Engineering Works range of L t d .)

products ELECTRIC CONSTRUCTION / t ' P / ' / t ' LT D ’ T E L E P H O N E 1 214 55 7 LINES October 5, 1945 E l e c t r ic a l R e v ie w 29

------TIANGENIT

SOUND SIGNALS FIRE, B U R G L A R

LUMINOUS B A N K RA ID ALARMS

CALL SYSTEMS ! STRIKING, CHIMING

MINING SIGNALS & T O L L IN G MECHANISM

TELEPHONES LIQUID-LEVEL

INDICATING. RELAYS RECORDING

WATCHMANS & A L A R M CLOCKS APPARATUS

ELECTRIC IDLE MACHINE & IM P U L S E &

SYNCHRONOUS OUTPUT CLOCKS RECORDERS

SPECIAL PROCESS TIMERS APPARATUS

TRANSFORMERS

R E ST A B. 1872

“ Tangent ” Products have given unfailing service under the most exacting conditions of War, and a return to Peace­ time conditions will result in an even greater demand for their services in the many spheres in which they are used.

GENT & CO. LTD., Faraday Works, LEICESTER LONDON - NEWCASTLE-ON-TYNE - GLASGOW - BELFAST - DUBLIN E l e c t r ic a l R e v ie w October 5 , 1945

BIG BEN

The clock tower of the Houses of Parliament contains the famous “ Big Ben", an immense bell weighing I3 J tons

b i g b e n CRYSE

MADE IN ENGLAND

F I F T Y YEARS OF Q U A L I T Y & S E R V IC E

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

SELCO LIMITED, KEMPSTON WORKS, BEDFQI October 5, 1945 E l e c t r ic a l R e v ie w 31

COMPLETE A.C.MULTI-OPERATOR v ^ WELDING INSTALLATIONS REYROLLE C.A.PARSONS

TO B S 1071 ‘ 1943 h e b b u m «-im t e k u m «wAsnE-m-Tr* eweam Electrical Review October 5. 445

y iT A L V TECHNICAL PROBLEMS

We have solved them for Government departments and others. Can we assist The wo rid-wide use of t£AVO” Electrical you in your post-war production plans ? Our staff of technical experts will at all Testing Instruments is striking testimony to times be happy to five unbiased advice on their outstanding versatility, precision and any and every Die Casting problem in­ reliability, in every sphere of electrical test volving the use of ALUMINIUM -BRONZE. ALUMINIUM ALLOYS. BRASS and work they are appreciated for their depend­ WHITEMETAL able accuracy, which is often used as a THE standard by which other instruments are judged. There is an ccAVO” instrument for every essential electrical test. N o n-Fe m o u s

So/e Proprietors and M anufacturers : DIE CASTING CO LTD AUTOMATIC COIL WINDER & ELECTRICAL Nonferdica Works, North Circular Road EQUIPM EN T CO., LTD., W inder House, Douglas Cricklewood, London, N.W.2 S treet, L o n d o n , S .W .I. Phone : Victoria 3404-8 Phone t GLAdstone 6377

TEST IN SAFETY with a capacitors ) ALL TYPES OF TEST LAMP Prov. Pat. 24498 44 CAPACITORS Specially designed f o r to meec Home Office require­ m ents. No ** Live ” parts Industrial /Applications except prod points. including : 6 ft. of P .V .C . cable to each prod. Capacitor=start /Motors Additional pro­ tective sleeving at Capacitor=start and run /Motors entry points. Fluorescent Lighting Spare fuses contained case. Power Factor Correction, etc. W r ite fo r descriptive leaflet F'uli. information available on reguest and p rice to : A. H. HUNT LTD. HHIDmOIID&CHRniPIIESS LTD LONDON, S.W.is Estd. l?ci GNOME HOUSE. BLACKHORSE CANE. LONDON. E.tT October 5,1945 E l e c t r ic a l R e v ie w 33

Have you heard about the new

'KflNTARK1 H.R.C. FUSES?

To meet the demand for fuses of higher rupturing capacity than the rewirable type, M.E.M. have introduced a range of “ Kantark ” H.R.C. Fuses with features of exceptional interest. In independent tests they have been proved to exceed the requirements of B.S.S. 88/1939. A great advantage of these H.R.C. fuses is that they can be inserted in existing M .E.M . Switchfuses and Fuseboards by the use of M .E.M . Cartridge Carriers. They are also available in types for use in other than M .E.M . Fuse Carriers. M .E.M . “ Kantark ” H.R.C. Fuses are made in ratings from 5 to 200 amps, for voltages up to 440 A.C. and 500 D.C. Reliable indication is given when fuse has operated. Write to-day for List No. 270 which gives full particulars o f these reliable, rapid action fuses

MIDLAND ELECTRIC MANUFACTURING CO LTD., TYSELEY, BIRMINGHAM, li London Showrooms and Stores: 21-22 Rathbone Place. London. W.l Manchester Showrooms and Stores: 48-50 Chapel Street. Salford, 3 3 4 E l e c t r ic a l R e v ie w October 5, 1945

ELECTRIC ARC WELDING PLANT A weld is only as good as the combined skill of the operator, the efficiency of the plant, and the quality of the electrodes used. PETBOW more than adequately fulfils the latter two-thirds of the specifi­ cation with a range of Plant and Electrodes into the making of which has gone the ‘experience of many years in the design and building of Electric Arc Welding Plant and ancillary equipment. The word PETBOW is more than just a name . . . it’s your guarantee of welding efficiency.

Illustrated is the Agile Shop Welder — A.C. operated. Current range : 50-130 amps. Oil cooled. Suitable for both Electric Arc and Carbon W'elding.

H PETBOW LTD.. Incorporating: Agile Electrodes, Ltd.. Weldrics (1922) Ltd., Power Electrode Co., Ltd., Station Estate, Balmoral Road, Watford, Herts. Telephone: Watford 6033 I

Our Glass Fabrics and Tapes are manu­ factured with special heat-resisting varnishes so that no loss in flexibility or dielectric and tensile properties result when heated in transformer oil for 2 hours at 200° C.

Varnished GiassFabrics «Tapes FOR HIGH TEMPERATURE INSULATION IOCO LIMITED . Anniesland • GLASGOW October 5, 1945 E l e c t r ic a l R e v ie w 3 5 Give full protection

to your Generators, Trans­ formers, Transmission Lines, Busbars, Feeders, Motors 'and other Electrical Plant by installing Nalders “ L” Type Relays which prevent damage or breakdown due to faults of various kinds, and main­ tain equipment in efficient operation.

Type “ L ” Non- Directional Over­ current Relay with inverse and definite minimum time characteristics

TYPE “ Lc ” Overcurrent Non- directional.

TYPE “ La ” Sensitive Earth Leakage.

TYPE “ LI ” Reserve Current (or P o w e r). NALDERS RELAYS are supplied TYPE “ NL ” Directional Over­ c u rre n t. in a complete range of models. They are of outstanding quality, T Y P E “ENL” Directional Earth having high torque, low energy Leakage. consumption and a wide range Single, Double and Triple Pole of adjustable settings. The Relays patterns for horizontal or are vibration and surge proof, vertical mounting. and are fitted with reliable con­ Conforming to B.S.S. 142/1942 tacts and operation indicators. They occupy small panel space. Quotations on request. Nalders Relays are in service in leading Power Stations and in all parts of the Globe NALDER BROS. & THOMPSON LTD. :: o2",DALSTON LANE WORKS, LONDON, E.8 D 36 E l e c t r i c a l R e v i e w October 5, 1945

O'nwatdô afitl/ictotu

y y H E N the National effort has been crowned with overwhelming success in WAR production British factories must swing back to no less intensive production for the re­ habilitation of the Nation and the World. Electrical cables, essential for war, are no less essential for the arts of PEACE, and the jf S S S m L s . lessons learned in war call urgently for devel­ opment and application by the best brains in

Rend. Trade Mark the Industry. Not. 666, 686-6-7 Users of C.M.A. Cables MEMBERS OF THE C.M .A . can rest assured that they The Anchor Cable The India Rubber, are served by unsurpassed C o . L t d . Gutta-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 t d . The London Electric W i r e C o . a n d S m it h s Connollys (Blackley) L t d . L t d . The Macintosh The Craigpark Elec­ Cable Co. Ltd. tric Cable Co. Ltd. The Metropolitan Crompton Parkinson Electric Cable & S q óafye and u.ùe Ltd. (Derby Cables Construction Co. L td .) L t d . Enfield Cables Ltd. Pirelli-General Cable W orks Ltd. Edison Swan Cables (General Electric L t d . C o . L td .) W . T. Glover & Co. St. Helens Cable & L td . Rubber Co. Ltd. Greengate & Irwell Siemens Brothers & Rubber Co. Ltd. Co. Ltd. (Siemens W . T. Henley’s Electric Lamps and CMA. Telegraph W orks Supplies Ltd.) C o . L t d . Standard Telephones Johnson & Phillips & Cables Ltd. L t d Union CableCo.Ltd. CABLES

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BABCOCK & WILCOX LTD. HEAD OFFICE: BABCOCK HOUSE, FARRtNGDON STREET, LONDON, E.C.4 Mtiiftiste 'nf lifenlwPI11 tt- rrj « E l e c t r i c a l R e v i e w Managing Editor : October 5, 1945 Hugh S. Pocock, M .I.E.E. Technical Editor : Commercial Editor: C. O. Brettelle, M.I.E.E. J. H. Cosens Contents :— Page Page Editorial.—Plug and Socket Lighting “ Phoenix.” By Brig. Controversy 465 P. W. L. Broke-Smith, C.I.E., Fertiliser Production . 467 and F. A. Hulcoop, A.M .I.E.E. 483 Views on the News 470 Commerce and Industry 485 Apprentice Training. By E. I.E.E. Chairmen —III 488 Graham Ross, A.M .I.E.E. 47! Electricity Supply 489 Correspondence . 473 South African Commission . 490 Electrical Factories 474 Recent Introductions . 491 Personal and Social 475 Financial Section 492 The Adelaide Company 478 Commutator Motors—II. By K. C. Merging of Sciences 479 Howison, A.M.I.E.E. 495 Forthcoming Events 480 Contract Information . 499 Technical Education 481 Design and Maintenance. By J. Classified Advertisements . 45 H. M. Sykes 482 Index to Advertisers . 56

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Vol. CXXXVII. No. 3541. OCTOBER 5, 1945 9d. WEEKLY

Plug and Socket Controvert W ider Issues Raised by the B.S.I.

NE size of domestic socket-outlet Studies, No. 11) the Committee adopted O would be better than three. So much the normal procedure of asking the is common ground for agreement. There­ B.S.I. to prepare an appropriate specifi­ after two sharply divided views are cation. The B.S.I. decided that the up­ apparent. The first favours the substitu­ rated 5-A plug would be more suitable tion of a new all-purpose design for (and and intimated its intention to prepare a not interchangeable with) the 2-, 5- and Standard accordingly. Thus the body 10-A sizes at. present in use, rated for 3 responsible for designing the framework kW, at 230 V, and- incorporating a fuse for the execution of a declared policy is in the plug. The second group stands for unwilling to do so. a modification of the 5-A type now made The matter does not end there, as other in conformity with B.S. 546 (with which sections of the electrical industry, which it would be interchangeable dimension- had been consulted by the Committee ally), but having a fuse in the socket. have voiced strong objections to the up-rated plug and also to the implicit Acceptable Standardisation claim of the B.S.I. to exercise jurisdiction The first course was the one unanimously in this manner, which they regard as a recommended as a Code of Practice breach of its sound tradition of securing by the Electrical Installations Committee standardisation by consent. What convened by the I.E.E. at the invitation attitude was adopted by representatives of the Ministry of Works. The of these sections at the later meetings of other, which was put forward by the the Electrical Industry Committee of the British Standards Institution in our issue B.S.I. we do not know, but presumably of September 14th, has been subjected to they would feel that their chief concern criticisms in our Correspondence section, was with matters of detail within the scope that have raised questions of the broad of the specification asked for. principles under which standardisation is “ Separatist” Threats acceptable. As regards the technical aspects of the The present position is, therefore, that matter, the most important appear to be authorities most directly concerned with the possible result of inserting an “ up­ installation work do not accept the rated ” plug connected to a 3-kW load modified B.S. 546 and have hinted that into an old 5-A socket (of which hundreds they will prepare their own specification. of thousands are installed) with associated That would be a deplorable outcome of cables of like capacity, and the ignoring the deadlock. One immediate consequence of the prohibition of the use of a fuse might be that, whereas the Ministry of in a socket contained in the I.E.E. Works would adopt for its Code of Regulations. Practice the recommendations of the After reporting to the Ministry (Post-W ar Electrical Installations Committee, other 466 E l e c t r i c a l R e v ie w October 5, 1945

Government Departments, acting on their address to the I.E .E . North-Western knowledge that the B.S.I. has in the past Centre as a “ mutation ” (a change that represented the considered opinion of all produces a new species). For this concept parties concerned, would require appliances to be fully realised, however, there must to conform to B.S. 546 or any modifica­ be strengthened co-operation between tions of it. Differences of this kind could fundamental research in universities and not be regarded as creditable to the in industrial laboratories. electrical industry. In regard to the A n illustration of Dr. industry as a whole, non-compliance with High-Voltage Miller's thesis is to be British Standards is too often to be found Cables found in the history of to-day, even when these are in accord cable development. At with accepted opinion, and this is an one time mechanical and other extraneous obstacle to low manufacturing costs. factors governed design and it was not The drawing up of specifications inde­ until the need arose for transmission pendently of the British Standards voltages in excess of about 25 kV that Institution would weaken the position electrical characteristics took a leading of that body as the recognised medium place. Ionisation of voids in the dielectric for standardisation and would have reper­ under electrical stress introduced problems cussions far beyond the present issue. in physics that have been progressively T h e Federation of solved until cables for working voltages in Purchase British Industries has excess of those in use on the grid have Tax joined in the demand for become practicable. In regard to insula­ the reduction or abolition tion generally, a future possibility seems of purchase tax. In common with to be that instead of adapting ready-made electrical organisations, it sees no justifica­ general utility materials, electrical engineers tion for the maintenance of the tax on will call upon physicists to meet specific household equipment when every effort requirements based on electrical and must be made to keep the prices of new manufacturing considerations. houses down. A beginning has already I n v e n t o r i e s o f appli- been made in the reduction of the tax. Consumer anees installed on domestic The Treasury announced about a month Sampling consumers’ premises that ago that it proposed to reduce the rate were drawn up in connec­ from 33J to 16| per cent, on copper tion with frequency and voltage standardi­ domestic hollow-ware. This has now sation revealed the wide gap that generally been done. Last week a similar notice existed between an undertaking’s records was issued relating to “ household goods and the actual position. Yet such par­ of celluloid, bakelite or other plastic ticulars are necessary to provide reasonably material derived from cellulose, casein, accurate bulk figures which are essential papier mâché or synthetic resin, being for load analyses required for estimating goods of a kind used in the preparation or trends of demands. To repeat such serving of food and drink.” Having got inventories from time to time is clearly this far the authorities might next consider impracticable but close enough results can domestic electrical appliances (and even be obtained by taking relatively small gas equipment). samples of consumers on the lines recom­ O f late years the social mended in the new E.R.A. Technical Physics loss due to the time lag Report referred to on another page. The and between discoveries in information given appears to be enough Engineering electrical science and their to enable undertakings to carry out application to everyday really useful sampling surveys. uses has been materially lessened. This R e p o r t s in this issue is very largely the outcome of an increas­ Signs of relating to the allocation ingly intimate association between physi­ Activity of Government factories cists and electrical engineers, the former and licences granted to providing data based on the observations manufacturers to erect new premises show of phenomena from which technicians that gieat electrical expansion is select. This influx of science into engineer­ anticipated. A large proportion of the ing, of which it becomes a part, is referred production will be in domestic lines and to by Dr. J. L. Miller in his chairman’s export is also being kept in mind. O ctober^, 1945 E l e c t r i c a l R e v ie w 467

Fertiliser Production Electrical Methods at a Granulation Plant

HE granulation of agricultural fertilisers The new plant, which was designed and T is a comparatively new development. erected by the Sturtevant Engineering Co., The resulting product has a number of Ltd., has an output capacity of five tons an advantages over the powder forms, the most hour. The raw materials are supplied from important being its better keeping qualities. outside sources and when received are Last year the Farmers’ Manure Co., Ltd., weighed and blended, the proportions of the which has been producing fertilisers for well mixture depending on the class of fertiliser over three-quarters of a century, had its required. This mixture is deposited into a manufacturing plant at Royston, Herts, disintegrator where it is crushed. It is then entirely redesigned for the purpose of carried by means of an electrically operated producing fertilisers in granulated form. skip bucket hoist to the mixer. This mixer comprises a revolving cir­ cular container in which the mixture, in -J-ton batches, is formed into moistened granules by the addition of an appro­ priate quantity of water. After mixing, the moistened granules gravi­ tate to a smoothing-out hopper and are then transferred by means of a belt conveyor to a rotary dryer-hardener. The last- named, which is equipped with an electrically operated mechanical stoker, is a long horizontal tube, heat insulated throughout its length and revolving at around

After weighing, the mixture is fed to a blender-crusher of squirrel-cage design 468 E l e c t r i c a l R e v i e w O ctober 5, 1945

3 i RPM. It is here that the granules are formed, the process being assisted by a hot- air column which hardens and dries the product. After leaving the dryer-hardener, the granules pass to a fan-operated cooler and

The mixer (above) makes the material into moistened granules which are then transferred to the dryer-hardener and cooler (right)

thence via elevator and worm conveyor to a rotary screening unit in which the various sizes of granules are graded ready for sacking. Oversize material from the screening plant is pressed back into the cooler and re-

Gases from the hard- ener and cooler are drawn off by the cyclone fans (above) to a set of washing towers A mobile inclined con­ veyor (right) is used for loading the sacks on to lo r r ie s October 5 , 1 9 4 5 E l e c t r ic a l R e v ie w 469 screened. Gases from the hardener and breakers controlling the factory installation. cooler are drawn off by cyclone suction fans The motors and control gear were supplied to a set of washing towers. An electric by Lancashire Dynamo & Crypto, Ltd., the stitching machine closes up the sacks which main control panel by Parmiter, Hope & Sugden, Ltd., switchgear by George Ellison, Ltd., and motor starters by Allen West & Co., Ltd. The electrical installation was carried out by the Northmet Power Company under the supervision of the district superin­ tendent at Royston, Mr. F. J. Drake.

Milk Delivery Vehicles Possible Improvements ■ •ATTERY-D RIVEN electric vehicles for house-to-lpouse milk delivery formed the subject of a lecture before the Southern Section of the Co-operative Dairy Managers’ Association by Mr. H. W. Heyman, chief engineer, Battery Vehicle Department, Brush Electrical Engineering Co., Ltd. The lecturer explained that in spite of its greater first cost the electric vehicle should show a saving of at least 23s. per week for an average daily load of 90 gallons because of its longer life, which determined depreciation, as well as cheaper maintenance and operation, by com­ parison with horse-drawn and petrol vans. He had estimated that the total post-war requirement in Great Britain for average sized milk delivery vehicles would be of the order of 12,500 or 25;000 if bread, groceries, coal, The sacks are closed by means of an electric etc., were included. Those figures made it stitching machine evident that mass production was out of the question. The basic chassis could be manu­ are then placed on a mobile inclined con­ factured in batches of a few hundreds per year, veyor for loading on to lorries. and the lecturer stressed the importance of The plant is operated by seventeen electric users accepting bodies of standard design motors totalling approximately 136 HP, the whenever possible. largest motor being 45 HP (for the dis­ The lecturer’s company hoped to improve upon the battery-assisted “ hand-pram ” type integrator) and the smallest 1 HP. In a by introducing a small three-wheel truck, which plant of this nature the motors are fixed at would be very economical and also carry the different levels so that some form of central operator. It would carry 75 gallons and cover control is essential. That is provided through a daily start-stop route of 10 miles. Its pro­ a control panel' located at the mixer platform jected speed was 6-5 MPH, compared with 2-5 level about 20 ft. above the floor level. From for the “ hand-pram ” and 17 MPH for full size this panel the plant operator can control all vehicles. It was to be called the “ Pony ” the motors essential for the correct function­ truck, being designed to do substantially the same work as a horse, and was a development ing of the plant and process. Push-button based on the Brush factory truck that had been trips for shutting down the motors in an supplied in quantities to Russia. emergency are suitably located about the The employment of lightweight alloys for plant. In view of possible corrosion the body building might increase the payload by more conventional type of conduit installa­ about 15 per cent., which, in some cases of tion was not adopted, all cable work being borderline performance and taxation specifica­ Pyrotenax, fixed away from the walls tions, might be worth the extra expense. A on teak blocks, and treated externally with further increase of some 10 per cent, in payload could result from the use of aluminium in place bitumastic paint. of steel crates for milk bottles. A spectacular The electricity supply at 415 V, three- instance of weight saving was the use of phase, 50 cycles, is metered at an intake aluminium battery cases instead of composite chamber in the east wing of the factory, at wood and metal boxes, which enabled a 1-ton which point are also located the circuit- vehicle to carry an additional 30 bottles of milk. 470 Electrical Review O c to b e r s , 1945 Views on tlie Vews Reflections on Current Topics

WTNDER the rather mistaken heading decide the issue; if he wanted mass-produced “ Socialised Gas at Urmston,” the M an­ commodities, the large combine could chester Guardian reports an experiment by the probably best cater for him but if he wanted Urmston Council on a new housing estate. “ individual ” articles he would have to go The Council is to buy gas in bulk from the to the small producer. Stretford Gas Board and supply it to the * * * houses, recovering the cost by an addition to the rent; there will be no separate meters. Denials have been issued by the Reorgani­ The Council does not believe that the tenants sation Sub-Committee of the Bristol will waste gas and there is a suggestion that Electricity Committee of statements recently the method may be applied to existing made in connection with the filling of the estates on a voluntary basis. This is a posts of chief engineer and general manager scheme which has often been advocated for of the electricity undertaking. The Sub- electricity supply and electrical engineers Committee says that it is untrue that no will watch the development with interest. applications were received for the appoint­ * . * * ment of chief engineer; in fact there were over forty applicants for the two jobs. It I always find interest in discussions of the also maintains that there has been no comparative merits or failings of large and departure from the policy with regard to small industrial concerns and a good example salary scales adopted by the City Council was the broadcast in the Midland Home many years ago. Service programme last week. The advocates of the “ combine ” were Mr. J. J. Gracie (G.E.C.) and Mr. G. H. Jones, Not only human beings appreciate elec­ secretary of the Midland Miners’ Federation; tricity; even dumb animals (a ridiculous on the other side were Mr. T. A. Waterhouse, term) are grateful for the benefits which it a “ small ” employer, and Mr. G. Bostock, bestows. The “ E.D.A. Bulletin ” reports a factory manager. Mr. Gracie expressed excellent results from the casting of electrical satisfaction that the debate was on “ The Big pearls before swine. In other words the Combine and (not versus) the Small Man ” mortality rate among the litters farrowed at because he thought that both were necessary the piggeries of Mr. James Blundell of and they depended on one another. Never­ Banks, Lancashire, has been reduced to theless he contended that the largest concerns “ practically nil ” through the use of adjust­ did not always pay the biggest dividends; able Ferranti radiators. Young pigs are that they only were able to produce widely- further helped to attain robust porkhood by used commodities at the lowest prices, by ultra-violet irradiation. quantity production; that organised research was possible only on a large scale; and that they were able to look after their employees’ Cows, too, are among the electrically- welfare much better than small organisations. minded. Mention is made in a newspaper of * * * an electrically-equipped dairy farm in Perth­ shire where milk is more hygienically and On the other hand, Mr. Waterhouse more readily obtained from the herd than in thought that the more personal relationships which existed in the small factory led to a non-electrical establishment. One method of encouraging the animals is to provide better “ welfare.” There is certainly some­ thing in this but I have been in the works of music through a loud speaker during milking large companies and have found that time. I have heard this one before and have wondered what the animals like best—a intimacy existing there too. Mr. Bostock pastorale probably. considered that the customer did not always derive benefit from the cheaper production * * * of large combines and that these often 1 am somewhat puzzled by a picture 1 have sheltered inefficiency in some of their units. seen in the American Electrical World. It The small producer was compelled by illustrates 365 consecutive daily load charts competition to operate economically and he cut out and stacked up to form “ hills and was not hampered by “ red tape.” He also valleys and the caption gives the impression maintained, though here Mr. Jones demurred, ^ ls an ort§tnRl idea of “ researchers ” that the “ small ” man could adapt his plant ot the New York Power & Light Corporation. more rapidly to changing circumstances. As this is a dodge which we have used here Professor P. Sargant Florence, the chair­ tor goodness knows how many years it seems man summed up the debate very well, and incredible that the Americans have only iust suggested that the consumer would largely discovered it —REFLECTOR. ' October 5, 1945 E l e c t r ic a l R e v ie w 4 7 1 Apprentice Training' Programme for an Experienced Governing Committee

N most firms with from 100 to 1,000 hands pattern maker and moulder apprentice; and Mthe approach to the apprentice training plater apprentice. problem appears to the skilled observer to In each case, the total numbers possibly to be how to superimpose upon the existing be trained are governed by individual shop organisation a training scheme which will capacities modified by the flow of apprentices satisfy all conflicting interests. The obverse, as the years pass. Actually there may be a and so much simpler, view appears to be shortage of suitable lads. Local education entirely neglected, viz., how to extract from authorities must be closely consulted as to the existing organisation, the essential their “ output ” of scholars from day schools, elements of such a scheme. both as to quantity and type. The organisation will already include, The committee then has to decide the among its senior executives, men who have minimum qualifications for acceptance as ample practical training. A apprentices and whether the governing committee care­ By E. Graham Ross, scheme is to be solely for fully chosen from this section A.M.I.E.E. the firm’s own benefit, or of the staff should prepare and also for the benefit of the then operate an apprentice training scheme. industry at large. Generally, the parochial At meetings lasting not more than three outlook will be found to render any scheme hours weekly, a committee of seven senior impossible, simply on account of insufficient executive officials can collect and sift continuous apprentice input. evidence, build up a very thorough scheme Times to be spent in each shop by each for approval, and have it put into operation type of apprentice then have to be studied within eight months. The best chair­ (as distinct from times to be spent per detail man for such a committee is an executive training job). This leads to serious con­ whose department normally holds an opera­ sideration of possible bottlenecks, e.g., one tional balance between other (and possibly shop may take twelve lathe-hands, but may major) departments: and with such a possess only one horizontal borer. The chairman acting also as secretary, steady detail planning of apprentice movements committee progress is assured. In preparing will be found to be easily handled only by the scheme the committee should consider as means of a chart and coloured counters. much “ foreign” material as possible: Such a chart contains as Y-axis the complete other firms’ schemes, education authorities’ list of training jobs above mentioned, and as proposals, institution recommendations, fac­ X-axis sixty monthly divisions. In this way tory suggestions—all these and more provide the position of each shop as to numbers, and the bounds to the committee’s picture, when of each apprentice as to place, at each month taken in conjunction with works possibilities. of the year, can be seen at a glance. The members must travel round their own All this means clerical and other work and workshops and prepare a complete list of consequently the appointment of an appren­ individual production jobs which call for tice supervisor, responsible directly to the skill of only apprentice standard.. This will committee, becomes essential. At all points, reveal (a) that the number of individual jobs the question is raised against the committee— available for training is unexpectedly large, Do we solely train apprentices, or do we work and (b) that the number of kinds of them for shops’ output ? The committee apprenticeship needed becomes sharply de­ must be very clear and firm as to which of fined. Then comes a conflict between how these alternatives must really apply, bearing the premises ought to train and what they can well in mind that the latter probably forms actually achieve. This means that .the the main reason for the committee’s own committee may require to take into account appointment. The trade union angle must apprenticeships of combined character, as not be neglected. Apprentices’ rates of pay well as those of clearly-cut type. For are fixed by agreement between firm and example, the final list of types might be: unions, but the training programme is a technical apprentice; fitter and machinist matter for the firm only—a vital point. apprentice; electrical fitter apprentice; Without discipline any scheme will be 472 E l e c t r i c a l R e v ie w October 5, 1945

wrecked. The incoming apprentice should apprentices, their varying aspirations, be presented with a concise explanatory attitudes, and factual possibilities, makes a document stating to what he is expected to delicate task. A system of marks based on conform, and to what extent he, in turn, (time X performance) will be found to may expect the firm to conform to himself. reduce difficulty to a minimum. This document is then moulded into an Considerable detail is thus seen to be indenture (but not a premium indenture) unavoidable, and must be handled to be signed by the lad himself, his parent or methodically. The committee therefore, at guardian, and by the firm. This involves the outset, must lay down its entire scheme in contact with the secretarial department, and the form of a carefully paragraphed (and possibly with the firm’s legal adviser as each decimally indexed) code of standing orders. type of apprenticeship calls for its own type Suitably subsectioned, this code, adhered to o f indenture. strictly by all parties (including the manage­ School attendance should be made com­ ment), will ensure smooth working and pulsory by the indenture. For technical success. Moreover, one section of the apprentices, this is easily settled, but the code will instruct the supervisor as to the committee will find it difficult to compel steady compilation of a dossier for each trade apprentices to attend classes (especially apprentice, covering every movement of the evening classes) after 18 years of age. But, lad, and his results, from start to finish. since this age happens to be the age fixed Out of this dossier system evolve the future for day attendance of all juniors by the members of the firm’s own personnel—the Education Act, 1944 (at the firm’s expense) satisfactory selection of whom forms the it is wisest to limit trade apprentices’ class underlying purpose of the whole scheme. compulsion to the same age, by which time a The confidential copy of the code will reasonable opportunity has been afforded contain an appendix covering finance. On most lads to obtain the Ordinary National the basis outlined, an “ extracted ” scheme Certificate. Technical apprentices must, of will surprise the committee by its small course, continue to the Higher National, capital and annual charges. In one matter and, if possible, well beyond. only will the committee require to be particularly pointed, since the management Tuition Costs otherwise will likely be easy on cost. Under The provisions of the Education Act, 1944 the “ old ” training regime an apprentice must not be overlooked. Planning must be has usually been trained on specialist lines, made against whole-day absences as soon as i.e., he w ould m ake only from three to five the Minister of Education declares the training changes within his five years. The “ appointed day ” ; the fact must be faced new scheme provides for much wider training, that such education will be free of cost to the involving perhaps from fifteen to twenty apprentice, while, in parallel, his evening changes. school is not; and, again, that only one-half of his (coming) whole-day tuition will be Productive Efficiency technical. Thus the firm is almost bound On the old basis the apprentice became to pay evening school fees. There follows useful as an output pieceworker quite early, the cost of textbooks, stationery, etc., all earning perhaps time and 60 per cent. adding to the detail to be handled by the Under the new scheme he will not reach these apprentices’ supervisor. Furthermore, the earnings until his last years and production possibility of compassionate grants, and the costs may therefore apparently rise. Careful inquiries essential thereupon, complicate this analysis will show, however, that, his part of the picture appreciably. equivalent capabilities correspond, under the The new Act, moreover, raises the school- new scheme, to about time plus 20 per cent., leaving age by, one year. This means that, while, after the lad has completed his time, for the year in which the “ appointed day ” his production efficiency has become much occurs, there must be a sharp drop in possible superior to that which obtained under the apprentice input, and the same will recur old arrangements, so that costs are rather when the leaving age rises to 16. The transferred in incidence than increased. But committee will be led to evolve a system the committee must exercise the greatest of marking both school and works per­ care here: the rock upon which many formances towards a series of annual managements wreck the best of training prizes. To be fair as between types of schemes. October 5, 1945 E l e c t r i c a l R e v ie w 473

CORRESPONDENCE Letters should bear the writers' names and addresses, not necessarily for publication. Responsibility cannot be accepted for correspondents' opinions.

Installation Bonding of negotiation with a B.E.A.M.A. Com­ ■RECENTLY I installed a 7-5-HP motor mittee a detailed plan was prepared. This to drive a grain-drying machine in a Association took the view that the plan was not in conformity with the White Paper stone-built barn adjoining farm buildings. proposals and suitable representations were The wiring to the motor and starter are in heavy-gauge conduit, the whole being made to the Ministry of Supply detailing efficiently bonded throughout in accordance our objections and seeking amendments in with the I.E.E. Regulations. The motor, certain particulars. This was before the General Election took starter and conduit are some distance away from the drying machine, which is driven place, since when no information concerning progress has reached us, albeit attention has through long rubber V-belts. been called from time to time to the urgency The installation inspector of the local supply authority tested the installation, with of the matter. It is hoped that the publicity particular attention to the earth continuity of you have given to the matter will help to speed things up. the motor, starter, isolator and conduit, and London, IVA. everything was found to be very satisfactory. He then tested the resistance of the drying A s s o c i a t i o n o f E l e c t r i c a l M a c h i n e r y T r a d e r s . J. T . M o r g a n , machine to earth, and found it to be 16 ohms. Secretary. He insisted that the machine should be bonded in with the electrical installation. Chief Engineers’ Salaries I can well understand the need for bonding all machinery in an explosives factory or in NOTWITHSTANDING the letter of situations where the formation of static Mr. W. C. Kennett, I endorse the would be dangerous, but this particular case remarks of “ M.I.E.E.” regarding the con­ is quite beyond me and no reason was given stant discussion of salaries in electricity for it. Possibly in the next industrial supply undertakings. The salary of the installation we shall have to bond in with the public supply engineer, whatever his status, motor all line shaftings and machines belted is no more important than that of the engineer thereto ! Have any other readers engaged engaged in industry and private enterprise. on installation work had a similar experience ? Moreover the I.M.E.A. is the organisation and its journal the agency through which Burton Latimer, G e r a l d G . C h u r c h . nr. Kettering. public supply engineers can air their grievances. As it is their salaries are Disposal of Surplus higher than those of engineers in private concerns engaged on work of equal skill and ■ N your issue of September 21st, reference responsibility. U n s h e l t e r e d . is made to the fact that plans for dealing with disposal of surplus Government-owned Economy in Large Buildings equipment are proceeding very slowly. So far as industrial electrical equipment is ■ 1 is apparently regarded as an im- concerned this is, indeed, the case. The practicable step to ration electricity in Association of Electrical Machinery Traders the same manner as food or clothing are has played its part in negotiations with the rationed. If this were not so, devices would Ministry of Supply and to the best of our be introduced that would limit the con­ belief the following are the facts:— sumption of electricity over a given period In July, 1944, the Board of Trade issued of time, and if the consumption was in a White Paper setting out the Government’s excess of that allowed the consumer would policy in regard to disposals and shortly be left without a supply until the commence­ afterwards the Machine Tool Control of the ment of the next rationing period. Such Ministry of Supply was charged with the procedure is evidently looked upon as too responsibility of conducting negotiations. drastic a step to be put into effect, and yet In December last the department produced so serious did the situation become last an outline scheme and after many months winter that electricity undertakings, at times 4 7 4 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5 of peak load, were obliged to cut off the supply altogether. This had the effect of Electrical Factories producing in general what it was considered Plans for Expanded Production inadvisable to do in the particular. rBTWENTY-FOUR more Government factories, There is no reason to believe that the small with a total area of about 4 million sq. ft. householder is an offender against un­ and estimated to provide employment for nearly 17,000 persons, have been allocated by the necessary consumption. Where we do find Board of Trade for civilian production. In waste of electricity is in large buildings, addition, three Royal Ordnance Factories with either private or public where it is difficult a total area of 5£ million sq. ft. are to be used to keep a check on unnecessary consump­ as trading estates. There are many applicants tion unless somebody is employed making a for space in these and employment for upwards constant tour of inspection, and that is not of 12,000 people may be anticipated. Including possible in these days of labour shortage. those already announced in recent months, 117 Government factories, representing an area of I believe that those responsible would readily approximately 35 million sq. ft. and providing co-operate if they were provided with a estimated employment for about 220,000 means of easily seeing when they were workers, have now been allocated by the Board exceeding the limit, as are industrial establish­ of Trade for civilian industry and as disposals ments on a maximum demand tariff. depots. This could be achieved with very simple Among the latest allocations are the following: apparatus. Assuming that the supply is A. Reyrolle & Co., Ltd., North Seaton, AC, a transformer conveniently fitted adjacent Ashington, and Hebburn-on-Tyne (total 80,630 to the service meter is necessary, its primary sq. ft.), for the production of electrical equip­ ment; Savage & Parsons, Ltd., Watford By-pass winding coupled to the main circuit. The (13,000 sq. ft.), for electrical equipment; British secondary would supply current at convenient Electric Meters, Ltd., Bangor (54,600 sq. ft.)> voltage to one or more rectified moving-coil domestic electricity meters; British Thomson- instruments. These instruments which would Houston Co., Ltd., Newcastle-under-Lyme be of handsome appearance could be of the (85,600 sq. ft.), electrical appliances; D. Napier 6-in. pattern to mount on the wall, or of a & Son, Ltd., and English Electric Co., Ltd., small type to stand on the desks of one or Walton, Liverpool (1,308,000 sq. ft.), aero two of the executive authorities of the engines and electrical engineering; and Ferranti, Ltd., Crewe Toll, Edinburgh (74,750 sq. ft.), establishment. According to an agreed radio sets. figure, which could be taken as a percentage of the connected load, a red line would be Companies’ Programmes marked on the scale of the instrument. It Reyrolle’s wartime factory at North Seaton, would then be possible to see at a glance at Northumberland, mentioned in the foregoing any time what was going on anywhere in note, is to be devoted to the production of the premises. vacuum cleaners and lighting equipment. W. T. Henley's Telegraph Works Co., Ltd., The cost of all this would be almost inform us that they have acquired an up-to-date negligible. Less than £10 would in all factory at Birtley, co. Durham, for the manu­ probability cover all that was necessary for facture of their cables. The company’s factories quite a large building, and it would have at Gravesend and Woolwich are in no way the overwhelming advantage of giving the affected and will continue production as at head of the establishment an immediate present. indication of the position. He would not be Santon, Ltd., are building a -50,000 sq. ft. dependent upon subordinates for his informa­ factory near their existing works at Somerton, Newport, for the manufacture of their water- tion. heating equipment and rotary switches. It is not suggested that executives will On September 28th, Mr. Tom Johnstone, have nothing to do but keep their eye glued former Scottish Secretary, cut the first sod on to a meter all day; but there is every the site of a new factory which is to be erected probability that the psychological effect at Airdrie, Lanark, for Vactric, Ltd., for the derived from knowing when consumption production of vacuum cleaners, washing is excessive will, in the aggregate, have the machines and other domestic electrical effect of keeping down the load and dis­ appliances. Mr. Johnstone is reported to have said that the Board of Trade was sinking some pelling the impression, so prevalent in non­ £500,000 in this project. technical minds, that electricity supply The Board of Trade has granted a licence to undertakings have unlimited capacity at Philips (Blackburn Works), Ltd., to proceed their disposal. with the erection of a new factory. It is stated London, N . fVAO. L e sl ie G . T o p l is , that later a larger site is to be developed by the Associate I.E.E. com pany. October 5 , 1945 E l e c t r ic a l R e v ie w 475

PERSO NAL and SOC IA L News of Men and Women of the Industry

* N advertisement appears in this issue Capt. Oliver Lyttelton, M.P., has been inviting applications for the appointment appointed chairman of the board of Associated of director of the British Electrical & Allied Electrical Industries, Ltd., in succession to Industries Research Association (E.R.A.). It Sir Felix Pole, who is retiring on account of will be recalled th at Mr. E. B. Wedmore retired eye trouble but. remains on the board as from the directorship at the end of last year deputy-chairman. Capt. Lyttelton has held and since then Dr. S. Whitehead, assistant a number of Government posts, including director of the E.R.A. laboratories has been that of Minister of Production, and he was acting director, Mr. R. A. McMahon being President of the Board of Trade in 1940-41 secretary. The salary offered is £2,500 per and again in Mr. Churchill’s “ Caretaker annum and the successful applicant should be Government ” this year. He was previously able to take over early in 1946, or sooner if possible. Among other vacant positions advertised in this issue are the following:—Deputy chief electricity and transport engineer for Ipswich Corporation (£900-£50-£1,000); chief assistant engineer for Central Sussex Electricity, Ltd., and associated companies (£800); power station assistant engineer for Fulham (£717); and temporary meter superintendent for Birken­ head (£517). The St. Helens Borough Council has approved the appointment of Mr. J. Mills as ceputy borough electrical engineer. Mr. Mills received Capt. O. Lyttleton Sir Felix Pole his technical education at the Manchester College of Technology, of which he is an Controller of Non-Ferrous Metals (1939-40) associate, and his training with the Lancashire and he has been managing director of the British Electric Power Company. Subsequently he held Metal Corporation, JTd- the position of generating engineer with Bradford Sir Felix Pole had been chairman of A.E.I. Electricity Department until he was appointed since its formation in 1929. Before that he power station superintendent with the St. Helens was general manager of the Great Western Corporation. He is an associate member of the Railway. He has served on commissions and Institutions of Electrical and Mechanical committees dealing with many subjects. Engineers, and a member of the Institute of Fuel. Mr. E. C. Holroyde, chairman of the Mr. Robert Lee, chief electrical engineer and B.E.A.M.A. Council, is a member of the party manager at St. Pancras, reaches the retiring age of industrialists which is visiting France (and in December, when he will have completed later Italy and Switzerland) under the auspices forty-two years in the electricity supply industry of the Federation of British Industries. —fourteen in his present position at St. Pancras. Mr. George Wansbrough, chairman of A. Recommending that he should be re-engaged in Reyrolle & Co., Ltd., has been appointed to the a temporary capacity, the Electricity Committee committee which is to advise the Treasury upon records its appreciation of the services which financial assistance for industries set up in Mr. Lee has rendered to the borough. “ development ” areas. Another member is On his retirement from the position of Mr. W. L. Tregoning, a director of the Jackson borough electrical engineer of Stockport Mr. Electric Stove Co., Ltd. G. H. Oldroyd was recently presented with a Rear-Admiral G. P. Thomson, whose appoint­ wallet containing notes at a gathering of em­ ment as chief press censor has terminated, has ployees of the undertaking and members of the accepted a position with Cable & Wireless, Ltd., Electricity Committee, the presentation being and will undertake duties connected with the made by the Mayor (Councillor W. J. Davies). handling of press traffic. Mr. Oldroyd joined the Stockport undertaking Air Vice-Marshal C. W . Nutting, who has been as switchboard attendant in 1907, after having Telecommunications Adviser to the Minister served at Heckmondwike, Dewsbury, Kil­ Resident in the Middle East, has also joined the marnock and Batley. Later he was appointed combine and is to undertake special missions station superintendent and then deputy electrical overseas. engineer before becoming borough electrical engineer in 1931. He is succeeded by his The Scottish Advisory Committee of the deputy, Mr. W. R. Allcock. Electric Lamp Manufacturers’ Association made

Dt 476 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5

a presentation recently to . its secretary, Mr. present position since the department was M. W. Hime, A.M.I.E.E., F.I.E.S., who has instituted in 1925. Mr. A. E. B row ne, who has resigned to become public lighting engineer to the been appointed to succeed Mr. Higham as from Yorkshire Electric Power Co. Mr. Hime has held October 1st, joined the company in 1909 and the office of secretary for the past eight years in worked in the cashier’s and accounting conjunction with that of district engineer of departm ents until he joined the Arm y in 1914, the Lighting Service Bureau of Scotland. The seeing service in France and Belgium. On presentation took the form of a silver bowl demobilisation in 1919 he rejoined the B.T.H. subscribed for by the different sections of the cashier’s department at Rugb/, and in 1925 was electrical industry represented on the Com­ appointed chief assistant to the head o f the mittee. Tributes were paid to the work done by staff payroll department. Mr. Hime in various spheres. Squadron-Leader B. R. Sankey, A.M.I.E.E., The earlier part of Mr. Hime’s training was who joined the R.A.F. (Technical Branch) in received in the development laboratories of the 1940, has been demobilised this week and is General Electric Co., Ltd., Witton, Birmingham, returning to the International General Electric followed by experience in the test department Co. of New York, Ltd. S/L Sankey was of the British Thomson-Houston Co., Ltd., mentioned in dispatches in 1942. from which he joined the E.L.M.A. in 1934. On Friday Mr. Oscar C. Waygood, O.B.E., Amongst his work was the co-ordination of the Electric Illuminating Exhibition at the Science M.I.E.E., consulting engineer to Lewis’s, Ltd., Museum, South Kensington. left for a business tour in America and Canada. He will be away for eight weeks. Mr. G. K. Palmer, A.M.I.Mech.E., M.I.A.E., M.lnst.T., has been appointed assistant Mr. W. M. Rogerson, managing director of managing director of Brush Coachwork, Ltd., the Stella Lamp Co., Ltd., has now been with Loughborough. Mr. the company for twenty-five years. A luncheon Palmer’s first appoints was held at the W aldorf Hotel on September 15th ment was with the to celebrate the occasion and was attended by Harrow Electric Light the senior staff of the company and others from & Power Co. During the Philips group of companies. Mr. S. S. the 1914-1918 war he Eriks, managing director of Philips Lamps, held a commission in Ltd., presided. Mr. Rogerson is one of the the Royal Engineers veterans of the electric lamp industry in which and the Royal Flying he has had forty-five years’ service. Corps, and was men­ Mr. N. S. Richardson has been appointed tioned in despatches. manager of the Sales Service Department of In 1920 he joined the Alliance Wholesale, Ltd., London, and com­ Birmingham and Mid­ menced his duties on October 1st. land Motor Omnibus Major W. Gordon Martin, R.A., has been Co. and was appointed Mr. G. K. Palmer released from military service and is taking up assisistant chief engineer his appointment as A. Reyrolle & Co.’s area in 1921; in 1931 he went to Crosville Motor manager for Scotland. Major Martin has spent Services, Ltd., and in 1939 was appointed the last three and a half years in S.E.A.C. His acting chief engineer, which position he has left father, the late Mr. David Martin, represented to join Brush Coachwork, Ltd. Reyrolles in Scotland for over thirty years. Mr. H. S. Rentell has recently joined the staff Mr. C. E. Stott has retired after twenty-five of the Jackson Electric Stove Co., Ltd., as years service with A. Reyrolle & Co., Ltd. publicity manager. He joined Reyrolles as engineer in charge of Mr. S. E. Harvey-Barnes has resumed his switchgear contracts for the London Area duties as director and electrical manager of and South-East England, and later extended his Gothic Electrical Supplies, Ltd., after six years responsibilities to other areas. He actually in the Royal Air Force. reached retiring age in 1944, but agreed to Mr. 0 . H. Buckingham has been appointed a continue in the company’s service until the end director of the Hotpoint Electric Appliance Co., of the war. Ltd. Mr. Buckingham joined the staff of the Mr. W. E. Jewell, manager of the contracts British Thomson-Houston Co., Ltd., Rugby, in department of Falk, Stadelmann & Co., Ltd., 1912, and has been general manager of the completed fifty years' service with the company Hotpoint Co. since 1932. Mr. N. V. Everton, on September 5th. He joined the office staff of sales manager, Lamp Department, of the the company in 1895 and later was attached to Metropolitan-Vickers Electrical Co., Ltd., has the contracts department, of which he took also joined the board of the Hotpoint Co. control during the 1914-18 war. Under his Mr. W. H. Higham, head of the staff payroll management the department has been consider­ department of the British Thomson-Houston ably extended. Co., Ltd., Rugby, has retired after more than Mr. J. H. Child has just retired from the post forty-four years’ service. He joined the of district electrical engineer, L .N .E .R . cashier’s department in 1901 and has held his Parkeston Quay, in which position he was October 5, 1945 E l e c t r ic a l R e v ie w 4 7 7 responsible to the electrical engineer, Southern superannuation on November 27th, after forty- Area, for the electric lighting and power in­ three years’ service. stallations in the Eastern Counties part of the Mr. A. M. Hicks, general manager and system, including particularly the port installa­ secretary of Siemens Electric Lamps & tions at Parkeston Quay. The whole of Mr. Supplies, Ltd., retired on September 30th, after Child's railway service was spent at Parkeston forty-five years’ service in the Siemens organisa­ Quay, where, after gaining some experience in tion. He is succeeded by Mr. C. J. N. Borg. the United States, he was appointed foreman Mr. J. R. Naish has been appointed assistant in October, 1904, and successively assistant secretary of the company. district electrical engineer, resident engineer and district electrical engineer. Mr. H. King, assistant commercial manager, Ilford Corporation Electricity Department, has Mr. J. Pritchard, who has been concerned retired after forty-five years’ service. with post-war domestic heating questions in the Ministry of Fuel and Power, has joined Bratt A presentation has been made by the staff Colbran, Ltd., and will be responsible for the of the Shotley Bridge & Consett Gas Co. to development and sale of fuel-burning appliances Mr. A. G. I. Anderson, general manager, who for gas, electricity and solid fuel. has been appointed general manager of the Bognor Regis Gas & Electricity Co. Mr. E. J. Nicholls, the York city electrical engineer, is to retire on reaching the age of Mr. Charles Pickering, commercial and sixty-five next February. managerial assistant, Barnsley Electricity Dept., is to retire after forty-four years with the under­ Sir George Paget Thomson, F.R.S., has taking. accepted an invitation of the Council to become president of the Junior Institution of Engineers Obituary , for 1945-46. Major-General K. C. Appleyard, C.B.E., T.D., the retiring president will induct Mr. S. J. Benham.—We regret to learn of the Sir George Thomson at a meeting to be held death on September 26th, after a long illness, of in the Institution Lecture Room on Saturday, Mr. Stanley J. Benham, at the age of seventy. December 8th, at 2.30 p.m. when Sir George Mr. Benham joined Benham & Sons, Ltd., in Thomson will deliver his presidential address 1892 and becam e a director in 1899 and entitled “ Atomic Energy.” managing director in 1901.' He was still chair­ man at the time of his death. In 1909 he Sheffield Corporation Electricity Committee became chairman also of James Slater & Co. recommends the appointment of Mr. I. D. (Engineers), Ltd. He was responsible for the de­ Campbell, generation engineer, Hull Corpora­ sign and equipment of steam cooking plant for all tion, as deputy general manager at a salary of Dreadnoughts and for battleships, battle cruisers £1,100 per annum. and cruisers from 1904 to 1918. During the Mr. H. Watson, general manager of the second world war he was responsible for the Sheffield Corporation Transport Department, design and equipment of'the canteen kitchens has retired after forty-six years' service and for all Royal Ordnance Factories and their Mr. R. C. Moore, now deputy, has been promoted hostels, and he was intimately connected with to the vacancy at a salary of £1,500 per annum. similar work for War Department camps. Mr. A. M. Mulliner, A.M.I.E.E., borough Mr. J. Y. Fletcher.—There was a large electrical engineer and manager of Middleton gathering at the funeral service for the late (Lancs) since 1924, has' retired owing to ill- Mr. J. Y. Fletcher at Christ Church, Virginia health. Water, on September 26th. The General Mr. L. M. Butler, assistant manager of Walsall Electric Co. was represented by Sir Harry Conduits, Ltd., has been elected a director of Railing (chairman), who was accompanied by the company. Lady Railing, Mr. L. C. Gamage (vice-chairman) Belfast Transport Committee of the Corpora­ and the Hon. Mrs. Gamage, Dr. C. C. tion last week placed on record its appreciation Paterson, G. Chelioti and F. Winstanley of the services of Mr. Samuel Carlisle, deputy (directors), and Mr. T. Dyke (joint secretary), to the general manager and engineer, Lieut.-Col. as well as many members of the staff. M’Creary. Mr. Carlisle is about to retire after Mr. R. Tervet.—We regret to report the forty-five years’ service with the Corporation, death on September 18th of Mr. Robert Tervet practically all of it in close association with the in his sixty-ninth year. Mr. Tervet entered the transport branch, and the last six years as service of the Fowler-Waring Cable Co. in acting general manager while Lieut.-Col. 1894 and continued in service with the Western M’Creery was on active service. Electric Co. when the latter took over the Mr. J. S. Wills, an executive director of the business in 1898. In 1908 hejoined the London British Electric Traction Co., has been elected Electric Wire Co. & Smiths, Ltd., in whose chairman of the Council of the Public Transport service he remained up to the time of his retire­ Association. ment in 1940, with the exception of a few years Mr. G. E. Turner, assistant station engineer in when he was with the Concordia Electric Wire B lack b u rn electricity undertaking, is retiring on Co. 478 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5 The Adelaide Company considered that the fact that the company has to carry a heavy tax burden is sufficient reason Commission’s Recommendations for taking over the business. The proposed I N December last year the South Australian terms of purchase would involve the debenture ® Government appointed a Royal Commission and preference stockholders in a heavy loss; to inquire into the operation of the Adelaide the purchase price should be the present capital Electric Supply Co., Ltd., and to report whether value of the undertaking and not the market further legislation was-necessary. Mr. Justice value of its shares. It is mentioned that the Reed was chairman and the other members Government already has the power to regulate were Mr. J. W. Wainwright, State Auditor- prices but after repeated investigations has not General (nominated by the Treasurer), and found it necessary to use this power. Professor A. L. Campbell, Bonython Professor The directors say that they have no indication of Law, Adelaide University (nominated by the of the Government’s intentions regarding the com pany). report but every possible step is being taken to A unanimous report was issued by the safeguard the stockholders’ interests. Commission in August and a summary of this has been circulated by the company to stock­ holders. In this the Commission recognises Measuring Appliance that the management has been efficient and economical and the supply, on the whole, has Saturation been adequate and according to recognised RA M PLIN G tests designed to give an indica- standards. The preference dividends are tion of certain electrical statistics of a considered liberal and the Commission says large body of consumers by examination of a that the issue of preference shares at a high relatively small sample are described in a report rate of dividend is not a wise policy. The just issued by the Electrical Research Associa­ ordinary dividend was 12 per cent, from 1911 tion, ref. K/T. 113, entitled “ Measurement of to 1930, 10 per cent, from 1934 to 1944 and Appliance-Saturation Factors by Means of it appears that the rate will not exceed 7 Sampling,” by J. R. Isaac and G. O. McLean, per cent, for some years. The rates of interest 15s. 6d. on debentures are reasonable. Tables and graphs illustrate the effect of the Fair Charges magnitude of the saturation factor and of the sample size on the accuracy of the estimate. The company’s charges are. considered to be The procedure recommended distinguishes fair; they cannot be reduced unless the tax between bulks well above 20,000 consumers and burden is eased or coal prices are lowered. It smaller ones. In the former case the minimum is suggested that future capital at Treasury sample size is 500 consumers, whereas for the rates would result in reduced capital costs and latter guidance is given for the reduction of the lower charges. It is thought that the freedom size of sample. In both cases the sample is of the company to expand its area or to refuse drawn by picking out consumers’ record cards supplies militates against the development and at equal quantitative intervals, as determined co-ordination of supplies throughout the State. by the relation between bulk size and chosen The Commission recommends that the assets sample size. An example of the application of and liabilities of the company in South Australia the theory is provided with the aid of a collection should be acquired by a “ South Australian of 20,000 actual consumers’ inventories. Electricity Trust,” the price to be based on the market value of the shares at August 1st, 1945. Employees of the company would be given the Assistance for Development-Area Firms right to continue their employment at their existing rates of salaries and wages and on the HE appointment is announced of the T Development Areas Treasury Advisory same conditions. Capital for the undertaking’s Committee which is to examine applications future operations would be raised at current for financial assistance from concerns proposing Treasury rates. to set up industrial undertakings in the If the recommendation for acquisition is “ development areas ” specified in the Distribu­ not carried into effect the Commission recom­ tion of Industry Act, 1945. The Committee mends the fixing of the company’s charges will recommend that assistance should be given by regulation and a three-yearly inquiry into if it finds that there are good prospects that the undertaking will be able to carry on without the company’s affairs. Another recommen­ further help under the Act and that those dation is that the State Electricity Commission concerned cannot obtain the necessary capital should at once hold an inquiry into the co-ordi­ on reasonable terms from other sources. nation of supplies throughout the State and Firms seeking to qualify for assistance must that in the meantime it should have the right first obtain the approval of the Board of Trade to veto further extensions. (Assistant Secretary, Control of Factory and In the opinion of the directors of the company Storage Premises, Millbank, S.W.l) as comply­ ing with the provisions of the Act. Applications the inquiry did not disclose any ground for for assistance should then be addressed to the suggesting that the public interest had not been Secretary of the Committee, Treasury Great fully safeguarded by the company. It is not George Street, S.W.l. October 5 , 1 9 4 5 E l e c t r i c a l R e v ie w 4 7 9 Margins of Sciences Influence of Physical Research HE merging of the sciences in electrical television would have been long delayed. T engineering was the theme of the Then on the industrial side proper there inaugural address of Dr. J. L. M i l l e r were the electronic control of resistance (British Insulated Callender’s Cables, Ltd.) welders, heating by high-frequency AC, the as chairman of the North-Western Centre mercury arc and ignitron types of rectifier. (Manchester) of the Institution of Electrical As regarded insulation the physicist had Engineers on Tuesday last. not at first sight played such a direct role. It was pointed out that the blending of the In the main his practical contribution in this sciences had been greatly accelerated during field had not really extended much beyond the last twenty years, so that electrical the development of measurement techniques research had become more physical in and the provision of data about phenomena. character, and engineering designers were Such work nevertheless had enabled the now utilising, more frequently and with less engineer as progress continued more adroitly delay, the results of such research. to choose the most suitable material, more One of the reasons, which Dr. Miller consistently to process it and more accurately examined, was the paramount necessity of to incorporate it in the overall design of obtaining solutions to problems arising out equipm ent. of the increases which took place after the last war in the ratings and voltages of plant. Calculation Without Measurement In the main these solutions required the help The electric cable industry was a good of the physicist which, in turn, brought illustration. But if the physicist had not research departments into greater pro­ played a direct practical role in insulation, minence, so adding further impetus to the position might drastically change in the progress. Then, too, the effect on advance future. It was to-day possible to calculate, of nation-wide electrical schemes, like the using the latest theories of molecular C.E.B., must not be forgotten and the structure, without recourse to a single influence of physical research during wars electrical measurement and from thermal was a further prompting. Additionally, data alone, the permittivity, loss factor, developments in radio and electronic temperature and frequency relationships for technique had powerful repercussions on all a group of simple dipolar substances. branches of electrical engineering. In radio Further, for a large group of crystalline particularly, engineering and physics were so substances the breakdown voltage could be inextricably interwoven as to create an calculated from optical data alone. industry of applied physics. Such physical research could not yet be extended to include synthetic polymeric Applications of Electronics substances. Nor could it have important Dr. Miller then went on to deal with two repercussions on existing insulating materials specific branches of electrical engineering in as paper, cotton and varnish, but having regard which the physicist was very directly con­ for the advances which were being made cerned indeed. Electronics, for instance, towards an understanding from the chemical had found its most obvious application in point of view of the influence of the molecular telecommunications; nevertheless it had also structure on the electrical behaviour of had a profound influence, sometimes almost existing synthetic materials, it was quite as an industrialised branch of applied possible that in due time the molecular physics, in other fields. physicist and the chemist would have so far Measurement was a case in point. advanced their techniques that they would Apparatus for the measurement of small be able to present materials which would quantities, the X-ray tube, X-ray diffraction have a molecular structure specifically de­ equipment and the electron microscope were signed to satisfy at least some of the require­ having a marked effect on engineering ments of the engineer. progress, while the cathode-ray oscillograph The physicist and the chemist had already had become an indispensable electronic proved their worth as important specialists measuring device. Without it, progress in in electrical insulation. If and when they power transmission, switchgear, radio and attained the ultimate goal, they would become 48 0 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5 essential parts of this branch of electrical assisted to increase their volume of funda­ engineering. No one could guess where mental work, that industry should increase such progress would lead, but certainly its own quota of such work, that many of great benefits would accrue. the university courses in electrical engineering In concluding, Dr. Miller reviewed some and physics needed overhauling and, an of the administrative, research and educa­ increasingly difficult problem, that industry tional difficulties which arose out of the itself must ensure a full flow of individuals, growing number and wide range of sciences with the necessary breadth of view and and techniques that were to-day included in capable of appreciating the impact of science electrical engineering. Among the points he on industry, to fill the higher technical posts raised were that the universities should be in the future.

Forthcoming* Fvents Friday, October 5th.— London.— Institution of Relay Equipment for Use on Systems Protected Mechanical Engineers, 5.30 p.m. First James by Petersen C oils,” by L. S. B. Golds. Clayton Lecture : “ The Early History of the E xeter.—I.E.E. Devon and Cornwall Sub- Whittle Jet Propulsion Gas Turbine,” by Air Centre. Royal Clarence Hotel, Exeter, 3 p.m. Commodore Frank Whittle, C.B.E. Inaugural address by the chairman, P. S. Grant. Newcastle-upon-Tyne.—Neville Hall, West­ gate Street, 6.30 p.m. I.E.E. North-Eastern Friday, October 12th.— London.—St. Students’ Section. Chairman’s address by Stephen’s Tavern, Bridge Street, Westminster, H. H ilton. 6.30 p.m. E.P.E.A. Meter Engineers’ Group Manchester.—Engineers’ Club, 6.45 p.m. (Southern Division). “ Meter Jewels and Manchester Association of Engineers. Presi­ Pivots,” by G. F. Shotter. dential address by C. S. Youatt. Manchester.—Engineers' Club, 6 p.m. I.E.E. North-Western Centre Radio Group. “ Studio Saturday, October 6th. — Manchester. — Technique in Television,” by D. C. Birkinshaw, Engineers’ Club, 1.15 p.m. I.E.E. North- M.B.E., M.A. Western Students' Section. Luncheon (tickets Saturday, October 13th.— Manchester.— At 5s.) followed at 2.30 p.m. by chairman’s address G eographical Society, 16, St. M ary’s Parsonage, on “ The Place of the Gas Turbine in Future 2.30 p.m. Junior Institution of Engineers (N.W. Electricity Generation,” by B. V. Poulston. Section). Annual general meeting and presi­ Leeds.—Electricity Offices, Whitehall Road, dential address by L. H. A. Carr, M.Sc.Tech., 2.30 p.m. I.E.E. North Midland Students’ M.I.E.E., on “ The Engineer’s Tools—Words Section (jointly with students of the Institution and Figures.” of Civil Engineers, Yorkshire Association). “ Some Recent North American Hydro-Electric Monday, October 15th.— London.—Institution Projects, with special reference to the Boulder of Electrical Engineers, 7 p.m. London Students’ Dam,” by W. A. Hatch, M.B.E. Section. Chairman’s address by H. Shorland, B.Sc. (Eng.), on “ Tuning Forks.” Monday, October 8th.— London.— C axton Birmingham.— G ran d H otel, 6 p.m . Birming­ Hall, S.W.l. Institution of Rubber Industry, 6.30 p.m. “ Electrically-Conductive Rubber,” ham Electric Club. “ Technical Education in by D. Bulgin. the Present and Immediate Future,” by C. F. Newcastle-upon-Tyne.—Neville Hall, West­ Partridge, B.Sc., M.I.E.E. gate Street, 6.15 p.m. I.E.E. North-Eastern Tuesday, October 16th.— London.— Lighting Centre. Chairman’s address by W. Dixon. Service Bureau, Savoy Hill, 6.15 p.m. Associa­ Tuesday, October 9th.— London.— School of tion of Supervising Electrical Engineers. Hygiene and Tropical Medicine, Keppel Street, Presidential address by E. R. Wilkinson, W.C.I, 6 p.m. Illuminating Engineering Society, M.I.E.E., preceded at 5.45 p.m. by short films Induction of new president, H. C. Weston, and on “ The Atom ” and “ The Face of Britain presidential address. (Refreshments, 5.30 p.m.) (The Grid System).” Leeds.—Electricity Offices, Whitehall Road, London.—At Institution of Electrical En­ 6 p.m. I.E.E. North Midland Centre. gineers, 2.30 p.m. British Society for Inter­ Inaugural address by A. Kelso, chairman. national Bibliography. Induction of new president, Dr. S. C. Bradford, presidential Wednesday, October 10th.— London.— In stitu­ address on “ Fifty Years of International tion of Electrical Engineers, 5.30 p.m. Radio Documentation,” and discussion on “ Technique Section. Chairman’s inaugural address by of Making Abstracts of Scientific and Technical A. H. Mumford, B.Sc. (Eng.). Papers,’ to be opened by Eng. Comdr. D. London.—E.L.M.A. Lighting Service Bureau, Hastie Smith. 2, Savoy Hill, Strand, 5 p.m. Illuminating Manchester.—Engineers’ Club, 6 p.m. I.E.E. Engineering Society. Exhibition of film, “ Let North-Western Centre Installations Group. Us See ” (Lessons in Industrial Lighting). “ Modern Electric Lift Practice,” by L. S. Thursday, October 11th.— London.— In stitu­ A tkinson. tion of Electrical Engineers, 5.30 p.m. Installa­ Cardiff. At South Wales Institute of En­ tions Section. Inaugural address of the chair­ gineers, 6.30 p.m. I.E.E. Western Centre (jointly man, Forbes Jackson. with Civil and Mechanical Engineers). Discussion Cardiff.—Electricity Offices, The Hayes, 6.30 ot the Report on the Severn Barrage Scheme to p.m. Electrical Power Engineers’ Association be introduced by Sir William Halcrow and S. B. (Western Division). “ A Modern Earth-Fault Donkin. Admission by ticket only. October 5, 1945 E l e c t r ic a l R e v ie w 481 Technical Education Laboratory Equipment : Value of College Engineering Societies

CiO M E aspects of technical education, of money would not bear scrutiny and the a more domestic and practical character practical side was so important that it must than those already discussed officially, formed be kept constantly in mind in all general the subject of the inaugural address. at plans for reform. Cardiff last Monday of Mr. J. B. J. H ig h a m The cost of adequately equipping scattered (School of Mines and Technology, Treforest) small institutes conducting evening courses as chairman of the Western Centre of the would be prohibitive; an alternative would Institution of Electrical Engineers. be the provision of mobile touring labor­ Starting with a criticism of the manner in atories and a common syllabus for laboratory which machines and testing equipment were work in institutes acting as feeders to arranged in the laboratories of technical technical colleges. colleges, the chairman remarked that local education authorities should be prepared to Importance of English spend the money necessary to equip the Mr. Higham next directed attention to various departments properly. But there had the need to train students to express their been cases of large sums of money being thoughts plainly in simple English at an spent on schemes which were too elaborate earlier stage than is often done. To allow in the first instance; in a number of in­ students to progress to the ordinary, and stitutions large space had been provided in sometimes higher, National Certificate stages which apparatus had been spread about before they had satisfied the I.E.E.’s require­ indiscriminately without being properly ments in respect of the English language was planned because its disposition had been equivalent to putting the cart before the left to a contractor. horse: extremely poor handwriting was also very evident. Room for Development Students were urged to give more support A laboratory should never be filled in to college engineering societies, which “ one grand effort ” without leaving room offered excellent opportunities for learning for development, which was best decided by how to conduct meetings properly, how experience. The installation of unnecessarily to express ideas in public without self- large machines, too firmly fixed on massive consciousness, and how to argue and discuss foundations, often caused reluctance to matters in an orderly way. There was need scrap old and obsolescent plant. The for the amplification of certain advanced present contrasting tendency to install lecture work by short discourses to be machines under benches carrying test instru­ delivered by engineering specialists, pre­ ments was even worse, having regard to ferably from local manufacturing concerns, the necessity for easy access and free with ample time allowed for discussion to inspection. follow. In the early stages of their laboratory work students should themselves connect up The Use of Films the machines and instruments they used. Cinematograph films could be utilised to For more advanced work the provision of great advantage in amplification of, but not properly wired test tubes was recommended, to replace, formal lecture work. Only under to save time and reduce risk of damage to exceptional circumstances should lecture- costly instruments. demonstrations be used as an alternative to There was no intention to spoon-feed laboratory work; their proper function was students, but many of them looked upon to amplify and they needed much more care practical work as a period in which to ease and thought in preparation. off, whereas it was one of the most important Mr. Higham demonstrated a simple device parts of their training. Twice the time for use in conjunction with a cathode-ray usually spent on laboratory work would not oscilloscope, whereby many transient elec­ be too much and it had become more than trical phenomena could be illustrated, thus ever necessary to keep apparatus up to date. avoiding the need for elaborate and expensive The argument that industry should find the apparatus. 482 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5 Design and maintenance Too-Frequent Inspections and Overhauls

VIEW that is expressed, By J. H. M. Sykes model next year or the year perhaps somewhat vaguely, after; and I expect you to at nearly every gathering at which maintenance scrap your existing machine and buy a new engineers are present is that designers of one when this becomes available.” modern electricity supply plant are tending This, of course, is a very different view­ more and more to unload many of their point from that of the switchgear and trans­ responsibilities on to maintenance staffs. former designer, and in any case could not Every successive design is accompanied by be applied as it stands to the electricity instructions which stress the necessity for supply industry. But it is open to question regular maintenance to more and more whether or not a partial change towards this details at shorter and shorter intervals. policy would not be an excellent thing. Whereas old instruction books frequently A motor-car is a piece of apparatus on said : “ This component which lives depend every needs only a semi-annual Closer contact between designers minute it is in operation; inspection” and “ It should and users would obviate a good and a supply transformer’s deal of maintenance work or, at not be necessary to over­ function, though vital, least, increase the intervals between haul this (detail part) essential inspections. Designers cannot claim a higher more than once in twelve should consider maintenance ex­ “ priority ” than life. months,” the newer books penses as well as initial cost There are millions of are full of such exhorta­ motor-cars and millions tions as : “Grease this bearing at three-monthly of distribution switches and transformers; the intervals,” “ After every fault clearance the average price of the car would probably work breaker should be thoroughly overhauled ” out quite near that of the average transformer. and “ The air conditioning device should be If something of the basic principles in the light inspected weekly.” British Standard Code of which automobile engineers commence of Practice B.S. 1086/1942 mentions many their designs were applied to the switch switchgear items which need three-monthly and transformer, some advantage might attention. accrue. The present state into which power supply Too Many Auxiliaries ? plant designers have drifted is attributable Every new design, while possibly in the main, to over-specialisation. The simplifying the apparatus which performs designer, in general, seldom visits the sites the main function, like breaking the circuit on which his plant is installed; he knows that or regulating the voltage, seems to bring in it will, in the testing station, perform the its train endless auxiliaries which all need functions for which it was intended, but he monthly, weekly, or even daily attention. has been gradually placed in a position so There are always more grease nipples, remote from the influence of operating auxiliary switches and contacts. Breathers, conditions that he ceases to take much contactors, air safety valves, anti-con­ interest in its behaviour once it is satis­ densation heaters, automatic fire-fighting gear factorily installed. and the like are always being added. This condition is the opposite of that Design and Practice which holds good in the automobile industry. Suggestions for remedying this state of Here the designer says in effect : “ I give you affairs fall into two categories. The first is the latest device for the purpose you require; the desirability of the designer being in closer I ask you to do the irreducible minimum contact with site conditions not only at the of maintenance and I aim to make this less time of erection but also after three or four each year. I fit accessories which are years have passed. He should be able to moulded or welded assemblies and which I talk freely with the maintenance staff, and instruct you to replace in toto in the unlikely have access to the necessary records. Only event of their failure; but I also stress this in this way would their difficulties be brought point—the product is cut to the smallest home to him. He would hear of inaccessible possible price and I expect to produce a new auxiliary switches, of covers with a multitude October 5 , 1 9 4 5 E l e c t r ic a l R e v ie w 483 of unnecessary bolts which try the temper and before him, he should first decide whether absorb valuable time, and he would gain the lessened cost of the initial installation some idea of the time important commercial will not be offset, in ten years’ time, by circuits have to be out of commission for increased total maintenance costs. Although maintenance. he will obviously not have to pay these costs The second suggestion is aimed at the himself, the undertaking with an up-to-date designer’s outlook when he develops a new costing system will soon come to realise "their design. If a new principle, or the application significance, and these increased costs will of a new development (such, for instance, ultimately militate against the manufacturer’s as the extended use of plastic materials) is reputation. L ig h tin g 44 Plioenix ” How Continuity of Work was Achieved

MONG the largest By Brig. P. W. L. Broke-Smith, Thames between the A- components of C.I.E.. D.S.O., O.B.E. London dock area and the “ Mulberry ” pre­ and F. A. Hulcoop, A.M.I.E.E., F.I.E.S. Rainham, Essex, and fabricated port were were formed by ex­ some 150 reinforced-concrete breakw ater cavating an area approximately 220 by 150 ft. units manufactured under the code word to a depth of 15 to 20 ft., in which two units “ Phoenix.” Each of these units, which were could be accommodated side by side. constructed in the form of open-topped It was intended to do this part of the work vessels, had bases,' side walls and sloping by scrapers, and lighting fittings, mounted on ends 15 in. thick with a central longitudinal 20-ft. poles round the periphery of the area, partition and ten trans­ verse partitions 9 in. thick, forming twenty- two bulkheads. They provided the outer wall of the harbour, and varied in size from the largest type, 204 ft. long, 56 ft. wide and 60 ft. high, weighing approximately 6,000 tons, to the smallest which was 175 ft. long, 28 ft. wide and 25 ft. high, weighing about 1,670 tons. The project was com ­ menced in October, 1943, and the need for continuous working entailed the provision of external lighting

which, since nearly all Arrangement of “ scuttle 1 type lighting fittings on an almost complete the constructional sites “ Phoenix ** unit were situated in areas vulnerable to enemy air attack, viz., dry were installed. Owing, however, to heavy docks, basins and shore sites, called for autumnal rains, a change was made to special designs. In dry docks adequate bucket excavators, drag lines and dumpers, materials-handling facilities existed, but basin with portable local lighting at the working and shore sites had to be equipped with plant points, assisted by masked headlamps on including cranes, hoists and concrete mixers. the various machines and vehicles. When Basins were scattered on both banks of the the basin was completed the floor was floated 484 E l e c t r i c a l R e v ie w October 5, 1945

over with a thin cement rendering on which from a floor or door switch so that the driver 4-in. hollow floor tiles were laid and these, could not vacate his cab and leave the lamp in turn, were covered by a layer of building burning. paper. Shuttering was then placed at the Wherever possible construction sites were sides and swim ends of the units and the connected to the industrial air-raid warning reinforcing bars laid over the base of the system; additional facilities were arranged craft ready to receive the concrete. with the Ministry of Home Security, the The most satisfactory means of illuminating “ purple ” or “ lights ” warning message this stage of the work was by “ scuttle ” being transmitted to all sites over constantly fittings mounted 15-ft. high and spaced along manned telephone lines. the sides of the units over the points where Lighting could not have been extinguished the transverse walls would, when erected, without danger, since many men would have meet the sides. Two fittings were also placed been left in exposed positions, some on over the swim ends at each side. This scaffolding 50 or 60 ft. high, with no means arrangement resulted in fourteen fittings per of finding their way to ground level. Where side and, in addition, a row of fourteen possible, the whole of the site and unit concentrating vitreous-enamelled reflectors, lighting was supplied from an auto-trans- spaced similarly to the “ scuttle ” fittings, former and, on receipt of a warning, the were installed 15 ft. high along the centre supply voltage was reduced to 30 per cent, line of the units. of normal, lowering the illumination value to 0-002 ft.-candle which remained in opera­ Low but Uniform Lighting tion for 4 minutes, after which the lighting By equipping the side fittings with 40-W was extinguished. In a second system voltage pearl lamps and the central row with 25-W was reduced by inserting a resistance into the pearl lamps, an almost uniform illumination lighting circuits. value of 0-2 ft.-candle was obtained over the Where neither of the above methods could whole of the base. As the side, end, central be applied, full, lighting was retained for and transverse walls grew up from the base 15 seconds after receipt of the warning and (an average lift was 3 ft. per day), the lighting then extinguished, but routes from the units fittings were raised to maintain a height of (and other working areas) to shelters were approximately 15 ft. above the work. marked by shaded hurricane lamps which The comparatively low value of 0-2 ft.- remained in operation throughout a warning candle proved, due to its uniformity, adequate period. Similar lamps were also employed at for all but the more critical tasks of placing obstructed points under the first two systems, reinforcement and shuttering, for which so that the site should not be left in total work shielded handlamps with 15-W lamps darkness in the event of supply failure. were provided. Concreting was normally carried out during daylight, but not infre­ Removal for Completion quently a lift had to be completed after dark. The units could not be completed at basin Local switching limited the lighting to areas sites in view of the excessive excavation work where work was actually in progress. A this would have entailed in providing a value of 0-2 ft.-candle was also adopted for channel between the basin and the river. other areas surrounding the basin where The units, when about half their full height, concrete mixing, bar bending, etc., had to were therefore floated for completion to be carried out. Scuttle fittings with 40-W prepared berths in the London Dock area, pearl lamps, mounted 15 to 20 ft. above this being accomplished by cutting away the ground level, were again employed, with bank between the river and the basin at low additional shielded local lighting. tide. The rising tide flooded the basin and On cranes, which, in some cases, were fitted floated the unit which was then towed to its with 80 to 100 ft. jibs, a pendulum-hung new berth with the lighting system intact. fitting, damped to prevent excessive swinging The accident rate did not increase when in high winds and comprising a vitreous- artificial lighting was in use; the total number enamelled concentrating reflector with a matt of fatal casualties for the whole of the black skirt 24 to 36 in. deep and 200-W “ Phoenix ” project was twelve, of which lamp, was installed at the top of the jib so two occurred during darkness and were not that the load was always illuminated. A attributable to insufficient illumination. This screened 15-W lamp in the driver’s cab result was largely due to the carefully planned lighted the controls. This lamp was operated lighting installations. October 5, 1945 E l e c t r i c a l R e v ie w 485 r o ip illtn : and I MUST 1C V Tax Relief Suggestions. Fulham Munitions “ Factory.” F.B.I. and War Taxation the technical aspects of the specification and to establish a system of certification of approval of T HE Grand Council of the Federation of designs and prototypes by a Government British Industries has sent to the Chancellor of Department. Meanwhile shipowners who re­ the Exchequer a report on the “ demobilisation ” quire radar sets are to be provided with sets of war taxes prepared by its Taxation Com­ made for the Admiralty during the w ar for use mittee. The report aims at giving the Chan­ in merchant ships carrying officers trained in cellor some guidance as to the priority in which their use and maintenance. Other forms of wartime taxes should be abolished or reduced, navigational aids are being investigated by the and it is said that those taxes should first be Ministry with the assistance of an Advisory dealt with which experience shows to act as Committee. the gravest deterrents to productive enterprise. The first cancellation should be o f those taxes Sulphuric Acid Prices which constitute forced loans which the State is pledged to repay; these are the reduction of Direction No. 4 (S.R. & O. 1945 No. 1170) personal income tax allowances and the issued by the Minister of Supply under the difference between 80 per cent, and 100 per cent, Control of Sulphuric Acid (No. 2) Order. 1940, excess profits tax. The latter tax should be provides new maximum prices for all sulphuric repealed at an early date, together with the acid of strengths between 136 deg. TW. at national defence contribution. 60 deg. F. and 25 per cent, free SOs content. There appears to be every reason for abolish­ The Direction came into force on October 1st. ing the purchase tax on goods which are essential to the equipment of houses and it is not a S.E. London Technical Institute desirable tax to retain for any length of time. It is also of the greatest importance from the Special courses in high-voltage engineering point of view of production that there should be and electric circuit calculations are being held some reduction in the standard rate of income at the South-East London Technical Institute, tax. Lewisham, S.E.4. The first commenced on Wednesday last; it is under the general direction Overseas Trade Statistics of Professor W. J. John, B.Sc., and comprises The Board of Trade announces that publica­ twelve lectures at the Institute and twelve tion of the detailed monthly Trade Accounts laboratory periods at the Queen Mary College. will be resumed in the normal form beginning The lecturer for the other course, which began with the issue for January, 1946. Accounts on September 28th, is Dr. Tropper. It consists relating to the first half of 1945 have already of a revision of advanced mathematics for the been published, and further detailed accounts first six weeks followed by tSree separate six­ are to be issued for the first nine months and weekly periods covering progressive groups of for the whole year. In addition, a monthly subjects. summary (on the lines of those issued during 1940) will be published showing the July and Radio Equipment for Uruguay August figures for each group distinguished in The first post-war contract for a new broad­ the overseas trade statistics, with further casting station in South America has been summaries for October and November. awarded by " Radio Rural,” Montevideo, to the Marconi Company. The equipment, com­ Heating New Houses prising a 5-kW medium-wave transmitter, is Representatives of more than a hundred being constructed at the Marconi Works, municipal authorities, manufacturers of heating Chelmsford, to the latest British designs. appliances and representatives of tuel producers and distributors will meet at Caxton Hall, Munition Work at Power Station S.W.l, on October 19th (10 a.m.), under the aegis of the National Smoke Abatement Society Fulham Electricity' Committee has prepared a to consider improved heating methods for new report on the manufacture of munitions at the houses. The conference will be opened by power station during the war. The foreman in Mr. C. W. Key, M.P., Parliamentary Secretary charge of munitions was formerly the charge to the Ministry of Health. hand of the power station service department, a first aid attendant was trained as a jig and tool fitter and turner, two wiremen transport Radar for Merchant Ships drivers became tool setters and a substation A conference of scientists and representatives attendant became a tool setter and operative. of Government Departments which have had The remaining munition workers were women experience of radar used for defensive purposes who were trained for the work, either part or has prepared a performance specification for a whole time. Since the manufacture of munitions general purpose outfit suitable for use on ceased many of these women have been engaged merchant ships as an aid to navigation. The on work for the electricity undertaking, such as Ministry of War Transport has communicated the repair of boiler furnaces (w'orking inside the specification to manufacturers and others boilers), the repair of domestic apparatus, etc., concerned for their information and guidance and as wiremen’s mates on war damage repairs. in production. The Ministry is also arranging When there w as a heavy demand for the making to make available to manufacturers advice on of tools, jigs and fittings, all the fitters at the 486 E l e c t r i c a l R e v ie w October 5, 1945 power station volunteered to help by working communications in peace; Mrs. Kathleen overtime after their normal working hours. Lonsdale, one of the first two women to be In the main the existing plant was used, appointed Fellows of the Royal Society, will, although one or two new tools had to be from her researches into X-ray crystal analysis, purchased where the work demanded a high outline the important work done by women standard of efficiency. One particular tool scientists behind the scenes; and Sir Harry which proved invaluable in operation was Railing will explain how the engineer translates m anufactured in 1893 and was bought from a into practical workaday facts the laboratory silversmith in Sheffield. The electricity under­ discoveries of the scientist. taking entered into the work on a competitive The Women’s Engineering Society is holding basis and although operating as a subsidiary to its own annual conference to coincide with the the power station, it met competition in the birthday celebrations of its daughter-association, usual way and there was no financial loss. A and Miss M. M. Partridge will give her presi­ bonus system was introduced for the operatives dential address on “ The Next Twenty-One and tool setters and the whole operation was Y ears.” distinguished by a spirit of keen competition and hard work. Two or three shifts were in Women Electrical Workers’ Conference operation throughout the day and night accord­ ing to circumstances, and the staff never left Representatives of the 8,000 women members their machines throughout the enemy air raids. of the Electrical Trades Union met at Filey, Yorks, on Saturday on the occasion of the first Paint Manufacturers’ Organisation conference of the Union’s Women’s Section formed last year. Mr. Frank Foulkes, president Particulars have been sent us of the Society of of the Union, who presided, hoped that in the British Paint Manufacturers (Amberley House, future the women would not hold their con­ Norfolk Street, Strand, W.C.2) which has been ferences separately but would have representa­ formed to establish united action for the benefit tives at the Union’s main conferences. The and advantage of its members. It is also Union wanted them to take their place so that proposed to form “ consumer divisions ” which they could hold the highest office in the will act as a link between manufacturers and organisation. Miss Harris, of Tottenham, was their customers for the discussion and solution unanimously supported in her plea that married of common problems. The Society aims at women should be allowed to stay in industry resisting monopolistic tendencies and inter­ if they wished. ference with free enterprise and intends to foster good labour relationships. The president Education in Heating and Ventilating of the acting council is Mr. C. G. Heywood, chairman of Pinchin, Johnson & Co., Ltd. A booklet entitled “ Technical Education in the Heating and Ventilating Industry ” has just Mercury Price Reduced been published by the Education Board of the industry (secretary, Mr. F. J. Packer, 103, It was announced last week that the price of Borough Road, London, S.E.l). It sets out the mercury was to be reduced from October 1st by facilities which are available for the training of £38 10s. per bottle (nominally 76 lb.). The heating and ventilating engineers—operatives' existing price for spot metal was about £69. and technical courses (with syllabuses) and a The price just before the war was £16 10s. For scheme for ex-service personnel. Names and some time past the price of mercury here has addresses are given of the secretaries of the been about half that ruling in the United States. Area Committees of the Heating, Ventilating and Domestic Engineers’ National Joint Indus­ Air Mail to Australia and New Zealand trial Council, together with the constitution of The Department of Overseas Trade announces the J.I.C. Advisory Committee and of the that pending the re-establishment of unrestricted special committee set up by the Institution of air-mail services to Australia and New Zealand, Heating and Ventilating Engineers to formulate the Government has introduced a limited air­ the technical course. mail service for the benefit of business firms to supplement the present service by air to North Training for Business Administration America and thence by surface route. The Committee on Training for Business E.A.W.’s Twenty-first Birthday Administration under the chairmanship of Sir Frank Newson-Smith, set up by the Minister of On October 11th H.R.H. the Duchess of Kent Labour and National Service, was asked to will open the exhibition which the British consider the question of training in business Electrical Development Association has administration and salesmanship, to make arranged at the Dorland Hall, Regent Street, recommendations about suitable courses of London, to celebrate the Electrical Association training, and to advise on the best method of for Women’s twenty-first birthday. Following receiving recognition of such training. the opening. Sir Stafford Cripps, President of The Committee has now recommended that the Board of Trade, will speak at a luncheon a short course of training of about three months, given by the E.A.W. to the electrical industry, run in association with local educational and there will also be an evening reception. authorities and commercial and technical “ Women and Wireless,” “ A Woman colleges, and in collaboration with industry and Physicist Looks Back ” and “ After the Scientist, commerce throughout the country, would be the Engineer ” are three subjects which will be both appropriate and effective. It has also treated in a symposium of speeches at the proposed that, wherever desirable, special Institution of Electrical Engineers on October courses should be arranged in co-operation with 12th. Sir Robert Watson-Watt will tell of particular industrial and commercial groups, to women’s vital part in radar in war and tele­ meet the needs of the business groups concerned. October 5, 1945 E l e c t r i c a l R e v ie w 487

The proposals are designed to train suitable Electrical Engineering Co., Ltd., and sub­ ex-service men apd women so as to fit them for sidiaries; “ Training on the Job,” by Mr. M. N. employment which will lead to administrative Exton-Wood, M.Sc. (National Institute of and executive posts in industry and commerce, Industrial Psychology); and “ Trade Union and help them to gain the fullest advantage from Aspects,” by Mr. H. T. Edwards (Transport their individual qualities of character and their and General Workers’ Union). The chairman experience developed in war service. of the Brush Foremen’s Association is Mr. W. The Ministry has appointed Mr. F. C. Hooper Smith and the secretary, Mr. R. A. Savage. as director of business training to supervise the planning and carrying out of a training scheme, Mass Radiography for Reyrolle’s which is an important part of the plans, already far advanced, for helping men and women to The first company within the Durham County secure posts suited to their capabilities. Council’s area to avail itself of the mass radio­ graphy service for taking miniature X-ray Apprentice Training photographs of the chest is A. Reyrolle & Co. Higgs Motors, Ltd., Witton, Birmingham, Trade Publications have sent us a copy of a booklet which they Siemens Electric Lamps & Supplies, Ltd., 38, have produced as a guide to their apprenticeship Upper Thames Street, London, E.C.4.—Priced scheme. There are two forms of apprentice­ list (No. 980) illustrating “ Sieray ” fluorescent ship ; that which aims at giving a general lamps, fittings and accessories, including circuit training, qualifying those who take it for diagrams and details, superseding earlier list of positions on the company’s technical or com­ same number. mercial staff, and a trade apprenticeship which John M. Henderson & Co., Ltd., King’s W orks, enables those who wish to follow a particular Aberdeen, Scotland.—Liberally illustrated trade to serve their time in the appropriate brochure of 60 pages describing applications of department. mechanical handling and transporting equip­ The term of apprenticeship is four years; no ment, including cranes of all types, coal and ash premiums are required and apprentices are paid plant, electric aerial cableways and telphers, and on the agreed scale. An annual bonus, more electric furnaces. than enough to cover technical school fees, books and tools, is paid to those whose conduct Applicants for these publications should write and work are satisfactory. The company has on their firms’ business notepaper. an arrangement with the Aston Technical College by which apprentices attend there for Trade Announcements one afternoon and two evenings a week. Craig & Derricott, Ltd., manufacturers of The booklet contains illustrations of the control devices and the “ Diacam ” rotary company’s works and products. switch, have moved into a new factory the address of which is Royal Works, Sutton Import Licensing Department Coldfield, near Birmingham (telephone: Sutton The address of the Import Licensing Depart­ Coldfield 2547). ment of the Board of T rade is now 189, Regent Mummery & Harris, Ltd., 46-50, Connaught Street, London, W.l (telephone: Regent 4090). Avenue, Frinton-on-Sea, state that they are extending their electrical department to include Gauge and Tool Exhibition the sale of refrigerators, cookers, washing machines and other domestic equipment. The Gauge and Tool Makers’ Association is E. H. Jones (Machine Tools), Ltd., have arranging an exhibition of its member-firms' opened new offices at 2, Albion Place, Leeds, 1. products at the New Hall, Vincent Square, Simmonds Bros, have moved to Bedcote S.W.l, from January 7th to January 19th Mill, Birmingham Street, Stourbridge, Worcs. inclusive. There will be nearly a hundred (telephone: Stourbridge 57730). stands and one of the principal objects of the The new address of the London Commercial exhibition will be to stimulate export trade. Electrical Stores is 20-22, Cursitor Street, Chancery Lane, London, E.C.4 (telephone: Brush Foremen’s Conference Holborn 7180/1022). The third annual conference of the Foremen’s New Process Welders, Ltd., have closed their Association of the Brush Electrical Engineering Southall factory and moved to new premises in Co., Ltd., was held at the company’s works at Molesey Road, Hersham, Surrey (telephone: Loughborough from September 21st to 23rd; Walton-on-Thames 1007). All correspondence the theme of the conference was “ Education should be addressed to their London office, and Training in Industry.” The 140 delegates 76, Victoria Street, London, S.W.l, and com­ included the foremen of the company and its munication direct with the factory should be subsidiaries and foremen from other industrial made only in special circumstances. concerns throughout the country. Mr. F. S. The offices of the Lincolnshire & Central Mitman, managing director of the company, Electric Supply Co., Ltd., the Mid-Lincolnshire presided at the dinner opening the conference on Electric Supply Co., Ltd., Altrincham Electric the first evening, at which Dr. Mont Follick, Supply, Ltd., Campbeltown & Mid-Argyll M.P. for Loughborough, was the principal guest. Electric Supply Co., Ltd., the Keswick Electric During the various sessions the following Light Co., Ltd., Thurso & District Electric addresses were delivered;—“ Adult Education: Supply Co., Ltd., Windermere & District Education for Social Responsibility,” by Mr. Electricity Supply Co., Ltd., and Public Utilities E. Green, J.P. (Secretary, Workers’ Educational (Electric), Ltd., have been moved to 820-826, Association); “ The New Education Act: Salisbury House, Finsbury Circus, London, Some Practical Considerations,” by Mr. D. B. E.C.2 (Telephone: Clerkenwell 5738; tele­ Hoseason, assistant managing director, Brush grams : Linxelek. Ave, London). 488 E l e c t r i c a l R e v ie w October 5, 1945 I.E.E. Chairmen—III Biographies of Centre Officers

PB>HE chairman of the Mersey and North Wales Vickers Electrical Co., Ltd., as a college -*■ Centre of the Institution of Electrical apprentice, being eventually appointed to a post Engineers, Mr. J. 0. Knowles, M .A ., is chairm an in the motor design (general engineering and joint managing director of BrookhirstSwitch- section) department. In 1929 he was appointed gear, Ltd., with whom he has been for twenty-six research engineer in the transformer depart­ years, having joined the company in 1919 as a ment of Ferranti, Ltd., rising to the position student apprentice. He is also chairman of of chief research engineer to the company. In Cantie Switches, Ltd. Born in Neyoor, Travan- 1941 he becam e deputy chief engineer o f British core, South India, Mr. Knowles who is fifty, Insulated Cables, Ltd., being appointed chief was educated at Eastbourne College and King’s engineer in June, 1942. College, Cambridge, where he was a Foundation In 1932 Dr. Miller gained the Laboratory Scholar and obtained first-class honours in the Prize of the Institute of Physics, of which he is Mathematical Tripos. Since 1943 he has been a Fellow, and in 1934 the D.Eng. degree of

Mr. J. O. Knowles Mr. R. I. Kinnear Dr.J. L. Miller Mr. G. D. Arden a member of the B.E.A.M.A. Council and has Liverpool University was conferred upon him served on B.E.A.M.A. and B.S.I. Technical for his various published contributions. In Committees over a number of years. 1934 and 1938 respectively he was awarded Mr. Knowles’s paper on “ Layout and the Paris Exhibition and Sebastian de Ferranti Rupturing Capacity of Low-tension Switch- premiums of the I.E.E. He is on the Council gear ” was awarded the Page Prize in 1937. of the Research Association of British Rubber He is the author of several other papers and Manufacturers, and is a member of numerous of a number of articles in the Electrical Review B.S.I. and E.R.A. technical committees. He and other technical publications. He has been is also a member of the American Institute of actively connected with matters relating to the Electrical Engineers. education of apprentices in the Chester area. Mr. G. D. Arden, chief electrical and power The new chairman of the Scottish Centre, engineer to the National Oil Refineries, Ltd. Mr. R. I. Kinnear, is chief electrical engineer (Anglo-Jranian Oil Co., Ltd.), Skewen, Glam., to John Brown & Co., Ltd., engineers and ship­ who has been elected chairman of the West builders, Clydebank, with whom he has served Wales Sub-Centre, was born in South London for forty-four years, having passed through in 1884. After training at the Crystal Palace all branches of the company’s electrical depart­ Engineering School he became a pupil in the ment’s activities. He was made a M .B.E. in Exeter Corporation Electricity Department in 1942. Mr. Kinnear, who is sixty, was born at 1903, becoming shift engineer and mains assis­ Aberfoyle and attended the Clydebank Higher tant a year later. At Exeter he assisted in the Grade School and Glasgow Technical College. erection of a new power station, the conversion Dr. J. L. Miller, the new chairman of the o f the 100-cycle system to 60 cycles, and the North-Western Centre, is chief engineer (equip­ installation of the tramways. In 1906 he was ment and telecommunications) of British appointed mains engineer at Southampton Insulated Callender’s Cables, Ltd., and a and was later mains superintendent. In 1912 director of several associated companies. He he went to Derby as chief mains engineer. was born in 1902 at Wallasey where he received From 1915-20 he served in the Signal Service, his early education at the Grammar School Royal Engineers, with the B.E.F. in France and before going to Liverpool University. After then became ch’ief electrical engineer to Ironside taking the Ph.D. degree in 1925 for post­ & Co., exporting consultants. He joined the graduate research he joined the Metropolitan- Anglo-Jranian Oil Co., Ltd., in 1926. October 5, 1945 E l e c t r i c a l R e v ie w 489 ELECTRICITY SUPPLY Kenilworth House Installations. Rate Relief at St. Pancras.

Bermondsey. — Cookery Classes for w'orking balance and agreed to allocate £30,000 T e n a n t s . —Realising that many of the new for post-war developments, and in making good hutment tenants and others have no experience damage by enemy action £13,980 has been of electric cooking, the Electricity Committee spent. There is thus a balance of £15,150 and proposes to institute a series of electric cookery' the Committee recommends that £15,000 shall classes at the Jamaica Road showrooms on be appropriated for the relief of the rates. Thursday afternoons. Owing to the limited accommodation available, invitations will be Stockton-on-Tees.—New’ Substations.— In issued weekly to about a dozen new tenants or connection with the erection of 461 houses on prospective tenants, and later the invitations the Darlington Lane estate the chief engineer will be extended to any residents w'ho may be and manager of the Electricity Department interested. It is also proposed to ask the (Mr. N. Hunter) has submitted estimates for school authorities to send scholars interested in the erection of two new substations together housewifery to the classes. with modifications at an existing substation. The total cost is estimated at £20,653 and it Chesterfield.— Supply Scheme.— Following is proposed to make application for permission the receipt of a petition from residents, the to borrow this amount. Electricity Committee has obtained authority from the Electricity Commissioners to proceed Stoke Newington.— Extensions. —The Elec­ with a scheme for supplying Cutthorpe with tricity Committee is to extend cables and electricity. provide new' substations at a cost of £50,134. Glasgow.—Modernisation of Pumping West Lothian.—Lighting in C ouncil Houses. S t a t i o n . —The Sewerage Committee has asked —At a meeting of the County' Housing Com­ the Electricity Department to report on a mittee it was complained that fifty houses in one proposal to change over from steam to electricity district had been without light for a month at the Kinning Park pumping station. owing to failure of the gas supply. The Com­ Renew'al of Cables at Gasworks.— The mittee agreed that electric light should be gas manager has been authorised to arrange for installed in all Council houses where gas was the Electricity Department to install new cables unsatisfactory. and external lighting system at the Provan Wood Green.—Tariff for Temporary works at an estimated cost of £9,500. H o u s e s . —The Northmet Power Co. has in­ Installations in Schools. —The Education formed the Housing Committee that the terms Committee has arranged for the Electricity for supplying electricity' to Portal type houses Department to install electric lighting at the will be the “ all-in ” rate with a fixed charge of Albert and Balgray schools at a cost of £697 lOd. per week and id. per kWh plus 121 per and to change over the system at Kinning Park cent, for all electricity consumed. A request cooking department at a cost of £850. by the company that the Council should collect Hackney.— Fuse Replacem ents. —At present the weekly fixed charge with the rent, subject to a charge of Is. 6d. is made for fuse replacements an allowance of 5 per cent, to cover the cost of on consumers’ premises. It is proposed that in collection, has been agreed to. future the work shall be carried out free of charge, as before the war. Overseas Jarrow-on-Tvne.—Overhead D istribution.— Canada.—Columbia Development Surveys. The North-Eastern Electric Supply Co., Ltd., —It is reported that preliminary surveys have has submitted plans to the Corporation for been begun with a view to developing additional supplying electricity' to temporary houses by power from the Columbia River. A final means of overhead lines. The Corporation has engineering plan is not expected for five years; approved the plans, but has expressed its it will be presented to the International Joint preference for underground cables. Commission which will make recommendations to the Canadian and United States Governments. Kenilworth.—Electrical Equipment of According to Electrical News and Engineering H o u s e s . —The Housing Committee proposes to (Toronto) the plan envisages the construction of install electric lighting and power, including dams all along the Columbia River. The electric cookers and washboilers in 200 houses potential capacity is given as 30,000,000 HP. to be erected on the Bulkington Estate. Spain.—Pow tr Supplies Cut.— Further cuts K ent— Street Lighting C ontract. — A com ­ in electricity supplies are being made in the bined meeting of the Westbere and Sturry eastern and central provinces, including Madrid. Parish Councils, at which Mr. W. B. Stockdale, Towns will be supplied only between 7 a.m. and of the S.E. Kent Electric Pow er Co. outlined a noon or between noon and 5 p.m. on alternate scheme for electric street lighting, unanimously days, while villages will have to make do with resolved to accept the company’s tender. It two hours’ supply daily. Cafes and public was stated that the Councils felt that the houses must reduce consumption to 40 per renovation of existing gas standards, and the cent, or be liable to immediate withdrawal of erection of additional ones, would be too costly. supplies. Theatres and cinemas will be limited St. Pancras.— A llocation of Profits. —The to one show a day'. Finance Committee has considered the alloca­ Under a trade agreement signed on September tion of profits of the electricity undertaking; 15th, £150,000 w'orth o f electric power is to be for the vears 1939 to 1944 these totalled £79,140. imported to Spain from France during the next The Council has already set aside £20,000 as a six months.— Reuter. 490 E l e c t r i c a l R e v ie w October 5, 1945 South African Commission Plant Extension Programme

■ •LANS of the South African Electricity The report of the Commission (signed by Dr. -*- Supply Commission for power plant H. J. Van der Bijl, chairman) which gives this extensions, held up by the war, are being information refers to the increased cost of the pressed forward as rapidly as the equipment power station extensions now in progress, can be obtained. The most important scheme adding that by comparison with pre-war prices is the construction of the Vaal station, the design the rise in the cost of some items of plant is of which envisages an installed capacity of almost 100 per cent., which seems to the Com­ 200,000 kW with provision for extension. In mission to be excessive. This and other factors, 1939 an order for three turbines and a house it is stated, may necessitate increases in elec­ set was placed with the Swedish firm of A.S.E.A. tricity charges which hitherto it has been possible but because of the war these could not be to avoid. shipped. In 1940 two sets were ordered from At December 31st last 806,650 kW of plant the Metropolitan-Vickers Electrical Export was installed in the Commission’s main stations Co., Ltd.; they were received in January last and a further 277,500 kW was on order. The and were placed in service in April. At the output for the year reached the record total end of the year there were five 33,000-kW and of 4,543-8 million kWh, an increase of 123-1 one 7,500-kW sets together with six 190^000 million kWh (2-8 per cent.) on the previous lb. per hr. boilers in course of installation or year. Sales amounted to 4,415-8 million kWh on order for the Vaal station. an increase of 140-2 million kW h (3-3 per cent.). Delay in the completion of extensions at The average cost per kWh sold advanced Congella is necessitating the utmost economy slightly from 0-1787d. to 0-1818d. and the price in consumption in the Durban undertaking. received from 0-1743d. to OT755d. (including Although badly needed, a 40,000-kW set sundry revenue, from 0-1790d. to 0T805d.). ordered in 1939 was released by the Com­ mission for use in Britain where it was installed Cheap Coal at Earley. Unfortunately, replacement plant Coal costs per ton of 2,000 lb. varied from a sent in 1943 was lost at sea through enemy mere 2s. 4d. at Witbank (this includes haulage action. A second 40,000-kW set for a further by the Commission's own locomotives and extension was ordered last year, together with trucks from adjoining collieries) to 23s. 4d. two additional 200,000 lb. per hr. boilers. In at Sait River. The lowest consumption of connection with the extensions, the 33-kV coal per kWh sent out was 1 -507 lb. at Colenso outdoor type switchgear is to be equipped with (average BThU per lb. of coal 12,280; thermal a fixed spray washing installation devised by efficiency 18-43 per cent.) but at Klip with the Commission’s engineers. coal of a lower calorific value (9,120 BThU In the Natal Central undertaking the Colenso per lb.) the average consum ption o f 1-763 lb. station is to be extended by the installation per kWh sent out gave a thermal efficiency of of an additional 25,000-kW set and two 180,000 2 1 -22 per cent. lb. per hr. boilers, with provision for two The revenue for the year was £3,321,870 further duplicate sets and four boilers. Three (against £3,189,782) to which is added £31,638 cooling towers are to be constructed and a adjustment in respect of the Witbank under­ new air-conditioned control room is to be taking, making £3,353,508. Total expenses built with a semi-circular system diagram. were £3,345,681 (£3,185,146) and there was Railway Electrification thus a balance of £7,827 (£4,636). An addendum to the report contains figures Another project concerns the Cape Town for the whole of the Union extracted from the Corporation’s Table Bay station (operated 1942-43 industrial census. This gives the total under a pooling agreement with the Com­ electricity generated as 7,699-8 million kWh mission’s Salt River station). Permission was with 6,638-4 million kWh sold. Consumers obtained from the British authorities in 1944 numbered 374,919, of whom 317,368 were for the manufacture of a 40,000-kW set and domestic, sales to the latter during the year two 230,000 lb. per hr. boilers, which it is hoped averaging 2,666 kWh. There was a total will be ready in time for the 1947 winter load. installed plant capacity of 1,857,582 kW in In the Cape area an important scheme of main­ 314 stations. line railway electrification is to be carried out by the South African Railways and Harbours Magnetic Crack Detector Administration, the first part of which covers rBTHE Equipment & Engineering Co. informs 160 miles from Cape Town to Touws River; -B- us that the DC impulse model crack detector consideration is also being given to the electri­ described in our issue of August 10th last incor­ fication of a further 179 miles of track as far as porates a “ Westalite ” rectifier manufactured Beaufort West. by the Westinghouse Brake & Signal Co Ltd October 5, 1945 E l e c t r ic a l R e v ie w 491

1| I C I 4 I M I V I I C O I t l 4 II»'\S Notes on New Electrical and Allied Products

Modern Wash-boiler Spalding Street, Leicester, is a development of A SQU ARE type wash-boiler of up-to-date de- the “ Drytex ” model illustrated in the Electrical sign is the latest product of the N orth W est Review of April 21st, 1944. In place of the PUfi Engineering C o., Copse Road, Fleetwood, swan-neck suction pipe of the earlier design '**;■ Lancs. It is of attractive appearance, having the dust-laden air enters the new cabinet in a less obtrusive manner. Pipes connect a polishing machine or grinder, for example, directly to a low-velocity settling chamber in which the larger particles of grit are deposited, while fluffy lint is collected by a special trap. The finer dust then passes upward to a filter composed of a series of mats, to the outside of which the fine dust adheres. This kind of filter is claimed to occupy half the space needed by the conventional bag type. The cleaned air passes on to the exit at the top of the cabinet, through a curved-blade fan driven by a totally enclosed motor running at 2,800 RPM. The heavier dust and fluffy lint are collected in the lower drawer, while the lighter dust from the mat filter is deposited into the same receptacle by a simple hand­ shaker lever at the side of the cabinet. The

Square flat-top wash boiler off:.' no sharp corners or edges, and a flat top makes & it suitable for use as a table. The 3-kW elements have 3-heat control by means of two 15-A i fill; kick-down switches at the side. The more LiaH expensive model is vitreous enamelled with a feali chromium-plated top, the standard model il -a* having a galvanised finish for both case and top. Engine Timer jjjg-r A new engine timer recently designed by Runbaken Electrical Products, 71-73A, Oxford Road, Manchester operates on an entirely new principle. The h.t. current from T... the sparking plugs “ triggers ” a discharge from condensers which arc fed by an internal con­ Polishing machines fitted with dust collectors vertor, and the result is an intense flash of exceptionally short duration. Its brilliance will unit construction of these collectors enables ~.', illuminate fly-wheel marks even in daylight, and them to be re-disposed in a machine shop with greatly simplifies timing and checking of engines. facility, or transferred to different shops. Models are now available for 6, 12 and 24 V. £ Hyderabad Project. — It is reported that ,f Dust Collectors the Nizam of Hyderabad has sanctioned the Godavary Valley development scheme which .¿¡its Self-contained dust-collecting cabinets for is estimated to cost Rs. 24 crores. It is expected ¡dels® attachm ent to individual machine-tools, which to bring 800,000 acres of land under irrigation tsi'0 are announced under the trade name of and to make available 75,000 kW for industrial iadT « 0 rymat ” by D allow , Lambert & Co., L t d . , development. 492 Electrical Review October 5 , 1 9 4 5 I IVAVI IAL SECTION Company News. Stock Exchange Activities.

cent, for the year to July 1st last (against 10 per Reports and Dividends cent, for 1943-44). The trading profit for the The Nigerian Electricity Supply Corporation, year, after providing for depreciation, etc., is Ltd.—The accounts for the year ended February £202,930 (£207,098), to which is added £16,000 28th last record a total revenue of £225,524 (nil) for E.P.T. recoverable. The net profit, (against £198,192) and a net profit of £147,845 after deduction of income tax, is £116,330 (£134,471). As already reported, a final (£105,098). dividend of 5 per cent, and a bonus of 2 per The Sudan Light & Power Co., Ltd., reports a cent, (making 10 per cent, for the year) are again total revenue of £47,834 for 1944. The net being paid, less tax at 5s. 2d. in the £. After profit was £31,834 (£31,543). General reserve providing £75,500 (£65,000) for taxation, receives £5,000 (nil) and a dividend of 5 per £9,638 (£13,005) for debenture interest, £13,622 cent. (6 per cent.) is to be paid, leaving £43,125 (£12,850) for debenture redemption and £7,500 (£39,970) to be carried forward. (£26,500) for general reserve, £16,200 (£15,036) is carried forw ard. The Brazilian Traction, Light & Power Co. has It is stated that costs have steadily risen but declared a dividend of $ 1 per share on the no increase has been made in charges to con­ no-par-value ordinary shares. With the $1 sumers. The unprecedented lack of rain in dividend paid in June this again makes $2 for April and May last resulted in practically a the year. month’s operation being lost. The Jerusalem Electric & Public Service Woking Electric Supply Co., Ltd.—Referring Corporation, Ltd., recommends a first and final to the note in our issue of September 21st dividend of 5 per cent, on the ordinary shares, regarding the deferment of consideration of the the same as last year. payment of an interim dividend, the company The S.W. & S. Electric Power Co. announces says that when the question of payment of an interim dividends of 4 per cent, on the “ A ” interim ordinary dividend is dealt with it is the ordinary and 2 \ per cent, on the “ B ” ordinary practice of the directors to have in front of shares. them a half-yearly balance sheet. Owing to sickness and depleted staff in the accounts The Midland Electric Corporation for Power department it had been found impossible to Distribution, Ltd., is maintaining its interim prepare the figures in time for the meeting held ordinary dividend at 3 per cent. on September 11th, and the matter was therefore The South Wales Electric Power Co. announces held over. an interim dividend of 2 p er cent., the same as The directors met again on September 25th last year. and, with the accounts before them, resolved to The Wessex Electricity Co. is paying an pay, on October 8th, the usual interim dividend interim dividend of per cent. (same). of 3 per cent, free of income tax on the ordinary 2 shares in respect of the year ending December The Urban Electric Supply Co., Ltd., has 31st next. declared an interim dividend of 4 per cent. (same). The Dubilier Condenser Co., Ltd., reports a profit for 1944-45, after the deduction of E.P.T., The Salisbury Electric Light & Supply Co., of £47,068, against £47,462 for 1943-44, and a Ltd., proposes to pay the usual interim dividend net profit of £19,917 (£25,682). General reserve of 4 per cent. receives £ 10,000 and the ordinary dividend is The St. Austell & District Electric Light & raised from 10 to 20 per cent., leaving £22,895 Power Co., Ltd., announces an unchanged (£25,675) to be carried forward. Last year interim dividend of 4 per cent. £ 10,000 was transferred to war contingencies reserve. The Telephone & General Trust, Ltd., is maintaining its interim dividend at 3 per cent., H.T.A., Ltd.—This company (formerly Hall less tax at 8s. 6d. Telephone Accessories, Ltd.) announces that in Newman Industries, Ltd., have again declared view of changes in the manufacturing programme an interim dividend of 7-J per cent. caused by the end of the war it has been decided Cable & Wireless, Ltd., announce the payment to defer consideration of a dividend until the of an interim dividend of 1 ^- per cent., as last accounts for the year to December 31st next year. are available. W. T. Henley’s Telegraph Works Co., Ltd., Herbert Morris, Ltd., are paying a final has announced the usual interim dividend of 5 dividend of 15 per cent., free of tax, again per cent. making 20 per cent, for the year. The profits (after meeting taxation) totalled £129,586, against £145,683. New Companies Hallcroft Electrical & Mechanical Apparatus Rawlings Bros., Ltd.—The net profit for the Co., Ltd.—Private company. Registered year ended March 31st last was £7,261 (£8,078). September 19th. Capital, £1,000. Objects: The ordinary dividend is again 7-J- per cent. To acquire the business of an electrical and The Renold & Coventry Chain Co., Ltd., is general engineer carried on at Radford, paying a final ordinary dividend of 7 per cent, Nottingham, by John Woolley, and to carry on and a bonus of 2 | per cent., making I 2 i per the business of electrical, radio, refrigeration October 5, 1945 E l e c t r i c a l R e v ie w 4 9 3

fi1} i?eneiS engineers, etc. Subscribers: J. 1,500,150 ordinary stock units taken up. Woolley, 38, Norwood Road, Radford, Notting­ £269,980 paid. £305,027 10s. considered as paid. ham ; and F. E. Galvin, 35, Park Street, Beeston. Mortgages and charges: £50,000. Secretary: W. A. Hickling. Registered office: Holly Lane, Chilwell, Notts. Vulco Dry Battery Co., Ltd.—Capital, £8,000 in 1,500 preference and 6,500 ordinary shares of I lor! Goddard Sound Equipment, Ltd.— Private £1. Return dated December 31st, 1944 (filed 1( !l; company. Registered September 15th. Capital, March 10th, 1945). All shares taken up. jju. £2,000. Objects: To carry on the business £3,667 paid. £4,333 considered as paid. (I,. of electrical engineers, manufacturers of sound Mortgages and charges: Nil. nfj equipment, etc. Subscribers: Joan E. Penney, 48, Huddleston Road, N.7, and Marjorie I. L. Newcastle & District Electric Lighting Co., Leaver, 40, Gaskarth Road, S.W.12. Secretary: Ltd.—Capital, £600,000 in £1 ordinary shares. ■bo: H. Williams. Registered office: St. Albans Return dated April 6th, 1945. 600,000 shares fe Farms, Staines Road, Hounslow Heath, taken up. £600,000 paid. Mortgages and "'Ifs- Feltham, Middlesex. charges: £350,000. ..¡¡V F. Renco, Ltd.—Private company. Registered Electric Ignition Laboratory, Ltd.—C apital, September 13th. Capital, £500. Objects: To £2,000 in £1 shares. Return dated March 5th, carry on the business of manufacturers of, and 1945. 1,500 shares taken up. £1,500 con­ <#Ci dealers in, electrical goods, bulbs, lamps and sidered as paid. Mortgages and charges: Nil. irt o: accessories, neon signs, ultra-violet ray apparatus, A Ik etc. Subscribers: Renee Sharon, 9, Dunmore Intercommunicating Telephone Manufacturing tel: House, Templecombe Road, E.9, and Eileen Co., Ltd.—Capital, £100 in 100 shares of £1 Hawtin, 1, Temple Road, N.W.2. Secretary: each. Return dated December 28th, 1944, j: , R. Sharon. Registered office: 203, Regent filed February 1st, 1945. 100 shares taken up. Street, W .l. £100 paid. Mortgages and charges: Nil. Jinx.' A. A. Electrical Co., Ltd.—Private company. Egyptian Power Syndicate, Ltd.— C apital, Registered September 18th. Capital, £300. £10,000 in £1 shares. Return dated January Objects: To carry on the business of manu­ 12th (filed April 3rd). 2 shares taken up. £2 facturers of, and dealers in, electrical and wireless paid. Mortgages and charges: Nil. ; goods, etc. M. C. George, C.A., 8, Cato Road, S.W.4, is the first director. Registered Walter Lambert, Ltd.—Capital, £1,000 in £1 office: 19-20, Holborn Viaduct, E.C. 1. shares. Return dated March 31st. 602 shares I foh taken up. £602 paid, Mortgages and charges : P. R. Mercen, Ltd.— Private company. Nil. Registered September 18th. Capital, £100. Objects: To carry on the business of manu- Rylands Electrical Co., Ltd.— Capital, £1,000 1 EE facturers of electrical goods and accessories, in £1 shares. Return dated April 17th. All fes: bulbs, valves, neon signs, radio goods, etc. shares taken up. £1,000 paid. Mortgages and Subscribers: Eileen Hawtin, 1, Temple Road, charges: Nil. N.W.2; and Jean Domnitz, 29, East Bank, N.16. Secretary: R. A. Sharon. Registered office: Increases of Capital 203, Regent Street, W .l. Sterling Cable Co., Ltd.—The nominal capital 7 Twenty Four Hours Sign Co., Ltd.— Private has been increased by the addition of £49,900 10" company. Registered in Edinburgh September in £ 1 ordinary shares beyond the registered 10th. Capital, £3,000. Objects: To carry on capital of £ 10 0 . Stull. the business of electrical and mechanical ill- engineers, manufacturers of electrical con­ Mortgages and Charges densers and electrical apparatus of all kinds, etc. Directors: W. Highgate, 121, Kyle Park Drive, Correx Communications Equipment, Ltd.— 7“ Uddingston, Glasgow, and five others. Regis- Mortgage on moneys under contracts, dated ~ tered office: 66, Carntynehall Road, Glasgow. Septem ber 11, 1945, to secure all moneys due or to become due from the company to Barclays Companies’ Returns Bank, Ltd. Statements of Capital Receivers Released British Thomson-Houston Co., Ltd.— C apital, Electroflow Battery & Engineering Co., Ltd.— £4,000,000 in £1 shares (2,000,000 preference E. W. Rufus ceased to act as receiver on lii»c and 2,000,000 ordinary). Return dated April August 27th. aLS 6th, 1945. 1,500,000 preference and 2,000,000 ordinary shares taken up. £3,425,310 paid. British Lion Battery Co., Ltd.— H. Zam it £74,690 considered as . paid. Mortgages and ceased to act as receiver on August 31st. ’ V charges: £1,075,260. I: ■ Interohm Electrical Insulators, Ltd.—Capital, Liquidations £45,000 in £1 shares (36,000 preferred ordinary Amazon Telegraph Co., Ltd.—Winding up and 9,000 ordinary). Return dated May 4th. voluntarily. Liquidator, Mr. A. C. Dickinson, All shares taken up. £36,000 paid. £9,000 A.C.A. \fftl considered as paid. Mortgages and charges: jitff Nil. Bankruptcies Ericssons Telephones, Ltd.—Capital, £700,000 A. C. W. Wilson, electrical engineer, Wepre, “ • in 199,970 preference shares at £1 each, 499,970 Higher West Cross Lane, Swansea.—Order for W' ordinary shares of 5s. each and 1,500,150 discharge made August 8th subject to debtor’s * ordinary stock units of 5s. each. Return dated consenting to judgment being entered against I®« April 12th. 199,970 preference shares and him for £25.

i 4 9 4 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5 STOCKS AND SHARES Westinghouse Brakes gained 3s. to 77s. 6d. and Reyrolle at 73s. 3d. are -fc higher. Telegraph Tuesday Evening. Constructions have risen Is. to 58s. 6d. and JBJHERE is a good deal of business doing in British Thermostat at a guinea show an equal Stock Exchange markets. Continuance of improvement. Ever Ready are 9d. up at 42s. 3d. the Thanksgiving Campaign throughout the Other gains range from 6d. to Is. In the country exercises a curb upon activity in gilt- electricity supply market, some of the provincial edged securities, but the investor who favours shares are a little easier; otherwise, there are industrial shares is steadily absorbing good class no changes worth mentioning. Amongst over­ equities. In the latter group are included the seas shares, Cawnpore Electric further advanced ordinary shares of electrical equipment and 2s. to 61s. 6d. Tokyo Electric hardened to 56}, manufacturing companies. Outside this range,, Montreal Power rose to 25. The activity in such stocks as Cable & Wireless preference are Brazilian Traction continues. Declaration of attracting attention. The radio group is more the usual $ 1 half-yearly dividend failed to animated than it has been of recent weeks. affect the price of 30J. Home Railway stocks continue their upward movement. Southern preferred, standing at Murex 77 a few weeks ago, from which it fell 12 points Murex brings up its dividend for the year, to in a fortnight, is now up to 70. The 5 per cent, June 30th last, to the usual 20 per cent. This preference, a full trustee security quoted at 12 1 makes 180 per cent, distributed over the past last July, lost 16} points before rallying to 107}. nine years. The company’s profits are £26,000 London Passenger Transport stocks are fairly down on the year, due to a falling off in the steady. demand for the company’s products in the British Electric Traction deferred remains closing stages of the war and to the liquidation dull at 1005. Thomas Tilling shares stand at of stocks held by users and Government Depart­ 51s, Bristol Trams are 3s. 3d. lower at 50s.; ments. The report and chairman’s statement shares have changed hands at 49s. will be published on October 20th, and the meeting held nine days later. The price of the Home Electricity Supply shares has fallen 4s. 6d. to 97s. 6d., showing at The fall which took place in the ordinary that figure a yield of a trifle over 4} per cent., shares of electricity supply companies has been allowing for inclusion of the final dividend and reduced fairly considerably by a subsequent bonus payable on the 30th of next month. rally, but prices are still well below those at which they stood before the General Election Wireless and Cables result became known. The rally is due in no For the time being, A. C. Cossor are the small part to substantial orders to buy the most active shares in their particular group. shares from what are called “ institutional ” The price has risen a florin to 44s. 6d. Philco investors, amongst which may be reckoned are changing hands on th e . basis o f 14s. 6d. insurance and trust companies, the banks, and E. M.I. shares hold their recent recovery at similar bodies. Most of the floating supply 33s. 9d., and E. K. Cole remain firm at 37s. 6d. of shares has now been absorbed, and although Telephone Rentals, at the advanced price of prices are well below the pre-election figures, 13s., are the subject of investment notice on the market has taken on a healthier tone. post-war prospects. Dividend Declarations Cable & Wireless preference improved to 115. The ordinary retains its advance to 91}. Globe H.T.A. has disappointed its shareholders by Telegraphs are a good market, the ordinary at deciding to defer consideration of a dividend 42s. 6d. and the preference at 30s. 6d. Canadian until the accounts for the year to the end of Marconi’s at 19s. 3d. continue to be bought by December next are available. For years past Montreal. Oriental Telephones at 65s.—about the company has paid a 5 per cent, interim 8s. above their recent low level— reflect the dividend in September. The final for each of hopefulness felt about the company’s outlook the past four years has been 5 per cent., plus now that Japan is defeated. 2 } per cent, bonus, making 1 2 } per cent, for the year. On the announcement the price fell Television 2s. 9d. to 26s. 3d. The argument runs that as television is fairly Other dividend declarations are, in nearly certain to be one of the popular industries in every case, the same as those of a year ago. early post-war days, shares in the companies Newman Industries, by the way, paid 22} per that deal with it must be worth notice. On the cent, for last year, against 20 per cent, in the other hand, it is contended that the business of previous twelvemonth, and at the price of television will be, colloquially speaking, cut to 7s. 6d. the yield is £6 8s. 4d. per cent. ribbons. A small feature in this department has been a rise from 2s. 6d. to 4s. 3d. in Cinema Movements in Prices Television deferred shares. The company Midland Electric Manufacturing shares at 7J started, it may be remembered, as Baird Tele­ are 5s. up and De la Rue at 11 are similarly vision, Ltd.; it is now one of the constituents better. The list shows a majority of rises. of the Gaumont-British organisation. October 5 , 1945 E l e c t r ic a l R e v ie w 41

SWITCHGEAR

VERITYS Ltd. ASTON, BIRMINGHAM 6 Sales Headquarters : BRETTENHAM HOUSE, LANCASTER PLACE, W.C.2 4 2 E l e c t r i c a l R e v ie w October 5 , 194 5

FISCHER BEARINGS CO. LTD., WOLVERHAMPTON

Associated with British Timken Ltd. October 5 , 1 945 E l e c t r ic a l R e v ie w 4 9 5 Tliree-PIiasc Commutator M otors—II lnduction-regulator Type

ARIABLE-SPEED AC motors of the commutator motor, speed variation is ob­ V commutator type are of two kinds, one tained by injecting into the secondary circuit controlled by moving the brushgear and the a voltage equal in magnitude and frequency other by an induction regulator. The former to the voltage induced in it at the desired was described in the Electrical Review o f speed. The induction regulator is a means of September 28th. The basic principles of the producing a voltage of variable magnitude induction-regulator type are generally similar, which is fed to the secondary by way of a but it has no slip-rings. The primary wind­ commutator and is converted at the brushes ing, fed from the supply, is carried on the from mains frequency to slip frequency. stator, and the secondary.., The energy supplied to the winding, on thé rotor, is con­ By K. C. Howison, stator is constant and inde­ nected to a commutator. A.M.I.E.E. pendent of the speed. When In order that the motor running at sub-synchronous may run above or below synchronous-speed speed the slip energy is returned to the the secondary winding must be supplied, as supply by way of the induction regulator. At in the case of the Schrage motor, with a synchronous speed the regulator carries, no voltage equal to that induced in it by the load whilst at hyper-synchronous speed the primary. This is done by connecting in the additional energy required is supplied by the rotor circuit ^n induction regulator, the regulator. This constant energy feature is primary of which is fed from the main supply. The induction regula­ tor is a special form of transformer having a movable secondary winding. By rotating the regulator the secon­ dary voltage is shifted in phase, thus enabling it to be vectorially added to or subtracted from the rotor volts. By employing a double induction regulator the phase shift is neutral­ ised. In addition there are two special-purpose windings. The first, a compensating winding, is carried in the stator slots; by transformer action it produces a voltage leading by 90 deg. the regulator and Fig. I.— Induction regulator controlled motor rotor voltages, thus improving the power factor. The second utilised as a means of protecting the motor. winding is of the DC type .in the rotor slo£s The torque of the induction-regulator-con­ and its purpose is to assist commutation, as trolled motor is constant at all speeds and interpoles do in a normal DC machine. settings of the regulator. The speed, which As in the case of the moving-brushgear depends upon the movement of the regulator, 4 9 6 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5

can be continuously varied without steps and but at sub-synchronous speed it will be while under load. The motor can be con­ rather low especially if the speed range is structed normally for a speed range up to ten wide. The efficiency is of a similar order to to one and for still greater ranges if desired. other AC motors with a favourable bias at The size of regulator will depend on the speed the higher speeds. range since it handles the slip kVA. Once The following notes on control and protec­ the speed is set, it remains constant for any tion apply to either type of commutator motor setting of the regulator. A small variation in except where otherwise stated. When the speed occurs, however, with fluctuations in speed range is two to one or more, even large motors may be started with a normal direct- on starter. With hand control an interlock switch is usually fitted, so that the control handwheel must be re­ turned to the mini­ mum speed position before the m otor is started. For the mov­ ing-brushgear type the handwheel is mounted on the motor endplate and moves the brushes, while on the induction regulatpr type it is carried on the regula­ tor. In either case remote control up to about 20 ft. can be by means of a chain or wire rope. In the in­ Fig. 2.— Energy flow in induction regulator controlled m otor, (a) operating at sub-synchronous, (b) at synchronous and (c) at super-synchronous speed duction-regulator type the regulator can be load. In the author’s experience, this varia­ placed away from the motor as most con­ tion is greater than it is with the moving- venient to the operator. brushgear type, but opinions differ on this Fully remote or push-button control can be point. While induction-regulator motors are nor­ mally made for one direction of rotation they can be reconnected to run in the opposite direction for reversible duty, in which event the brushes are set in the neutral axis and the compensating winding is put on a small separate transformer. Since these motors are stator fed they may be wound for high voltages. Owing to the design of their commutator windings they can be made for rather larger outputs than can the moving-brushgear type. Motors up to 1,000 HP have been built and totally enclosed motors of large output are now available. Fig. 3.—Motor with hand-operated induction r e g u la t o r (Laurence, Scott & Electromotors, Ltd.) Their power factor is dependent on the speed and at any given speed is practically arranged by fitting a fractional-horse-power constant, tending to rise with decreasing load. pilot motpr in place of the handwheel. In this At synchronous and hyper-synchronous way the main motor can be controlled from speeds the power factor may approach unity, one or more push-button stations. By means October 5, 1945 E l e c t r ic a l R e v ie w 4 9 7 of a pre-set controller it can be made to return development the production of a range below always to the same speed conditions. By 3 HP. He thanks the British Thomson- using a special two-speed pilot motor .dynamic Houston Co., Ltd.. and Laurence, Scott & braking can be provided, since if the brush­ Electromotors, Ltd., for permission to use gear is rotated to the maximum speed position photographs and data and Dr. Schwarz of at a greater rate than the main motor normally decelerates then a reverse braking torque is set up. A similar system of dy­ namic braking by DC injection can be employed in a stator-fed machine. Overload protection is by means of normal ther­ mal or magnetic overloads mounted on the control panel. When the motor is operating at constant

Fig. 4.— Motor with remote controlled pilot-motor-oper­ ated induction regulator driving Richards horizontal b o re r (Laurence, Scott & Electro ­ motors, Ltd.)

torque the horse-power is proportional to the speed and the current will in­ crease accordingly. For the stator-fed type the stator current at constant torque is roughly constant and the overloads can therefore be set to operate at over-torque conditions. In this it differs from the moving-brushgear thedatter company for assistance and sugges­ motor which is without protection at low tions regarding induction-regulator motors. speeds unless special means are adopted for this purpose, for instance, a thermal relay within the motor. Export Inquiries 1W E have received the undermentioned Cost and Applications *■ inquiries from firms and individuals overseas who wish to secure agencies for British The cost of commutator motors with electrical equipment and appliances or to control gear is considerably in excess of that import them into their territories. We shall be of a standard type of motor. In order to glad to pass on to them replies received from obtain maximum efficiency and power-factor, readers which should be addressed to the unnecessarily wide speed ranges should be Editors, quoting the number given in paren­ avoided and, when ordering, the full require­ theses. We cannot vouch for the standing of ments should be stated, as considerable inquirers and manufacturers replying to them economies can be effected by suitable choice will no doubt require the usual references:— of range and frame size. Commutator Norway.— Wholesale dealers wish to purchase motors have been successfully applied to all types of domestic materials (except cooking and heating apparatus), motors and generators, printing machines, cable machinery, mill industrial control equipment, thermostats, drives and machine tools. When a large measuring instruments, line materials and high- machine is driven by several motors they may voltage materials. (X.118.) be electrically locked together so that they Holland.—Importer wants supplies of fuses, remain in step. plugs, lampholders, accessories, metal presses, The author would suggest as a possible etc. (X.119.) 498 Et f.ctrical Review October 5 , 1 9 4 5 NEW PATENTS Electrical Specifications Recently Published

The numbers under which the specifications will be 1941. (571815.) “ Resonance spring drive for printed and abridged are given in parentheses. the remote control of electriral apparatus.” Copies of any specification f 1 .4. each) may be 19921/43. December 3rd, 1942. (571866.) obtained from the Patent Office, 25, Southampton Marconi’s Wireless Telegraph Co., Ltd.— Buildings, London, W.C.2. “ Variable permeability tuning arrangements for A KT.-GES. fiir Technische Studien.— radio or like apparatus with band-spread “ Method for the working of thermal power tuning.” 17503/43. October 24th, 1942. plants.” 9095/44. May 14th, 1943. (571938.) (571836.) “ Variable inductances.” Cognate Aktiebolaget Elektrolux.—“ Absorption re­ applications 17504/43 and 17505/43. October frigerating apparatus.” 19894/43. November 24th, 1942. (571858.) 27th, 1942. (571958.) Marconi’s Wireless Telegraph Co., Ltd., Allmanna Svenska Elektriska Aktiebolaget.— E. R. Burroughes and H. H. Lightfoot.— “ Means for regulating a machine voltage.” “ Light-current electrical switches particularly 14172/43. September 28th, 1942. (571851.) for use in radio apparatus.” 19978. November C. L. Arnold, R. W. Dowsett and M. K. 30th, 1943. (571898.) Electric, Ltd.—“ Electrical socket contacts.” Mawdsley’s, Ltd., and C. W. H. Minchin.— 20866. December 13th, 1943. (571900.) “ Dynamo-electric machines.” 638. January 12th, 1944. (571968.) Automatic Telephone & Electric Co., Ltd., H. W. M. Pook.—“ Electrically heated hair* C. Gillings and C. E. Beale.—“ Telephone or waving apparatus.” 18821. November 12th, like' systems.” 3129. February 19th, 1944. (571908.) 1943. (571894.) Premier Electric Heaters, Ltd., and H. T. British Mechanical Productions, Ltd., and Taylor.—“ Electric and other fires.” 16924. F. C. Fuke.—“ Conneetor pins for electrical October 15th, 1943. (571924.) plug and socket connections.” 20581. December 9th, 1943. (571869.) D. Rushworth.—“ Reels for holding electric cable or for like purposes.” 17398. October British Thomson-Houston Co., Ltd.—“ On­ 22nd, 1943. (571857.) load tap-changing systems for transformers.” T. Saxer.—“ Apparatus for toasting bread 20913/43. December 14th, 1942. (571871.) and other foodstuffs.” 447. January 10th. 1944. “ Transformer systems.” 4046/43. March 20th, (571903.) 1942. (571877.) “ Methods of forming intricate Scophony, Ltd., G. Wikkenhauser, P. L- F. shapes from extruded metal powder.” 11406/43. Jones and D. P. Franklin.—“ Electric induction July 14th, 1942. (571881.) motors.” 19405. November 19th, 1943. British Thomson-Houston Co., Ltd., and (571896.) A. P. Castellain.—“ Stereoscopic projection.” Siemens & General Electric Railway Signal 8764. June 1st, 1943. (571944.) “ Stereo­ Co., Ltd., and H. J. N. Riddle.—“ Generation scopic cinematography.” 8765. June 1st, 1943. of electrical pulses.” 21406. December 21st, (571945.) “ Stereoscopic projection.” 8766. 1943. (571963.) June 1st, 1943. (571946.) British Vacuum Cleaner & Engineering Co., Smart & Brown (Engineers), Ltd., and H. Sonnenfeld.—“ Electrical switches.” 214 79. Ltd., and I. G. O. Brown.—“ Unidirectiohal drive mechanism.” 13868. August 25th, 1943. December 22nd, 1943. (571964.) (571849.) Standard Telephones & Cables, Ltd.— British Vacuum Cleaner & Engineering Co., “ Visual indicators for electrical circuits.” Ltd., and W. Clark.—“ Synchronous electric 764/44. F ebruary 13th, 1943., (571970.) motors.” 13867. August 25th, 1943. (571848.) Standard Telephones & Cables, Ltd., F. Brush Development Co.—“ Piezoelectric Fairley and A. C. Delamare.—“ Tools for transducers.” 526/44. January 11th, 1943. removing insulation from electric conductors.” (571904.) 4120. March 6th, 1944. (571875.) E. L. W. Byrne (Titeflex Metal Hose Co.).— Stora Kopparbergs Bergslags Aktiebolag.— “ Conduit clamp.” 15209. September 16th, “ Electrically heated gas producers.” 4515/43. 1943. (571854.) June 13th, 1942. (571878.) Dorman & Smith, Ltd., T. Atherton and Taylor Electrical Instruments, Ltd., and D. J. Lund.—“ Sockets for electric plugs.” 513. Rich.—“ Electric multiple switches.” 20267. January 11th, 1944. (571839.) December 3rd, 1943. (571960.) E. Frank.—“ Electrical socket contacts.” Telegraph Construction & Maintenance Co., 21016. December 15th, 1943. (571838.) Ltd., and H. F. Wilson.—“ Process for the Hoover, Ltd., A. W. White and R. J. Gilson.— preparation of polymerised hydrocarbons in “ Dynamo-electric machines.” 21581. December powder form.” 3524. March 17th, 1942. 24th, 1943. (571965.) (571814.) R. Illingworth.—“ Kitchen units.” 20006. Westinghouse Electric International Co.— November 30th, 1943. (571899.) “ Inductive heating apparatus.” 17295/43. Johnson & Phillips, Ltd., and C. J. H. Stevens. October 31 st, 1942. (571887.) —“ Electrical insulators.” 19004. November H. Wood & Co., Ltd., and A. Hayes.— 15th, 1943. (571930.) “ Cable plug connection.” 16887. October 14th, O. K. Kolb.—“ Unidirectional microphones.” 1943. (571835.) 20688. December 10th, 1943. (571870.) E. Wright.—“ Thermally operated electric Landis & Gyr. Soc. Anon.—“ Maximum switch suitable for fire detection.” 20057. demand meters.” 15692/42. November 20th, December 1st, 1943. (571959.) October 5 , 1 9 4 5 E l e c t r i c a l R e v ie w 4 9 9 CONTRACT INFORMATION Accepted Tenders and Prospective Electrical Work Hammersmith.—Electricity Committee. Re­ Contracts Open commended. Transformers (£2,514).—Bonar “ rfm ■ ,0°ntr_acts Open " are advertised in our Long & Co. UJjicial Notices ' section the date of the issue St. Pancras.—Contracts and Libraries Com­ is given in parentheses. mittee. Accepted. L.v. switchgear, Tavistock Australia.— Victorian State Electricity Com- Place substation (£845).—English Electric Co. mission. October 10 thv One or alternatively E.h.v. switchgear, Arlington Road substation two 30,000-kW steam turbo-generators, com­ (£8,155).—G.E.C. Single-phase meters.— plete with condensing plant, pipework and Chamberlain & Hookham (250 25-A at £1 accessories, for Newport C ” power house. 15s. 3d. each and 125 50-A at £2 2s. 6d. each); Specs, at Agent-General’s office, London. Ferranti (400 25-A at £1 15s. 3d. each and 100 Also two (alternatively four) water-tube boilers 50-A at £2 2s. 6d. each). with auxiliaries (Spec. 45-46/4). Newcastle-on-Tyne.—City Council. Accepted. October 24th. 66-kV and 22-kV outdoor Two 300-kVA transformers (£526).—Yorkshire switchgear and accessories (Spec. 45-46/13). Electric Transformer Co. Rockhampton City Council. October 20th. One 5,000-kW turbo-alternator. Stockton.—Corporation. Accepted. Laying Melbourne and Metropolitan Tramways of cables from Thompson Street to the Albany Board. November 5th. Pumpless rectifier Road Estate.—Edison Swan Cables. equipment. Tender 1351, Controller of Stores. Eire.—January 28th. Electricity Supply Contracts in Prospect Board. Elydro-electric generating plant at Particulars o f new works and building schemes for Cathaleen’s Fall and Cliff stations on the River the use of electrical installation contractors and Erne. (September 28th.) traders. Publication in this section is no guarantee Hackney.— October 26th. Electricity Depart­ that electrical work is definitely included. Alleged ment. Six 500-kVA transformers. (See this inaccuracies should be reported to the Editors. issue.) Cheshire.—Primary school at Lower Bred- Manchester.—October 26th. Electricity Com­ bury; E. M. Parkes, county architect, The mittee. Ventilating plant for No. 2 boiler Castle, Chester. house, etc., Stuart Street generating station. Clay Cross.—Permanent houses (30), Stretton (See this issue.) Road estate, for U.D.C.; W. A. Evans, builder, Calow, Chesterfield. Redcar.— O ctober 6th. Town Council. Cable laying, etc. (September 21st.) Coventry.—Junior and infants’ school, Rad­ ford school site; D. E. E. Gibson, city architect, Scotland.— N ovem ber 6th. North of Scotland Hydro-Electric Board. 11-kV distribution la, Warwick Row. lines, Morar area, Inverness-shire. (See this Cowdenbeath.—Houses (100), with electrical issue.) work; J. Muir, joint town clerk, Town House. Sheffield.— November 5th. Electricity Com­ Cumberland.—Staff quarters, Penrith Institu­ mittee. 20-MVA, 33/11-kV transformer. (See tion; Jas. Leslie & Sons, builders, Coach Road, this issue.) Whitehaven. Woolwich.—October 9th. Electricity Depart­ Dearham (Cumberland).—Houses (40) for the ment. One 750-kW Diesel alternator and four North Eastern Housing Association; P. L. 30-MVA outdoor reactors. (August 31st.) Browne, Son & Harding, architects, Pearl Buildings, Newcastle-on-Tyne. Dudley.—Police houses (30), various sites; Orders Placed borough engineer. Bedford.—Electricity Committee. Accepted. Easington.—Houses (522) on eight sites for 11-kV switchboard with ancillary apparatus the R.D.C.; surveyor, Council Offices. (£11,850). — A. Reyrolle & Co. Batteries Exeter.—Houses (176), Wonford estate; city (£795).—Chloride Electrical Storage Co. architect. Fulham.—Electricity Committee. Accepted. Farnborough (Hants).—Houses (100), Hawley Two 500-kVA transformers (£2,277).—British .Lane; I. C. Jenkins, surveyor, Town Hall. Electric Transformer Co., Ltd. 6-kV isolator equipment (£253).—Ferguson, Pailin, Ltd. Fulham.—Reconstruction, Wyfold Road flats Three-phase, four-wire board (£942).—W. Lucy (£12,670); borough engineer. & Co. Gateshead-on-Tyne. — Factory for Harris Glasgow.—Electricity Committee. Accepted. Gowns, Ltd., on the Team Valley Trading Transformers : Six 200-kVA and four 400- Estate; J. H. Natter, 36,, Eldon Place, New­ kVA t£l 576)—British Electric Transformer castle-on-Tyne. Co ■ eight 400-kVA (£3,152) and six 800-kVA Factory for Sigmund Pumps, Ltd., Team (£4 260) Bruce Peebles & Co. Valley; York, Rosenberg & Mardall, 35, Corporation Sub-Committee on Lighting. Welbeck Street, London. Accepted. 500 lanterns for electric lamps Glasgow.-Extensions lo Mitchell Library (£2,475).- -Revo Electric Co. (£36,000); city engineer. Hacknev.—Electricity Committee. Accepted. Grimsby. — School, Yarborough Road; Air h e a t e r (£3,863).—International Combustion. borough engineer. 5 0 0 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5

Hanley.—Additions to premises, Couldon Place (£50,000), for craft training school; Municipal Reports governors of North Staffs Technical College, West Ham Victoria Road, Stoke-on-Trent. rB^HE total war damage claim of the West Ipswich.— Houses (174), W hitton ; E. M ac- Laughlan, borough surveyor, Town Hall. Ham Electricity Department now amounts to £500,000, of which £135,000 has already been Islington.—Flats (132), Canonbury estate; paid as part of the cost of essential repairs Harry Monson, architect. carried out. The engineer and manager, Mr. Leeds.— Completion of new central block at J. W. J. Townley, in his report for 1944-45, University; University Senate. says that during the year further damage Lewisham.—Flats, 1, Dartmouth Terrace; was suffered due to flying and rocket bomb Wellington Developments, Ltd. attacks, the most serious incidents occurring in Lowestoft. — Factory, St. Johns Road; July when there were two direct hits on the Jeckells & Sons, Ltd. head office and depot in almost precisely the Midlothian.—Houses (20), with electrical same spot. Some 118 ft. in length of the main work, Ratho Village and Kirknewton; county clerk, County Rooms, George IV Bridge, building, the main stores with a large part of Edinburgh, 1. the stock and outbuildings, were completely Millom.—Houses (20), for R.D.C.; J. Hankey, destroyed. The destruction included the trans­ surveyor, Council Offices, Market Square. former station, meter test department and general workshops, with nearly all their valuable Mitford and Launditch.—Houses (36), several parishes, for R.D.C.; W. J. Barton, clerk, The equipm ent. Guildhall, East Dereham. Since the commencement of enemy air attacks Morecambe.—Houses (38), Hestham Hill; nearly 12,000 services have been disconnected borough engineer. from badly damaged or destroyed premises, Newbury.—Houses (31), Doveton Way; 2.000 during the past year. Nevertheless total borough engineer. sales of electricity increased during the year Newcastle-on-Tyne.—Additions to Woolsing- from 135-2 million to 136-5 million kWh, ton Airport; city engineer, Town Hall. although this was still 20-5 million kWh less Houses (87) Newton Park estate; Wilkinson than in 1939-40. Gross revenue (including Brothers, builders, Pillars Yard, High Street, sales department) was £785,908 (£754,431) with G ateshead. working expenses of £618,839 (£568,551) and Rochdale.—Houses, The Greave (50), and there was a net profit of £5,202 (£15,977). The Turf Hill (20) for Corporation; G. & J. Seddon, average price obtained per kWh sold increased Ltd., builders, 3, Manchester Road West, from 1 -18d. to l- 2 2 d. Little Hulton, near Bolton. A draft scheme for the construction of what Saffron Walden.— H ouses (66), A shdon R o ad ; is substantially a new generating station was H. C. Stacey, town clerk, Municipal Offices. submitted to the C.E.B. early in the year and a South Shields.— Houses (22), to cost £1,200 further direction was issued for the installation egch; J. W. Ridley, St. Mary’s Avenue. of a 30,000-kW set and boiler plant; with the Stoke-on-Trent.— Extensions and new nurses’ set covered by a direction issued in 1943 this home. Orthopaedic Hospital, Hartshill; secre­ will form one third of the ultimate capacity of tary, North Staffs Cripples’ Aid Society. 180.000 kW. Last year 111-6 million kWh was Sunderland. — Seven community centres; generated by the Department compared with borough engineer. 98-0 million kWh in 1943-44. Swansea. — Development, trading estate, Fforestfach; Slough Estates, Ltd. Maidenhead Factory, Pontardulais Road; Smiths Potato The borough electrical engineer of Maiden­ Crisps, Ltd. head, Mr. C. A. Britton (who is leaving to take Wellingborough.— Houses (40), Neilson estate ; up a post with the Sudan Light & Power Co., R. Kilby, surveyor, Council Offices, Swanspool. Ltd.), reviews the future outlook of the under­ W ick.— Houses (42), with electrical work; taking in his report for 1944-45. He points J. R. Ballantyne, surveyor, 112, Bath Street, Glasgow. out that there is a wide field for development; there are still 2,143 premises without electric Wigan.— Church, Sunday Schools and care­ taker’s flat (£8,000); secretary, Gidlow Methodist service and the use of electricity for space Church, Gidlow, Wigan. heating, water heating and cooking is well Willenhall.— Houses (34), Portobello and below that in some other parts of the country. Monmore Lane sites, for U.D.C.; surveyor, The establishment of offices and modern show­ Council Offices. rooms in the business centre of the town should Worksop. — Rehabilitation centre, Firbeck be considered as soon as is opportune. Hall (£30,000); Miners' Welfare Commission, Total income lasl year was £103,532 (£87,984) Ashley Court, Ashtead, Surrey. and working expenses amounted to £85,553 Worthing. Houses (25), Meadow Road site; (£75,404), there being a net profit of £8,625 borough engineer, Town Hall. (£2,331). A total of 15-8 (130) million kWh W ymondham. Houses (£17,262), SiItielci was sold at an average price of 1 -460d. (I -530d.), estate, for U.D.C.; R. G. Carter, Ltd., builders, with costs amounting to 1-369d. (l-530d.) per Drayton, Norwich. kW h sold. October 5, 1945 E l e c t r ic a l R e v ie w 4 3

“ 01 tell* 1 now amoiiQ “Sakai, w

^ ^inager, on for 1% r«"W 4»; ienis «4

»large pm. ‘ coapb

isnanyainiuj ®w disconaaa ^troysd prejaj ifewiletem 1 dnrisg ile u a Spire fr5 nioi Bi mffionffli Nut loose. A Spire fixing wane Ikta 08 (£754,431) i;' locks itself. Whatever the 39 W5l)a assembly there’s a good chance 02 (£15^77). 5 Wl sold moKt that the job can be done better and quicker by Spire. Send us istnaion of i; rating station n examples of your assemblies ; :iB the rat ¡a, parts or drawings. In about a for the dsuUe er plant: «ilia fortnight we’ll show you how you akiilMIo iMateapiffi: could do the job the Spire way —per­ haps with Spire Nuts or Clips ; perhaps at compared E by re-designing your components so that t the Spire device is part of them — in which laneer of Mse case you won’t need nuts at all. o is ¿tint to®

loot of tie oK' TH A T’S Fixed TH AT! 4H5. He poc ! for Mop«'- This is a typical case of intelligent use of niihoil el® Spire fixing. This was originally a spring 5 clamp which was screwed to its base with etriap fit tot- screw , washer and nut. N ow the clamp is cootiit i * redesigned to incorporate its own Spire fixing, and the nut and washer [BO have disappeared. Apart from ad i the saving in m aterial, it is a if the to»"*' much quicker and simpler assembly job, the clamp is iportioi- ‘ zipped ’ on to the screw and :m532(£*7,w tightened firmly home. De­ utei to ®;; signed as a fuse holder this # A BETTER fixing NS 1307 is suitable also proil of ®" for securing any cable, rod or 01 million w a y o f f i x i n g circular equipment from |in. to — M ,n- diameter. (i m i i* Simmonds Aerocessories Limited ■ Great West Road • London ■ A Company o f the Simmonds Group 44 Electrical Review October 5, 1945

INFRA-RED LAMP HEATING

. . . to your heat treatment plant as required.

G.E.C. Infra-Red Lamp Heating Plant is very flexible in its • application. Additional units may be readily added as production increases providing adequate heat treatment as it is required in the production line. Plant may be employed in large units on conveyor lines or small sections may be placed alongside individual machines. Write for a copy of publication No. HO. 9687 giving full details of G.E.C. Infra-Red Lamp Heating.

THE GENERAL ELECTRIC CO. LTD.. Magnet House, Kingswav, London, VV.C.2.

SAVES TIME — S October 5, 194 5 E l e c t r ic a l R e v ie w 45 •CLASSIFIED ADVERTISEMENTS- ADVERTISEMENTS for insertion in the following REPLIES TO advertisements published under a Friday s issue are accepted up to First Post on Box Number if not to be delivered to any particular M onday, at Dorset House, Stamford Street, London, firm or individual should be accompanied by instruc­ tions to this effect, addressed to the Manager of the THE CHARGE for advertisements in this section ELECTRICAL REVIEW. Letters of applicants in is 2/- per line (approx. 7 words) per insertion, such cases cannot be returned to them. The name minimum 2 lines 4/-, or for display advertisements of an advertiser using a Box Number will not be 30/- per mch, with a minimum of one inch. Where disclosed. All replies to Box Numbers should be the advertisement includes a Box Number there is addressed to the Box Number in the advertisement, an additional charge of 6d. for postage of replies. c/o ELECTRICAL REVIEW, Dorset House, Stam­ SITUATIONS WANTED^- Three insertions ford Street, London, S.E.l. Cheques and Postal under this heading can be obtained for the price of Orders should be made payable to ELECTRICAL two if ordered and prepaid with the first insertion. REVIEW LTD. and crossed. Original testimonials should not be sent with applications for employment.

OFFICIAL NOTICES, NORTH OF SCOTLAND HYDRO-ELECTRIC BOARD TENDERS, ETC. Distribution Scheme No. 2

SHEFFIELD CORPORATION 11,000-volt Overhead Lines (Wood Pole) in Morar Area, Inverness-shire Electricity Department npHE North of Scotland Hydro-Electric Board invite -1- tenders for the supply, delivery and erection of 1 1 .000- Contract No. 706— Transformer volt Distribution Lines. Copies of the specification and form of tender may be obtained from the Offices of the Board on application to TpHE Electricity Committee are prepared to receive the undersigned on or after 6th October. 1945, on pay­ tenders for the supply and delivery of the under­ ment of a deposit of Two Guineas for the first copy and mentioned Transformer: — One Guinea for each subsequent copy. Sums paid for One 20-MVA, 33/11-kV, 3-phase, Double Wound. any number of copies up to three will be refunded on Self Cooled. receipt of a bona fide tender. Contractors desiring to submit tenders may obtain Tenders, on the form supplied, must be delivered to specification and form of tender at this office on making the Offices of the Board not later than 6th November, a deposit of £2 2s., which sum will be refunded on receipt 1945. The B’oard do not bind themselves to accept the of a bona fide tender. To meet the convenience of con­ lowest or any tender. tractors, two copies of the specification will be furnished; T. LAW RIE. additional copies may be purchased at a cost of £1 Is. 16, Rothesay Terrace, Secretary. per copy. Edinburgh, 3. Any person or firm sending in a tender will be required 1st October. 1945. 2974 to comply with the Standing Orders of the Council re­ lating to the “ Prevention of Corruption ” and to the standard rates of wages and proper hours and conditions CITY OF M A N C H ESTER of labour. A print of the Standing Orders may be obtained from the Department. HE Electricity Committee invites tenders for the The tender and accompanying documents, filled up as T supply, delivery and erection of VENTILATING directed, must be enclosed in the official envelope supplied PLANTS FOR No. 2 BOILER HOUSE. ETC.. STUART with the specification, which shall not bear any name or STREET GENERATING STATION (Specification No. mark indicating the sender, to be delivered to the Town 839). Clerk. Town Hall. Sheffield, 1. not later than the first Specification, etc.. may be obtained from Mr. R. A. S. post on Monday, 5th November. 1945. Tenders received Thwaites, Chief Engineer and Manager, Electricity Depart­ after the time stipulated herein will not be considered. ment. Town Hall, Manchester. 2. on payment of a fee The Committee do not bind themselves to accept the of one guinea, which amount will be refunded on receipt lowest or any tender. of a bona fide tender. JOHN R. STRUTHERS. Tenders, duly endorsed and addressed to the Chairman Commercial Street. General Manager and Engineer. of the Electricity Committee, to be delivered not later Sheffield. 1. than 10 o’clock a.m. on-Friday, 26th October, 1945. September. 1945. 2975 PHILIP B. DINGLE. Town Hall, Manchester. 2. Town Clerk. 29th September. 1945. 2981 METROPOLITAN BOROUGH OF HACKNEY

Electricity Department • SITUATIONS VACANT______None of the vacancies lor women advertised in these m H E Borough Council invite tenders for the supply and columns relates to a woman between 18 and 40 unless such -L delivery of SEX 500-kVA TRANSFORMER.S. Copies woman (a) has living with her a child of hers under the of the specification may be obtained on application to age of 14, or (6) is registered under the Blind Persons Acts, the Borough Electrical Engineer. 18/24. Lower Clapton or («) has a Ministry of Labour permit to allow her to obtain employment by individual effort. Tenders 'to be submitted in envelopes (supplied by the Borough Council and clearly endorsed), sealed with sealing THE BRITISH ELECTRICAL AND ALLIED wax, must be delivered by the persons tendering or by INDUSTRIES RESEARCH ASSOCIATION their authorised representative to the Chairman at a special meeting of the Establishment and General Pur­ FT1HE Council of the above Association seek applications poses Committee to be held at the Town Hall, Mare Street. for the position of Director from those who have had Harknev E 8 at 6.30 p.m. on Friday, the 26th October. experience in electrical research, preferably from those 19^5 or'sent by registered post addressed to the Chair- who in addition have had some contact with the electrical man of the Committee, so as to be dehvered not later supply and manufacturing industries. Age preferably not than the above-mentioned date and time. exceeding 50 years. Commencing salary £2.500 per annum T e n d e r s delivered or sent otherwise will not be con­ with superannuation (F.S.S.U.). It is desirable that the sidered The Council do not bind themselves to accept successful candidate should be able to take over early in the lowest or any tender. the new year, or sooner if possible. Applications with DUDLEY SORRELL. supporting particulars, which should be received not later _ „ „ Town Clerk. than Friday. 16th November. 1945, should be sent under Town Hall. personal cover to the Chairman of the Council. Hackney. E.8. 2g30 B.E.A .I.R.A ., 15. Savoy Street, London, W.C.2. 2972 September. 1945. 46 E l e c t r i c a l R e v ie w October 5 , 1 945

BOROUGH OF MAIDENHEAD MID-LINCOLNSHIRE ELECTRIC SUPPLY CO. LTD.

Appointment of Borough Electrical Engineer A PPLICATIONS are invited for the following appoint- m e n ts: — PPLICATIONS are invited for the appointment of A Borough Electrical Engineer from Corporate Mem­ ASSISTANT CONSUMERS’ ENGINEER. Appli­ bers of the Institution of Electrical Engineers experienced cants should give their experience in the following in the management and administration of an electricity branches of supply work : (1) Preparation of specifica­ undertaking. tions and estimates for wiring; (2) Installation work on Salary for the position will be in accordance with the consumers’ premises; (3) Consumers’ department organi­ agreement dated 9th July, 1941, made by the National sation; (4) Rural, industrial and domestic load develop­ Joint Committee of Local Authorities and Chief Electrical ment. Salary commencing £400 per annum, plus a Engineers, and in accordance with the agreement the temporary war bonus, at present £65 8s. per annum. salary for the first year will be 85% of the full salary and TWO JUNIOR MAINS ASSISTANTS. Applicants for the second year 92£% thereof, the full salary being must have had experience in the operation of a high payable for the third and subsequent years. The full voltage system and be conversant with the erection and approximate salary for the financial year ending 31st maintenance of E.H.T. and L.T. overhead lines, under­ March. 1946, would be £932. In addition, a temporary ground cable and transforming substations. Salary cost of living bonus is payable. commencing £225 per annum, plus a temporary war The appointment will be determinable by three months’ bonus, at present £62 8s. per annum. notice on either side and will be subject to the provisions of the Local Government Superannuation Act, 1937, and The successful candidates will be required to participate the successful candidate will be required to pass a medical in the Company’s Superannuation Scheme. examination. Applications, appropriately endorsed, should give age, Applications, on forms to be obtained from the under­ education, details of training, experience and qualifications signed, must be received not later than 12th October, and be accompanied by copies of recent testimonials, and 1945. should be addressed to the undersigned not later than the Canvassing, directly or indirectly, will be a disquali­ 26th October, 1945. fication. The Ministry of Labour and National Service, Technical The Ministry of Labour and National Service, Technical and Scientific Register, have given permission under the and Scientific Register, have given permission under the Control of Engagement Order, 1945, for the advertisement Control of Engagement Order, 1945, for the advertise­ of these vacancies. ment of this vacancy. N. F. MARSH. M.A., M.I.E.E.. J. A. BAIRD. Engineer and Manager. Guildhall, Maidenhead. Town Clerk. Mid-Lincolnshire Electric Supply Co. Ltd., September, 1945. 2875 North House, Grantham, Lincs. 2976

CITY OF LINCOLN CITY OF EXETER

Electricity Department Electricity Department

Appointment of Power Station Superintendent Appointment of Relief Charge Engineer

PPLICATIONS are invited for the above appointment PPLICATIONS are invited for the above appointment A at the Corporation’s St. Swithin's Generating Station. A at a salary in accordance with Class F. Grade 8a. Candidates should be qualified Engineers with experience of the National Joint B’oard Schedule, at present amount­ in the operation and maintenance of a Selected Generating ing to £371 per annum. Station. Candidates must have received a sound technical train­ The present salary will be in accordance with Grade 3. ing and be experienced in the operation of a modern Class F. of the National Joint Board Schedule (£583 to Selected Generating Station. £608), with prospects of higher reclassification on the Corporate membership of the Institution of Electrical completion of extensions now in progress. Engineers would be an advantage. The appointment will be subject to the provisions of Applications, stating age, particulars of general educa­ the Local Government Superannuation Act, and the tion, technical training and experience, accompanied by successful candidate will be required to pass a medical copies of diplomas (if any) and two recent testimonials, examination. should reach the undersigned by not later than October Applications, stating age. particulars of education, 12th, 1945. training and experience, accompanied by copies of not The successful candidate will be required to pass a more than three testimonials, endorsed “ Station Super­ medical examination. intendent,” should be addressed to The Electrical Engi­ The Ministry of Labour and National Service (Technical neer and Manager, Electricity Department, Brayford Side and Scientific Register) have given permission under the North, Lincoln, and received not later than Saturday, the Control of Engagement Order, 1945, for the advertisement 13th October, 1945. of this vacancy. J. H. SMITH. A. L. KEET. M.Eng., M.I.E.E.. Corporation Offices, Town Clerk. H ead Offices, City Electrical Engineer. Lincoln. 39/40. North Street. Exeter . 22nd September, 1945. 2910 September, 1945. 2988

WEST MIDLANDS JOINT ELECTRICITY THE SALCOMBE GAS & ELECTRICITY CO. LTD. AUTHORITY Appointment of Assistant Distribution Engineer Appointment of Temporary Civil Engineering and Ferro-Concrete Designers PPLICATIONS are invited for the above position A from qualified electrical engineers who must have rpiHE above-named Authority desire to appoint two experience in the laying, jointing, testing and main­ -A- Temporary Civil Engineering Designers and two tenance of 3-phase High Tension and Low Tension Cables, Ferro-Concrete Designers in connection with the design maintenance and operation of static substations (indoor and layout of important generating station extensions. and outdoor types), erection and maintenance of E.H.T. Applicants must have had wide experience in similar and L.T. overhead lines and keeping the necessary records work and must be Corporate Members of the Institution in connection with the above. Single man preferred. of Civil Engineers or possess equivalent qualification. Salary £312 per annum. The salary will be £12 per week. Applications MUST be accompanied by an intimation Applications must be made on the prescribed form, of release by the present employer in case of success. which may be obtained from the address below. Applications, giving full details of age. training and The Ministry of Labour and National Service have given experience, and endorsed " Assistant Distribution Engi­ permission under the Control of Engagement Order. 1945. neer.” should be forwarded not later than October 19th for the advertisement of these vacancies. to The Salcombe Gas & Electricity Company Limited. H. F. CARPENTER. 37. Alexandra Road. Epsom. Phoenix Buildings. Clerk and Manager. The Ministry of Labour and National Service have Dudley Road, Wolverhampton. given permission under the Control of Engagement Order. 27th September, 1945. 2984 1945. for the advertisem ent of this vacancy. 2923 5 , 1 945 October E l e c t r i c a l R e v ie w 47

COUNTY BOROUGH OF IPSWICH COUNTY BOROUGH OF BIRKENHEAD

Electric Supply and Transport Departments Electricity Department

Appointment of Deputy Chiel Electricity and Appointment of Meter Superintendent (Temporary) Transport Engineer A PPLICATIONS are invited for the above position at A PPLICATIONS are invited for the position of Deputy a salary in accordance with the N.J.B. Schedule, Chief Engineer to the Borough Electrical Engineer and Class H, Grade 6, commencing at £517 per annum. Transport Manager at a commencing salary of £900 p.a., Candidates must possess technical qualifications at least rising by annual increments of £50 to £1.000 p.a., plus war equal to the standard of the Associate Membership of the bonus. A car allowance will be granted. The appointment Institution of Electrical Engineers, and should preferably will be subject to the provisions of the Local Government be Corporate Members of the above Institution, and have Superannuation Act. 1937. and the successful candidate had a sound general education and technical training in will be required to undergo a medical examination. Electrical Engineering. The person appointed must be Candidates shall be corporate members of the Institu­ thoroughly acquainted with the working of a modern tion of Electrical Engineers, having undergone a sound meter testing station and will be required to superintend mechanical and electrical engineering training, and must the repair, recalibration and testing of all types of A.C. possess extensive practical experience and organising and D.C. meters, prepayment and maximum demand ability both in the control of the departments’ staff and equipment. A thorough knowledge and experience of in drawing up and putting into effect schemes of exten­ electricity supply tariffs and metering and the routine sions and reorganisation of a fairly extensive distribution work of a meter department is necessary. system within the borough, rural districts and to bulk The appointment is subject to the Local Government supply takers, employing 33-kV. 11-kV. 6.6-kV and .4-kV Superannuation Act, 1937, and the successful candidate networks, and associated substations and switchgear. will be required to pass a medical examination. The successful candidate will also be required to generally Applications, stating age, present appointment and assist in the operation and management of a Trolleybus salary and details of qualifications and experience, together Undertaking, together with the development of the sales with copies of not more than three recent testimonials, organisation of the Electricity Undertaking. He will be should be addressed to the Borough Electrical Engineer, required to prepare technical reports and specifications in Craven Street. Birkenhead, and must be sent in not later connection with all works associated with the distribution than 23rd October, 1945, endorsed “ Meter Superintendent.” of electricity in a fairly large area, and to be competent The Ministry of Labour and National Service (Technical to advise and assist consumers on schemes of electrifica­ and Scientific Register) have given permission under the tion and generally assist in the development of the under­ Control of Engagement Order, 1945, for the advertisement taking in each of its aspects. The appointm ent will be of this vacancy. determinable by three months’ notice. Canvassing, directly or indirectly, will disqualify. Applications, stating age. details of training and ex­ E. W. TAME. perience. together with technical qualifications, should be Town Hall, Birkenhead. Town Clerk. submitted to the undersigned, with recent testimonials, 20th September. 1945. 2959 not later than Thursday, 18th October. 1945. Canvassing in any form will disqualify. G. A. VOWLES. M.I.E.E., M.I.Mech.E.. CENTRAL SUSSEX ELECTRICITY LIMITED AND Borough Electrical Engineer and ASSOCIATED COMPANIES Russell House. Transport Manager. Russell Road, Ipswich. Appointment of Chief Assistant Engineer 27th September, 1945. 2942 A PPLICATIONS are invited for the above position at a salary of £800 per annum, inclusive of war METROPOLITAN BOROUGH OF WOOLWICH allowance. Candidates, having high technical ability and wide Electricity Department experience in electricity supply, must be competent to prepare and carry out schemes for 33-kV. 11-kV and L.T. PPLICATIONS are invited for the appointment of underground and overhead extensions, and assume general A Assistant Engineer for Control Room duties at the responsibility for the efficient operation and maintenance Woolwich Power Station. Candidates not over 45 years of a network having 600 miles of mains and 400 sub­ of age should have had previous experience in a similar stations and all the necessary switchgear supplying position, must have first-class technical qualifications and approximately 20.000 consumers. Administrative experi­ sound practical experience in the operation of a modern ence and a sound knowledge of correspondence and office power station. routine on the engineering side of an Electricity Supply The salary will be in accordance with Grade 9. Class J. Undertaking is essential. of the National Joint Board Schedule, at present £401 2s. The Ministry of Labour and National Service (Technical per annum. . . . and Scientific Register) have given permission under the The appointment will be subject to the provisions of Control of Engagement Order, 1945, for the advertisement the Local Government Superannuation Act. 1937, and the of this vacancy. successful candidate will be required to pass a satisfactory Applications, endorsed “ Chief Assistant Engineer ” and medical examination. giving details of qualifications and experience, together Applications, stating age. qualifications and experience, with copies of testimonials or references, should reach the together with not more than three testimonials, should be undersigned not later than Saturday, 27th October. 1945. addressed to the Borough Electrical Engineer, Electric 'House. Powis Street, Woolwich, S.E.18. to reach him not H. DIXON. later than Saturday. 20th October, 1945 Electra House. Engineer and Manager. Canvassing members of the Council, directly or in­ Haywards Heath, Sussex. 2968' directly. will be a disqualification. DAVID JENKINS. ROYAL TECHNICAL COLLEGE, SALFORD Town Hall. Woolwich. Town Clerk. (Principal: J. E. R ic h a r d s o n , Ph.D., B.Eng., September, 1945. 2989 M.I.E.E., A.M.I.Mech.E.) PPLICATIONS are invited for the post of full-time A Lecturer in Electrical Engineering, to commence WEST MIDLANDS JOINT ELECTRICITY duties on 1st December, 1945. AUTHORITY Applicants must have had industrial experience and be capable of teaching Design of Electrical Machinery up to PPLICATIONS are invited for the position of Assistant the Higher National and London University Final B.Sc. A iMqlpi in the Development Department of the West degree standard, together with at least one other advanced M i d l a n d s Joint Electricity Authority Wolverhampton. electrical subject. Salary in accordance with the new ThP nrmnintment will be subject to the Authority s Super- Burnham Technical Scale. Scheme under the Local Government Super- Application forms and further particulars may be Art 1937 and the selected candidate will have obtained from the Principal. Royal Technical College. torass " medical examination. Applicants should have Salford, 5. to whom applications should be returned not later than 15th October, 1945. had experience olui commercial organisation sales deveiopment in an electricity m urban supply ngFuil particuiars of education, past ex- H. H. TOMSON. and rural areas. reauired to the Manager. Phoenix Clerk to the Governors. Sm ngsaDudleyRoadq Wolverhampton. 2967 2962 4 8 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5

CITY OF MANCHESTER METROPOLITAN BOROUGH OF FULHAM

Electricity Department Electricity Department

PPLICATIONS are invited for appointments on the Power Station Assistant Engineer A staff of the Constructional Section of the Electricity Department for:— A PPLICATIONS in writing are invited for the above ONE ELECTRICAL ENGINEER. post, the duties of which are those of First Assistant ONE MECHANICAL ENGINEER. to the Power Station Superintendent and cover both ONE ELECTRICAL DRAUGHTSMAN. Operation and Maintenance. TWO MECHANICAL DRAUGHTSMEN. Essential qualifications for the position are:— The work is in connection with the design and layout, etc., of Generating Stations and other supply system (a) Full experience in the operation of Turbo-Alterna­ developments. tors. Steam Raising Plant and 66-kV SwitcH- The Ministry of Labour and National Service, Technical •gear associated with a modern Base Load Power and Scientific Register, has given permission under the Station. Control of Engagement Order. 1945, for the advertising (b) Considerable technical and practical experience in of these vacancies. the maintenance of similar types of plant. (c) Experience of and aptitude for organisation and The appointments will be subject to the City Council’s planning. Superannuation Scheme, and the successful applicants will be required to pass a medical examination. (d) Proved leadership of staff and men. Salaries will be in accordance with the experience and (e) Sound technical education and training. qualifications of the candidates. Applications, giving full particulars of technical training Candidates should preferably hold a B.Sc. degree or and experience, age and salary, together with copies of equivalent. It is not essential that a candidate should recent testimonials, must be endorsed “ Technical Appoint­ now be employed at a Generating Station. ment.’’ and addressed to Mr. R. A. S. Thwaites. Chief Commencing salary. Class L. Grade 5. £717 3s. per Engineer and Manager, Electricity Department. Town annum. It is anticipated that the station will be re­ Hall. Manchester, 2. not later than 10 o’clock a.m. on classified in 1947 to Class M, when the commencing salary Friday. 19th October, 1945. would be £769 13s. Canvassing, directly or indirectly, will disqualify. Further particulars and a form of application will be for­ warded on receipt of stamped addressed foolscap envelope. P H IL IP B. DINGLE. Applications, endorsed “ Power Station Assistant Engi­ Town Hall, Town Clerk. neer,” must be received not later than noon on Monday. M anchester, 2. 15th October, 1945. September, 1945. 2954 CYRIL F. THATCHER, Town Hall. Town Clerk. COUNTY BOROUGH OF OLDHAM Fulham, S.W.6. 26th September. 1945. 2955 Electricity Department BOROUGH OF E A L IN G A PPLICATIONS are invited for the position of Junior Charge Engineer. Applicants must have had sound theoretical training and practical experience. Salary in Appointment of Junior Mains Assistant accordance with N.J.B. Schedule. Class H. Grade 9. The appointment will be subject to the provisions of A PPLICATIONS are invited for the above position the Local Government Superannuation Act. 1937, and the from candidates with a sound technical education successful applicant will be required to pass a medical and practical experience in the Mains Department of a* examination. Subject to the place of residence not inter­ Electricity Undertaking. Preference wifi be given to fering with the due performance of the duties, he will be candidates with technical qualifications, e.g., Higher at liberty to reside within ten miles of the Town Hall. National Certificate. Oldham. Canvassing will be a disqualification. The salary will be in accordance with N.J.B. Schedule. Applications, endorsed “ Junior Charge Engineer,” Class F. Grade 9a. stating age. full details of education, training and experi­ The appointment will be on twelve months’ proba­ ence, with copies of not more than three testimonials, to tionary service and will be subject to the Local Govern­ be forwarded to the Chief Engineer and Manager. Corpora­ ment and Other Officers Superannuation Act. 1937. and tion Electricity D epartm ent. Greenhill Offices, Oldham, the successful candidate will be required to pass a medical not later than Monday, the 15th October, 1945. examination. The Ministry of Labour and National Service. Technical A house belonging to the Department will be available. and Scientific Register, have given permission under the Applications, endorsed “ Junior Mains Assistant,” giving Control of Engagement Order. 1945, for the advertisement age. details of education, training, positions held, present of this vacancy. position and salary, and notice required, together with THOMAS ALKER. eopies of not more than three recent testimonials, should Town Hall. Oldham. Town Clerk. be sent to me not later than noon on Wednesday, October 4th October. 1945.-______2961 17th, 1945. The Ministry of Labour and National Service have COUNTY BOROUGH OF CROYDON given permission under the Control of Engagement Order. 1945. for the advertising of this vacancy. Electricity Department RONALD BERT. Electricity House, Borough Electrical Engineer Appointment of Engineering Assistant Ealing. W.5. and Manager. 24th September. 1945. • 2924 PPLICATIONS are invited for the appointment of an A Engineering Assistant to assist the Chief Engineer­ ing Assistant during the construction of a new Power BOROUGH OF B E C K E N H A M Station. Applicants must have a widd experience an the design, construction and layout of large modern power stations and be Corporate Members of the Institution of Meter Tester and Repairer Electrical Engineers and/or Mechanical Engineers. The salary will be £750 per annum, rising by annual A PPLICATIONS are invited for the position of Meter increments of £25 to £850 per annum, plus war bonus (at ~ ~ . Tester and Repairer for Class A Polyphase Testing present £59 16s. per annum). Station. Some experience is necessary and wages will be The selected candidate will be required to pass a medical in accordance with the D.J.I.C. Schedule, No 10 Area, examination and reside within the Borough. at present 27.49 to 28.30 pence per hour. Applications, giving particulars of age. trailing and Applications, stating age and experience, to be for­ experience, and accompanied by copies of recent testi­ warded to the Borough Electrical Engineer and Manager. monials. should be sent to the Chief Engineer and General Electricity Offices. High Street. Beckenham, and endorsed Manager. Electricity Department. Electric House. Croy­ Meter Tester.” don. endorsed “ Engineering Assistant.” not later than The Ministry of Labour have given permission under 15th October. 1945. 3 , _ the Control of Engagement Order for the vacancy to be The Ministry of Labour and National Service have advertised. authorised this advertisement. L. A. GRIPPER. M.I.E.E.. E. TABERNER. TownBorough Clerk. Electrical Engineer and Manager. September, 1945. 2982 2983 5 , 1945 October E l e c t r ic a l R e v ie w 4 9

CHUDLEIGH ELECTRIC LIGHT & POWER /CLERICAL Assistant. Class A ex-Serviceman. for CO. LTD., SOUTH DEVON ^ Stores Office. Must have thorough knowledge of all electrical material. Apply -London Electrical Company. 92. Blackfriars Road, S.E.l. 24 ■'«Wired. callable of direct inn ONTRACT Engineer to handle orders for motors, il l V a,d classes nf work associated with a C generators and allied equipment. Manchester dis­ small electrical supply undertaking with overhead A.C. trict. Applications from those over 51 or Class A ex- .mains in

X^LECTKJCIANS and Assistants wanted. Class A ex- X> EQUIRED for Paper Mill in India. Chief Super- Servicemen or over 51; permanency to right men. intending Engineer; should have sound theoretical Please write or call—J. H. Plant Ltd., 99. St. Martin’s knowledge and good practical experience of mechanical Lane, W .C.2. 7642 engineering, preferably boiler and power plants, capable X^LECTRICLANS and Assistants required for London of planning extension; member of Institution of Mechanical housing programme. Best conditions, permanency and Electrical Engineers; salary according to qualifications for right men. Class “ A ” ex-Servicemen. or otherwise up to £2,500 per annum, with free quarters (Ref. No. free.—Box 44, c/o The Electrical Review. C.2840XA). Assistant Chief Engineer; good theoretical • T^LECTRICIANS required (London area). Class A ex- knowledge of mechanical engineering, must be well ex­ Servicemen only or over 51. Apply in writing, perienced in layout, planning and designing, knowledge giving full details of experience, to—Box 2863, c/o The of power plant preferable; member of Institution of Electrical Review. Mechanical Engineers; salary according to qualifications X^LECTRICIANS wanted immediately. A priority work. up to £1,000 per annum, with free quarters (Ref. No. 1 Class A ex-Servicemen or men otherwise free. Appli­ C.284IXA). Mechanical Engineer; good experience of cations from demobilised pre-war employees especially erecting machinery, capable of taking charge of main­ appreciated. Apply—Holliday Hall & Stinson Limited. tenance work; associate of Institution of Mechanical Engi­ 36. Victoria Street. Westminster, S.W.l. 7732 neers; salary according to qualifications up to £1.200 per NGINEERS and Draughtsmen, becoming available for annum, with free quarters (Ref. No. C.2842XA). Write, E civil employment, under Class A demobilisation, are quoting the appropriate order number, to Ministry of invited to apply for positions in the Switchgear Depart­ Labour and National Service, Appointments Department. ment of a large electrical engineering manufacturer in the Technical and Scientific Register, Room 670, York House. Midlands. Applications stating age. appropriate technical Kingsway. London, W.C.2. for application form, which qualifications and industrial experience, and salary m ust be returned completed by 22nd October, 1945. 2960 required, to—Box 69, c/o The Electrical Review. ALESMAN required for Glasgow branch of well-known X^XPERIENCED Electrician urgently required. S.E. S large British Electrical Manufacturing concern. District, Class A ex-Serviceman or otherwise free.— State technical qualifications, education, experience, age, Phone. FOR. 5646. -2987 salary required.—Box 2845, c/o The Electrical Review. IRM of electrical engineers and contractors shortly F opening business in the South Scottish area invite STOREKEEPER required by firm of electrical contrac- applications from Electricians and Wire-men experienced ^ tors. Experience preferred but not essential. Class A in the highest grade domestic and industrial installations. ex-Servicemen only or over 51. Apply in writing, giving Permanent positions with good prospects and conditions full details of experience and salary required, to—Box are offered to suitable applicants over 51 years of age or 2864, c/o The Electrical Review. Class A ex-Servicemen. Men expecting release from the SUPERVISING Engineer required by large firm of Services in the near future are particularly invited to ^ electrical contractors to take charge of branch office apply. All applications will be considered and in South Wales. Practical knowledge of all types of first- acknowledged. Reply giving full particulars of age, class electric power and lighting installations essential. training and experience, and when disengaged, to—(Box Apply by letter, giving age, training, experience and 144, Phillips Advertising L td., 15, Wilton R oad, London. remuneration required, to—QBox 2928, c/o The Electrical S.W.l. 2986 Review. Immediately the present employment restrictions X^IRST-class Sales Representative required for the are removed, applications will be considered. London area. It is desirable that the applicant should SWITCHGEAR Sales Representative required for South have a knowledge of Mica and Bakelite Insulation and ^ Wales and West of England. Sound electrical engi­ possess a motor car. This is a progressive position and neering technical training necessary. Apply, stating full applicants should have a good education and be capable details of experience and salary required, to —Box 2964, of conducting negotiations with firms of the highest c/o The Electrical Review. repute. State in confidence age. salary and experience to npELEVISION and Radio Development Engineers and —The Managing Director. H. Clarke & Co. (M/cr.) Ltd.. Draughtsmen required for progressive growing firm, Atlas Works, George Street, Patricroft. 2827 with good prospects. Applicants should be exempt from T ADY required to take charge of Electrical Contractors’ the provisions of the Control of Engagement Order. 1945, Showroom (London). Apply, giving full particulars, or Class “ A ” ex-Servicemen with similar experience. to—Box 2946. c/o The Electrical Review. Our own employees have been notified. Write fully, in 'jVTANAGER required for Winding Dept, of electrical confidence, giving age and salary required, to—Personnel -LtX engineering co. in East London. Applicants must Officer. R .F . Equipm ent L td., Amersham. Bucks. 2921 be good organisers with thorough practical winding ex­ perience of all sizes A.C. and D.C. motors, and be used to rpECHNICAL Sales Engineers. Applications are invited controlling and training mixed labour. Applicants should for a number of appointments covering areas of the state concise particulars of training and subsequent experi­ U.K. as Technical Sales Engineers, Thermovent Electrical ence, age, and salary required.—Box 2965, c/o The Heating. Experience of Space Heating technique and Electrical Review. electrical knowledge essential. Applications, with full ■jY/TANAGER required to take charge of technical details, to—Technical Sales Manager. Thermovent Heating development in the design and production of small (E. K. Cole Ltd.), Rembrandt House, 5 Virgo Street, electric motors. Please send full details of experience and London, W .l. 2926 salary required.—Box 2929, c/o.The Electrical Review. T \T AREHOUSEMAN-Packer and Storekeeper-Counter- VERSEAS Employment.—British Merchant firm * “ hand required. Permanent positions, past experience O requires qualified (by diploma) Mechanical Engineer­ preferred. Over 51 or Class A ex-Servicemen only. ing Assistant for South India, with good electrical and Write stating wages, etc., to—Box 2818, c/o The general experience and initiative, preferably unmarried. Electrical Review. Age not over 30; commencing salary, with allowances, equivalent of £550 to £650 p.a., according to qualifications and experience, plus free passages, outfit allowance and APPOINTMENTS FILLED leave pay. Five years agreement in first instance. Dissatisfaction having been so often expressed that un­ Applications, which must be in writing, stating date of successful applicants are left in ignorance of the fact that birth, full details of qualifications and experience, including the position applied for has been filled, may we suggest present employment; also identity and National Service that Advertisers notify us to that effect when they have and other registration particulars, and quoting Reference arrived at a decision? We will then insert a notice free No. O.S. 988. should be addressed to the Ministry of of charge under this heading. Labour and National Service. Appointments Department, Sardinia Street, Kingsway, London. W.C.2. 2925 T3LANNING Engineer, to take charge of planning SITUATIONS WANTED -1- departm ent and jig »nd tool drawing office. Must be first-class jig and tool designer having good all-round ADMINISTRATIVE experience with mass production particularly on small mechanisms utilising press work, auto parts and bakelite TTNGINEER (28) seeks responsible post offering scope mouldings. Class A ex-Servicemen accepted until present f- * for his extensive industrial experience and technical restrictions removed. Good salary offered for right man. knowledge of electrical engineering generally, and in parti­ Write giving age. salary expected, experience, etc. to— cular of the design, manufacture, maintenance and appli­ Box 2878, c/o The Electrical Review. cations of electrical machinery, including fractional h p ADIO Designer-Engineer wanted by firm about to machines. The advertiser, after 5i years’ Admiralty ser­ R manufacture luxury radiogram for export. Only vice, is an experienced negotiator and organiser; is keen, first-class Class A ex-Servicemen with modern ideas and industrious and a good disciplinarian. Available when suitable for good salaried position. Write—Box 2957, c/o convenient. Salary £600 p.a.—Box 7724, c/o The Flec- The Electrical Review. trical Review. October 5, 1945 E l e c t r ic a l R e v ie w 51

ADMLRALTV appointment ceasing, six years South "C'LECTRICIAN. Supervisory, installation, estimating Wales factories, sales, administration and transport and maintenance. London district.—Box 7746. experience, seeks post as Branch Manager, would consider c/o The Electrical Review. .7fi5i;' 0 /0 Thl' Electrical Review. ^NGINEER (31) seeks progressive position. Ordinary \ UVLK 1 IbLll. Accountant aged 35. for many years in E1 and Higher National Certificates (Elec. Eng.). Free well-known contractor's office, desires change. to take up immediate employment. Six years with well- Thoroughly experienced in preparation of tenders and known firm of industrial instrument manufacturers. administration of large contracts in all stages including Would consider sales or laboratory work. London area final accounts. Responsible position with prospects of only.—Pitt-Bayly. 59a, Oxford Gardens, W.10. 7691 further advancement required by man with drive and NGINEERING Executive (30). A.M. I.E .E .. Int. initiative.—Box 7666. c/o The Electrical Review. E A.M.I.P.E., with sound industrial experience, desires A .M.I.E.E., Int.A.M.I.P.E. (30) desires position as position with Electricity Supply undertaking, min. re­ assistant works manager in progressive electrical muneration £500 p.a.—Box 7643. c/o The Electrical company. Design. D.O.. estimating, workshop and Review. executive experience. Remuneration £600 p.a.—Box 7749. NGINEER (Mechanical), age 37. seeks post in South. c/o The Electrical Review. E 18 years' experience on design-development of A .M.I.E.E. (31). released end September, desires per- electro*-mechanical apparatus, including television and manent and progressive post with consulting or radio equipment. Present salary £500.—Box 7745. c/o manufacturing engineers. 5 years’ apprenticeship. Good The Electrical Review. executive and organising abilities. Extensive experience T^NGINEER (35). Grad. I.E.E., public school; release in ship’s installation, design, production and manufacture group 17. seeks executive position technical sales of machinery and associated equipment.—Box 7660. c/o or alternative. 15 years’ extensive experience electrical The Electrical Review. and radio industry, home and abroad. 3 years centimetric A .M.I.E.E., D.F.H. (30), Public School, 8 years' radar. Sound technical training, wide experience plant experience Babcock & Wilcox High Pressure Boilers installation and maintenance, departmental control, sales and Parsons Turbo Alternators in power stations in and stores records and analysis, publicity, personnel India, desires change preferably Far East. Existing post management. Good connections Mexico and S. America. involving administration, mains and power station —Box 2990. c/o The Electrical Review. operation, including erection and commissioning all types X^XPORT Manager. A.M.I.E.E. (38), good education. above plant. Hindustani spoken fluently. Free for re­ * works training, wide experience, requires position engagement within six months.—Box 2822. c/o The with progressive firm.—Box 7668, c/o The Electrical Electrical Review. Review. A N Electrical Engineer. B.Sc., 31. good all-round ENTLEMAN (28). not liable military service, public practical experience of rheostatic controls, rotating school, now sub-contracts zone chief aircraft factory, machinery, multi-range electrical instruments, etc.. desires experienced sales correspondent, high-pressure progressing, progressive position.—Box 7653, c/o The Electrical order editing and planning, materials control, requires Review. position Assistant Sales Manager or Outside Representa­ RMY officer, release 21. seeks position with well-estab­ tive radio-electrical component industry.—M. B. Fitch. A lished firm, 10 yrs.’ experience wholesale and retail, White Lion. Walkern, Herts. 7734 domestic appliances and installations. Capable of design­ LLUMINATING Engineer, age 30. qualified, requires ing electric appliances.—Box 7692, c/o The Electrical I progressive situation, home or abroad. At present Review. Serving Technical Officer. Early Release expected under Class " A ” .—'Box 7722. c /o The Electrical Review. UYER and Stores Supervisor seeks position with con­ IGHTING Fittings, Domestic Appliances and Radio. B cern manufacturing Engineering and Electrical L Advertiser, 15 years’ experience. London showrooms, equipment. Fully experienced in buying, modern stock ex-officer, just released, seeks appointment London area control methods, and stores routine, etc.—Box 7702 c/o as Showroom Manager. Buyer. Sales.—Box 7687, c/o The The Electrical Review. Electrical Review. HARGEHAND Electrician. 38, seeks opportunity to .Sc. Honours degree electrical engineering. 16 years’ C manage electrical business, wide experience. Wife M experience, generators, motors, electrical instru­ could assist. Ex. refs.—Box 7703, c/o The Electrical ments and electronics, own patents, wants to change Review. position.—Box 7661. c/o The Electrical Review. HIEF Electrical Engineer, age 33. presently respon­ AVAL P etty Officer T.G.M. (31). Class A. Telease C sible for layout, installation, maintenance of E.H.T., N Oct.. seeks post as maintenance electrician in H.T. and L.T. distributions, works capacity 4.600 kVIA, London area. Ten years’ practical experience motors. # experienced costing, estimating; desires position home or instruments, lighting, telephones, batteries. Accustomed abroad.—Box 7707, c/o The Electrical Review. to responsibility.—Box 7751. c/o The Electrical Review. LASS A ex-Officer R.E.. A.M.I.E.E.. 25 years’ OST-war. Advertiser desires change, wishes represent C civilian experience Supervising Engineer with flrst- P manufacturers producing good class Electrical Water class contractors. Grid. H.T. and L.T. O/H lines. H.T. Heating Apparatus, etc. All-round knowledge technical cables, substations and ancillary gear. Seeks permanent and commercial, extensive connection, guarantee business. and progressive responsible position. North preferred but Midlands preferred.—B’ox 7730, c/o The Electrical Review. any fixed area suitable. Present salary £650.—Box 7646. ESPONSIBLE executive position required, offering c/o The Electrical Review. R attractive prospects. Present Sales Manager (30). ESIGNER and patentee Domestic Electrical with good connections and wide experience of sales, pro­ D Appliances desires contact manufacturers established duction. staff control and administration. Midland area or wishing to enter industry, view to arrangement for preferred. Please indicate salary and position in full.— designs, consultations regarding manufacture, marketing, Box 7723. c /o The Electrical Review. etc.—Box 7648, c/o The Electrical Review. ALES Engineer, available now. specialist in lifts, LECTRICAL and Mechanical Engineer, M.A.S.E.E. S cranes and industrial installations. London and South E Age 34. 17 years’ experience. At present Station preferred. Age 42.—Jenkins. 32. Westway. S.W.20. 7757 Engineer. Air Ministry. Desires to settle in any one CIENCE Graduate in mathematics (24) seeks post.— location seeks position with Works, Corporation or Supply S Box 7748. c /o The Electrical Review. Co. Mains or Assistant Engineer; similar. Manager of TAFF Foreman and Supervisor (43). able to control Works.—Box 7750. c/o The Electrical Review. S labour and execute large contracts, drawings, "I^LECTRICAL and Mechanical Engineer (35). 15 years’ wages, etc.. desires change. At present and for number experience in design and manufacture of fractional of years staff foreman for well-known electrical con­ motors and domestic appliances, requires executive tractors. Would consider practical assistant to con­ position in charge of design and development. Salary sultant—Box 7753. c/o The Electrical Review. £850.—Box 7747, c/o The Electrical Review. SUPERVISOR (38). requires settled post, anywhere. LECTRICAL Engineer (33). with National Certificate ^ experienced. O/H lines. U/G. and installations.— and a wide experience in maintenance and installation Box 7701. c/o The Electrical Review. work, seeks a position of responsibility.—Box 7725. c/o ECHNICAL Sales Engineer (40). A.I.E.E.. and Central The Electrical Review. T Register, desires appointment with manufacturer. LECTRICAL Maintenance Engineer. 29. requires Over 15 years’ experience L.T. power distribution equip­ E position. Graduate I.E.E. Higher National Certi- ment. industrial lighting and heating schemes. Established endorsed with workshop organisation and manage­ connection wide area Midlands public utility undertakings ment and industrial administration. 1st and 2nd Class and important industrial concerns. Own car and tele­ Certificates of Association of Mining Electrical Engineers. phone.—'Box 7744. c /o The Electrical Review. Box 7658. c/o The Electrical Review. '1TTORKS Superintendent desires change. 20 years’ TT'LECTRICIAN. Maintenance. Installations. Handy exDerience. radio and light mechanical production, h i T7;ttPr drive car. 47.-seeks permanent position—A. knowledge of time study, etc. Go anywhere.—Box 7693. 7. St L u k e ’s Avenue. Clapham. S.W.4. 7698 I c/o The Electrical Review. . 52 E l e c t r i c a l R e v ie w October 5, 1945

FOR SA LE ELECTRIC MOTORS AND DYNAMOS Traders buying and selling hereunder must observe the Restriction of Resale Order. S. R. & O. 1942 No. 958. TXTE hold one of t he largest stocks of New and Second- v T hand Motors. Secondhand machines are thoroughly- overhauled. Inspection and tests can be made at our GEORGE COHEN, SONS & CO. LTD. Works.

for For Sale or Hire. Send your enquiries to: — GUARANTEED ELECTRICAL BRITANNIA MANUFACTURING CO. LTD.. PLANT. 22-26. BRITANNIA WALK. CITY ROAD. LONDON. N.I. M O T O R S . GENERATORS. Telephone: 5512-3 Clerkenwell. - 13 SWITCHGEAR. COX & DANKS LTD. etc. for MOTORS AND DYNAMOS, A.C. AND D.C. WOOD LANE. LONDON. W.12. DISTRIBUTION BOXES, SWITCHGEAR. Telephone: Shepherds Bush 2070 Large Stocks—Prompt Delivery. and Visitors always welcome. STANNINGLEY. NEAR LEEDS. Telephone: Pudsey 2241. FAGGS ROAD. FELTHAM. MIDDX. Tel. Feltham 3471/3. 72 Established 1834. 27 BURDETTE & CO. LTD. COUNTY BOROUGH OF BRIG H TO N Stock Electricity Undertaking Reconditioned A.C. and D.C. Motors and Starters Equal OR SALE: THREE SETS OF 3 SINGLE-PHASE to New. F CONCRETE FRAME REACTORS, designed for 11-kV operation, capable of carrying 400 amperes con­ STONHOUSE STREET. CLAPHAM. S.W.4. tinuously and giving a reactive drop of 5.5 per cent, on that current. Day and night service. MACaulay 4555. The plant may be inspected on application to Mr. H. 17 Pryce-Jones. Engineer and Manager. Electric House. Castle Square. Brighton. 1. Tenders, addressed to the large stock of Searchlights (sale or hire), also Winches undersigned, must be delivered not later than 12 noon A of our self-sustaining type. Hundreds of thousands on Monday. 22nd October. 1945. supplied during the last 40 years to Government depart­ No tender will be considered unless received in a plain ments, corporations and innumerable traders. Mirrors. sealed envelope, not bearing any riame or mark indicating Lenses. A.I.D. Turnbuckles. etc.. also surplus Carbon Rods. the sender and endorsed “ Tender for Reactors.” Ebonite and Fibre.—London Electric Firm, Croydon. 42 J . G. DREW . .C. and D.C. House Service Meters, all sizes, quarterly Town Hall. Brighton. Town Clerk. A and prepayment, reconditioned, guaranteed one yeax. 24th September, 1945. 2935 Repairs and recalibrations.—The Victa Electrical Co.. 47. Battersea High Street. S.W .ll. Tel. Battersea 0780. 19 A G. and D.C. Motors, all sizes, large stocks, fully REBUILT MOTORS AND GENERATORS guaranteed.—Milo Engineering Works, Milo Road. East Dulwich. S.E.22 (Forest Hill 4422). 7528 .C. Motors. l/50th h.p. to 10 h.p.. from stock. Also X ONG deliveries can often be avoided by purchasing A D.C.—The Johnson Engineering Co.. 86, Great Port­ rebuilt secondhand plant. We can redesign or replace land Street. London. W.l. Tel.: Museum 6373. 57 surplus plant of any size. ERIAL Cables, all sizes quoted for, good deliveries.— A Edwardes Bros.. 20, Blackfriars Road, London. SEND US YOUR ENQUIRIES. S .E .l. 7735 LL types of Transformers up to 15 kVA, including OVER 1.000 RATINGS ACTUALLY TN STOCK HERE. A neon and fluorescent lighting chokes.—Woden Trans­ former Co. (Phone. Bilston 41959). Moxley Road. Bilston. DY N A M O & MOTOR R E P A IR S LTD., Staffs. 12 Wembley Park, Middlesex. lternator. 200 kVA. 250 r.p.m .. 400/ 3 / 50. for Telephone: Wembley 3121 (4 lines). A coupling, perfect order. — The Electroplant Co.. Wembley. Middx. 2952 Also at Phoenix Works, Belgrave Terrace, Soho Road, EST English Cables, 1/.044 up to 127/.103. deliveries. B —Edwardes Bros., 20, Blackfriars Road. London. Handsworth, Birmingham. S .E .l. 7736 Telephone: Northern 0898. /CARBONS, large stocks assorted sizes, solid and cored.— 26 ^ Edwardes Bros., 20. Blackfriars Road. London. S .E .l. 7737 WATER TUBE BOILERS IN STOCK {CENTRIFUGAL Pump by Pulsometer. 4 stage. 300 ^ g.p.m.. 277 ft. head. 1.000 r.p.m. Just completely Two 55.000 lbs. evaporation, 270 lbs. W.P. rebuilt by makers.—Fyfe. Wilson & Co. Ltd., Station Two 25.000 lbs. .. 250 lbs. .. Works. Bishop’s Stortford. 2970 Two 25.000 lbs. .. 175 lbs. ,. /CONTACTOR for sale; 200 amp., double pole, 480 v.. Three 20.000 lbs. .. 175 lbs. .. ^ D.C.. with 240 v. operating coil by Alien West.— Two 16.000 lbs. .. 190 lbs. .. Ferguson Edwards & Co. (London) Ltd.. Hoxton Square. One 12.000 lbs. .. 200 lbs. .. N .I. 2927 , One 9/10.000 lbs. .. 200 lbs. .. TAIESEL-driven Alternating Set. Generator by Cromp- We install complete, including brickwork. Economisers, ton Parkinson. 40 kVA. 240 volts, single-phase, Pumps, Piping Valves. Generating Sets and Motors in enclosed screen protected, ball bearings. 1.000 r.p.m.. with stock. Please send us your enquiries; we can give exciter; coupled to a 3-cylinder enclosed upright Diesel immediate delivery. Engine by Ruston & Hornsby. The whole built on cast- iron base, complete with daily fuel tank and silencer and BURFORD, T A Y LO R & CO. LTD., expansion chamber, starting handle, with switchboard. Boiler Specialists. Middlesbrough. In new condition.—Thos. W. Ward Ltd.. Brettenham Telephone: Middlesbrough 2622. House. Lancaster Place, London. W.C.2. Telephone No. 32 Temple B ar 9631. 2891 October 5, 1945 E l e c t r i c a l R e v ie w 53

TT0? in first-class condition, going on mains: SEVERAL Telescopic Tower Ladders ready for essential Ljste* Diesel Lighting Sets, fully automatic, work. Extension's. Trestles and Steps to order.— working in parallel, of 3.5 and 7.5 kW capacity respec­ Shaftesbury Ladders Ltd., 453, Katherine Road, E.7. y** tively» 230 v. D.C. Chlonde B attery, sealed type cells, Grange wood 3363. 15 125 amp. hr. capacity, and battery stands. Boving OPECIAL line Bell and Telephone Wires, also screened modern single runner vertical shaft Francis Water Turbine ^ wires, large quantity, clean.—Edwardes Bros.. 20. Plant, complete with automatic oil pressure speed Blackfriars Road, London, S.E.l. 7741 governor, and direct coupled Crompton Parkinson, 21 kW. OTAFF Time Checking and Job Costing Time Recorders Generator, 220/230 v. D.C., switchgear, etc. One G.E.C. ^ (all makes) for quick cash sale. Exceptional con­ Motor, 8 h.p. D.C. One G.E.C. Motor. 12* h.p. D.C. dition. W rite — Box 528, Smiths, 100, Fleet Streeet. Four 220 v. D.C./A.C. Rotary Convertors.—'Apply London, E.C.4. 31 Ravenswick E state Office, Kirbymoorside, Yosks. 2985 STREET Lighting. Steel Lamp Columns, 9 to 14 feet T^OR sale. Working Drawings, Winding Details. Patterns. ^ out of ground. Large quantity available.—Box 2874. etc., for a range of small A.C. eleotric motors. c/o The Electrical Review. Offers wanted.—Box 7752, c /o The Electrical Review. QWITCH and Fuse Units, Conduits and fittings, works e n e ra tin g Sets, is kVA, 400/ 3/50 petrol; 2* k w . ^ requirements stocked.—Edwardes Bros., 20. Black­ G 220 v. D.C. crude oil set.—Fyfe, Wilson & Co. Ltd., friars Road, London. S .E .l. 7742 Bishop’s Stortford. 2969 Q WITCHBOARDS suitable for dynamos and alternators. NSU-Glass covered Plain or Enamelled Instrument ^ all sizes from 100 amp. up to 1.500 amp.—Britannia I Wires. No. 18 s.w.g., No. 40 s.w.g., stock deliveries.— Manufacturing Co. Ltd.. 22/26, Britannia Walk, London, Saxonia. Roan Works, Greenwich. S.E.10. 29 N I 25 RUPP Horizontal (cable covering) Press (2 cylinders npABLE Lamp Standards, Cables. Accessories, Coloured K opposed), water rams 19.5" diameter, lead rams 6" -1- Lamps, etc.—Universal Distributing Co. Ltd., 68. diameter. 18" stroke Xworking), working pressure (hydrau­ Great Eastern Street, E.C.2. Bis. 6777. 2906 lic) 2£ tons sq. in.. lead container capacity 420 lbs. Press riXHE Committee of Management, Holloway Sanatorium. with hydraulic pump in working condition complete with Virginia Water, have for disposal, due to changing oil-heated melting pot, etc. Can be inspected at works of— over to electricity company’s supply. 1 9£" x 15" x 8" Southern United Telephone Cables Ltd., Dagenham Dock. Enclosed Compound Steam Engine by Peter Brotherhood Essex. 2944 direct coupled to 60-kW Bull Compound D.C. Generator. ARGE range of electrical accessories now available. 110/120 volts, steam pressure 125 lbs. sq. in. The plant L Electric Fires. Metal-made and Plastic Table Lamps is in good working order and can be *Seen on application (excellent range), Floor Standard Lamps, variety of Lamp to the Medical Supt. Price £300. 2941 Shades. Electric Irons. Wireless and Lighting Batteries. RANSFORMER Lead-in Wire, 7/38 and 14/38 s.w.g., Write for latest list.—Brooks & Bohm Ltd.. 90. Victoria T Insu-Glass finished, various colours, stock.—Saxopia. Street. London. S.W.l. 2629 Greenwich. S.E.10. 34 EAD-covered and Armoured Cables. P.I. and. V.I.R., .R.S. Cables and Flexibles, Welding Cables supplied.— L various special lines at low prices.—Edwardes Bros., T Edwardes Bros., 20, Blackfriars Road, London. 20, Blackfriars Road. London. S .E .l. 7738 S .E .l. 7743 ESLIE Dixon & Co. for Dynamos, Motors. Switchgear, Lister 9-h.p. Diesel Engines, direct coupled to genera­ L Chargers and Telephones.—214, Queenstown Road. 2 tors, 22 amp., 230 volt D.C., with switchboards, fuel Battersea, S.W.8. Telephone, MACaulay 2159. Nearest and cooling tanks. In good working order. Sold together Rly. Sta.: Queen’s Road, Battersea (S.RJ. 18 or separately. Offers to—Royal Agricultural College. ,G. Set. 200/1/50 p.. 40 volts, 20 amp. sec., starter Cirencester. 2939 M'[ and regulator, ex. cond.—Box 2853, c/o The Elec­ Electrical Fittings, modern, centre champagne glass trical Review. 1 2 with four decorated fins of flying birds. Overall IV f OTOR Generator Set by Metro-Vick, on cast-iron measurements 1' 2" by 1' 7", suitable for hotel, ballroom L*-*- baseplate. In p u t 31 h.p.. 230 volts D.C., 1,100 or cinema use. The lot, £50. W rite—Box 2931. c/o The r.p.m. Output 180 amps., 90/110 volts shunt D.C., 1,100 Electrical Review. r.p.m. With control panel and regulator.—Newman •h.p. and 30-h.p. slipring, Crompton/ Parkinson 720 Industries Limited, Y ate, Bristol. 2904 4 0 1r.p.m. 3-phase, roller and ball bearing modern OTOR Generator Sets and Convertors, all sizes and Motors, with* oil immersed starting gear.—The G. W. E. M[ cvoltages from £ kW up to 500 kW in stock.— & W . Co. L td., 43a, High Street. Brentford, Mddx. Britannia Manufacturing Co. Ltd., 22/26, Britannia Walk. Phone. EAL. 2541. 2982 City Road. London, N .I. Telephone. Clerkenwell 5512. h.p. “ Laurence Scott’’ Slipring Motor, 400/3/50, 5513 & 5&L4. - 28 lO O 1 screen protected, ball bearing. 930 r.p.m. "VTAMEPLATES. Engraving, Diesinking. Stencils, Steel Complete with “ Allen West ” oil immersed Starter. Punches.—Stilwell & Sons Ltd.. 152, Far Gosford Date 1941. — Stewart Thomson & Sons, Fort Road. Street. Coventry. 14 Seaforth. Liverpool, 21. 55 /'YIL-cooled Transform ers: One 100 kVA 4 4 0 /ITS volts •kVA Beiliss/Crompton Alternator, 400/3/50, 4- 3-phase, 50 cycles, oil-cooled by Metropolitan 1401wire. Seen running.—Stewart Thomson & Sons. Vickers. Three 80-kVA dittos.—George Cohen, Sons & Fort Road. Seaforth, Liverpool. 21. 47 Co. Ltd.. Stanningley, near Leeds. 2978 O fT /y k V A Alternator, 400 volts, 3-phase, 50 cycles, 750 NE 30-h.p. Motor, 400 volts, 50 cycles, 1,460 r.p.m .. revs., with direct-coupled exciter; also two 250- O enclosed ventilated, 3-phase, slip ring, by English kW Rotary Converters, with transformers and switchgear, Electric Co., with oil-immersed starter by same company, input 6,600 volts, 3-phase, 50 cycles, output 420/210 volts purchased early 1943; one 12-h.p. Motor. 400 volts, 50 D.C.—Midland Counties Electrical Engineering Co. Ltd., cycles. 3-phase, enclosed ventilated, slip ring, 720 r.p.m ., Grice Street, Spon Lane, West Bromwich. 36 by B .T .H .; one 10-h^p. Motor, 400 volts, 50 cycles, 3- O T'O Second-hand Electric Miners' Safety Lamps com- phase, enclosed ventilated, slip ring. 750 r.p.m., by piete with Alkaline Accumulators; also Charging B.T.H.; one 15-h.p., 400-volts, 3-phase. 50-cycles Squirrel Equipment for 48 lamps, complete with resistances for use Cage Motor, 960 r.p.m., by Brook. Apply—N. H. Engi­ on 230 volts direct current. Offers to Chief Engineer and neering L td., Woodchester, Glos. 2866 General Manager, Derby Corporation Electricity Depart­ HONE 98 Staines. 60-kW Allen Crude Oil Set, 220 vo. ment, 36, Full Street, Derby. 2873 P D.C.; 130-kW Diesel Set. 110 vo. D.C. (now running); A rr^-b-P- Slipring Induction Motor by Laurence Scott Three-throw High Pressure Pump, 3£" X 6", 700lbs.w.p.; 6 O & Electromotors, 400 volts, 3-phase, 50 cycles, 242 34-kW Steam Generating Set, 220 vo. D.C.; 20-h.p. Ruston r.p .m .; new 1936. Two pedestal bearings, external slip- Oil Engine and 7/9-kW. 110-vo. Dynamo; 50-kW Steam rings. Machine in first-class condition.—George Cohen. Generating Set. 440/220 vo. D.C.—Harry H. Gardam & Sons & Co. L td.. Stanningley, near Leeds. 2979 Co. L td.. Staines. 60 lengths approx. 4' Circular Flex fitted with ORCELAIN Cleats, 2 and 3 groove, various sizes ex »XJw v j Bakelite B.C. Adaptor, Is./3d. each.— P stock, price list.—Edwardes Bros., 20, Blackfriars Universal, 68, G reat Eastern Street, E.C.2. 2973 Road. London, S.E.l. 7739 ORCELAIN Insulators, various sizes in stock, galv. P spindles. — Edwardes Bros., 20, Blackfriars Road. ARTICLES WANTED London. S.E.l. „ . x 7^° CETATE and other thermoplastic scrap; polythene-and OTARY Convertor. D.C. to A.C., input 240 volts, A P.V.C. in any form; also scrap cable and insulated R output 1.000 watts at 200 volts ,50 watts at 210 wire; urgently wanted.—Elton Levy & Co. L td., 18, St. volts, or 500 watts at 230 volts. Offers to—Chief Con­ Thomas Street. S.E.l. 30 stable. Bradford. • • NGINEERING Technical Books (new or secondhand) OTARY Converters in stock, all sizes, enquiries E wanted in any quantity. Attraetive cash offers. Call hi vit^ .—Universal Electrical. 221. City Road —Third floor, 356, Oxford Street, W.l, or “ Stoneleigh." R St. George’s Avenue, Weybridge. 62 London, E.C.l. 54 E l e c t r i c a l R e v ie w October 5 , 1 9 4 5

REQUIRED A GENCIES required, South of England, including the 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. A GENCIES required for London, South of England, for "REQUIRED. AUTOMATIC COIL WINDING the following: (1) Domestic electrical appliances: , v MACHINES FOR ELECTRICAL COIL (2) Brass electrical accessories, switch plugs, etc.: (3) Con­ WINDING.—Box 38. c/o The Electrical Review. duit. Advertisers have clientele with every wholesaler in the territory mentioned. Immediate turnover can be guaranteed. Either commission or buying basis. Post­ war arrangements considered. — Box 64. c/o The Elec­ 38 trical Review. A GENCIES required for Southern Rhodesia. New elec- trical and refrigeration business commencing in near WANTED— future. Manufacturers, etc., interested forward full SURPLUS ELECTRICAL MACHINERY particulars, catalogues, etc.. to—Advertiser. P.O. Box 503. Bulawayo. S. Rhodesia. 7731 \\7 E ARE OPEN TO PURCHASE XC LECTRICAL Engineering Company operating in the * ▼ LARGE QUANTITIES OF ^ North-West Area, with good connections in the MOTORS. GENERATORS. SETS. industrial sphere, and with storage facilities, desire to ETC.. OF ALL DESCRIPTIONS. establish agency relations with manufacturers for the sale and servicing of geared motor units.—Box 43. c/o The G. P. U. LTD.. Electrical Review. WEMBLEY. MIDDX. A MANUFACTURERS’ Agents, covering the whole of 2951 ^ Great Britain and Colonies, are desirous of contact­ ing manufacturers with a view to sole selling rights (either /QUOTATIONS required from manufacturers of finest commission or buying), post-war arrangements considered. ^ quality Electrical Accessories. Cables and Flexibles. —Box 23. c/o The Electrical Review. Wireless Receivers. Fans, Refrigerators and all domestic AfANUFALTLRERS of Electrical Appliances etc.! appliances for export to Egypt and Turkey.—Box 7688. Distribution to wholesalers of long standing ensunes c/o The Electrical Review. a sound market. Agent with well-established connection OTARY Convertor, input 6.600 volts, 3-phase, 50 offers services in Yorkshire. Northumberland and Durham. R cycles, output 400/460 volts D.C. complete with —Box 7655. c/o The Electrical Review. suitable transformer and starting panel. Will consider A TAN UFACTURERS of electrical conduits and fittings units of one. two or three thousand kilo-watt capacity. require Agent for Midlands. Reply—Box 2956. c/o Full particulars and price to—Box 2808, c/o The Elec- The Electrical Review. trical Review. A T ANUFACTURERS of Electro-Magnetic Relays re- AXTANTED—Lister Diesel Generating Set. about 22-kW — quire an Agent for Greater London, the Home “ * 250 volts. D.C. Must be in first-class condition and Counties. South Coast. South Wales. Must be technically reasonable price.—Peacock. High St.. Denbigh. Denbigh qualified and have connections in the industrial and supply shire. 7641 companies field. Give full details, stating territory covered \\T ANTED. Rotary Converters, any size.—Universal. and agencies held.—Box 2879. c/o The Electrical Review. » * 221. City Road. London, E.C.l. 22 ATTANTED. 50.000 Tubular and other Electric Fire A I"OTOR Control Gear Manufacturers, with large range. * * Bars. Wholesalers may receive electric fire supplies require established Agent for South Wales district. in return.—Globelite Batteries Ltd.. 90. Victoria Street. Connection in collieries and steel works essential.—Box S.W.l. Victoria 9550. 2940 j 7728. c/o The Electrical Review. /ALD and well-established firm of engineers in Holland desires to represent firms producing anything con- AGENCIES nected with electrical engineering.—Handelsonderneming ‘ en Ingenieurs-bureau C. Badenhuizen. Veestraat 4a. W A N T E D — Helmond. 7755 T ) EPRESENTATTVES with good connections required AGENT-DI ST RI BUTORS for Non-Ring Lamps. Very favourable terms.— Box 66. c/o The Electrical Review. T>ARMEKO LTD.. OF LEICESTER, intend to appoint OW ISS firm, with first-class connection amongst whole- Agents for selling, distribution and servicing of ^ salers throughout Switzerland, desires offers on sole of PARMEKO SOUND REPRODUCING EQUIPMENT j selling basis for electric bells, hooters, buzzers, low-tension in areas throughout the country. Applications are in­ push contacts, sliding contacts, flooring contacts, vited from established firms with staff for large wiring i call signals, callipers in isolating material, volt- installations of factories and public buildings. A good ; meters for alternative currents, etc.. in Swiss francs, free trading reputation and wide connections and experience on rail Swiss frontier, exclusive duty, but including packing. in this type of work are essential. Please submit catalogues. Write to—Box 7721. c/o The ! Electrical Review. The equipment is designed for Manufacturers of Electrical Goods desirous of dis- -f- tribution direct to the retail market. A well-estab­ INDUSTRY ("Music while I SCHOOLS lished Agent offers services of sales organisation for you work.” Paging. Fire I THEATRES Yorkshire.—Box 7654. c/o The Electrical Review. Alarm, etc.) | HOTELS HOLESALERS' Agents wanted, most areas, to take PUBLIC BUILDINGS SPORTS EVENTS, etc. * * up our range of Decorative Electrical Fittings. We are actual manufacturers.—Leon’s. 153, High Street. Full details to Department B.3, Epsom. Surrey. Epsom 2400. 7491 PARMEKO LTD.. AYLEST0NE PARK, LEICESTER 2680 WORK WANTED AND OFFERED /CLO CK W O RK Controllers for Public Lighting. Clocks. REPRESENTATION Control and Time Switches. Electric Clocks and all types of instruments and appliances operated by clockwork repaired and overhauled. Inquiries welcomed.—J. W. & ELL-known firm in Holland, connected with Govern­ R. E. Hughes (Clockwork Engineers). 58. Victoria Street. W ment. community institutions, private business, etc.. London. S.W.l. Phone. Victoria 0134. 35 solicits representation of manufactory Electric Cable. Flexible Cord and Wire. Telephone Equipment: factory /CONTRACTORS recently engaged on manufacture of and different sub-divisions for low tension current. M.A.P. and M.O.S. equipment now have capacity Enquiries. “ HUISTELEFOON ONDERNEMING.” 78. available for Light Bench Assembly Work.—Box 2789. KONINGINNE GRACHT. THE HAGUE. HOLLAND. c/o The Electrical Review. 2862 /CONTRACT work wanted for Machining. Capstan. ^ Turning and Grinding by fully equipped firm engaged throughout war on M.A.P. and M.O.S. work.—Box 2790. well-known large British Electrical Manufacturing r /o The Electrical Review. A concern is prepared to consider applications for their rPECHNICAL Translation work undertaken by experts. North of Ireland Agency from established agents. State -1- —Techniglot. 261, Eversholt Street. Mornington Cres­ fullest particulars.—Box 2846, c/o The Electrical Review. cent. N.W.l. 7733 October 5, 1945 E l e c t r i c a l R e v ie w 55

"% rACHTSING Work, for Centre Lathes np to 6$ in. _ . “ Dttes and mediam~ized milling (good grade work PATENT NOTICES preferred). The London Electric Firm, Croydon. Lo- A UTOMATIC Regulation and Control of Temperature lands 4871. 56 1 prov. pat.). Inventor ready to consider offers.— MAT.L Armatures, etc., winding or re-winding, in Box 7754. c/o The Electrical Review. S quantity. High-class work, prompt delivery.— 'V'OTICE is hereby given that The British Thomson- Southern Ignition Co. Ltd.. 190. Thornton Road. Croy­ Houston Company Limited seek leave to amend the don 59 specification of Letters Patent No. 569308, entitled " Im­ provements in and relating to Vitreous Compositions.” Particulars of the proposed amendment were set forth in BUSINESS OPPORTUNITIES the Official Journal (Patents), No. 2957. dated September 26th. 1945. Any person may give Notice of Opposition LIGHTING AND POWER FUSES to the amendment by leaving Patents Form No. 19 at the P atent Office. 25. Southam pton Buildings. London. W.C.2. on or before the 26th October, 1945. 2948 T^NGINEERING CONCERN always interested ^ in new light engineering developments wishes EDUCATIONAL NOTICES to contact firms or individuals who have ideas or patents particularly relating to simplified fuses which allow for easy modification of existing LATEST A.M.I.E.E. RESULTS devices in household or factory. Details in con­ fidence to— 2949. c7o The Electrical Review. Bex N the recent Examinations held by the Institution of I Electrical Engineers 477 Candidates sat who had Y Group of four successful Electrical Companies, built taken B.I.E.T. courses. Of these 457 were successful in M np from a “ one man show ” to a quarter million passing the examinations. We believe this record of 457 turnover within ten years, is about to extend its activities. successes out of 477 entrants has never before been Manufacturing facilities, administrative and technical staff approached by any oral or correspondence tutorial avaüahle. with selling organisation at home and overseas. organisation, and indicates the very high efficiency of Now seek contact with manufacturers of products for the the modem system of Technical training which we have Electrical. Radio. Engineering and Budding trades with laid down. a view to acting as sole selling agents, and assisting from The B.LE.T. tutorial organisation is waiting to assist manufacturing and financial sides if necessary. Highest you either with a short specialist course or complete régences offered. Replies, treated in strictest confidence, training for a recognised examination. to Managing Director.—Box 2935. c/o The Electrical We have available a large full-time staff of instructors, Review. while the efficiency of our extensive organisation is a BUSINESSES FOR SALE byword among engineers. W E G U A R A N T E E — “ NO PASS— NO F E E ” AND WANTED May we send a copy of “ ENGINEERING OPPOR­ TTLECTRICAL Fittings and Appliance Business for sale TUNITIES ’ ’ ? Containing a great deal of nsefnl advice jE ¿q prominent position Beds, town, lease £510 per and detailed information on over 200 Home-Study Courses annum, old est. Price for goodwill and lease. £10.000. and examinations, this handbook is of very real value to plus stock and fixtures at valuation. Full pars.—Henry the ambitious engineer. Butcher k. Co.. 73, Chancery Lane. London. W.C.2. 2941 XTX-Serrieeman desires to purchase sound domestic Our highly informative handbook will be sent FREE J L electrical equipment business.—Box 7727, c/o The and without obligation on request. Electrical Review. BRITISH INSTITUTE OF ENGINEERING W AN TED . Radio Electrical business, southern Eng- ' t laand. Sales, repairs, installations.—Box 7696. c/o TECHNOLOGY. The Electrical Review. Established 1927— over 200.000 students. MISCELLANEOUS 12, Shakespeare House, 17, II. & 19. Stratford Place, Oxford Street, London, W.l. 33 LONDON EXHIBITION of ENGINEERING CAREERS AND NEW ENGINEERING PRODUCTS QUALIFICATIONS

N behalf of various manufacturers, and OTH Government and industry have announced and O for the convenience of many customers B emphasised that young men with technical know­ from Abroad, as well as at Heme, a well- ledge and qualifications must receive every chance of known Engineering Concern will shortly rising to the highest posts within their capacity in post­ open, in their large premises, an Exhibition war engineering and allied industry. Write to-day for of new Electrical and Mechanical Plant and “ The Engineer's Guide to Success ”—200 courses—free— Associated Equipment, with facilities for which gives particulars of the first-class training supplied practical demonstration under the super­ by the T.LG.B. for the A.M.I.E.E.. A.M.Inst.C.E.. vision of their skilled Engineering Staff. A.M.I.Mech.E.. A.F.R.Ae.S.. A.M.I.P.E., B.Sc.(Eng.), To give a most comprehensive show, the C. & G.. etc.. examinations in which TT.G.B. home-study company invites other interested Manufac­ students have gained 44 FIRST PLACES AND OVER turers having no London showrooms to 1.000 PASSES. The Guide covers careers in all branches. exhibit their products, free of charge. For Electrical. Mechanical. Radio, Aeronautical, etc. farther details please communicate with— ** Exhibition.” Box *2950. c/o The Electrical THE TECHNOLOGICAL INSTITUTE OF Review. GREAT BRITAIN. 35. TEMPLE BAR HOUSE. 56 E l e c t r i c a l R e v i e w October 5, 1945

PAGE Index to Advertisers Dorman Sc Sm ith Ltd...... 20 Drayton Regulator & Instrument Co. Ltd...... 78 PAGE D ry den, Thomas, & Sons L td ...... 84 Aberdare Cables Ltd...... Cover iv Duratube & Wire Ltd...... 82 Aidas Electric Ltd...... 70 Edison Swan Electric Co. L td ...... 63 Airscrew Co. Ltd...... 39 Electric Construction Co. Ltd...... 28 Albion Clay Co. Ltd...... 70 Electrical Sc General Accessories (Leicester) Ltd 58 Astor Boisselier Sc Lawrence Ltd...... 26 E. & M. Developments Ltd...... 66 Automatic Coil Winder Sc ElecL Equipment Co. Ltd. 32 Erg Resistors Ltd...... 62 Babcock & Wïlcox Ltd...... 38 Evans Lifts Ltd...... 83 Banner Electric Co. Ltd...... 58 Everett Edgcumbe Sc C o . L td ...... 40 Belling Sc C o. Ltd...... r ...... 12 Ferranti Ltd...... 11&25 Black Sc Decker L td ...... 77 Fischer Bearings Co. Ltd...... 42 Braithwaite & Co. Engineers Ltd ...... C over ii Geipel, William, Ltd...... 76 British Aero Components Ltd...... 18 General Electric Co. Ltd...... 44 British Mica Co. Ltd...... 78 General Rewinds Sc Engineering Co...... 66 British Power Transformer Co. Ltd...... 24 Gent & Co. Ltd...... 29 British Thomson-Houston Co. Ltd ...... Cover i Sc 5 Glover, W. T.. Sc C o. Ltd...... 10 Burgess Products Co. Ltd...... 79 Grelco Ltd...... 82 Burt, Boulton & Haywood Ltd...... 76 Hague Sc McKenzie Ltd...... 60 Cable Makers’ Association...... 36 Hammond Sc Champness L td ...... 32 Carter, H. W., Sc James Ltd...... 64 Heatrae Ltd...... i Churchouse, C. M.. Ltd...... 80 Henley's. W. T., Telegraph Works Co. Ltd...... 13 City Electrical C o...... 58 Hewdttic Electric Co. L td ...... 65 Clifton Aircraft Ltd...... 82 Higgs Motors Ltd...... 15 Compound Electro Metals Ltd...... 82 H-M.V. Electric Household Appliances...... 72 Connolly’s (Blackley) Ltd...... 81 Hopkinsons Ltd...... 57 Constructors Ltd...... 26 Howells (Electric Motors) Ltd Cover Hi Corrugated Packing & Sheet Metal Co. Ltd...... 80 Hunt, A. HL, Ltd...... _*...... 32 Cox-Walkers Ltd...... 64 Crompton Parkinson Ltd 6, 19 & 73 Igranie Electric Co. Ltd...... 16 Crossland, R. & A. G ...... 72 loco L td ...... ; ...... 34 Crypton Equipment Ltd...... 22 Jones. Samuel, & Co. Ltd ...... 26 Cryselco Ltd...... 30 Kidde. Walter, Co. Ltd ...... 56 Curtis Manufacturing Co. Ltd...... 78 Lancashire Cables Ltd...... 64 Dalyte Electric Co. Ltd...... 84 Legg (Industries) Ltd...... 80 Davidson & Co. Ltd...... 27 Litholite Insulators Sc St. Albans Mouldings L td . 56 Davis & Timmins Ltd...... 84 Liverpool Electric Cable Co. Ltd...... 14 Desoutter Bros. Ltd...... 3 D onovan Electrical Co. Ltd...... 84 ( Cominued on page 58)

L ittid H ito c THE LUX wAY 4 - 0 y & u J u s TO VICTORY OVER FIRES P t o u d t i c The Electrical industry has proved LU X efficiency, safety and certainty in action. Complete A l& ictcli n o Fire protection, without mess o (7

LITHOLITE INSULATORS & ST. ALBANS M OULDINGS LTD WATFORD THE WALTER KIDDE CO.LTD. LUX WORKS BELVUE RD_ ’PHONE: WATFORP 4494 NORTHOLT. MIDDSX. O c to b ers, 1945 E l e c t r ic a l R e v ie w 5 7 THE IDEAL DRAIN VALVE

Meets ail requirements for a robust, easily oper­ ated valve which remains leak-proof at higher press­ ures and for longer periods than any other type of valve. Sizes up to Ij in. bore. HOPKINSONS’ UNIFLOW’SLIDE VALVE HOPKINSONS LIMITED • HUDDERSFIELD London Office : 34 Norfolk Street, Strand, W .C.2

ZENITH ( r e o d . t r a d e - m a r k )

Improved Type CERAMIC EMBEDDED RESISTORS

of the highest quality, complying with all Government Specifications

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

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

Phone : WILIesden 4087-6-9 G ram s : " Voltaohm, Phone, London 58 E l e c t r i c a l R e v ie w October 5, 1945

Index to Advertisers MANUFACTURERS OF (Continued from page 56) page London Electric Firm ...... 80 CONDUIT London Electrical Co. (Blackfriars) Ltd...... 67 Macpherson, Donald, &. C o. Ltd...... 79 FITTINGS Matthews & Yates Ltd...... 62 McGregor. Robert, & Co ...... 74 INDUSTRIAL and M .CJL & Repetition Ltd...... I WATERTIGHT Metalastik Ltd ...... 17 W E L L G LASS Metropolitan-Vickers Electrical Co. Ltd 37 & 71 FITTING S and Metway Electrical Industries Ltd...... 78 ACCESSORIES. Midland Electric Mfg. Co. Ltd...... 33 DOMESTIC Ministry o f Fuel and Power...... 69 LIGHTI NG. M.K. Electric Ltd...... 75 HAND LAMPS H .0 . T Y P E T A B L E and F L O O R Morris Heating Appliances Ltd...... 74 L A M P S . Mulcare, Messer & Co. Ltd...... 72 com plete with Lampholder, Glass D O M E S T I C Nalder Bros. & Thompson Ltd...... 35 and strong Gal­ ELECTRICAL Newman Motors...... 68 vanised Guard, APPLIANCES. Non-Ferrous Die Casting Co. Ltd...... 32 Wood Handle, B A T T E R T Ebonite finished. Parmiter, Hope & Sugden Ltd...... 59 C H A R G I N G Parsons, C. A., & Co. Ltd...... 23 EQUIPMENT. P. & B. Engineering Co. Ltd...... 76 Petbow Ltd...... 34 HAND LAMPS Pope's Electric Lamp Co. Ltd...... 2 O F A L L Premier Electric Heaters Ltd...... 4 DESCRIPTIONS. Pultra L td...... 81 Radcliffe, Henry, & Co. Ltd...... 64 Ratcliffe. F. S., (Rochdale) Ltd...... 72 Record Electrical Co. Ltd...... 80 Reyrolle, A., & Co. Ltd...... 31 Richardsons Westgarth-Brown Boveri Ltd...... 20 f Ross Courtney & Co. Ltd...... 1 Rotherham & Sons Ltd...... 66 Sanders, Wm., & Co. (Wednesbury) Ltd...... 8 ELECTRICAL & GENERAL ACCESSORIES Savage Transformers Ltd...... 74 Scholes, George H.. & Co. Ltd...... 83 (Leicester) LTD. Scott, Hugh J.. & Co. (Belfast) Ltd...... 62 NEWHALL STREET, BIRMINGHAM 3 Sheffield Smelting Co. Ltd...... 60 Siemens Brothers & Co. Ltd...... 9 Telegrams : Elgenic, Birmingham Simmonds Aerocessories Ltd...... 43 Sims, F. D., Ltd...... 78 Standard Telephones & Cables Ltd...... 61 Stone, W. H., & Co. (Cardiff) Ltd...... 74 SAVE TIME Coil* tested for short Sturtevant Engineering Co. Ltd...... 7 or open circuits Sutcliffe Speakman & Co. Ltd...... 59 in 5 seconds Thew, Edward H., Ltd...... 84 with the Torm o Ltd...... 60 Tobe Products Ltd...... 21 Tucker, Geo., Eyelet Co. Ltd...... 74 Banner Coil Tester Variey M agnet C o...... 66 Patent No. 4805'44 Veritys Ltd...... 41 Meter Indication. Detects single turn shorts. Ward & Goldstone Ltd...... 75 Wardle Engineering Co. Ltd...... Cover iii Welwyn Electrical Laboratories Ltd...... 82 THE BANNER ELECTRIC CO. LTD. Westminster Engineering Co. Ltd...... 1 I HODDESDON - - . HERTS Westool Ltd...... 58 I Wilcox, Edward, & Co. Ltd...... 26 Hoddesdon 2659 Zenith Electric Co. Ltd...... 57 Makers of TRANSFORMERS. CHOKES, RELAYS, etc-

LET wESTOOl HELP WITH YOUR POST-WAR PROBLEMS ON ALL Electro-Mechanical Apparatus Solenoids and Electro-Mag nets FOR TECHNICAL ADVICE. W R IT E :—

W ESTOOL Ltd. . ^____ Telephone : Westool Works PUTNEY Putney, S.W.15 ^ 4281/2 3 5 HiSh breaking capacity fusegear. ¡§® Ironclad distribution boards. IANQi Fuse-switches and isolating switches. m , fiT House service cut-outs. Kltt ^ Unit type switchboards, etc.

PARMITER, HOPE & SUGDEN LTD. Longsight, Manchester 12. London : 34 Victoria Street, S.W.I ¡HAN! ------

* lltt ran tif COPPER lio n LU PRESSINGS (EKTS OF EVERY DESCRIPTION F O R T H E ELECTRICAL INDUSTRY «As W e can supply pressings only or pressings machined to customers requirements

m SUTCLIFFE iratus SPEAKMAN A N D C O M P A N Y L IM IT E D ¡net! LEIGH - LANCASHIRE London Office: 82 King William >pho«; 0 0 60 E l e c t r i c a l R e v ie w October 5, 1945 TURNED PARTS A REMINDER — a n d a

W a r n i n g . . .

Before the war we constantly urged the necessity for specially constructed aluminium uten­ sils for electric cooking. Very many Supply Authorities BOLTS AND SETSCREWS followed our advice, installed NUTS, STUDS, ETC. PYRAM ID utensils and during the war years have reaped a STANDARD SIZES FROM STOCK rich reward in the trouble-free service they and their con­ sumers have received. T O R M O LTD . ENDERSLEIGH GARDENS. WATFORD WAY Aluminium utensils are now being made again—and by a few HENDON, LONDON, N.W.4 who never made them before. T e le g ra m s: " FRAMING, HEND. LONDON " Telephone : HENDON 7446-7 It is vital to remember there­ fore that having a flat bottom . does not make a special utensil. Distortion will positively and inevitably follow unless the sides and base of the utensil are in the correct proportions. With PYRAMID Aluminium U te n s ils y o u d o k n o w p re c ise ly where you are—they are made A N D GUARANTEED to avoid any distortion. D on’t be misled; don’t let your consumers be misled.

s i w k k Aluminium Utensils specially constructed for Electric Cooking SHEFFIELDCOMPANY LIMITEDSMELTING SHEFFIELD • LONDON • BIRMINGHAM ESTABLISHED !7<>0 Hague & McKenzie, ltd., Birmingham, x CONTRACTONS TO THE ADMIRALTY. MINISTRY O ' S’JPPl r AND MINISTRY OF AIRCRAFT PRODUCTION . APPROVED AIR MINISTRY TEST HOuSfc

RP-488 uctober 5 , 1945 E l e c t r ic a l R e v ie w fil

d o t i n g

“ T H IS unit suffered in the 1940 Blitz on London. It was controlling street bollard lighting at the time and was still electrically sound afterwards.

W e do not recommend the treatment, however, but we do recommend our very robust street lighting control system to your urgent attention.

Full details will gladly be sent on request.

STREET LIGHTING CONTROL SYSTEMS

Advertisement o f Standard Telephones and Cables Limited, New Southgate, London, NA\ 62 E l e c t r i c a l R e v ie w October 5, 1945

• A.C. MOTORS 1-250 B.H .P. • ALTERN ATO RS 1-125 K.V.A . OF NORTHERN IRELAND • D.C. MOTORS 1-200 B.H .P. • GENERATORS 1-130 K .W . 0 W e can despatch ex stock 3-phase • MARINE MOTORS • MOTOR GENERATOR SETS squirrel cage motors up to 23 B.H-P. • IN VERTED RO TA RY CONVERTERS • LOOM MOTORS, etc. HUGH J. SCOTT t CO(BELFAST) LTD. VILT «IRKS . BELFAST. I . I RE LARD.

It isn’t ...... isn’t what? Isn’t a watt ! It’s the c.g.s. unit of energy. W H A T ’S “ERG”? ERG is the trade mark that will identify our products of quality— small parts for big jobs. MATTHEWS & YATES ERG Heating and Ventilating Engineers LTD RESISTORS L T D . SWINTON (Manchester) & LONDON TeL: SWlnlon 8X73 (4£m«). LOiDOS, Chsncerj 7823 1021a, FINCHLEY ROAD GLASGOW - LEEDS * BIRMINGHAM * CARI LONDON. N.W.II V ' M l Technical Data supplied an queerg ref. ER 10 Phone : Speedwell 6967 w to b e r 5, 1 9 4 5 E l e c t r ic a l R e v ie w 6 3

m u /

ROYAL II EDISWAN II LAMPS

THE EDISON SWAN ELECTRIC CO. LTD. 155 CHARING CROSS RD.. LONDON. W.C.2 3 T ASPOtNTWENT (L.65) 64 E l e c t r ic a l R e v ie w October 5, 1 9 4 5

IH ALL '/¡AUTO PRODUCTS MITAIS

AUTOMATIC VOLTAGE, A.G FEEDER SPEED AND OTHER REGULATORS

COX=WALKERS LTD. m COXPAR DARLINGTON H.T.<.

PAPER INSULATED LEAD COVERE D ARM O.U RED F O R P R E S S U R E S U P T O 11,000 V O L T S WIRE GUARDS HANDLES LANCASHIRE CABLES LTD., WARRINGTON, LANCS. Controlled by Sterling Cable Co. Ltd., Enfield, Middx., BASKETS specialising in all types of Rubber, Synthetic Rubber and BALSALL HEATH WIREWORKS Thermo-Plastic Insulated Cables and Flexibles ■Wirin^^S'ham 'BIRMINGHAM 12 C alcPho°pVl733 October 5, 1 9 4 5 E l e c t r ic a l R e v ie w 6 5 A.C. TO D.C. CONVERSION

TH E demand for HEWITTIC glass bulb RECTIFIERS, simplest, most reliable of all converting plant, has con­ stantly increased. It is today, as it has always , been, the most modern choice in recti­ fier equipment — for every application, small or large, from battery charging up to the operation of D.C. indus­ trial plant & traction systems.

HEWITTIC ELECTRIC CO. LTD., WALTON-ON-THAMES, SURREY Telephone :lWalton-on-Thames 760 (8 lines). Telegrams: “ Hewittic, Walton-on-Thames " 66 E l e c t r i c a l R e v i e w October 5, 1945

DETERMINES THE IQ I L perform ance

instrument PARLEY ^ 4 de

CLOCKS + A CCU R A CY * UNIFORMITY i f RELIABILITY i f SERVICE bi|ity that Rotherhams have un • rp 1750 Now, as then, i f COMPETITIVE PRICES taken since 1/W- T lir ns the electrical industry tu ns EXPRESS DELIVERIES DAILY IN LONDON AREA

a with complete instinctively an The VARLEY MAGNET COMPANY rHpnce to Rotherham for all BLOOMFIELD ROAD confidence n kinds of small part P WOOIwftk^422i6linu) WOOLWICH,S.E.18 if you have spec.al instrum ents. 7 requirements please consult us. C apstan C A P A C I T Y AVAILABLE U P T O M’ BAR AND 6' DIAMETER CHUCKING Send prints for quotations to GENERAL REWINDS & ENGINEERING CO. ^ Bentley Heath, Knowle, BIRMINGHAM J

CERAMIC, MICA and SYNTHETIC RESIN ELECTRICAL COMPONENTS M ETALLISED Manufacturers of “ SO LD RU X '* Paste Solder. Non-Corrosive E. & M. DEVELOPMENTS LTD. 492 Ipswich Road, Slough, Bucks T e l. : S lou gh 21435 October 5, 1945 E l e c t r ic a l R e v ie w 67

L

£ ^ O l e s

LONDON ELECTRICAL C0MPANY(Bl«KFRI»RS)LTD WATERLOO 5620 LONDON * S E-I 6 8 E l e c t r i c a l R e v ie w October 5, 1945

All Newman Motors are totally enclosed against dust, dirt and moisture. Ball-bearings provided with greasegun lubrication. Three Points which will save you many man-hours of maintenance during their long trouble-free life. Delivery from stock.

Head Sales Office : 32 VICTORIA ST., LONDON, S.W.I. Abbey 2023 O c to b e r 5,1945 Electrical Review (Supplement) 69 Control temperature and

Sound, lieat-saving suggestions

There are two main ways of saving heat—and fuel: (1) don't apply to a job any more heat than it needs, and (2) prevent heat from getting away unused. • The solution for (1) is often thermostatic control, and for (2) proper insulation of all hot surfaces. On both subjects first-class advice is given in the following Bulletins written by experts for your help and guidance :

THERMOSTATIC CONTROL FOR HOT WATER HEAT INSULATION (LAGGING) 4ND STEAM (Bulletin No. 11) (Bulletin No. 2) Describes the various methods of A concise reference-book on automatic temperature control and lagging materials and the effective their application in central heat­ heat insulation of steam and hot- ing, hot water supply, process heating, engine cooling (and waste water pipes, boilers, economisers, heat recovery), steam production. calorifiers, cylinders and steam For the best results in fuel saving, chests and other steam spaces. correct choice of the control method for the particular purpose INSULATION OF FURNACES is essential. The Bulletin will guide (Bulletin No. 17) you in making that choice. The loss of heat from an uninsu­ THERMAL INSULATION OF BUILDINGS lated, or badly insulated, furnace (Bulletin No. 12) may be more than 20%. Proper Here, in condensed form, is a insulation may reduce this loss to complete guide to the insulation less than 5%, resulting in a fuel of rooms and buildings to prevent excessive loss of heat. saving of 15%.

THESE BULLETINS are in every sense practical. They provide specialist information for the managing executive and the man on the job. Copies are free from your Regional Office of the Ministry of Fuel and Power.

ISSUED BY THE MINISTRY OF FUEL AND POWER

G 70 (Supplement) E l e c t r i c a l R e v ie w uctnner 3 , iv 4 3

ORIGINAL MANUFACTURERS OF

SALT-GLAZED STONEWARE SELF-ALIGNING SINGLE & MULTIPLE WAY

Also

Rectangular Troughing and

Glazed Bridge Insulators

For Underground Electrical Cables i v n d u i t s PROMPT DELIVERY ALBION CLAY COMPANY LIMITED HEAD OFFICE: ALBION WORKS, WOODVILLE, Nr. BURTON-ON-TRENT Telephone : Swadlincote 7278 (3 lines) Telegrams : " Albion, Phone, Woodville ”

SADIA TYPE U.D.B. in action cuts WORK, COSTS Sadia Type U.D.B. Electric Water Heater has been designed specially for the post-war HERE IS PROOF home; exhaustive practical tests have been In independent tests a carried out, proving it to be the most eco­ 20-gallon U.D.B. provided nomical no-work hot water provider ever all the hot water for a produced. Even when serving a hard-water family of eight people in­ supply, no maintenance is necessary and cluding three children for there is never need for washer replacement an average consumption . . . the Sadia Type U.D.B. never drips. of 62 units per week. A 15-gallon U.D.B. provided Here is a completely automatic hot water a family of four people in­ system for the small house. Occupies the cluding two children for smallest space under the draining board or an average consumption in kitchen cupboard. Really two heaters of 29 units per week. This in one, it can be used as a system in works out at under eight itself or as an alternative to an existing solid units of electricity per fuel boiler . . . in either case working person per week for all hot water requirements: at 92% efficiency. Further particulars on at Jd . per unit this cost9 request. 4d. per person per week.

AIDAS ELECTRIC Ltd., Sadia Works, Rowdell Rd.. Northolt, Middlesex. P h on e: W AX low 1607.

Scottish yd gents : W. Brown & Co. (Engineers) Ltd.. 89, Douglas Street, Glasgow, C.2. October 5 , 1 9 4 5 E l e c t r ic a l R e v ie w {Supplement) 71

Workshop lighting should be a model of efficiency, and the pattern-shop illustrated is an excellent example of what a well-lit workshop should be. Whatever the lighting problem in your factory, Metrovick Illuminating Engineers will solve it for you.

METROVICK COSMOS LAMPS 72 (Supplement) E l e c t r i c a l R e v ie w October 5, 1945 CROSSLAND - specialists

i n t h e

m anufacture & desiqn of

i n d u s t r i a l & com m ercial

i i q h t i n q

f i t t i n q s f l o o d

l a n t e r n s

& s t r e e t a / / ? ; t i q h t i n q

equipm ent a

R.& A.G. CROSSLAND PRICE ST. BIRMINGHAM 4. 7ê/J»STonCross 1138/9

U l lt\M W / ELECTRIC HOUSEHOLD APPLIANCES y& K fdélifâe (10CIIALE) LTD 1 A.I.D ŁA U L 2 1 V LA' ~ v G RAW F 0 R 0 SPRING WORKS f U L L Y ROCHDALE, LANCS.Phone.24?4 | APPROVED.! E V £ tty s p u m e a soupce op /psp/pat/op IRONS • FIRES • KETTLES REFRIGERATORS • HOT PLATES Strewed Rod AND WASHING MACHINES ALLTHREAD STUDS STEEL B R A S S A N D COPPER

M u l c a r e , M e s s e r LTD. HATFIELD ROAD, S t . ALBANS V* T e l e p h o n e 1201 ÜMPTO' Aphone October 5, 1945 E l e c t r i c a l R e v ie w (Supplement) 73

FOR SHIP WIRING...

"ALL'S WELL” WHEN ITS CRomPTon CABLES i

«0 i ¡(0 Li» UH CROMPTON PARKINSON LIMITED, ELECTRA HOUSE, VICTORIA EMBANKMENT, LONDON, W.C.2 Telephone: TCMple Bar 5911 Telegrams: Crompark, Estrand, London 74 {Supplement) E l e c t r i c a l R e v ie w October 5, 1945

EYELETS W CONNECTIONS J u d * *

Equip1" "

Specialists in FLUORESCENT, MERCURY and SODIUM LIGHTING

Phone : W.H. STOKE (Western) ltd. Bristol 57 REDCLIFFE HILL, BRISTOL 1 20760 Phone : W.l ST01E&(o.((irdiff) Ltd. Cardiff 6 5 7 6 TUCKER EYELET 16&17 HILLS TERRACE, CARDIFF 6 5 7 7 COMPANY On Ministry of Supply, Ministry of Aircrafi Walsall Road * Birmingham 2 2 T elephone:-BIR C H FI ELDS 5 0 2 4 (6 lines) Production, Admiralty Lists, etc. Teleqroms -'EYELETS, BIRMINGHAM" 'Phone: Molesey 556/ Savage TRANSFORMERS MILD STEEL M o d i t o M e a s u r e " CABLE HANGERS AND RACKS. Built to do a maximum job in a minimum space. Robust, long ROBERT McGREGOR & Co., lived, precise in performance. ALPINE STEEL WORKS. EAST MOLESEY. SURREY. SAVAGE TRANSFORMERS LTD. 50, Northgate St., Devizes, Wilts. D e v iz e s 536

■f

^H ie % lecJjVLCCL¿'ff^ vcu cle

2o-: October 5, 1945 E l e c t r i c a l R e v ie w (Supplement) 7 5

This illustration shows h U W Ü l ta C l a W. & G. “ G.P.O.” Pattern Handlamp, one SX xw idG iA d ./ of many types of insu­ lated Handlamps sup­ plied with and without switch holder.

A comprehensive range of Inspection Lamps, including Barrel Inspec­ tion Lamps, in addition to a wide variety of electrical accessories, is available for Essential Requirements.

WARD&GOLDSTONE Ltd. P e n d le t o n . M a n c h e s t e r . 6 . ESTABLISHED OVER HALF A CtNTURY

9th November FOR THE E. I. B. A. M.K. ELECTRIC LTD. VICTORY BALL EDMONTON N.I8 76 (Supplem ent) E l e c t r i c a l R e v ie w October 5, 1945

P & B-GOLDS THERMAL OVERLOAD RELAY FOR THREE-PHASE MOTORS

A ccu rate and close protection against overloads and phase failure at all loads. Fully compensated for high and low ambient temperatures M A K E R S O F MAXIMUM DEMAND INDICATORS ENGINEERING- Co. L ro.

m TAMWORTH LANE WORKS, MITCHAM, SURREY ,

CREOSOTED POLE for POWER LINES Telegraph Poles, Engineering and Constructional Timbers of Every Description. BURT. BOULTON & HAYWOOD Ltd BRETTENHAM HOUSE, WELLINGTON STREET, W.C.2 D e p o t s : LONDON I Telephone, Temole Bor 5 8 0 /(5/ines) Te/eorams. Burbout. Rand. L o n d o n Newport.Southam pton Et

Telegrams: “ Patella, Sedist, London.” Telephone : Hop 0594 (3 lines)

CABLE bla V.I.R. & THERMOPLASTIC, BRAIDED, LEAD COVERED & SHEATHED THC SERVI! |*||| I I AM GE IP EL LTD Head Office: 156-170 Bermondsey Street, LONDON, S.E.1 TVILblHm U l.ll kk I. IV. Cable Works : WEMBLEY, MIDDLESEX 5 , 1 9 4 5 October E l e c t r i c a l R e m e w (Supplement ) 7 7

m t u l C S e c J k e PORTABLE ELECTRIC TOOLS FOR ALL INDUSTRIES

Every B & D Nut Runner which speeds its way through heavy duty production work is helping you to reach the new horizon. But once there, you must be ready to travel beyond, straight into post-war industry. When the time comes you will need the power, speed and efficiency of B & D Portable Electric Tools. Plan ahead, to use them for “ tomorrow.”

B G? D Nut Runner BLACK & DECKER LTD • HARMONDSWORTH • MIDDX •PHONE : WEST DRAYTON 268! 6. 'GRAMS : “ BLACDECK," WEST DRAYTON SERVICE STATIO N S- LOUDON ' EIRM1NGHAM ■ BRISTOL - GLASGOW - LE E D S ■ MANCHESTER ■ NOTTINGHAM 78 (Supplement) E l e c t r i c a l R e v ie w October 5, 1945

66 H e t w a y ” CHINA CONNECTORS

5 and 15 amp. INSULATED I, 2 and WIRES AND 3-way STRIP

Send for List COVERED WITH ENAMEL COTTON No. NC30 E.R. SILK VARNISH GLASS ENAMEL AND PAPER

Ask for details of all Metway Porcelain and China Products Samples and Prices on Application M A D E BY

■METWAY ■ I- ■ « I INDUSTRIESELECTR,CAL LTD. (Formerly Metropolitan Electric Supplies) F. D. SIMS LTD. KING STREET, BRIGHTON, I HAZELHUR8T WORKS. RAM8B0TT0M, LANCS. Phone:Brighton4456PBX. Grams:"Metway,” Phone,Brighton Telegrams : Telephone : "SIMS. RAMSBOTTOM " RAMSBOTTOM 72I3IA SMALL GEARED WE ARE NOW ABLE MOTOR UNITS TO WELCOME BUSINESS ENQUIRIES Made Unidirec­ tional and Re­ v e r sin g . For 35 years we Regd. Trade Mark Unidirectional— have specialised for “CELEC” Torque 36*5" lbs. in resistances RESISTANCES & DIMMERS at 1 r.p.m. fo r : R ev e r sin g — 60" REGULATING During the war we have had lbs. at 1 r.p.m. CHARGING to concentrate on Govern­ Enquiries are solicited. D/MM/NG ment orders, but the time TESTING DRAYTON REGULATOR WELDING is coming very shortly when & INSTRUMENT CO. LTD. West Drayton Middlesex PLATING we hope to resume contact FURNACE with our valued pre-war CONTROL ARTIFICIAL business friends, whose LOADS enquiries for prototypes SPEED CONTROL for post-war work we shall EARTHING SLIDING welcome.

BOBBINS CURTIS AND THE CURTIS MANUFACTURING Co., Ltd. WASHERS 26-28 Paddenswick Road, Hammersmith London, W.6 BRITISH MICA C ° L TD• BEDFORD Telephone : RIVERSIDE 4456______October 5, 1945 E l e c t r ic a l R e v ie w (Supplement) 79

,u b > e t * e M >

It’s EASY to telephone C c M S u l i in this ACOUSTI-BOOTH

Put your shop phones In Burgess Acousti- booths and you’ll be able to hear clearly in m a m t e spite of nearby noise.

There are no doors because no doors are needed. Patented sound-absorbing walls 'P rccessia q , soak up factory noise and provide a “ zone of silence ” for easy telephoning. M e c h a n i c a l Open construction makes these booths easy to keep clean and obviates any H andiinqa a d ventilation problem. Hundreds of these doorless booths are In constant use in all types of factories. W rite for Bulletin i n f r a " R e d BP.I3I/E.R. BURGESS Siovinq-éc.... ACOUSTI-BOOTH BURGESS PRODUCTS CO. LTD. Vine Finishes Acoustical Division, HINCKLEY, LEICS. Phone : Hinckley 700 (3 lines) London Office : 72 Horseferry Road, S.W.I DONALD MACPHERSON & CO. LTD. Phone : ABBey 1868 Scottish Representatives : ALBION STREET, MANCHESTER 1 R. McCartney & Co., 142 Queen Street, Glasgow, C.i and MITCHAM, LONDON 80 (Supplement) E l e c t r i c a l R e v ie w October 5, 1945

¡M et' ‘U ü ta éSù ïtU Û lid

i î h TM c u a k

‘MINOR’ TEST SET FOR INSULATION TESTING

You could not have a more reliable or more con­ venient test set than the “ Record Minor.” Made t with the high “ Record ” precision, this compact A keta, Taylor’» Corrugated Packing, unit gives direct and dead accurate readings inde­ Copper Jointe and W ashers, Com ­ pendent of voltage variation. The case is of pressed Asbestos Jointings, Shims, reinforced bakdrte, size 5*' X 3£* X 3 | ', w ith and Kinghorn Type Metallic Valves, tabwashers to specifications. dear open scale 5,000 ohms to 20 megohms. Weight only 3 lb. Height allows full swing of Write for Brochure handle. A free handle is fitted to prevent the generator being turned in the reverse direction. RECORD ELECTRICAL CO. LTD. BROADHEATH ALTRINCHAM • CHESHIRE Tel.: Altrincham 3221/Z2. G n m i: "Infusion.” Altrincham AND SHEET METAL CO. LTD. London Office : 28. Victoria Street, S.W .I. GATESHEAD - ON- TYNE

'Direct-O-life ' \Wm) (INDUSTRIES) £ t d . C.M.CHURCHOUSE LTD . I L u û / j û W ILLIAM SON ST, CLARENDON WORKS .C l AS ENDOW CROSS. LOW DON .WII. r ^ y | l & l I WOLVERHAMPTON, PAW 8617-8 T ^ , | . r a ; T rrE E im S N O T A iO r 5 . 1 945 October E l e c t r ic a l R e v ie w (Supplement) 81

WAR EMERGENCY LIMPET ADHESIVE TAPE To meet the shortage of rubber we have temporarily ceased manufacture of the famous “ Blackley,” “ Limpet” and “ Jockey ” tapes and in their^place is introduced a “ W ar Emergency Lim pet” tape, which will meet all the exacting requirements of B.S.S. 1078-42 consistent with the lowest possible consumption of rubber. This tape represents the highest quality which can now be manufactured. It is sold only on a yardage basis in }" and I' widths. In rolls of 50-yds., 25-yds. and 10-yds. W e shall be pleased to furnish prices, technical data, etc., on application. CONNOLLY S (BLACKLEY) LTD., MANCHESTER 9 Telephone : Cheetham Hill 1801 (3 lines) Telegrams: “ Connollys, Blackley." London Office: OSW ALDESTRE HOUSE, STRAND. W.C.2 Telephone : TEMple Bar 5506-7 Telegrams : " Syllonnoc, Estrand, London." 0 o 1 t t 1 J¿ L I r £ HESTER L A T H E S MODERN SMALL PRECISION BENCH LATHES

WATCH. CLOCK AND INSTRUMENT WORK

METER TEST ROOM AND REPAIR WORK, ETC. We are always ready to advise upon the adaptation of Puitra Lathes to meet Puitra Micro Lathe Model EU-45 special requirements. ^ E * e n t r e H e ig h t SC mm Spindle Bcre 10 mm Purchase restrictions are now Cneed fiance -00 r p ~ to 6.000 r.p.m. for motorised model lifted and we can supply. B-it-sh M ad e t c highest-International Standards Write for Catalogue CM many accessories available PULTRA LTD. 24.6RAVELLANE, SALFORD 3. MANCHESTER 'Phone BLA.9/8/.J 8 2 {Supplement) E l e c t r i c a l R e v ie w October 5 , 1 9 4 5 E L M E T S gcts

COPELMET (Copper-tungsten)

and SILVELMET (Silver-tungsten) For Switchgear and Circuit-breakers operating in air or under oil. W rite ; COMPOUND ELECTRO METALS LTD. CLIFTON AIRCRAFT LT.° • IYTHAM LANCS. o r r i n g : A B B E Y 193» 42 P A L L M A L L , S .W .I

Grelco “ No property of the resistance presented any apparent alteration.” Such is the report of an MULTI-PLUG independent laboratory, after testing a Welwyn Vitreous Resistor for 670 hours (nearly a month) ADAPTORS at continuous double load. (Normal load gives working temperature of 450° C.). All Welwyn resistors, of every size and for every purpose, are ELEVEN TYPES built to the same high standard: 1 W to 300 W. Welwyn High Stability Carbon Resistors: 1 /4 Fully illustrated descrip­ to 2 W . jyew catai0gUe now available for Trade. Design tive folder on application WELWYN ELECTRICAL LABORATORIES LTD WELWYN GARDEN CITY, HERTS GRELCO Ltd., Grelco Works, Hopcott, Minehead, Somerset Phone: Welwyn Garden 3816-8 ^ tuner 0,1945 E lectrical Review (Supplement) 8 3

30 amp switch 30 and 60-AMP D.P. SWITCHES • WHY SO SMALL? W hy not, if it packs just as much punch as a larger Switch ? — This NEW “W YLEX” product, ------to control A.C., is O revolutionary in de- ■ Price List sign ; robust and I , ,, stu rd y ; modern in- I i ,adlY sent side and out. Now I on request. ready for delivery, ____ WYLEX of WYTHENSHAWE MANCHESTER George H. Scholes & Co. Ltd.

, 84 (Supplement) E l e c t r ic a l R e v ie w October 5, 1945

CABLE REELING DRUMS The illustration shows a power driven cable reeling drum, with motor, control gear, limiting device and brake, com­ plete w ith 425 ft. 4-core l i " o.d. flexible cable, for use with Well pumps, etc. There is a D e co Reeling drum for every need. W rite for new brochure. ENGRAVED BRASS, CAST BRASS AND ALUMINIUM, ENAMELLED BRONZE AND CHEMICALLY ENGRAVED PLATES OF ALL TYPES IN ALL LANGUAGES MANU­ FACTURED BY THE EMPIRE'S LARGEST GENERAL ENGRAVERS. SAMPLES AND QUOTATIONS ON R E Q U E ST . EDWARD H. THEW LIMITED. 11, Dean Street Newca stle - on - Tyne

Note the tongue which ensures perfect end permanent contact. Easy to fix. Nuts cannot FOR WARMTH turn. All sizes from half to two inches ph o n e THE DONOVAN ELECTRICAL CO. LTD. P R l ST ON BIRMINGHAM 9 Thos DRYDEN i Sons lt d .% 7 7 Electrical Manufacturers and Stockholders FOR CLASSIFIED ADVERTISEMENTS SEE PAGE 45 INDEX TO ADVERTISERS — SEE PAGES 56 AND 58 October 5, 1945 E l e c t r ic a l R e v ie w h i HOWELLS (ELECTRIC MOTORS) LTD. HANLEY, STOKE-ON-TRENT, ENGLAND

' ‘J a n i e s s '

Z f & t a l l y 0 rvcf©4€d

• All sizes \ to 10 h.p. available • No larger than protected*type • Supersede all fan-cooled types

LONDON: Palmers Green 5428 B R IS T O L : 25916 BIRMINGHAM: Central 7909 MANCHESTER: Oidsbury 4709 NEWCASTLE: 28617 STOKE-ON-TRENT: 29624

HORIZONTAL OR VERTICAL MOUNTING FOR LARGE BSS C O N D U IT BOX. WARDLE

WARDLE ENGINEERING CO. LTD. OLD TRAFFORD, MANCHESTER 16 LONDON 34 VICTORIA STREET, S W. I October 5, 1945

O s t v c C h o t

The Q is quality and the P is price. Most cable users want a first-class product without paying through the nose for it. Aberdare quality passes every test of highest British electrical practice. Aberdare Cables are sold at sensible prices. And what does the I stand for? It stands for independence. In normal circumstances, Aberdare don’t have to bend the knee to any trade-imposed restrictions and conditions of sale. Which means that the buyer of Aberdare Cables can keep his knee straight, too. When wartime controls have been withdrawn, QPI again will be the steadfast policy of Aberdare Cables.

ABERDARE CABLES LTD. London Office : Nineteen Woburn Place, W .C.l Independent specialists of paper-insulated cables.