LAURENCE, SCOTT a ELECTROMOTORS LIMITED Electrical Engineers Since 1883
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FURNACE FIRING The L.S.E. RANGE includes : Standard A.C. & D.C. Motors in all enclosures and ratings. Variable speed equipments, A.C. & D.C. Motors for mines, cranes, mill auxiliaries, etc. Marine Motors, electric Cargo Winches, electrical equipment for steering gear. Generators, Alternators, Welding generators. Control Gear. Precision electro mechanical Instruments, etc. L eft: The robust rotor of a medium si%e “T R IS L O T ” motor “ T ltm oi ” The L.S.E. “ T R ISL O T ” high torque squirrel cage motor will do the work of a slip-ring machine in the majority of cases, with the advantages of greater simplicity of motor and control gear. If the application calls for better starting performance than an ordinary squirrel cage motor can provide, ask us what a “ TRISLOT ” will do. “ TRISLOT ” motors are available in a wide range of outputs, and in all standard enclosures and types of mounting. LAURENCE, SCOTT A ELECTROMOTORS LIMITED Electrical Engineers since 1883. Norwich & Manchester E l e c t r ic a l R e v ie w Novem ber 2, 1945 P O ST -W A R reconstruction will call for copper in large quantities. Ample supplies are now available, both for old-established uses and for those resulting from the great war-time advances in technical development. Let copper co-operate in your future plans. W hatever your requirements the C.D.A. will be glad to give you technical information and assistance. COPPER DEVELOPMENT ASSOCIATION A non-trading organization, maintained by the British copper in dustry, to supply information and advice, free to all users of copper Grand Buildings, Trafalgar Square, London, W .C .2 and Kendals Hall, Radlett, Herts London Telephone : Abbey 2677 November 2, 1945 E l e c t r ic a l R e v ie w 1 TD! Lighting MOW ID TWO Thanks to revised regulations, many essential factories not previously able to secure permits for Siemens “ Sieray” Fluorescent Tubular Lighting will now be able to instal this most modern light ing system—and at less cost than before. There is now a choice of two colours of light. The standard Sieray “ Daylight ” Fluorescent Lamp, and the new Sieray “ W arm -W hite” Lamp, produced to meet the need for a softer, warmer illumination. Both types of lamp share all the characteristics of Sieray fluorescent lighting. They give brilliant light without glare, and without interfering shadows. They are approximately three times more efficient than an ordinary gasfilled lamp of comparable wattage. Send for descriptive leaflet. Siemens Lighting engineers are at your service without obligation. Made throughout at SIEMENS Lamp Works, Preston, Lancs. SIEM ENS ELECTRIC LAMPS AND SUPPLIES LIMITED. 38/9 Upper Thames St., London, E.C.4 BRANCHES : BELFAST, BIRMINGHAM, BRISTOL, CARDIFF, DUBLIN, GLASGOW LEEDS LIVERPOOL, MANCHESTER, NEWCASTLE-ON-TYNE, NOTTINGHAM, SHEFFIELD ’ A 2 E l e c t r ic a l R e v ie w N o vem b er 2, 1945 F o b f a / u j e , ECccPUcaC P i ^ j It is noteworthy where Tudor ac whether they were installed only yes cumulators are to be found fulfilling terday, or over thirty years ago as the most important duties. Over 500 many of them were—they are to-day British Power Stations installed functioning with consistent efficiency. Tudor. Many Tudor installations s a f e t y l y t e (Patent No. 313248) rank among the largest in the land is the Tudor Emergency Lighting System, which is automatic and in and have an enviable reputation for stantaneous in operation. It is instal led in thousands of schools3 hospitals, long-lived reliability. No matter factories and other large buildings The Tudor Accumulator Co. Ltd. 50 Grosvenor Gardens, A ccumulators London, S.W .i. SLO ane 0168/9 W T 3 8 b / 4 4 Outwardly one transformer looks very much like another. It’s the unit inside the tank— the nerve centre—upon which real perform ance must be judged. The picture tells the discerning engineer just what he wants to know and shows how reliability is built into N ovem ber 2, 1945 E l e c t r ic a l R e v ie w 3 THE SMALLEST TRIPLE POLE SWITCHFUSE EMINENTLY SUITABLE FOR MACHINE TOOLS (| [D RflDETTE. IOAMPERES. 500VOLTS. CATALOGUE N°Ql438 BILL SWITCHGEAR LTD LONDON A.W.ZELLEY. ASTON LANE, PERRY BARR MANCHESTER GLASGOW ¡fnSSS BIRMINGHAM-20 nJEZTim n L ' ' ' phone emoffiaps son GIWMS/eitSWfTCH B’HAM POPPY DAYm NOV. IO We must not fail the men who gave us Final Victor/. THEIR time of need comes AFTER Service. Please give more generously than ever this year. Sell Poppies too, or send a gift by post-to HAIG’S FUND, RICHMOND, SURREY. On your sympathy depends the British Legion’s work for ex-service men and women of ALL ranks, ALL Services and ALL Wars, their families, and the widows and children of the fallen. Space donated to Haig's Fund by . COLLINS ELECTRICAL LTD. E l e c t r ic a l R e v ie w November 2, 1945 L? N 1924 Bullers made the first big bushing of 06 kV capacity. To-day we are able to show this massive 2 4 2 kV OIL FILLED BUSHING. The porcelain parts were made in Bullers’ works for the British Thomson- Houston Co. Ltd. It measures 15 ft. inches overall and is one of the largest bushing of this kind yet. produced. Only the skill and knowledge acquired by long experience could produce insulatoss of such dimensions free from flaws. How much larger will be called for in years to come, only the future can say, But one thing is certain, whatever the size, Bullers will be ready with their unrivalled resources and experience to cope with the problem. B u l l e r s INSULATOR ANO IRONWORK BULLERS LTD., 6 LAURENCE POUNTNEY HILL LONDON, E.C.4 Telephone : Mansion House 9971 (3 lines) ■y , Telegrams : Bullers, Cannon, London Manchester Office : 196 Deansgate, Manchester N ovem ber 2 , 1945 E l e c t r ic a l R e v ie w 5 B A INDUSTRIAL T-H / ELECTRIC TIMER » I Designed to with stand frequent and ar duous service in indus try, the BTH Timer has ft two ranges, namely from 5 seconds to 5 minutes (in 5 sec. steps) and 20 seconds to 20 minutes (in 20 sec. steps). It is controlled by any form of pilot switch or push button and will give lasting.trouble-free service. Writerr f for■ wi »»V»list «No. * VI V5642-5 V Æ M W 1D nr u ÀB l n RUGBY THE BRITISH THOMSON-HOUSTON COMPANY LIMITED. RUCBY. ENGLAND. A 3566 E l e c t r ic a l R e v ie w Novem ber 2, 1945 for outdoor service Russia. rfBOOK THE 9th NOV. 71 FOR THE E .I.B .& .4 VICTORY BALL. A The working conditions of this B.E.T. 10,000 kVA Transformer will be rigorous. But B.E.T. have built transformers for every condition and clime. During more than 40 years they have learned how best to meet the requirements of every kind of duty — an invaluable asset to be remembered when you are placing your transformer contracts. The British Electric Transformer Company Limited In association with CROMPTON PARKINSON LIMITED ELECTRA HOUSE, VICTORIA EMBANKMENT, LONDON, W C 2 Novem ber 2, 1945 E l e c t r ic a l R e v ie w .WiOUCHOUr ;H( W0R\.« GRINDERS Faster grinding. Less wheel wear per unit of metal removed. Economv in abrasive wheels. •w p ow er cost: The combination of such desirable qualities has made V\\cy£\e Grinders the first choice of grinding .equipment. Sizes are available for all classes of work, i.e., 2 ", 3 ", 4 ", G" and 8'' wheel diam eters, including right-angle m o d els. T h e V\\cyc\e range of machines also includes Drills, Reamers, Tappers, Screwdrivers, Nutrunners, Sanders and Buffers. p m ? AIR COMPRESSORS • PNEUMATIC TOOLS • ELECTRIC TOOLS • DIESEL ENGINES • VACUUM PUMPS CONTRACTORS* EQUIPMENT • ROCK DRILLS • DIAMOND DRILLS • OIL WELL TOOLS Robert Sharp i Partners C 35 8 E l e c t r ic a l R e v ie w Novem ber 2, 1945 POST-WAR BUILDING EFFICIENCY DEPENDS UPON CONSTRUCTIONAL PLANNING f) JL/URING the ‘ speed-building ’ era when war factories were the great constructional problem, RAWLBOLTS played a vital role in the bolt fixings of fitments and machinery . those fixings hold, and will continue to hold so long as they are required to do so. In the days ahead RAWLBOLTS will continue to play their vital part, ensuring in speed of erection, man power economy, efficiency, and neatness of construction. Always Specify RAWLBOLTS for bolt fixings The World’s Largest Manufacturers of Fixing Devices THE RAWLPLUG CO. LTD., CROMWELL ROAD LONDON, S.W.7 B 299 Novem ber 2, 1945 E l e c t r ic a l R e v ie w 9 THE COMPLETE RANGE OF ‘ENGLISH ELECTRIC' TYPE ‘ T ’ HIGH RUPTURING CAPACITY CARTRIDGE FUSE LINKS HAS BEEN A.S.T.A. CERTIFIED FOR, COMPLIANCE WITH B.S.S. 88-1939 CATEGORY OF DUTY 440 AC4 (25,000 kVA at 440 VOLTS) A.S.T.A. RATING RANGE OF CURRENT LIST No. CERTIFICATE No. AMPS. RATINGS AVAILABLE 617 30 TIA 30 2 to 30 Amps. 616 60 TIS 60 35 to 60 Amps. 615 100 TC 100 80 to 100 Amps. 251 200 TF 200 125 to 200 Amps.