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Crompton Switchgear ^ METAL RECOVERY Vol. CXXXVI. No. 3515 APRIL 6, 1945 9d. W E E K LY Crompton POUTECHN* Switchgear ^ CRomPTon PBRKinson LIMITED ELECTRA HOUSE. VICTORIA EMBANKMENT. LONDON. W.C.2 11 E l e c t r ic a l R e v ie w A pril 6 , 1 945 siiE œ FLUORESCENT LAMP 'Jira V a /u istio k crjj G ood jC iq lito n q " Deliveries from Stock for Essential Industrial Installations SIEMENS ELECTRIC LAMPS & SUPPLIES LTD., 38/39 UPPER THAMES STREET, LONDON, E.C.4 April 6, 1945 Electrical Review FLAMEPROOF SWITCHGEAR \ P IS MAINTAINING v ITS REPUTATION FOR DEPENDABILITY UNDER THE SEVEREST WORKING CONDITIONS. FLAMEPROOF CONTROL UNITS FOR HAULAGES UP TO 120 H.P. FLAMEPROOF OIL IMMERSED SWITCHGEAR UP TO 400 AMPS. t ■ if ; ENQUIRIES INVITED £ 'J FOR ALL CLASSES OF SWITCHGEAR. M. & C. SWITCHGEAR LTD. \ ^ / KELVINSIDE WORKS, KIRKINTILLOCH, GLASGOW SALES & SERVICE : OLIVE GROVE RO. SHEFFIELD, 2. LONDON OFFICE ; 36 VICTORIA ST., S.W.I E lectrical Review A pril 6 , 1 9 4 5 ‘‘S a f e t e e ’ CARTRIDGE FUSES. O V E R 50 TYPES AVAILABLE The range of fuses illustrated above gives proof that Weekes are well equipped to L.WEEKES supply fuses to customers’ own requirements. (LUTON) LIMITED Weekes Standard Cartridge Fuses are made WINGATE ROAD, LUTON, BEDS. In ratings up to 500 amps, 600 volts, London Office : 36-38 Kingsway, W.C.2. D.C. or A.C. Telephones : H olborn 1091 ; Luton 278. HAZARDOUS SITUATIONS ! The specially robust construction of PEEBLES FLAM EPROOF MOTORS ensures Jong years of satisfactory performance In addition to safeguarding life and property while operating under hazardous conditions. 100 R.H.P. 3-phase SO cycle 3,000 volt BRUCE • cBLES CO LTD 743 r.p.m. Totally Enclosed Slipping Induction Motor driving an endless ENGINEERS ; BURGh ! rope haulage In a Scottish Coal Mine E MOTOR WITH THE HIGH STRENGTH/WEIGHT Bttm 3622 April 6, 1 945 E l e c t r ic a l R e v ie w 3 V - Made for 30,60.l00.|60.20°.300 ’ * ^ \ \ \ \ .-lO Amp-.. 600 Volts: Double. H jV» y4 VY» neutralrriple and links four pole ancI ^ £ Fitted for Conduit, busbar chamber flange or cable glands. Scuyy W iring, m inim um tlKuntmance LONDON: A W ZELLEY MANCHESTER GLASGOW- 7 3 , GREAT P E T E R ST., BEL FA 5 TBURTON-ONTRENT W E ST M I N S T E R . S.IV.I BILL SWITCHGEAR LTD EXETER SOUTHAMPTON BIRM INGHAM -20 8/RCHFIELDS ■ SOU (4 LINES) AICHO" B I R M I N G H A M KATHANDDE STORAGE BATTERY FOR ALL OTHER FOR ELECTRIC TRACTION PURPOSES STORAGE BATTERIES) The first D.P. battery was introduced in this country in 1888 when it was known as the “ Dujardin- / r / J Plante. ’ ’ Since that date the Company has concentrated on the manufacture of batteries for all purposes with the result that to-day, in the minds of battery users everywhere, the letters D.P. m m m : ( are an assurance of sound Design and efficient ■ U l ; Performance. % e D.P BATTERY C? LTP BAKEWELL. DERBYSHIRE Phone : BAKEWELL 81-82 London Office: 50 GROSVENOR GARDENS, S.W .l. Phone : SLOANE 6255-6 J 150 E l e c t r ic a l R e v ie w April 6 , 1945 //////OVERHEAD LINES TELEPHONE FREDERICK SMITH & C O M P A N Y X nac£S?I RIACKFRIARS IMCOPlOI’ATEO III THE LONDON VLE.p.lC WlPF. COMFANV ANO SMITHS.«-” ' U A 8701181..) ANACONDA WORKS. SALFORD. 3. LANCS MANCHESTER- April 6 , 194 5 E l e c t r ic a l R e v ie w 5 TRADITIONAL RELIABILITY TURBO-ALTERNATORS TURBINE OR MOTOR-DRIVEN COMPRESSORS AND BLOWERS WATER-POWER OR ENGINE-DRIVEN ALTERNATORS AND GENERATORS CONVERTING MACHINERY SWITCHGEAR, TRANSFORMERS, RECTIFIERS AUTOMATIC SUBSTATIONS POWER FACTOR IMPROVEMENT PLANT ELECTRIC WINDERS, ROLLING MILLS ALL KINDS OF HEAVY ELECTRIC PLANT MOTORS AND CONTROL GEAR FOR ANY INDUSTRIAL APPLICATION (large or small) MAGNETOS, AND ELECTRICAL EQUIPMENT FOR AIRCRAFT REGENERATIVE DYNAMOMETER EQUIPMENTS FOR ENGINE TESTING ELECTRIC SHIP PROPULSION ELECTRIC TRACTION (Road or Rail) INDUSTRIAL HEATING EQUIPMENT CINEMA PROJECTOR EQUIPMENT MAZDA LAMPS, AND MAZDALUX LIGHTING EQUIPMENT ELECTRON VALVES of every description • • • SPECIFY BTH ELECTRICAL EQUIPMENT i I BTH THE BRITISH T H O M S O N - H O U S T O N COMPANY LIMITED. RUGBY. ENGLAND A3494 April 6 , 1945 6 E l e c t r i c a l R e v ie w Y c r u s ' B R J L L I A ’A / I f t A ^ t ^ e be^crve yc*^ vf y&us QUESTION If ‘x ’ is your profit on every Ekco Lamp cxrvyXJZjriXjY-ccjoes sold and ‘y’ ,s f^e number of Ekco Lamps sold, what is your total profit ? ANSWER ON S e t L IN Q Plenty. We know, we know ; it depends on how big ‘x ’ and ‘y’ are. W e ’ll tell you that ‘x ’ is a bit bigger than you're accustomed to and ‘y’ is BIG ! How EKCO big depends on how much you take advantage of handling a really sound selling proposition backed by power­ ful press and poster publicity. In fact you’ll graduate with first-class profits LAMPS if you concentrate on Ekco Lamps. E. K . Co/e, Ltd., Lighting Division. £!-„«, t ~ W rite for full particulars and details Southend-on-Sea VVorfei, of the new simplified discountsystem. April 6 , 1 9 4 5 E l e c t r i c a l R e v ie w 7 " M i V\\cyc\e GRINDERS • Faster grinding. • Less wheel wear per metal removed- • Economy in abrasive wheels. • Low power costs The combination of such desirable qualities has made -Grinders the first choice of grinding equipment. Sizes are available for all classes of work, ue., 2*, 3*, 4", 6* and 8" wheel diameters, including right - angle models. The yftQ&z range of machines also includes Drills, Reamers, Tappers, Screwdrivers, Nutrunners, Sanders and Buffers. \IR COMPRESSORS * P^El.MATIC TOOLS • ELECTRIC TOOLS • DIESEL ENGINES - Va CI IM PI MP* CONTRACTORS' EQUIPMENT • ROCK DRILLS • DIAMOND DRILLS • OIL WELL TOOLS Aot>*rl Sharp L Partner! C 35 April 6 , 1 945 8 E l e c t r i c a l R e v ie w ARDING t l a t u m 's Electric POWER is a mighty sinew of the nation's effort. It must be GUARDED against leakage. Tullis Russell Rothmill Cable Insulating Papers are called upon by leading cable manu­ facturers to perform this task, and it is carried out admirably by these renowned, uniformly high-quality insulating papers. Rothmill Papers are guaran­ teed free from metals and grit. W rite for details of the com plete range. CABLE INSULATING PAPER TülUi^tumUrCo.t Auchmuty & Rothes Paper Mills, Scotland LONDON I Tudor St., RC4 n £ 3 £ S S 5 tt A pril 6, 1 9 4 5 E l e c t r ic a l R e v ie w 9 r0 FLAMEPROOF SWITCHES A AD SWITCH FUSES British Standard 542 S 513 Flameproof Cable sealing gland and armour clamp (Patent N o.471210) S 510 Patent No. 457209 5 amps. 250 volts. 10/15 amp. capacities also available S 515 Key for cover bolts Designed for use in all places where there is risk of inflammable atmosphere. Certified by H.M . Mines Dept, and the Home Office. Certificate No. FLP 825 Groups I and II. Tested and approved for Group III. Test report No. P 36. A d vt. of The General Electric Co. Ltd., Head Office, Magnet House, Kingsway, London, W.C.2 A pril 6 , 1 945 1 0 E l e c t r ic a l R e v ie w To all ARCHITECTS DESIGNERS and ENGINEERS interested in Prefabricated and Unit-constructed Houses HE Rawlplug Company offers you a free service of T technical advice and assistance in the solution of all fixing problems. T H IS FREE SERVICE EX TEN D S from the time your plans are on the Drawing Board until the contract is finished. BRIEFLY, THIS IS WHAT WE OFFER : The services of our organisation, which has over 25 years’ experience in fixing problems of all kinds. If required, one of our tech­ nical experts can be loaned to your Drawing Office to assist you. This service is absolutely free and without obligation. OUR CREDENTIALS. We are the world’s largest manufacturers of fixing devices. We are aware that new methods of manufacture demand in many cases new fixing methods. We offer you our services in advising and, if necessary, designing, special new fixing devices for your particular problem. You are invited to write to the Rawlplug Company. THE RAWLPLUG CO. LTD. Cromwell Road, London, S.W.Z B3I2 April 6, 1945 E l e c t r i c a l R e v ie w H 1 KILOVOLTS SI W V. IM0ICAT0« TfaftAirfl a v e s ofmcn An e m e a o u s This instrument — provides a positive m eans of finally verifying whether conductors may safely be worked on ; —has two ranges, 0-5kV and 0 1 OkV, for m easur­ ing the voltage to earth in systems up to 11 kV ; — has a high factor of safety, being tested at 40kV for one minute, before despatch. LENGTH 2ft. lOJins. W E IG H T 3J lbs. 12 E l e c t r i c a l R e v ie w April 6 , 1 9 4 5 ¿ a L.D.C.
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