Electrical Review Photo L. S. E. motors for BOILER HOUSE AUXILIARIES L.S.E. have specialised for many years in the manufacture of motors for the exacting service demanded of power station auxiliaries. The range of machines includes the “ N-S ” Variable Speed A .C . motor ; large direct starting squirrel cage motors, which may be of the “ Trislot ” high torque type when required ; and all standard types. The “ EM COL ” cooling system, enabling totally enclosed machines to be made of practically any required output, is also invaluable for many boiler house applications. (The illustration is of six265 H.P. 422 R.P.M. 3'3 K.V. direct starting squirrel cage “ EMCOL ” totally enclosed vertical spindle pump motors at LITTLE BARFORD power station. Other power stations recently described in the technical Press, for which we supplied many motors, include EARLEY and LLYNFI.) ( e o u r e c h m k J LAURENCE, SCOTT & ELECTROMOTORS LTD. NORWICH, MANCHESTER. LONDON AND BRANCHES 11 E l e c t r ic a l R e v ie w M arch 23, 1945 Reed. T ra d c M a rk JVo’i . 5*6 ¿*5-6-7 _ ------------------ MEMBERS OF THE CABLE MAKERS ASSOCIATION Th. Anchor a b l e Co. Crompton Parkinson W . T. Henley’s Tele­ The London Electric St. Helens Cable A Ltd. Ltd. (Derby Cables Ltd. ) graph Works Co. Ltd. W ire Co. and Rubber Co. Ltd. Smiths Ltd. British Insulated Cables The Enfield Cable Johnson & Phillips Ltd. The Macintosh Cable Siemens Brothers A Ltd. Works Ltd. Co. Ltd. (Siemens The India Rubber, Co. Ltd. Callender’s Cable A The Metropolitan Electric Lamps and Edison Swan Cables Ltd. Gutta-Percha & Tele­ Supplies Ltd.) Construction Co. Ltd. graph W orks Co. Ltd. Electric Cable A Connollys (Blackley) W. T. Glover A Co. Ltd. (The Silvertown Co.) Construction Co. Ltd. Standard Telephone Ltd. Pirelli-Gcnera! Cable & Cables Ltd. Greengate & Irwell Liverpool Electric Cable Works Ltd. (General rhe Craigpark Electric Co. Ltd. Electric Co. Ltd.) Union Cable Co. Ltd. Cable Co. Ltd. Rubber Co. Ltd. Wvt. of th . Cobit Makers' Association, H,eh Ho/born House. 52-5-1 HiSh Ho/born. London. W .C .l. 'Phon. Ho/born 7633 March 23, 1945 E l e c t r ic a l R e v ie w 1 Even the raising of water temperature must work against the clock—especially to those who have to work against time in obtaining ample supplies of Hot Water. We do not decry the virtues of the Coal Range in providing employment for otherwise idle hands. We simply contrast it with a Heatrae. LEADERS IN ELECTRIC WATER HEATING HEATRAE LTD., NORWICH PHONE : NORW ICH 25131 GRAMS : HEATRAE. NORWICH “WESTMINSTER THE “FACILE” TERMINAL Brush Send for Prices and List of all Holders kinds of Terminals 100,000 & C O . ROSS COURTNEY \ t d . SUPPLIED ASHBROOK ROAD. LONDON, N. If MADE TO SUIT ANY MACHINE Dynamos and Motors Rewound and Re-constructed. “ Partridge ” Pressure ETHER CAPS to the spec­ Detectors,“ Partridge” Earthing Devices, ific require­ ments of our Switchgear, Photographic Arc Lamps, customers Electric Welders, Medical Arc Lamps Mahers of all types of re­ petition pro­ ducts from the bar in all Th. WESTMINSTER ENG.Co.Ltd. metals Victoria Road.Wlllotdon Junction,N.Y/.IO Telephone: Telegrams: M-C-Land REPETITIO N LTD. « Willesden 1700-1 ‘ Regency, Phone, London." Pool Lane Lanqleq Birminqnam. A 2 E l e c t r i c a l R e v ie w M arch 23, 1945 These (w saved £500 a year by P»F» correction» Two needs existed in a large forge. efficient constant speed drives. At the First, equipment was required to maintain same time they maintain an overall the overall power factor at an economical maximum demand of approximately figure. Second, motors were required to 1,800 kW at a power factor of -985 drive two large compressors. By ordering lagging. They saved £500 a year on the two 560 H.P. Crompton Auto- maximum kVA demand over what it Synchronous Motors the forge satisfied would have been with ordinary induction both needs. The motors provide highly motors without p.f. correction. CRom PTon^pRRKinson LIMITED ELECTRA HOUSE, VICTORIA EMBANKMENT, LONDON, W.C.2 and Branches March 23, 1945 E l e c t r ic a l R e v ie w 3 A7 / 4 3 he roads of the present lie deep in the past” F o r every purpose demanding a de­ pendable high standard of performance, Alton stationary batteries are installed. Behind them is a tradition of craftsmanship in battery design and manufacture and of efficient and reliable performance in service. The established traditions associated with the name of Alton define the standard of the future and point to the choice of Alton batteries for services of vital importance. ALTON BATTERIES OF MERIT THE ALTON BATTERY CO. LTD. (Sole Suppliers of FULLER Stationary Batteries) ALTON, HANTS. Telephone: 41ton 2267 and 2268 Telegrams, : ‘B attery, Alton*. E l e c t r i c a l R e v ie w M arch 2 3 . 1943 Messrs. Volt and Amp, Mr. and Mrs. Watt and their relatives in the Electrical family are constantly getting disgruntled because these Micanite and Insulators people will keep them in their place. Every time they try to do a bit of quiet shorting or tracking they come up against a piece of Mica or Micanite or Paxolin or Panilax or Empire tape. It's all very distressing for Messrs. Volf and Amp etc., but it's highly approved by electrical Manufacturers w ho must keep electricity in its place. THE MICANITE & INSULATORS CO LTD EMPIRE WORKS. BLACKHORSE LANE . LONDON. £.17 mi Makers of MICANITE (Built-up Mica Insulation). Fabricated and Processed MICA, PAXOLIN (Synthetic-resin laminated sheets, rods, tubes and cylinders). High-voltage Bushings and Terminals for indoor and outdoor use Empire varnished Insulating Cloths and Tapes and all other forms of Electrical Insulation. Suppliers of Vulcanised Fibre, Leatheroid. Presspahn, etc. Distributors of Micoflex-Duratube Sleevings and Kenutuf Injection Mouldings (P.V.C.). March 23, 1945 E l e c t r ic a l R e v ie w 5 BEN7AMJN LIGHTING DATA BENJAMIN HAVE A WIDE RANGE OF SUPPLEMENTARY LIGHTING UNITS Supplementary lighting can be applied from near or from a distance according to the circumstances. There are local lighting reflectors, either Extensive (1), or Intensive (2) to be mounted on pendants, or there are 45° (3), or 90° types (4) to be mounted in positions where they will not cause glare in the eyes of others. Local reflectors are fitted on adjustable brackets (5) which can be rigidly locked in any desired position. From a distance the Intensolux (6) throw s a fairly narrow beam of light. It can often be placed high up out of the way. The miniature Intensolux (7) used with low voltage auto lamps gives a small circle of light from a shorter range. The illustrations are of fila­ ment reflectors, fluorescent tubular lighting often requires the use of supplementary units also. A This is sheet No. 12. If you have not seen the others in the series, write for them. BEN7AMJN THE BENJAMIN ELECTRIC LTD. Brantwood Works, Tottenham, LONDON, N.I7 Telegrams : Telephone : Benjalect, Southtot, London ” Tottenham 5252 (5 lines) LIGHTING APPLICATION BY BENJAMIN ENGINEERS 6 E l e c t r i c a l R e v ie w M arch 2 3 , 1945 ARDING F la tten 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. Write for details of the com plete range. R O T H IillL L CABLE INSULATING PAPER TuiU tH uieU tC o.itd. Auchmuty &. Rothes Paper Mills, Markinch, Scotland M arch 23, 1945 E l e c t r ic a l R e v ie w 7 STIJRTEVAAT ELECTROSTATIC PRECIPITATORS L a r g e a a d S m a l l S c a l e P l a n t s f o r E l l m l v a t ia g R u s t , E u m e a n d M i s t Special designs for prevention of oil haze in machine shops and removal of welding fumes, cleaning of air of atmospheric dust for optical, photographic and similar work. Our reference WII4/U will gladly supply full particulars. St l r t e v a n t E n g in e e r in g Co. Lt d . 2 5.W0RCESTER ROAD, SUTTON, SURREY. T e l e p h o n e : V i g i l a n t 2275 8 E l e c t r i c a l R e v ie w M arch 23. 1945 REDIFFUSION WAV E M E T E R 100 to 43,000 K.C. (3,000 to 7 metres) in 8 ranges. Size 7\m x 91" x 6 * \ Weight 7\ lbs. Call box 5" x 8T x 8T. The compact, precise check on every ship and shore radio station. Used by very many senior inspectors and officers forsetting and maintaining accurate frequency calibration. Immediate Delivery. Write for details to Sales 4 REDIFFUSION LTD Designers and manufacturers of Radio Communication and R L dif o n Industrial Electronic Equipment A SUBSIDIARY OF BROAD CAST RELAY SERVICE LIMITED VICTORIA STATION HOUSE ■ VICTORIA STREET - LONDON • S-W I (PHONE VICTORIA 68311 M arch 23, 1945 E l e c t r ic a l R e v ie w 9 ..........................