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Aviation History
1963
1963 - 0977.PDF
948 FLIGHT International, 13 June l%l INDUSTRY International Flight Systems Company News Great Britain PRODUCTS Trident Warning Switches Temperature sensitive switches manufactured by Engel & Gibbs, Elstree Way, Boreham Wood, Herts, are used in the de Havilland Trident <subject of a detailed description in Flight International for May 2) for excessive-tem perature warning in the alternator field windings and associated fluid driving unit. They are also used for insertion in the main hydraulic tanks to give warning should the temperature of the system rise above safety level. The temperature sensitive switch unit is fitted with a sprung head which keeps in •direct contact with the alternator field windings and will adjust itself to manu facturing differences. Normal setting is 175°C, to make contact on the rising temperature and operate warning lamps and relays. The fluid driving unit tempera ture sensitive switch is fitted into the Hobson constant speed fluid drive and monitors the temperature of the fluid. Should a fault or overload occur in the drive and the hydraulic fluid temperature rise above safety level, the switch is set at 115°C to make contact on a rising tem perature and operate warning lamps and relays. The Engel & Gibbs unit in the main hydraulic tanks in the Trident is made of stainless steel and normal setting is 90CC to make contact on a rising temperature and operate warning lamps and relays should the temperature of the system rise above safety level. Connections are made to the switch by means of a Cannon receptacle subminiature connector. Twenty-five Years of Tapes The new headquarters of Sellotape Products Ltd, marketing company for the Sellotape range of industrial and domestic self-adhesive tapes, were formally opened by Mr Alan Green, MP, Minister of State, Board of Trade, on May 27. Sellotape House is a nine-storey building at 54-58 High Street, Edgware, Middx, and its opening coincided with the 25th anniversary of the intro duction of this now well known self- adhesive tape to the British market. In addition to the many domestic varieties of Sellotape there is an even wider range for industrial applications. To mention only a few, there are electrical tapes to withstand high voltages and temperatures; tapes with an adhesive which sets hard when subjected to heat; masking tapes for the aircraft and motor industries; surface- protection masks (which leave no trace of adhesive when removed) to protect highly finished surfaces; a rayon-reinforced band- Empire Test Pilots' School visitors to Boulton Paul Aircraft Ltd at Wolverhampton listening to Mr L. Williams, structural test engineer, as he explains a structural- strength test on a Beagle 206 fuselage. The company, a member of the Dowty Group, are making these tests on fuselages and wings under a Beagle contract Wiring by British Insulated Calender's Cabin Ltd being installed in the BAC One-Eleven, for which BICC have supplied the bulk of tht wiring cables for electrical services. Cabling installed covers a wide range of types and sizes. including Nyvin, Efglas, Tersil and Flexvin cables; miniature wires to DEFIO, Type 2C; equipment wires to DEFI2, Type 2; and radio- frequency and other specially developed cables ing tape with a vinyl backing; and tapes with special photographic and lithographic applications. A comparatively recent de velopment, and one of which the manu facturers' research department is partic ularly proud, is "Sheenshield" tape, on which any required legend can be printed under the surface of the glossy protective film. COMPANY NEWS Garrett-Westland Negotiations The Gar rett Corporation, Los Angeles, Calif, are negotiating with Westland Aircraft to per mit Normalair Ltd, a licensee of Garrett Corp for aircraft air-conditioning equip ment in the UK, to sub-licence Ateliers SEMCA, Toulouse, for the manufacture of certain selected items of equipment. In December last year Westland Aircraft announced .Flight International, December 27) that its wholly owned Swiss subsidiary. Westland SA, had purchased a 48 per cent holding in Ateliers SEMCA, leading French designers and manufacturers of air-con ditioning equipment with a considerable export business. Neither Garrett Corp nor its Swiss subsidiary, Garrett International SA, holds any stock interest in SEMCA.
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