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Aviation History
1935
1935 - 1510.PDF
68o FLIGHT. JUNE 20, 1935. THE INDUSTRY A NEW ALDIS LAMP SINCE Croydon is crowded day by day with interested visitors, the sight of the Aldis daylight signalling lamp will be fairly well known even to the ubiquitous man-in-the- street—though one has overheard some quite ingenious theories expressed concerning its use! Actually, of course, the Aldis lamp has a number of uses outside the business of aviation. This lamp, which was first introduced in 1915 in answer to a demand for a portable signalling unit, is, in reality, a miniature searchlight capable of being aimed accurately on a distant object and of being conveniently switched on and off. In its latest form the Aldis lamp has a daylight range, in good visibility, of seven miles. There is a pistol grip with two triggers, one for switching the lamp on and off and another, operated by the forefinger, bringing the reflector into cor rect position after the lamp has been sighted on the object. This system of using a rocking reflector ensures an abrupt cut off, which would not be possible if the switch itself were used. The main body is cylindrical, with a detachable front, for which special coloured glasses can be used. The telescope gives an erect image, magnified three times, and is provided with a graticule. There are, for less accurate work, both open and peep sights above the telescope. Most careful filament posi tioning is necessary for accurate work and this is predetermined at the factory. A portable battery enables the lamp to be independent of the mains and a transformer is also supplied with the standard equipment for use with A.C. circuits. The weight of the lamp itself is only 4^1b. and the makers are Aldis Bros., Sarehole Road, Sparkhill, Birmingham. OIL UPON THE WATERS Twenty-seven separate tanks, which may be used for as many different grades of lubricating oil are contained in a 10,200-ton tanker now being built on the Clyde for the Anglo-American Oil Co., Ltd. AN AUSTRALIAN APPOINTMENT Fit. Lt. F. N. Wright, former instructor to the Australian Fighter Squadron at Point Cook, has been appointed to the Shell Company's aviation staff at their head office in Mel bourne. Since he joined the R.A.A.F. he has completed 1,200 hours' flying on various types of machines. AN ALLOY OF WIDE APPLICATION A NON-MAGNETIC, non-ferrous alloy composed of copper, aluminium, nickel, silicon and zinc, which is almost incorrodible and is not affected by the majority of commercial acids, is being increasingly widely used in aircraft work. Tungum alloy, as it is called, is claimed to have more strength than mild steel and to be more ductile and easily worked, to have three times greater resistance to impact than has chrome steel, and to possess remarkable properties of resistance to fatigue. The manufacturers, the Tungum Sales Co., Ltd., of Iddes- leigh House, Caxton Street, London, S W.i, do not claim that the alloy is suitable for aircraft construction work, but, owing to the fact that it is so ductile, it can be produced in tube form for oil and petrol leads and has, in fact, been widely employed in steam cooling systems. In connection with the latter use, it may be pointed out that the alloy is not corroded by doped fuels and steam. In several well-known British aircraft it has entirely replaced copper for certain parts. Yet another use is as radiator tubes: it has high thermal conduc tivity, and it has been proved, in fact, that the greater the heat the greater the conductivity. Certain manufacturers are employing it for exhaust manifolds, as it welds easily, both to itself and to steel. In sheet form it has been used for fuel and header tanks. One aero engine manufacturing company experienced corrosion in water jackets; by adopting Tungum alloy for these com ponents not only was corrosion defeated but it was found practicable to press out the jacket in one operation instead of three. Corrosion, however, was still experienced on the cylinder wall, so a complete cylinder and jacket in Tungum were pro duced. The alloy is being used on an experimental basis for piston rings and exhaust valve searings. A point of interest is that Tungum, which is widely em ployed in boat construction, is used for the propellers, shafts and sheathings on R.A.F. tenders at Shanghai, as it was found that even copper would not stand up to the corrosion experienced out there. The company is also producing a metallic paint claimed to Features of the latest Aldis signalling lamp. be untarnishable and proof against corrosion. After appli cation the paint is allowed to dry for twenty minutes and then burned into the surface with a blow-lamp. It is possible that the paint wiil have a wide application in marine aircraft. <S> <$> <s> <S- NEW COMPANIES AERO ENGINES LTD.: Private company ; capital, £100in 5s. shares. Objects: To carry on the business of manufacturers of and dealers in aircraft engines and components. Directors to be appointed by subscribers. Solicitors: Pinsent and Co., 6, Bennetts Hill, Birmingham. ANGLIAN AIR SERVICES, LTD. : Private company ; capital. £1,500 in 1,250 7 percent, cumulative participating preference shares of /I and 1,250 ordinary shares of 4s. each. Objects: To operate air lines, deal in aircraft, etc First directors not named. Registered office : 110, Cannon S:reet, London, E.C.4. SHEFFIELD AERO CLUB, LTD. : Public company ; capital, (3,000 >n £1 shares. Objects : to give flying instruction to members of the Sheffield Aero Club, to operate aerial passenger transport, etc. Directors : Oliver Spencer Holmes, Stirling Chamb?rs, Campo Lane, Sheffield ; William A. Artindall; Reginald S. HOTTOX ; Percv E. Smith. AERO PRODUCTS COMPANY LTD. : Private company ; capital, £3,000 in £1 shares. Objects: to manufacture and deal in aircraft, operate air lines, etc. Permanent directors : Edward B. Boughton ; Willie Emmott; Denis T. Brock. Registered office: Brock House, Langham Street, London, W. PUBLICATIONS RECEIVED The Art of Flying. By Capt. Norman Macmillan. Price 2/6 net, Gerald Duck worth and Co., 3, Henrietta Street, Covent Garden, London, W.C.2. Map of India, with Ceylon, Burma find Balrchistan. Price 6/- net, John Bar tholomew and Son, Ltd., 12, Duncan Street, Edinburgh. INCREASE OF CAPITAL COMMERCIAL AIR HIRE, LTD. (Airport of London, Croydon, Surrey). The nominal capital has been increased by the addition of £10,000 beyond the registered capital of £500. The additional capital is divided into 10,000 5 per cent, cumulative preference shares of £1 each. AERONAUTICAL PATENT SPECIFICATIONS (The numbers in parentheses are those under which the specification will be printed and abridged, etc.) Published June 20, 1935) 31868. HAWKER AIRCRAFT, LTD., and CAMM, S. : Bomb or the like carrying and releasing gear for aircraft (428,934). 31960. SHARMA, D. N. : System relating to landing aeroplanes during fog (428,867). 33005. VICKERS (AVIATION), LTD., and WALLIS, B. N. : Biplane-wing systems for aircraft (429,186). 33113. VICKERS (AVIATION), LTD., and WALI.IS, B. N. : Method of and means for assembling and connecting intersecting bracing members (429,188). 17499. FAIREY AVIATION CO., LTD., and TIPS, E. O.: Windscreens for the cockpits of aircraft, motor boats, or motor cycle sidecars, or for use in similar situations (428,896). 18535. FAIREY AVIATION CO., LTD., and HAGGER, V.: Cowling and the like for aircraft and other structures (428,898). 1961"!. SANTONI, E.: Plate cameras, particularly for aeronautical use (428,081). 31G1. AKT.-GES. DER EISEN-UND STAHLWERKE VORM. G. FISCHER : Tail skid shoes for aircraft (429,167). 19297. ARMSTRONG-WHITWORTH AIRCRAFT, LTD., SIR W. G., and LLOYD, J. : Gun mountings on aircraft (429,061).
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