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108 AIRCRAFT ENGINEERING April, 1932 A Portable Hacksawing Machine—Oxy-Acetylene Cutting an d Welding—A Fuel Contents Gauge A SMAL L HACKSAWING MACHINE municate d to the pilot by a sharp "click " which tells him to stop rotating the dial. The amount of Edwar d G. Herbert, Ltd., of Atlas Works, fuel in th e tank is the n read off directly on the dial, Levenshulme, Manchester, have recently added to which is calibrated for the size and shape of the thei r range of sawing machines the "Rapidor tank . Minor " with a capacity of 3 in. by 3 in. This machine can be bolted to the fitter's bench to save A N ALLOY STEEL BOOKLET tim e in sawing u p small stock b y hand, or it can be supplied with a cast iron base for tool room or The United Steel Companies, Limited send a large repair-shop use. booklet on "Stocksbridge " Alloy Steels, manufac I t has two 45-ton steel vee slide bars for rigid ture d b y Samuel Fox & Co., Ltd. , which the y will be guidance and permanent alignment of the saw glad to send to any user on application to Dept. 27, frame, automatic relief on the return stroke by Th e United Steel Companies, Limited, 17 West- means of adjustable oil dashpot, variable spring bourne Road, Sheffield. pressure on the saw blade, and phosphor bronze Th e booklet, which is bound on the loose-leaf bearing. principle so tha t it can readily be brough t u p to-date Th e pulley of the belt-driven Minor is 10 in. by by th e issue of fresh pages when necessary, contains FIG . 1.—The "Rapidor Minor" hacksawing 2¼ in. , and a self-contained motor drive through information on the effects and uses of various reduction gears is also made. The machine ma y be machine alloying elements and comprehensive dat a sheets on ru n at 200 r.p.m. th e different types of steel with details of composi An 8 in. hacksaw blade is used, fitted in special tion, price and specifications filled. A considerable machinin g is afterwards necessary. A considerable sawholders. amoun t of hitherto unpublished data on the effect tim e was also spent in the welding demonstration Th e rat e of cuttin g a mild steel ba r is over 1 sq. in. of mass upon physical effects, etc., is included. shop, where experts showed them some of the per minute. On brass bars the rate of cutting is method s of welding steel and non-ferrous metals, over 5 sq. in. per minute. including elektron, and the welding of deoxidised Th e overall dimensions of the bench machine HEAT-RESISTIN G STEELS copper, which is now finding increasing use, an d is to ar e 2 ft. 2 in. by 1 ft. 1 in . b y 1 ft., the approximate English Steel Corporation, Ltd., of Vickers some degree taking the place of lead for pipe-line weight being 90 lb. Works, Sheffield, who incorporate Vickers-Arm- work. Jigs are used throughout and the Minor is stur strongs, Ltd., and Cammell Laird and Co., Ltd., Thi s firm, which was founded in 1886, incor dily built an d well-finished to sell a t £6 for the belt- send a brochure and folder giving details of their porate s Allen-Liversidge, Ltd., and is the pro driven bench machine. "Immaculate " stainless and heat-resisting steels. prietors of the well-known "Alda" welding Full details of these pearlitic steels are given, materials. The publicity departmen t would be glad including information on their uses, analyses, t o send to any reader interested any of a number TH E AIRSCREW COMPANY LIMITED treatmen t and manipulation, corrosion-resisting of booklets and pamphlets it has prepared and Th e Airscrew Company Limited of Weybridge, properties, heat-treatment, mechanical tests and cuttin g and welding processes and equipment. Surrey, of which Mr. J. D. Titler, is Managing physical properties. A group of parts used in the Director, announce that on March 31 Dr. H. C. Supermarin e S.6 B . Schneider Trophy seaplane is Watt s is joining th e Board as Technical Director. TH E TELEVEL PETRO L GAUGE illustrated . Dr . Watts is well known as the leading expert Th e Televel fuel contents gauge is a standard an d designer of airscrews in Great Britain. Hither fitting in R.A.F. aeroplanes and is fully described t o he has designed wooden airscrews for some of OI L SUPPLIES in Air Publication 1275, "General Instrument th e aircraft constructors, which have been manu Equipmen t for Aircraft," 1930, though a slight Britis h Light aeroplane owners contemplating factured at the Weybridge factory, while on the alteratio n in the details of the actuation of the foreign tours during the coming summer will be meta l side he has confined himself to one particular device has since been made. glad to hear that Aeroshell oil is now distributed type . He will now be free without restriction to Since there is no par t continually floating on the generally throughout Europe, being available a t all continue all his previous activities and be open to surface of th e fuel, the gauge is not in the ordinary th e principal European aerodromes as well as at design all types of airscrews. It is understood that sense a float indicator, the pilot only obtaining a Croydon. Metal Propellers, Limited, of Croydon are negotia readin g of th e level of th e fuel in the tan k when he I t is also available along the main Imperial Air tin g for a continuance of his services as Consultant. requires it. When he wishes t o know the level, he route s to India, Australia, and the far East and Th e Airscrew Company, Limited, are entirely rotate s the face of th e dial on th e instrument board Sout h Africa. independen t of any aircraft or engine interests, an d down the scale. This action is communicated thi s amalgamation should prove an asset to the throug h a Bowden wire t o a plunger and float in the industry . tank . As soon as th e float reaches the level of the HIDUMINIU M ALLOYS fuel it engages with a wheel and the fact is com Th e condition of the Rolls-Royce engine after th e Schneider Trophy race and speed record runs, ACETYLEN E CUTTING AND WELDING a s mentioned by Mr. Pettitt-Herriot, is a testimony On Wednesday, March 9, a party of about t o the materials used. All aluminium parts were 50 men from the Army Vocational Training Centre, mad e from Hiduminium R.R. alloys made by Aldershot, paid a visit to The British Oxygen Hig h Duty Alloys, Ltd., Buckingham Avenue, Company' s engineering workshops at Angel Road, Tradin g Estate , Slough, t o th e R.R. 50 specification. Edmonton . The Centre, which is commanded by Th e firm have recently produced a new corrosion- Major Ben Hurst, D.C.M., provides training for resisting alloy, with the low specific gravity of civil life for soldiers of all non-commissioned ranks 2•65, known as R.R. 66, which is protected by a wh o may be leaving the Army at the end of 12 or Rolls-Royce patent. This alloy works easily in 7 years ' service, and includes a large section devoted dies an d is also suitable for forgings and stampings. t o th e teaching of oxy-acetylene welding an d cutting an d electric welding, while the oxy-acetylene and oxy-coal-gas lead burning is also taught in the NICKE L CAST IRON plumbin g shop. One of the recent advances in metallurgy is the Th e course in welding is of six months duration, production of alloy irons which can be heat-treated an d at the present time about 80 men are under in the same manner as steels, and there is little instruction . doub t that these metals will very soon become Th e party, which was in charge of Mr. Inman, of increasing interest. The Mond Nickel Co., th e chief welding instructor at the Centre, was Ltd. , of Imperial Chemical House, Millbank, conducted in groups around the various depart London , have issued an interesting booklet which ment s of th e British Oxygen Company's Works, and thoug h entitled "Nickel Cast Iron in the Auto shown the various stages in the manufacture of mobile Industry," seems to have just as much blowpipes, regulators and other equipment. They interes t for the aero-engine designer. It describes were specially interested in the oxygen cutting how the metal can be used in almost every part machine demonstration shop, where they saw of an engine such as cylinder blocks and heads, demonstration s of cutting machines which in a few liners, pistons, and piston rings, valve seats and minute s cu t part s to shap e from heavy steel sections guides, tappets, exhaust manifolds, etc. leaving an edge so smooth that practically no
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Apr 1, 1932
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