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Aviation History
1939
1939 - 0465.PDF
FEBRUARY 16, 1939 FLIGHT. 173 The Industry process enables magnesium alloys to be plated by any of the normal plating processes there does not seem to be any reason to expect trouble after a long lapse of time. The new process, which is the joint invention of Mr. F. C. Katon and Mr. H. Webb, is cheap, rapid and apparently not in the least " temperamental," so that there is good reason to think that it can be carried out by semi-skilled operators. First, the magnesium part to be treated, which can be in the form of sheet or castings, is immersed in an aqueous bath for a couple of minutes. It is then swilled in cold water and placed in a special zinc bath, where it remains for ten to fifteen minutes. After removal from the zinc bath the article is again swilled, and is then ready for plating by any of the usual processes. Polished sections of " keyed " magnesium plate show, under a 500 times microscopic examination, complete regularity and cohesion of the zinc to the magnesium, indicating that the " keying " has been absorbed into the zinc coating and forms a perfect adhesive bond. The uniformity of the zinc coating is rather remarkable. The microscopic examination also showed that the surface structure remains unimpaired after treatment, and pieces of treated metal exposed to ordinary atmospheric conditions showed no signs of deterioration after several months' exposure. No traces of galvanic action between the magnesium and the deposits have been found, and heavy chromium deposits on castings and sheet have shown no signs of reaction. The application of this process to rubber bonding through brass is a natural corollary, and certain tests carried out on behalf of the inventors by the T. B. Andre" Rubber Co., Ltd., have shown conclusively that when the magnesium is treated by the Katon-Webb process the bond between rubber and magnesium is as strong as that between rubber and steel. We ourselves witnessed one of these tests at the Andre works last week. The tensile test piece sustained, without breakage, a load of 2,142 lb., which corresponded to a pull of 920 lb. /sq. in. That there will be a great many applications of the Katon- Webb process to aircraft work is obvious. Perhaps the com ponent which has the most strenuous time is the airscrew, and it would appear that chromium plating of magnesium airscrew blades would afford complete protection not only against cor rosion, but against damage by rain and hail. Should a rubber " Flight " photograph. STRANRAERS AND SPITFIRES are flown with equal dexterity by Fit. Lt. A. G. Pickering, A.F.C., the Supermarine test pilot who, together with his colleague F/O. J. K. Quill, A.F.C., demonstrated the powers of the Spitfire at Eastleigh during the recent visit of Sir Kingsley Wood. Fit. Lt. Pickering is seen here " at the wheel " of a Stranraer. coating of the blades be preferred, and this might have certain advantages, it can be applied without any difficulty. Messrs. Katon and Webb (of 39, Greenlands Road, Staines, Middlesex) are now seeking commercial exploitation of their invention. At the BRITISH INDUSTRIES FAIR AS in the past, there are a large number of exhibitors at the British Industries Fair, opening on Monday, who are known in the aeronautical industry, though not all of them will be featuring aircraft components in their displays. A list & Exhibitors at Birmingham Accles fit Pollock, Ltd. (D.510). Accles & Shelvoke, Ltd. (A.321 216). Aeraspray Manufacturing Co., Ltd. (t>.7»), Aerofilms, Ltd. (B.720). Aerograph Co., Ltd.. The (D.227). Albion Drop Forgings Co., Ltd. (D.418). Alexander, Geo. H., Machinery'. Ltd. (D.622). Allen, Edgar, & Co., Ltd. (D.719). Anglo-American Oil Co., Ltd. (D.306). Association of Drop Forgers & Stampers (D.418). - Automotive Engineering Co., Ltd. (D.205). Autoset (Production), Ltd. (D.526). Avery, W. & T„ Ltd. (D.515 & 412). Bakelite, Ltd. (Cb.408). Baldwins, Ltd. (Midland Branch) (Cb.222). Bedford. John, & Sons, Ltd. (A.431 & 332). B.E.N. Patents. Ltd. (B.627). Birmingham Battery & Metal Co., Ltd., The (D.607 "& 506). Birmingham Electric Furnaces, Ltd. (Cb.313 & 214). Black & Decker, Ltd. (Cb.511). Blackburn Aircraft, Ltd. (D.no) Britannia Batteries, Ltd. (Cb.608) British Aluminium ' (D.615 & 514). British Insulated (Cb.401 & 300). Bntish Oxygen Co. 312). British Thermostat Co.. Ltd., The ICb.700). British Thomson-Houston Co., Ltd., The (Cb.505 & 404). i°LhT^e Engineering (Southport), Ltd (D.700 & 606). rT,,ght?n' J- (a6oo>- w) kers' Association (Cb.401 & Ci>(on%S kWe ? C-^^tior. •-o., Ltd. (Cb.401 & 300). Co. Ltd., Cables, The Ltd. Ltd. (D.411 Canning, W\, & Co., Ltd. (Cb.215 & 118). Cellactite & British Uralite, Ltd. (B.623 & 532). Cellon. Ltd. (B.529). Chatwin, Thos., & Co. (D.709 & 606). Chesterfield Tube Co., Ltd., The (D.609 & 508). Chloride Electrical Storage Co., Ltd., The (Cb.307). Constructors, Ltd. (Cb.609 & 508). Daniels, T. H. & J., Ltd. (Cb.724). Deritend Stamping Co., Ltd. (D.418). Desoutter Bros., Ltd. (Cb.403). Dunlop Rubber Co., Ltd. (D.511). Firth, Thos., & John Brown, Ltd. (D.619 & 518). Firth-Vickers Stainless Steels, Ltd. (A.505; D.413 & 314). Fletcher, Miller, Ltd. (D.618). General Electric Co., Ltd., The (G.E.C.) (Cb.515 & 414). Gent & Co., Ltd. (Cb.5J3). Gilman, F. (B.S.T.), Ltd. (Cb.518). Gledhill-Brook Time Recorders, Ltd. (Cb.7i9)- Guest, Keen & Nettlefolds. Ltd. (B.524). Hall & Hall, Ltd. (D.721). Herbert, Alfred. Ltd. (D.304 & 309). Henlev's, W. T., Telegraph Works Co., Ltd. (Cb.401 & 300). Hughes-Johnson Stampings, Ltd., The (D.418). LCI. Metals, Ltd. (D.403 & 302). Imperial Chemical Industries, Ltd. (Decreasing) (D.305). Imperial Chemical Industries, Ltd. (Heat Treatment) (D.204). Incandescent Heat Co., Ltd., The (Cb.605 & 504). Joseph, N. C. Ltd. (Cb.514). Laycock Engineering Co., Ltd., The (D.418). Lee, Arthur, & Sons, Ltd. (D.520). Lewin Road Sweepers, Ltd. (D.709 & 606). Light Metal Forgings, Ltd, (D.418). London Aluminium Co., Ltd., The (A.411 & 310) of such firms, of whose presence at the Fair we have been advised, appears below. Both sections of the Fair, at Birming ham and London (Olympia and Earls Court) remain open from February 20 until March 3. Turner Bros. (Birmingham), Ltd (D.Z23). United Steel Companies, Ltd.. The (D.613 & 512). Valor Co., Ltd., The (B.401). Venesta, Ltd. (D.725). Voucher, Ltd. (D.614). Wakefield C. C, & Co Ltd (Cb.301). Walker, James, & Co., Ltd. (D.422) Ward, H. W.. & Co., Ltd. (D.315). Wellworthy Piston Rings. Ltd. (D.229). Wickman, A. C, Ltd. (D.408). Wild-Barfield Electric Furnaces Ltd (Cb.303 & 204). Yorkshire Copper Works, Ltd., The (B.723 & 632). Zinc Alloy Rust-Proofing Co., Ltd. (D.732). London Exhibitors Air Ministry (Earls Court, 217). Bakelite. Ltd. (Olympia, A. 763 & 769). Barr & Stroud, Ltd. (Olympia. A.683). British Airways, Ltd., and imperial Airways. Ltd. (Earls Court. 262). British Celanese. Ltd. (Olvmpia. G.1507). British Plastics Federation. Ltd. (Oiympia, A.773). Chance Bros. & Co., Ltd. (Olympia, A.677). Cooke, Troughton and Simms. Ltd. (GJympia, A.678). Ebonestos Industries. Ltd. (Olvmpia, A.743). . Hughes, F A., & Co., Ltd. (Olym pia, A.760 & A.775). Imperial Chemical Industries, Ltd. (Olympia. A.627 & 640). Insulators, Ltd. (Olympia, A.761). Jobling, James A., & Co., Ltd. (Olympia, A.801). Lines Bros., Ltd. (Olympia. K.1833). Model Aircraft Stores (Bournemouth), Ltd. (Oljmpia, J.1729). Plantation Wood, Ltd. (Olympia, F.r.325). S. & D. Rivet Co. (Olvmpia, G.1554). London & Midland Steel Scaffolding Co., Ltd., The (D.426 & B. Out door). Lucas, Joseph, Ltd. (Cb.501). Ludlow Brothers (1913), Ltd. (A.323 & 218). Mavitta Drafting Machines, Ltd. (D.706). M.C.L. & Repetition, Ltd. (D.406). Metalectric Furnaces, Ltd. (Cb.605 & 504). Midland Saw & Tool Co., Ltd., The (B.226 & 237). Morgan, Geo., Ltd. (D.418). Moseley, David, & Sons., Ltd. (D.630). Newton, L. H., & Co., Ltd. (D.224). Perry & Co., Ltd. (D.616). Pinchin, Johnson & Co., Ltd. (B.617 & 516) • Pitman, Sir Isaac, & Sons, Ltd. (Cb.202). Poles (1938). Ltd. (Cb.609 & 508). Priestman, T. J., Ltd. (D.509). Reynolds Tube Co., Ltd. (D.623 & 522) Rotax, Ltd. (Cb.501). Rozalex, Ltd. (Cb.722). Rubery. Owen & Co., Ltd. (D.703 & 602). Salter. Geo., & Co., Ltd. (A.407 & 306). S. & D. Rivet Co. (D.704). Sellman & Hill, Ltd. (A.307 & 202). Serck Tubes, Ltd. (D.608). Silvertown Lubricants, Ltd. (D.310). Simmonds Aerocesscries, Ltd. (D.421). Smith's Stamping Works (Coventry), Ltd. (D.418). Standard Telephones & Cables, (Cb.401 & 300). Sternol, Ltd. (D.720). Taylor, Chas. (Birmingham), (D.612). Tecalemit, Ltd (D 4T5 & 316). Terry, Herbert, & Sons, Ltd. (B.424) Thomas. Bertram (Cb.321). Thor Hammer Co. (D.225). Titanine, Ltd. (Cb.606). Ltd. Ltd.
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