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Aviation History
1944
1944 - 1186.PDF
26 Advertisements. FLIGHT JUNE 8TH, 1944 Inside Knowledge about Castings Photograph of light-alloy casting. To the engineer "inside knowledge" is as important as to the stock-broker: but, .fortu nately for the engineer this inside informa tion is easier to obtain and, above all, more reliable. "IndustreX" and "CrystalleX" X-ray films are always at his disposal to provide him at short notice with the ' inside ' informa tion about the soundness or otherwise of his castings. From such information faulty castings may be discarded before expensive machining, and any necessary modification to design or foundry technique may be deduced. Often radiography is the only means of obtaining this information. 'IndustreX' Type D film—for the routine inspection of light-alloy castings or, with lead screens, for the critical examination of heavy-metal castings. Radiograph of the same casting, showing porosity. 1 Ok, 'IndustreX' Type S film — with fluorescent screens, for heavy-metal castings or welds: without screens, for light- alloy castings with wide thickness ranges, if single exposures only are warranted. •INDUSTREX' TYPE D 'CrystalleX' film—for the critical examination of light-alloy castings or, with lead screens, for the critical examination of heavy-metal castings. 'INDUSTREX' TYPE S CRYSTALLEX' X-RAY FILMS Mode by KODAK LTD. (X-Ray Sales), KINGSWAY, LONDON, W.C.2 SHRINK FITTING OF BUSHES MEANS RAPID ASSEMBLY WITHOUT DISTORTION At 6o°B, too large. At -6o°C. a "freedomfit." This is what one series of "Prestcold" law-temperature cabinets can achieve. Take for example a case where a duralumin bush has to be fitted into a magnesium casting:— Diatn. of bush at shop temperature (say) 1.9400 ins Diam. of bore of casting 1.9380 ins. Interference 0.0020 ins. Take now the new readings after the temperature of the bush has been reduced in a specially designed refrigerator to —6o°C. Diam. of bore of casting at shop temperature 1.9380 ins. Diam. of bush at -6o°C. 1.9369 ins. Clearance o.oonins. This means a freedom fit which speeds up production, reduces scrap, eliminates swarf and so on. Cabinet illustrated is a general- purpose " shrink fit" refrigerator with cooling compartment 21* X 10" X 16". Other sizes available and special - purpose equipment. An investigation into the possi bilities of Prestcold refrigeration equipment in your factory would cost you nothing. Consultations 'given in any part of the country. PRESTCOLD At» iX REFRIGERATION "RESSED STEEL CO. LTD., COWLEY, OXFORD POWER ROAD, LONDON, W/, • 55 ST. GEORGE STREET, LEEDS, I • 353 CHESTER ROAD, -MANCHEigiA
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