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Aviation History
1940
1940 - 2316.PDF
138 AUGUST 15, 1940 THE INDUSTRY A special Prestcold low-temperature refrigerator installed in one of our aircraft factories. Long Service AN interesting ceremony took place atthe premises of Messrs. Butlers, Ltd., the well-known aircraft lamp and motor accessory manufacturers, " Atlan- tic" Works, Small Heath, upon the occasion of the presentation of eight gold watches to employees who have com- pleted twenty-one years' service with the company. The presentations were made by the Managing Director, Mr. j. C. T. Blake, who also presided at the ceremony which followed of a free distribution, by means of a selecting drum, of a number of War Savings Certificates, in connection with their National Savings Group. Prestcold Refrigerator PERHAPS one of the most usefulfunctions of low-temperature refrig- eration'is its employment in connection with shrink fits. In modern engineering, much use is made of interference fits for mechanical fixation of parts such as bushes, liners or inserts in main assem- blies and to provide either liquid- or gas- tight joints between parts. In many applications it is only necessary to heat the one part and press or screw into it the other. There are, however, a num- ber of applications arising where high temperature heating of one part is impracticable, either because it affects the physical properties of the material or because it causes undesirable distor- tion. Further, it often happens in prac- tice that when one part is inserted into another by high pressure, a considerable amount of metal is removed from one or both of the parts, resulting in a final interference less than that called for on the drawings. In cases such as these, the cooling to a low temperature of the piece to be inserted, coupled with the moderate heating of the main assembly, can be adopted to ensure a true final interference. In this way production is speeded up as a result of the ease with which the parts can be handled and the light pressure, if necessary at all, required for assembly. Another im- portant consideration in many modern engineering devices is that low-tempera- ture refrigeration enables parts to be placed in position accurately to location. An interesting example of a special- purpose low-temperature refrigerator is illustrated. This refrigerator, installed in an important aircraft factory, is required for the continuous cooling of certain bushes to —80 deg. from room temperature, at the rate of 64 per hour. Bushes are loaded into the cylindrical coolers at the top of the cabinet and withdrawn by means of an air-sealed manual^control ejecting gear at the bot- tom. With this arrangement, no trouble is experienced with " icing-up" of the cooler. The withdrawing of the bushes has no effect upon the temperature of those remaining in the cooler, and further warm bushes can be loaded into the machine at the top without affecting the temperature of those awaiting with- drawal below. A number of these machines have been installed and are in production, and they have enabled con- siderable speed-up in production and saving in labour of assembly. The Pressed Steel Company can supply low-temperature refrigerators for a wide range of capacities and of any type to meet the special demands of industry. Ludlow General Manager MR, HARRY MILNES, who, since1938, has been general manager of Modern Machine Tools, Ltd., returns to the aircraft industry by his appointment as general manager of Ludlow Bros. (19T3), Ltd., and general manager and director of Welsh Metal Industries, Ltd. He still retains his seat on the Board of Modern Machine Tools, Ltd. Mr. Milnes was connected with the aircraft industry for many years, having served with the R.A.F. in the Great War and afterwards with the Blackburn Aircraft Co., Ltd., for a period of fourteen years. The Nickel Bulletin AN historical survey of the electroly-tic pickling and polishing of metals, which is abstracted in the current issue of the Nickel Bulletin, shows that this subject has received much attention during recent years. Bright plating, another subject of wide interest, is leav- ing the experimental stage. Minor abstracts give a few interesting hints on the cleaning of stainless steel, and details of Monel nails, which are claimed to be superior to screws in holding power. A.G.S. Data MOSERS, LTD., of Liverpool andLondon, who hold large stocks of A.I.D. certified A.G.S. parts and who are known throughout the industry for their ingenious Moser Patent Locating Pin, have prepared a booklet of aircraff. data useful to have handy in desiga offices. It gives in a convenient manner weights and dimensions of A.G.S. parts and aircraft steel. Copies are to be had from either their Liverpool address at 112-114, Old Hall Street, or from 170-192, Borough.High Street, London, S.E.i. - • >•-••' NEW COMPANIES ..„' . LANCASHIRE AIRCRAFT CORPORATION, LTD.—Registered as a "private" company on July ze, with a nominal capital of £100 in 100 shares- of£1 each. The objects are: To carry on the busi- ness of manufacturers of and dealers in aeroplanes,seaplanes, gliders, balloons and parachutes, motor cars, motor and other cycles, launches and boats,internal combustion engines, etc. The directors are: Ernest Walton, Verwood. Ightenhill Park,Burnley, cotton manufacturer, and Harold Bolas, Swandean Corner. Salvington Hill, Worthing, aero-nautical engineer. /.,•-.• AERONAUTICAL PATENT SPECIFICATIONS 30406. 30601. 31020. 3143/ 31082. 31Z74. 31609. 31750. 31753. 27188. 27190. 29176. [Published May 23, 1940.)19.38. CLEVELAND, F. J. (BENDIX AVIATION COR-PORATION). Pressure-sensitive devices (520.411). BENDIX AVIATION CORPORATION. Securingof conductors on magnetic teeth or poles, and more particularly in dynamo-electricmachines (520.418). KINGSTON, P. F. Lifting-rotor for aero-nautical purposes (520,599). BAYERISCHE MOTOREN WERKE. AKT.-GES.Disposition of engines in aircraft (520.457). STANDARD TELEPHONES AND CABLES, LTD. (MATERIEL TELEPHONIQUE SOC. ANON.).Radio direction-finders (520,606). Published May 30. 1940.) 1938. ,COWFY, L. E. Tail wheels for aircraft (520,648). ARGUS MOTOREN GES. Charge-formingdevices tor internal-combustion engines, especially aircraft engines (520,705). CuNLIFFE-OWEN AIRCRAFT, LTD., andFOWLER, L. J. P. Gun mountings, more particularly intended for aircraft(520,848) BECKETT, LAYCOCK AND WATKINSON, LTD.. and WATKINEON, A. Windows for air-craft (520,793). BRITISH AIRWAYS. LTD.. and MCMILLAN,A. R 0. Pre-flight plan and navigation log for use in aerial navigation (520,865).(.Published June 6, 1940.) 19.38. DOWTY, G. H. Retractable undercarriagesfor aircraft (520,994) DOWTY, G. H. Undercarriages and ores-sure-reservoirs of aircraft (520,995). BRISTOL AEROPLANE CO., LTD., and FRISE.L. G. Gun turrets tax 'aircraft (520.884). 29178. BRISTOL AEROPLANE Co.. LTD., and FRISI,L. G. Gun turrets for aircraft (520.88'i). 31775. DOWTY, G. H. Resilient wheel mountingsfor aircraft undercarriages (520,944). 31891. KOLLSMAN, P. Drag tachometers or rate-of-motion indicators (520,904). 31898. DORNIER-WERKE GES., and DORNIER. C.Structural members, more particularly aircraft spars or beams or girders(520,945). 31937. WEBLEY AND SCOTT, LTD., and SMALLWOOD.H. \V. Use of signal pistols on aircraft and other rapidly-moving vehicles (520,929). 31944. KING, F. W. Aircraft (520,948).32241. ALGARSSON, G. Synchronising mechanism for multi-engined aircraft (521,000).32261. KORT. L. Propulsion of air and marine craft (520,984).32305. HARWOOD, D. Aircraft fitted with lifting- screws (521,102). 991- CASSVAN, M 1939- Parachute (521,033). (Published June 13, 1940.) 1Q.33. „.,; 27565. BLACKBURN AIRCRAFT, LTD., and STIIGIR. H. J. Wing flaps of aircraft (521,100). : 28966. TRIGGS, W. W. (AKT.-GES. BROWS. BOVERIE & Cm). Wind tunnels (521,143).32737. KINDELBERGER, T. H. Machine eun mountings for use on aircraft (521,205)- 32738. BOWEN, K., and TORRESEN, C. T. Signalpistol mountings for use on aircraft (521,272). 32938. AVIMO, LTD., and STEVENS, H. C. M.Apparatus for measuring air flow (521,294).32958. CHEESMAN, R. S. Helicopters (521,218). 32963. DOWTY, G. H Resilient wheel mouitings for undercarriages of aircraft (521,2*V.
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