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Aviation History
1940
1940 - 0818.PDF
254 Industry (continued) turb the desired fuel delivery pressures. The maximum depression likely to beencountered in the suction pipe in any given installation is dependent mainlyupon the maximum suction head, diameter, length and contour of the pipeline and restrictions in the pipeline. That depression, in acting upon, the effectivearea of the relief valve, tends to pull the valve off its seat, thereby resulting inerratic delivery. It is possible, of course, to spring-loadthe valve sufficiently to withstand this pull and at the same time maintain aconstant delivery pressure so long as the aircraft is stationary, but as soonas the craft is air-borne the different effective suction heads encountered inflight upset delivery pressures. • - •• A Balanced Valve A practical solution is to balance the relief valve, and the Rotherham valve ha? been designed with this in view. By interconnecting the valve with a diaphragm of an equal effective area, the variable loadings encountered under flight conditions automatically balance • out and leave the valve unbiased except for the constant spring load to give the desired delivery pressure. In certain types of high-speed aircraft relatively high air intake pressures may be encoun- tered. In these instances • it may be necessary to balance out by leading a pipe line from the air intake to the under side of the diaphragm, thereby main- taining a constant effective delivery pressure to the float chamber of the car- burettor. It is to be noted that the Rotherham unit incorporates a valve somewhat larger in diameter than that normally employed, the object being to reduce the valve lift to the minimum. The majority of fuel pumps in use to-day incorporate valves of the un- balanced type, and where pumps of this type are already fitted the Rotherham valve may readily be installed as a separate unit in the pipe line. The overflow pipe should preferably be led to a point immediately behind the suction side of the pump, and it is MARCH 14, 1940 not necessary to run the pipe r^ack to the fuel tank. It is to be noted that the latest practice is to incorporate in the fuel pump itself a. balanced type of relief valve, a case in point being the Ameri- can Pesco pump now fitted to the current types of Bristol engines. The Rotherham relief valve unit has been designed for use in those earlier installations not equipped with pumps of the Pesco type. An important feature not to be lost sight of is that a pump having a balanced valve is capable of dealing with its maximum suction capacity, whereas pumps having the unbalanced type of valve are able to cope with maximum suctions only when delivering at pressures of 15 to 20 lb. per sq. in. Clearly pressures of, this magnitude are not suited to carburettors at present designed to cater only for pressures up to 3 lb. per sq. in. or so. Factory LightingW ARTIME illumination of factoriesis a difficult problem for any firm to solve. In most factories whereartificial light is in use by dav as well as by night the employees are inclined togrumble a little about the feeling of heaviness which is' apparent under theseconditions. The result is a degree of slackening in production. "Modern Factory Lighting," a bookwhich has recently been issued jointly by the British Electrical DevelopmentAssociation and the E.L.M.A. Lighting Service Bureau, 2, Savoy Hill, London,W.C.2, deals" extensively with all the problems of factory lighting and has aspecial chapter on wartime requirements. Factory lighting legislation is covered,also the functions of industrial lighting, the choice of light sources, the design oflighting installations, and it also dis- cusses a number of specialised indus-trial lighting problems. Photographs, diagrams and chartshave been used profusely to emphasise and simplify the text. The price is8s. 6d. AERONAUTICAL PATENT SPECIFICATIONS 2110. 12138. 13811. 15657- 21440. 232/4- 23974- 24044. 24070. 30822. 14754- 20669. Published March 14, 1940.) 1938. BRISTOL AEROPLANE CO., LTD.. FRISE, L. G-, and PONTING, K. Gun-firing sys-tems (518,113). WESTLAND AIRCRAFT, LTD., and FETTER,W. E. W. Aircraft aerofoils (518,065). BENDIX AVIATION CORPORATION. Carbu-rettors for internal-combustion engines (517.964). WHITEHEAD, G. E. Wind-operated devicesfor use in elevated positions for obstruct- ing or destroying hostile aircraft, and forother purposes (519,068). AIRCRAFT COMPONENTS, LTD., and BOUND, R. H. Locking and operating means of retractable parts of aircraft (518.073). AEBOPLANI CAPROMI SOC. ANON Devices for the neutralisation of the aerodynamic thrust acting on the surfaces of Runs mounted on aircraft (517,920). STONE & Co., LTD., J., and HATCHER,E. C. Retractable undercarriages for aircraft (518,922). LAURENCE, H. Doors for motor cars, air- craft, or other vehicles or structures <5iS,o85). FINLAYSON, D., GREENWOOD, E. L., and WYLDE, J. R. Parachutes (518,101). CAREY, F. H. Collapsible struts for re-tractable undercarriages for aeroplanes and other purposes (518.130). GAYRAL, P. Aeroplanes (518,154). (Published March 21, 1940) I938- COLLINS, F. E. Transportable splinter- proof armoured cells for anti aircaft observers and others (518,165). BENDIX AVIATION CORPORATION. Tem- perature-compensated pressure-responsive indicating instruments and devices (518,264). 24178. AEROPLASTICS, LTD., and STILL, S. C. HART. Aircraft wing construction (518.178). 24181. GOODRICH CO., B. F. Apparatus for pre- venting ice accumulation on surfaces, for example, surfaces of travelling aircraft (518,180). 26316. HAASE. M. Device for protecting construc- tions from bombardments from the air (518,338). 1939- 9618. BURLS, M. R. Retractable undercarriages for aircraft (518,359). 20489. F. E. PROPRIETARY CO., LTD., and FINZT,G. Fire-extinguishing bombs or grenades (518,359). PUBLICATIONS RECEIVED The Blue Book, IQ40: 25s., Benn Brothers, Ltd., Bouverie House, 1.54. Fleet Street, EC.4. Modern Ignition Simply Explained, by H. H. U.Cross; 5s., The Technical Press, Ltd., 5, Ave Maria Lane, Ludgate Hill, London, E.C.4. L'Annee Aeronautique ig^S-ig^Q, by L. Hirs- chauer and Ch. Dollfus Dunod, Editeur, 92, rue Bonapart, Paris, France. Modern Factory Lighting; Including special War- time Requirements, British Electrical Development Association and the E.L.M.A. Lighting Service Bureau, 2, Savoy Hill, London, W.C.2. Simple Aerodynamics and the Airplane, by C. C.Carter; $4.50, The Ronald Press Co., 15, East 26th Street/New York. N.Y., U.S.A. Annual Report of the Smithsonian Institution, 1938; ji.y, Superintendent of Documents, Wash- ington, D.C., U.S.A. NEW COMPANIES DIXON ROLT DEVELOPMENTS, LTD.—Privatecompany. Registered February 24. Capital £3,500 in 3,500 shares of £1 each. Objects; Toacquire any interest in inventions and patents relating to the manufacture of motor and allwheeled vehicles and chassis, aircraft and acces- sories, marine steam and internal combustionengines, locomotives, etc. The directors are: Fdk. W. Dixon, Ardverness, Wray Common Road,Reigate, Surrey, engineer; Anthony P. R. Rolt, Brookfield, Nantwich, Ches., racing motorist. FAIRFIELD AVIATION, LTD., was registered as aprivate company on February 26, with a nominal capital of £10,000 in 10,000 shares of £1 each. Theobjects are to carry on the business of aeronautical, mechanical, electrical and general engineers, manu-facturers of aircraft and Hying machines, water planes, motor boats and balloons, and componentparts thereof, etc. The subscribers (each with one share) are: R. C. Bartlett, solicitor; F. C. Bright,managing clerk; I. B. E. Ford, private secretary; and S. M. Claughton, accountant and cashier; allof 27, John Street, W.C.I. Permanent governing director and chairman: Reuben C. Bartlett, of" Kenilworth," 35, Thetford Road, New Maiden, Suney (governing director of Redwing Aircraft Co.,Ltd.). Secretary; F. C. Bright. Solicitors: R. C. Bartlett and Co,. 27, John Street, Bedford Row,W.C.I. The registered office is at 27, John Street, Bedford Row. W.C.I. W. COOPER (GRIMSBY), LTD.—Private company.Registered March 1. Capital £5,000 in £1 shares (2,(100 cumulative preference and 3,000 ordinary).Objects : To carry on business as heating and con- structional engineers and specialists, ventilating,lighting, electrical, radio, automobile and aviation engineers, metal workers, etc. The subscribers(each with one share) are: \V. Cooper, 94, Welsby Road, Grimsby, engineer; W. B. Cooper, 66. ParkAvenue, Grimsby, engineer. W. Cooper is per- manent managing director. Qualification jooshares. • BROCKLIN, LTD.—Private company. RegisteredMarch 5. Capital £1,000 in 1,000 shares of £1 each. Objects: To carry on the business of irontounders,mechanical engineers and manufacturer!; of and dealers in engines for all kinds of aircraft, motorcars and other vehicles, etc. The directors are: James C. Nicklin (chairman), The Close, Ashton-under-Hill, Evesham, Worcs.; John W. Nicklin, " Grafton House," Cooper's Lane, Smethwick,Staffs..; John T. Brockhquse, "Cliveden," Hartopp Road, Four Oaks, Warwickshire; John W. Nicklin,Jnr. (managing disector), Lloyds Bank House, Bearwood Road, Smethwick. Qualification: £125shares. 'Remuneration as fixed by the company. Secretary: D. B. Tinley. Solicitor: Wm. Hadgkiss,185, High Street, Smethwick. Registered office: 185, High Street, Smethwick. ALLTOOLS (CANADA). LTD., was registered as aprivate company on February 28 with, a nominal capital of /loo in 100 shares of £1 each. Theobjects are: To carry on the business of manufac- turers of arid dealers in aeroplanes, seaplanes andaircraft component parts of all kinds, machine tools and lathes, plant and machinery of all kinds, engi-neers, etc. The subscribers (each with one share) are: W. Davidson, 182, Galliard Road, LowerEdmonton, N.o, solicitor's clerk; and T. W. Wes- trop, 6a, Stoneleigh Park Road, Ewell, Surrey,solicitor's clerk. The first directors are to be ap- pointed by the subscribers. Remuneration asfixed by the company. Solicitors: B. A. Woolf and Co., 31, Lombard Street, E.C.3. The registeredoffice is at 31, Lombard Street, E.C.3. ANDREW WEIR INSURANCE COMPANY, LTD., wasregistered as a private company on February 2Q, with a nominal capital of £250,000 in 250,000 sharesof £1 each. The objects are: To transact every kind of insurance, assurance, guarantee and in-demnity business; to undertake, accept and insure against or upon the contingency or risk (including• all such war and reprisals risks, and risks of a similar nature as may from time to time be law-fully undertaken) of any injury, loss, damage or liability arising to, or in respect of any persons,property, assets, rights and interests whatsoever; to insure against marine and aerial navigation risks,etc. The subscribers (each with one share) are: Henry R. Carlson. 21, Bury Street, E.C.3, in-surance manager; James M. Duxbury, 21. Bury Street, E.C.3, chartering clerk. The first directorsare to be appointed by the subscribers. No quali- fication required. Solicitors: Stephenson, Harwoodand Tatham, 16, Old Broad Street, E.C. The file number is 359,580. COIXEDGE BROTHERS, LTD.—Private company.Registered March 2. Capital £5,000 in 5.000 shares of £1 each. Objects: To carry on the business otmechanical, constructional and general engineers, manufacturers of and dealers in machinery, rolniwstock, tools, aeroplanes, etc. The permanent dmc- tors are: Oscar L. Spedding, Park Hill, Staly-bridge, Ches., engineer (director of William "tap and Co., Ltd.); and T6seph Colledge, 131, Bi5h(JPStreet, Moss Side, Manchester, tool maker. U"a"' fication: £10 ordinary shares. Remuneration asfixed by the company. Solicitors: Thompson ana Cooke, 138, Stamford Street, Stalybndge K<tt«-tered office: Eagle Ironworks, Stalybndge. u.».
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