BETTER BRAKING
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DATENT No. 844,040 comes from I General Motors Corp., Detroit, Michigan, U.S.A., and covers improvements in brake mechanism. In a twoshoe brake unit, the primary shoe is faced with a predominantly/ non-metallic material, whilst the secondary shoe carries sintered ferrous friction faces.
SMALL SIZE INJECTION NOZZLE A N injection nozzle that can be made I-1 in a small size is shown in patent No, 851,258 (Ceskoslovenske Zavody Naftovych Motoru Praha N.P., 1018 Krizova, Prague 16, Czechoslovakia). The drawing shows the lower part of the injector. The fuel charge enters at the top bore (1) and opens spring-loaded ball-valves (2) and (3). The use of two valves in series is said to provide a perfect seal and lengthen the life of the unit. The fuel then passes through passages (4) which lead to tangential grooves (5). The effect of these is to impart to the fuel a high-velocity spin in the space above the orifice (6).
CYLINDER HEAD FOR V-TYPE ENGINE
ANimproved layout for cylinder-head to cylinder-block location in V-type engines is shown in patent No. 850,129 (E. Payne and The Austin Motor Co., Ltd., Longbridge Works, Birmingham). The main feature of the design is that the tops of both banks of cylinders are in a common plane (1) so enabling a cylinder head common to all cylinders to be used. A single camshaft (2) operates the valves for both banks of cylinders, being located centrally between the banks. The advantages of the at a compact are that
pact layout is achieved
and that the cylinder head and all valve gear can be removed without disturbing the valve timing.
850,129