GB454721A - Machine gun fire control apparatus - Google Patents

Abstract

454,721. Machine guns. DUNLOP RUBBER CO., Ltd., 32, Osnaburgh Street, Euston Road, London, and BEHARRELL, G. E., WRIGHT, J., and TREVASKIS, H., c /o Dunlop Rubber Co., Ltd., Fort Dunlop, Birmingham. March 6, 1935, No. 7008. [Class 92 (ii)] [See also Group XXVIII] Remotely - controlled pneumatic cocking means for machine guns, particularly those mounted on aircraft, comprises a piston 28, Fig. 2, working in a cylinder 16 on the gun, the rod 17 of the piston, which engages the usual cocking-handle 18, being provided with a rocking catch 22 for engagement with a spring-controlled catch 30 to hold the cocking handle in the rear position. The catches 22, 30 are adapted to be disengaged by a second penumatically-operated piston 21 engaging arms 32 fast with the catch 22 which is hinged to the piston rod at 29. A third arm 26 of this catch carries a projection 25 for engaging the cocking-handle 18 this projection being removed from the path of the handle when the piston 21 is operated. The handle is then returned forwardly by the gun mechanism and the piston rod returns under the action of tension springs connected to the pivot 29 the arms 32 then engaging stops 34 to restore the projection 25 to its operative position. Fig. 1 shows a pneumatic system for connecting the cylinders 16, 20 with an air reservoir 1 through the medium of pipes 15, 19 and press-button valves 13, 12. The reservoir is also shown connected to the cylinder 6 of a trigger-motor controlled by a finger-lever 10 on the joy-stick 11.