GB296716A - Improvements in gun mountings - Google Patents

Abstract

296,716. Armstrong, Whitworth, & Co., Ltd., Sir W. G., Lee, H. W., and Rowell, J. F. May 31, 1927. Ordnance breech mechanism.-Relates to apparatus for the automatic operation and control in sequence of actions performed by various parts of a machine or plant and is specially applicable to controlling the breech movements of a gun when these operations are performed hydraulically in a certain sequence. According to the invention, a control shaft 3 is rotated to actuate in sequence, preferably by cams 7. the valves a, b, c, &c., or other members, which control the various steps in a cycle of operations, locking means, preferably in the form of stops 23 engaging projections 22 on discs 21 on the shaft 3, being automatically released during, or on completion of. one operation to allow the next operation of the cycle to take place. In the apparatus shown, each cam 7 actuates its valve through a bell-crank lever 9 one arm of which has an arcuate slot 13 engaged by a pin 14 on a connecting rod 15 forming the radius of the slot.. A lever 20, Fig. 3, corresponding to each cam enables the pin 14 to be. placed in any position in the slot, to reduce the motion of the valve and if necessary to cut out. the operation controlled by the valve. The locking stop 23 is automatically released on completion of an operation, such as the movement. of a gun 27 to the loading position, or the opening or closing of the breech by a hydraulic cylinder 24, Fig. 4, controlled by a valve 26 engaged by the gun part. The following operations and their reversals are controlled by the apparatus shown-(a) bringing the gun to the loading position and locking the gun slide; (b) opening the breech of the, gun, (c) raising the shell, (d) tilting the shell to the loading angle, (e) traversing the rammer to a position in line with the gun, (f) ramming the shell.