Over and under guns

741,954. Over and under guns. CHURCHILL (GUN-MAKERS), Ltd., E. J. March 25, 1954 [March 25, 1953], No. 8313/53. Class 119 An over and under gun is provided with mechanism for effecting semi-automatic or selfopening of the gun at the breech, comprising rods H, Fig. 1 slidable in the action body A and movable under the action of the cocking springs N, after initial manual breaking the gun, to impart rotational movement to the gun barrels. Mounted on each barrel is an ejector plate F formed with an extension arm F, positioned in a recess in the action body over the barrel trunnion G. The arm F 1 bears against one endof the rod H, the other end of which bears against a projection D 1 on one side of a cam D mounted on the action body, a projection D 2 . on the other side bearing against the end J 1 of the main spring box J mounted on the lock plate B, thus holding the box J in its highest position and compressing the cocking spring N. In this position the main spring K in the box J is under compression between the lower wall of the box J and the upper surface of a recess in the tumbler L. An ejector cam E is adapted to cooperate with the, cam D. Pivoted on the ejector plate F is a, spring box T adapted to be engaged by an ejector rod P which is normally held out of engagement by a spring Q. Pivotally mounted on the knuckle of the fore-end C is a kicker R. On firing, the nose L, of the tumbler L strikes and rotates the ejector cam E so that its tail E 2 contacts the rear end P, of the ejector rod P, forcing it through the action body into a position for engagement with the spring box T. Movement of the cam E releases the cam D so that, on opening the breech by depressing a lever as described in Specification 731,093, the cocking spring N rotates the box J which moves the cam D to push the rod H through the action body against the arm F 1 of the ejector plate F to rotate the barrel about the trunnion G as shown in Fig. 5. On opening the breech the claw end of the ejector spring box T is held by the claw end of the rod P and the ejector spring box T is rotated causing the spring S to be compressed between the bottom of the box T and the kicker R. At the same time a hump T 1 on the box T rotates the kicker R until the spring S passes under a sharp corner on the kicker R, whereupon the spring S, now no longer restrained by the kicker R, is released to rotate the kicker R violently and react on the extractor (not shown) to eject the cartridge. Specification 741,947 a