GB190910569A - Automatic Fire Arm. - Google Patents

Abstract

10,569. Menteyne, P. M., and Degaille, P. A. Oct. 21, 1908, [Convention date]. Breech actions, sliding barrel and breechblock.-Consists in a modified construction of automatic guns of the class in which the barrel, breech-block, and firing-pin recoil together, and wherein the firing-pin is held in its recoiled position by a detent while the barrel and breech-block are pressed forwards by a spring, thereby causing relative movement between the firing-pin and breech-block, which movement unlocks the breech-block from the barrel; the breech-block is then held back while the barrel advances and thus opens the breech. The firing-pin, when released to fire the gun, moves the breech-block forwards and locks it to the barrel. According to the present invention, the breech-block 3 is locked in the breech-closing position by a vertically-sliding locking-bolt 5, which, at the moment of discharge and during the recoil, is supported in the locking position, in engagement with a recess 33 in the extension 2 of the barrel 1, as shown in Fig. 1, by studs 28 on the firing-pin 4. At the end of the recoil, a hook 29 on the firing-pin is engaged by the noses 37, 38, Fig. 2, of the trigger 10 and a pivoted arm 14 respectively, and the firing-pin is retained while the barrel and breech-block commence to counter recoil under the influence of the barrel spring 21. The relative movement between the firing-pin and the locking-bolt 5 causes the studs 28 to enter inclined slots 32, Fig. 5, in the sides 31 of the bolt 5, whereby the latter is depressed and the breech-block becomes locked to the firing-pin while the barrel continues to move forwards alone. The lever 14 is rocked automatically to disengage the hook 29 by the action of a projection 36, on the barrel extension 2, upon the end 39 of the lever when the barrel reaches the firing position, and when the trigger 10 is pulled, the breech-block and firing-pin are thrown forwards together by the firing-pin spring 23, until the breech-block strikes the rear face of the barrel, when its movement is arrested while the firing-pin continues to move and first raises the bolt 5 into the locking position and then effects the discharge. When the magazine M is empty, the retaining-hooks 45 are automatically released bv the cartridgelifter L, and the magazine falls from the gun. The rear end 47 of a lever 15 is then raised by a spring 16 into position to engage the firing- pin hook 29, and the breech is thus held open until, upon the insertion of a new magazine, the end 46 of the arm 15 is raised by a projection P on the magazine. The Specification, in the original form, as open to inspection under Section 91 (3) (a), comprises also a device for enabling the gun to fire single shots, consisting of a second trigger 41, and a piece 12 pivoted thereto, which piece first acts upon the trigger 10 to effect the discharge and is then rocked about its pivot by contact with a fixed pin and releases the trigger. This subject-matter does not appear in the Specification as accepted.