Patent GB-760552-A (GB)
Title: Improvements in multiple cartridge clip feeding mechanisms for automatic guns
IPC: F41A9/59
Filed: 1954-10-19
Abstract: 760,552. Cartridge feed mechanism. BREVETS AERO-MECHANIQUES SOC. ANON. Oct. 19, 1954 [Oct. 30, 1953], No. 30078/54. Class 92. Cartridge clips D', D<SP>2</SP>, D3, D4, D<SP>5</SP>, Fig. 7, are guided towards a gun through a magazine 4, the movement of the clips being effected by a driving mechanism which is operated by a power system when the gun is firing and which is movably guided in the magazine and is adapted to catch the clips and move them towards the gun. The magazine shown does not partake of the recoil movements of the barrel 1 and breech casing 2, Fig. 1, and is mounted in an inclined position as shown. Clips are placed into the magazine through a filling window in the upper wall, and the last clip may be pressed down by the insertion of one's arm through an opening 11 in the end wall. Some of the cartridges of the lowermost dip are engaged by toothed wheels 13 on a tubular shaft 14, the rotation of the wheels serving to move the cartridges towards a feed opening 37 and the empty clips through a passage 6 from which the clips are subsequently ejected. Deflectors 36 assist in the stripping of the cartridges from the clips. Cartridge feeding mechanism.-When a round is fired the breech casing recoils and a pivoted cam lever 15, Fig. 2, thereon engages between a fixed roller 18 on the stationary magazine and a roller 20 on a spring-controlled push piece 19. The resultant movement of the push piece causes a rack 22 thereon to rotate a sleeve 24 which is associated with free wheel device 25, 26, 27, dog clutch 30, 31, and hollow shaft 33 in such manner that shaft 33 is rotated in one direction step by step and serves to twist the left hand end, Fig. 2, of a torsion bar 34 and also, through a clutch 35, to rotate the shaft 14. The action is such that shaft 14 is firstly partially rotated through the clutch 35 and subsequently by the torsion bar for each step of feeding a round to the gun. The feeding of a round is assisted by a spring-controlled lever 38 in known manner, Fig. 6, an arm of which contacts a fixed stop (not shown) when the lever is rotated anti-clockwise by a round of ammunition. A second lever 38a with a stronger spring 39a co-operates with the lever 38 and absorbs the inertia of the moving parts before lever 38 strikes the abutment. Clip feeding mechanism.-When the lowermost clip D<SP>1</SP> has been moved clear of the next clip D<SP>2</SP> the latter and also the other clips in the magazine are moved downwards by a mechanism controlled by a cam 53 driven by shaft 14. The cam acts directly, or through a multiplying lever system illustrated in Fig. 12 (not shown), on a roller 54 fitted to a spring- controlled rod 45 which is connected at 44 to two pawl-carrying slides 40, the pawls of which engage clip D<SP>2</SP>. A number of other pawls on further slides 43 engage the other clips, these slides being connected to a spring- pressed rod 50 also moved by the cam 53 via the rod 45. When the roller slips off the edge of the cam the clip D<SP>2</SP> moves quickly to the position for its rounds to be engaged by the wheels 13, and the other clips partake of a slower downward movement. In Fig. 17 (not shown) the cam 53 is associated with a further cam acting as an energy accumulator. Cartridge clips.-The clips consist of a base plate 68 and end walls 69, the plate 68 being fitted with racks 71 for positioning the cartridges and with spring strips 72, and the walls having notches 70 with which the pawls engage. The inner faces of one wall 69 has guiding walls 73 opposite the points of the rounds of ammunition.