Patent GB-756769-A (GB)
Title: Fire-arm
Inventor: FIORINI SESTILIO
IPC: F41A17/74
Filed: 1954-04-08
Abstract: 756,769. Firearms. BREDA MACCANICA BRESCIANO SOC. PER AZIONI. April 8 1954 '[April 8, 1953], No. 10288/54. Classes 92 and 119 A firearm consists of two relatively slidable front and rear parts, the rear part comprising the breech block 1. Fig. 1, rigid with the head 2 and with the stock 3 and the front part comprising the barrel 20, Fig. 2, rigid with the breech 21 and a cartridge magazine 23. The two parts are assembled together by inserting the breech block 1 into the breech 21 and by engaging a pin 19 on the rear part in a bore 48 in a spring-urged connecting rod 37 on the front part, the two parts being locked in the firing position by means of a spring- urged lever 4, Fig. 6, pivoted at 8 within the breech block 1 and having a shoulder 46 engaging the breech 21. After firing, the locking lever 4 is pushed down to release the breech 21 and the front part is then slid forwards to effect extraction and ejection of the spent cartridge and cocking of the firing mechanism, closing of the two parts then loading a fresh cartridge into the breech ready for firing. On the rear part the trigger 14 and counter lever 16 are fulcrumed at 15 and the striker 9 is contained in the breech block 1. When the two parts are closed together for firing, operation of the trigger causes the lever 16 to act upon one end 42 of a seat 31 pivoted at 32 on the front part, the other end of thes eat then being released from detent in a hammer 28 pivoted at 29 on the front part and stressed by a spring 30. The hammer 28 then strikes the striker 9 to fire the cartridge. A spring-urged rod 6 is located between the end 45 of the locking lever 4 and the trigger 14, so that on depressing the lever 4 to release the front part, the rod 6 prevents actuation of the trigger and at the same time a projection 4a on the lever 4 becomes interposed between the hammer 28 and striker 9 so providing a double safety device. In the firing position a safety device is provided by the pin 19 (Fig. 5, not shown) which has a semi-circular section and which in one position prevents movement of the seat 31 for releasing the hammer 28. The two parts are urged to the closed position is by a spring 35. Fig. 6, guided by rod 36 and fixed at its ends at 22 to the front part and, at 50 to a sleeve 51 connected to the connecting rod 37. The magazine 23 is held in position by a spring-urged lever 24. In a modification (Figs. 9-11 not shown), automatic release of the locking lever 4 is obtained on firing by means of a rod connected to a, piston located in a chamber in communication with the barrel so as to receive a portion of the explosion gases, which on firing moves the rod to the rear and an incline thereon engages the retaining shoulder on the lever 4, thus pressing it down on releasing it from the breech. In a further modification, the rear part is fixed to a mount 61, Fig. 13, and the sliding of the front part relative to the rear part is obtained automatically by a motor 62, gearing 63, 64 mounted on the rear part, and a connecting rod 66 pivoted at 67 to the front part and at 65 to the gear wheel 64.