Automatic hand gun |
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| 申请号 | US3780618D | 申请日 | 1971-05-20 | 公开(公告)号 | US3780618A | 公开(公告)日 | 1973-12-25 |
| 申请人 | THOMAS J; | 发明人 | SANFORD H; | ||||
| 摘要 | This invention relates to a recoil-actuated automatic hand gun, which provides for utilizing a maximum sized cartridge in a hand gun system. The reactive thrust as the bullet leaves the muzzle of this gun causes a barrel, barrel extension, receiver, and bolt to slide back locked together a set distance during initial motion until the bullet leaves the bore of the gun, and the gas pressure decreases to a level low enough to permit the safe unlocking of a locked breech action. The sliding receiver reaches its limit of travel and hits a portion of the frame of the pistol. A through-slot in the bolt bears cam surfaces which rotate the bolt out of breech-locking splines in the breech action thereby to release the bolt from engagement with the receiver and permit the inertia of the bolt to carry it backwards to perform ejection, cocking, and the loading of a new cartridge. In order to replace some of the dissipated energy and to increase the speed of travel of the bolt to load spring-return mechanisms, and to perform the functions of the bolt with the speed required, a rotary, mechanical accelerator forms a part of the action and imparts a blow to the bolt at the time that the receiver reaches its stop position. The bolt is rotated out of the breechlocked position by balanced cam follower means fixed to the frame that follow the cam surfaces, and upon return to the breechlocked lock position, the entire assembly travels as a unit to the battery position with a loaded cartridge in the chamber. A safety tappet pin engages a spiral groove in the bolt to prevent premature firing before the action has reached an appropriate position. The bolt is adapted with unique ejection means, which ejects the spent cartridge case forward and away from the shooter''s head and face. | ||||||
| 权利要求 | 1. In an automatic pistol having a frame and a recoil actuated bolt mounted to said frame and rotated by cam means for breechlocking with spline means, and by primary recoil energy imparted to said bolt by the recoil of a barrel and receiver assembly, and having a trigger mechanism for firing, imprOvements which comprise: torsion spring means, said torsion spring means engaging the bolt and the frame of said pistol and being reacted against each of them, said torsion spring means being pre-loaded by unlocking rotation of said bolt, and said torsion spring means releasing stored energy for rotation of said bolt to breechlock the same; and a cocking member mounting said bolt for rotation comprising a pair of compression spring mounting rods, a pair of compression springs, said compression springs being mounted on said rods, and a pair of closed channels, said channels being formed one on each side of said frame, said rods being slidably mounted in said channels for compressing said compression springs for returning said bolt, said barrel, and said receiver, said rods mounting said cocking member to the frame. 2. Improvements according to claim 1, comprising tappet pin means mounted to the frame, said tappet pin means being in contact with an external surface of said bolt, said bolt having a recess in said external surface, said recess seating said tappet pin when said bolt is in its breech-locked position for firing, said tappet pin preventing firing by the trigger mechanism when the bolt is out of breech-locked position, and said tappet pin releasing said trigger mechanism for firing when it is seated. |
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