Patent GB-191325471-A (GB)
Title: Improvements in Slaughtering Pistols.
Inventor: CASH CHRISTOPHER
IPC: A22B3/02
Filed: 1913-11-07
Granted: 1914-02-05
Abstract: 25,471. Cash, C., and Accles, J. G. Nov. 7. Breech actions, movable - barrel other than drop-down; firing- appliances applicable generally. -Relates to slaughtering - pistols of the type in which a solid captive bolt is urged forward on discharge and is returned by air compressed during the forward movement, and consists in providing a barrel adapted to swing about a vertical pivot to open the breech, combined with (1) a cartridge-extractor actuated on swinging the barrel, (2) a cartridge chamber having a coned forward end, (3) a breech-block having a coned forward end fitting into a conical recess in the rear of the captive bolt, (4) gas outlets in the barrel communicating with a surrounding silencing-chamber, (5) a locking-plunger which engages the bolt and the barrel and is disengaged therefrom by the trigger and by a special lever respectively, and (6) an adjustable sleeve surrounding the muzzle to vary the effective stroke of the bolt. In the form shown in sectional plan in Fig. 2, the barrel A turns on a vertical pin B<2> on the body B. Loosely surrounding the pin B<2> is a ring K having a shoulder K<3> which engages a spring pawl L pivoted on the body B, and a projection K<2> which engages the enlarged end of the sliding rod J<2> of the extractor J. As the barrel rotates, the pawl L holds the ring stationary and withdraws the extractor until the pawl is released by a stud M on the barrel, whereupon the extractor is returned into the barrel by a spring J<3>. The firing-bolt C, Fig. 1, which is driven forwards into the animal's head on discharge, has a coned recess C<3> at its rear which fits over the conical breech-block H<2> and serves to deflect the discharge gases away from the walls of the barrel and so prevent fouling. Holes A' in the barrel permit the passage of the gases into a silencing-chamber E surrounding the barrel, when the bolt C, the head C<2> of which normally covers them, is driven forward. The barrel is locked in the closed position by a spring plunger D, which may be withdrawn by means of a lever G mounted on the trigger pin G<2>. The plunger D also locks the bolt C by engaging one of the channels C<4> in the bolt C, and is released by the trigger F, which is, however, incapable of retracting the plunger sufficiently far to unlock the barrel. A slot D<3> is formed in the underside of the barrel, so that the nose of the plunger shall not interfere with the opening movement. A sleeve E<5> surrounds the silencer E and is capable of longitudinal adjustment by a screw-and-slot device E<3>, E<4> so as to vary the effective stroke of the bolt C. The barrel may be removed from the body B by removing a screw B<3>, which engages an annular channel in a peg A<2> on the barrel engaging in the body. A screw E<2> locks the silencer to the barrel and discloses, when removed, an aperture for lubricating the bolt. The cartridge chamber is coned at its forward end, so that the cylindrical cartridges shall not become riveted in it. A wad A' surrounding the bolt prevents blood from fouling the barrel.