Blank firing attachment for machine gun

Details Blank firing attachment for machine gun Blank firing attachment for machine gun

1985-11-18

1987-08-11

Terapane, John F.

Ordnance

Barrels

Recoil increasers

F41F 1712

Patent

active

046853782

ABSTRACT:
An attachment for a maching gun with automatic firing mechanism operated by barrel recoil has a tubular jacket positionable over the barrel. A rear end of the jacket is securable to the gun casing and its forward end surrounds the muzzle of the barrel. A restrictor screws into the forward end of the jacket and slides over the barrel muzzle to form a chamber between the muzzle and a transverse wall of the restrictor. Overpressure relief ports are formed in the transverse wall of the restrictor, and exhaust ports are located in the side wall. Gas pressure is built up in the chamber after a blank round has been fired to cause the barrel to recoil a sufficient amount to actuate the automatic firing mechanism. Once the barrel recoils past the exhaust ports, the gas pressure is released to stop the recoil motion. The recoil stroke and rate of fire are adjusted by adjusting the position of the restrictor in the jacket, to adjust the position of the exhaust ports.

REFERENCES:
patent: 2339777 (1944-01-01), Green
patent: 2805602 (1957-09-01), Moore

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