Firearms – Stock or barrel connectors
Patent
1994-09-16
1995-06-13
Jordan, Charles T.
Firearms
Stock or barrel connectors
42 97, F41C 2722
Patent
active
054231450
ABSTRACT:
A harmonic vibration tuning device is provided in the forestock of a rifle engaging a cantilevered barrel forward of the rifle action, for the purpose of effecting a change the harmonic vibration frequency of the barrel, that is generated, as a projectile moves through the barrel to the muzzle. This adjustable change in the harmonic vibration frequency of the barrel causing a controllable change in the impact placement of a plurality of fired projectiles. The harmonic vibration tuning device of the preferred embodiment includes a containment assembly that is mounted in a cavity formed in the forestock. The assembly includes a threaded adjustment shaft extending horizontally through the assembly with the shaft being threadedly mated with a reactive contact means. The reactive contact means, of the preferred embodiment, engages the surface of the barrel permitting a force to be exerted between the forestock and the barrel. The threaded shaft protrudes toward the front surface of the forestock to enable it to be rotationally adjusted. The assembly also contains a shaft inadvertent rotation prevention device to apply sufficient force against the threaded shaft to allow both for desired incremental rotational adjustment of the threaded shaft, while at the same time inhibiting undesirable rotation of the shaft during discharge or handling of the rifle. The threaded shaft is secured to the assembly to prevent undesired longitudinal movement of the threaded shaft and the reactive contact means within the assembly. When the threaded shaft is rotated the reactive contact means moves longitudinally along the axis of the barrel. This motion causes a change in the longitudinal contact point of engagement of the reactive contact means and the barrel. This change of longitudinal positioning of the reactive contact means which is engaging the barrel with sufficient pressure, causes a change in the harmonic vibration characteristics of the barrel.
REFERENCES:
patent: 2140945 (1938-12-01), Swarz
patent: 2589912 (1952-03-01), Weld
patent: 2610426 (1952-09-01), Emerson
patent: 3060612 (1962-10-01), Brown et al.
patent: 3340641 (1967-09-01), Recker
patent: 3604136 (1968-09-01), Edwards
patent: 4057924 (1977-11-01), Joseph
patent: 4282671 (1981-08-01), Wood et al.
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