Firearms – Barrels – Rifling or lining
Patent
1978-04-27
1982-10-12
Jordan, Charles T.
Firearms
Barrels
Rifling or lining
F41F 1710
Patent
active
043531814
ABSTRACT:
A rifled gunbarrel has stepped relief narrowing width of lands on the sides which normally transmit torque to projectiles, the narrowing extending about one projectile length to the muzzle for isolating the influence of torsional relaxation of gunbarrel, which is normally a trajectory-perturbing factor on projectile emergence, while continuing radial contact for projectile guidance along the gunbarrel axis as the gunbarrel unwinds.
REFERENCES:
patent: 36592 (1862-09-01), Atwater
patent: 245015 (1881-08-01), Reilly
patent: 804483 (1905-11-01), Lincoln
patent: 868938 (1907-10-01), Puff
patent: 2089219 (1937-08-01), Moore
patent: 3525172 (1970-08-01), Marshall et al.
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