Box Patents (Class 42/50)
  • Dormant spring
    Patent number: 3999319
    Abstract: A spring for long-term installation in a limited space, in a minimum-stress condition. When thrust is desired, the position of some spring components is adjusted, resulting in a tendency for the spring to expand.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: December 28, 1976
    Inventor: Daniel D. Musgrave
  • Rifle magazine
    Patent number: 3977114
    Abstract: A magazine for dispensing cartridges has improved capacity provided by an enlarged case and a hinged, two-piece follower pivotally mounted on a follower platform, which is elevated in the case by means of a spring. The enlarged case also serves as a hand rest to aid in steadying a rifle with which the magazine is used, thereby improving firing accuracy.
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: August 31, 1976
    Inventor: Robert G. Poor
  • Adjustable spring assembly
    Patent number: 3964199
    Abstract: An adjustable spring assembly which can be installed in a no-load condition in a minimum space. When the spring is to exert thrust, some parts are moved relative to others so as to cause mutual interference tending to expand the assembly. One suggested use for this type of spring assembly is in cartridge magazines for firearms.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: June 22, 1976
    Inventor: Daniel D. Musgrave
  • Clip for semi-automatic firearm
    Patent number: 3952441
    Abstract: The present invention relates to a magazine for inserting one cartridge at a time into the chamber of a firearm. This magazine includes a pair of side-by-side cartridge chambers separated by a partition extending longitudinally through the magazine and laterally to a point in spaced relation to the rear wall of the magazine. This allows the cartridges in the magazine to lie juxtaposed to the partition until they move upwardly to converge, one at a time, to be fed in the firearm chamber.
    Type: Grant
    Filed: October 18, 1974
    Date of Patent: April 27, 1976
    Inventor: William A. Tant