Ordnance – Cartridge feeding – Drum magazine
Patent
1995-05-30
1997-02-04
Johnson, Stephen M.
Ordnance
Cartridge feeding
Drum magazine
89 34, 89 3317, 42 4901, F41A 974
Patent
active
056000839
ABSTRACT:
A magazine filled with ammunition that can be quickly and easily attached to and detached from a firearm. It has a snail-shaped housing with a laterally offset chimney section that has an outlet port at its top end for feeding the ammunition into the firearm. The magazine is capable of being attached to the firearm at two 180 degree separated positions to accommodate a left or right handed person. There is an annular chamber in the housing of the magazine and it contains a spring-loaded drum. A pair of laterally spaced cog gears are mounted on the drum for capturing ammunition shells and transporting them along a circular axis until they reach the vertical linear axis of the chimney section. A follower assembly pushes the ammunition shells up through the chimney section. A shell retainer unit is mounted in the chimney section for preventing shells from exiting its outlet port when the magazine is detached from the firearm. The shell retainer unit is deactivated by a depressor member that moves downwardly when the magazine is attached to the firearm.
REFERENCES:
patent: 198368 (1877-12-01), Farrington
patent: 2011889 (1935-08-01), Birkigt
patent: 2375453 (1945-05-01), Webb
patent: 3032907 (1962-05-01), Parker
patent: 4138923 (1979-02-01), Broggeau et al.
patent: 4658700 (1987-04-01), Sullivan
Bentley James K.
Crawford Willard H.
Johnson Stephen M.
Logan II Charles C.
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