Ordnance – Cartridge feeding – Drum magazine
Patent
1994-11-21
1995-10-10
Johnson, Stephen M.
Ordnance
Cartridge feeding
Drum magazine
89 34, 89 3317, 42 4901, F41A 974
Patent
active
054561531
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: 1365845 (1921-01-01), Nelson
patent: 1394494 (1921-10-01), Green
patent: 4509284 (1985-04-01), Naber
patent: 4586281 (1986-05-01), Chesnut
patent: 4658700 (1987-04-01), Sullivan
patent: 4720931 (1988-01-01), Jensen
patent: 4745842 (1988-05-01), Shou-Fu
patent: 4756110 (1988-07-01), Beltron
patent: 4862621 (1989-09-01), Kearney
patent: 4864758 (1989-09-01), Crossman
patent: 4867039 (1989-09-01), Dobbins
patent: 5054221 (1991-10-01), Ozols
patent: 5056252 (1991-10-01), Velezis
Bentley James K.
Crawford Willard H.
Johnson Stephen M.
Logan II Charles C.
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