Ordnance – Automatic – Regulation of speed or rate of automatic fire
Patent
1975-06-27
1977-05-17
Brown, David H.
Ordnance
Automatic
Regulation of speed or rate of automatic fire
89142, F41D 1102
Patent
active
040234657
ABSTRACT:
An auto-loading firearm has a firing mechanism that selectively permits (1) conventional semi-automatic operation or (2) automatic operation that permits bursts to be fired at a rate which can be varied between 1 and about 12 rounds per second in response to the finger pressure on the trigger, without release of the trigger or adjustment to the firearm. The mechanism for accomplishing variable rate of fire includes a cam surface on the bolt carrier which causes the trigger to move forward at one point in the firing cycle, an automatic trigger disengager device pivotally mounted on the frame for coopertion with the trigger, and a trigger depressor device, the mechanism being brought into an operating mode by a manually operated selector lever which has a variable fire position and a safety position. In the event that the variable rate mechanism becomes inoperative, as by breakage of a part the firearm will be fail safe and will operate in the semi-automatic mode. Certain existing firearms can be modified rather easily to include the variable fire rate mechanism, or the mechanism can be incorporated during initial manufacture of the firearm.
REFERENCES:
patent: 2873650 (1959-02-01), Pinkerton
patent: 3029708 (1962-04-01), Marchisio
patent: 3236154 (1966-02-01), Iwashita
patent: 3251268 (1966-05-01), Menneking
patent: 3292492 (1966-12-01), Sturtevant
patent: 3301133 (1967-01-01), Sturtevant
patent: 3715954 (1973-02-01), Rude
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