Programmed shell casing ejector apparatus for automatic cannon

Details Programmed shell casing ejector apparatus for automatic cannon Programmed shell casing ejector apparatus for automatic cannon

1979-03-27

1981-05-26

Bentley, Stephen C.

Ordnance

Cartridge feeding

With magazine

42 25, F41D 1100

Patent

active

042691087

ABSTRACT:
A programmed shell casing ejector apparatus, for an automatic cannon having an axially reciprocating bolt assembly, includes an ejector member axially slidably mounted to the bolt assembly, a pair of cam tracks symmetrically fixed to a cannon mount, and a corresponding pair of cam track followers pivotally mounted to the bolt assembly to engage the ejector member and, as the bolt assembly recoils, the cam tracks. Ejection through an ejection port of a fired shell casing, held to a bolt face by an extractor, is caused when the ejector member is moved forwardly relative to the recoiling bolt assembly by the cam track followers as the followers move along the cam tracks. Timing and velocity of the shell casing ejection is programmed, to prevent cannon malfunction or jamming due to improper ejection or casing damage, by configuring the cam tracks and followers so that the ejector member moves forwardly relative to the bolt assembly at controlled, increasing velocity preselected to be substantially less than recoil velocity of the bolt assembly.

REFERENCES:
patent: 2710477 (1955-06-01), Simpson

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