Ammunition and explosives – Igniting devices and systems – Arming devices
Patent
1978-12-14
1980-08-05
Brown, David H.
Ammunition and explosives
Igniting devices and systems
Arming devices
102244, 102255, F42C 1522
Patent
active
042156351
ABSTRACT:
An improved safe and arming device for isolating the fuse from the main eosive charge in spin stabilized shells to prevent premature detonation of such shells. The improved safe and arming device comprises a housing adapted to be positioned intermediate of the fuse and the main explosive charge of such shells for rotation therewith about a shell spin axis when the shell is fired, a rotor mounted in the housing for rotation about a rotor axis, and a rotatable control member engageable with the rotor and being rotatable about an axis extending in the same direction as the rotor axis for controlling the rate of rotation of the rotor. The rotor is positionable in a desired start position and is adapted to rotate in response to rotation of the shell to an armed position to communicate a detonation signal from the fuse to the explosive charge. The rotatable control member carries an oscillatory member which is adapted to periodically move in one direction and then in a different direction in response to rotation of the rotatable control member so that the momentum of the oscillatory member is periodically changed. The rate of periodic change of momentum thus controls the rate of rotation of the rotatable control member, which in turn controls the rate of rotation of the rotor from the start position to the armed position.
REFERENCES:
patent: 2448228 (1948-08-01), McCaslin et al.
patent: 2457254 (1948-12-01), McCaslin et al.
patent: 3670655 (1972-06-01), Krupa
patent: 3972290 (1976-08-01), Czajkowski et al.
Brown David H.
Edelberg Nathan
Gibson Robert P.
The United States of America as represented by the Secretary of
Yarmovsky Max
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