Safe-arm initiator

Details Safe-arm initiator Safe-arm initiator

1992-11-04

1994-01-18

Brown, David H.

Ammunition and explosives

Igniting devices and systems

Arming devices

102262, F42C 1540, F42C 1534

Patent

active

052792269

ABSTRACT:
A pair of explosive detonators are recessed in the end of a cylindrical body containing a permanent magnet, which serves as the rotor in a brushless, bi-directional torque motor enclosed in a housing. A reversible positioning current causes the motor to rotate the body between armed and safe positions and thereby establish and interrupt axial explosive transfer paths from the detonators to a corresponding pair of explosive transfer lines ported through the housing cover. An internal switching circuit disables the detonators when the body is in the safe position and passes a firing current to them when the body is in the armed position. A detent ring secured to the rotatable body, and a pair of spring-loaded detents in the housing index the rotatable body in the armed and safe positions and prevent its accidental rotation. Mechanical safing means are provided for manually overriding an electrical arming signal.

REFERENCES:
patent: 2725011 (1955-11-01), Sundermann et al.
patent: 3306207 (1967-02-01), Becker et al.
patent: 3500747 (1970-03-01), Parker
patent: 3618527 (1971-11-01), Kilmer
patent: 3658009 (1972-04-01), Allen
patent: 4278026 (1981-07-01), Hibbs et al.
patent: 4424746 (1984-01-01), Boliau
patent: 4592281 (1986-06-01), Nagennast
patent: 4854239 (1989-08-01), Van Sloun
patent: 5168122 (1992-12-01), Furst et al.

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