Ammunition and explosives – Igniting devices and systems – Heat – friction – or chemical primers or ignitors
Patent
1982-12-27
1985-05-07
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Heat, friction, or chemical primers or ignitors
F42C 1908
Patent
active
045150800
ABSTRACT:
An inertia type friction initiator for rotating projectiles includes a metallic mass, retained by a shear pin and joined to one end of a metal twisted or braided wire or cable, that is set in motion upon impact of the containing projectile with a resistant media, the target. Friction of the cable with a friction primer mixture sets off the mixture. The mixture activates a booster explosive that, in turn, detonates to produce a blase wave which explodes the main charge of high explosive of the projectile. A keeper-washer/sleeve system connected to the cable prevents premature activation by projectile rotational acceleration on the flight axis. The other end of the cable is embedded in the friction primer mixture at an angle of 90 degrees to the central or flight axis. Minor on-axis impacts that may tend to occur during storage, handling, shipment and loading are precluded from causing initiator actuation by proper selection of the shear pin.
REFERENCES:
patent: 3942445 (1976-03-01), Baker et al.
patent: 3976008 (1976-08-01), Altschuler et al.
Jordan Charles T.
Thiokol Corporation
White Gerald K.
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