Bei Electronics LLC

James E Goble

Philip B Baldwin

Raymond W Mort

Kenneth L Moore

The joint construction is employed between a military rocket motor and a warhead adapted to be propelled by the motor. The motor includes a motor tube with a cylindrical front portion having an internal cylindrical surface therein. The warhead comprises an adapter ring having a cylindrical rear portion with an external cylindrical surface which is telescopically receivable within the internal cylindrical surface. The internal and external cylindrical surfaces are formed with respective confronting aligned internal and external helical screw thread grooves for receiving a fusible substantially helical joint member to form a secure connection between the rocket motor and the warhead. The helical joint member is made of a material having a low melting temperature, preferably a eutectic metal alloy, whereby the heat of a fire or the like will melt the joint member to disconnect the warhead from the rocket motor. The motor tube has a front wall with a vent opening therein, normally closed by a plug member. The adapter ring includes means for retaining the plug member in the vent opening. The melting of the fusible joint member is effective to release the retaining action of the adapter ring, whereby any pressure in the motor tube expels the plug member and the adapter ring from the motor tube.

Joint construction between components of military projectile and

The ignition safety device is mounted on a rocket motor nozzle having a body with a longitudinal nozzle opening having an igniter therein for igniting the propulsion charge of the rocket motor. An electrically operable detonator is mounted in a detonator opening in a housing mounted in the body. An actuator and a locking member are movable in the body between safe and armed positions. The locking member has means operative in its safe position for locking the actuator. Movement of the locking member to its armed position unlocks the actuator. A spring biases the locking member to its safe position. The actuator is adapted to operate a switch which initially short circuits the electrically operable detonator but is operable by the actuator to an armed position in which the detonator is no longer short circuited and is connected to an electrical input circuit including a contact band on the nozzle body. The actuator also operates a gate between a safe position, in which the gate blocks any transmission of explosive energy between the detonator opening and an exit opening, and an armed position, in which the gate unblocks the exit opening for the transmission of explosive energy thereto. An explosive lead is connected between the exit opening and the igniter.

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Bedford, TX, United States of America

James E Goble