Ignition safety device for a rocket motor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 1995
Grant Date -
N/A
app pub date -
Nov 16, 1993
filing date -
Nov 16, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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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