Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1991-04-10
1992-06-30
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
102213, H01J 516
Patent
active
051265591
ABSTRACT:
An arrangement used in safing and arming a munition device. The pressure sensor responds to pressure generated by igniting propellant of the munition and displaces from a first to second position. The power supply responds to setback of the munition to generate an electrical voltage. The light-emitting device responds to the electrical voltage. The photosensitive device connected to the power supply is powered by generation of the voltage and responds to receipt of light energy. An electro-explosive actuator connected to the photosensitive device is operable in response to electrical energy to actuate a rotor of the munition fuze from an unarmed condition to an armed condition. A fiber optic routing element defines a light transmission path from the light-emitting device to the photosensitive device via the pressure sensor. The pressure sensor responds to contact by expanding high pressure gases generated from igniting of the propellant to move from the first to second position and transmit sufficient light energy from the light-emitting device to the photosensitive device via a reflective surface of the pressure sensor at the second position to cause the photosensitive device to conduct electrical energy to the electro-explosive actuator. The actuator thus does not actuate the rotor fuze from the unarmed condition to armed condition without both setback and propellant ignition occurring first.
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Alliant Techsystems Inc.
Arrett Jane H.
Flanagan John R.
Nelms David C.
Shami Khaled
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