Electrical timing arrangements and methods

Details Electrical timing arrangements and methods Electrical timing arrangements and methods

1989-11-16

1991-07-16

Kyle, Deborah L.

Ammunition and explosives

Igniting devices and systems

Ignition or detonation circuit

89 1814, 89 1812, F42C 1106

Patent

active

050315374

ABSTRACT:
A circuit arrangement for electrically firing a load, such as the rocket motor of a projectile, at a predetermined time after it has been ejected from a predetermined path (such as the barrel of a gun) comprises a capacitor which is charged up through bore-rider contacts sensing ejection of the projectile, a resistor and two diodes. A further diode blocks a capacitor discharge path in which the load is connected. Closure of the bore-rider contacts initiates two timers. These are of different type, so as to minimize the risk of double failure, and have the same predetermined time period. At the end of this period, they respectively close switches which abruptly shifting the potential on the positive plate of the capacitor to zero. The diode 32 in the capacitor discharge path is now unblocked and discharge current passes through the load and fires it.

REFERENCES:
patent: 4095527 (1978-06-01), Moore
patent: 4776277 (1988-10-01), Fiedler et al.
patent: 4825765 (1989-05-01), Ochi et al.

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