Ammunition and explosives – Igniting devices and systems
Patent
1976-07-06
1978-05-09
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
102 192, F42C 1100, F42C 1514
Patent
active
040880753
ABSTRACT:
The firing circuit comprises a direct current voltage source having negat and positive terminals connected, respectively, to first and second terminals of a firing network. The network comprises first and second resistors connected, respectively, to the first and second network terminals. A diode, a silicon controlled rectifier (SCR), an electrical detonator and a third resistor are connected in series with each other and in parallel with the first and second terminals, respectively, with the anode of the diode connected to the cathode of the SCR, and the gate of the SCR connected to the junction of the first and second resistors. A capacitor and a fourth resistor are connected in parallel with the combination of the SCR and the detonator. In a modification, a Zener diode is connected in parallel with the capacitor. The circuit is designed to be normally energized without firing the SCR and detonator, and to fire the SCR and detonator if: the voltage source is (1) suddenly disconnected from the network or (2) rapidly decreased; or (3) the input terminals of the network are short-circuited, or (4) too high a voltage is applied to the network.
REFERENCES:
patent: 3504632 (1970-04-01), West et al.
patent: 3575114 (1971-04-01), Quist et al.
patent: 3598056 (1971-08-01), West et al.
patent: 3665860 (1972-05-01), West
patent: 3690259 (1972-09-01), Piazza et al.
patent: 3750586 (1973-08-01), Swallow et al.
Edelberg Nathan
Erkkila A. Victor
Jordan Charles T.
The United States of America as represented by the Secretary of
Webb Thomas R.
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