Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent
1994-10-14
1995-12-19
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Ignition or detonation circuit
102206, F42C 1100, F23Q 702
Patent
active
054760445
ABSTRACT:
An electronic safe/arm device is powered internally by a low-voltage, periodic power source that has insufficient voltage by itself to fire the detonator. The circuit therefore includes a step-up transformer from which sufficient voltage to fire the detonator is obtained. The step-up transformer charges an arming circuit which stores high-voltage power to fire the detonator and also powers the firing circuit which discharges the stored high-voltage energy through the detonator at the appropriate time, to fire the device. The low-voltage, periodic power source may include a low-voltage battery and a dynamic switch for providing periodic pulses of low-voltage energy to the primary winding of the transformer, and the dynamic switch may be powered from the output of the transformer, so that the low-voltage battery has insufficient voltage to power the dynamic switch. Accordingly, high-voltage energy derived from the output of the transformer is required to operate the circuit, providing assurance that the device will not fire if the circuit is damaged.
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Jordan Charles T.
Libert Victor E.
Spaeth Frederick A.
The Ensign-Bickford Company
Wesson Theresa M.
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