Electrically detonated explosive device

Details Electrically detonated explosive device Electrically detonated explosive device

1976-07-22

1977-09-27

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

102 702R, F42C 300

Patent

active

040503828

ABSTRACT:
A safety circuit for a marine signal device adapted to be fired after being dropped into sea water. The device has a casing which will allow the water to enter when ready for firing. A salt water battery, a water pressure operated switch and an electric blasting cap are all connected in series within the casing. A resistor of selected value is connected across the terminals of the battery so that the battery will be discharged in a predetermined time if the blasting cap fails to be detonated by the action of water pressure on the switch at a predetermined depth. Furthermore, a shunt is provided between the leads of the blasting cap to reduce the hazards during handling due to static charges or radio frequencies. The shunt may be manually removed prior to firing or in one embodiment the pressure operated switch automatically disconnects the shunt when the switch is operated by water pressure.

REFERENCES:
patent: 2459267 (1949-01-01), Dwyer et al.
patent: 2945441 (1960-07-01), Winslow
patent: 3064576 (1962-11-01), Lytle
patent: 3199453 (1965-08-01), Fasig et al.

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