Electrostatic safe electric match

Details Electrostatic safe electric match Electrostatic safe electric match

1980-12-17

1983-04-26

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

Accidental fuse ignition prevention means

10220211, F42B 318

Patent

active

043809588

ABSTRACT:
A safe electroexplosive device such as an electric match is provided by cring the existing electric match with a coating that prevents electrostatic discharge penetration of the coating. The coating may be either an inner insulator with a conductive outer layer or it may be just a conductive layer over the match. Use of the insulator coating allows an open-circuit terminal to remain once the device is initiated by its power source. Use of only the conductive coat requires the coat to have a resistance greater than the match bridgewire circuit resistance and leaves a low resistance path across the power source after the device has been fired.

REFERENCES:
patent: 2478838 (1949-08-01), Rolland
patent: 2741179 (1956-04-01), Taylor et al.
patent: 2995086 (1961-08-01), Scott
patent: 3415189 (1968-12-01), Trevorrow
patent: 3610153 (1971-10-01), Betts et al.
patent: 3717096 (1973-02-01), Ward
patent: 3930449 (1976-01-01), Buchele
patent: 4152988 (1979-05-01), Haas et al.

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