Resistance after firing protected electric match

Details Resistance after firing protected electric match Resistance after firing protected electric match

1980-03-20

1981-11-10

Nelson, Peter A.

Ammunition and explosives

Igniting devices and systems

Electrical primer or ignitor

F42C 1300

Patent

active

042991684

ABSTRACT:
An electric match having electrical leads embedded in flame-producing compound is protected against an accidental resistance across the leads after firing by a length of heat-shrinkable tubing encircling the match body and having a skirt portion extending beyond the leads. The heat of the burning match and an adjacent thermal battery causes the tubing to fold over the end of the match body, covering the ends of the leads and protecting them from molten pieces of the battery.

REFERENCES:
patent: 3048507 (1962-08-01), Zebree
patent: 3332350 (1967-07-01), Morfy
patent: 3415189 (1968-12-01), Treyorrow
patent: 3587467 (1971-06-01), Menke et al.
patent: 3640223 (1972-02-01), Olsson
patent: 3717096 (1973-02-01), Ward
patent: 3910188 (1975-10-01), Stevens
patent: 4152988 (1979-05-01), Haas et al.

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