Ammunition and explosives – Igniting devices and systems
Patent
1974-06-26
1976-05-11
Pendegrass, Verlin R.
Ammunition and explosives
Igniting devices and systems
F42B 302
Patent
active
039555046
ABSTRACT:
A casing or shell for explosive material to be used as a booster for detonating massive charges of blasting agents of low sensitivity is formed in two generally hemispherical half shell or casing members which are formed with sufficient precision that the two parts may lock together in telescoped relationship after filling, to form a liquid-tight joint. The two half shells are quite similar in size and shape but not identical, one bearing a flange having a hollow cylindrical inner surface into which a mating flange on the other is received; interlocking elements inside the outer flange and on the exterior surface of the inner flange hold the parts securely together by friction and without adhesive after full assembly. Each half shell includes a thin-walled tubular element which projects through and frictionally engages an opening in the other half shell as the two members are assembled, the parts being so arranged that a filling port and an air outlet port are provided when the parts are brought together but only partially closed to final position, these ports being closed completely when the two half shells are finally forced tightly together. The tubular elements are designed to receive and hold a primary detonator, such as an electric blasting cap or a length of detonating cord, and to hold such detonator securely in place after the booster is filled and sealed.
REFERENCES:
patent: 1997958 (1935-04-01), Wingard
patent: 3613582 (1971-10-01), Levamaki
patent: 3831522 (1973-03-01), Romney
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