Shock insensitive initiating devices

Details Shock insensitive initiating devices Shock insensitive initiating devices

1994-02-14

1995-02-28

Nelson, Peter A.

Ammunition and explosives

Blasting

Contained blasting charge

10227511, 1491086, F42B 300

Patent

active

053927133

ABSTRACT:
The invention relates to a shock insensitive explosive train initiating dce including a thin elongated metal casing containing a quantity of hydrated metal picrate therein, a thermite igniter composition disposed adjacent to the hydrated metal picrate charge and an ignition means selected from ignition means consisting of an electric match and a length of fuze cord. In a specific example, the hydrated metal picrate charge is barium picrate hydrate which may be disposed in an open (FIG. 1) or a sealed (FIG. 2) copper or aluminum casing. In the embodiment of FIG. 3, a tin/zinc alloy, protective, safety cover is disposed over a portion of the hydrated metal picrate. This safety cover has a low melting point (200.degree. C.) and is adapted to melt in the event of a fire to thereby "unconfine" the hydrate metal picrate charge prior to it reaching explosion temperature of approximately 341.degree. C.

REFERENCES:
patent: 3509820 (1970-05-01), Fitch et al.
patent: 3759216 (1973-09-01), Sanders et al.
patent: 4762067 (1988-08-01), Barker et al.
patent: 5035756 (1991-07-01), Covino

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