초록 ▼

An explosive booster cap containing a confined detonable charge, said confinement providing a high degree of water protection for said detonable charge, but which confinement will, when the booster cap is subjected to a fire or excessive heat, be disrupted to allow for outgassing and burning of the

An explosive booster cap containing a confined detonable charge, said confinement providing a high degree of water protection for said detonable charge, but which confinement will, when the booster cap is subjected to a fire or excessive heat, be disrupted to allow for outgassing and burning of the detonable charge without explosion. Confinement of the detonable charge is provided by a thermoplastic plug inserted into the open end of the booster cap. The physical properties of the thermoplastic plug permit the plug to deform when heated to a temperature between the decomposition and initiation temperatures of the explosive. The booster cap is slipped over the detonable end of the blasting cap, the resultant combination providing a substantially enhanced explosive output.

대표청구항 ▼

A water-proof blasting cap booster adapted to allow insertion of a blasting cap therein that will not detonate when subjected to fire or excessive heat comprising: (a) an elongated shell having an open end and a closed end, said open end being adapted to permit the insertion and frictional engagemen

A water-proof blasting cap booster adapted to allow insertion of a blasting cap therein that will not detonate when subjected to fire or excessive heat comprising: (a) an elongated shell having an open end and a closed end, said open end being adapted to permit the insertion and frictional engagement of the end of the blasting cap with said open end; (b) a detonable explosive contained with said shell; (c) a thermoplastic plug having a softening point temperature between the decomposition and initiation temperatures of said explosive, coaxially mated within the open end of said elongated shell to provide a water-tight confinement of said explosives under normal conditions but where said plug deforms and said confinement terminates when said blasting cap booster is subjected to a temperature that causes at least 5% of the explosive to decompose.