Device in blasting cap for low-energy fuse

Details Device in blasting cap for low-energy fuse Device in blasting cap for low-energy fuse

F - Mech Eng,Light,Heat,Weapons

42

C

102/30

F42C 19/00 (2006.01) C06C 7/00 (2006.01) F42D 1/04 (2006.01)

Patent

CA 1147595

ABSTRACT OF THE DISCLOSURE The device which is disclosed includes a hose which can be made of plastic and which transfers a blast wave or det- onation from one end to the other. The blasting cap consists of a cover which is open at one end and which for example is made of metal or plastic. The cover contains one or several explosives wherein one of them can be a delay detonator. One end of the low energy fuse can be inserted and fastened at one end of the cover. The device is also characterized by the fact that in the blasting cap, between the location where a fuse can be inserted and the surface of the explosive, and facing the said location, there is provided a fixed moisture proof barrier, which is such that its effect is nullified by the blast wave which penetrates into the blasting cap. The moisture proof barrier is made up of a substantially diffusion tight rigid tube inserted into one end of the fuse which is inserted into the blasting cap. The tube is provided with an outwardly direct- ed end flange which lies against or close to the end surface of the tube. The tube is sealed to the end flange by means of a diffusion tight film or foil which can be penetrated by a blasting wave. This device makes the blasting cap insensitive to the moisture which the fuse will have to accept because of the required mechanical durability.

325099

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