Time delay primer and method of making same

Details Time delay primer and method of making same Time delay primer and method of making same

F - Mech Eng,Light,Heat,Weapons

42

C

102/36

F42C 9/00 (2006.01) F42D 1/06 (2006.01)

Patent

CA 1084341

TIME DELAY PRIMER AND METHOD OF MAKING SAME Abstract of the Disclosure An improved delay primer unit for detonating an ex- plosive material in a borehole with a detonating cord down line extending into the borehole. The primer comprises an explosive element capable of detonating the explosive ma- terial upon being detonated, means for preventing direct detonation of the explosive element by the down line, a time delay detonating element extending between the down line and the explosive element with a known detonation time delay value between first and second ends of the delay element, means slidably associating the first end with the down line and means for connecting the second end in detonation relation- ship with the explosive element. The improvement in this type of unit is the provision of the explosive element as a support element and a detonating cord wrapped around the support element to form a primer.

293882

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