Ammunition and explosives – Igniting devices and systems
Patent
1977-05-23
1979-09-11
Pendegrass, Verlin R.
Ammunition and explosives
Igniting devices and systems
102 23, 102 27R, F42B 310, F42C 104
Patent
active
041671392
ABSTRACT:
A delay primer unit for detonating an explosive material in a borehole with a detonating cord down line extending into the borehole wherein the unit comprises an explosive element capable of detonating the explosive material upon being detonated, means for preventing direct detonation of the explosive element by the down line and an elongated, flexible time delay detonation element having a first end slidably connected to the down line and a second end connected in detonation relationship with the explosive element and generally movable with respect to the first end. The delay element is used to mount the explosive element on the down line.
REFERENCES:
patent: 2736263 (1956-02-01), Lewis et al.
patent: 2913982 (1959-11-01), Hayes
patent: 4060033 (1977-11-01), Postupack et al.
patent: 4060034 (1977-11-01), Bowman
Gleason David M.
Vickers Robert V.
Austin Powder Company
Pendegrass Verlin R.
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