Ammunition and explosives – Igniting devices and systems – Holders for fuse or fuse cord to blasting cartridge,...
Patent
1985-05-01
1987-01-20
Brown, David H.
Ammunition and explosives
Igniting devices and systems
Holders for fuse or fuse cord to blasting cartridge,...
1022753, 1022754, 1022755, F42B 310, C06C 504
Patent
active
046373128
ABSTRACT:
A carrier for supporting a primer explosive charge in operative relationship to initiating means therefor comprises a cup having a recessed portion in its closed bottom end for engaging an explosive-containing plastic connecting block, used to explosively couple a low-energy detonating cord (LEDC), threaded through a tunnel in the cup, to a percussion-actuated detonator seated in a cavity (cap well) in the cup. A number of such primers can be made to slide on a single LEDC downline for placement in decked explosive charges in a borehole. Two tubular members project into the cup from the recessed portion, forming one or two cord-threading tunnels and a cap well. Besides initiation of a detonator by an LEDC downline via the explosive coupler, the carrier allows the primer charge to be initiated by a high-energy detonating cord or an electric detonator in an axial tunnel in the cup, or by a length of LEDC threaded through a tunnel and connected to a non-electric detonator seated in the cap well.
REFERENCES:
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patent: 4527482 (1985-07-01), Hynes
Adams Philip E.
McGowan Michael J.
Yunan Malak E.
Brown David H.
E. I. Du Pont de Nemours and Company
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