C - Chemistry – Metallurgy – 06 – C
Patent
C - Chemistry, Metallurgy
06
C
102/36
C06C 7/00 (2006.01) F42B 3/16 (2006.01) F42C 9/00 (2006.01)
Patent
CA 1197139
TITLE Delay Detonator ABSTRACT OF THE DISCLOSURE Improved uniformity of timing, and particularly reduced sensitivity of timing to minor variations in delay charge size, are achieved in delay detonators by placing a loose load of a flame-sensitive ignition composition between a pressed delay charge and an ignition assembly, e.g., a percussion primer, a the actuation end of the detonator. The loose ignition charge has a free surface and is adapted to be ignited in response to direct contact with flame emitted from the ignition of a charge in the ignition assembly. Preferably, the delay charge is pressed into a plastic carrier which, in a non-electric detonator, has an open end terminating between the walls of the detonator shell and a primer shell that closes the actuation end of the detonator and the ignition charge is loosely loaded into a metal capsule seated against the delay charge.
399784
Eti Canada Inc.
Mccallum Brooks & Co.
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