Ammunition and explosives – Igniting devices and systems – Electrical primer or ignitor
Patent
1988-07-01
1990-03-13
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Electrical primer or ignitor
1022025, F42B 318, F42B 310
Patent
active
049075098
ABSTRACT:
A column of explosive in a low-voltage detonator which makes it bonfire-safe includes a first layer of an explosive charge of CP, or a primary explosive, and a second layer of a secondary organic explosive charge, such as PETN, which has a degradation temperature lower than the autoignition temperature of the CP or primary explosives. The first layer is composed of a pair of increments disposed in a bore of a housing of the detonator in an ignition region of the explosive column and adjacent to and in contact with an electrical ignition device at one end of the bore. The second layer is composed of a plurality of increments disposed in the housing bore in a transition region of the explosive column next to and in contact with the first layer on a side opposite from the ignition device. The first layer is loaded under a sufficient high pressure, 25 to 40 kpsi, to achieve ignition, whereas the second layer is loaded under a sufficient low pressure, about 10 kpsi, to allow occurrence of DDT. Each increment of the first and second layers has an axial length-to-diameter ratio of one-half.
REFERENCES:
patent: 2237932 (1941-04-01), Handforth et al.
patent: 3035474 (1962-05-01), LaBash, Jr. et al.
patent: 3186341 (1965-06-01), Bjorklund et al.
patent: 3208379 (1965-09-01), McKee et al.
patent: 3257946 (1966-06-01), Tognola
patent: 3264988 (1966-08-01), Rucker
patent: 3277824 (1966-10-01), Bankston
patent: 3286628 (1966-11-01), Young et al.
patent: 3324793 (1967-06-01), Thomas
patent: 3618523 (1971-11-01), Stresau et al.
patent: 3726217 (1973-04-01), Dedman et al.
patent: 4517895 (1985-05-01), Rucker
Chafin James H.
Jordan Charles T.
McMillan Armand
Moser William R.
The United States of America as represented by the United States
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