F - Mech Eng,Light,Heat,Weapons – 42 – B
Patent
F - Mech Eng,Light,Heat,Weapons
42
B
F42B 1/00 (2006.01) F42D 1/04 (2006.01)
Patent
CA 2559981
An initiator for a secondary explosive receptor charge is provided by forming a length of detonating cord into a helical coil containing a plurality of windings with a cut-off barrier provided by e.g., a separating rib between adjacent windings. The adjacent windings may be not more than about 0.5 inch (12, 7 mm) apart. The detonating cord may be wound about a spindle which may optionally provide the separating rib. The coil may be a tapered coil which may define a taper angle of e.g., from about 2 to 4 degrees. Alternatively, the coil may be a cylindrical coil, or the cord may be configured. in a planar spiral. Optionally, the detonating cord in the helical coil may have a core of explosive material with a loading of less than 15 grains per foot of the cord, e.g., less than 12 grains per foot of the cord, or a loading in the range of from 8 to 12 grains per foot of the cord. The coil may consume about six inches of the cord. Conversely, the detonating cord in the spiral may have a core of explosive material with a loading of at least 2.5 grains per foot, optionally at least 15 grains per foot of the cord.
Badger Farrell G.
Bahr Lyman G.
Lee Robert A.
Sutula Daniel P.
Dyno Nobel Inc.
Sim & Mcburney
LandOfFree
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