US 6,205,927 B1 · Electric impulse cartridge

Abstract

An electric pyrotechnic cartridge or primer device comprises a generally cylindrical nonconductive plastic body having a conical cavity opening to one end wall, a rod-like electrode centered in the cavity and extending to the opposite end wall and a second rod-like electrode extending from a side wall of the body into the cavity in proximity to but spaced from the first electrode. Alternatively, the second electrode may comprise a coating of conductive material applied to a conical wall surface defining the cavity. An explosive or pyrotechnic charge is disposed in the cavity and is ignited by a high voltage electric signal imposed on the electrodes. The electrodes are preferably formed of an ABS plastic composition which may be filled or doped with carbon, carbon fibers, metal particles, aluminized fiberglass, and explosive compositions selected from combinations of boron, molybdenum trioxide, magnesium, barium chromate, potassium perclorate, a fluoroelastomer and polytetrafluoroethylene. Electrodes formed of ABS plastic composition filled with carbon or metal particles provide a reduced firing time on the imposition of the electric signal on the device, and consumable electrodes formed of ABS and a combination of the explosive compositions has a further reduced firing time and imposition of substantial energy on an explosive composition in the cavity.

Claims24

Dependent claims

An electric cartridge comprising:

a substantially electrically nonconductive body having a first end wall and a second end wall spaced from said first end wall and a cavity formed in said body;
a first electrode having an end extending into said cavity;
and
a second electrode spaced from said end of said first electrode in said cavity, at least one of said electrodes being combustible upon transmitting an electric current firing signal therethrough to initiate firing of said cartridge.

1 more element

An electric cartridge comprising:

a substantially electrically non-conductive cylindrical body having a, first transverse end wall, a second transverse end wall spaced from said first transverse end wall, a cylindrical outer sidewall interposed said transverse end walls and a generally conical shaped cavity formed in said body and opening to one of said end walls at a base of said cavity;
a first electrode having a distal end extending into said cavity, said first electrode being supported on said body and having a second end extending to said first transverse end wall;
and
a second electrode having a first part extending into said cavity and a second part extending to said sidewall of said body;
said electrodes being formed of compositions which are electrically conductive and are combustible in response to a predetermined electrical signal intensity imposed on said electrodes and wherein, upon imposition of said predetermined electrical signal on said electrodes, an electric arc is generated in said cavity and at least portions of said electrodes are consumed to release energy to ignite a pyrotechnic material disposed in said cavity.

2 more elements

Dependencies are inferred from the claim text.

Electric impulse cartridge

Life of this patent

Electric impulse cartridge

Life of this patent

Abstract

Claims24