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US 6,272,993 B1Granted
Electric primer
AssigneeRA Brands, L.L.C.
InventorsTodd D. Cook, Dale R. Danner, John M. Dwyer, Jr., Frances G. Lopata, Diane Ronkainen, David K. Schluckebier, Robert B. Shanks, Jeffrey W. Stone, Spencer D. Wildman
Life of this patent
Estimating the term…
Abstract
Electric primers for the discharge of ammunition suitable for use with small arms.
Claims19
An electric primer for small arms ammunition comprising:
- (a) an electrically conductive cup having an open top and a bottom having an aperture formed in the bottom;
- (b) an electrically insulating liner within the cup, the liner formed from at least one polymeric material resistant to chemicals, having an Impact Toughness of at least about 1.12 ft-lb/in, a Heat Distortion Temperature at 264 psi stress of at least about 289° F., and a Modulus of Elasticity of at least about 319,000 psi;
- (c) at least one electrically conductive explosive composition within the insulating liner and the cup;
- (d) an electrically conductive contact positioned between the explosive and the bottom of the cup, the contact having a portion extending toward the aperture in the bottom of the cup;
- and
- (e) a retaining means on top of the explosive;
- wherein the liner is positioned to electrically insulate the cup from the contact, and wherein the liner has at least one means for retaining the electrically conductive contact within the cup after discharge of the explosive.
4 more elements
An electric primer for small arms ammunition comprising:
- (a) an electrically conductive cup having an open top and a bottom having an aperture formed in the bottom;
- (b) an electrically insulating liner within the cup, the liner formed from at least one polymeric material resistant to chemicals, having an Impact Toughness of at least about 1.12 ft-lb/in, a Heat Distortion Temperature at 264 psi stress of at least about 289° F., and a Modulus of Elasticity of at least about 319,000 psi;
- (c) at least one electrically conductive explosive composition within the insulating liner and the cup;
- (d) an electrically conductive contact positioned between the explosive and the bottom of the cup, the contact having a portion extending toward the aperture in the bottom of the cup;
- and
- (e) a retaining means on top of the explosive comprising a lacquer containing at least about 0.5% by weight of carbon fiber;
- wherein the liner is positioned to electrically insulate the cup from the contact, and wherein the liner has at least one means for retaining the electrically conductive contact within the cup after discharge of the explosive.
4 more elements
An electric primer for small arms ammunition comprising:
- (a) an electrically conductive cup having an open top and a bottom having an aperture formed in the bottom;
- (b) an electrically insulating liner within the cup, the liner formed from at least one polymeric material resistant to chemicals, having an Impact Toughness of at least about 1.12 ft-lb/in, a Heat Distortion Temperature at 264 psi stress of at least about 289° F., and a Modulus of Elasticity of at least about 319,000 psi;
- (c) at least one electrically conductive explosive composition within the insulating liner and the cup;
- (d) an electrically conductive contact positioned between the explosive and the bottom of the cup, the contact having a portion extending toward the aperture in the bottom of the cup;
- and
- (e) a retaining means consisting essentially of lacquer comprising at least about 0.5% by weight of carbon fiber on top of the explosive;
- wherein the liner is positioned to electrically insulate the cup from the contact.
4 more elements
An electric primer for small arms ammunition comprising:
- (a) an electrically conductive cup having an open top and a bottom having an aperture formed in the bottom;
- (b) an electrically insulating liner within the cup, the liner formed from at least one polymeric material resistant to chemicals, having an Impact Toughness of at least about 1.12 ft-lb/in, a Heat Distortion Temperature at 264 psi stress of at least about 289° F., and a Modulus of Elasticity of at least about 319,000 psi;
- (c) at least one electrically conductive explosive composition within the insulating liner and the cup;
- (d) an electrically conductive contact positioned between the explosive and the bottom of the cup, the contact having a portion extending toward the aperture in the bottom of the cup;
- and
- (e) a retaining means comprising a foil consisting essentially of metal and a lacquer having at least about 0.5% by weight carbon fiber on top of the explosive;
- wherein the liner is positioned to electrically insulate the cup from the contact.
4 more elements
Dependencies are inferred from the claim text.