Ammunition and explosives – Igniting devices and systems – Electrical primer or ignitor
Reexamination Certificate
2000-08-24
2001-08-14
Tudor, Harold J. (Department: 3641)
Ammunition and explosives
Igniting devices and systems
Electrical primer or ignitor
C102S202100, C102S472000
Reexamination Certificate
active
06272993
ABSTRACT:
BACKGROUND OF THE INVENTION
Electric primers have previously been used for the discharge of a variety of large military arms. With the development of electrically actuated firearms, it has been difficult to provide a primer that can be reliably activated by electrical current but without the risk of activation by undesired sources, such as electrostatic discharge, magnetic fields, electromagnetic radiation such as that emanating from electrical power lines and transformers and radio frequency transmitters while, at the same time, providing a primer of a size appropriate to small arms.
SUMMARY OF THE INVENTION
The present invention provides an electric primer of a size that can be used in small arms ammunition and which functions reliably with such ammunition.
Specifically, the instant invention provides an electric primer for small arms ammunition comprising:
(a) an electrically conductive cup having a bottom and an aperture in the bottom;
(b) an electrically conductive explosive within the cup;
(c) an electrically conductive contact positioned between the explosive and the bottom of the cup, and having a portion extending toward the aperture in the bottom of the cup;
(d) an insulating liner within the cup, separating the cup from the contact, the insulating liner being formed from polymeric material; and
(e) a retaining means on top of the explosive; wherein the conductive explosive is configured to form an electrical path between the electrically conductive contact and the cup; and the insulating liner is configured and fit between the contact and the cup to retain the electrical contact within the cup after discharge of the explosive.
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PEEK™ manufacturer Victrex, Ltd., Material Properties, No date.*
Chang-Meng Hsiung, Mukerrem Cakmak, and James L. White Univer. Of Akron, Crystallization Phenomena in Injection Molding of Poly Ether Ether Ketone and Its Influence on Mechanical Properties, Aug. 1990, vol. 30 No. 16, pp. 967-980.
Cook Todd D.
Danner Dale R.
Dwyer, Jr. John M.
Lopata Frances G.
Ronkainen Diane
R.A. Brands, LLC
Tudor Harold J.
Womble Carlyle Sandridge & Rice PLLC
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