Accession Number : ADD015899

Title :   Mechanical Shielding for Electric Primer.

Descriptive Note : Patent, Filed 27 Apr 92, patented 4 May 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Goetz, Raymond J

Report Date : 04 May 1993

Pagination or Media Count : 9

Abstract : An electric primer for cartridge ammunition (e.g., Phalanx 20 mm cartridges) is designed to minimize antenna coupling, capacitive coupling, and aperture coupling of stray electromagnetic radiation thereinto for avoiding accidental primer detonation with resulting ignition of cartridge propellant. The primer is provide with a button electrode which is deeply recessed totally behind a small diameter access aperture which physically guards the button electrode from antenna and capacitive coupling. Furthermore, the small opening channels stray radiation about its periphery rather than admitting it to the button.

Descriptors :   *CARTRIDGES, *ELECTRIC PRIMERS, *ELECTROMAGNETIC RADIATION, *ELECTROMAGNETIC SHIELDING, *PATENTS, *ANTENNA COUPLERS, *ELECTRIC CONDUCTORS, ACCESS, AMMUNITION, APERTURES, DETONATIONS, DIAMETERS, ELECTRODES, IGNITION, PROPELLANTS, ELECTRIC IGNITION, FREQUENCY, PROJECTILES, PYROTECHNICS, ELECTROMAGNETIC ENVIRONMENTS

Subject Categories : Ammunition and Explosives
      Electromagnetic Shielding

Distribution Statement : APPROVED FOR PUBLIC RELEASE