Accession Number : ADD008812

Title :   Percussion Primer for Cartridge Actuated Devices.

Descriptive Note : Patent Application,


Personal Author(s) : Beard,Bryan F ; Valenta,Frank J

Report Date : 24 Jun 1981

Pagination or Media Count : 11

Abstract : A percussion primer for cartridge actuated devices is disclosed. A moisture/oil resistant disc retains, supports, and environmentally seals the explosive charge within a cavity against the closed end of the primer cup. The disc, is retained against the charge by a support ring having flash holes that allow the burning gases to escape into an expansion chamber to initiate a pyrotechnic charge. A retaining ring is press fit into the open end of the primer cup to retain the support ring and disc. The support ring, retaining ring and disc provide environmental and vibration resistance, stable assembled height of the primer, and no requirement to reconsolidate the charge when the primer is assembled into the cartridge. The support ring also functions as a flat anvil to initiate functioning of the explosive charge. Two alternative embodiments incorporate either an extension of, or a spike-like projection into, the cavity to pinch the charge, or to concentrate at a point, the impact force exerted by the firing pin on the primer. (Author)

Descriptors :   *Patent applications, *Primers, Explosives initiators, Hermetic seals, Explosive charges, Cartridges(PAD), Firing pins, Impact

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE