Primers

Details Primers Primers

1991-06-05

1992-10-20

Johnson, Stephen M.

Ammunition and explosives

Igniting devices and systems

Percussion primers or ignitors

102470, F42C 1910

Patent

active

051572192

ABSTRACT:
A firing pin initiated primer intended to withstand extreme loading forces, includes a capsule having an opening defined by a continuous, deformable side wall and being deformable by the firing pin impacting upon the capsule at the opposite end thereof, an anvil surrounded the capsule, and having an upper portion with a cross section substantially corresponding to that of the capsule, an unbroken lower suppport surface facing the capsule, at the end opposite to the opening and a sealing surface adjacent to the support surface, at least one radial channel formed in the anvil adjacent the sealing surface and extending from the periphery towards the center and converging into an axial channel defined in the anvil, a compartment defined by the supporting surface and bottom and side walls of the capsule and containing a pyrocharge therein, which has the entire upper surface abutting the unbroken support surface of the anvil, and at least one gap formed longitudinally outside of the capsule allowing for the partial deformation of the side wall of the capsule outwardly into the gap upon ignition of the pyrocharge so that the flame jets of the pyrocharge may pass the sealing surface and reach into the at least one radial channel.

REFERENCES:
patent: 387723 (1888-08-01), Lovenz
patent: 3195463 (1965-07-01), Foote et al.
patent: 3306203 (1967-02-01), Schaadt et al.
patent: 3726221 (1973-04-01), White
patent: 3771453 (1973-11-01), Ciccone et al.
patent: 4083307 (1978-04-01), Beermann et al.
patent: 4619202 (1986-10-01), Romer et al.
patent: 4686905 (1987-08-01), Szabo

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