Composite cartridge casing and method of assembly

Details Composite cartridge casing and method of assembly Composite cartridge casing and method of assembly

1975-02-06

1976-08-31

Pendegrass, Verlin R.

Ammunition and explosives

Igniting devices and systems

102 44, F42B 706

Patent

active

039773264

ABSTRACT:
A composite cartridge casing having a plurality of component parts, which may be of dissimilar materials such as metal and plastic, includes a tubular casing body formed with a mouth portion for receiving a projectile and with a breech portion which has a cylindrical interior wall extending forwardly from an opening in its base. An annular bridge insert member has a forward cup portion which is receivable through the base opening into the casing body, a rearward skirt portion of reduced diameter, and a frusto-conical central portion connecting the cup and skirt portions. After insertion of the bridge insert, the breech portion of the casing body is deformed and reduced to engage the frusto-conical and skirt portions, thereby securing the assembly and forming an extraction groove around the base of the casing. A head assembly is then attached to the base to complete the casing.

REFERENCES:
patent: 3099958 (1963-08-01), Daubenspeck et al.
patent: 3690256 (1972-09-01), Schnitzer
patent: 3842739 (1974-10-01), Scanlon et al.

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