Reverse ignition cartridge

Abstract

A reverse ignition cartridge for firearms is provided, in which the shape of a powder charge is secured by a diaphragm, made of fast burning material. Shot initiation is produced by igniting the diaphragm by a primer flash through a flash tube disposed in an aperture of said diaphragm. The flash tube extends coaxially through the powder charge from primer to the diaphragm.

1 . In a reverse ignition cartridge having a base at one end with a central aperture therethrough, a primer disposed in said aperture, a propellant powder charge disposed in said cartridge and a flash tube having the first end open and extending from said primer through said powder charge coaxially in said cartridge, the improvement comprising an ignition diaphragm with a central aperture, said ignition diaphragm being pressed down onto said powder charge so as to secure a shape of said powder charge, the second end of said flash tube being disposed in the said aperture of said ignition diaphragm:  
     
     
         2  The reverse ignition cartridge of  claim 1 , wherein said ignition diaphragm has a tapered funnel form so as to provide a directed jet of powder gases predominantly in a direction of longitudinal axis of said cartridge whereby a range of fire is increased.  
     
     
         3 . The reverse ignition cartridge of claims  1  or  2 , wherein the second end of said flash tube is supplied by a combustible element, so as to assure a reliable flash transfer from said primer to said ignition diaphragm.