Plastics projector charge cartridge case

Claim 1

A PROJECTER CHARGE CARTRIDGE CASE FOR A CARTRIDGE FOR USE WITH A WEAPON HAVING A TAIL TUBE ADAPTED TO BE TELESCOPED OVER A FIRING POST, SAID CARTRIDGE BEING ADAPTED TO BE DISPOSED BETWEEN THE FREE END OF THE FIRING POST AND THE INTERIOR END OF THE TAIL TUBE AND SERVING WHEN FIRED TO PROPEL THE WEAPON OFF THE FIRING POST, SAID CARTRIDGE CASE COMPRISING: A GENERALLY DISC SHAPED METAL BASE HAVING AN ANNULAR UNDERCUT GROOVE IN ONE FACE THEREOF, A HOLLOW CYLINDRICAL PLASTICS CASE BODY SECURED TO SAID BASE, SAID CASE BODY HAVING AN ANNULAR PROTRUDING PORTION THEREON, SAID PROTRUDING PORTION ENTERING AND FILLING SAID UNDERCUT GROOVE, SAID CASE BODY BEING FORMED WITH AN ANNULAR PORTION OF REDUCED CROSSSECTION AT A LOCATION ADJACENT TO PERIPHERY OF SAID METAL BASE, WHEREBY SAID CASE BODY IS WEAKENED AT THIS LOCATION SO THAT, WHEN THE CARTRIDGE IS FIRED, SEPARATION TAKES PLACE AT SAID LOCATION AND A RING OF PLASTIC MATERIAL IS LEFT ATTACHED TO THE BASE, THE EDGE OF SAID RING CONTACTING THE INTERIOR CYLINDRICAL SURFACE OF SAID TAIL TUBE AND ACTING AS A SLIDING SEAL THEREIN, AND AN END CAP SEALINGLY SECURED TO AND CLOSING THE END OF SAID CASE BODY OPPOSITE SAID BASE.