초록

A telescopic training round has an inner sealant disc with a central hole to ensure against gas leakage as the casing expands telescopically.

대표청구항 ▼

1. A telescopically expanding cartridge for use in blow-back operated firearms comprising:1) a casing with a head end portion including a cartridge head end fitted to a sleeve and a chambering portion at least partially positioned within said sleeve; 2) the chambering portion being telescopically in

1. A telescopically expanding cartridge for use in blow-back operated firearms comprising:1) a casing with a head end portion including a cartridge head end fitted to a sleeve and a chambering portion at least partially positioned within said sleeve; 2) the chambering portion being telescopically interfitted with said sleeve with a containing engagement, said chambering portion having a forward end, remote from the head end, and a rearward end defining a cavity containing a propellant to evolve gas on firing; 3) the chambering portion comprising a longitudinal passageway extending from its forward end to its rearward end; 4) a recess or protrusion formed in the rearward end of the chambering portion; 5) a sealing disc having a complementary disc protrusion or disc recess interfitted into said recess or protrusion and an annular portion overlying the rearward end of the chambering portion, extending to form at its outer circumferential perimeter a sealing contact with said sleeve, wherein the sealing disc is pierced by a hole to allow a metered release through the longitudinal passageway of gas evolving from within the cartridge cavity upon firing.