CARTRIDGE AND A METHOD OF PRODUCING THE SAME
First Claim
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1. A cartridge comprising:
- a case having a cylindrical main body portion closed at the rear end thereof and containing a propellant charge, a cylindrical mouth portion of a diameter less than the diameter of said main body portion, and a hollow frusto-conical neck portion joining said main body portion and said mouth portion;
a holder positioned within said case and having a cylindrical sleeve portion of an outer diameter to contact the interior of said mouth portion of said case, the forward end of said sleeve portion having an annular flange extending outwardly therefrom abutting the forward edge of said mouth portion of said case, the rear end of said sleeve portion merging into a flexible rearwardly converging frusto-conical portion, the length of said sleeve portion being dimensioned such that the point of juncture between said sleeve portion and said frusto-conical portion is positioned rearwardly of the juncture of said neck and mouth portions of said case when said flange abuts said edge of said mouth portion of said case; and
a projectile positioned in said holder in contact with the inner periphery of said sleeve portion, said projectile having adjacent the rear end thereof an annular groove the bottom edge of said frusto-conical portion fitting in said groove, said rear end of said projectile deforming said flexible frustoconical portion of said holder outwardly into compresSion against the inner periphery of said neck portion of said case.
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Abstract
A cartridge comprising a projectile and a cartridge case is formed with a neck at its forward end, and a sleeve-shaped holder for the projectile inserted into the mouth of the neck. A portion of the holder which is conically expanded by the insertion of the projectile bears against the inside of the neck of the cartridge case.
22 Citations
8 Claims
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1. A cartridge comprising:
- a case having a cylindrical main body portion closed at the rear end thereof and containing a propellant charge, a cylindrical mouth portion of a diameter less than the diameter of said main body portion, and a hollow frusto-conical neck portion joining said main body portion and said mouth portion;
a holder positioned within said case and having a cylindrical sleeve portion of an outer diameter to contact the interior of said mouth portion of said case, the forward end of said sleeve portion having an annular flange extending outwardly therefrom abutting the forward edge of said mouth portion of said case, the rear end of said sleeve portion merging into a flexible rearwardly converging frusto-conical portion, the length of said sleeve portion being dimensioned such that the point of juncture between said sleeve portion and said frusto-conical portion is positioned rearwardly of the juncture of said neck and mouth portions of said case when said flange abuts said edge of said mouth portion of said case; and
a projectile positioned in said holder in contact with the inner periphery of said sleeve portion, said projectile having adjacent the rear end thereof an annular groove the bottom edge of said frusto-conical portion fitting in said groove, said rear end of said projectile deforming said flexible frustoconical portion of said holder outwardly into compresSion against the inner periphery of said neck portion of said case.
- a case having a cylindrical main body portion closed at the rear end thereof and containing a propellant charge, a cylindrical mouth portion of a diameter less than the diameter of said main body portion, and a hollow frusto-conical neck portion joining said main body portion and said mouth portion;
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2. A cartridge as claimed in claim 1, wherein said projectile has an annular driving band fitted thereto, said driving band abutting the forward surface of said flange of said holder.
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3. A cartridge as claimed in claim 1, wherein said frusto-conical portion of said holder has holes therein.
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4. A cartridge as claimed in claim 1, wherein said frusto-conical portion of said holder has slits therein.
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5. A process for assembling a cartridge comprising:
- providing a case having a cylindrical main body portion closed at the rear end thereof, a cylindrical mouth portion of a diameter less than the diameter of said main body portion, and a hollow frusto-conical neck portion joining said main body portion and said mouth portion;
providing a holder having a cylindrical sleeve portion merging at the rear end thereof into a flexible rearwardly converging frusto-conical portion;
inserting said holder, with said frusto-conical portion first, into said mouth portion of said case, such that the outer periphery of said sleeve portion of said holder contacts the inner periphery of said mouth portion of said case, and to a position such that the juncture of said sleeve portion and said frusto-conical portion of said holder is located rearwardly of the juncture between said mouth portion and said neck portion of said case;
securing said holder against further displacement rearwardly into said case;
inserting for a first distance into said holder a projectile with the outer periphery thereof contacting the inner periphery of said sleeve portion of said holder;
inserting said projectile a further distance into said holder, and by the rear end of said projectile forcing said flexible frusto-conical portion of said holder radially outwardly into compression with the inner surface of said neck portion of said case, thereby securing said holder against forward displacement in said case; and
securing said projectile against further displacement in said holder;
- providing a case having a cylindrical main body portion closed at the rear end thereof, a cylindrical mouth portion of a diameter less than the diameter of said main body portion, and a hollow frusto-conical neck portion joining said main body portion and said mouth portion;
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6. A process as claimed in claim 5, wherein said sleeve portion of said holder has an annular flange extending outwardly from the forward end thereof, and said holder is secured against further displacement rearwardly into said case by abutting said flange against the forward edge of said mouth portion of said case.
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7. A process as claimed in claim 6, wherein said projectile has an annular driving band fitted thereto, and further displacement of said projectile rearwardly into said holder is prevented by abutting said driving band against said flange of said holder.
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8. A process as claimed in claim 5, wherein said projectile has adjacent the rear end thereof an annular groove, and the bottom edge of said frusto-conical portion of said holder is engaged in said annular groove when said projectile is inserted into said holder.
Specification