US2189498A - Metal cartridge for shotguns - Google Patents

Description

1940? .J. SPENGLER 8 98 METAL CARTRIDGE FOR SHOTGUNS Filed NOV. 18, 1938 i i 1 fi 2 Patented Feb. 6, 1940 UNITED sm'rss PA E T orri cs Jules Spengler; Mulhouse-Bourtzwiller (Bant- Bhin), France Application November 18, 1938, Serial No. 241.284

' In France April 15, 1938 4 Claims. (Cl. 102-15) Myinvention relates tocartridges for shotguns The outer edge 8 of the ring is preferably and chiefly to cartridges made of light metal, raised after the manner of a dish and may hear more particularly of the type disclosed in my co-' outwardly against the sloping surface of the pending application Serial Number 152,780, filed groove,

July 9, 1937, now Patent Number 2,144,232 of The ring is set in place very easily by forcing January 17, 1939, the ring, the outer diameter of which is larger It has been proposed already to use for closing than the inner diameter of the casing, into said such cartridges a retaining part constituted by casing. When the ring has reached the level oi a yielding metal disk engaging one or more the groove 1, it expands and its edge engages 10 grooves provided inside the metal casing. But the groove 2. 10 such disks show the drawback of screening the Furthermore after charging, the upper end of charge. the cartridge is submitted to a slight restriction My invention has for its object to remove this as shown at 9. drawback by using for closing the cartridge. a What I claim is: retaining ring of yielding metal the outer di- 1. A cartridge for shotguns, comprising a cy- 15 meter of which is larger than the inner diamelindrical metal casing provided with at least one ter of the casing, said ring retaining through its internal annular groove near its outer end, a reperiphery a disk of known type made of amatesilient metal ring, the external diameter of said rial which becomes disintegrated when the shot ring being greater than the internal diameter of is fired. Agglomerated cork has been found to said casing and fitting resiliently in said annular 20 -be of particular interest to this effect. groove, and a closing disc of a material adapted Preferably the outer edge of the ring is raised to be disintegrated at the firing, said closing disc to allow its easy introduction inside the casing being retained by said metal ring and retaining and eventually to provide a bearing for it against a shot and powder charge withinsaid casing. 5 a slope provided to this end inside the groove. 2. A cartridge for shotguns, comprising a cy- Moreover it has been found that it is of advanlindrical metal casing provided with at least one tage to slightly restrict after charging, the upper internal annular groove near its outer end, a opening of the cartridge. This restricted openresilient metal ring having a frustoconical secing has in particular two advantages: firstly the tion, the external diameter of said ring being .30 diameter of the upper part of the cartridge is greater than the internal diameter of said casslightly reduced by means of a smooth outline, ing and fitting resiliently in said annular groove, which renders its introduction into the chamber and a closing disc of a material adipted to be or the gun easier; secondly there is a ballistic disintegrated at the firing, said closing disc beadvantage inasmuch as this restriction gives a ing retained by said metal ring and retaining a greater speed to the charge. shot and powder charge within said casing. 35 v I have described hereinbelow by way of exam- 3. A cartridge for shotguns, comprising a cypie and shown in the accompanying drawing a lindrical metal casing the outer end of which has form of execution at my invention. a portion gradually and slightly reduced in di- Fig. 1 is an axial "cross-section of the whole ameterysaid casing being provided near said 40 cartridge. outer end with at least one internal annular 40 Fig. 2 is a detail partly sectional view at a groove, a resilient metal ring, the external dilarger scale. ameter of said ring being greater than the in- The metal casing l of aluminium or duralumin, ternal diameter of said casing and fitting 1e contains as usual the charge of powder 2, the siliently in said annular groove, and a closing 5 wad 3, the shot 8. This shot is held down by disc of a material adapted to be disintegrated at M the disk 5 which is preferably of agglomerated the firing, said closing disc being retained by cork so that it may be easily disintegrated when said metal ring and retaining a shot and powder the shot is fired. The disk is retained by a ring charge within said casing. 6 of yielding metal, such as brass, which projects 4. A cartridge according to claim 1, wherein an inwi cily just enough to retain the disES. The inwardly turned flange is provided at the outer w disk 5 engages a groove 1 provided in the wall 01' end of said casing.

the casing and which has preferably a sloping 1 ms SPENGIER. surface 1

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