US1624649A - Sporting cartridge - Google Patents

Description

A ril 12- 1927.

p c. DESALLIMES SPORTING CARTRIDGE Fil-ed Oct. 27, 1925 Y y zg Patented Apr. 12, 1927.

d F HCE.

CARLOS DES ALLIMES, OF JEREZ DE LA FRONTERA, SPAIN.

SPORTING CARTRIDGE.

Application filed 0ctober'27, 1925. Serial No. 65,224.

My invention relates to improvements in sporting cartridges.

The object of this invention is to obviate the disadvantages of the paper cartridgecases at present in use.

The accompanying drawings illustrate the invention.

Fig. l is a vertical cross section of a hollow cartridge-case.

Fig. 2 is a metal disc or hermetically closing wad, and

Fig. 3 illustrates a vertical cross section of a iilled cartridge-case.

The improvement consists not only vinl a considerable increase in the resistance offered by the walls M of the lower part of the cartridge oase (the part subjected to the` greatest pressure at the moment of the ignition of the powder), but also prevents the powderwad from exercising any direct pressure on the powder', and also the said powder-wad from sliding downwards when the edges of the cartridge-case are folded in; it has been provided that the lower interior part of the cartridge-case shall be of less diameter than the rest of the interior of the case, and thus is obtained a powder-chamber P, very much strengthened, whose base may have the form of a semi-plane, an ovoid, or a truncated cone, and may be of a capacity suitable for the class of powder which is to be used, whether fine-grained, coarse-grained or laminated, Figs. 1 and 3 of the accompanying drawings showing two diiferenttypes of the said reduced powder-chamber.

Thus the cartridge-case, besides being` considerably strengthened in the part which is exposed to the greatest pressure, offers the advantage that in no case can the powderwad pass the ledge (e) Figs. l and 3, formed by the difference in diameter between the powder-chamber and the rest of the interior of the cartridge-case so that in no case can the charge of shot (i) become loose, as it is pressed between two wads which are absolutely fixed; one of them being the powderwad (f) with its corresponding card-board discs (g) and (it) whose position I describe in Fig. 3, and the other being the hermetically closing metal disc or wad (a) with its corresponding cork disc (c), which is likewise described in the same Fig. 3, and which constitutes the other improvement hereinafter described.

As is well known, the closing of sporting cartridges is at present effected by a cardboard disc which, when the edge of the cartridge-case is folded in, is held at the end of the case.

This vcardboard disc has the disadvantage that when it gets damp, as frequentlyhappens on rainy days, it tends to affect the shooting, for it communicates the dampness to the rest of the cartridge, so that the powder is contaminated, or, at all events, the percussion is affecte The improvement to which the presentinvention refers avoids all the disadvantages which I have mentioned, for by means of this new process there is obtained a hermetic closing, so that the efl'ect of the discharge is always perfect, for the rain cannot affect the the powder or the cartridge-case, as thelatter, after the edge has been folded in, forms one single metallic piece. l Near the upperv edge or mouth of the'cartridge-case, in its inner surface and at .a distance of one mm. (l/Q inch) from the, said extremity, there is a circular groove or channel Fig. l (r), whose form of an acute angle permits the entry of the circular beve-l (with the same angle) of an aluminium disc or wad Fig. 2 (c) destined to form an absolutely hermetic closing of the cartridge-case as soon as the latter has been subjected to a slight exterior pressure on its extremity or mouth by means of a Special closing-cone, which reduces by one mm. (l/Q inch) the diameter of the said mouth, producing the perfect fitting of the bevel of the disc (a) in the interior of the circular groove or channel (r) ofy the cartridge-case (Fig. 3), soL thatl an absolutely hermetic closing is obtained, which, however, does not oppose to the egress of the charge a resistance greater than that presented by the folding in of the edge of the best quality cardboard cartridgecases.

On the other hand, the closing wad (a) consisting of a sharp-edged aluminium disc, of the same diameter as the interior of the barrel, and as this metal is extremely ductile and malleable, it yields and hollows itself or curves, on passing through the choke of the barrels, just as easily as the cardboard wads.

Owing to this new process of closing', the cartridges may be exposed to the rain for an indefinite time without having the slightest damage caused by ,the moisture to the charge contained in them.

Another very important advantage offered by the metallic 'closing is that in the shotguns with a cartridge-chamber of 65 lnrn., Where it can loe used the same charge as in those with a cartridge-chamber of 7'() inni', because this cartridge-case With metallic closing of 65 inni., has the necessary capire? ity to take the same charge as the cardboard cartridge-cases of 2"0 min., so that all good shot-guns with a short cartridge-Chaniber can take the saine 'charges as are usually employed in the long' cartridge.

This new system of metallic closing also permits the use of a thicker 'powder-Wad, hoth in `the vcartridges o'i 70 inni., and in those of 65 inni., for the usual charges, which aiects the shooting` iery beneficially. Having thus described iny invention. What I claim is: l

l. A metal cartridge case having its mouth -edge formed with an undercut channel presenting an abrupt shoulder and a n'ietal disc seating in and conforiningvto said channel andlhearing' frein the shoulder. y

2. A metal cartridger case havin'g iiiouth formed With 'a' lgroove the loa-se of Which forms an abrupt shoulder and the side Wall of which orins an acute angle with said shoulder, and a disc adapted to seat in said `channel, the peripheral edge 'of the disc forming an acute angle with the face thereof to accurately ht the corresponding angle of the groove.

3. A cartridge comprising a case adapted to receive a. charge, a Wad overlying the charge, the peripheral edge of the case beyond the Wad being' formed on the inner surace with a channel terininating in an abrupt shoulder, a inetal disc fitting in said channel and bearingon the shoulder and on the Wad, the peripheral edge of the disc being at an acute angle to the bottoni surface of the disc, the Wall of the groove closely embracing the inclined peripheral edge elthe disc.V I

` L A. sporting cartridge .case of inetal having' a coinliaratively thin ni'etal Vdisc seated in a channel 'formed in the 'end of the `case and sealed with the case, the outer surface of the disc being flush lwith the extreme edge of the case whereby to 'permitan interior lengthof case for the charge of `greater capac-ity than the interior length oi' cartridges vsiinilar over all "dimensions of inturned closing ends'. p

In testimony whereof he atliXes his signature.

C. DES ALLIMES.

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