US898802A - Means for securing percussion-cap in cartridges. - Google Patents

Description

.R. H. STRIBEGK. MEANS FOR SECURING PERCUSSION GAPS IN CARTRIDGES.

. UATION FILED MAY 25,1907- Patented Sept. 15, T1908 iUr - demonstrated UNITE STATES Agnn mes v RICHARD HERMANN STRIBECK, OF GRUNEWALD, NEAR BERLIN, GERMANY.

MEANS FOR SECURING PERCUSSION-CAPS IN CARTRIDGES.

Specification of Letters Patent.

Patented Sept. 15, 1908.

Application fiIed May 25, 190.7. Serial No: 375,642.

T all whom it may concern:

Be it known that I, STRIBECK, engineer, citizen of P siding at Grunewald, near Berlin, have invented new and russia, re- Germany, useful Improved cans for Securing Percussion-Caps in *Care tridges, of which the following is a specification.

The invention has reference to an improved-means of fixing and rounds the detonator and also surrounds the ignition space, together with the bottom and the anvil, is formed of one piece of metal.

In accordance with the usual means the the friction between its cylindrical outer face and the iiiterior bore of the cartridge case provided for the reception of the percussion cap. This friction is invariably produced by soforming the percussion cap that its diameter 18 somewhat larger than the said bore of the cap cl'iainberand is pressed into the latter. The joint between the percussion cap and the cap chamber is intended to be produced by the pressure with which said detonator bears against the bore. Experience has however that with this construction t e percussion cap does not always remain tight, owing to two principal reasons. One of these consists in the expansion of the cap chamber. This occurs almost rulewith light metals and light alloys (the to this expansion tl position of the specific weight of which is less than 4 owing to their small degree oi hardness. ()win ic percussion cap be comes loose, flowibetweenthe same and the cap chamber and cause erosion. other cause of lack of tightness is the sunk percussion cap in the capchamber. On firing the percussion cap is displaced in the bore of the cap chamber by the gas pressure, until it bears against the face of the breech bolt or block of the gun. Owing to this movement and the simultaneous deformation of the bottom of the percussion cap bythe gas pressure on the one hand and the firing pin on the other, the joint is destroyed.

The object of the present invention is to means for 'preventihg the penetrachamber with a projection against which the j' that this hearing may be maintained RICHARD HERMANN I spon ding view showing .portiOn Of the portion of during percussion cap must be prevented from displacement under the influence of the gas pressure. This object is attained owin to the fact that parts of the bottom of the percussion cap, or projections formednpon the same, rest against correprojections within the interior of the cap' chamber. The present invention, therefore, overcomes the defects referred to above which as explained give rise to loosen-. ing of the percussion cap and the escape of gases between the latter and the cap chamb r,

In order that the invention may be clearly understood reference may be had to the accompanying drawing in which- Figure 1 is asectional view of the cartridge head with the cap therein-Fig. 2 a like a modiiication i ig. 22 isa of the cartridge head shown the insertion of the ca )-Fig.

sectional view in Fig. 1 before 3 is a sectional view showing a part of the breech block which has a special new f()l'lll. lg 5, 6 and 7 are sectional views of further modifications. i

As already stated, the edge 1 of the detonator 2 bears against a corresponding projection-3 within. the cartridge 4. In Fig. 1 by impressing a circular channel 5 in the head of the cartridge, a portion of the cartridge case is compressed in front of the outward percussion cap 2] The construction shown in Fig. 2 differs from'that shovn in Fig. 1 owing to the fact that, the head or end face of the cartridge does not have a channel formed therein. The head 6 projecting in front of the outward the percussion cap is produced by forming the cartridge case with a raised edge surrounding the bore which receives the per cussion cap as shown in Fig. 2, and forming down this. edge after the insertion thereof. The construction shown in Fig. 2 is preferable, in carrying out the invention, to that in Fig. 1, as in this casethe bottom of the case is not weakened by the formation of a channel. he constructions illustrated in Figs. 3 and 4 are still more complete than that shown in Fig. 2, as in these in the first place the head of the cartridge case does not bear upon the face of the breech bolt or block 7 completely but only with an annular surface Fig. 3) surrounding the exposed surface of the percussion cap said annular surface view of a diil'erent-form of I cartridge li(. l(l.l l. 4 is a like specially against the face, of the breech belt or block By this means the percussion cap is pressed in the direction of the axis from both sides and thus the pressure on the joint of the detonator is still further increased. As the pressure of the joint insee Fig. 4.

creases in accordance with the pressure at hung a reliable JOIDiis obtained, eveir with high gas pressures.

The forgoing explanations will render Figs. 5 to 7 intelligible. These figures show different forms of: caps, for instance, Fig. 5 shows a cap having a ilange 5 engaging a recess in the cartridge head. Fig. 6 shows the llange in a. ditterent location and Fig. 7 shows a cap having a reduced portion against which the ease engages.

The invention is also applicable to percussion caps which are connected to the cap chamber by screwing or otherwise.

l l l l l l l l laving now particulartv described and ascertained the nature oi my said invention and in what manner the same is formed I declare that what I claim 1s:-

1 A cartridge having a cap chamber in its head, an. annular shoulder formed. in said chamber, a cap having its inner edge adapted to bear against said shoulder, and a projection on the cartridge head ada )ted to bear on a. partof' the cap head to hold the cap in the chamber.

2. A cartridge having av chamber in its head, an annular shoulder in. said chamber, a cap adapted to enter said chamber and to have itsinner edge rest against said shoulder, and an. annular raised portion on the cartridge surrounding said chamber, said portion bcing adapted to be forced over on the cap to hold the same in place.

.ln testimony whereof i have signed my name to this specilicatioi'i. in, the presence oi:

two subscribing witnesses.

ltltlllliltll liERMANN Slltilil'iUlt.

'\\'itnesses: I Wonnnuan iiAlJP'l, liicxmt l lasrnn.

to be per-

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