Патент USA US2134476код для вставки
Oct. 25, 1938. J. HASEK BREECH PACKING FOR FIREARMS Filed March 6, 1936 Th}? _ FF (1. 3. i7 2 9 2,134,476 ' Patented Oct. 25, 1938 2,134,476 2,134,476 BREECH PACKING ‘FOR FIREARMS ‘ Jaroslav Hasek, Prague, '- Czechoslovakia Application March 6, 1936, 'Serial In Czechoslovakia March ‘8,1935 3 Claims. This invention relates to breech packings for ?re-arms, and constitutes a further development of and improvement on the breech packing forming the subject matter of Patent No. i) 2,117,885 (co-pending application Serial No. 52,819). In the said prior patent the packing is in the form of a disc of deformable material which is mounted on the breech block and so shaped that the pressure of the gases generated on the ?ring of the charge brings about an en largement of the diameter of this disc which is thereby caused to bear with its periphery against the wall of the barrel. At the same time this packing disc is suitably associated with the ex 15 plosive charge and is placed simultaneously with the latter in the position for ?ring. With the improvement according to the present invention the packing element, which is in the form of a disc made from deformable mtaerial, is provided with means which are so designed and arranged that the operations in loading and in extracting the case after ?ring do not differ in any respect from those required when using standard ammunition with normal cartridge 25 cases. The construction according to the in vention is such that no alterations or adapta tions need be eifected to the ?re-arm itself, so that it is perfectly possible in one and the same ?re-arm to use both the old and the new type 30 of ammunition. In accordance with the invention this result is achieved by providing beneath the packing disc proper a rigid and non-deformable disc (preferably of iron). Consequently the barrel of the ?re-arm can be left unaltered in the im mediate vicinity of the breech, and the means for extracting the empty cartridge-case acts in precisely the same manner with this new am munition as with ordinary ammunition, while at the same time any desired type of breech mecha nism can be employed which is designedlfor use with normal cartridge-cases. Since the packing disc is corrugated or cam~ bered and only becomes effective as a packing means after it has become deformed to a cer tain extent, the connection of this disc with the non-deformable backing disc must be such that the deformation of the former is not impeded on the ?ring of the charge. Further details and features of the improved breech packing according to the present inven tion will become apparent in the course of the ensuing description taken in conjunction with 55 the accompanying drawing in which a form of (Cl. 89-26) construction embodying the invention is shown, by way of example, in Figs. 1 to 3. In the drawing: Fig. 1 is a fragmentary longitudinal cross section through a breech packing constructed in accordance with the invention, showing a special con?guration of the packing seating surface on the barrel of the ?re-arm. Fig. 2 is a similar view, showing a modi?ed form of the packing adapted for use in con 10 junction with any ?re-arm in which ordinary cartridges maybe used; and Fig. 3 is a similar view showing a further modi?ed form of the packing disc. In the form shown in Fig. 1 the barrel of the 15 ?re-arm is provided with a ?ared packing seat ing surface which differs from that required when ordinary cartridge-cases areused. In this ?gure 2 denotes the deformable packing disc, while 9 denotes the rigid-non-deformable back 20 ing disc which is connected to the former by means of the screw joint IEI. In the screw threaded boss there can be provided the deton ating cap 3, and the entire assembly is mounted in the end of the barrel l of the ?re-arm. l I de 25 notes the means for extracting the empty case after ?ring. In the form of construction shown in Fig. 2 it is necessary to strengthen the portion of the rigid disc 9 extending into the bore of the barrel I 30 so that the deformable packing disc 2 bears at a point which is not weakened by the extracting means II. In the form of construction shown in Fig. 3 the packing disc 2 is arched or cambered in a 35 manner different from that adopted in the pre vious examples, and constitutes a continuous spherical arch. As means of connection be tween this packing disc 2 and the non-deform able disc 9 these is again employed screw thread 40 ing I‘! on the inner periphery of the ?xed por tion of the packing disc so that the threaded joint does not impede the required deformation of the packing disc on the spreading of this latter. In order to ensure that the packing disc 45 becomes extracted simultaneously with the rigid disc 9 the deformation of the packing disc is caused to bring about interlocking engagement between the two discs, for instance as shown at l3 in Fig. 3. The backing disc can also be 50 provided with an aperture I6 for engagement by a boss IS on the spreading disc, in which the detonating cap or igniting charge ?nds accom modation. I claim: 55 2,134,476 2 1. A breech packing for ?re-arms, comprising a packing disc composed of non-resilient deform able material, said disc- being forwardly arched and having a rearwardly extending interiorly threaded ?ange, a rigid non-deformable backing mally disengaged interlocking elements on said disc and backing, said elements being adapted to engage with each other when the deformable disc straightens out upon ?ring, one of said interlocking elements being an outwardly pro behind said disc and provided with a threaded portion engaging said ?ange threads, and nor mally disengaged interlocking elements on said a packing disc composed of non-resilient deform disc and backing, said elements being adapted to engage with each other when the deformable disc straightens out upon '?ring. 2. A breech packing for ?re-arms, comprising - a packing disc composed of non-resilient deform able material, said disc being forwardly arched 15 and having a rearwardly extending interiorly threaded ?ange, a rigid non-deformable backing behind said disc and provided with a threaded portion engaging said ?ange threads, and nor " ‘minimum jecting rim on said ?ange. 3. A breech packing for ?re-arms, comprising able material, said disc being forwardly arched. and having a rearwardly extending interiorly 10 threaded ?ange, a rigid non-deformable backing behind said disc and provided with a threaded portion engaging said ?ange threads, said back ing having a “medial aperture and said disc having a boss rearwardly extending into said 15 aperture, said boss being adapted to accom modate at least a detonating cap. JAROSLAV HAsEK.