Cushioned stock for firearms.

Application filed November 27,1905. Serial No. 289,284.

No.837,601.

To all whom it may concern: <

, Be it known that I, Burkard Behr, a sub- < ject of the German Emperor, and a resident 1 of Hamburg, in the German Empire, have in.5. vented certain new and useful Improvements in Cushioned Stocks for Firearms, of which the following is a specification.

The present invention relates to improve0 ments in small-arms, and more particularly refers to a recoil-brake in such arms..

Small-arms are already known in which the butt of the gun is arranged upon the end of the stock in such a manner as to be longitudinally displaceable, springs being interposed between the two parts for absorbing ΊΈ pj recoil

In accordance with the present invention the springs are replaced by an air-brake, by which means a far more reliable and uniform and especially a readily-adjustable braking action is obtained. Preferably the air-brake is combined with a liquid-brake, with which construction the dimensions of the pressurefaces may be kept within very small limits. A recoil-brake of this construction is illustrated in the accompanying drawings, in which— .·

Figure 1 represents a longitudinal section through the butt of a rifle, and Fig. 2 is a sec30 tion on the line AB.

The butt b is passed upon the end ot the stock a in such a manner as to be displaceable in the longitudinal direction. A metal cylinder c is inserted in the end of the stock, 23 where it is held by the screw i. The cylinder c is of smaller diameter at its front portion c than at its rear part c². In this cylinder there engages a piston d, fixed in the butt 0, the diameter of this piston substantially cor40 responding with the bore of the cylindrical portion d, while it is provided with a flangelike projection e, forming a piston for the part c². The part e is provided with fine passages d. The rear end of the cylindrical part 45 c² is obturated by the bottom piece/, screwed therein. A spring g is also provided m the stock a, and in rear of this spring a sliding plunger or bolt h is fixed in the butt 0. 1 he cylindrical part c² is filled with a liquid, such 50 as oil, glycerin, or the like.

When the weapon is fired, the recoil produces the backward movement of the stock a which moves in the butt δ, which is firmly held, so that the cylindrical part d is forced 55 against the stationary plunger d, and the air contained in d, affording an elastic cushion ’5 or resistance, is compressed, while the liquid contained in c² is forced through the openings d of the collar or flange e and into the space between e and f, the air and liquid brakes 60 thereby completely absorbing the recoil. The spring g is at the same time compressed, and toward the completion of the recoil it again presses the stock forward into the position represented in the drawings. The rear end of the piston d and of the plunger Λ are fixed in the butt b by means of screws d h in such a manner that the position of the piston d in the brake-cylinder c and the tension of the spring g may be regulated in accordance with requirements by turning these screws. . . ,