US178806A - Improvement in recoil-checks for gums - Google Patents

Description

A. G. SINCLAIR.

, RECOIL-CHECKS FOR GUNS. No; 3 5 Eatente d June 13, 1876,

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N- PETERS, PNOTIO'UTNOGRAFHER. WASHINGTON, DC-

ALLEN G. SINCLAIR, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN RECOlL-CHECKS FOR GUNS.

Specificationforming part of Letters Patent No. H7,06, dated June 13, 1876; application filed February 9, 1876.

To all whom it may concern Be it known that I, ALLEN G. SINCLAIR, of the city of Brooklyn, county of Kings and State of New York, have invented a new and Improved Recoil-Cheek for Guns, which improvement is fully set forth in the following specification, reference being had to the accompanying drawing, in which- Figure 1 represents a longitudinal vertical section of a gun-carriage with my improved recoil-cheek. Fig. 2 is a plan or top view of the same.

Similar letters indicate corresponding parts. This invention consists in the combination of a counter-recoil spring with the frictionrail secured midway between the chassis rails of" a gun-carriage, and with a box-clamp and friction-plate attached to the upper carriage,

, so that the friction-rail is permitted to yield to the counter recoil of the upper carriage, and the danger of buckling or breaking said friction-rail by the counter recoil is avoided.

In the drawing, the letters A A represent the chassis-rails of a gun-carriage. About midway between these chassis-rails is situated the friction rail 13, the front end of which passes loosely through a transom, G,taking the place of the hurters, while its rear end extends through a transom, D, and is subjected to the action of a spring, E, of steel, rubber,

or any other suitable material, the tension of which can be regulated by a nut, a. The front end of the friction-rail is provided with a head, I), which is drawn up firmly against the front tension 0 by the action of the spring E.

It will be seen from this description that the friction-rail is prevented from moving in the direction of its length toward the rear of the carriage; but it has a longitudinal movement toward the front as far as the spring E will permit.

Said friction-rail is made of a single wroughtiron bar, either rectangular in its cross-section, or of any other suitable form or shape, and it may be made parallel throughout its whole length, or it may be slightly tapering.

On the upper carriage F is secured a boxclamp, G, and a friction-plate, H, which is subjected to the action of a set-screw, o. By means of this set-screw the friction-plate H is so adjusted that the recoil of the upper carriage is taken up by the friction-rail B, allowing said carriage, however, to move to the rear end of the chassis-rails AA. When the recoil of the upper carriage ceases, the strain on the frictionrail is at an end 5 but the counter recoil of the carriage and the elasticity of the rail react. and if said rail is rigidly attached at both ends, a tendency to buckle or to break exists, and the effect of the friction-rail, as a recoil-cheek, is destroyed. This defect I .have obviated by the counter-recoil spring, which permits said friction-rail to move sufficiently in the distance of its length toward the front to permit the counter recoil to take place without producing any damage.

I do not claim, broadly, as my invention, the combination of a friction-rail with a guncarriage, such having been used heretofore.

What I claim as new, and desire to secure by Letters Patent, is

The guided sliding friction-rail B, having the spring E, in combination with the boxclamp G, and friction-plate H, said box-clamp being secured upon the carriage which moves on the chassis-rails, all constructed and arranged to operate substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 8th day of February, 187 6.

ALLEN G. SINCLAIR. Witnesses:

FRED. B. CHURCHILL, E. F. KASTENHU'BER.

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