US2191484A - Device for varying the amount of recoil in firearms - Google Patents

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Feb. 27, 1 940.. s H S 2,191,484

DEVICE FOR VARYING THE AMOUNT OF RECOIL IN FIREARMS Filed March 22, 1937 Patented Feb. a, tan

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DEVICE FOR-VYING THE AMOUNQ F RECOHL EN FIREARMS Robcrtfi. S. Hughes, Baltimore, Md, assighor of one-half to Milton Roberts, Baltimore, Md.

Application March 22, 1937, Serial No. 132,397

4 Claims. (oi. 89-44) This invention relates to a device for controlling the recoil of guns adapted to fire projectiles so that a high percentage of recoil may be eliminated and the percentage of recoil elimination may be lessened as desired to the'point of practically no recoil elimination. It may be desirable to have a relatively high recoil elimination for some types of guns, whereas with other types the recoil elimination should be small, and the device Lo of my invention provides for controlling the percentage of recoil elimination as well as means for regulating the amount of blast resulting from the discharge of the gun. A

In the accompanying draw ng: l5 Fig-1-is a longitudinal central section through my device showing it attached to the muzzle end of a gun barrel, a portion of the barrel being also shown in central longitudinal section;

Fig. 2 is a transverse section through the device, 20 taken on the line 2--2 of Fig. 1 and Fig. 3 is a transverse section on the line 33 of Fig. 1.

In the drawing 5 indicates the muzzle end of a gun barrel, 2 indicates'the bore of the barrel and 25 A indicates the recoil controlling device as a whole. The body 6 of the device is formed with a cylindrical gas chamber? and with a collar 5 at one end which forms an inlet to the chamber and a means for attaching the device to the gun 30 barrel. The barrel is externally threaded as shown at 3, and the collanhas internal threads 3 which engage the threads on the barrel. A seal port it extends from the forward end of the gas chamber through a cylindrical part 9 at the for- 35 ward end of the body, the seal port being in axial alinement with the collar and also with the bore of the" barrel when the device is mounted on the barrel. An annular shoulder 6 extends from the inner end of-the seal port to the side wall of the 4 chamber, and a plurality of discharge ports 8, in

an arcuate series, extend rearwardly'and outwardly from the forward part of the chamber adjacent said shoulder. A plurality of bafiie ports 1 l, in a similar series, extend through the side 5 wall of the chamber, at the rear of the discharge 1 ports, in a plane substantially perpendicular to the am's of the inlet opening and seal port, whereby thegases passing from the baflle ports will intercept the gases passing from the discharge 50 ports. It is to be noted that in the drawing the discharge ports are arranged around the .top and sides of the body and that there are no ports in its lower part, and that the baflle ports are 'similarly arranged. When the device is vmounted 55 upon a gun barrel it is held in this position by a and no blast.

set screw 25 which extends through the collar 5. The omission of ports on the lower side of the device is to lessen thedownward blast, which is desirable when the gunner is shooting prone.

A sleeve l2 for controlling the ports is slidably 5 mounted on the body. As shown, this sleeve has an internal annular flange l3 which is slidable on the collar and the forward part of the sleeve is I slidable upon the part of the body in advance of thecollar. This forward part of the sleeve has M an outwardly extending flange, M and the forward face of the sleeve and flange slopes forwardly and outwardly from thebody as'shown at E5. The sleeve is adjustable forwardly and backwardly on the body by means of an adjusting rod I8 having a threaded portion ll which extends through a threaded opening in 2. lug l6 depending from the sleeve and having its end portion I 9 journalled in an opening in a lug depending irom the body 6. A collar 2i, secured to the part i9 bya pin 22, 20 prevents endwise movement of the adjusting rod,

'A knob 23, secured'to the rear end of the rod by a pin 24, is provided forturning the rod to adjust the sleeve. v

Recoil elimination results from the discharge of the products of combustion through the discharge ports 8, and the'resulting reaction against the shoulder 6 If the sleeve is adjusted to its rearmost position, leaving the bafile ports and discharge ports open and unobstructed, the result, when the gun is fired, will be a maximum of recoil elimination and a substantial reduction in blast against the-gunner. If the sleeve is moved forward to the position shown in the drawing, where the discharge from the bafile portsv will be directed forwardly by the inclined lip on the sleeve? this will lessen the recoil elimination to a certain extent and also lessen theblast against the gunner. If the-sleeve is moved to-the.position where the bafile ports are entirely closed and the discharge ports are left entirely open, recoil elimination will be further reduced and also blast against the gunner. If the sleeve is adjusted to its foremost position, closing the discharge ports, the bailie ports being closed, 2.5

there will be practically no recoil elimination barrel and a sealport at its .forward end in axial alinement with said inlet opening and a shoulder extending laterally from the inner end of the seal port to the side wall of the chamber, said device having a plurality of discharge ports extending rearwardly and outwardly from the forward part of the chamber, adjacent the shoulder therein, and having a series of baflie ports extending through its side wall in a plane substantially perpendicular to the axes of the inlet opening and seal port whereby the gases passing from the bafile ports intercept the gases passing from said discharge ports.

2. A recoil controlling device for guns adapted to fire projectiles, comprising a'body adapted for application to the muzzle end of a gun barrel,

' said body having a cylindrical gas chamber theretially perpendicular to the axes of the inlet opening and seal port whereby the gases passing from the bafile ports intercept the gases passing from said discharge ports, and a member adjustable on the body to close and open the baflle ports.

3. A recoil controlling device forrguns adapted Y to fire projectiles, comprising a body adapted for application to the muzzle end of a gun barrel, said body having a cylindrical gas chamber therein and having a cylindrical inlet opening at its rear end adapted to receive the muzzle end of a gun barrel and a seal port at its forward end in axial alinement with said inlet opening and a shoulder extending laterally from the inner end of the seal port to the side wall of the chamber, said-device having a plurality of discharge ports extending rearwardly and outwardly from the forward part of the chamber, adjacent the shoulder therein, and having a series of baflle ports extending through its side wall in a plane substantially perpendicular to the axes of the inlet opening and seal port whereby the gases passing from the baiiie ports intercept the gases passing from said discharge ports, and a sleeve adjustable longitudinally of the body to close andrear end adapted to receive the muzzle end of a gun barrel and a seal port at its forward end in axial alinement with said inlet opening and a shoulder extending laterally from the inner end of the seal port to the side wall of the chamber, said device having a plurality of discharge ports extending rearwardly and outwardly from the forward part of the chamber, adjacent the shoulder therein, and having a series of balfie ports extending through its side wall in a plane substantially perpendicular to the axes of the inlet opening and seal port whereby the gases passing from the baflle ports intercept the gases passing from said discharge ports, and a sleeve adjusta- -b1e longitudinally of the body to close and open the bafile ports and discharge ports, said sleeve having its forwardend flaring forwardly and outwardly from the body.

ROBERT H. S. HUGHES.

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