US2206568A

US2206568A - Recoil control device

Info

Publication number: US2206568A
Application number: US204176A
Authority: US
Inventors: Robert H S Hughes
Original assignee: MILTON ROBERTS
Current assignee: MILTON ROBERTS
Priority date: 1938-04-25
Filing date: 1938-04-25
Publication date: 1940-07-02
Anticipated expiration: 1957-07-02

Description

July 2, 1940. R. H. s. HUGHES RECOIL CONTROL DEVICE Filed April 25, 1958 2 Sheets-Sheet 1 July 2, 1940. R. H. s. HUGHES 2,206,568

RECQIL CONTROL DEVICE Filed April 25, 1938 2 Sheets-Sheet 2 UNH'EQ- STATES mm caries RECOIL CONTROL DEVICE Robert H. S. Hughes, Baltimore, Md., assignor of one-half to Milton Roberts, Baltimore, Md.

Application Apr-i125, 1938, Serial No. 204,176

3 Glaims.

This invention relates to recoil controlling devices for guns. In carrying out the invention a casing is provided adapted for attachment to the muzzle end of a gun barrel, and this casing embodies two similar recoil structures arranged in tandem, through'which a bullet fired from a rifle must pass. Each recoil structure includes a combustion chamber formed within the casing,

, an annular shoulder at the forward end of the chamber, discharge ports extending rearwardly and outwardly from the forward part of the chamber adjacent said shoulder and baille ports extending through the casing at the rear of the discharge ports. A sleeve extends from the end of the barrel into the rear chamber, a second sleeve extends from the shoulder at the forward end of the rear chamber into the forward chamber, and a seal port is provided at the forward end of the forward chamber, this seal port being in line with said sleeves. The invention embodies other features hereinafter described in detail.

In the accompanying drawings which illustrate the invention:

Figure 1 is a central longitudinal section through a recoil device, showing the same fixed to the muzzle end of a gun barrel, the latter being also shown in longitudinal central section;

Figure 2 is a transverse section through th device taken on the line 2-2 of Figure 1;

Figure 3 is a similar view on the line 33 of Figure 1;

Figure 4 is a section the same as that shown in Figure 2, but showing a modification in which the discharge ports are in the form of arcuate slots instead of being cylindrical in form as illustrated in Figures 1 and 2;

Figure 5 is a sectional view the same as in Figure l, but showing a device in which the rear combustion chamber is larger than the front combustion chamber;

Figure 6 is a section on the line 6-43 of Figure o; v

Figure 7 is a sectional view like that shown in Figure 5, but showing a device in which the rear combustion chamber is smaller than the front combustion chamber.

Referring to Figures 1 to 3, inclusive of the drawings, A represents a recoil deviceas a whole, comprising a metal casing I, in which are formed two cylindrical combustion chambers, 2 and 3, arranged in tandem. An adapter 5 is threaded into the rear end of the casing, as shown at 4, and this adapter in turn is threaded on to the muzzle end 6 of the gun barrel l which has the usual lands 8 and'grooves 9. The adapter has an annular flange I0 against which the rear end of the casing rests and it has an annular shoulder it] which fits against the end of the gun barrel when the device is mounted thereon. It also has a sleeve Il,'concentric with the bore of the barrel extending forwardly into the chamber 2, the internal diameter of this sleeve being approximately that of thebore l2 of the gun.

The casing has an internal annular flange 23, about midway of its length, into which is fitted a sleeve 22 which projects into the forward chamber 3, this sleeve having approximately the same internal diameter as that of the sleeve II and the two sleeves being in axial alinement. The flange 23 and the rear end of the sleeve 22 form an annular chamber s at the forward end of the chamber 2 which extends from the bore of the sleeve to the side wall of the chamber. A plurality of discharge ports I 5 extend rearwardly and outwardly from the forward part of the chamber, adjacent said shoulder, through the side wall of the chamber and an external shoulder IS. The discharge ports, as shown in Figure 2, are arranged in a circular series in groups of three: At the rear of the discharge ports and the shoulder iii are baille ports i3, in the form of arcuate slots cut through the side wall of the casing, each slot being of such length that the gases discharged through it will intercept the gases discharged from a group of the rearwardly directed discharge ports. As shown in Figure l, the opposite side walls of each slot are inclined forwardly and outwardly so that the products of combustion discharged from the baiile ports will have an outward and forward direction.

A plug i .1 is fitted into the forward end portion 19 of the casing, and this plug has a seal port 2| in axial alinement with the sleeves H and 22. As shown at l8, the plug is screw threaded into the casing and a flange 20 on the plug fits against the forward end of the casing and forms a stop for the plug. The inner end s of the plug forms an annular shoulder at the forward end of the chamber 3 extending from the seal port to the side wall of the chamber, and discharge ports 25 extend rearwardly and outwardly from the forward part of the chamber, adjacent said shoulder, through the side wall and through an external shoulder 26. These discharge ports are in all respects the same as the discharge ports l5, and baiile ports 24, in all respects the same as the baflle ports [3, extend through the side wall of the chamber 22 at the rear of the discharge ports. The forward or disthrough the rear chamber 2 and through thebore of the sleeve 22, which serves as a seal port for said. chamber, and thence through the forward chamber 3 and its seal port 2|. Following the issuance of the bullet from the sleeve II the gases and still burning products of combustion from the gun barrel create an extremely high pressure in the rear chamber, particularly at the moment when the sleeve 22 is substantially closed by the bullet, with the result that the discharge'of gases through the discharge ports l5 against the atmosphere causes a reaction against the shoulder s at the forward end of the chamber 2, which largely counteracts recoil. At the same time gases are discharged outwardly and forwardly from the chamber 2 into the path of the gases issuing from the discharge ports, and. the gases from the baille ports cause a deflection of the gases from the discharge ports and pre vent blast against the operator of the gun. The same action takes place in the, forward part of the device. As the bullet leaves the sleeve 22 and enters the seal port 2|, the gases and still burning. products of combustion following the bullet into the chamber 3 create high pressure therein and a discharge of gases through the discharge ports 25, withconsequent reaction against the shoulder s at the forward end of the chamber 3, further reducing the recoil, and the gases discharged through the baflie ports 24 intercepting the gases from the discharge ports, reduce the blast against the operator of the gun.

By providing the annular pockets t and t at the rear of the baflle ports it is found that the gases escape more readily through the baffle ports than if these pockets were not present. When the gun is fired high pressure results in all parts of the chambers and also there is an inconceivably rapid action and reaction of the gas pressure between the forward and rear end of the chamber and it is believed that a cushioning efiect takes place in these pockets which helps to eject the gases through the baffle ports. This is desirable in order the baffle discharge may intercept the gases issuing from the discharge'ports which have a greater distance to travel in going to the front end of the chamber and then rearwardly through the discharge ports.

Figure 4 is a sectional view the same as in Figure 2, showing a modification in which discharge ports 30 in the form of arcuate slots are substituted for the groups of cylindrical ports shown in Figure 2, the parts being otherwise the same and similarly numbered.

In Figure 5 the structure A is substantially the same as in Figure 1 except that the two chambers are not of the same size, the chamber 2' being larger than the chamber 3, and the seal port 32 for the smaller chamber is formed in a part 3| of the casing instead of in a plug, as in Figure 1. The corresponding parts are similarly numbered in both figures. Figure 6 is a section on the line 6-3 of Figure 5.

In Figure 7 is shown a modification in which the rear chamber 2' is smaller than the forward chamber 3. In this figure the adapter is omitted and the body of the casing, as shown at 33, is threaded on to the gun barrel, and the sleeve 34 has a flange 35 which is threaded into the casing and rests against the end of the gun barrel. The body is made in two parts, I and l the latter being threaded on to the former as shown at 36 and the parts having tapering faces 38 and 39 which make a tight joint. The 'sleeve 31 which forms a seal port for the chamber 2 is shown integral with the part I. Otherwise, the parts are the same as in Figure 5 and similarly numbered.

The operation of the devices shown in Figures 5 to 7 is the same as in Figure 1, except that with an enlarged rear chamber and a small front chamber the pressure will naturally be lower in the former and higher in the latter, whereas with a small rear chamber and an enlarged front chamber the pressure will be very high in the rear chamber and reduced in the forward chamber. The invention is not limited to particular dimensions of chambers and it may be desirable to make them of various relative sizes.

What I claim is:

l. A recoil control device for fire arms comprising a metal casing having front and rear cypart of each chamber adjacent the shoulder thereof, said casing having baffle ports in its side wall extending fromeach chamber at the rear of the discharge ports, a sleeve attached to the rear end of said casing adapted to engage the end of a gun barrel and projecting forwardly therefrom into said rear chamber, a second sleeve in said casing at the central portion thereof and extending from the shoulder of the rear chamber into the forward chamber, said second sleeve serving as a seal port for the rear chamber, and said casing having a seal port at its forward end communicating with the forward chamber, said sleeves and the seal port at the forward end of the casing being in line with one another.

2. A recoil control device for fire arms comprising a metal casing having front and rear cylindrical combustion chambers, said casing having an annular shoulder at the forward end of each chamber and having discharge ports extending rearwardly and outwardly from the forward part of each chamber adjacent the shoulder thereof, said casing having bafiie ports in its side wall extending from each chamber at the rear of the discharge ports, an adapter secured within the rear part of the casing and having a sleeve adapted to engage the end of a gun barrel and project forwardly therefrom into said rear chamber, a second sleeve in said casing at the central portion thereof and extending from the shoulder of the rear chamber into the forward chamber, said second sleeve serving as a seal port for the rear chamber, and said casing having a seal port at its forward end communicating with the forward chamber, said sleeves and the seal port at the forward end of the. casing being in line with one another.

3. A recoil device for the muzzle end of a firearm barrel comprising a metal casing having a cylindrical combustion chamber, said casing having an annular shoulder at the forward end of said chamber and having discharge ports extending rearwardly and outwardly from the forhaving a bore in alinement with the bore of the barrel, said sleeve, the shoulder member and the side wall of the chamber forming an annular pocket at the rear of the baflle ports, the bore of said sleeve constituting the inlet port to the [Q chamber.

ROBERT H. S. HUGHES.