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Publication numberUS2442899 A
Publication typeGrant
Publication dateJun 8, 1948
Filing dateApr 8, 1946
Priority dateApr 8, 1946
Publication numberUS 2442899 A, US 2442899A, US-A-2442899, US2442899 A, US2442899A
InventorsMcallister William H
Original AssigneeMcallister William H
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Choke attachment for gun barrels
US 2442899 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

June 8, 1948. w. H. McALLlSTER 2,442,899

CHOKE ATTACHMENT FOR GUN BARRELS Filed April 8, 1946 Inventor B, QM aoiw.

anyway 3M8 atente June STATES PATENT OFF-ICE 1 Claim. (CI. 42-79) This invention relates to new and useful improvements and structural refinements in choke attachments for gun barrels, and the principal object of the invention is to provide a device of the character herein described, whereby the degree of taper at the muzzle of the gun barrel may be effectively adjusted to control the limits of dispersion of the discharge shot.

A further object of the invention is to provide an attachment which may be readily applied to or removed from the gun barrel.

An additional object of the invention is to provide an attachment which may be conveniently controlled from the firing position of the gun in the arms of the user.

Another object of the invention is to provide an attachment which is simple in construction and which cannot easily become damaged.

A still further object of the invention is to provide an attachment which will substantially reduce the recoil normally associated with the firing of the gun.

With the above more important objects in view, and such other objects as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of arts as illustrated in the accompanying drawings, in which Figure 1 is a fragmentary side elevation of the gun barrel, illustrating the invention in situ.


Figure 2 is a top plan view of the subject shown in Figure 1.

Figure 3 is a fragmentary perspective view of the invention.

Figure 4 is a longitudinal cross sectional view of the same.

Figure 5 is a side elevation of a modified embodiment of the invention, and

Figure 6 is a cross sectional view, taken in the plane of the line 6-6 in Figure 5.

Like characters of reference are used to designate like parts in the specification and throughout the several views.

Referring to the accompanying drawings in detail, the invention embodies in its construction a conventional gun barrel II], the muzzle of which is formed with a plurality of spaced, longitudinally extending slots H. The latter are open at the outer end of the muzzle and terminate in enlarged apertures I! at the inner ends thereof, as is best shown in the accompanying Figure 3.

The essence of the invention resides in the provision of an open-ended sleeve I3, provided with a tapered bore It, and slidably positioned on the muzzle of the barrel H) with the minor diameter W of the sleeve adjacent to the muzzle opening. It will be noted that the entire length of the bore It need not be tapered, and that the same may be tapered only along a portion of its length, as is best shown in the accompanying Figure 4.

A suitable bracket I6 is provided medially the length of the underside of the barrel [0, and a control rod l1, secured at one end thereof to the sleeve l3, slidably passes through the bracket l6, as is best shown in Figure 1.

The remaining end portion of the rod I! may, if desired, be angulated as at I8 in conformity with the contour of the barrel, and the extremity of the rod ll carries a convenient finger piece I9.

When the invention is placed in use, the sleeve I3 is, of course, applied to the muzzle of the barrel it in the manner already set forth. By manipulating the finger piece I 9, the sleeve l3 will be slid longitudinally on the muzzle, whereby the tapered portion M of the bore in the sleeve 13 will engage the slotted portion of the muzzle allowing the same to expand when moved in one direction and forcing the contraction of the slotted portion when moved in the opposite direction.

In this manner, the angle of taper at the end. of the muzzle will be efiectively controlled, thereby correspondingly governing the dispersion of the shot.

By virtue of the location of the finger piece is, the invention may be conveniently operated from the firing position of the gun in the arms of the user. If desired, a transversely extending pin 20 may be provided in the rod l1, between the bracket l6 and the finger piece l9, said pin coacting .with the bracket Hi to limit the sliding movement of the sleeve l3. The pin 20 will thus prevent the sleeve from being pushed excessively in the forward direction and becoming disengaged from the muzzle of the barrel l0.

Referring to the modified embodiment of the invention illustrated in the accompanying Figures 5 and 6, the same is similar to the embodiment already described, but includes a plurality of pressure relieving apertures 2|, provided in the barrel 22 adjacent the choke attachment 23. The apertures 2| will facilitate the escape of a certain volume of the exploded gases, thereby reducing the recoil associated with the firing of the gun.

It is believed that the advantages and use of the invention will be clearly apparent from the foregoing disclosure and accordingly further description thereof at this point is considered unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination, and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What I claim as my invention is:

In association with a gun barrel having the muzzle thereof provided with a plurality of spaced, longitudinally extending slots, a choke attachment comprising in combination, an openended sleeve provided with a tapered bore, said sleeve being slidably positioned on said muzzle, and means for sliding said sleeve, and a plurality of apertures in a portion of said barrel adjacent its muzzle, whereby movement of said choke attachment to increase the choking action thereof a REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 559,550 Tittmann May 5, 1896 653,813 Broyles Jul 10, 1900 685,689 Broyles Oct. 29, 1901 812,140 Kent Feb. 6, 1906 1,348,750 Schuster Aug. 3, 1920 1,508,805 Legett et a1 Sept. 16, 1924 1,598,360 Pavel: Aug. 31, 1926 1,892,522 White Dec. 27, 1932

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US559550 *Jun 22, 1895May 5, 1896 Franz tittmann
US653613 *Apr 17, 1900Jul 10, 1900James C BroylesChoke attachment for gun-barrels.
US685669 *Jan 4, 1901Oct 29, 1901James C BroylesChoke attachment for gun-barrels.
US812140 *Jun 14, 1901Feb 6, 1906Perry E KentGun-barrel for pistols, rifles, and ordnance.
US1348750 *Dec 19, 1918Aug 3, 1920Xavier Schuster FrancisChoke attachment for shotguns
US1508605 *Feb 1, 1923Sep 16, 1924Albert LegettGun construction
US1598360 *Mar 22, 1924Aug 31, 1926Pavek William JVariable and low muzzle-pressure gun
US1892522 *Mar 24, 1931Dec 27, 1932White Ezekiel FAdjustable gun choke and method of constructing the same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2490829 *Jul 20, 1948Dec 13, 1949Noll Robert MCombined choke regulator and recoil compensator for shotguns
US2512850 *Sep 5, 1947Jun 27, 1950Blake Crandall GladstonePattern control means for shotguns
US2712193 *May 3, 1951Jul 5, 1955Mathis William FShot gun muzzle device
US2805602 *Mar 18, 1954Sep 10, 1957Moore Chester FBlank cartridge adapter for rifles
US2807903 *Nov 9, 1953Oct 1, 1957Wheeler Warren RAdjustable choke
US2894348 *Mar 2, 1955Jul 14, 1959Cutts Richard MAdjustable muzzle choke
US3714727 *Aug 25, 1970Feb 6, 1973Skb Arms CoA gun barrel
US4151671 *May 24, 1978May 1, 1979Mcpeak Walter GMechanism for remotely operating variable choke devices for shotguns
US5509345 *Aug 12, 1994Apr 23, 1996Cyktich; James M.Muzzle attachment for improving firearm accuracy
US5698810 *Nov 29, 1995Dec 16, 1997Browning Arms CompanyConvertible ballistic optimizing system
US5798473 *Apr 30, 1997Aug 25, 1998Roblyer; StevenHarmonic optimization system for rifles
US6112447 *Sep 11, 1998Sep 5, 2000B.B.A. Research & Development, IncShotgun choke
US6223458Apr 1, 1999May 1, 2001Kevin SchwinkendorfHarmonic optimization technology
US7895787Mar 1, 2011Andry Mark LPorting feature for firearm
US20080173166 *Jan 23, 2007Jul 24, 2008Andry Mark LShotgun choke
USRE35381 *Oct 19, 1995Nov 26, 1996BrowningBallistic optimizing system for rifles
DE1172577B *Jan 8, 1962Jun 18, 1964Theodor BrandtVerfahren fuer den Schrot-Weitschuss
U.S. Classification42/79, 89/14.3
International ClassificationF41A21/40, F41A21/00
Cooperative ClassificationF41A21/40
European ClassificationF41A21/40