US3252237A

US3252237A - Gun barrel seating device

Info

Publication number: US3252237A
Application number: US397877A
Authority: US
Inventors: Korzeniewski Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-09-21
Filing date: 1964-09-21
Publication date: 1966-05-24
Anticipated expiration: 1983-05-24

Description

y 1966 R. KORZENIEWSKI 3,252,237

GUN BARREL SEATING DEVICE Filed Sept. 21, 1964 INVENTOR.

ROBERT KORZENIEWSKI BY q 9 22mg ATTORNEYS pivotal movement thereof.

United States Patent 3,252,237 GUN BARREL SEATING DEVICE Robert Korzeniewski, 59800 North Ave., New Haven, Mich. Filed Sept. 21, 1964, Ser. No. 397,877 14 Claims. (CI. 42-75) The invention relates to fire arms and refers more specifically to a lock up ramp which term defines an abutment adapted to be adjustably secured to an automatic pistol or the like against which the rear end of the pistol barrel may be locked in a limiting upper position for accurately positioning the rear end of the barrel of the pistol.

Production fire arms have rather wide tolerances so that they may operate under adverse conditions without jamming or misfiring. These wide tolerances are, however, not acceptable for match shooting. The fire arms must be made more accurate for match shooting by procedures included in the general term accurizing.

The accurizing of automatic pistols has in the past included reducing tolerances in the barrel supporting mechanism as much as possible byadding material to the mating parts thereof. Such accurizin-g whileacceptable does not do a complete job with fire arms wherein the barrel is pivotally supported at the rear end. With such structure, the elevation of the rear end of the barrel may be slightly varied at battery position due to variation in This is particularly undesirable since shooting accuracy depends upon the exact return of the barrel to the same position after each firing of the pistol.

In addition, when the fire arm is accurized by adding material to members thereof to reduce loose movement between the members thereof, sludge which collects in fire arms on use may cause misalignment of the barrel since there are substantially reduced clearances in which sludge may rest with accurized fire arms. Also, with the prior method of adding material to close tolerances in accurizing fire arms no provision is made for wear of the fire arm in use so that the fire arms must be accurized periodically if they are to be maintained in top condition.

Another fault of prior fire arms having barrels in which the rear end does not return to an exact position with respect to the firing pin or in which the position to which the rear end of the barrel returns is not exactly centered with respect to the firing pin, is that the ignition of a shell by the firing pin may not be uniform so that accuracy is again affected adversely.

It is, therefore, one of the purposes of the present invention to provide improved accurizing structure for fire arms.

Another object is to provide improved structure for returning the rear end of an automatic pistol barrel to an exact predetermined el'evation after each firing thereof.

Another object is to provide improved means for returning the rear end of an automatic pistol barrel to an exact predetermined horizontal position after each firing thereof.

Another object is to provide a lock up ramp for the rear end of the barrel of a fire arm which is adjustable to vary the vertical position of the rear end of the barrel when in battery position.

Another object is to provide a lock up ramp for the rear end of the barrel of a fire arm which may be adjusted in height to center the rear end of the barrel in battery position with respect to the fire arm firing pin.

Another object is to provide a lock up ramp for the rear end of the barrel of a fire arm including structure for attaching the lock up ramp to the barrel which is locked in position against loosening by vibration.

ice

Another object is to provide a lock up ramp for the rear end of the barrel of a fire arm which provides three point suspension for the barrel in battery position to accurately return the barrel to an exact vertical and horizontal position after each firing of the fire arm.

Another object is to provide a lock up ramp for the rear end of the barrel of a fire arm constructed to provide structure for collecting sludge which formson firing of the fire arm.

Another object is to provide a lock up ramp for a pistol including means for supporting the read end of the pistol barrel in a position to prevent complete locking of the lugs of the barrel in the slide grooves whereby the barrel unlocks easier in use.

Another object is to provide lock up ramp structure for the read end of the barrel of a fire arm which is simple in construction, economical to manufacture and efiicient in use.

Other objects and features of the invention will become apparent as the description proceeds, especially when taken in conjunction with the accompanying draw-- ings, illustrating a preferred embodiment of the invention, wherein:

FIGURE 1 is a partly broken away partial elevation view of an automatic pistol including a combined barrel lock up ramp and rear sight constructed in accordance with the invention.

FIGURE 2 is a cross section view of the pistol portion and lock up ramp illustrated in FIGURE 1 taken substantially on the line 2- 2 of FIGURE 1.'

FIGURE 3 is an elevation view of the combined barrel lock up ramp and sight illustrated in FIGURE 1.

FIGURE 4 is a crosssection view similar to that of FIGURE 2 and illustrating a modified barrel lock up ramp.

FIGURE 5 is :a partly broken away partial elevation view of an automatic pistol including a barrel lock up slug constructed in accordance with the invention.

FIGURE 6 is a cross section view of the pistol portion and barrel lock up slug illustrated in FIGURE 5 taken substantially on the line 6--6 in FIGURE 5.

FIGURE 7 is a top elevation of the pistol portion and barrel lock up slug illustrated in FIGURE 5.

With particular reference to the figures of the drawing one embodiment of the present invention will now be considered in detail.

As shown best in FIGURE 1 in accordance with the invention, the automatic pistol I10, only a part of which is shown, is provided with a combination barrel lock up ramp and rear sight 12. In operation the lock up ramp and rear sight 12 provides a vertical and horizontal limiting abutment for the rear end 14 of the barrel 16 in the battery position .thereof as shown in FIGURE 1.

More specifically, the pistol 10 may be the Colt automatic pistol manufactured by Colts Patent Fire Arm Manufacturing Co. of Hartford, Connecticut, similar to that shown in United States Patent No. 1,563,675 and includes the slide 18 having the front sight 20 thereon,

'the locking slots 22 on the interior thereof, and the opening 24 extending therethrough through which the firing pin (not shown) is inserted.

The barrel 16 includes the locking lugs 26 thereon engageable in the slots 22 in the battery position of the barrel 16. Barrel 16 further includes the barrel link 28 pivoted thereto by the barrel link pin 30.

In the usual operation of the automatic pistol, the slide 18 is moved relative to the barrel from a rearward position forward to place the slide and barrel in the battery position shown in FIGURE 1. A barrel bushing 11 carried by the slide 18 establishes a single forward point of reference for the barrel 16.

During the movement of the slide toward the battery position the rear end 14 of the barrel 16 is in a lowered position so that the lugs 26 are positioned below the slots 22. As the battery position is reached the rear end 14 of the barrel 16 is pivoted upward through the barrel link 28 and pin 30 to insert the locking lugs 26 into the slots 22.

In the usual pistol structure the vertical position of the rear end 14 of the barrel 16 in battery position is determined by the position of the barrel link 28 which is pivoted on a slide stop pin (not shown). The horizontal position of the rear end 14 of the barrel 16 is determined by the movement of the hood 32 of the barrel 16 in a slot 34 in the slide 18. Thus the accuracy of the positioning of the rear end 14 of the barrel 16 in the operation of the usual pistol structure depends on the manufacturing tolerances of the slide stop pin, barrel link 28, barrel link pin 30 and the slot 34. With such structure the return of the rear end 14 of the barrel 16 to an exact predetermined position after each firing of the pistol is difiicult to obtain.

Therefore, in accordance with the invention, the top surface 36 of the end 38 of the slide 18 is machined to provide a bearing surface for the combination lock up ramp and rear sight 12. The lock up ramp and rear sight 12 is then secured to slide 18 to provide two reference locations for the rear end 14 of the barrel 16 whereby the barrel is in three point suspension in the battery position.

The lock up ramp and rear sight 12 includes the generally U-shaped member 40 having the openings 42 extending therethrough through which screws 44 extend into the top :of the slide 18 to screw the lock up ramp 12 to the slide 18.

A rear sight 46 is secured in the end 48 of the U-shaped member 40 by convenient means such as pivot pin 50. Rear sight 46 is vertically adjustable about the pivot pin 50 by means of the screw 52.

The lock up ramp 12 is provided with an axially extending recess 54 in the end 56 thereof as shown best in FIGURE 2. The end 56 of the U-shaped member 40 and the recess 54 extend over the hood 32 at the rear end 14 of the barrel 16 and provide a vertical abutment therefor so that each time the barrel 16 is brought to the battery position it is stopped in an exact vertical location. With the end 14 of barrel 16 in the exact vertical position the lugs 26 are slightly above the bottom of the slots 22 provided therefor. The barrel 16 is thus more easily unlocked than normally is the case when the lugs are seated fully in the slots 22.

As shown best in FIGURE 2, the recess 54 is in the form of a circular segment which segment has a diameter slightly less than the diameter of the apron 32 on the end 14 of barrel 16. Thus two

reference points

55 and 57 are provided for the rear end 14 of the gun barrel 16 which in conjunction with the single reference point for the front end of the barrel 16 provided by the bushing 11 provides exact three point suspension for the barrel 16.

The two reference points for the rear end 14 of the barrel 16 also provide an exact horizontal position for the rear end 14 of the barrel 16. With the bushing 11, the barrel 16 is thus located exactly horizontally as well as vertically on each return to the battery position thereof.

Again as shown best in FIGURE 2 a longitudinally extending groove 58 is provided in the recess 54. The groove 58 serves to collect sludge formed in the pistol 10 on operation thereof which might otherwise tend to prevent the rear end 14 of barrel 16 from seating in the recess 54 in the exact position after each firing of the pistol 10.

The U-shaped member 40 of the combined lock up ramp and rear sight 12 is further provided with a tapered lower surface 60 to permit some pivoting of the member 40 upon adjustment of the screws 44 to vary the height of the recess 54 and thus the vertical position of the end 4; 14 of barrel 16. The end 14 of barrel 16 may thus be accurately centered with the firing pin opening 24 to provide uniform ammunition ignition for exactly repeatable shots.

The lock up ramp screws 44 are held in adjusted position by the plate 62 positioned over the top thereof and held in place by means of pin 64. Thus there is no tendency for the screws 44 to become loose due to vibration on firing of the pistol 10.

A modification 66 of the lock up ramp and rear gun sight 12 is illustrated in FIGURE 4. In the modified lock up ramp and rear gun sight 66 the recess 68 is provided with an inverted V-shaped transverse cross section to again provide two vertical reference points for the rear end of gun barrel 70. The V-shaped recess 68 provides room at the apex for collection of sludge therein seating of the barrel 70 in the recess 68 of the lock up ramp and rear sight 66 is thus assured.

The modified lock up ramp or slug 72 illustrated in FIGURES 5 through 7 is provided in conjunction with a separate rear sight 7 4. With the structure illustrated in FIGURES 5 through 7 a slot 75 best shown in FIGURE 7 is machined in the slide 76 of a pistol 78 and the slug 72 having the arcuate recess 80 in the end 82 thereof, best shown in FIGURE 6, is secured in the slot 75 by adjusting screws 84.

The slug 82 is provided with the pivot portion 86 extending transversely centrally of the bottom thereof which in conjunction with the screws 84 permits vertical adjustment of the recess 80 to vary the vertical abutment provided for the hood 88 of gun barrel 90.

While one embodiment and modifications of the present invention have been considered in detail, it will be understood that other embodiments and modifications are contemplated by the inventor. It is the intention to include all modifications and embodiments of the invention as are defined in the appended claims within the scope of the invention.

What I claim as my invention is:

1. An automatic pistol including a slide and a barrel having a rear end and means for moving the barrel upwardly into the battery position thereof, a combination lock up ramp and rear sight secured to the top of the slide over the rear end of the barrel in the battery osition thereof providing an abutment to exactly position the rear end of the barrel in the battery position.

2. Structure as set forth in claim 1 wherein the lock up ramp is provided with a recess in the end thereof ex tending over the rear end of the gun barrel in the battery position into which a portion of the gun barrel extends to provide two point suspension for the rear end of the gun barrel.

3. Structure as set forth in claim 2 wherein the lock up ramp further includes a groove in the recess in the end thereof for the collection of sludge on operation of the pistol.

4. Structure as set forth in claim 3 wherein means are provided for adjusting the abutment vertically to exactly position the rear end of the gun barrel in the battery position and for securing the lock up ramp in an adjusted position.

5. Structure as set forth in claim 4 and further including a rear gun sight secured to the other end of the lock up ramp.

6. In a fire arm, a barrel, a lock up ramp abutment engageable with the end of said barrel in the battery position thereof for providing a predetermined position for the end of said barrel each time it is returned to the battery position and means for vertically adjusting the lock up ramp abutment to center the end of the barrel in the battery position.

7. An automatic pistol or the like including a gun barrel and a bushing for providing a single reference point for the front end of the gun barrel and lugs adjacent the rear end of the gun barrel for locking the gun barrel in the battery position and a lock up ramp comprising an abutment member secured to the pistol over the rear end of the pistol gun barrel in the battery position for providing an abutment against which the rear end of the gun barrel is urged when the gun barrel is in the battery position having a recess in the portion thereof over the rear end of the pistol gun barrel in the battery position, the recess having a transverse cross section in the form of a circular segment having a radius slightly less than that of the rear end of the barrel to provide two separate reference points for the rear end of the gun barrel in the battery position.

8. An automatic pistol or the like including a gun barrel and a bushing for providing a single reference point for the front end of the gun barrel and lugs adjacent the rear end of the gun barrel for locking the gun barrel in the battery position and a lock up ramp comprising an abutment member secured to the pistol over the rear end of the pistol gun barrel in the battery position for providing an abutment against which the rear end of the gun barrel is urged when the gun barrel is in the battery position having a recess in the portion thereof over the rear end of the pistol gun barrel in the battery position, the recess having a transverse cross section in the form of an inverted V to provide two separate reference points for the rear end of the gun barrel in the battery position.

9. An automatic pistol or the like including a gun barrel and a bushing for providing a single reference point for the front end of the gun barrel and lugs adjacent the rear end of the gun barrel for locking the gun barrel in the battery position and a lock up ramp comprising an abutment member secured to the pistol over the rear end of the pistol gun barrel in the battery position for providing an abutment against which the rear end of the gun barrel is urged when the gun barrel is in the battery position having a recess in the portion thereof extending over the rear end of the barrel in the battery position to provide two separate reference points and a groove within the recess extending longitudinally of the barrel for collecting sludge to prevent interference thereof with the abutment of the rear end of the barrel with the lock up ramp abutment.

10. An automatic pistol or the like including a gun barrel and a bushing for providing a single reference point for the front end of the gun barrel and lugs adjacent the rear end of the gun barrel for locking the gun barrel in the battery position, a lock up ramp comprising an abutment member secured to the pistol over the rear end of the pistol gun barrel in the battery position for providing an abutment against which the rear end of the gun barrel is urged when the gun barrel is in the battery position and including means for adjusting the vertical position of the portion of the lock up ramp abutment extending over the rear end of the barrel in the battery position thereof to exactly center the rear end of the gun barrel.

11. Structure as set forth in claim 10 wherein the means for adjusting the vertical position of the lock up ramp abutment comprises a tapered lower surface on the lock up ramp abutment and adjusting screws extending through the tapered surface and into the pistol.

12. An automatic pistol or the like including a gun barrel and a bushing for providing a single reference point for the front end of the gun barrel and lugs adjacent the rear end of the gun barrel for locking the gun barrel in the battery position, a lock up ramp comprising an abutment member secured to the pistol over the rear end of the pistol gun barrel in the battery position for providing an abutment against which the rear end of the gun barrel is urged when the gun barrel is in the battery position having a central pivot portion on the lower surface thereof extending transversely of the lock up ramp abutment and an adjusting screw at at least one end of the lock up ramp extending through the lower surface thereof and into the pistol.

13. An automatic pistol or the like including a gun barrel and a bushing for providing a single reference point for the front end of the gun barrel and lugs adjacent the rear end of the gun barrel for locking the gun barrel in the battery position, a look up ramp comprising an abutment member secured to the pistol over the rear end of the pistol gun barrel in the battery position for providing an abutment against which the rear end of the gun barrel is urged when the gun barrel is in the battery position, means for securing the lock up ramp to the pistol and means secured to the lock up ramp for securing the means for securing the ramp to the pistol in a predetermined position.

14. Structure as set forth in claim 13 wherein the means for securing the lock up ramp to the pistol comprises a plurality o-f screws set in the lock up ramp and extending through the lower surface thereof into the pistol and the means for securing the means for securing the ramp to the pistol comprises a locking plate secured in the lock up ramp over the screws.

References Cited by the Examiner UNITED STATES PATENTS 956,431 4/1910 Schrneisser 42-754 X 1,563,675 12/1925 Tansley 89-196 X 2,324,775 7/1943 Hentschel 42l6.2 X 2,632,272 3/1953 Holik 42-75 2,776,602 1/1957 Sturtevant 89-196 2,846,925 8/1958 Norman 89-196 X 2,975,680 3/1961 Wilson 89-196 3,110,223 11/1963 Schlappich 89-196 BENJAMIN A. BORCHELT, Primary Examiner.

SAMUEL FEINBERG, Examiner.

Claims

6. IN A FIRE ARM, A BARREL,A LOCK UP RAMP ABUTMENT ENGAGEABLE WITH THE END OF SAID BARREL IN THE BATTERY POSITION THEREOF FOR PROVIDING A PREDETERMINED POSITION FOR THE END OF SAID BARREL EACH TIME IT IS RETURNED TO THE BATTERY POSITION AND MEANS FOR VERTICALLY ADJUSTING THE LOCK UP RAMP ABUTMENT TO CENTER THE END OF THE BARREL IN THE BATTERY POSITION.