US3667343A - Means for attaching barrel to crossover slide for quick replacement - Google Patents
Means for attaching barrel to crossover slide for quick replacement Download PDFInfo
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- US3667343A US3667343A US889115A US3667343DA US3667343A US 3667343 A US3667343 A US 3667343A US 889115 A US889115 A US 889115A US 3667343D A US3667343D A US 3667343DA US 3667343 A US3667343 A US 3667343A
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- Prior art keywords
- barrel
- receiver
- sleeve
- locking collar
- rotation
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- Expired - Lifetime
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A7/00—Auxiliary mechanisms for bringing the breech-block or bolt or the barrel to the starting position before automatic firing; Drives for externally-powered guns; Remote-controlled gun chargers
- F41A7/08—Drives for externally-powered guns, i.e. drives for moving the breech-block or bolt by an external force during automatic firing
- F41A7/10—Drives for externally-powered guns, i.e. drives for moving the breech-block or bolt by an external force during automatic firing using a rotating cylindrical drum having a camming groove
Definitions
- a crossover slide is slidingly mounted in a longitudinal slot through the receiver and is slidingly engaged with cam tracks in the drum to convert rotation thereof to translational movement and transmit the translational movement through the receiver.
- Flanges on the crossover slide are engageable by cooperating flanges on the barrel responsive to rotation thereof to connect the crossover slide to the barrel for translation therewith.
- a sleeve is slidingly mounted on the barrel and is provided with a lug receivable by a recess in the receiver and longitudinal grooves slidingly engaged with cooperating ribs on the barrel to prevent relative rotation of the barrel and receiver when the lug is located in the recess. The sleeve is blocked against displacement to maintain the lug in the recess by locking collar rotatingly mounted to the receiver by bayonet lug means.
- lt is a further object of this invention to provide as means for converting rotary movement of the drum to translation of the barrel a crossover slide which is slidingly mounted in a longitudinal slot through the receiver for engagement with cam tracks in the drum, and which is provided with flanges engageable by rotation of the barrel with cooperating flange means on the barrel for connection thereof with the crossover slide.
- F IG. 1 is a fragmentary, longitudinally cross-sectioned view taken along the central horizontal plane of an automatic gun at the area of the barrel actuating drum and shows the barrel and crossover slide locked together;
- FIG. 2 is a cross-sectional view taken along line 22 of FIG. 1 showing the locking collar in the locked position;
- FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 1;
- FIG. 4 is a view similar to FIG. 2 but showing the locking collar rotated 45 to the unlocked position to permit forward displacement of the barrel sleeve;
- FIG. 5 is a cross-sectional view similar to FIG. 3 but showing the barrel rotated 90 clockwise for removal from the receiver;
- FIG. 6 is a cross-sectional view similar to FIG. 1 but showing the barrel sleeve displaced forwardly and the barrel unlocked from the crossover slide and displaced rearwardly for removal;
- FIG. 7 is a perspective view of the crossover slide
- FIG. 8 is a fragmentary, perspective view of the barrel.
- FIG. 9 is a perspective view of the locking sleeve.
- an automatic gun 12 such as is disclosed in U. S. Pat. No. 3,241,448 to J. G. Rocha for Cir cuitous Cam Track With Crossovers and Follower Device Therefor.
- Such gun 12 comprises a receiver 14, a barrel 16 disposed in the receiver for longitudinal reciprocation between a rearward battery position and a forward loading position. Displacement of barrel 16 is efi'ected by a drum 18 which encircles receiver 14 and is journaled thereon for rotation by motor means (not shown). Rotation of drum 18, through the cooperation of a crossover slide 20 with cam track 22 in the drum, is converted to translational movement which is transmitted through receiver 14 to barrel 16, as described in the aforementioned patent.
- crossover slide 20 is mounted,.as hereinafter described, in a closed longitudinal slot 24 which extends through receiver 14 between a front end 26 and rear end 28. Ends 26 and 28 are spaced sufficiently to permit longitudinal travel of crossover slide 20 with barrel 16 during displacement thereof between the forward and rearward positions.
- Crossover slide 20 comprises a body 30 which is essentially of rectangular configuration, as especially shown in FIG. 7, with a channel 32 formed along the inside thereof to conform to the outside surface of barrel 16 where the crossover slide makes contact therewith.
- a front flange 34 Extending from the front end of body 30 at the inside edge thereof, as shown in FIGS. 1, 5 and 7, is a front flange 34, and a rear flange 36 extends similarly from the rear end.
- Flanges 34 and 36 are arcuate in configuration and the inside surfaces thereof are flush with the channeled inside surface of body 30 to form extensions thereof.
- a roller bearing 38 mounted to each comer of body 30 so as to extend from the sides thereof.
- pins 40 which, when crossover slide 20 is located in slot 24 and they are in contact with the outside surface of receiver 14, position the slide for assembly to the barrel.
- a well 42 extends into body 30 from the outside surface thereof for rotatingly receiving shaft 44 of a blade 46 which has sliding engagement with cam track 22 as fully explained in the aforementioned patent.
- barrel 16 is provided with an annular rib 50 which is undercut from the front side to form a channel 52 and a forwardly extending lip 54, which are both concentric with the axis of the barrel.
- Channel 52 is dimensioned to slidingly receive rear flange 36 when barrel 16 is installed forwardly into receiver 14 from the rear end thereof as shown in FIG. 1.
- Extending from the outside of barrel 16 forwardly of rib 50 is a rearwardly extending tongue 68 which is arcuately fon'ned concentric with the axis of the barrel and is spaced from the rib so as to extend over front flange 34, when rear flange 36 is located in channel 52, to secure crossover slide 20 against longitudinal and radial displacement relative to the barrel.
- lugs 76 Extending radially from the outside of sleeve 70, adjacent the front end thereof, are diametrically opposed lugs 76 which are receivable by cooperating recesses 78 in the front end of receiver 14 to secure the sleeve against rotation respective to receiver 14 so that the sleeve serves as an interlock to prevent rotation between the receiver and barrel l6. Longitudinal displacement of sleeve 70, when lugs 76 are located in recesses 78, is
- a locking collar 80 which is journaled on the front end of receiver 14 for rotation between a locking and unlocked position.
- Collar 80 is provided with an integral flange 81 at the front end which has a bore 83 slightly larger than the outside diameter of sleeve 70 and which is contactable by lugs 76, when the collar is in the locking position, to block displacement of the lugs from recesses 78, as shown in FIG. 1.
- cooperating bayonet lugs 82 and 84 are provided on the front end of receiver 14 and inside of locking collar 80, respectively, which, when in engagement, secure the collar to the receiver and so block forward displacement of sleeve 70 and maintain lugs 76 in recesses 78.
- Bayonet lugs 84 are arranged to be rotated 60 for full engagement and provided in the inside circumference of flange 81 are two clearance holes 86 which are alignable with lugs 76 on sleeve 70 when locking collar 80 is rotated 45 from its locking position to the unlocked position, as shown in FIG. 4.
- Locking collar '80 is releasably secured in the locking and unlocked positions through the cooperation of a spring-biased plunger 88 with holes 90 in the collar, as shown in FIGS. 2 and 4.
- crossover slide which also assists in converting rotation of drum 18 to translational movement and directly transmits the translational movement to the barrel.
- Crossover slide 20 is locked to barrel 16 through the cooperation of front flange 34 on the slide with tongue 68 and of rear flange 36 with lip 54.
- Barrel 16 is held against rotation, to maintain crossover slide 20 locked thereto, through locking sleeve 70 which provides an interlock between the barrel and receiver.
- Locking collar 80 prevents forward displacement of locking sleeve 70 and removal of lugs 76 from recesses 78.
- plunger 88 is depressed out of the related hole 90, permitting rotation of locking collar 80 to where the plunger is indexed in the other one of the holes so that the collar is located in its unlocked position with bayonet lugs 82 and 84 retaining the locking collar on receiver 14.
- Clearance holes 86 are thereby aligned with lugs 76, which permits forward displacement of sleeve 70 relative to receiver 14, as shown in FIG. 6, to where the lugs are free of recesses 78.
- This permits rotation of barrel 16 90 to where tongue 68 is free of front flange 34, as shown in FIG. 5, whereby barrel 16 is free to be withdrawn rearwardly from the receiver thus freeing rear flange 36 from lip 54.
- Barrel 16 is reinstalled by reversing the above noted steps.
- an automatic gun comprising a receiver, a drum journaled to the exterior of the receiver for rotation thereon and a barrel disposed for translational displacement in said receiver, a crossover slide mounted to the receiver and disposed for engagement with cam tracks in the drum for converting rotation thereof to translational movement and transmitting the translational movement through the receiver, means mounting said crossover slide to the barrel by rotation thereof relative to said crossover slide, and means for preventing relative rotation of the barrel and said crossover slide when interconnected to prevent disconnection thereof.
- crossover slide includes a body essentially rectangular in configuration, a roller bearing mounted to each corner of said body for rolling contact with respective sides of said slot, and a channel formed along the side of said body located within the receiver conforming to the outside circumference of the barrel for mating contact therebetween.
- said means for releasably connecting said crossover slide to the barrel comprises on said body a front flange extending forwardly therefrom, a rear flange extending rearwardly from said body, an annular rib around the barrel, an annularchannel formed in the front side of said rib for slidably receiving said rear flange, a tongue located on the barrel forwardly of said rib and formed to extend rearwardly towards said rib, said tongue being arranged to move over said front flange when said rear flange is located in said channel and the barrel is rotated relative to said crossover slide to secure said crossover slide against radial and longitudinal displacement relative to the barrel.
- said means for preventing rotation of the barrel relative to said crossover slide comprises a sleeve slidingly mounted on the barrel forwardly of said tongue, lug means on said sleeve receivable by mating recesses in the receiver to prevent rotary displacement of said sleeve relative thereto, rib means disposed longitudinally along the exterior of the barrel, grooves formed inside of said sleeve for slidingly receiving said rib means to permit relative translational displacement of said barrel and said sleeve and prevent relative rotary displacement thereof.
- said means for securing said sleeve against translational displacement comprises a locking collar journaled on the front end of the receiver for rotation between a locking and an unlocked position, and an integral flange on the front end of said locking collar provided with a concentric bore having a diameter slightly larger than the outside diameter of said sleeve and disposed concentric thereto, said flange being contactable by said lug means when said locking collar is in the locking position to block displacement of said lug means from said mating recesses, clearance holes in said flange of said locking collar respectively alignable with said lug means when said locking collar is in the unlocking position to free said sleeve for translational displacement and removal of said lug means from said mating recesses, and means for releasably retaining said locking collar on said receiver.
- said means for retaining said locking collar on the receiver comprises cooperating bayonet lugs in said locking collar and on said receiver, said bayonet lugs being arranged for full engagement responsive to approximately 60 rotation of said locking collar elative to said receiver, and rotation of said locking collar between the locked and unlocking positions is arranged to be approximately 45 so that said locking collar is securely held by said bayonet lugs on the receiver when .in the unlocking position.
Abstract
In an automatic gun comprising a drum journaled for rotation around the exterior of the receiver and a barrel disposed for reciprocation therein, a crossover slide is slidingly mounted in a longitudinal slot through the receiver and is slidingly engaged with cam tracks in the drum to convert rotation thereof to translational movement and transmit the translational movement through the receiver. Flanges on the crossover slide are engageable by cooperating flanges on the barrel responsive to rotation thereof to connect the crossover slide to the barrel for translation therewith. A sleeve is slidingly mounted on the barrel and is provided with a lug receivable by a recess in the receiver and longitudinal grooves slidingly engaged with cooperating ribs on the barrel to prevent relative rotation of the barrel and receiver when the lug is located in the recess. The sleeve is blocked against displacement to maintain the lug in the recess by locking collar rotatingly mounted to the receiver by bayonet lug means.
Description
United States Patent Jurkowski et al.
[ 1 June 6, 1972 [72] Inventors: Chester P. Jurkowski, Budd Lake; Mitsle W. Kruzel, Flanders, both of NJ.
[73] Assignee: The United States of America as represented by the Secretary of the Army 22 Filed: Dec. 30, 1969 211 Appl.No.: 889,115
[52] US. CL. ..89/161 [5]] Int. Cl "F4" 17/00 [58] Field Of Search ..42/10,ll, 75.2; 39/14, 160, 89/l6l [56] References Cited UNITED STATES PATENTS 324L448 3/1966 Rocha ..89/l6l Primary Examiner-Benjamin A. Borchelt Assistant Examiner-Stephen C. Bentley Attorney-Harry M. Saragovitz, Edward J. Kelly, Herbert Berl and Albert E. Arnold, Jr.
[ ABSTRACT In an automatic gun comprising a drum joumaled for rotation around the exterior of the receiver and a barrel disposed for reciprocation therein, a crossover slide is slidingly mounted in a longitudinal slot through the receiver and is slidingly engaged with cam tracks in the drum to convert rotation thereof to translational movement and transmit the translational movement through the receiver. Flanges on the crossover slide are engageable by cooperating flanges on the barrel responsive to rotation thereof to connect the crossover slide to the barrel for translation therewith. A sleeve is slidingly mounted on the barrel and is provided with a lug receivable by a recess in the receiver and longitudinal grooves slidingly engaged with cooperating ribs on the barrel to prevent relative rotation of the barrel and receiver when the lug is located in the recess. The sleeve is blocked against displacement to maintain the lug in the recess by locking collar rotatingly mounted to the receiver by bayonet lug means.
8 Claims, 9 Drawing Figures MEANS FOR A'I'IACHING BARREL TO CROSSOVER SLIDE FOR QUICK REPLACEMENT The invention described herein may be manufactured, used and licensed by or for the Government for governmental purposes without the payment to us of any royalty thereon.
BACKGROUND OF THE INVENTION "transmitting the translational movement through the receiver to the barrel.
SUMMARY OF THE INVENTION Difficulty has been encountered in the design of this weapon as to the means for converting the rotary movement of the drum to translational movement and transmitting the translational movement through the receiver to the barrel because all previous designs require a complicated and time consuming procedure for the replacement of the barrel.
It is therefore the principal object of this invention to provide for such a weapon having a drum mounted external of the weapons receiver for rotation therearound and a barrel disposed for translational displacement therein means for converting rotation of the drum to translation of the barrel and at the same time provide for quick replacement of the barrel without removing any parts of the weapon.
lt is a further object of this invention to provide as means for converting rotary movement of the drum to translation of the barrel a crossover slide which is slidingly mounted in a longitudinal slot through the receiver for engagement with cam tracks in the drum, and which is provided with flanges engageable by rotation of the barrel with cooperating flange means on the barrel for connection thereof with the crossover slide.
It is another object of this invention to provide a sleeve slidingly mounted on the barrel with engaging means for interlocking the barrelto the receiver to prevent rotation of the barrel relative thereto and disconnection from the crossover slide, and a locking collar rotatingly mounted on the receiver to releasably block displacement of thesleeve and release of the barrel from the receiver.
Further objects and advantages of the invention will be apparent from the following specification and the accompanying drawings which are for the purpose of illustration only.
BRIEF DESCRIPTION OF THE DRAWINGS F IG. 1 is a fragmentary, longitudinally cross-sectioned view taken along the central horizontal plane of an automatic gun at the area of the barrel actuating drum and shows the barrel and crossover slide locked together;
FIG. 2 is a cross-sectional view taken along line 22 of FIG. 1 showing the locking collar in the locked position;
FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 1;
FIG. 4 is a view similar to FIG. 2 but showing the locking collar rotated 45 to the unlocked position to permit forward displacement of the barrel sleeve;
FIG. 5 is a cross-sectional view similar to FIG. 3 but showing the barrel rotated 90 clockwise for removal from the receiver;
FIG. 6 is a cross-sectional view similar to FIG. 1 but showing the barrel sleeve displaced forwardly and the barrel unlocked from the crossover slide and displaced rearwardly for removal;
FIG. 7 is a perspective view of the crossover slide;
FIG. 8 is a fragmentary, perspective view of the barrel; and
FIG. 9 is a perspective view of the locking sleeve.
DESCRIPTION OF THE PREFERRED EMBODIMENT Shown in the figures is an automatic gun 12 such as is disclosed in U. S. Pat. No. 3,241,448 to J. G. Rocha for Cir cuitous Cam Track With Crossovers and Follower Device Therefor. Such gun 12 comprises a receiver 14, a barrel 16 disposed in the receiver for longitudinal reciprocation between a rearward battery position and a forward loading position. Displacement of barrel 16 is efi'ected by a drum 18 which encircles receiver 14 and is journaled thereon for rotation by motor means (not shown). Rotation of drum 18, through the cooperation of a crossover slide 20 with cam track 22 in the drum, is converted to translational movement which is transmitted through receiver 14 to barrel 16, as described in the aforementioned patent. Such crossover slide 20 is mounted,.as hereinafter described, in a closed longitudinal slot 24 which extends through receiver 14 between a front end 26 and rear end 28. Ends 26 and 28 are spaced sufficiently to permit longitudinal travel of crossover slide 20 with barrel 16 during displacement thereof between the forward and rearward positions.
As shown in FIGS. 1 and 8, barrel 16 is provided with an annular rib 50 which is undercut from the front side to form a channel 52 and a forwardly extending lip 54, which are both concentric with the axis of the barrel. Channel 52 is dimensioned to slidingly receive rear flange 36 when barrel 16 is installed forwardly into receiver 14 from the rear end thereof as shown in FIG. 1. Extending from the outside of barrel 16 forwardly of rib 50 is a rearwardly extending tongue 68 which is arcuately fon'ned concentric with the axis of the barrel and is spaced from the rib so as to extend over front flange 34, when rear flange 36 is located in channel 52, to secure crossover slide 20 against longitudinal and radial displacement relative to the barrel.
When barrel 16 is rotated so that front flange 34 is located under tongue 68, and rear flange 36 is located in channel 52, the barrel is secured against further rotation in receiver 14 by a locking sleeve 70 which is mounted on barrel l6 forwardly of tongue 68 for sliding relative displacement. Sleeve 70 is retained against rotation relative to barrel 16 by means of Iongitudinal ribs 72 thereon which are slidingly engaged with cooperating grooves 74 inside of the sleeve. Ribs 72 extend sufficiently to assure engagement thereof with grooves 74 during reciprocal travel of barrel l6. Extending radially from the outside of sleeve 70, adjacent the front end thereof, are diametrically opposed lugs 76 which are receivable by cooperating recesses 78 in the front end of receiver 14 to secure the sleeve against rotation respective to receiver 14 so that the sleeve serves as an interlock to prevent rotation between the receiver and barrel l6. Longitudinal displacement of sleeve 70, when lugs 76 are located in recesses 78, is
prevented by a locking collar 80 which is journaled on the front end of receiver 14 for rotation between a locking and unlocked position. Collar 80 is provided with an integral flange 81 at the front end which has a bore 83 slightly larger than the outside diameter of sleeve 70 and which is contactable by lugs 76, when the collar is in the locking position, to block displacement of the lugs from recesses 78, as shown in FIG. 1. Provided on the front end of receiver 14 and inside of locking collar 80 are cooperating bayonet lugs 82 and 84, respectively, which, when in engagement, secure the collar to the receiver and so block forward displacement of sleeve 70 and maintain lugs 76 in recesses 78. Bayonet lugs 84 are arranged to be rotated 60 for full engagement and provided in the inside circumference of flange 81 are two clearance holes 86 which are alignable with lugs 76 on sleeve 70 when locking collar 80 is rotated 45 from its locking position to the unlocked position, as shown in FIG. 4. Thus, when locking collar 80 is in the unlocked position, it is maintained on receiver 14 through the cooperation of bayonet lugs 82 and 84, and sleeve 70 is free to be moved forwardly sufficiently to remove lugs 76 from their cooperating recesses 78. Locking collar '80 is releasably secured in the locking and unlocked positions through the cooperation of a spring-biased plunger 88 with holes 90 in the collar, as shown in FIGS. 2 and 4.
OPERATION When gun 12 is ready for operation, barrel 16 is locked to receiver 14 by means of crossover slide which also assists in converting rotation of drum 18 to translational movement and directly transmits the translational movement to the barrel. Crossover slide 20 is locked to barrel 16 through the cooperation of front flange 34 on the slide with tongue 68 and of rear flange 36 with lip 54. Barrel 16 is held against rotation, to maintain crossover slide 20 locked thereto, through locking sleeve 70 which provides an interlock between the barrel and receiver. Locking collar 80 prevents forward displacement of locking sleeve 70 and removal of lugs 76 from recesses 78.
To remove barrel 16, plunger 88 is depressed out of the related hole 90, permitting rotation of locking collar 80 to where the plunger is indexed in the other one of the holes so that the collar is located in its unlocked position with bayonet lugs 82 and 84 retaining the locking collar on receiver 14. Clearance holes 86 are thereby aligned with lugs 76, which permits forward displacement of sleeve 70 relative to receiver 14, as shown in FIG. 6, to where the lugs are free of recesses 78. This permits rotation of barrel 16 90 to where tongue 68 is free of front flange 34, as shown in FIG. 5, whereby barrel 16 is free to be withdrawn rearwardly from the receiver thus freeing rear flange 36 from lip 54. Barrel 16 is reinstalled by reversing the above noted steps.
We wish it to be understood that we do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.
We claim:
1. In an automatic gun comprising a receiver, a drum journaled to the exterior of the receiver for rotation thereon and a barrel disposed for translational displacement in said receiver, a crossover slide mounted to the receiver and disposed for engagement with cam tracks in the drum for converting rotation thereof to translational movement and transmitting the translational movement through the receiver, means mounting said crossover slide to the barrel by rotation thereof relative to said crossover slide, and means for preventing relative rotation of the barrel and said crossover slide when interconnected to prevent disconnection thereof.
2. The invention as defined in claim 1 including a longitudinal closed slot formed through the receiver, and wherein said crossover slide includes a body essentially rectangular in configuration, a roller bearing mounted to each corner of said body for rolling contact with respective sides of said slot, and a channel formed along the side of said body located within the receiver conforming to the outside circumference of the barrel for mating contact therebetween.
3. The invention as defined in claim 2 wherein said means for releasably connecting said crossover slide to the barrel comprises on said body a front flange extending forwardly therefrom, a rear flange extending rearwardly from said body, an annular rib around the barrel, an annularchannel formed in the front side of said rib for slidably receiving said rear flange, a tongue located on the barrel forwardly of said rib and formed to extend rearwardly towards said rib, said tongue being arranged to move over said front flange when said rear flange is located in said channel and the barrel is rotated relative to said crossover slide to secure said crossover slide against radial and longitudinal displacement relative to the barrel.
4. The invention as defined in claim 3 wherein said means for preventing rotation of the barrel relative to said crossover slide comprises a sleeve slidingly mounted on the barrel forwardly of said tongue, lug means on said sleeve receivable by mating recesses in the receiver to prevent rotary displacement of said sleeve relative thereto, rib means disposed longitudinally along the exterior of the barrel, grooves formed inside of said sleeve for slidingly receiving said rib means to permit relative translational displacement of said barrel and said sleeve and prevent relative rotary displacement thereof.
5. The invention as defined in claim 4 and including means for releasably securing said sleeve against translational displacement relative to the receiver when said sleeve is located to position said lug means in said mating recesses.
6. The invention as defined in claim 5 wherein said means for securing said sleeve against translational displacement comprises a locking collar journaled on the front end of the receiver for rotation between a locking and an unlocked position, and an integral flange on the front end of said locking collar provided with a concentric bore having a diameter slightly larger than the outside diameter of said sleeve and disposed concentric thereto, said flange being contactable by said lug means when said locking collar is in the locking position to block displacement of said lug means from said mating recesses, clearance holes in said flange of said locking collar respectively alignable with said lug means when said locking collar is in the unlocking position to free said sleeve for translational displacement and removal of said lug means from said mating recesses, and means for releasably retaining said locking collar on said receiver.
7. The invention as defined in claim 6 wherein said means for retaining said locking collar on the receiver comprises cooperating bayonet lugs in said locking collar and on said receiver, said bayonet lugs being arranged for full engagement responsive to approximately 60 rotation of said locking collar elative to said receiver, and rotation of said locking collar between the locked and unlocking positions is arranged to be approximately 45 so that said locking collar is securely held by said bayonet lugs on the receiver when .in the unlocking position.
8. The invention as defined in claim 7 and including springbiased plunger means arranged for releasably securing said locking collar in the locked and unlocking positions.
Claims (8)
1. In an automatic gun comprising a receiver, a drum journaled to the exterior of the receiver for rotation thereon and a barrel disposed for translational displacement in said receiver, a crossover slide mounted to the receiver and disposed for engagement with cam tracks in the drum for converting rotation thereof to translational movement and transmitting the translational movement through the receiver, means mounting said crossover slide to the barrel by rotation thereof relative to said crossover slide, and means for preventing relative rotation of the barrel and said crossover slide when interconnected to prevent disconnection thereof.
2. The invention as defined in claim 1 including a longitudinal closed slot formed through the receiver, and wherein said crossover slide includes a body essentially rectangular in configuration, a roller bearing mounted to each corner of said body for rolling contact with respective sides of said slot, and a channel formed along the side of said body located within the receiver conforming to the outside circumference of the barrel for mating contact therebetween.
3. The invention as defined in claim 2 wherein said means for releasably connecting said crossover slide to the barrel comprises on said body a front flange extending forwardly therefrom, a rear flange extending rearwardly from said body, an annular rib around the barrel, an annular channel formed in the front side of said rib for slidably receiving said rear flange, a tongue located on the barrel forwardly of said rib and formed to extend rearwardly towards said rib, said tongue being arranged to move over said front flange when said rear flange is located in said channel and the barrel is rotated relative to said crossover slide to secure said crossover slide against radial and longitudinal displacement relative to the barrel.
4. The invention as defined in claim 3 wherein said means for preventing rotation of the barrel relative to said crossover slide comprises a sleeve slidingly mounted on the barrel forwardly of said tongue, lug means on said sleeve receivable by mating recesses in the receiver to prevent rotary displacement of said sleeve relative thereto, rib means disposed longitudinally along the exterior of the barrel, grooves formed inside of said sleeve for slidingly receiving said rib means to permit relative translational displacement of said barrel and said sleeve and prevent relative rotary displacement thereof.
5. The invention as defined in claim 4 and including means for releasably securing said sleeve against translational displacement relative to the receiver when said sleeve is located to position said lug means in said mating recesses.
6. The invention as defined in claim 5 wherein said means for securing said sleeve against translational displacement comprises a locking collar journaled on the front end of the receiver for rotation between a locking and an unlocked position, and an integral flange on the front end of said locking collar provided with a concentric bore having a diameter slightly larger than the outside diameter of said sleeve and disposed concentric thereto, said flange being contactable by said lug means when said locking collar is in the locking position to block displacement of said lug means from said mating recesses, clearance holes in said flange of said locking collar respectively alignable with said lug means when said locking collar is in the unlocking position to free said sleeve for translational displacement and removal of said lug means from said mating recesses, and means for releasably retaining said locking collar on said receiver.
7. The invention as defined in claim 6 wherein said means for retaining said locking collar on the receiver comprises cooperating bayonet lugs in said locking collar and on said receiver, said bayonet lugs being arranged for full engagement responsive to approximately 60* rotation of said locking collar elative to said receiver, and rotation of said locking collar between the locked and unlocking positions is arranged to be approximately 45* so that said locking collar is securely held by said bayonet lugs on the receiver when in the unlocking position.
8. The invention as defined in claim 7 and including spring-biased plunger means arranged for releasably securing said locking collar in the locked and unlocking positions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88911569A | 1969-12-30 | 1969-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3667343A true US3667343A (en) | 1972-06-06 |
Family
ID=25394531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US889115A Expired - Lifetime US3667343A (en) | 1969-12-30 | 1969-12-30 | Means for attaching barrel to crossover slide for quick replacement |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3667343A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4011790A (en) * | 1975-07-28 | 1977-03-15 | General Electric Company | Recoil converter for self powered gun |
| US9879935B2 (en) * | 2016-03-29 | 2018-01-30 | Leo Takedown, Llc | Quick take-down firearm |
| US10222157B2 (en) | 2016-03-29 | 2019-03-05 | Leo Takedown, Llc | Quick take-down firearm |
| US10830551B2 (en) | 2016-03-29 | 2020-11-10 | Leo Takedown, Llc | Quick take-down firearm |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3241448A (en) * | 1964-12-03 | 1966-03-22 | John G Rocha | Circuitous cam track with crossovers and follower device therefor |
-
1969
- 1969-12-30 US US889115A patent/US3667343A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3241448A (en) * | 1964-12-03 | 1966-03-22 | John G Rocha | Circuitous cam track with crossovers and follower device therefor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4011790A (en) * | 1975-07-28 | 1977-03-15 | General Electric Company | Recoil converter for self powered gun |
| US9879935B2 (en) * | 2016-03-29 | 2018-01-30 | Leo Takedown, Llc | Quick take-down firearm |
| US10222157B2 (en) | 2016-03-29 | 2019-03-05 | Leo Takedown, Llc | Quick take-down firearm |
| US10830551B2 (en) | 2016-03-29 | 2020-11-10 | Leo Takedown, Llc | Quick take-down firearm |
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