US808107A

US808107A - Magazine-gun.

Info

Publication number: US808107A
Application number: US17486103A
Authority: US
Inventors: Emroe A Mckeen
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-09-28
Filing date: 1903-09-28
Publication date: 1905-12-26
Anticipated expiration: 1922-12-26

Description

6, I M 2 n U. m. m M* a T O J w j@ M Q E. A. MGKEEN.

MAGAZINE GUN.

APPLICATION FILED sIIPT ze 190s MM If. u

bil

UNrrnn siagne PATENT OFFTO.

MAGAZINE-GUN.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application Hled September 28, 1903. Serial No. 174,861.

To (L// whom, t Wray concern.-

Be it known that I, EMROE A. MCKEEN, a subject of the King of Great Britain, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Magazine-Guns, of which the following description, in connection with the accompanying drawings, is a specification, like numerals on the drawings representing like parts.

This invention relates to a magazine-gun, and has for its object to improve generally this type of gun.

One of the features of the invention relates to a construction whereby the magazine operates both to hold the cartridges and to secure the back-stock to the receiver of the gun.

Another feature of the invention relates to means for controlling the feed of the cartridges from the magazine into the barrel; and still another feature relates to the means for ejecting the empty shells from the gun g and still another feature relates to the means for locking and unlocking and opening the action.

A construction embodying these various features of the invention is illustrated .in the drawings and will be more fully hereinafter described. i

Figure l is a top plan view of a gun embodying my improvements. Fig. 2 is a section on the line Fig. 1. Fig. 3 is a section on the line y y, Fig. 2. Figs. 4 and 5 are sections on the line a a, Fig. 2, showing different positions of the lock. Fig. 6 is a section on the line b b, Fig. 2. Fig. 7 is an enlarged view of the operative parts of the gun on the section-line fr Fig. 1, showing the action opened. Fig. S is a view of the parts below the line c c, Fig. 7. Fig. 9 is a section on the line d el, Fig. 7. Fig. 10 is a section on the line e e, Fig. 9. Fig. 1l is a vertical section through the pivot for the trigger.

6 designates the barrel of the gun, 5 the back-stock, and 3 a receiver to which the back-stock is secured and in which the barrel is slidably mounted. Said receiver has an opening 4 for the admission of cartridges to the magazine and also for the discharge of empty shells and is constructed with the portion 7, which constitutes the breech of the gun and in which the usual firing-pin 8 is mounted.

The magazine is designated by 9, and it is contained within the back-stock. In this form'of my invention said magazine is tubular in shape and constructed to receive aseries of cartridges, as shown in Fig. 2, said magazine communicating with the receiver, as will be presently described. The forward end of the back-stock is shaped, as at 10, to fit into the rear end of the receiver, and the magazine 9, which extends entirely through the back-stock, has screw-threaded on its rear end a nut 11, which engages the backstock and secures it to the receiver. The forward end of the magazine is rigidly secured to the receiver in any suitable way, as by screwthreading it into the boss 13 of the receiver. 'The end of the stock is covered by the usual plate 14. The magazine thus serves the double function of holding the cartridges and securing the stock to the receiver.

One feature of my invention relates to the manner in which the action is opened and closed. The rear end of the barrel is slidably mounted and telescopes in an aperture in the front end of the receiver, so that said barrel may be moved longitudinally from the position shown in Fig. 2, in which the action is closed, to that shown in Fig. 7, in which the action is opened. Vhen the barrel is in the position shown in Fig. 2, its end rests against the breech 7 of the gun and said barrel closes the opening 4 in the receiver. Suitable means hereinafter described are employed for locking the barrel in this position while 'the cartridge is fired; but when the barrel is unlocked it can be moved outwardly into the position shown in Fig. 7 to uncover the opening 4 in the receiver.

16 designates a collar fast to the barrel, and 17 is the usual forearm portion of the gun. The collar 16 is preferably so positioned that it engages the receiver 3 when the action is closed, as seen in Figs. 1 and 2.

The barrel is limited in its outward movement by a pin or stop 19, extending through the receiver, with which a shoulder 20 Ona locking member 18, rigid with the barrel, is adapted to be brought into engagement. (See Fig. 7 The rear end of the member 18 plays back and forth in a suitable opening in the lower portion of the receiver 3. The pin 19, which is a take-down stop, is preferably so mounted in the receiver that it can be partially withdrawn therefrom and removed from the path of the shoulder 20 to enable the barrel to be entirely removed from the receiver. Said pin 19 is herein illustrated as being normally held in place by means of a spring-pressed locking-pin 21, which engages a groove 22 therein. The end of the lockingpin 2l is rounding, so that by applying sufficient force to the exposed end of the takedown pin 19 the latter can be partially withdrawn from the receiver, and when this has occured the barrel can be entirely removed from the gun, as above stated. A second groove 200 in said take-down pin is engaged by the locking-pin for the purpose of preventing the take-down pin 19 from becoming lost. This manner of slidably mounting the barrel in the receiver enablesme to use a longer barrel without'increasing the total length of the gun, for when the gun is ready for firing the barrel is telescoped within the receiver, thereby reducing the total length of the gun.

I will now describe the means for feeding and controlling the feed of thc cartridges to the barrel. It will be observed that the point where the magazine opens into the receiver or the mouth of the magazine is so situated that when the action is closed the rear end of the barrel partially closes said magazinemouth, as seen in Fig. 2. Vhen, however, the action is opened, as shown in Fig. 7, the mouth of the receiver is exposed, so that cartridges may be placed in the magazine through the receiver-opening 4L.

23 designates a spring within the magazine and which normally tends to force the cartridgey toward the mouth thereof, said spring resting against a sliding follower 24, which is adapted to engage the last cartridge of the series.

25 is a restraining device which is adapted to engage the cartridge-shells vand prevent their being forced out of the magazine through the action of the spring 23. As the action is opened, as seen in Fig. 2, and the barrel removed from in front of the first cartridge m the spring 23 forces all of the cartridges toward the magazine-mouth and brings the second cartridge a against the restraining device 25, thus arresting further movement of the cartridges. During this movement the cartridge m has been carried into the receiver, as shown in Fig. 7, and into position to be picked up by the barrel 6 when the action is closed. The closing of the action releases the restraining device 25 and permits the cartridges to move again toward the magazine-mouth, so as to bring the second cartridge a against the barrel. In order thus to release the restraining device, I have shown the same as connected to the ejectorpin 26, by means of which the shells are ejected, as will be presently described, said pin being slidably mounted in the breech 7 and acted on by a suitable spring 27.

The particular restraining device herein shown has the catch 28, which projects through a slot in the wall of the magazine 9 and normally stands in the path of the flange 29 on the cartridge-shell, and also a toe 30, resting upon the inclined or cam surface 3l on the wall of the magazine. Said restraining device is illustrated as being pivoted to the end of the ejector-pin 26 in any suitable way and as carrying a spring 32. which ena lip 33 on the end of said pin and operates to yieldingly hold the restraining device in operative position. The ejector-pin 26 is provided at its free end with a lip 34, which is adapted to engage the under side of the Hange 29 of the cartridge-shell, as best seen in Fig. 7. Said pin normally projects slightly through the breech into the receiver 5 but when the action is closed, as shown in Fig. 2, the end of the cartridge-shell by its engagement with the ejector-pin forces the latter rearward, and thus carries the restraining device 25 in the same direction. This movement of the restraining device causes the toe 30 to ride over the inclined surface 3l and lifts the catch or shoulder 23 out of the path of the cartridges. The closing of the action therefore releases the restraining device, as above described. I have also provided means whereby when the action is opened the foremost cartridge will be prevented from falling out through the open receiver in case the gun is turned on its side or even bottom side up. This enables me to hre the gun in any position. In this form of my invention the portion 36 of the receiver constitutes the cradle on which the cartridge rests just as before it is picked up by the barrel when the action is closed, and said cradle or restrainer has the inclined surface 37, on which the cartridge rests, and the semi-annular shoulder 38, against which the head 29 of said cartridge abuts, as seen in Fig. 7.

The inclined surface 37is so positioned that the bullet or slug p of the cartridge stands in such position that during the closing of the action it enters the breech end of the barrel. (See Fig` 7.) The shoulder 38is so positioned that the distance between the same and the shoulder 28 of the restraining device is slightly less than the total length of the cartridge. With such construction whenever the action is opened the spring 23 operates to force the row of cartridges forward until the foremost cartridge engages the shoulder 38. At this time the second cartridge does not quite enthe shoulder 28, so that the full force of the spring 23 is transmitted through the successive cartridges to the foremost cartridge, and thus holds it firmly against the shoulder 3S and prevents said cartridge from being dislodged in any position of the gun. This same construction holds the cartridges in the magazine when the gun is taken down and the barrel entirely removed. I regard this as quite important, because incase it is necessary to entirely remove the barrel from the receiver for any reason it is unnecessary to remove the cartridges from the magazine, for the latter are securely held therein regardless of the position of the back-stock.

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To release the cartridge from the shoulder 38 to enable it to be picked up by the barrel when the action is closed, it is necessary to force the cartridge back slightly to bring the iange 29 thereof into the enlarged portion 39 of the cradle. This is accomplished by the backward movement of the gun-barrel, which by its 'friction with the cartridge as it picks it up first forces it backwardly slightly until the flange 29 has thus reached the enlarged portion 39, when the cartridge is fully released. Further backward movement of the barrel brings the cartridge against the breech, so that the cartridge is forced into the barrel, as shown in Fig. 2. foremost cartridge has been removed from in front of the second cartridge, the latter moves toward the receiver under the influence of the spring 23 until its flange 29 engages the restraining device 25. Vhen the action is entirely closed, the cartridge in the barrel is brought against the ejector-pin and the latter forced rearward, thereby removing the restraining device from the path of the flange 29, when the cartridges remaining in the magazine will move forwardly until the foremost one strikes the barrel, as seen in Fig. 2.

The operation of ej ecting the emptyshells will now be described.

40 designates a catch which is pivoted to a pin 41, carried by the receiver, and is acted against by a spring 42. The end of the catch is adapted to be received in a notch 44, formed in the end of the barrel when the action is closed to permit the nose 43 of the catch to pass over and engage the flange 29 of the cartridge.

Vhen the action is opened and the barrel withdrawn, the catch 40 by its engagement with the shell holds the latter from movement with the barrel, whereby the shell is extracted from the barrel. As soon as the shell is free from the barrel the ejector-pin 26 is given a quick forward impulse by the spring 27,' which results in throwing the shell out through opening 4, said shell turning about the catch 40 as a fulcrum.

I prefer to place the ejector-pin at an inclination to the barrel and in such a position that itsvforward movement will be substantially tangential to the curved path through which the bottom side of the shell-flange 29 travels as said shell is turned about the catch 40, so that there will be no appreciable sliding movement of the ejector-pin over the end of the shell, as would be the case if said pin stood parallel to the barrel.

In order that the ej ecting of the shells may be certain each time, it is essential that each shell should not drag over the end of the barrel as the shell clears the barrel. I prevent this by providing means whereby the movement of the barrel is accelerated just at the 'point when the shell is clearing the barrel.

In this form of my invention this accelera- When the tion of the movement of the barrel is accomplished by means of the cooperation of the cocking-lever 43aL and the cam-track 44a, which is formed on the locking member 18. The cocking-lever is pivoted to the guardpiece 45 by means of a suitable pin 46 and carries at one end a roll 47, adapted -to coperate with the cam-track 44a. At the other end the cooking-lever has pivoted thereto a paWl 48, which engages a notch or shoulder 49 on the hammer 50. When the action is closed, the cocking-lever normally assumes the position shown in Fig. 2, and as the barrel is withdrawn the roll 47 by its engagement With the cam-track 44'L gradually rocks the cooking-lever about its pivot and into the position shown in Fig. 7, this movement of the lever operating through the pawl 48 to cock the hammer, as will be obvious. The hammer is held cocked by means of the usual sear 51.

The track 44L is provided with the rise or point 57, which is so placed that the roll 47 passes thereover just prior to the time when the shell clears the barrel. Just after the roll 47 passes over the point 57 the movement of the barrel becomes easier, and since the operator is exerting approximately a uniform force in moving the barrel outward said barrel is given a quick movement just after the roll has passed the rise, such quick movement being at the time when the shell is clearing the barrel. The result is that the barrel is withdrawn suddenly from the end of the shell and all danger of the shell dragging over the barrels end is thus avoided.

The means for locking and 'unlocking the barrel will now be described.

As herein shown, the locking member 18 is provided at one side with a locking-notch 55, in which a locking projection 56 on the receiver is adapted to be engaged, as shown in Fig. 3. This locking projection can be disengaged from the locking-notch by turning the barrel on its aXis with reference to the receiver, the opening 58 in the receiver through which the locking member 18 passes being offset or enlarged to permit of such turning movement. The unlocking or locking of the action therefore merely consistsin turning the axis slightly with reference to the receiver.

For holding the locking-notch either in or out of operative position I have illustrated a locking lever or member 60, pivoted at one end to the guard 45, as at 61, and having two recesses or depressions 62, either one of which is adapted to receive a spring-pressed pin 63. Said member 60 has rising therefrom a lug 64, which when the action is closed is received in a slot or recess in the end of the locking member 18. (See Fig. 3.) I/Vhen the action is closed therefore, the turning movement of the barrel and the consequent swinging movement of the locking member-18 about the axis of the barrel operates through the lug 64'to IOO IIO

swing the locking-lever 60 from the position shown in Fig. 5 to that shown in Fig. 4, the spring-pressed pin 63 yielding sufficiently to admit of this movement. The engagement of the pin 63 in either of the recesses 62 operates to hold the locking-lever in its adjusted position, and thus prevents the barrel from being turned except by the use of considerable force.

The locking-lever 60 in addition to its function as a means for holding the action locked or unlocked also has the function of locking the trigger 52 when in the position shown in Fig. 4, thereby preventing any -possibility of the trigger being operated and the gun being ired when the action is opened, for it will be understood that in order to open the action it is necessary irst to unlock the barrel, as above described, and in so doing carry the locking-lever trom the position shown in Fig. 5 to that shown in Fig. 4. This locking of the trigger is accomplished by means of the end 68 of the locking-lever, which when in the position shown in Figs. 4 and 7 slides under the end 70 of the trigger and prevents the latter from being operated. When the locking-lever is in the position shown in Fig. 5, which is the position occupied by it when the action is closed and locked, the end 68 is carried out from under the end 70 of the trigger, thus permitting the latter to be freely operated. The above-described construction also operates to lock positively the action when the trigger is operated or the gun ired, so that it 'will be impossible for the action to become unlocked when the gun is being ire'd. It will be noted that when the action is locked the end 68 of the locking-lever stands one side or out of the path of movement of the end 70 of the trigger and that when the trigger is turned said end 70 is brought into the path of movement of the said end 68. The result is that when the gun is being ired the trigger absolutely prevents the locking-lever from being moved from the position illustrated in Fig. 5 to that illustrated in Fig. 4, and thus prevents the gun from becoming unlocked. I have also provided means whereby the swinging of the locking-lever from the position shown in Fig. 4 to that shown in 5 operates to throw the cocking-lever 43a into the position shown in Fig. 2 or into its operative position to cock the hammer. This insures that said cocking-lever will be thrown into proper position 'for cocking the hammer whenever the action is closed. To accomplish this, l mount in the block 45, in which the pin 63 is received, a pivoted lever 71, one end of which projects beyond said block and is received in a recess 72 in the cooking-lever. The other end is provided with the cam projection 73, which coperates with a cam-surface 74 on the locking-lever. (See Fig. 5.) This pin is situated to the left of the pivot of the cocking-lever. (See Fig. 7.) As the locking-lever is thrown from the position Fig. 4 into that shown in Fig. 5 the inclined surface 74, acting on the nose 73, locks the lever 71, and thus elevates that end thereof which engages the cocking-lever, thus throwing the latter into the position shown in Fig. 2.

The locking member 18 passes through the lug 101, which is rigid with the barrel and is held in position by means of nuts 102, which are situated either side of said lug. These nutsl not only serve to secure the locking member to the barrel, but also provide means whereby said member can be adjusted longitudinally of the barrel to take up wear between the locking proj ection56 and the shoulders of the locking-notch 55, whereby the butt-end of the barrel may always be held hard against the breech when the action is closed. 103 designates a check-nut which may be used, it desired, to still further strengthen the connection between the locking member and the barrel.

76 designates a safety-catch which is suitably pivoted in the block 45a and has the nose 77, which is adapted to be swung under a shoulder 7 8 on the trigger whenever it is desired to lock the trigger.

Normally the safety-catch occupies the position shown in Fig. 7. l regard the position in which the safety-catch is placed as very advantageous. It will be noted that said catch is immediately in iront of the trigger 52 andis so pivoted that its lower end has to be pushed forward in order to swing it into operative position. Being situated where it is, it can be very easily operated by the foreinger of the person using the gun without withdrawing his inger from the triggerguard, and because it requires a forward movement to throw the catch into operative position there is no danger of improperly manipulating the catch while the trigger is being operated. In most guns the safetycatch is placed so that in order to operate it the person using the gun has to remove his hand entirely from the trigger-guard. The sear is herein shown as having the two ears 51a, which are pivoted on the pivotal pin 98 for the trigger and between which said trigger plays. l

After the gun has been iired the first action is to turn the barrel slightly with reference to the receiver, and thus swing the locking-lever from the position shown in Fig. 5 to that shown in Fig. 4. This movement unlocks the barrel, so that the latter may be drawn outwardly into the position shown in Fig. 7 and at the same time locks the trigger, as above described. During this outward movement of the barrel the cocking-lever is acted upon by the track 44, and the hammer is cocked and also the shell is extracted and ejected from the receiver, as above described. To reload the gun, it is merely necessary to return the barrel to the position shown in ICO IIO

Figs. 1 and 2, this movement operating to pick up the foremost cartridge, as fully described above. After the action has been closed it is relocked by simply turning the barrel slightly back into its original position. The motions required of the person using the gun, therefore, are very simple, being merely a slight turning movement with the hand operating .the fore-arm and a back-and-forth movement of the barrel. This makes a gun which can be fired with extreme rapidity.

I/Vhile I have herein shown one embodiment of my invention, I do not wish to be limited to the details of construction shown, as the various operations performed and which I think are new can be carried out by mechanisms having different details of construction. I therefore reserve the right to myself to make any and all such changes as come within the scope of the appended claims.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a magazine-gun, a receiver, a magazine opening directly into said receiver and shaped to receive cartridges end to end, a barrel slidably mounted in the receiver and movable manually in both directions to cover and uncover the mouth of the magazine, said mouth being so situated with reference to the path of movement of the rear end of the barrel that the foremost cartridge in the magazine is picked up directly therefrom by said barrel during its backward movement, manually-controlled means to lock the gun while the cartridge is iired and means operated independently from the movement of the barrel to fire said cartridge.

2. In a magazine-gun, a receiver having an opening for the discharge of shells, a barrel slidably mounted in the receiver and movable manually in both directions, a magazine opening directly into the receiver shaped to receive cartridges arranged end to end and having an angular relation to the barrel, means in the magazine to feed cartridges forward therefrom into the receiver, manuallycontrolled means to lock the barrel from movement while the gun is being fired, and means to extract and eject the shell during the forward manual movement of the barrel, the mouth of the magazine being so situated with reference to the path of movement of the rear end of the barrel that the foremost cartridge in the magazine is picked up directly therefrom by said barrel during its backward movement.

3. In a magazine-gun, a receiver having an opening for the discharge of shells, a magazine opening directly into the receiver, a barrel slidably mounted in the receiver and manually movable exclusively to cover and uncover both the mouth of the magazine and said opening7 means to lock the barrel from movement while the gun is being fired, an eX- tractor-catch, and a spring-pressed ejectorpin, the mouth of the magazine being so situated that the foremost cartridge in the magazine is picked up directly from the magazine by said barrel during its backward movement.

4. Ina magazine-gun, a receiver, a maga zine communicating therewith, a restraining device to engage cartridges. about to be fed into the receiver, a shell-ejector, and means whereby the restraining device is released by the movement of the ejector.

5. In a gun, a barrel, a magazine, means to feed cartridges from the magazine to the barrel, a restraining device to hold all the cartridges against movement except the one being fed into the barrel while said cartridge is thus being fed, and means adapted to be operated by the cartridge as it is placed in position to be iired to render said restraining device inactive.

6. A receiver, a barrel movable relatively thereto, a magazine, means to feed cartridges from the magazine to the receiver, a restraining device to engage the foremost cartridge in the magazine, and automatic means to release the restraining device when the cartridge in the receiver is in position to be fired.

7. In a magazine-gun, a barrel, a magazine, means to feed cartridges singly to the barrel, said means including a restraining device to restrain the movement of allcartridges except the one entering the barrel, a shellejector, and connections between said ejector and restraining device whereby the latter is released by the backward movement of the former.

8. In a magazine-gun, a receiver, a barrel slidably mounted therein, a magazine, means to feed cartridges singly from the magazine to the barrel, said means including a restraining device to restrain the movement of all cartridges except the one entering the barrel, a shell-ejector, and means to move the re- IOO IIO

straining device into inoperative position by the backward movement of the ejector.

9. In a magazine-gun, a barrel, a magazine, means to feed cartridges singly to the barrel, said means including a restrainingcatch to engage the foremost cartridge in the magazine,Y a shell-ejector, and connections between said ejector and catch and means to release the catch as it is moved by the ejector whereby the latter is released bythe former.

10. In a magazine-gun, a barrel, a magazine, a shell-ejector pin, means to feed cartridges singly to the barrel, said means including a restraining-catch carried by said pin and adapted to engage the foremost cartridge in the magazine, and means whereby the movementl of the ector-pin into preparatory position for ejecting the shell releases the restraining-catch.

ll. In a magazine-gun, a barrel, a maga- ISO 'cept that 1n the barrel.

zine., means to feed cartridges to the barrel, an ejector-pin, a restraining-catch carried thereby and adapted to engage the cartridges as they are fed forward, and a cam on which said catch rests whereby movement of the pin into preparatory position for ejecting the shell causes the nose of the catch to ride up the cam and thus releases said catch from the cartridge.

12. In a magazine-gun, a barrel, a tubular magazine, means to feed cartridges from the magazine to the barrel, an ejector-pin, a restraining-catch carried thereby and projecting through the walls of the magazine, said restraining device having a nose resting on an inclined surface of said wall, whereby movement of the ejector-pin into position for ejecting the shell removes the catch from the path of the cartridges.

13. In a gun, a receiver having a portion constituting a breech, a barrel slidably mounted in said receiver and manually movable toward and from the breech, means to lock the barrel to the receiver while the gun is being fired, a tubular magazine communicating with the receiver and constructed to receive cartridges arranged end to end, and means within said magazine to feed cartridges into the receiver from the magazine at an angle to the direction of movement of the barrel whereby the foremost cartridge is picked up by the barrel during the movement of the latter toward the breech. y

14. In a gun, a receiver having a portion constituting` a breech, a barrel slidably` mounted in the receiver and movable manually' toward and from the breech, means to lock the barrel to the receiver while the gun is being fired, a tubular magazine communicating with said receiver and having its mouth so located that the foremost cartridge in the magazine is picked up directly by the barrel as the latter is moved toward the breech, and a restraining device to restrain the movement of all the cartridges in the magazine ex- 15. In a gun, a receiver having a portion constituting a breech, a barrel slidably mounted therein, means to withdraw the shell from the barrel as the latter is moved away from the breech, an ejector-pin engaging the shell, and means to vary the resistance to the forward movement of the barrel.

16. In a gun, a receiver having a portion constituting a breech, a barrel slidablv mounted in said receiver, means to withdraw the shell from the barrel as the latter is moved away from the breech, an ejector-pin engaging the shell, and means to resist the movement of the barrel, said means exerting a greater resistance during the latter part -of said movement.

17. In a gun, a receiver, a barrel slidably mounted therein, a catch to engage the shell and withdraw the latter from the barrel as it moves outwardly, an ejector-pin also engaging the shell, a cam-surface movable with the barrel, and a spring-pressed lever engaging said cam-surface, the latter having a rise intermediate of its ends.

18. In a gun, a receiver, a barrel slidably mounted therein, a shell-engaging catch to withdraw the shells from the barrel as the latter moves outwardly, an ejector-pin to enthe shell, a locking member rigid with the barrel and movable into and out of the receiver, said locking member having a camsurface provided with a rise, and a springpressed lever carried by the receiver and engaging said surface, whereby as the lever passes over the rise the resistance to the movement of the barrel varies.

19. In a gun, a receiver, a barrel slidably mounted therein, a catch carried by the receiver and adapted to engage and retain the shell as the barrel moves outwardly, an ejector-pin, a hammer, a locking member rigid with the barrel and movable into and out of the receiver, said locking member having a cam-surfaceprovided with. a riseintermediate of its ends, and a spring-pressed cocking-lever engaging said surface, whereby as the barrel moves outwardly to open the receiver the hammer is cocked and the resistance to the movement of the barrel varies.

20. In a magazine-gun, a receiver having a breech, a barrel slidably mounted in said receiver, and adapted to be manually moved both toward and from the breech, said barrel being capable of a slight Aturning movement in the receiver to lock it to said receiver, means to hold the barrel from turning movement while thegun is fired and a magazine communicating directly with the receiver.

21 In a magazine-gun, a receiver having a breech, a barrel slidably mounted in said receiver and movable manually both toward and from the breech, said barrel having a slight turning movement on its axis, and said barrel and receiver each having rigid therewith shoulders which are brought into or carried out of engagement by the turning movement of the barrel, means to hold said barrel from turning movement when the gun is fired and a magazine communicating directly with the receiver.

22. In a gun, a receiver, a barrel movable longitudinally thereof and capable of having a slight turning movement on its axis and alocking member beneath the barrel and rigid therewith, said member and receiver each having locking-shoulders which are brought into locking engagem ent by the turning movement of the barrel.

23. In a gun, a receiver, a barrel movable longitudinally thereof and capable of having a slight turning movement on its axis, and a longitudinal locking member beneath the barrel, said member and receiver each having locking-shoulders which are brought into IOC IIO

locking engagement by the turning movement of the barrel, and means to hold the shoulders in or out of engagement.

24. In a gun, a receiver, a barrel movable longitudinally thereof and capable of having 26. In a gun, a receiver, a barrel slidably mounted therein for manual movement in both directions and capable of turning slightly with reference to the receiver, means whereby the turning movement of the barrel in one direction both locks the latter to the receiver and also unlocks the trigger, and means to prevent the barrel from being turned when the cartridge is fired.

27. In a gun, a receiver, a barrel movable longitudinally thereof and capable of having a slight turning movement on its axis, a locking member rigid with the barrel, said locking member and receiver each having shoulders which are brought into engagement by the turning movement of the barrel, means to prevent the barrel from turning when the gun is fired, a trigger, and means whereby the manual turning movement of the barrel to unlock the latter locks the trigger.

28'. In a gun, a receiver, a barrel slidably mounted therein and capable of a slight turn# ing movement on its axis, means toprevent turning movement of the barrel as the gun is fired, a trigger, and means whereby the turning movement of the barrel in one direction both unlocks the latter from the receiver and also locks the trigger.

29.. In a gun, a receiver, a barrel slidably mounted therein and capable of turning slightly withreference thereto, means to prevent turning movement of the barrel when the gun is fired, a trigger, and means whereby the turning movement of the barrel in one direction both locks the latter to the receiver locks the barrel from the receiver and locks the trigger.

i 30. In a gun, a receiver, a barrel slidably mounted therein and capable of having a slight turnin movement on its axis, a locking member rigi with the barrel and adapted to interlock with a member rigid with the receiver as the barrel is turned, means to prevent the barrel from turning movement as the gun is fired, a trigger, and trigger-locking devices also operated by the turning movement of the barrel.

31. In a gun, a receiver, a barrel slidably mounted therein and capable of having a slight turning movement on its axis, a locking member rigid with the barrel and adapted to interlock with the receiver as the barrel is turned, a trigger, a lock for the trigger, and connections between said latter lock and the locking member whereby the trigger is locked when the barrel is unlocked and vice versa.

82. In a gun, a receiver, a barrel slidably mounted therein and capable of having a slight turning movement on its axis, a locking member rigid with the barrel and adapted to interlock with the receiver upon the turning movement of the barrel, a trigger, a trigger-locking lever pivoted to the receiver and engaging said locking member, wherebyas the barrel is unlocked the trigger is locked.

33. In a gun, a receiver, a barrel slidably mounted therein, barrel-locking devices, a trigger, and connections between said trigger and barrel-locking devices whereby the barrel is locked when the trigger is operated.

34. In a breech-loading gun, a receiver, a barrel slidable therein and turnable on its axis to lock and unlock it, and trigger-controlled means to prevent the barrel from turning when the trigger is operated to re the gun.

35. In a gun, a receiver, a removable barrel slidably mounted therein, a locking member rigid with the barrel and having opposed shoulders, a locking-pin to engage the shoulders of said locking member and thereby limit the movement of the barrel.

36. In a gun, a receiver, a removable barrel slidably mounted therein, a locking member rigid with the barrel and having opposed shoulders, a removable locking-pin carried by the receiver and when in position adapted to engage said shoulders.

In testimony whereof I have signed my name to this specification in the presence of two subscribing' witnesses.

EMROE A. MCKEEN. l

Witnesses:

Louis C. SMITH, NATHAN HEARD,

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