US1329922A - Machine-gun - Google Patents

Description

J. F.'0"MALLEY.

MACHINE- GUN.

APPLlcATloN FILED Dsc.11.-191a.

1. F. OMALLEY.

MACHINE GUN.

APPLICATIQN FILED DEC. 11.41918.

Patented Feb. 3, 1920.

2 SHEETS--SHEET 2.

A TTOR/VEYS which similar c JOHN vFRANCIS OMALLEY, 0F MOUNT VERNON, NEW YORK.

MACHINE-GUN.

Specification of Letters Patent.

Patented Feb. A3, 1920.

Application tiled December 11, 1918. Serial No. 266,194.

To all whom t may concern.'

Be it known that I, JOHN FRANCIS OMALLEY, a subject of the King of Great Britain, having declared my intention to become a citizen of the Unitedv States, and

a resident of Mount Vernon, in the county of Westchester 'and State of New York, have invented a new and Improved Machine-Gun, of which the following is a full, clear, and exact description. l

' The invention relates to machine guns such as shown and described in the application for Letters Patent of the United States, Serial No. 181,024, filed by me on July -17, 1,917.

The object of the present invention is to provide a new and improved machine gun arranged to permit the use of interchange- Yable gun barrels, of which one is water cooled, another is double, reversible and air cooled, and the third is a single air cooled barrel. Another object is to 'provide a perfect balance in the rotating cartridge wheel and to permit operating the crank shaft from one side of the gun instead of from underneath, as disclosed in my previous apy plication above referred to.

With thse and other objects' in view, the invention consists of certain novel .features of construction, as hereinafter shown and 'described and then specifically pointed out inthe claims.

Apractical embodiment of the invention is represented in the accompanyingdrawings forming a part of this specification, 1n

aracters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the machine gun provided with a water cooled barrel;

Fig. 2 is a plan view of the same;

Fig. 3 is an enlarged cross section of the same on the line 3-3 of Fig. 5;

Fig. 4 is a similar view of the same on the line 4 4 of Fig. 5;

Fig. 5 is an enlarged longitudinal central section of themachine gun;

Fig. 6 is a side elevation of the machin gun provided with -reverslble and water cooled barrels; Y I

F ig. ,7 is a similar view of the machine gun provided with a single air-cooled bar- I rel: and v Fig. 8 is a side elevation of one of the barrels shown in Fig. 6. The gun body or main frame 10 'of the machine gun is preferably made in two parts 11 and 12 fastened together by transverse screws 13, and the said parts 11 and 12 are provided with transversely extending interlocking tongues and grooves, one fitting into the other to securely hold the parts against longitudinal movement one on the other, as will be readily understood by reference to Fig. 2. The forward end of the part 12 of the gun body 10 is provided with a recess 20 and with a forwardly extending spindle 21 adapted to support either a single water jacketed barrel 22 or two reversible barrels 23, 24 (see Fig-6) provided with trans?.

versely extending air cooled ribs 25, 26 for keeping the barrels cooled by the action of the surrounding air. The barrel 23 may be separately mounted on the spindle 21, as shown in Fig. 7. The barrel 22 is provided with bearings 30 and 31, of which the rear bearing 30 and the'rear end 32 of the barrel t into the recess-20, and the said bearings 30 and 31 engage the spindle 21. A screw 33 screws into the part 11 of the gun body y10 against the bearing 30'to securely hold the barrel-22 in position on the gun body.

The forward end of the spindle 21 is vprovided with a nut 34 and a spring 35 is coiled on the spindle and interposed between the said nut 34 andthe bearing 31. The nut 34 andthe spring 35 can be readily removed whenever it is desired to interchange the barrel 22 with the other barrels 23, 24. The barrel 23 is provided with spaced bearings 40, 41, and a bearing 42 is formed on the barrel 24 and lits between the bearings 40 and 41. The rear end of the bearing 40 is adapted to pass into the recess 20 the same as the bearing 30 and is .adapted to be fastened therein by the set screw 33. The bearings 40, 41 and 42 engage the spindle 21 and the spring 35 is in this case interposed between the bearing 41 and the nut 34, as plainly shown in Fig. 6 and 7. By reference to Fig. 7 it will be noticed that the barrel 24 can be omitted but when in conjunction with the barrel 23 its rear end lits into the` recess 20, and when itis desired to reverse the barrels 23 and 24, that is, to move the barrel 23 out of operativeV position relative to the gun body and to move the barrel 24 into operative position relative tothe said gun body, then it is only necessary for the operator to slide the two barrels 23 and 24 outwardly until the inner ends of the barrels disengage the recess 20 to allow the operator to turn the barrels on the spindle Vat p naled in suitable bearings 68 attached to the 21 until the barrel 24 is uppermost and the barrel 23 is lowermost. On the operator now 'releasing the barrels, the spring 35 causes the rear ends of the barrels to rengage the recess 20.- The barrels are next fastened in place by screwing up the set screw 33, which is temporarily unscrewed during the reversing operation as above mentioned.

The gun body 10 is provided with a cartrid e wheel chamber 50 having openings 51 e sides for the passage in a.transverse directionof the cartridge belt 52 carrying the cartridges 53 adapted to move successively -into ring position relative to the bore 54 formed in the gun body 10 and in register with the bore of the barrel 22, 23 or 24 in use at the time, as above explained. Thev cartridge vbelt 52 and the cartridges 53 engage a cartridge wheel 60 arranged within the chamber 50 and provided with a shaft 61 journaled insuitable bearings formed in the gun body 10. On the shaft 61 is secured a gear wheel 62 in mesh with a gear wheel 63 secured on a longitudinally extending shaft 64 journaled in the gun body 10, as plainly indicated in Fig'. 5. The rear end` of the shaft 64 passes out ofthe gun body and passes along the under side thereof and on this rear end is secured a bevel gear wheel 65 in mesh with a bevel gear wheel 66 secured on a transversely extending shaft 67 jourunder side of the gun body 10, as plainly shown in Fig. 3. A crank arm 69 is attached to the right hand side of the shaft 67 to permit the user of the gun to conveniently turn the shaft 67 with a view to rotate the shaft p 64 which bythe gear wheels 63, 62 rotates the )shaft 61 and consequently the cartridge wheel 60 to feed the cartridge belt 52 throu h the chamber 50 for the purpose above escribed.

In order to re the cartridges 53 as they successively move into operative position in the gun body 10, use is made of Ia firing pin 70 sliding in the gun body and attached to the forward end ofa hammer 71 pressed in a forward direction by a spring 72 as plainly shown in Fig. 5. The hammer 71 is provided at its forward end with a tooth 73 engaged successively by teeth 74 of a cam wheel 75 rotating with' the cartridge wheel 60. Thus when the cartridge wheel is turned, the cam wheel 75 pushes the hammer 71 rearwardly against; the tension of the spring 72, and then the cam wheel releases the hammer 71 and allows the same to mve forward by the action of its spring 72 to re the cartridges 53 moved into operative position during the turning ofv the cartrid e wheel 60. This mechanism is practically the same as the one described in the application above referred to so that further detailed description of the same is not deemed necessary. The forward end of the gun (see Figs. 1 and 4),

4'and another of the said barrels vided with a water jacket for the circu ation vbody 10 is attached to the rear end 80 of a lever 81 by the use of a transverse pin 82 and the said lever 81 is' pivoted at 82 on a post 83 having a depending pivot 84 journaled in a support 85 preferably in the form of a tripod having legs 86. VThe rear end of the lever 81 is pivotall connected with a screw rod 90 on Whic screws a nut 91 mounted to turn in a bearing 92 forming part of the post 83. By turning the nut 91, the screw rod 90 is moved u 0r down according to the direction in w ich the nut is turned, and this movement -ven to the screw rod 90 causes an up or own swinging movement of the lever 81 to elevate or depress the gun body and with it the barrel mounted thereon. It will be noticed that by the arrangement described the gun body and its barrel can be minutely adjusted to insure accurate shooting andthe gun body and its barrel may be readily swung to one side or the other according to the direction in which the shot is to be fired.

The gun body l0 and the barrels are provided with suitable rear and front sights 100 and 101 of any approved construction.

Having thus described my invention, I claim as new anddesire to secure by Letters Patent .1. In a. machine gun, a gun body provided at its forward end with a recess, a Spindle extending forwardly from the said recessed end of the gun body, and a plurality of barrels arranged for interchangeable engagement with the said spindle and the said recess to hold the gun barrel in operative relation to the gun body, the said barrels havin means for cooling the same, one of the sai barrels having vmeans for coolinv itby-air ein proof'water to cool the barrel. l

2. In a machine gun, la gun body provided at its forward end with a recess and 4with a 'forwardly extending spindle, a barrel having spaced bearin s engaging the said spindle,and a `secon barrel having a bearin fitting between the said spaced bearings `and engaging the said spindle,the rearrends of 115 the said barrels'engaging the vsaid recess.

.3. In a machine gun, a gun body provided at'its' forward end with a recess and with a forwardly extending spindle, a barrel having spaced bearings engaging the said spindle, a barrel having a bearmg fitting between the said-spaced bearings and engaging the said spindle, the rear ends of the said bar- -rels engaging the said recess, a cap on'the forward end of the said spindle. and a sprin coiled on the said spindle .and arrange intermediate the said cap and the forward one' of the said bearings.

4. In a machine'gun, a gun body provided at its forward end with a recess and with a forwardly extending spindle, a barrel having spaced bearings engaging the said spindie, a second barrel having a bearing fitting between the said spaced bearings and engaging the said spindle, the rear ends of the said barrels engaging the said recess, a cap on the forward end of the said spindle, a spring` coiled on the said spindle and arranged intermediate the said cap andI the

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