US2101198A - Air gun - Google Patents

Description

Dec. 7, 1937. w. c. ROBINSON AIR GN 2 Sheets-Sheet l Filed June 12, 1936 INVENTOR. W. C. FOB/NSO/V x ATTOR EY.

Dec. 7, 1937. w. c. ROBINSON AIR GUN Filed June l2, 1936 illlllllllillllIrlirllllflllflllt QTL R. v.U AON \E mw N E o WW, n 1 A m hm W ...wm 1X Y B N s Patented Dec. 47, 1937 UNITED vSTATES PATENT ori-ics 12 Claims.

This invention relates to air guns.

The general object of the invention is to provide an improved air gun which is capable of shooting hard and accurately and which is of such a nature that it will not get out of order readily. v

Another object of the invention is to provide a novel shot magazine and deliverydevice for an a1r gun.

an air gun having novel means for advancing a bullet to discharge position.

A further object of the invention is to provide a novel trigger release for an air gun.

Another object of the invention is to provide a novel pump means for the storage-reservoir of a repeating air gun.

Another object of the invention is to provide an improved air gun wherein a plurality of pellets 20 can be expelled therefrom merely pulling and releasing the ring trigger.

Another object of the invention is to provide an air gun including means wherebythe action of pulling and releasing the ring trigger ex- 25 pells a pellet from the ring barrel and reloads.

l Other objects and the advantages of the inventi'on will be apparent from the following description taken in connection with the accompanying' drawings, wherein: i

Fig. 1 is a side elevation of an air ri'e embodying the features 'of my invention showing the rifle mounted on a tripod;

Fig. 2 is a front elevation of the air rifle;

Fig. 3 is a section taken online 3-3 of Fig. 2; 35 Fig. 4 is a section taken on line 4-4 of Fig. 3; Fig. 5 is a'section taken on line 5-5 of Fig. 3; Fig. 6 is a section taken on line 6-6 of Fig. 3; Fig. '7. is a section taken on line 'l-'I of Fig. 3; Fig. 8 is a section taken on line 8 8 of Fig. 4; 40 Fig. 9 is a section taken on line 9--9 of Fig. 8; Fig. 10 is a section taken on line III- I0 of Fig. 4;

Fig. 11 is a section taken on line II-II Fig. 1; l

Fig. l2 is a view similar to Fig. 10 showing the parts in a fired position; i

Fig. 13 i-s a section taken on line I3I3 of Fig.

3; and

Fig. 14 is a fragmentary section taken on line 50 I4-I4 of Fig. 13.

Referring to the drawings by reference character have shown my invention as embodied in an air gun which is indicated generally at I0.

As shown the air gun includes a'stock II and a` 55 barrel I2. "Ihe stock includes a grip portion II' Another object of the invention is'to provide which is shown as of the pistol grip type and has a central chamber I3 and upper and lower forwardly projecting portions I4 and I5.

The portion I5 is mounted upon the under side of an air reservoir 'I6 which is connected to the barrel I2 as by soldering and is preferably cylindrical and includes a front wall I1, a rear wall I8 and which has a lower aperture I3 therein in which I mount a closure 20.

The closure is cup-shaped in cross section and has a cylinder 2| fitted therein which communicates through an aperture 22 with the interior of the reservoir I6. lThe aperture 22 is normally closed by a valve 23 which is urged to its seat by a spring 24. Within the cylinder 2I I show a piston 25 which has a piston rod 26 secured thereto and which is connected by a link 21 with an operating member 28 which is pivoted as at 29to the side wall of the closure 20. The construction is such that when the lever 28 is moved back and forth the pump will operate to charge the reservoir I6. When not in use the lever 28 is moved within the lower portion of the closure 20 and is secured in place as by a clip 30, as clearly shown by the broken lines in Fig. 3.

The rear end I8 of the reservoir is provided with an innating valve 3I which may be a tire valve and with a gauge 32 which indicates the pressure within the reservoir.

The upper portion I4 of the stock includes a part 33 which engages the top of the reservoir and includes a depending portion '34 which engages the rear member I8 of the reservoir. Between the portion 34 and the grip Il the stock includes acut away portion 35. Adjacent the top thereof the stock II has a threaded 4aperture 36 therein (see Fig. 8) one end of which opens into the cut away portion 35 and the opposite endinto the chamber I3. At the opposite side of the chamber I3 the stock has a recess 36 therein which opens into the chamber I3 and includes a valve seat portion 36". the recess 36 the stock has a reduced recess 36a therein.

Furthermore, adjacent the top the stock II hasa conduit 31 therein, one end of. which opens Opening into into the recess 36 and the opposite end comwhich opens into the cut away portion 35 and the opposite end into the chamber 38. Fixed in the aperture 39 and suitably secured to the stock I provide a tube 4Ilwhich extends into the cut away portion 35 a predetermined distance. Positioned in the threaded aperture 36 I provide a threaded valve plug 4| which has a recess 42 therein which opens into the chamber I3 and' has a plurality of radial apertures 43 therein which at one end open into the recess 42 and at the opposite end open into the chamber 38. Furthermore, the plug 4I has a reduced aperture 44 therein which is concentric with the recess 42.

'I'he inner end of the plug is concave to form a valve seat 45. Positioned in the aperture 44 of the plug 4I I provide a stem 46 which at one end extends a predetermined distance into the cut away 35 and the opposite end is positioned in the aperture 36a. Positioned in the aperture 36a between the end thereof and the end of the stem 46 I provide a coiled spring 41. Intermediate the length thereof the stem 46 has a valve member 48 thereon which includes opposed frustoconical valve faces 48 and 50. Normally the spring 41 retains the valve face 48 in engagement with the valve seat 45 of the plug 4I to restrif't passageway from the chamber I3 into the plug recess 42.

The barrel I2 includes an outer cylindrical member 5| which projects beyond the front I1 of the reservoir and the top portion of which projects beyond the rear portion I8 of the reservoir and is fitted within an arcuate groove 52 in the stock II as shown in Fig. 8. The lower portion of the barrel I2 terminates at 53 (see Fig. 3) abutting the stock portion 33. Within the barrel I2 I mount a rifle barrel 54 having a bore 55 therein. The outer end of the barrel 54 terminates a short iistance from the outer end of the barrel 5| and the inner end terminates at 56 at a location spaced from the stock II.

Secured to the rifle barrel 54 I provide a magazine tube 51. Adjacent the forward end of the barrel 5I the rifle barrel 54 and the magazine tube 51 are slidably supported in a bearing plug 58 in the barrel 5| and adjacent the opposite end are similarly supported in the portion 33 of the stock II. Intermediate the stock portion 33 and the plug 58 the rie barrel 54 and the magazinetube 51 are slidably supported in a plug member 58.

Adjacent the rear end 56 the rifle barrel 54 has a depending trigger member 66 secured thereto. Forward of the rear end 56 the rifle barrel 54 has an aperture'6l (Figs. 10 and 12) therein and the magazine tube 51 has a similarly aligned aperture 62 therein. Opposite the aperture 6| a slight depression 61|. is provided in the surface of the bore 55 to hold the pellet 65 in the bore 55 in position until the gun is red.. The rear end of the magazine tube 51 is closed by a plug'63 having an arcuate front face 64 which curves towards the rear side of the aperture 62 to guide pellets 65 through the apertures 6I and 62. The forward end of the magazine tube 51 is closed by a plug 66 (see Fig. 12) and positioned in the magazine tube I provide a follower 61.

In the magazine tube 51 between the plug 66 and the follower 61 I provide a coiled spring 68 which urges the follower 61 rearward to force the pellets 65 towards and through the apertures 6I and 62. The follower 61 has a finger portion 61 thereon which projects out of the magazine tbe 51 through a slot 51' and through the barrel 5I through a slot 5|' (see Figs. 1 and 11).

Suitably anchored to the plug 58 I provide a coiled spring 69 which at the opposite end is secured as at 10 to the magazine tube plug 66. 'Ihe spring 68 normally urges the rifle barrel 54 and the magazine ,tube 51 forward until a stop portion 1I on the trigger member 60 engages the rear of the stock portion 33.

The tube 46 i's positioned in the bore 55 of the rifle barrel 54 and when the rie barrel 54 is fully forward the forward end of the tube 46 is positioned in line with the rear of the barrel aperture 6I as clearly shown in Fig. 10.

The space in the barrel 5| between the plug 58 and the plug 58 is adapted to be used to store a quantity of the pellets 65. To insert the pellets into the barrel 5| the barrel 5| has an elongated slot 12 therein which is closed by a slice member 13 (see Figs. 3 and 6).

The forward face of the plug 58 has a conical recess 14 therein (see Fig. 14) which adjacent the magazine tube 51 has a reduced forwardly projecting boss 15 therein. The boss 15 has a recess 16 therein the size of a pellet 65 and the outer end of the boss is knife-edged coincident with the side walls of the recess 16. Adjacent the bottom of the recess 16 the magazine tube 51 has an aperture 18 therein` through which the pellets 65 are adapted to pass into the interior thereof.

Between the forward end of the reservoir I6 and the pump I provide a collar member 18 whichv encompasses the reservoir [6 and the barrel 5|v and has a depending grip portion thereon which has a recess 8| therein.

As shown in Figs. 1 andZ a tripod 82 including a hub portion 83 having an upstanding reduced spindle 84 thereon may be provided to support the gun I8 when desired. The spindle 84 may be pivotally secured to the hub 83 as indicated at 85. The spindle 84 is positioned in the aperture 8| of the gun grip 80 and when the gun is thus supported it may be swung about the spindle 84 and may be tilted on the spindle pivot 85.

In operation the slide member 13 is moved to expose the slot 12 in the barrel 5| and a quantity of the pellets 65 are put into the barrel 5| through the slot 12 and thereafter the slide member 13 is moved to close the slot 12. The gun I Il is then held vertical with the front end up and the follower 61 is moved against the action of the spring 68 by the finger 614 to a position wherein it is above the aperture 18 of the magazine tube 51 as shown in Fig. 14. When the gun is held in this position the pellets 65 roll into the conical recess 14 of the `plug 58 and into the recess 16 and thence through 'the aperture 18 of the magazine tube into the interior of the magazine tube.

The knifefedgev11of the boss 15 separates the pellets 65 and allows only one at a time to enter the recess 16 thereby preventing jamming. After a quantity of pellets 65 are in the magazine tube the follower 61 is released whereupon the spring 68 urges the follower and the pellets 65 in the magazine tube 51 towards the apertures 6I and 62 and forces one of the pellets through the apertures 6| and 62 into the bore 55 of the rifle barrel 54 as shown in Fig. 10. The clip 3|) is then released and the operator actuates the pump handle 28 to charge the reservoir I6 with compressed air.

When the compressed air in the reservoir ,is at a suitable pressure the operator swings the pump handle into the casing 20 and moves the clip 30 to retain it therein. Instead of pumping air into the reservoir I6 compressed air may be introduced through the tire valve 3l from ay suitable source of compressed air. When the reservoir I6 is charged compressed air flows therefrom.

through the aperture 31', the conduit 31, and the recess 36' into the chamber i3. The gun i0 is nowk ready to beflred.

To iire the gun I0 the trigger is quickly pulled rearwardly. When the trigger 60 is pulled rearwardly the rifle barrel 54 moves with it. By the time the trigger 50 engages the end of the stem i6 the yriiie barrel 51 has moved a suilicient .distance so that the tube Mi closes the aperture 6I in the magazine barrel and as the trigger continues to move rearwardly it moves the stem t6 rearwardly. As the stem H6 is moved rearwardly the valve member i8 moves therewith moving the valve face i9 out of engagement with the valve seat of the valve plug Ml and upon continued rearward movement of the stem d6 the valve face engages the valve seat portion 36" surrounding the recess 36 thereby restricting the passage of compressed air into the chamber i3 through the recess 36'. Asc the valve face t9 moves out of engagement with the valve seat .155 the compressed air in the chamber i3 passes therefrom through the valve plug recess d2 and apertures Minto the chamber 38 and thence through the tube l0 and forces the pellet 65 forward in the Arifle barrel bore and expeils it from the barrel.

When the trigger 50 is released the spring 59 moves the rifle barrel 5t forward to its normal position and the spring 68 forces another of the pellets through the apertures 5l and 62 into the bore 55 of the rifle barrel 54. Furthermore, when the trigger is released the spring 36a forces the stem d5 forward thereby moving the valve face 55 out of engagement with the valve seat '35" and the valve face i9 into engagement with the valve seat 45. When the valve face 50 moves out; of engagement with the valve seat 35 compressed air again ows from the reservoir l5 through the aperture 3l', the conduit 31, and the recess 35 into the chamber i3.

Thus it will be seen that when a sumcient quantity of compressed air is in the reservoir i5 all the pellets 65 in the magazine tube 51 may be fired one after the other by the one operation of repeatedly pulling and releasing the trigger 50.

From the foregoing description it will be apparent that I have invented a novel air gun which may be economically manufactured and which is highly eicient in use.

Having thus described my invention'l claim: 1. An air gun including a stock, an air reservoirand an outer barrel secured to said stock,

-said stock having a chamber therein,'means to admit a charge of air into the chamber, means to discharge a charge of air from the chamber, a tube member mounted on said stock and projecting forwardly therefrom, said stock having conduit means therein at one end communicating with said tube and at the opposite end communicating with said chamber, a rifle barrel slidably mounted on said tube member. a magazine tube -in said rifle barrel, said rifle barrel having a loading aperture communicating with y said magazine tube.

communicating with said chamber, a rifle barrel slidably mounted in said outer barrel, said tube member being disposed in said riile barrel.

3.-An air gun including a stock, an air reservoir secured to said stock, an outer barrel portion mounted on and secured to said reservoir and said stock, means on said reservoir to force air thereinto under pressure, said stock having a chamber'therein, said stock having a pair of opposed recesses opening into said chamber, a valve seat surrounding each recess, said stock having conduit means therein communicating at one end with the'interior of said reservoir and at the opposite end opening into the rear one of said recesses, a stern member slidably mounted in said stock' coaxial with said recesses, a valve member on said stem adapted to control passage through each of said recesses, said stem projecting forwardly of said stock, a tube member mounted on said stock and projecting forwardly, said stock having conduit means therein at one end communicating with said tube and.

at the opposite end opening into said front recess, a rifle barrel slidably mounted in said outer barrel, a magazine tube positioned in said outer barrel, said rifle barrel and said magazine tube being secured together, said rifle barrel having a loading aperture communicating with said magazine tube. said tube member being disposed in said rie barrel.

4. An air gun including a stock, an air reservoir secured and an outer barrel secured to said stock, said stock having a chamber therein, said stock having a pair of opposed recesses opening into said chamber, a valve seat surrounding said recesses, said stock having conduit means therein communicating at one end with the `interior /of said reservoir and at the opposite end opened to engage said valve seat of said front recess' and a rear valve face adapted to engage said valve seat of said rear recess, said stem project- Y ing out of said stock into said cut away'portion, a vtube member mounted on said stock and projecting` into said cut away portion, said stock ,having conduit means therein at one end communicating with said tube and at the opposite end opening into said front recess, a rifle barrel slidably 'mounted vin said outer bar l. a magazine tube in said rifle barrel, sai rifle barrel having a loading aperture communicating with said magazine tube. i

5. An air gun including a stock, an air reservoir secured to said stock, an outer barrel portion mounted on and secured to said reservoir and said stock, means on said reservoir to force air thereinto under pressure, said stock having a chamber therein, saidstock having a pair of opposed recesses opening into said chamber, a valve seat surrounding each recess, .said stock having conduitl means therein communicating at yone end with the interior of said reservoir and 'l at the opposite end opening into the rear one ofy said recesses, said stock havingran open. bottomed cut away portiontherein between said grip portion and said reservoir, a stem member slidably mounted in said stock coaxial with said recesses, a valve member on said stem and disposed in said chamber, said valve member including a front valve face adapted to engage said valve seat of said front recess and a rear valve face adapted to engage said valve seat of said rear recess, said stem projecting out of said stock into said cut away portion, a tube member mounted on said stock and projecting into said cut away portion, said stock having conduit means therein at one end communicating with said tube and at the opposite end opening into said front recess, a rifle barrel slidably mounted in said outer barrel, amagazine tube positioned in said outer barrel, said rie barrel and said magazine tube being secured together, said riiie barrel having a loading aperture communicating with said magazine tube, said tube member being disposed in said rifle barrel.

6. An air gun including a stock, an air reservoir secured to said stock, an outer barrel portion mounted on and secured to said reservoir and said stock, means on said reservoir to force air thereinto under pressure, said stock having a chamber therein, said stock having a pair of opposed recesses opening into said chamber, a valve seat surrounding each of said recesses, said stock having conduit means therein communicating at one end with the interior of said reservoir and at the opposite end opening into the rear one of said recesses, said stock having an open bottomed cut away portion therein between said grip portion and said reservoir, a stem member slidably mounted in said stock and coaxial with said recesses, a valve member on said stem and disposed in said chamber, said valve member including a front valve face adapted to engage the valve seat of said front recess and a rear valve face adapted to engage the valve seat of said rear recess, resilient means normally urging said front valve face into engagement with its associated valve seat, said stem projecting out of said stock into said cut away portion, a tube member mounted on said stock and projecting into said cut away portion, said stock having conduit means therein at one end communicating with said tube and at the opposite end opening into said front recess, a rifle barre slidably mounted in said outer barrelja magazine tube positioned in said outer barrel, said riflebarrel and said magazine tube being secured together, said rifle barrel having a loading aperture communicating with said magazine tube, said tube being disposed in said rifle barrel and said loading aperture being exposed when the barrel is in its. forward position.

7. An air gun, said air gun including an outerl barrel, a tube at the. rear end of said outer bard rel, means to supply compressed air to said tube, a trigger for controlling said means, a riie barrel positioned in said outer barrel, a magazine tube positioned in said outer barrel, said rie barrel and said magazine tube being slidably mounted and secured together, said riiie barrel having an aperture adjacent the rear thereof and an aligning aperture in said magazine tube, a follower member in said magazine tube, the ends of said magazine tube being closed, said rear closure of said magazine tube being shaped to direct pellets through said riiie barrel and tube apertures, said first tube being positioned in said rie barrel with the forward end:- thereof "aligned `with the rear edge of said aperture in said rifle barrel, a plug in said outer barrel having a. conical recess in its forward face and said magazine barrel having an aperture therein adjacent the bottom of said conical recess and a boss extending from the surface of said conical recess, said boss having a recess therein into which said second magazine tube aperture opens.

8. An air gun, said air gun including an outer barrel, a, tube at the rear end of said outer barrel, means to supply compressed air to said tube, a trigger for controlling said means, a rifle barrel positioned in said outer barrel, a magazine tube positioned in said outer barrel, said riiie barrel and said magazine tube being slidably mounted and secured together, said rie barrel having an aperture adjacent the rear thereof and an aligning aperture in said magazine tube, a follower member in said magazine tube, the ends of said magazine tube being closed, said rear closure of said magazinetube being shaped to direct pellets through said rifle barrel and tube apertures, said first tube being positioned in said rifle barrel with the forward end thereof aligned with the rear edge of said aperture in said rie barrel, a plug in said outer barrel having a conical recess in the forward face thereof and said magazine barrel having an aperture therein adjacent the bottom of said conical recess, a boss extending from the surface of said conical recess, said boss having a recess therein into which said second magazine tube aperture opens, the outer side walls of said boss being tapered to forma knife edge coincident with the surface of said boss recess.

9. An air gun including an outer barrel, a tube at the rear end of said outer barrel, means to supplycompressed air to said tube, a trigger for controlling said means, a rie barrel positioned in said outer barrel, a magazine tube positioned in said outer barrel, said rifle barrel and said magazine tube being secured together, a closure member in said outer barrel adjacent the forward end thereof and a plug in said outer barrel intermediate theiength thereof, said rie barrel being slidably mounted in said closure member and said rifle barrel and said magazine tube being slidably mounted in said plug, said riiie barrel having an aperture adjacent the rear thereof and an aligning aperture in said magazine tube, a follower member in said magazine tube, the ends of said magazine tube being closed, said rear closure of said magazine tube being shaped to direct pellets through said rifle barrel i and tube apertures, means normally urging said follower towards said rifle barrel and magazine apertures, means normally urging said riiie barrel and said magazine tube forward, said rst tube being positioned in Said rie barrel with the forward end thereof aligned with the rear edge of said aperture in said rifle barrel, said plug member having a conical recess in the forward face thereof and said magazine barrel having an aperture therein adjacent the bottom of said conical recess, a boss extending from the surface of said conical recess, said boss having a recess therein into which said second magazine tube` aperture opens, the opter side walls of said boss being tapered to forin a knife edge coincident with the surface of said boss recess.

10. An air gun including a stock, an air reservoir secured and an outer barrel secured to said stock, said stock having a chamber therein, said stock having a pair of opposed recesses opening into said 'chamber` a valve seat surrounding said recesses, `said stockhaving conduit means therein communicating at one end with the interior of said' reservoir and at the opposite end opening axial with said recesses, a valve member on 'said stem and disposed in said chamber, said valve member including a front valve face adapted to engage said valve seat of s/aid front lrecess and a lrearvalve face adapted to engage said valve seat of said rear recess, said stem projecting out of said stock into said cut away portion, a tube member mounted on said stock and projecting into said cut away portion,- said stock having conduit means therein at `one end communicating with said tube and at the opposite end-opening into said front recess',y a rifle barrel slidably mounted in 'said outer barrel, a magazine tube movable in said riiie barrel, said rie barrel having a loading aperture communicating withvsaid magazine tube, said rie barrel having an aperture adjacent therear thereof and an aligning aperture insaid magazine tube, a follower member in said magazine tube, means to direct pellets through said riiie barrel and tube apertures, said first tube being positioned in said rie barrel with the forward end thereof `"aligned with the rear edge of said aperture in said riiie barrel, said magazine barrel having an aperture therein and means to direct pellets into said last mentioned aperture.. 1l. An air gun including a stock, an air reservoir and an outer barrel secured to said stock, said stock having a. chamber and having a pair 'of opposed recesses opening into the chamber, a valve seat surrounding Veach recess, said stock having conduit means therein communicating at one end with theinterior of said reservoir and at the opposite end opening into the rear recess, said stock having an open bottomed cut away portion therein between said grip portion and said reservoir, a stem member slidably mounted in said stock coaxial with said recesses, a valvemember on said stem and disposed in said chamber, saidv valve member including a front and a rear valve face adapted to engage said front valve seat and said rear lvalve seat, said stem project- 'ing out of said stock into said cut away portion, a

tube member mounted .on said stock and pro- Jecting into said cut away portion, said stock having conduit means therein at one end communi.- cating with said tube and at the opposite end opening into said front recess, a rifle barrel slidably mounted in said outer barrel, a magazine tube movable in said rifle barrel, said rifle barrel having a loading aperture communicating with said magazine tube, said rifle barrel having an aperture adjacent the rear thereof and an aligning aperture in said magazine tube, a'follower member in said magazine tube, the rear of said magazine tube having a closure, said closure being shaped to direct pellets through said rifle barrel and tube apertures, said rst tube being positioned in saidf-rie barrel with the forward end thereof aligned with the rear edge of said aperture in said riiie barrel, a plug in saidouter barrclhaving a recess in the forward face thereof and said magazine barrel having an aperture therein adjacent the bottom of said conical recess and a boss extending from the surface of said `conical recess, said boss having a recess therein into which said second magazine tube aperture opens. l y

12. In an air gun including a stock and a ring barrel, a magazine tube containing a. plurality of pellets and communicating with the barrel,

a member xed on said stock and projecting into said barrel and normally preventing communi-L cation between the magazine and barrel, means .to move said barrel relative to the member to open communication between the barrel and the time the trigger is released to cause another pellet to be moved from the magazine tube into said ring barrel.

Y A [WILLIAM C. ROBINSON.

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