US1962946A - Air gun - Google Patents

Description

M. ANDREWS June 12, 1934.

AIR GUN Filed July 1932 2 Sheets-Sheet 1 M. ANDREWS June 12, 1934.

AIR GUN Filed July 8, 1952 2 Sheets-Sheet 2 0 O M m 2 DE R W e v 3 r a m 0 A w 0E 2 m ow m a i H f P w 6 mo M I I I I l l I I I l l I l I I l I l I 1 II a \H |I| m E E E E E E E E E E E E E E E a: E 5 =7 WM I l. l I l I l l I II on l l I I l I l I I 1, m \R A a x Ms. K x a a .m a m N oE E R i 2 m a n 6 Wm R R T R R 8 an I w M z w 5v 0 i .wi NM N w s. .9 1 I .1 ll 3 mm mm X on mm m5 N No mm Patented June 12, 1934 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to guns, more particularly to guns of the type known as air rifles, and it consists in the combinations, constructions, and arrangements herein shown and described.

An object of my invention is to provide an air gun having an improved leverage system which will enable an operator to compress the spring which places the fluid under pressure in an easy and efficient manner.

A further object of my invention is to provide a leverage system as set forth above which will be accommodated in the usual portions of the gun when the same is inoperative, to preserve in said gun the appearance of a rifle of conventional construction.

Athird object of my invention is to provide a device of the type described the loading cham-- ber of which consists of a minimum number of parts, capable of accomplishing the loading operation with a minimum number of operations.

A fourth object of my invention is to provide a device of the type described the parts of which may be readily taken down by an inexperienced person for cleaning, replacement, etc.

A still further object of my invention is to provide a device of the type described which will not get out of order easily and is simple to manufacture.

Other objects and advantages will appear as V I the specification proceeds and the device will be more particularly defined in the appended claim.

My invention is illustrated in the accompanying drawings forming a part of this application, in which Figure 1 is a longitudinal sectional view of the device with parts thereof shown in elevation for clearness of illustration,

Figure 2 is an elevational view with the mechanism in one operative position with parts thereof shown in section for clearness of illustration,

Figure 3 is a fragmentary detail view of a portion of the device with the mechanism shown in another operative position,

Figure 4 is a fragmentary detail view of another portion of the device,

Figure 5 is a detail view of a portion of the device,

Figure 6 is a fragmentary detail sectional view of a portion of the device with parts thereof shown in elevation for clearness of illustration,

Figure 7 is a bottom plan view of that portion of the device shown in Figure 6,

Figure 8 is a detail view,

Figure 9 is a sectional view on line 99 of Figure 6, and

Figure 10 is a fragmentary detail view of a portion of the device.

In carrying out my invention I make use of a gun stock 1 which may be of ordinary construction, except that the same is modified slightly to accommodate itself to my invention. This modification consists of a slotted portion 2 in the lower edge of said stock, shown most clearly in Figure 2. This stock mounts the metal portions of my gun by means of the fastener 3 and the barrel mounting portions 4. Any other suitable form of fastening means may be utilized if desired.

The body portion of my rifle comprises a framework 5, having the portion 6 for engagement with the stock and the portion '7 for mounting the barrel and operating portions of my invention.

The portion 7 comprises a pair of bosses 8 and 9 extending parallel to one another for mounting the barrel and the operating parts respectively, and a downwardly extending lug 10 for securing certain parts of the operating mechanism.

The boss 8 is bored as shown at 11 in Figure 1, the bore communicating with a channel 12 in the portion 7, this channel 12 communicating with a bore 13 in boss 9, all for a purpose soon to be described.

The barrel casing 14 is mounted about this boss portion 8. This barrel casing has an opening 15 therein notched as at 15a in which the loading operation is accomplished, as will be later described.

Slidable within the barrel casing 14 is the barrel 16 having a handle 1'? thereon for oscillation and reciprocation of the same by an operator.

A pin 18 projects through the bore 11 to engage within the bore 19 of the barrel 16 for reasons that will be made apparent further on in the specification. This pin is secured in themember 7 by means of the threaded body portion 20 integral therewith.

A washer 21 positioned on the extremity of the boss 8 assures sealing relationship of the barrel and said boss when the same are brought into close abutting engagement.

The air compressing means for discharging the pellet through the barrel is secured to boss 9. This means comprises a tubular member 2111 mounted on said boss and secured to the barrel casing 14 by the means shown at 22, or by any other suitable means as desired. The tubular member has a slot 23 extending throughout a portion of the lower part thereof, this slot having an enlarged portion 24 at its outer extremity.

For compressing the air within said tube to eject the pellet, a piston member 25 having the sealing head 26 thereon is provided. This piston is slotted as shown at 2'7 similarly to the tubular member. It supports within its hollow interior a plunger 28 secured at one end to the piston as shown: at 29, and having its other extremity notched as shown at 30. This plunger is surrounded by a compression coil spring 31 adapted to abut the inner end wall of the piston as shown at 32. The opposite end of the spring abuts a wall 33 formed in the end portion 34 of the tube, the wall 33 being bored as shown at 35 to accommodate passage of the plunger therethrough.

The end portion 34 of the tube consists of the cylindrically formed casing part 36 threaded to the body portion of the tube as shown at 3'7. It is open ended as shown at 38 and recessed at one or more points as indicated at 39 for interfitting relationship with a cap member 40. This cap member 40 is secured to the part 34 by the bolt 41 projecting through the inwardly extending shoulder 42 of the casing part. The cap member is retained against rotational movement by the tongue 43 which projects into the recessed portion 39.

This cap 40 is adapted to support the sear or latch member 44 of my gun by means of the lug or finger 45 projecting into. the casing part and pivotally mounting said sear.

The sear may be of any suitable construction but is shown in this embodiment as consisting of a bell crank lever 46 having a shoulder 47 thereon for interfitting relationship with 'the notched part 30 of the plunger. This shoulder is normally urged to the operative position by the re silient means 48 operating between the shoulder bearing arm of the bell crank lever and the side wall of the casing part 36, as most clearly shown in Figure 6. The opposite end of the sear is connected to the trigger 49 of my gun by a link 50.

This trigger 49 is of usual construction, being pivotally mounted to a fixed portion of the device.

For carrying the piston 25 backwardly against the pressure exerted by the spring 31, I use a cocking shoe or-slide 51 having'an abutment portion 52 for engagement with the portion 53 forming the end of the slot in the piston, a guide portion 54 for snug engagement with the side walls of the slot 23 of the tube, and an enlarged portion 55 for maintaining the shoe in proper relationship to said slot. This cocking shoe is operated back-i Wardly and forwardly by my improved lever system.

This lever system comprises a' link 56 pivotally mounted to the portion 10 as indicated at 57. This'link 56 swivels at its outer extremity 58 a hand lever59, which hand lever 59 is connected to the cooking shoe by the link 61, the connection being accomplished at point 62 on said lever. This lever 59 is provided with shoulders 60 and 60a designed to abut the shoulder 60b of the link 56 to carryout a specific function during operation'of the system. The link 61 is slotted as shown at 63 to accommodate the trigger, the slotted portion being provided with the usual trigger guard.

. From the foregoing description the use and operation of my device is easily understood. When the operator desires to discharge a pellet, he rotates thelug 1'7 and moves the barrel 16 to the outward position shown in Figure 1. He then inserts the pellet shown at 64 in the bore of the barrel, rotates the lug in a direction opposite to that of the former movement and draws the barrel backwardly until the same is brought into sealing relationship with the washer 21. This movement of the barrel, of course, forces the pellet into the bore thereof due to the projection of pin 11 within said barrel when the same is brought into this position. J

The operator then seizes the lever 59 and actuates the same forwardly from the position shown in Figure 1 to the position shown in Figure 2. During this movement when the lever is in the position shown in Figure 10, the shoulder 60 abuts the. shoulder 60b of link 56. This movement of the lever carries the piston forwardly against the pressure of the spring 31 until the plunger engages the sear 44 as will be clear from an examination of Figures 2 and 4. I

The operator has then only to pullthe trigger to fire the pellet, this operation moving the sear to releasing position to free the plunger, which allows the piston to move-rearwardly under the pressure of the spring to force the air through the channels and into the bore of the barrel, to expel the pellet. The device isthen ready for repetition of the operation. I

When the operator is carrying the gun, the lever 59 can be pressed within the groove 2 to conceal the same, so that the gun will take on the appearance of a rifle of ordinary construction.

Wear will be prevented on the stock of the gun by use of the screw 64a on the stock for abutting relationship with the link 56.

The gun may be easily taken down for cleaning and replacement of parts by simply removing the lug 17 from the barrel 16 and slidingthe same from the barrel casing, while the piston and associated parts may be easily removed by-taking the parts 34 and 40 from the tube by removal of the bolt 41 and unscrewing the-part 34. The cocking shoe 51 may of course be removed through the enlargements in the slots 23 and 27.

It is thus seen that my new linkage system will enable the compression of a spring of the rifle with an easy motion by the operator. j

It is further seen that I have provided an air rifle in which the parts may be so concealedthat the rifle will take on the appearance or a-gun of conventional construction.

It is finally seen that I have provided a device of the type described which has few parts and in which said parts may be readily taken down for cleaning and replacement.

I claim: 1 y

In an air gun, a barrel for the reception of a pellet, a conduit communicating with said barrel, a slotted cylinder communicating with'saidconduit, a piston in said cylinder means for normally urging said piston to-the fluid compressed position, means for retaining said piston against the force of said urging means, and means for moving said piston into engagement withsaid retaining means, comprising a slide forabutting relationship with said piston, a link'pivoted to said slide, a lever pivoted to said link at a pointintermediate the ends of said lever,"and a" link pivotally mounting one extremity of said lever to a fixed portion of thegun, said lever and. said latter named link having shoulders for inter-engagement to control movements of said members,

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