US2466513A - Air gun - Google Patents

Description

April 5, 1949. W. A. TRATSCH 2,466,513

AIR GUN Filed Jan. 25, 1945 3 Sheets-Sheet 2 34 NVENTOR.

mf/fg im@ Bil/m im@ April 5, E949. w. A. TRATscH AIR GUN 3 Sheets-Sheet 3 Filed Jan. 25, 1945 Patented Apr. 5, 1949 misc STATES Pei-*ENT o-Feice Walter Tratschi; Ghicagofl'll-, assigner` to Clarence E. Thi'eed'y,ChicagoJllwas trustee 2- Claims.

This invention relates to' new' 'anduseful?v im'- pr'mfenoents` inv air' guns. More 'specifically the invention' relates' to' a novel trigg'er ni'eollani's'in for' controlling passage of air' to' the `ariel offthe' gun to expel the' 'shot'tirerelro'ma TheA invention for its-principal objectthe provision oi an improved construction or this character which' will be highly eiii'cient in use and economical in manufacture.

As a Yfurther and equally important object Cif the invention is the provision 'of mechanism lfiaving maximum speed of operation/whereby t'oproduce the maximu'mpropulsion' speed? to' the'sl'fi'ot from the barrel'.

More' s''pecifl'oailyv in' thisl c'onr'iection;l the ini/en;A tion has for an object the provisionforopeniri'g an air valve to the barrelofI the gun lov-means of hammer action upon' aI plunger; 'thereby prod'ucm'g the maximuin speed of expulsion oi-v the shot from the barrel' o'f the" guna Other objects will appear -liereina'iften The invention consists# iin the novel? combina tion 'and arrangement ol' parts to be' hereinafter described and claim'e'df.

The invention' will be' best' linders'toodY by referen'ce' to' the' accompanying drawings slloiin'g the preferred forni' of constr'u'ctioni,v an'd-invvhicli:

Fig. 1` `is avperspe'ctiv'e View 'ofthe'tri'g'gelmeohl anism embodied in the invention;

Fig. 2 is a perspective 'View 'similar 'to 1 showing* the parts in cockedposition` ready for inipingement upon` the valve'plung'er em'bodie'd in the invention;

Fig'. 3 is a vertical sectionaloetailffview or'- eer; tain parts' of' the trigger mechanism,snovving'the hammer in impinged engagement with the valve plunger embodied the invention;

Fig. 4 is a vertical "sectional-'detail view' of? 'a proposed valve mechanism embodied/in the in- Vention;

Fig. 6 is a perspective vi'eiv similar to'F-i'g'. 5 but showing the parts of tli'etriggei" mechanism in a, dinerent position' withfrespect to eeen other;

Tlie present invention' constitute's'aii 'ini-prove"- me'nt over'tha't shown i'n r'ny ooia'panon`v applica"- tion iiledV on December'Z'', 1944,Se`1ial`No'. '5GB-1768) now abandoned, and like the invention disclosed in that application the present inventio'nfconstitutes an improvement over' that 'shown' in my Letters Patent No'. 2,304,320, dated'f'Deceniber 8; 1942'.

The drawings of this present application' illus:

'2i trate the piieferrediorm of construction-by which the' several objects ofy the' invention are accomplished; In these draw-ings and as-Y Will1 be apparent- .from the' description hereinafter tol follow, the fori-nf orthevariosA parts does'not enter into the" invention, aridthe formA shown in thefdrawings'isrtfobe considered merely thep'referreot form or coh-strnotion? for? purpose's'of illustration of this invention;

Inthi'srespect; referring toFigs'.- 1 'to 4 inclu'- sive,y the present invention includes a mounting plateT Ill which isfassociated, af suitable manner, with thel'breech block of-'tloeA gun. Ont this inount'- inggplate)` lf, yatonefend thereof, isf rnc'iiri'tedfa1 valve `housing'y Hf. Tliisvalve' housing llfisintlie form off ai b-l'oiik` M' and' provides 'a port I2, which has communication Witlraishot tube I3, This port l2 ocininunix':ates"v'vi'th''aftulcer4 l-'m'ounted in ay cou-ri# trl'or'e I6"-ffofr-rne-:d'invthe block l1'. A'port" I8 oommuni'e'ate'sj Witni'the' port I2. A valve seat lis indi'- caftedat l'9f-,fandthis valve seat' closes-l anI oric'e 2i) which communicates with afduct-Z l in'turn having communication withl a; 'suitable' compressed' air line' 22. The valve'tiibeV 1'5A includes aV packing nipple'f2'3 Wliichisthreadedv upoira thread-:bearing lo'ss Zil'g` `ai'id' rnbllnt'ed for sli-dable movement' in tli'valve' tube a'ndcomprising? a valve head 25', isifa plunger or plunger' rcd`= 26;

(3*olnmur-iicating'r with the port l2 is a' shot delivery duct 2:11 in turn vcomnu'inic':ating'- With' a slrottube Z8 bv Ineansv of whichi the shotsl `are conflnedl in' "ai manner' disclosed' 'in' my Patent o. "2230433202 it being" pointed out that the man# ner of 'supplying-the' shots7 to the supply tub'e 2f8 doesv not' constitute part' o'f this present rin'- lto" 'duct-"21g it Will plunger.' rod- VTeil1' oar- 1' y 61116632 on'. @Slifoifm'e'd'in one 'side tliereof for' pass eoi-"the 'riist'omoper'atin'gV arm '3:41, 'Saidariii' be'h' referred' to rrrorein detail l'iereihafter'. A v

` plunger '2e 'has `its 'outer end' vportion 'at slidabiv jou'fiaiee' through a me et' 'formed an integral part of ythe mounting plate l'l this plunger 526 isaI plunger head '31 and disposed between thlis plungerhead 3l andthe .lug 35 isanf yexpansion spring 3B which normally Vforces thel plunger 26 vin a leftehan'd direction' as' viewed in! Fig.. 1.

Tlreim'ountirigplatev li) carries a pintl'e' 3 Spano? pivotalli? supported 'bv y'this pintl' `lffis- 'the' -lovverA d'portlon "4 IJr of a hammer 41', 'the lianrir' '41' 't' Zofis delivered 3 having a bifurcation 42 formed in its upper end for the reception of the plunger 26.

The hammer 4| is normally held against the plunger head 31 by means of a spring 43, one end of which is connected as at 44 to the lug 36, and the other end 45 being connected to the hammer 4|. This hammer 4| has a shank 46 which provides a plate 41, having a slot 48 formed therein through which projects a latch arm 49 having a latch head 50. This latch head 50 is adapted to engage the adjacent wall portion 5| of the plate 41 of the shank 46. This latch arm is pivotally connected as at 52 to a trigger head 53, pivotally connected to the mounting block lll by means of a pintle 54'. The latch arm 491s normally held in engagement with the plate portion 41 of the shank 46 by means of a spring 55, one end of which is connected as at 56 to the latch arm and the opposite end portion of spring 55 to a transverse Wall 51 of the trigger 58, the said trigger providing a ringer piece 59.

Pivotally connected by means of a pintle 60 to the mounting plate I is the arm 6| which operates the piston 3|. This arm 6| has an elongated slot 62 formed therein, and operating 'in this slot is a pin 63. The arrangement is such that when the trigger 58 is pulled backward against the action of the spring 64 by application of the linger of the operator upon the linger piece 59, the pin 63, riding in the slot 62, will ybear against edge of the slot 62 of the arm 6| and elevate the arm 6| to the position shown in Fig. 2, and in turn elevate the plunger 30 in the duct 21 to position the shot 29 in the port |2. Simultaneously with this action, the latch arm 49, being caused to move forward, will engage the edge of the Ibight portion 48 and pivot the hammer 4| away from the plunger head 31 against the action of the spring 43. This will dispose the curved tail 65 of the latch arm 49 in contact with a pin 66 carried by the mounting plate I0, so that upon further movement of the latch arm 49 by the action of the trigger 58, the curved portion 65 of the latch arm 49 will be caused to cam against the pin 66. This camming of the curved portion 65 of the latch arm 49 against the pin 66, will pivot the latch arm so as to disengage the latch head 50 from the wall 5| of the bight portion 48 of the hammer 4|, whereupon, under action of the spring 43 (which in the meantime has been expanded by this movement of the mechanism), the hammer 4| will be caused to pivot in an opposite direction, striking the plunger head 31 with an impact force suflicient to quickly move the plunger 26 against the action of the spring 38. This microscopic movement of the plunger 26 will open the passage through the port I8 to admit the compressed air into the port |2 to eject the shot therefrom with microscopic action.

I have found from actual practice and experience that the best result and greatest speed of an air rifle shot is best obtained by the quickness in the operation of opening and closing the valve. This is accomplished by a trigger mechanism constructed in accordance with the foregoing description.

In Figs. 5 and 6 I have illustrated a slightly modied form of construction of the invention. In this form of construction the plunger 26 is journaled between the angled end portions 61 and 61 of a bracket 69 secured in any suitable manner to the plate I0. The plunger 26 has an enlarged head'portion 10 formed at its outer end portion. Pivotally carried by a pintle 1| in turn carried fby the mounting plate, |0 ls an arm 12 the top Which is adapted to bear against the head 10, as shown in Fig. 6. This arm 12 pivotally carries at its outer end, as at 13, a trip plate 14. Mounted between an enlarged portion 13 of the plunger 26 and the angled portion 61 of the plate 69, is an expansion spring 14'.

The trigger 15 is pivotally connected as at 16 to the mounting plate l0 and .includes a projection 11 which is adapted to engage a wall of the valve housing Il, to limit its pivotal movement in a clockwise direction. To the iinger portion 18 of this trigger 15 is pivoted, as at 19, a latch arm providing a latch head 8|. This latch head 8| is adapted to have engagement with a lug 82 of an arm 83 pivotally mounted to the mounting plate In as at 84. The arm 83 is normally urged to pivot in a clockwise direction by means of a spring 85 having its medial portion wound as at 86 upon the pivot pintle 84 and having one end portion 81 engaging the arm and an opposite end portion 88 engaging a pin 89 carried by the mounting plate l0. The arm 83 has an extension 90 provided with a lateral cylindrical projection 9| at its extremity. A stop pin 92 is carried by the plate I0 and is adapted to limit the pivotal movement of the arm 83 by action of the spring 85.

The arrangement is such that when the trigger 15 is pivoted in an anticlockwise direction, the latch head 8|', being in engagement with the lug 82, will pivot the arm 83 in a clockwise direction about its pivot 34 against the action of the spring 85 until the cam end portion 93 of the latch arm 80 cams over pin 94 carried by the mounting plate I0. 'I'his camming of the latch arm 88 over pin 94, releases the latch arm from engagement with the lug 82 whereupon the arm 83 is pivoted in an anticlockwise direction in snap action under the action of the spring 85. In this pivotal movement of the arm 83 the pin 9| will strike against the edge of the trip plate 14. Since this trip plate is limited by the angled end portion 96 which engages the edge 91 of the arm 12 as the pin 9| strikes against the edge 95 of the trip plate 14, the arm 12 will be caused to pivot in a clockwise direction in snap action, and this action of the arm 12 is transmitted to the plunger 26 which moves with great speed to open the valve port I8 for reasons hereinbefore set forth.

In its movement in a clockwise direction about the pivot 84, the arm 83 will engage the trip plate 14 and, inasmuch as this plate 14 is free to pivot in an anticlockwise direction, the arm 83 will, in pivoting in the direction stated, be free to move to the right of the trip plate 14, as viewed in Fig. 6.

In the form of construction shown in Figs. 5 and 6, I have not illustrated nor described the means of delivering the shot to the structure Il, as such means does not constitute a part of the present invention and any means for that purpose may be employed, such for example that shown in my Patent No. 2,304,320.

By the employment of the mechanism shown in the modied form of construction, a trigger mechanism is provided which is positive in its operation and which, like, the preferred form of construction, will result in rapid expulsion of the shot from the shot tube within the barrel.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modiilcation without departing from the spirit of the invention. I, therefore, do not Wish to be limited to the precise details of construction 5 set forth, but desire to avai1 myself of such variations and modiioations as come within the scope of the appended claims.

Having thus described my invention, what claim as new and desire to protect by Lette-rs Patent is:

1. An ir gun comprising a mounting structure, a valve structure on the mounting structure including a plunger having an enlarged portion, means supporting said plunger from said mounting structure for movement in opposite directions with respect to its length, spring means for moving said plunger in one direction, trigger means for moving said plunger against the action of said spring means comprising an arm pivotaiiy carried by the mounting structure, means for pivoting said arm in nammerdilre action. said enlarged portion to move the plunger against the action of said spring means, means adapted to have latohed engagement with said arm for pivoting said arm in an opposite direction, and means for disengaging said last mentioned means from engagement with said arm to permit said arm to be moved by said arm moving means in said hammer-like action against said enlarged portion.

2. An air gun comprising a mounting structure, a valve structure on the mounting structure including a plunger having an enlarged portion, means supporting said piunger from said mounting structure for movement in opposite rdirections with respect to its length, spring means for moving said plunger in one direction, trigger means for moving said plunger against tne action of said spring means comprising an arm pivotally carried by the mounting structure, means for pivoting said arm in hammer-like action against said enlarged portion to move the plunger against the action of said spring means, means adapted to have latclied engagement with said arm for pivoting said arm in an opposite direction, and means for disengaging said last mentioned means from engagement with said arm to permit said arm to be moved by said arm-moving means in said hammerdike action against said eniarged portion, said latch-disengaging means comprising a member carried by said mounting structure and adapted for camming engagement with an end portion of said iatch means.

WALTER A. TRATSCH.

REFERENCES CITED The oiiowing references are of record in the nie of this patent:

UNTED STATES PATENTS Number Name Date 452,382 Gifford May 26, i891 2,299,673 Beaseley Oct. 20, 1942

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