US1363696A - Gun - Google Patents

Description

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Patented 90.5.28,1920.

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APPLICATION FILED APR. 22, 1920.

l. T. THOMPSON.

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J. T. THOMPSON.

GUN. APPLICATION FILED APR. 22. 1926.

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Patented Dec. 28, 1920.

J. T. THOMPSON.

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APPucATlou men APR. 22. 1920.

Pabentdl Dec. 28, 1920.

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h faja @W0 www5 .20' asa .choke bore. The chokebore is .slightly contractedl in diameter at theV muzzle which miren srA'rlEs rem# ortica.

or ONE-HALF 'rov GUN.

Specification of Letters Patent. Patented'ec. 2S, 1920- Application led April 22, 1920. Serial No. 375,6'75. Y

lTo ZLwbom may concern."

Beit known that I,JoHN T. THoMrsori, a

.citizen of the United States, and resident'of Newport, fin the countyof Campbell and State of Kentucky, useful Improvements in Guns, following is a specification. .1

My invention relates to improvements in firearms and .more particularly to animhave invented new andl proved double 'barreledautomatic shotgun...

Shotguns of the single loading type have very generallyl been made with double barrels.` While one reason for this construction was to secure two shots without reloading, it.

general practice -to prohas come to be the vide such guns with barrels differing in 'interior conformation andthereby-adapted to be vused forgdilferent purposesf -Customarily one,` barrel is lformed vwith a cylindrical herev and the other barrel with what is known has the eect of bunching the shotV more closely, thus givingit' .somewhat greater par# rymg power and making a closer pattern at the .longer ranges. I t is'usual vtouse the cylindrical bore when vthe game close vand to use the hokevbore forthe'second shot when the. game isv more 'dist ant. A' choke :bore isnot ,desirable for 'use in shooting 1 game at short ranges since the close-b li ing ofthe shot tendsy to cause the game Vbe unnecessarily mutilated and so filled with s hot as to be unfit for consumption. `In usf u va cylindrical bore. for the `Y Vthe' shot is so Widelyseattered that game may Y be i l"ih"center ofthepattern andyetnot .receive sufficient shot to disable-orI kill-it.

ese two'types .ofbores each .have their `individi'lal characteristics and functions and are., not interchangeable for their special uses.A In' so. far, as yI- am' ami-e, automatic shei- Y.

guns heretofore designed have'beenmadef t Ain eitherfbarrel, and n1eaus' for selectivelyre easing the firing mechanism of the loaded long range wf '1f' vveither cylindrical ori choked. orin some cases' has been made with a modified' choke .in the endeavor to secure the advantages of both-rgfiringmechanism of both barrels.A It is an Athesoylindrical and choked types'ofjbarrel.

While an automatic gun 'of this type accom- Y plishes tlle purpose of providing a plurality of shots without reloading, it ean not furnish the user with-the different barrels forclose and distant shooting.

one shot from either or both Furthermore a large number of- Sportsmen and users of Shotguns are accustomedto using a double barreled miliar with its ffeel, and its appearance, and they are accustomed to sighting along lthe broad .top of a double barreled gun. For all of these reasonsthey prefer a gunwith --two barrels and Wllnotuse the single-barreled automatics which' differ widely in ap# pearance and feel from the guns to'which thely have been accustomed.

' heusual'double .barreledsingle loading Shotguns-provide two shots without reloading but these shots, in guns provided with one cylindrical and' one limited to one 4shotffrom such barrel. It may often occur thatl conditions are ,s ch that it is not at all'desirable to fire twofshots in this manner. That is, the nature of the'game' `may be such that 'it cannot be closely` appreached in which case shots from the choke large flocks or coveys which. may be closely approached so that morelthan one shot-.from

a cylindrical bore may be desirable. While In either of these two conditions vided with both the cylindrical and choke barrels and yet'which will re more than barrels jsele'cj tively at the will of the user.

gun. They are vfathen, the usual double barreled gun is often little if any better than a single barreled gun forl the particular purpose7o'f the moment. The, gun to be most. desired is a gun which is prochoke barrel,- -are bore'onlylwill-be'useful,n On the other hand@ the gamey may -be of 'a character found It is an object of my invention to provide" l 'a `new and improvedautomatic gun, and

more particularly a double barreled shot gun permitting selective. lire of the twobarrels.

is also an object in Vconnection with such a gun to provide v`means 4for selectively loadbarrel by-a'singletrig'g'er c'o'nmon to the so construct this means as to' pemit'the seioo .. additional object to provide automatically quence tobe variedatthejwill of the'operator. Itis a further bbject to provide a gun.

.of the character describedwhich is simple in construction and inexpensive to manufacture, which is compQsed of relatively few parts and which is safe and positive in its operation. Other and further objects will appear as the description proceeds. l I have shown a preferred embodiment of my invention in the accompanying drawings, in which v Figure 1 is a longitudinal section showing the breech mechanism of my gun in the closed position;

Fig. 2 is a section similar to Fig. 1 but showing the breech just as the closing movement is started;

Fig. 3 is asectionsimilarvto Fig. l, but' showing thebreech almost closed Fig. 4 isa plan view, on an enlarged scale and 'partly in section showingthe breech block and firing mechanism;

Fig. -5 is a plan viewof the breech.` block;

Fig. 6 is a section on line 6-6 of Fig. 5;

Fig. 7 is a side view of the breech block;

Fig. 8 is a view of the breech block as seen fromthe forward end;

Fig. 9 is a section taken on line 9-9 of Fi 7 i ig. 10 is a side View of the firing: pin; f Fig. 11 is a plan view of the firing pin;

Fig. 12 is an end view of the firing pin as seen fromthe rear;

Fig. 13 is a plan view on line 7-7 .of Fig.

'14 on an enlarged scale showing thettrigger and* loading control mechanism;

Fi 14 is a side view on an enlarged scale showlng the firing mechanism with the trigger in its rear position;

-Fig. 15 is a"viewsimi1ar Fig. 14 but showlng the trigger in the forward position;

Fig; 16 is a cross-section onA an enlarged scale, taken on line 16-16 of Fig. 14;

Fig. `17 is a cross-section on an enlarged scale, taken on line 17-17 of Fig. '1;I

Fig; 18 isa horizontal section on an enlarged scale showing the cartridge detents;

ig. 19 is a fragmentary elevation showing one of the cartridge deten'tsf,r

. ig. 2() is a fragmentary section illusv trating the operation of the ejectors';

Fig.`\ 21 is a section on l1ne 21--21ofl Fig. 1; l ig..22 is aperspective view of the lockmember ;l

ig. 23 is a fragmentary view illustrating I the relation of the lock to the receiver;

Fig'. 24 is a fragmentary view Ashowing the loading and firing indicator 5' rY/Fig. 25 is a fragmentary side view, 'partly '1n section, showing thea'ctuator; -j

Fig.;26 is a fra entaryvewgshowing the actuator as seen rom the'rear;

Fig. 2 7 is@ fragmentary-.view showigihe.

".ctuator in its .lowered position Aa widene Fig. 28 is a view of Fig. 27 as seen from 65 Fig. 30 as Seen from magazine tube 31, magazine spring 32, follower33, fore piece 34, assembly block 115, receiver 35, housing 36, andstock 37.

The breech block 38 reciprocatesin the receiver 35., 'riding upon they ledges 39 on the lower edges of that member as shown in'go Fig. 16. The forward portion of the block as shown in Figs. 5,6, and 8 is reduced -in vertical depth and bifurcated to form the twin bolts 40-40. Each bolt is provided with the longitudinal slot 41 vopening 85 `through its Lipper surface andlthrough, the forward end at '42 to permit passage of the iringpin 57.' The lower surfaceof the breech block is recessed at V4343 to receive the loading cams 44 which are pivoted on the 90 pins 45 and are normally depressed'lby thel springs 46. `The rear ends of these. cams 44 are formed to contact with the upper surface of the recesses 43 so as to prevent the Vcams dropping'below the position shown in 95 Figs. 1 to 3.

The rear portion of the breech block .is pierced at 47, 47 to receive the sears 48 which are pivoted upon the pin 49. The

sears are normally pressed upward bythe springs 50 which are lretained in position by the pins 51. The rear face of the breech block is recessed at 52 to receive the forward end of the recoil thrust rod 53. The sides of the block are lprovided with oblique v grooves 54to receive the side members 55 of lthe lock 56.

Each forward member of the breech block or bolt 40 is provided with a firing pin 57 formed, as shown in Figs. 10, 11 and 12, with 110 a verticallly flattened forward portion 57 and rear portion 58 having the dependin member 59, the forward surface of which is'adaptedto coperate with the cross bar 60 of the lock and the foot of which en- 1 -15 gages the Sear 48.

' he lock 56, shown in Fig. 22, has the side members 55 .sliding in the oblique groove 54 of the breech block,l these -side members carrying the lugs 61 which slide-in the'120 grooves 62 in the receiver as shown in Fi -23 and after leaving the grooves 62A -ri e,

rearwardly on the ledges 63 during the recoil of theabreech block. The cross' bar 60 ofthe lock extends across the full width of l thewbreech block and its rearsurface cooperating with the sloping surfaces 59 of the firing pins carries those members rearwardly to the cocked position during the unlocking movement of the bolt as is clearly shown in Figs. l and 2.

The inner face of the left-hand side of the receiver is. provided with the 'ejector 64 which operates in the slot 65 of the leftthe left-'hand barrel. tends 'down from the .hand bolt 'and acts to eject the-shells from The lug 66 which exupper innerface of .the receiver and operates in the slot between the twin' bolts 40, carries the ejector 67 for the right-hand barrel which operates in the slot 68 in the right-hand bolt. As clearly shown in Fig. the ejector 67 is slightly in the rear of the ejector 64 in order that it may not interfere with the shells ejected from the left-hand barrel.

the receiver, 'riding under U The bolts each carry on their right-hand the spring eXtractors 69 as shown in.

The gun is provided with the hand actu- .ator 70 which operates'in the channel between'the two twin bolts. This actuator is provided with the finger piece 71, the .top guide 'piece 72 riding 'on-'the outer surface of and the lower guide lugs 73 the lower'surfaces of the twin bolts as best shown in Fig. 21. The rear sloping surface 74 of .the

. member.

actuator coperates with the cross b`ar"60 of the lock This hand actuator is not attached toany l other members" of the gun, andl in the normal automatic action of the piece it does not reciprocate. It is formed sothat the fingerpiece 71 may be folded down into the for# ward portion of the slot 116 in the receiver Y through which the actuator passes. The

lower extension 118 of the finger piece is hinged to the actuator by the Vpin 117 A plunger 119, pressed upward by the spring 120, bears agaist the lower face of this lmember 118,-and due to thecam formation of this surface, theplunger tends to yieldably maintain vthe .finger piece in either the upper or lower position. To facilitate v.ljtzirig the finger piece from the lower to the.VA upper positions 'it is provided with the grooves 121 and the adjacent 'edges of the slot 116 Vare cut away as indicated at 122. The topguide 72 is separable from Athe actu ator, being screw threaded thereto as indicated in Figs. 25 and 28, and with the-finger piece 71 in the upward position, the member 72 may be screwed from the4 actuator gto permit the breech'blockfto be moved bling the gun. l The firing pm actuating' sprlngs 75 are, seated in the bolt 38, their forward ends downwardly'. and forwardly in 'disassembearing against vthe rearvof the firing pins and their rear ends against the` forward face of the rear of the breech lblok.

As shown in Fig. l'18, eitllenside receiver adjacentthe rear end of-:thejnaga-f ;zine is provided with a cartridge detent normally held pressed j outward by the spring 77. 'lheA upper edge of the'detent is beveled as shown at 78.

The recoil thrust bar 53 bears at its .lower end on the thrust cup 79 which bears against the recoil spring 80 whichA runs down into the stock at an A--angle as shown in -'Figs. 1 to 3.

Thegun is provided with two feed spoons 81 concave upwardly in cross section as shown in Fig. 21 vand provided with the transverse stop 82. These spoons are attached to the lift levers 83 by spring hinges 84 which are normally as shown in Figs. 1

to 3. The lift levers are pivoted on the shaft by the tension spring 89 in the position' y shown in Fig. 1.

As shown 1n F igs. 13 to15, the shaft 88 also carriesthe triggerlock cams 90. Thesev cams 90 coact with the scar actuating levers 91 which are pivoted on theshafts 92, and

the forward ends 93' of which coact with the lower en d 94 of the sears 48.

in Fig. 15 by the flat springs 95 which are fixed in the cross Yrod 96.

The' levers# 91 are normally held inthe positionshown Carried by the. shaft 88 is the gear wheel 96 which is adapted to mesh with the rack A97 mounted upon the lower face of the!-`v breech block 38.

' This rack .97 has the slotted connection 98 to the .pivot 99 oil the breechblock and is guided between the lugs 100 and the lugs 101, .which latter haveK a spring between them pressing the rack normally into engagement with lthe gear wheel 96.

The hook connecting levers 102 have their forward ends pivoted upon'the cross shaft 103 and are normally held 1n the position shown' in Fig 15 by the springs 104, the hooked rear ends 105 ,engaging the levers 91. Adjacent their forward end, the levers 102 `are provided' with seats toreceive springsl .106, the .upperends of which are seated 1n the lower face .ofcross bar 107 extending from the forwardend of the triggery lever 10.8. The rear end of the trigger lever is pivoted upon the'shaft 109'and the trigger y llhextends downward through the housing 36.

A safety catch 131, having a finger piece 132 is placedadjacentthe trigger as 'shown from the lever and wardly the latch contacts with the under sur- Asf'shown in Figs. 16 and 24. the left end .of the shaft188 extends through the housing f1 the' S 36 and hasmountged" on its outer end' the Ajlizmflrled thumbfrscrew 111 A carrying the Qin Figs. 14 'and 15.1When moved rear- A pointer 112. Numerals` as shown in Fig.l 24.A are marked on the outer face of the receiver around the thumb screw and with thev pointer .112 serve to indicate the position of the several cams carried by the shaft 88. My gun is provided with means whereby it may be readily taken down for carrying The barrels and magazines are purposes.

\ assembled in the assembly block 115 and t0- gether vform a unitary structure. The sides of this block are formed with vertical ribs 123 which coact with ribs 124 formed in the forward part of the receiver 35 and thegether. The latch may be retracted bythe fore piece 34 and the gun mayT then readily be taken" down. Obviously two `of these l latches, one placed on either side, 'may be provided if desired.

' The lugs 128, shown in Figs. ff and l,2, eX- tending inwardly and upwardly from the housing 36. are provided' to prevent the breech block moving forward out of the receiver when the gun is taken down. As

finger piece 127 which extendsthrough the shown these lugs are placed "slightly, in adl Vance of the normal closed position of thej breech so that the breechblock `does not normally contact with them. y. l

gun may' be readily disassembled, first being taken down, the screw 129 which con'- nects the housing 36 to the stock is thenremovedand the housing is moved forward,

the overhang 130 sliding forward in its groove in the receiver. The housing carries I' with it the loading and firing mechanism and also the ,lugs 128 which limit forward movement of the breech block. Y. K The member 72 of the 'actuator-is .now unscrewed and the breech block may readily be slipped forwardly and downwardly out of the receiver.

The operationy cycle of considered to start with the parts in the pomy-gun maybe sition shown in Fig. 1 with the exception that nov cartridge will be in the barrel. The

two magazines are first-loaded by: pressing cartridges one at aI time in through theports in the base of the housing.v 36 against the spoons 81 which turn upward vaboutl the spring pivots 84. The cartridges are then pressed forwardagainst the `followers 33 into the magazines 31.` which preferably are made of a length suficient to'each contain..

two cartridges, although they may be'made to contain more if desired. The cartridge detents 7 6 turn inward under pressure -of 'the cartridges to permit it to pass vbut spring out to catch the base of the cartridge after it has been pushed into the magazine as shown in Fig. 18 and thus prevent it from being forced out by -the magazine spring. The spoon-81 is then returned to its position as shown in Fig. 1 bythe spring iny the Y hinge 84, the side of the spoon contacting with the beveled surface 78 upon the upper edge'of the detent and forcing it in and ut of position,`the spring inthe hingev being stronger than the detent spring 77 n When the spoon reaches itsv normalposition', the magazine spring forces the cartridges rearwardlv. the rearlfnost one being stopped by the lug 82 upon'the spoon.

The magazinebeingfloaded and; thev cam shaft being turnedso that the right-hand' spoon control cam isinv the positionshown in Fig. 2, the indicator 112 lpointing to 1,

las

the'breech block is 'now' pulled' to the rear Y by means of the finger piece 71 of theactuator.vv Upon pulling the actuator to tle rear its rear cam surface 74 coperates withthe cross piece 60 of the lock to lift that member which is drawn rearwardly and up- ,wardly relative to the breech block and the receiver, the 'block being guided inthe" oblique slots 54 in the breech block and being guided relative to the receiver b the interfit of the lugs 61 inthe'channe s.62. When the lugs 61 clear the .rear face of this channel 62 the block and lock move rearf wardly, maintaining the relative position" shown in Fig. 2. It will -be noted that during this unlocking movement the rear face ofthe cross bar (iO-has coperated with the firing 4pins to carry them rearwardly until they,

have become held by the sears 48. In Fig-.g2

the actuator isA shown in its forward position v wherev it remains during subsequent 'automatic operation, but when used for *manuali operation it wouldbe at the rear bearing.

against the cross-bar 60 of the lock. v

. As theblock moves rearwardlyv the right hand cam 44 contacts with the lever arm 86,'

and'lifts Ithe spoon into l.the position. shown in Fig. -2. The spring 46 is strong enough to maintain the ca'm 44 downward and to cause the spoon to lift against the resistance ofthe. Vlight spring 89.v During this rearward movement therecoil thrust bar 53 has compressed the spring 80 and upon now releasing the actuator' that spring forces the breech assembly forward-carrying the cartridge into the chamber. As the spoon swings the rearmost'cartridge upward, it

passes above the cartridge detent 7 8-which swings out and prevents the-next cartridge from moving rearwardlyand" catching under the spoon. When thev spoon drops down the cartridge is released from the detent as has l heretofore been described. *f A.The control cams 87 for the. right and left spoon are at an angle of4180 from each As the breech block moves rearwardly,

the pivot 99 passes along the slot 98 in the rack 97 until it reaches the rear end of that slot when it carries the rack rearwardly with it.- Due to the form-of the teeth upon the rack and thewheel 96, the latter is not rotated, the rack pressing upward against the spring between the lugs 101. When the breech block moves forward the teeth on rack and wheel Vintermesh and the pivot 99 passes to the forward end of the slot 98 and then carries the rack forward with-it'for the latter portion of its motion. The slot, rack and wheel are so proportioned that the wheel is rotated 903during each forward motion of the bolt, thus' turning the cam shaft88 and the spoon fan'd trigger -control cams through that angle. v v y The gun now has its right barrel loaded and the firing pins cocked `and the right hand trigger control cam' 90 is in the osition shown in F ig; 14 while the left-hand trigger control cam is in the position shown in Fig. 15.

If desired another cartridge may now be inserted in the ri ht-handmagazine, thusmaking a total of igve, four in the magazines and one in the right-hand barrel..

To fire the right hand barrel it is now simply necessary to pull the trigger. Pulling the trigger rearwardly mow es the trigger lever from the position shown in Fig. 15 to that of Fig. 14. VThe left-hand lever 91 is retained inthe position shown in Fig. 15 by the cam 90 and lever simply compressesthe left-hand spring 106 betweenthe lever 102 and the cross arm. 107. Upon the right-hand side ofthe gun,

however, the lever 102 is depressed by the pressure transmitted through the spring 106 andthe hooked rear end 105 of the lever pulls down the .lever 91 thus thrusting the cam 93 against the lower arm 94 of the sear and drawing the sear downwardfto release the firing pin. As shown in Fig. 1 4 as this is done the lever 105 slips of the end of the lever 9 1 thus disconnecting the trigger from the sear and preventing the gun from being fired a second time upon automatic reload` ing, which-takes place more rapidly than it is possible torelease the trigger pressure.

The relation of the oblique slots inthe breech block and the receiver tothe side members and the lugs upon the lock Ais such as to lockthe breech block upon what is -known as the Blish angle, as described in the patent to Blish, 1,131,319, March 9, 1915.

the movement of the trigger barrel will be loaded.

.described for the manual Voperation* is such that when the bolt goes forward after the lirst or hand loading, the spoon control cam on the right side will move in the' counter clockwise direction from the position shown in Fig. 2, and the left-hand cam will move through the same angle counter clockwise from the position shownin Fig. 1. It will be observed that these positions still permit the right barrel to be loaded and prevent the Left barrel from being loaded when the bolt is next opened.

After this first loading the right and lefthand trigger cams will be in the positions in which the cam 90. is shown in Figs. 14 and 15, respectively.

On the "loading and closing movement after firing the first shot, the right barrel will havebeen again loaded and the rack 'and wheel will againturn the cam-shaft through 90o counterclokwise as seen in Figs. 14.

and 15. This 'wrllthen have been a total movement of 180*and the right-hand spoon' control cam will have moved from the-po- :sition shown in Fig. 2 to that shown -in Fig. l andthe left-hand cam'vice-versa, so that .the third cartridge will be loaded into the left-,hand barrel.

The right-hand barrel is now loaded how- I i ever with ,the second cartridge and since the vright-hand trigger. control cam will be in a position 90 counter position shown in Fig. 14, the right barrel can still be fired.

clockwise beyond-- the' On-ring the second shot, thel left .barrel l will be loaded with the third cartridge and `on firing the Athird shot the left barrel-will again be loaded frthe fourth shot. `Firing this fourth shot will completethe cycle,

the cam shaft will have been rotateda total" of 360 degrees and,'if the right-handmagaf zine has had a fifth cartridge placed in it since the initial hand loading, the" right lactuated between the loading of a shot and its being fired since the loading lift takes.

place at the end ofthe rearward stroke while the-necessity for any fur-l Upon now reloading Y from the right.

the firing takes place after the forward stroke during which rotation of the cam shaft takes place. shownin Figs. let-'and 15 the ring cams are 90o in retard behind the-loading'cams on the same side of the gun.

By means of the thumb screw 111 the sequence of shots may be varied as desired. If the Screw is turned before firing'the first shot but either before or after loading it, so that the indicator points to 2, one shot only will be fired from the right barrel, followed by two from the left barrel. Or if the screw is turned to 3 before loading, the gun will fire two shots from the left and then two v The screw may be turned atany time durthe cycle .of lire and turned to any l quadrant, provided, however, that if it is Vturned. so as to lire the barrel other than Therefore, as clearly I that loaded the bolt must be manually ret'racted to-load that other barrel, this retraction extracting and ejecting the uniired Vshell from the loaded barrel. Either or both magazines may be loaded at any time during Vthe cycle of fire when one or both of the cartridges therein have been fired orv lifted to the barrel.

The magazines of my gun have been made short so as to shorten the length of the fore piece and to preserve the appearance and balance of the usual non-automatic double barreled shot gun. A

My recoil springhas 'been made to extend intothe stock thus shortening the necessary length of the receiver and tending tov preserve the usual shot gun appearance.

Since I use the Blish lock which does not unlock until the'breech pressure has much barrel also recoil under the initial Vheavy decreased I do not require the veryvhea'vy recoil springs found in the usual automaticA shot guns wherein the breech and often the powder pressure.

VBy loading either barrel and then filling the corresponding magazine I may fire that barrel three times in succession without reloading the magazine, by turning the cam I shaft backward 90'betweeneither the first and second or second and third shots.

4WhileIhave shown and described a gun Vadaptedto. fire the two barrels each for two successive shots, it is obvious'that by simpl varying thelength'of'the toothed rack 9 and the length of the slot 98 which permits lostmotion, I may cause my gun to fire each magazines of that capacity.

barrel alternately or onthe other' hand to fire each 'barrel three times lb providing her variations in the 'cycle of fire may be readily made lby changes in the sizes and location of the cams on the cam shaft 88. i A Y. v It' willbe observed from an examination of Fig.`29, that the central upper portion of the assembly block and the receiverare depressed. While this aids in maintaining a rigid connection between the parts, its 'most important function is the provisionof a level surface extending along the receiver and between the barrels. With the actuator folded dow-n, the line of sight along the gun will be 'entirely uninterrupted and similar to that on the usual double barreled shot I claim:

1. A gun having a plurality of barrels and means for automatically loading the barrels in predetermined sequence, and by which each barrel is normally loaded a plurality of successive times.

2. A gun having .a plurality of barrels 'and means for loading :the barrels in premeans adapted topermit the trigger to tirez a. barrel which has been loaded.

' 4. A gun having a plurality of 4barrels and means for automatically loading the barrels in predetermined sequence, said means being adjustable to vary the sequence, and a single trigger and control means adapted to ermit the trigger to fire the barrels in t e sequence in which they are loaded.

5. A gun having two barrels, a firing pin for each barrel, a, Sear for each firing pin, a single trigger yieldingly connected to both sears, and control means adapted to prevent movement of the trigger from lbeing transmitted to both said sears simultaneously.

6. A gun having two barrels, a firing pin; for each barrel, a Sear for each ring pin, levers adapted to actuate each Sear, a single' trigger yieldingly connected to both said levers and means preventing simultaneous -movement efboth said levers.

7. A gun having'two barrels, a firing pin Afor each barrel, a sear for each'firing pin,

levers adapted to actuate eachvsear, a slngle Vtrigger connected 'to both said levers and means preventing'movementof one of said levers, the connection between said levers and the tri r`being'adapted to yield and to permit t Ve trigger to be moved/to actuate the other lever. f 'ff les 8. A gun having'two barrel/S', a -iring pin for each barrel, a scar for each firing pin, an actuating leve'nfor each sear', a single trigger, a lever connecting the tr1gger to each Y actuating lever, and a'yielding connection betv've'enV the trigger and* the connecting levers`.

9. A gunhaving two barrels, a viringfpin,v

for each barrel, a sear for each firing pin, an actuating lever for each sear, a single trigger and a'lever connecting the trigger -to each actuating lever, the connecting lever being adapted to become disconnected from vits actuating lever at substantially the mo- 'ment'the corresponding sear releases its firing pin.

lO. A gun having two barrels, a movable breech block, a firing pin for-each barrel, a 4sear for each firing pin,- an actuating lever for each sear, and cams coacting with the actuating levers, the cams being so related as to prevent simultaneous movement of the two actuating levers.

1-1. A gun having two barrels, a movable breech block, a firing pil for each barrel, a Sear for each firing pin, an actuating level` for each sear, and cams upon a single shaft coacting-with the actuating levers, the cams being so related -as to. prevent simultaneous movement of the two actuating levers.

l2. A gun having two b arrels, a movable breech-block, a firing pin for each barrel, a Sear for each firing pin, an actuating lever for eachsear, cams coacting with the actuating levers, the cams being so related as to prevent simultaneous movement of the two actuating levers, and means adapted to move' f said cams during movement of the breech block.

13. A gun having two barrels, a movable breech block, a frmg pin for each barrel,

a sear for each firing pin, an actuating lever,

foreach sear, cams coacting with the actuating levers, the cams being so related as to prevent .simultaneous movement of the two actuating levers, and means adapted to move` said cams during the closing movement of the breech bloc 14. A 'gun having twp barrels, a movable breech block, a firing pin-for each barrel, a sear for each firing pin, an actuating lever for each sear, and cais upon a single shaft coacting with the actuating levers, the cams being so relatedas to prevent simultaneous movement ofA the two actuating levers, "and means adapted to rotate said cam shaft 'during the closing movement of the breech 15./.A gun having two barrels, a firing pin for each'barrel, a` sear `for each firing pin, an actuating lever..-io}aeach sear, and rotatingcams coacting'fvitlthe actuating levers, :each cam being adapted to prevent *move-y ment ofits actuating lever during a' portion of the rotation of the 'cam and to permit said movement during the remainderof itsirotation.

'fflv 16.. A gun having two barrels, a firing 'for each barrel, a vseal* Vfor eachfiring, pin,

an actuating lever for each sear, and rotat ing cams coacting with the actuating levers,

`,each cam beingadapted to prevent movementof its .actuating lever Iduring one -half Lf the rotation' of thel cam and to permit said movement during the other-half-of its rotation. 2

' ,17. A un havingv two barrels, a firing-pin for eachI arrel, a sear for each firing pin, an actuating lever for each sear, Vand rotating cams coacting with the actuating levers, each cam being adapted to prevent movement of .its actuating lever during a portion of the rotation of the cam and to permit said movement during the remainder of its rotation, the cams being-upon a single shaft and so spaced as to prevent simultaneous movement of the two actuating'levers.`

18. A gun having two barrels, a'firing pin for each barrel, a' sear for each firing pin, an.

actuating lever for each seal-, a single trigger operatively connected to both actuating levers, and rotating cams coacting with the actuating levers, each cam. being adapted to prevent movement of its actuating lever during a port1on ofthe rotation of the cam and to permit said movement during. the re mainder of its rotation, the cams being upon a single shaft and so spaced as to prevent s1- multaneons movement of the two actuating levers.

A20. A gun having two barrels, a firing pinr ger operatively connected to both said firmg pins, means comprlsmg cams' upon a for each barrel, a breech block, a single trig- V shaft adapted to permit selective release of v said firing pins, and coacting gears upon said breech block and the cam shaft adapted im to rotate said shaft. f

21. A gun having two barrels, a ri'ng-pin for each barrel, a breech block, asingle trig ger operatively connected to both said firing pins, means .comprisingcams upon a shaft adaptedto permit selective release of said breech block and the cam shaft adapted to .firing pins, and coacting -gear's upon said rotate said shaft, during the closingmove- Iment of the .breech block. Y Y

22.' A gun having two barrels, a firing pin for each barrel, a breech block, a single4 trigI ger operativelyconnected to both said firing breech block and the camfshaft adapted to v pins, means comprising cams upon'a Shaft adapted to permit selective release of said' firing pins, and coacting gears upon said""'125 rotate said shaft, the gear upon the breech block being resiliently pressed into engage-A ment with the gear upon the cam. shaft.

23. A gun having two barrels, a ring pin for each barrel, a breech block, a single trigger operatively connected to both said firing pins, meanscomprising ca-ns upon a lshaft adapted to permit selective release of said firing pins, and coacting gears upon said breech block and the cam shaft adapted to rotate said shaft, the gear upon the breech block being connected thereto in a manner to permit a predetermined amount of lost motion between said block and gear.

24, A gun having two barrels, a firing pin for each barrel, a breech block, a singlel trigger operatively .connected to'both said firing pins, means comprising cams upon a shaft adapted to permit selective release o of said firing pins, andl coacting gears upon said breech block and the cam shaft adapted to rotate said shaft, the gears being lso associatedl as to permit the gear upon the breech block to cause rotation of the cam shaft in only one direction.

25. A gun having two barrels, a ring pin for each barrel, a breech block, a single the lockto y'unlocked position, the actuator 35. a a receiver, a breech block y.

abiiiiated forward'portion, a lock Y j 120 trigger .operatively connected to both said firing pins, means comprising cams upon a shaft adapted to permit selective release of said firing pins, and .coacting gears upon said breech block and the -cam shaft adapted o to rotate'. said shaft, the breech block gear being connected4 thereto A by means of an elongated-slot interfitting with a pivot upon the lowerv face of the breech block.

26. Ay gun having two barrels, a firing pinforeach barrel, a breech block, a single trig-v ger operatively connected to both said ring pins, means comprising cams upon a shaft adapted-to permit selective release of said firing pms, and coacting gears upon said,

Abreech block and thecam shaft adapted to rotate said sha-ft, thebreech block gear being connected thereto by means of an elongated' slot intel-fitting with a pivot upon theower face of the breech block, and the free end of the gear being normally resiliently urged away from-the breech block.

27. In a gun, a breech block normally actuated rby the discharge of the gun, a

therefor, the lock having a cam surface'tliereon, and an actuator` having aV surface adaptedf'- to coact with the cam lsurface of thelock whereby pressure upon the actuator moves remaining stationary during normal opera- .tion ofthe breech block.h

28. I an autbntcxgun; a breech block, av locki therefor, llaf'vig surfacesA inclined automatically to unlock the breech block'l after the breech pressure has decreased lto a o predetermined value, the Vlock having twoL surface; adaptedto'coact vwith one of said cam surfaces thereon,l an actuator'having a camsan'd a firing pin havi-ng a surface adapt-YL ed to .coact with thefother 'oi-said cams.`

.il 29. In a gun, a breech block, a lock therefor, the lock having two cam surfaces thereon, an actuator having a surface adapted to coact with one of said cams and a firing pin having a surface adapted to coact with the other of said cams, the lock serving to move the firing pin to cocked position during its unlocking movement.

30. -In a gun, a breech block, a lock therefor, the lock having a cam surface thereon, and an actuator having a sur-face adapted to coact with the cam surface of the lock whereby pressure upon the actuator moves the lock to unlocked position, further pressure upon the actuator serving to move the breech block to open position.

31. In an automatic gun, a breech block having a bifurcated forward portion, a lock for said breech block having locking surfaces inclined automatically t unlock the breech block when the breech pressure decreases below a predetermined value, and an actuator operatingV between the bifurcated forward members and coperating with the lock to Vcoperatin with the lock to move itto unlocked posltion, the actuator remaining stationary duringl normal operation of the breech block.

33. In a gun, a receiver, a Vbreech-block having abifurcated forwardportion, alock adapted to lock the breech block to the receiver and having a'poltion extending across the breech block, an actuator situated between the bifurcated forward portions of the breech block and having a cam surface adapted to coperate with the cross portion of the position. Y

34. In a gn, a' receiver, a breech block having a bifurcated orwardpportion, a lockadapted to lock the breech block to the receiverand having a portion extending across ythebreech block, a firing pin cin each bifurcated forward portion, the firing pins having a portion adapted to coperate 'w1th the cross portion of the lock whereby the firing pins will be moved to cocked position by the unv10c movement of the lock.

pios win bo movod to'oookod position Aby chounloeking movement of the-lock, and an actuator'situated between 'the bifurcatedforward members and adapted 'to move the lock Y membertounlockedposition.'H o- Y in oooh loifur i 105 lock to move the lock member to. unlocked'V 36. In a gun, a receiver, abreech block having a bifurcated forward portion, a lock adaptedto lock the breechblock lto the receiver andr having a portion extending across the breech block, a firing pin in each bifurmembers and adapted to movethe lock member to unlocked position by cooperation with the cross member thereof. f

37. In a gun, a receiver, a breech block having a bifurcated forward portion, a lock adapted to lock the breech block to the receiver and having a portion extending across the breech block, a 'firing pin in each bifurcated forward portion, a portion adapted to coperate with the cross portion of the lock whereby the ring pins will be -moved to cocked positionby the unlocking movement ofthe lock, andan actuator situated between the bifur'cated forward members and adapted to move'the lock member to' unlocked position, (further pressure upon the actuator serving to move the breech block to open position.)

38. In a gun, having a plurality of barrels, a loading spoon for each barrel, lift levers connectedto the spoons, said levers having actuating extensions, anda movable breech block having spring pressed cams adapted to coact with the actuating extensions during' the movement of the breech block.

39. In a gun, having a plurality of barrels, a loading spoon for each barrel, lift levers connected tosthe' spoons, said leversk having actuating extensions, a movable breech block having spring pressed cams adapted to coact withgtheactuating extensions during the the firing pins having movement of the'breech block and lock cams adapted to coact with the actuating extensions to prevent simultaneous movement thereof.

40. In a gun, having a plurality, of barrels, a loading spoon for each barrel, lift levers connected to the spoons, said levers having actuating extensions, a movable breech block having spring pressed cams adapted to coact with the actuating extensions during the movement of the breech block anoL movable lock cams -for said actuating extensions adapted when moved in contact with the extension to prevent movement thereof.`

4l. In' a gun, having a plurality of barrels, a loading spoon for each barrel, lift levers connected to the spoons, said levers having actuating extensions, a movable breech block having spring pressed cams adapted to coact with the actuating extensions during the movementof the breech block and rotatable lock cams for said( actuating extensions adapted when moved in contactwith the extension toprevent movement thereof, said lock cams being upon a single shaft.

42. In a gun, having a plurality of barrels, a loading spoonfor each barrel, lift levers connected to the spoons, said levers having actuating extensions, a movable breech block having spring pressed cams adapted to coact with the actuating extensions during the,

movement of the breech block and rotatable lock cams for said actuating extensions adapted when moved in contact withthe ex- -tension 4to prevent movement thereof, said lock cams being4 upon a single shaft, said shaft being operatively connected to said breech block whereby. said shaft during the movement of the block.

Signed by me at New Canaan, Connectif cut, this 9th day ofvApril, 1920.

JOI- IN T. TH() il" isA rotated

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