US1802198A

US1802198A - Shotgun

Info

Publication number: US1802198A
Application number: US424665A
Authority: US
Inventors: Cosmi Rodolfo
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-02-15
Filing date: 1930-01-30
Publication date: 1931-04-21
Anticipated expiration: 1948-04-21
Also published as: DE577762C; GB348580A; FR690014A

Description

' R. cosMl April 2l, 1931.

SHOT GUN Filed Jan. 50. 1930 5 Sheets-Sheet l E s o Q m N e mm o we e.. .SEEUMIUHWUI. .UVIHWuWwI niv/1M! Q w RIE. la v .HE me e. ...L i i Mf/ .||.4|.l|.hv/F E mt 7 qll .f i m M z... 1...., J .s raw E o. e E 2 @N m: m mm. me .m mb a I Dn ./w/ m .mmh- N... 5 .v E E QN m: m m NN 8 mm 5 9 mm E W e m @d JJM h. @91.6 I. .QV E E ..-Q..m.e..-.w.. @N Q i; ma? mm" NN mw m4 m mN @E Q m N L E t @u s S N ,lmw E NQ 5 E @VII m 8 a 2 S. m2 t Q QN m NN E n@ w 3 N mm Q Q i l .1 \.f m f.. e m9 .,I I .V E Y N E. wg S a. p mm me wm w .m- E M 2 2 s m. 2: E .k ai: mm aww Q om R. COSMI April 2l, 1931.

suo-r Gun 5 4sheets-sheet 2 Filed Jan. 30. 1930 fnl/vhf A?. (anni I, ,ld/W

R. CSMI SHOT GUN Apr-i121, 1931.

Filed Jan. 30. 1930 5 Sheets-Sheet 3 mmlo. m @N @di R. cosMl 1,802,198

SHOT GUN Filed Jan. 30, 1930 5 Sheets-Sheet 4 April 21, 1931.

R. COSMI sI-xoT GUN April 2l, 1931.

Filed Jan. 30, 1930 5 Sheets-Sheet 5 Patented Apr. 21, 1931 UNITI-:D STATES RODOLFO COSMI, OF M ACERATAFELTRIL. ITALY SHOTGUN Application led January 30, 1930, Serial No. 424,665, and in Italy February 15, 1929.

This invention relates to a self-loading shot gun provided with means for stopping automatic loading when required to fire shots by pairs or to fire cartridges of different nature loaded manually in the gun or for complying with further requirements.

On the annexed drawing is shown by way of example an embodiment of the present invention and Figure 1 is a central section of the gun in ccifndition for firing with some parts broken o Figure 2 is a fragmentary vertical section on barrel axis with gun parts in full-recoil position. n

Figure 3 is a fragmentary vertical section on barrel axis with parts in cartridge-case ejecting position.

Figure 4 is a fragmentary vertical section on barrel axis with parts in gun-loading position.

Figure 5 is a fragmentary longitudinal section of' the gun in open position.

Figure 6 is a section to an enlarged scale of the body portion of the gun with some parts in view from the direction of arrow marked 6 in Figure 7.

Figure 7 is a plan view corresponding with Figure 6, the barrel, barrel breech, bolt and breech casing being omitted.

Figure 8 is a fragmentary view from the direction of arrow 8/9 in Fig. 7 and shows the hammer ready for firing.

Figure 9 is a fragmentary view similar to Fig. 8 from the direction of arrow 8/9 1n Fig. 7 with hammer in full recoil position.

Figure 10 is a fragmentary section on line 10-10 of Figs. 6 and 7.

Figure 11 is a section on line 11-11 of Fig. 6 with parts in a different position.

Figure 12 is a fragmentary section of the loading chamber.

Figure 13 is anouter'view of the bolt.

ligure 14 is a section on line 14-14 of Figs. 13, 16 and 17.

Figure 15 is a section on line 15-15 of Figs. 14, 16 and 17.

Fi re 16 is a front view of the barrel breec and bolt.

Figure 17 is the rear view of the parts shown in Fig. 16.

Figure 18 is the rear view of the lock locking the bolt in the barrel breech.

Figure 19 is the section of the barrel breech on line 19-19 of Figure 20.

Figure 2O is a plan view of said barrel breech.

Figure 21 is the rear view of said barrel breech.

Figure 22 is a view of the breech casing with parts in section.

Figure 23 is a detail sectional view showing the clamping device for the front rod, said section being on line 23-23 of Fig. 1.

The gun comprises (Figure 1) butt-end 1 which encloses the magazine 2 and has the body 7 connected therewith; said body 7 carries the elevator 3, the trigger' gear with hammer 4 and bolt actuating means 5--6. On said body 7 is hinged at 8 a breech casing 9 (Figure 22) in which are mounted to reciprocate a barrel 10 with barrel breech 11 and bolt 12 which encloses striker 13. In head 20 of the breech casing 9 is screwed a rod 14 on which slides collar 15 solid with barrel 10.

A stock-carrier 16 is hooked at its front end on rod 14 by means of device 17 .to be hereinafter described in connection with Figure 23, and at its rear end said stock-carrier 16 provides a hinge shoe 18 which embraces eye 19 of the body 7 to engage the breech casing 9 thereon.

Intermediate the head 20, connecting rod 14 with breech casing 9, and the barrel collar 15 is located a recoil spring 21, whose action is adjusted by means of nut 14.

The magazine consists of a tube 2 opening in the loading chamber 22 (see Figure 12) provided in body 7. In magazine 2 is lo- ,cated a feeding spring 23 provided with a piston 24 intended to act on cartridges.

Above magazine 2, in the butt-end 1, is located a sleeve 25 enclosing a bolt-closing sprlng 6 which acts on a plunger 26 adapted to reclprocate ,in sleeve 25; the mouth of said sleeve 25 which opens in the standing breech 27 has a smaller size than piston 26 to prevent this piston from esca ing from said sleeve. In standing breech is mounted the holding-down key (Figures 6 and 7) pivoted therein by means of a vertical pivot 29 solid therewith and actuated by blade spring 43 which tends to move it into holding-down position. Within a hollow of standing breech 27 is located a latch 30 (Figures 7 and 10) movable longitudinally and urged .by a spring 31 into its position in which its projection 32 extends into recess 33 of standing breech 27 entered by the holding-down tooth 34 of the breech casing 9. Said key provides at its top portion, a collar 35 intended to engage notch 36 of the tooth 34 and said collar 35 has notches 37 and 38, notch 37 having a shape corresponding with that of recess 33 While notch 38 has a smaller depth than that of 37 and provides only for passage of an up- Ward stem 39 of latch 30.

Said latch 30 has further a tooth 40 entering an opening 41 of the standing breech above the outlet of sleeve 25 and a side tooth 42 acted on by spring 31. The key-closing spring 43 acts in the notch 44 of a lower collar 45 of pivot 29 of key 28, which has a tooth 46 adapted to abut on said standing breech 27 and to prevent key 28 from moving beyond its holding down position.

Tooth 40 projects into opening 41 to a shorter extent than stem 39 of latch 30, and thus latch 30 may be moved down against action of its spring 31 to make tooth 40 inoperative without stem 30 releasing top collar 35 of key 28.

Under the body 7 is mounted a triggerguard 47 where trigger 49 is fulcrumed at 48 (Figures 1, 6, 8 and 9) said trigger 49 having an arm 50 extending in the hollow of body 7. Trigger 49 may be locked by safety-catch 51 actuated by arm 52 fulcrumed at 53, rod 54 and knob 55 mounted to slide on the top of butt-end stock.

The loading chamber 22 (Figure 12) which is provided in the body 7 on the extension of magazine 2, has at its bottom a slot 56 in which is mounted to move a latch 57 fulcrumed at 58 (Figure 11) and urged into chamber 22 by a spring 59-59 (Figure 6) held in position by means of a tail 60 which enters a bore provided in thickness of the bottom wall of loading chamber 22.

The outer arm 61 of latch 57 is acted on, in a direction opposite to action of spring 59-59, by a lever 62 fulcrumed at 63 and actuated by a knob 64 which extends outside of the body 7 adjacent to trigger-guard and trigger and is pivoted at 65 in the body. Said knob 64 has a tooth 66 movable in recess 67 of lever 62 and said tooth 66 when knob 64 is moved forward extends under an end tooth 68 of lever 62 and holds the adjacent end of said lever lifted, said knob being held by the reaction of spring 59 in position imparted thereto.

Above loading chamber 22 is located a longitudinal guide-way 69 (Figures 6, 7, 11,

12) closed at front end and having inturned edges, to provide a dovetail section, the way of said guide being in register with sleeve 25 enclosing the bolt-closing sprin 6; in said guide-Way is engaged a bottom eaded stud 70 of plunger 5 havin a stem 71 adapted to abut on piston 26 o spring 6. Stem 71 has a groove 72 which connects with rear end of the same by a slope 73. The plunger head, intended to act by its front face 74 on bolt 12 to be hereinafter described, has a side recess 75 engaged by the tooth 40 of latch 30 (Figure 10).

The trigger gear (Figs. 8 and 9) comprises hammer 4 fulcrumed on the side Wall of loading chamber 22 by means of a pin 76 held in position by a plate 82 fastened on said chamber; said hammer 4 is acted on by a striking coil spring 77 located in a side tubular seat 78 of loading chamber 22 and abutting on the head of a plug 79 engaged in said seat 78 by means of side pins 7 9 entering bayonet slots 78 of seat 78. The opposite end of spring 77 acts on a plunger 80 having a fioating nose Sl which engages recess 82 of the hammer hub. Hammer 4 has a recess 84 whose sides have teeth S25-86 respectively and said recess 84 is entered by an arm 8T of scar 88 fulcrumed at 89 and having a tooth 90 acted on by trigger arm 50: at its top said Sear 88 carries an arm 91 on whose transverse face bears the end of an arm 92 fulerumed at 93 on the loading chamber 2:2 and having a tooth 94 which enters rvroove 7 2 ofthe plunger 5 and may be shifted by end slope 73 thereof. A spring 100 urges said arm 92 with tooth 94 in the bottom of the groove 72 and with its free end over the end of arm 91 (Figures 7 and 9).` Arm 87 of sear 88 has a side/tooth 95 in front of tooth 85 of the hammer recess 84 and on the end of said arm 87 is fulcrumed at 97 a awl 96 intended to engage other tooth 86 o the hammer recess 84, said pawl 96 being held by a spring 98 against a stop 99 of arm 87. The gap between teeth 85-86 is shorter than distance intermediate operative faces of tooth 95 and pawl 96.

On the other face of loading chamber 22 (Figures 6 and 7) is fulcrumed at 101 an elevator arm 102 which at its front end pro` vides a sloping edge 102 and carries a shovel 3 extending into a body space confined at its frontend bytransverse surfaces 7 said shovel being under loading opening of the barrel breech; shovel 3 provides at its rear end a depending tooth 3 lying in front of a doubleslope guide projection 180 of body 7.

Elevator includes a two-facet cam 104 whose facets may be engaged, in accordance with the elevator position, by the end 59 of the spring 59 to resiliently hold. said elevator in either of its swinging positions it has been carried in. The rear end of elevator arm 102 has a pawl 105 providing two points 106-107 and fulcrumed at 108, said pawl being further under the action of a spring 109 located in a bore mad(` in the thickness of the elevator arm 102. Pawl 105'while being able to oscillate in the direction of the arrow in Figure 6 against action of its spring 109, is rigidly solid with arm 102 in the opposlte direction due to direct abutment of its side edge with the opposite edge of its seat in arm 102. Adjacent the pivot point of pawl 105, arm 102 has a recess 110 intended to engage fulcrum pin 63 of lever 62.

In body 7, parallel with the elevator shovel, is arranged a blade 111 able to rock around pivot 112 Whose axis is transverse to axis of oscillation of elevator, said blade 111 being thus able to come above lower edge 103 of elevator shovel 3 and to keep said elevator down. vA spring 113 acts on blade 111 to hold it in its elevator-shovel engaging position.

The barrel breech 11 (Figures 19, 20 and 21) connected with the barrel 10 has at its top a. slot 114 whose rear face 125 provides the abutting surface for bolt lock 123 as hereinafter described, While its front -face 126 is sloping; at its rear end said barrel breech has a notch 115 in which projects the lock control tooth 174. The barrel breech, having the contour illustrated in Figure 21 to provide a bottom opening for insertion of cartridge into barrel and a side opening for ejection of the fired shell, carries the ejector comprising a fork claw 116 pivoted at 117 and urged by spring 118, said claw being in register with a groove 119 extending over the Whole length of the barrel breech. The barrel breech has two bottom side lugs 120 entering longitudinal guide-ways 177 provided in the breech casing 9.

rIfhe bolt (Figures 13, 14, 15, 16, 17 comprises a plug 12 which at its bottom has two ribs 121 located on the extension of the guide lugs of the barrel breech and running in grooves 177 of the breech casing 9 to guide said bolt 12 in its reciprocations in the breech casing; at its rear end bolt 12 carries a headv 179 engaged by the head of plunger 5. In the bolt 12 a lock 123 is fulcrumed by means of transverse pivots 122, said lock providing a top tooth 124 intended to engage the face 125 of the slot 114 of barrel breech 11, a notch 126 and a sloping rear tooth 127 intended to engage a control or release tooth V 174 carried by the breech casing 9. The bolt has a further side notch 176 intended to engage the elevator double-pawl 105.

Lock 123 may move through bolt slot 128 and' it has a side tooth 129 actuated by an arm 130 located within slot 128 and fulcrumed at v131, said arm having a depending handle 132 for the bolt manipulation; in slot 128 is located a spring 133 acting to lift lock V123 to cause its tooth 124 to enter slot a flat-facet recess entered by the pivot 131 of handle 13G-132, said pivot having a fiat facet 141 engaged by an adjacent flatfacet of the recessed head 137 to cause actions of spring 139 on shutter 136 and of flat facet of head 137 on that 141 of pivot 131 of the handle 130-132 to hold said handle, when free, depending under the bolt. An extractor hook 144 is mounted in the slot 138, it being carried by a crank lever 142 fulcrumed at 143 and urged by shutter spring 139. On the other bolt side is located the ejector tooth 145 fulcrumed at 146 and urged by spring 147. Said ejector tooth 145 is on the extension of a rib 148 intermediate two grooves 149 through which move points of the stationary ejector fork claw 116 carried by the barrel breech, while the movable ejector tooth 145 and rib 148 slide in groove 119 of the barrel breech.

The striker 13 (Figures 14, 15, 17) is concentric with bolt 12 and carries at front end a tiring pin 150 connected with longitudinal central stem 13; this stem moves through slot 134 of lock 123 and its rear end provides a head 151 whose side extension 1:52 is intended to be struck by hammer 4.

Head 151 provides at its front sloping surfaces 153 acted on by lock sloping surfaces 135. At its front striker 13 has an transverse to lock pivot pins 122.

As described, barrel 10 and barrel breechV 11 are mounted to reciprocate in the breech casing 9 (Figs. 1, 6, 11, 22 and 23) which is hinged on body 7 by means of hook 155 depending rom head 20 and embracing pivot 8 fastened in body eyes 19, and further by means of shoe 18 of the stock carrier 16, which shoe embraces the outer surface of eyes 19. The stock carrier 16 at its front end is fastened on rod 14 by means of side teeth 17 provided at the two ends of a U- shaped frame 156 carried by a stem 157 mounted to slide in head 158 of stock carrier 16. A spring 159 bearing on head 158 and on the end knob 160 of stem 157, holds teeth -17 over transverse teeth 161 of rod 14 and a bore 162 parallel with the barrel axis, in

which is mounted a latch 163 which may rotate and move longitudinally therein due to its annular groove164 engaged by nose 165 of a plunger 166 mounted to move in a bore iin 167 parallel to bore 162 and urged by a spring 168 abutting on a screw 169. The end of the latch 163 extends in the body chamber above a notch 175 of elevator shovel 3 (Figure 6) while a transverse tooth 170 of said latch 163 projects into the path of barrel breech 11; therefore when barrel 10 and barrel breech 11 are in their normal position,` latch 163 enters its seat a ainst action of spring 168 While when said arrel and barrel breech recoil from their normal position after a shot fired, latch 163 cornes above notch 175 of elevator 3 under action of spring 168 (Figure 2).

An opening 171 is provided in the breech casing 9 (Figure 22) for ejection of the fired shell and at its rear end said breech casing 9 is closed by a transverse Wall 172 lined with a pad 178 adapted to damp the bolt shock thereon; said wall 172 leaves a bottom opening 173 and carries the holdingdown tooth 34 and inside it, at its rear end, is located a stationary tooth 174 intended to control the bolt lock 123.

In the sides of the breech casing 9 grooves 177 are provided in which lugs 120 of the barrel breech 11 and ribs 121 of bolt 12 are reciprocating (Figures 11, 16, 17, 22).

Finally the breech casing 9 has two rear wings 181 engaging recesses 182 of the standing breech 27 to improve the safety of the gun when barrel is in closed or down position (Figures 5, 7,10 and 22).

The operation of the gun is hereinafter described in respect of different conditions of use, the description of operation being made on the assumption that the gun is initi ally in the condition in which itis left after all magazine cartridges have been fired; in said position as hereinafter more fully described, the bolt is engaged at the rear end of its recoil stroke, with its closing spring 6 in compressed condition.

To load the gun the holding key 28 (Figures 1, 6, 7) is swung to carry notch 37 of its collar 35 in front to holding tooth 34 of the breech casing 9, and the assembly comprising barrel 10, casing 9, front stock 14-16 is swung around pivot 8. When the holding key 28'is being swung, recess 38 of its collar 35 is carried in register with stem 39 of latch 30 and said latch is made free to rise under raction of its spring 31 to lock said holding inafter described, that is with latch 57 in operative position, or after the magazine is exhausted, bolt 12 is held engaged at the rear end of its recoil stroke and barrel 10 ,is open for insertion of a cartridge therein; should bolt 12 be closed on account of a manipulation of the gun after the last shot fired, as assumed in Figure 5, operator acts on handle 132 and pulls it back, the arm 130 of said handle 132 being thus caused to act on tooth 129 of the bolt lock 123 (Figure 14) and to move down said lock to release its tooth 124 from its slot 114 in the barrel breech 11. By a further backward action on handle 132, bolt 12 is withdrawn from barrel breech 11 and it slides in the breech casing 9 to clear the rear mouth of barrel breech and barrel and then a cartridge may be inserted therein, the bolt 12 being thereafter again closed by hand. When the gun is in these conditions, operator fills or charges the magazine by introducing cartridges after each other thereinto, with their shell base backward, 'In the elevator shovel 3 which is held domi by spring 59-59 acting on the front face of cam 104 ofelevator arm 102, and then he drives them back into loading chamber 22 and magazine 2. During this operation the control knob 64 is to be held shifted back with respect to position of Fig. 6, that is: it is held in position of Fig. 5, to leave latch 57 free to extend into chamber 22 under the action of its spring 59 (Figs. 11 and 12).

During the magazine loading operation cartridges remove by their shell base temporarily the latch 57 which immediately comes again into its operative position to prevent the ma azine spring 23 from ejecting said cartri ges. The last cartridge is located in the elevator shovel 3 and it shifts by its side the blade 111 beyond lower edge 103 of elevator shovel which is thus released. Hammer 4 is in cocked position (Fig. 9) by effect of a previous shot or it may be cocked by hand.

Then the gun is closed by carrying breech casing 9 in its normal position (Fig. 1) on the body 7 and against standing breech 27 and in this operation the holding tooth 34 of the breech casing 9 acts on tooth 32 of latch 30 which is moved down and removes its stem 39 from holding key 28 to enable it to come into locking position under action of its spring 43, and carry collar 35 into engagement with notch 36 of tooth 34, while tooth 40 releases notch 75 of the head of plunger 5 and permits said plunger of moving forward under the action of spring 6 to act on bolt 12 and carry it into closed position. At the same time slope 73 at the end of the groove 72 yof the stem 71 of plunger 5, acts on tooth 94 of arm 92 (Figures 7, 8, 9) which thus releases arm 91 of sear 88 and then under the action of spring 77, hammer 4 moves forward through a certain angle (from position of Fi 9) towards side extension `152 of the str1 er and acts by its tooth 86 88 to carry its tooth 95 in conditlons to engage hammer tooth 85; hammer 4 is thus loc ed by tooth 95 in position of Fig. 8 while pawl 96 lies in front of the flat facet 86 of hammer tooth 86.

Assuming self-loading fire is to be made until the magazine is exhausted, knob 64 is carried in position of Figures 1 and 6 in which it removes latch 57, and then trigger 49 is actuated as usually after safety catch 51 released by manipulating knob and

parts

54, 53, 52 (Fig. 8) then trigger arm 50 acts on tooth 90 of sear 88 and causes said sear to move back to release tooth 95 thereof from hammer tooth 85, while pawl 96 is made inoperative due to compression of its spring 98, in this backward movement of sear 87-88, said pawl abutting on {lat face 86 of tooth 86. Thus hammer 4.is released and it acts on the side extension 152 of the striker head 151 and causes the cartridge to be fired by striker 13 and firing pin 150.

Owing to pressure of gases produced by the shot on the cartridge shell base and therefore on bolt 12, the barrel 10 recoils with the barrel breech 11, said bolt 12 being connected withbarrel breech 11 and barrel 10 by means of lock 123 having its tooth 124 abutting on face 125 of the slot 114 of the barrel breech 11; the recoil stroke (which begins from position of Figure 1) `is damped by the recoil spring 21 and bolt-closing spring 6 acted on by stem 71 of plunger 5 whose head abuts on the rear head 179 of bolt 12.

At the beginning of the recoil stroke of barrel 10 and barrel breech 1,1 together with the bolt 12, tooth 170 of latch 163 is released by the barrel breech 1l and then said latch moves back under action of its spring 168 to engage the elevator 3.

During the recoil stroke the bolt 12 acts by itsrear lower edge on the hammer 4 and carries it into its position in which it is entirely rocked backward; said hammer 4 is then held engaged (when released by the bolt during the forward stroke of the latter one) by pawl 96 of sear 88 because said sear is engaged in its lowermost position by the arm 92 which is enabled to move over arm 91 of scar 88 at the beginning of the recoil stroke that is immediatel the plunger 5 is moving back and its slope 3 has released tooth 94 of arm 92.

In the reciprocations of bolt 12 the handle 132 is held within opening 128 against pressure dof spring 139 which acts to move it downwar A little before the end of the recoil stroke, tooth 127 of the bolt lock 123 engages the release tooth 174 fastened on breech casing 9 and then said lock 123 moves down and its tooth 124 releases the barrel breech 1,1 which is thus left free to move forward with the barrel 10 under the action of recoil spring 21; on the contrary, bolt 12 after having further moved back through a certain extent under the action of gas pressure, is engaged by elevator at the rear end of its stroke as hereinafter described; durin the downward motion of the lock 123 its wings 134 act by their sloping faces 135 on sloping faces 153 ofstriker 13 and cause it to move back.

In the last portion of its own recoil stroke, bolt 12 acts, by its lower rear edge, on the front edge of the double pawl 105 and causes it to oscillate in the direction of the arrow in Figure 6, thus compressing spring 109 While, as above stated, the elevator 3-102 is locked at its front end by latch 163. Tooth 106 of pawl 105 is thus caused to engage'the lower notch 176 of bolt 12 and locks the bolt 12 in open position, because the double pawl 105 is prevented from moving back while front end of elevator 3-102 is prevented from rising, it being engaged by latch 163.

In the bolt recoil stroke, shutter 136 which projects backward with respect to the rear face of said bolt, engages the rear wall 17 2-17 8 of breech casing 9 and it moves forward against its spring 139 with respect to bolt 12 carrying it. f

The several parts are of Figure 2.

After the bolt lock 123 is released from abutment 125 of barrel breech 11, said breech barrel 11 and barrel 10 are moved forward 'bv spring 21 which acts on barrel collar 15 of firin gases together with bolt and barrel breech, 1s engaged with bolt by extractor 144 and at the end of the recoil stroke, when the bolt is engaged in its rearmost position as above described, it is in register wth the ejection opening 171 of the breech casing 9. When barrel breech 11 moves forward with barrel 10 after being released from lock 123, at the time the double claw of ejector 116 of the barrel breech is coming in register with eiector tooth 145 of the bolt, the fired cartridge shell receives, under combined actions of extractor 144 and ejector parts 116-145, a transverse action which releases it from exthus in the position tractor 144 and drives it outwardly through opening 171 (see Figure 3 wherein fired shell is shown in chain-lines) When barrel and barrel breech are again in normal position (Figure 4) they shift latch 163 from its position engaging elevator 3-102 to leave said elevator free.

Then the elevator shovel 3 is free to rise under the downward action exerted on the other end of arm 102 carrying it, by spring 6, plunger 5 and bolt 12 this bolt tending to move forward tooth 106 of the pawl 105; the abutment of other pawl tooth 107 on the lower face of said bolt 12 causes pawl 105 with adjacent end of arm 102 carrying it to move down, said arm 102 rocking around pivot 101 and lifting shovel 3 while spring 59-59 comes to act on the other facet of cam 104.

Due to this operation tooth 106 of pawl 105 releases notch 17 6 of bolt 12 which is thus free and moves forward under action of spring 6 to introduce the cartridge presented it by shovel 3 into the barrel chamber while the subsequent cartridge is moved forward by magazine spring 23 and is engaged by tooth 3 of the elevator shovel 3 (Figure 4).

In the last portion of its forward stroke, bolt 12 acts by its lower front edge on slo ing edge 102 of elevator arm and moves it down, and then the cartridge which was retained by tooth 3I of shovel 3 is enabled to enter said shovel.

Until the time bolt 12 has resumed its normal position (shown in Figure 1) its lock 123 is held down and rear facets of wings 134 of t-he saine lock the striker 13 back. Thereafter under the action of its spring 133 said lock 123 rises to lock bolt 12 in the barrel breech 11 by engagement of its tooth 124 in slot 114 of the latter one; at the same time it releases striker 13 while plunger 5 driving bolt forward, carries its slope 73 to act on tooth 94 of arm 92 and thus releases sear 88-91 which moves through first portion of its oscillation permitting hammer 4 of passing from position of Figure 9 into its normal position` shown in Figure 8 in which it is cocked and ready for firing, it being engaged in such position by tooth 95 (Figure 8).

Shutter 136 at this time has resumed its normal position and projects backward with respect to bolt to shut thel ejection opening 171 of breach casing which has a larger length than the bolt.

During the forward stroke of the bolt a double safety is secured because until said bolt is entirely closed and locked, striker 13 is engaged by lugs 134 of bolt lock 123 while sear 88 is locked by arm 92; on the contrary as soon as bolt 12 is closed and locked, arm 92 releases sear 88 and hammer 4 whch carries out the lirst ortion of its forward oscillation and is le free to actuate striker 13 on trigger 49 being operated, and further Wings 134 of lock 123 release striker 13.

Gun is thus ready for firing the fresh cartridge and so on, until the magazine is exhausted.

At this time after the last cartridge has been carried by elevator shovel 3 and bolt 12 into barrel chamber, blade 111 under action of its spring 113 moves over edge 103 of elevator shovel 3 and locks said shovel in its lowei'most position.

Then when the last cartridge is fired and bolt recoils, said bolt after having cocked hammer 4 is retained by pawl 105 because the front end of elevator shovel 3 is held down it being engaged by blade 111 in spite the barrel and barrel breech in their forward stroke after the ejection of the fired shell have made the latch 163 inoperative, the rear end of elevator arm 102 being thus prevented from moving down and releasing tooth 106 of the double pawl 105 from notch 176 of bolt 12; bolt 12 and plunger are thus held in their full recoil position in which the notch of plunger 5 is in register with tooth 40 of latch 30.

On the gun being opened at this time, the gun parts are found in the following conditions: bolt 12 is open, hammer 4 is cocked and the elevator shovel 3 is depressed, and therefore the gun may be loaded again in the described manner; elevator shovel 3 is released from blade 111 by action of the cartridge which is being located in the elevator hovel 3.

By the described gun a pair of su sequent shots may be tired and thereafter gun is left ready for being loaded with cartridges introduced directly into its barrel, or another pair of shots may be fired, or magazine cartridges may be tired in a continuous manner until the magazine is exhausted. This feature has the advantage that a supply of cartridges may be stored in the gun while fire being prosecuted with other cartridges, or cartridges different from those stored in magazine 2 may be used, according to requirements.

For such a purpose knob 64 is moved backward from position of Figure 6, to cause its tooth 66 to enter notch 67 of lever 62 and enable the end of this lever carrying tooth 68 `to move down and leave tooth 6l free of rising under action of spring 59, latch 57 being thus caused to project into loading chamber 22 (Figs. 11 and 12) to lock cartridges lying intermediate said latch 57 and the magazine spring 23; then after two cartridges lying respectively in the barrel chamber and in the shovel 3 have been tired, the magazine cartridges are prevented from moving forward and shovel 3 is left empty and locked by blade 111, the bolt 12 being'thus retained in open position as above described.

When gun is in these conditions, s hould operator desire to fire a further pair of cartridges derived from ma azine, knob 64 is carried into position of igure 6 to temporarily remove latch 57 and then knob 64 1s immediately restored back; by this manipulation twofirst cartridges of t e series are enabled to advance beyond latch 57 while the third one is left with the flan e of its shell base behind said latch, while ing free to transmit to two cartridges ahead it the pull of the magazine spring 23.

Then said two first cartridges move forward and the first one of them which is in loading chamber 22 passes on the shovel 3 and removes blade 111; elevator shovel 3 is thus left free and while engaging and retaining second cartridge by its tooth 3', it rises and releases bolt 12 which moves forward and introduces into the. barrel the cartridge presented it b elevator shovel 3 while at the same time said olt 12 movesthe elevator down to enable it to receive the second cartridge which has advanced past latch 57 during the advance of the first one at the time of the above described temporary manipulation of knob 64; as above stated the third cartridge of the series is engaged by its shell-case flange by latch 57 which is again in its operative position. f By repeating the described manipulation of knob 64 a further pair of cartridges may be fired and then fire may be stopped with gun bolt open.

Should it be desired to prosecute continuous fire with the magazine cartridges, knob 64 is left in position of Figures 1 and 6, latch 57 being thus held in inoperative position.

Of course the gun may be open at any time and fresh cartridges may be substituted for the cartridge located in elevator shovel 3 and also for that in the barrel; for such a purpose handle 132 which de ends from the bolt and barrel breech when he gun is open is moved v back. Then arm 130 of said handle 132 acts on tooth 129 of the bolt lock 123 and shifts said lock to release its tooth 124 from slot 114 of thebarrel breech 11 (Figure 5) and to cock striker 13. B a further backward action on handle 132, olt 12 is withdrawn from barrel breech and is caused to slide alon breech casing 9 into position shown in dotte lines in Figure 5, to clear the opening of the barrel breech and barrel, a fresh cartridge bein then introduced thereinto.

olt 12 is finally moved forward and it is safely closed by plunger 5 when this plunger is released from tooth 40 and moves under action of spring 6 at the time the barrel and associate parts are carried into down or closed position.

Fire shot by shot may also be effected by opening the gun after each shot fired, the gun being then found in the above described conditions.

By the described gun different ffire conditions may be secured, that is 1. Shot by shot loading and firing; then each shot gun is open and loaded by introducing a cartridge into barrel and then bolt is closed by hand in the described manner;

2. Continuous fire; then knob 64 is moved to release cartridge latch 57, and then magazine spring 23 drives forward the entire series of cartridges each of which comes in orward turn on the elevator shovel 3 with its front end abutting on'the front transverse face 7 of chamber body 7 while the subsequent cartridgev is stopped, when elevator shovel 3 rises, by the bottom projection 3 of said shovel; at each shot the described operation is repeated and cartridges existing in the magazine 2 are carried 1nto firing position after each other until magazine is exhausted;

3. Fire by pairs of shots with automatic rest of firing after each pair of. shots; for such a purpose knob 64 is manipulated, when required, to control the magazine latch 57; by this manipulation the third cartridge (beginning from the elevator shovel) wlnch lies in the loading chamber is stopped while the described operation is permitted in respect of two cartridges ahead of it.

It is thus possible, as described, to alternate magazine cartridges with other cartridges of different nature introduced each time in the barrel or in the elevator shovel, or a number of magazine cartridges may be stored within magazine and fire may be carried out with other cartridges.

The described elevator mechanism ensures a regular operation of the gun in spite of unavoidable differences existing in shot cartridges, because the position of each cartridge in the elevator shovel depends upon abutment of its front end against the transverse stationary 'front surface 7 of body 7 (Figure 7). Therefore the elevator shovel is caused to act under several cartridges always at the same distance from their front edge whatever is their total length and as the weight of front` ortion of cartridges which contains shot is t e predominating factor of their balance, they are always well balanced on elevator shovel and therefore in condition to be correctly introduced into barrel.

On `the other hand bolt 12 is locked by the elevator until a cartridge is in proper position to be introduced into barrel and any e jamming of the gun is prevented.

The described trigger gear has the advantage that hammer is enabled to carry out an extensive stroke as required to entirely rock it back for permitting the backward bolt stroke while the hammer operative stroke at the time of firing is reduced without the trigger tooth controlled by sear and trigger being subject to heavy impacts.

In fact after the backward hammer oscillation, said hammer is moved forward through an extensive extent and it is stopped in this stroke by pawl 96 of sear 88-87 which absorbs the impact of the stop action; after the bolt is closed arm 92 is released to permit hammer 4 to take up cocked and fire-ready position, without tooth 95 engaging it in this position be subject to a heavy impact at the time hammer 4 is stopped.

Thus the tr` ger tooth 95 is preserved and the stroke ma e by hammer at the time the trigger is actuated is shortened to minimize the time elapsing between the action on trigger and the striker operation.

The release of bolt from the barrel breech and barrel a little before the cnil ot' recoil stroke of said bolt to enable bolt to move further back under action of tiring gases While barrel and barrel breech are initiating their forward stroke under action of recoil spring 2l, secures the advantage that a correct ejection of fired shell is ensured under any condition, said shell being driven off from the barrel by the pressure of tiring gases acting on the bottom of its shell.

The described gun may be taken apart in a very easy manner, without use of any implement or tool, being sufcient to manipulate knob 160 to release stock-carrier 16, and then the assembly comprising breech casing, barrel breech, barrel and bolt is immediately released from hinge pivot 8; to remove barrel with its breech from breech casing nut 14 is removed from rod 14 and head 170 of latch 163 is shifted aside, bolt being then able to be 'emoved from breech and entirely dismantled.

An entirely free access to elevator and trigger devices is also provided.

What I claim as my invention and desire to secure by United States Letters Patent 1s 1. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; an elevator, a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in 'said breech casing, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, and barrel recoil return means on said breech casing.

2. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt-closin means in said body; a breech casing hingedg on said body, a barrel and a barrel breech mounted to reciprocate in said breech casin an elevator mounted to oscillate in said ody to and from the mouth of said magazine and barrel breech, a. bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casin and cooperating means on said elevator and olt to cause said elevator to su ply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech.

3. An automatic shot gun comprising a butt-end; a body and a vmagazine solid with said butt-end; a trigger and hammer gea-r and bolt closing means in said body; a breech casin hinged on said body, a barrel and a barre breech mounted to reciprocate in said breech casing; an elevator mounted to oscillate in said body to and from the mouth of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, and cooperating means on said elevator and bolt to retain said bolt spaced from said barrel breech at the end of its releasing and clearing stroke and to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech.

4. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing; an elevator mounted to oscillat-e in said body to and from the mouth of said magazine and barrel breech, a boltl mounted to reciprocate in said barrel breech and breech casing, bolt lockng means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, and elevator retaining means under control of said barrel, said retaining means being made operative on barrel and bolt beginning their recoil stroke and being made inoperative when barrel is in its normal position.

5. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing; an elevator mounted to oscillate in said body to and from the mouth of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means on said elevator and bolt to retain said bolt spaced from said barrel breech at the end of its releasing and clearing stroke and to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, and means to engage said elevator in its inoperative and bolt-retaining position when it is empty.

6. An automatic shot gun comprising a vbutt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel anda barrel breech mounted to reciprocate in said breech casin an elevator mounted to oscillate in said ody to and from the mouth of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech 6 bolt closing means 1n said l magazine and barrel breech, a bolt and breech casing, bolt lockin means and a striker in said bolt, barrel recoi return means on said breech casing; cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, elevator retaining means under control of said barrel, said retaining means being made operative on barrel and bolt beginning their recoil stroke and being made inoperative when barrel is in its normal position, and means to engage said elevator in its inoperative and bolt retaining position when it is empty.

7. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt-closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing; an elevator mounted to oscillate in said body to and from the mouth of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, and means on said elevator to retain a cartridge being fed from magazine at the time said elevator moves to supply a cartridge to said bolt and barrel breech.

8. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing; anel'evator mounted to oscillate in said body to and from the mouth of said magazine and barrel breech,4 a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel reco-il return means on said breech casing, and cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, said elevator comprising a shovel oscillating to and from positions in front of magazine mouth and barrel breech and engaging a shot cartridge under its front shot-containlng region.

9. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing; an elevator mounted to oscillate in said body to and from the mouth of sai mounted to reciprocate in said barrel breech and breech casin bolt locking means and a striker in sai bolt, barrel recoil return means on said breech casing; cooperating means on said elevator and bolt tocause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, said elevator comprising a shovel oscillating to and from positions in front of magazine mouth and barrel breech and engaging a shot cartridge under its front shot-containing region, and said body providing a cartridge abutment at an invariable distance from cartridge engaging portion of said elevator shovel.

10. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a. barrel breech mounted to reciprocate in said breech casing; an elevator mounted to oscillate in said body to and from the* mouth of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, and a spring member and a two-facet cam on saidl body and elevator to resiliently hold said elevator in either of its cartridge receiving and supplying positions.

11. An automatic shot gun comprising a butt-end; a body and a magazine solid with said buttend;`a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing; an elevator mounted to oscillate in said body to and from the mouth of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking meansv and a striker in said bolt, barrel recoil return means on said breech casing, and a two teeth pawl on said elevator, one of said pawl teeth engaging said bolt to retain it in full recoiled position and receiving an elevator-lfting action from said bolt, and the second one of said teeth cooperatin with said bolt to release said first name tooth from said bolt after the elevator has been lifted.

12. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and' bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casin an elevator mounted to oscild late in said ody to and from the mouth of said magazine and barrel breech, a bolt Abarre release said bolt from said a striker in said bolt,

mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, and a sloping facet on said elevator acted on by said bolt to clear said elevator from bolt path after the front end of a cartridge has entered said barrel breech.

13. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; an elevator, a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on saidbreech casing, a catch in said magazine adapted to stop the cartridge feed and means outside said magazine for manipulating said catch.

14. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; an elevator, a trigger and hammer ear and bolt closin means in said body; a reech casing hin Von said body, a barrel and a barrel breech mounted to reciiprocate in said breech casing, a bolt mounte to reciprocate in said barrel breechA and breech casing, bolt locking means and a striker in said bolt, barrel recoil return Pmeans on said breech casin a catch in said magazine adapted to stopt e progression of a cartridge lying in said magazine and vready to be receive on said elevator, and means outside said magazine for manipulating said catch.

15. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casin hinged on said body, abarre'l and a breech mounted to reciprocate in said breech casing, an elevator mounted to oscill 'late in said body to and from the mouths of said magazine and tbarrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt release ably engaging it with said barrel breech, andV said lock to arrel breech before the end of recoil stroke of said bolt,

and barrel recoil return means on said breech casing.

' 16. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech hinged on said body, a'barrel and a a stationary member actuating casin bai-rel breh mounted to reciprocate Vin said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a. bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt releasably engaging it with said barrel breech, a stationary member actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, a striker in said bolt, cooperating means on said lock and striker to cock said striker when said lock is actuated, and barrel recoil return means on said breech casing.

17. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, abarrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt releasably engaging it with said barrel breech, a stationary member actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said. bolt, a striker in said bolt, cooperating means on said lock and striker to cock said-striker when said lock is actuated and to safety-engage said striker when said lock is in bolt releasing position, and barrel recoil return means on said breech casing. g

18. An automatic shot gun comprising a butt-end; a body and a magazine Ysolid with said butt-end a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevatormounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt releasably engaging it with said barrel breech a stationary member actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, a striker in said bolt, means for hand-operat ing said lock and bolt, a s ring member resiliently holding said han -operating means in a position extending from said bolt, and

barrel recoil return means on said breech casing.

19. An automatic shot gun comprising a 'butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closi means 1n said body; a breech casing hing on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said-body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech ably engaging it with said barrel breech, aV

and breech casing and having a slot, a slotted lock and a lock manipulating handle in said bolt slot, a striker mounted to reciprocate through said slotted lock, said lock releasably engaging said bolt With said barrel breech, cooperating striker cocking means on said lock and striker, a stationary abutment on said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, a striker in said bolt, and barrel recoil return means on said breech casing.

20. An automatic shot gun comprising a butt-end; a body and a ma azine solid with said butt-end; a trigger and ammer gear and bolt closin means in said body; a breech casing hinge on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate lin said barrel breech and breech casing, a lock in said bolt releasably engaging it with said barrel breech, a stationary member actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, a striker in said bolt, a shutter for shell ejecting barrel breech opening mounted to reciprocate along said bolt, a spring causing said shutter to extend from said bolt, and barrel recoil return means on said breech casing.

21. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt releasably engaging it with said barrel breech, a stationary member actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, a striker in said bolt, a shutter for shell ejecting barrel breech opening mounted to reciprocate along said bolt, a lock manipulating handle, cooperating means on said handle and shutter and a spring causing said shutter and handle to extend from said bolt, and barrel recoll return means on said breech casing.

22. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear and bolt closing means in said body; a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt releasstationary member actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, a striker in said bolt, a shutter for shell ejecting barrel breech opening mounted to reciprocate along said bolt, a lock manipulating handle, a shell case extractor in said bolt, cooperating means on said handle and shutter and a spring causing said shutter and handle to extend from said bolt and holding said extractor in operative position, and barrel recoil return means on said breech casing.

23. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear in said body; a plunger mounted to reciprocate in said body and a spring actuating said plunger; a breech casing hinged on said body, a barrel and a barrel breechI mounted t0 reciprocate in said breech casing, an elevator mounted to oscillate in said body, to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, said bolt being actuated by said spring plunger, bolt locking means and a striker in said bolt, barrel recoil return means oli said breech casing, and cooperating means on said elevator and bolt to cause sai-d elevator to supply a cartridge from said magazine to said .barrel breech after said bolt has cleared said barrel breech. 4

24. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear in said body; a plunger mounted to reciprocate in said body and a spring actuating said plunger; a breech casing hinged on said body, means locking said plunger in retracted position and plunger-spring*l compressed position on said breech casing being swung off from said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, said bolt being actuated by said spring plunger, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, and cooperating meanson said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech.

25. An automatic shot gun comprising -a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear in said body; a plunger mounted to reciprocate in said body and a sprin actuating said plunger; a breech casing inged on said body, a breech casing holding down key, means locking said holding down key in open position and said plunger in retracted position and plunger-spring compressed position and breech casing,

on said breech casin being swung of from said body, a barre? and a. barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted `to reciprocate in said barrel breech and breech casing, said bolt being actuated by said spring plunger, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, and cooperating means on said elevatorand bolt to cause said elevator to supply a cartridge from said magazine to said arrel breech after said bolt has cleared said barrel breech.

26. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a trigger and hammer gear in said body; a lunger mounted to reciprocate in said b y and a spring actuating said plunger;a breech casing hinged on said body a reech casin holding down key, means ac uated by sa1d breech casing for locking said holding down key in open position and said plunger in retracted position and plunger-spring compressed position on said breech casing being swungoff from said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths ofv said m` gazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, said bolt being actuated by said spring plunger, bolt locking` means and a striker in said bolt, barrelrecoll return means on said breech casing, and cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech.

27. An automatic "shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a spring urged bolt closing plunger in said body, a trigger, sear and hammer gear on said magazine, a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the Imouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, and cooperating means on said elevator and bolt to cause said elevator to supply a cartrid e from said magazine to said barrel breec after said bolt has cleared said barrel breech.

28. Anautomatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, a spring urged bolt closing plunger in said body, a trigger, sear and hammer gear on said magazine, sear locking means actuated by Said plunger to release said sear when said bolt is closed, a breech hinged on said body, a barrel and a barre breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, and cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech.

29. An automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a spring urged bolt closing plunger in said body; a trigger, sear and hammer gear on said magazine, a breech casing hinged on said body, breech mounted to reciprocate in said breech casin an elevator mounted to oscillate in said ody to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, said bolt cooking said hammer in its recoil stroke, two airs of cooperating teeth on said sear and ammer one of said pairs comin into engagement'on said hammer being re eased by said bolt when this bolt starts its forward return stroke and the second pair of teeth stopping said hammmer in cocked position.

30. Anautomaticshotguncomprisingabuttend; a body and a magazine solid with said butt-end; a sp g urged bolt closing plunger in said body; a trigger, sear and hammer gear on said magazine, a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said b reech casing, an elevator mounted tof/oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means .on said elevator and belt to cause said elevator to supply a cartridge casin from Said magazine to said barrel breech a er said bolt has cleared said barrel breech, said bolt cooking said hammer in its recoil stroke, two pairs of cooperating teeth on said` sear and hammer one of said pairs coming intoV engagement on said hammer being released by said bolt when this bolt starts its forward return stroke and the second pair of teeth stopping said hammer in cocked posi tion, a member locking said sear and hammer with first tooth pair in engagement and coo erating means on said plunger to remove said a barrel and a barrel locking member on said bolt being in fully closed osition.

31. n automatic shot gun comprising a butt-end; a body and a magazine solid with said butt-end; a spring urged bolt closing plunger in said body; a trigger, sear and hammer gear on said magazine, a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared `said barrel breech, said bolt cooking said hammer in its recoil stroke, cooperating tooth and pawl on said sear and hammer, and a pair of cooperating teeth on said sear and hammer, said tooth and pawl coming into engagement on said hammer being released by said bolt when said bolt starts its forward return stroke and said pair of teeth coming into engagement to stop said hammer in cocked position.

32. An automatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, a spring urged bolt closing plunger in said body, a trigger, sear and hammer gear on said magazine, a breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casin cooperating means on said elevator and bo t to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, said bolt cooking said hammer in its recoil stroke and said hammer having a recess and two teeth on the sides of said recess, an arm on said sear entering said hammer recess, a pawl on said arm engaging one of said teeth on said hammer being released by said bolt when said bolt starts its forward return stroke and a tooth on said arm engaging the second one of said hammer teeth after said first named tooth has been released from said pawl due to sear oscillation produced by said hammer, to in cocked position. v

33. An automatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, a trigger and hammer gear and bolt closing means in said body, a breech casing, a pivot and a surface concentric therewith m said body, a hook on said breech casstop said hammer ing engagingsaid pivot, a rod solid with said hook, a stoc carrier engaged with said rod 'and having a shoe hinge-embracing said surface, a barrel and a barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, and cooperating means on said elevator and bolt t'o cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech.

34. An automatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, a trigger and hammer gear and bolt closing means 1n said body, a breech casing, a pivot and a surface concentric therewith in said body, a hook on said breech casing engaging said pivot, a rod solid with said hlook, a stock carrier having a shoe hinge-embracing said surface, a sliding claw on said stock carrier engaging said rod, a spring holding said claw 1n rod-engaging position, a barrel and a barrel breech mounted to reciprocate in said breech casing', an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing, and cooperating means on said elevator and bolt to cause said elevator to supply a cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech.

35. An automatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, a trigger and hammer gear and bolt closing means in said body, a breech casing hinged on said body, a barrel anda barrel breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouths of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt releasably engaging it with said barrel breech, and a stationary abutment on said breech casing actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, a striker in said bolt, and barrel recoil return means on said breech casing. n

36. An automatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, a trigger and hammell gear and bolt closing means in said body, a. breech casing hinged on said body, a barrel and a barrel breech mounted to reciprocate in said breech casin an elevator mounted to oscillate in said odyY to and from the mouths of said magazine and barrel breec a bolt mounted to reciprocate in said barrel breech and breech casing, a lock in said bolt releasably engaging it with said barrel breecli, and a stationary abutment on said breech casing actuating said lock to release said bolt from said barrel breech before the end of recoil stroke of said bolt, at a point of recoil stroke where frin gases have a pressure adapted to eject t e fired shell from said 1 barrel, a striker in said bolt, and barrel recoil return means on said breech casin 37. An automatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, an elevator, a trigger and u hammer gear and bolt closing means in said body, a breech casing hinged on said body, a barxrel and a barrel breech mounted to reciprecate in said breech casing, said magazine being at the rear of said barrel and carao tridges therein being fed in the direction from said butt-end towards the barrel muzzle, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, and barrel a5 recoil return means on said breech casing.

38. An automatic shot gun comprising a butt-end, a body and a magazine solid with said butt-end, a trigger and hammer gear and bolt closing means in said body, a breech casing hinged on said body, a barrel and a barre breech mounted to reciprocate in said breech casing, an elevator mounted to oscillate in said body to and from the mouth of said magazine and barrel breech, a bolt mounted to reciprocate in said barrel breech and breech casing, bolt locking means and a striker in said bolt, barrel recoil return means on said breech casing cooperating means on said elevator and bolt to cause said elevator to supply a. cartridge from said magazine to said barrel breech after said bolt has cleared said barrel breech, said elevator comprising a shovel oscillating to and from positlons in front of magazine mouth and barrel breech and engaging a shot cartridge under its front shot-contalnmg region, sai body providing a cartridge abutment at an invariable distance from cartrid engaging portion of said elevator shove and a spring in said 5o magazine pushing cartridges towards said abutment. p

In testimony whereof I have signed my name to this specification.

RODOLFO CDSM.