US1004424A - Automatic firearm. - Google Patents

Description

' 15.9. HBNNICK. AUTOMATIC FIREABM.

APPLIU4TION FILED HOV. 4, 1909.

Witnesses.

Patented Sept. 26,1911.

2 SHEETS-SHEET 2.

DL' G. HBNNICK. AUTOMATIC PIREARM. APPLICATION FILED NOV. 4, 1909.

" UNITEDSTATES I anhin; e. nnzmrcnor ilmenau., emunio, CANADA.'

AUTOMATIC Hannan.

Syndication `of Lettori Patent. Appmaaon mea November 4', 190e. seran No., 52am.

Patented Sept. 26, 1 911.

n To all whom it may concern.

Be it'known that vI, DANIEL G.,HENNIC1 a subject of the King of Great Britain, an resident of Mitchell, in the county of Perth, o in the .Province of Ontario,` in the Dominion of Canada, have invented certain new and useful Improvements in Automatic Firearms, of which the followingis a speclcation. 1

1o i The invention relates to improvements in -automatic fire arms, as described in the following lspecification and illustrated 1n the accompanying drawings that form part of the same; Y

16- The'invention consists essentially 1n the novel construction and arrangement of parts; whereby the breech mechanism 1s oprerated automatically tojeject the shell and reload immediately following the firing by 20a spring operated mechanism actuated byl the gases of the explosion and whereby the firing may be operated either singly or in automatic succession.

The objects of the 'invention are to devise 25' an automatic fire-arm which may be operatedto fire singly or in automatic succession,- of simple and neatconstruction, easy to operate and positive and safe in its action.

In the drawings, Figure 1 is a perspective 30- viewl of my device showing the stock and barrel broken away.v Fig. 2 isa longitudi nal sectional perspectiveview showing some of the parts broken away. Fig. 3 is an enlarged perspective view ofthe breech andr 55 hammer mechanism partly .broken away.

Fig. 4 is a vertical cross sect-ional view` "through the breech block and the receiver showin c the. means for' locking the saidl lock. Fig. 5 is an enlamged'per-` j breech lspective, View of the breech block shown partly broken away and disclosing the ring pin. Fi .,6 is an enlarged side elevational view of t`e tri ger and hammer mechanism. Fig. 7 is an en arged plan view of the trigger showingv the pawlI for operating the hammer scar. Fig.v 8 is a sectional. view l through4 the hammer on the line -y Fig. 6.

Like numerals of reference-indicate corresponding part-s in each ligure.

0y Referring to the drawings, 1 is the barrel i of the rifle secured in the receiver 2 in the usual manner. v 3 isa cylinder secured to'the underside of l the barrel 1 at the rear end thereof,said cylu end adjacent to the receiver closed.

4 is a small orice through the barrel 1 formin a communicating passage between lthe-sai barrel and the rear end of the c linder 3 land adapted to conduct a portion 60 of the gases of the explosion from said barrel into the said cylinder. y 4

5 are orifices bored diagonally through the wall ofthe cylinder 3 and'opening into-thel 6 is a blockhaving a dove-tailed portion 7 secured in the dove-tailed slot `8 formed in the underside of the barrel 1 toward its for-r ward end, said block having a horizontally said orifice tapering toward the rear end o the barrel. 10 is a notch cut in the underside of the barrel 1 a Ishort distance forward of thewardly and forwardl v 11 isa tapered bushing fitting within the tapered orifice 9 inthe block 6.and having an upwardly extending lug portion 12 fit- 13 is a hand grip formed hollow and open at the upper side and fitting snugly against the underside of the barrel 1, the rear end bein held securely bythe sprin cli 14 whic clips aroundlt-he outer si e o the 85 cylinder 3.

15 is a metal bushing secured in the forward' closed end of the grip 13 and arranged in central alinement with the cylinder 3 and ting the bushing 11.

16 is a piston operatin .in the ,cylinder 3 and having the piston ro 17.extending forwardly therefrom. The front end 18 of the piston rod 17 is slight-ly reduced and extends 9'5 through the bushings y11 and 15 and is threaded at its outer eXt-remityand formed with a narrow slot 19,l in the end thereof.

' 20 is a nut secured on 'the threaded end of the grlp 13, said nut having a longitudinalslot 21 at its front end.

of the nut and folding snugly thereinto,

wardly to facilitate the turning of the nut inder having 'its forward vend open and the 65 said cylinder adjacent to its forward end. vl i arranged tapered orifice 9 therethrough 70 4dove-tailed slot 8, said v'notch sloping up- 7 5A ting into the notch 10.

the tapered bushing 11, the rearend ahnt 18 of the piston rod 17 and abutting the end 100 .22 is a leaf secured in the slotted front end said leaf being adapted to be yswung out- 23 is--a spiral compression lspring encir-4 cling the'piston rod 17 and at its rward y end abutting the tapered bushing 11.

24 is a collar encircling thepiston rod4 17 intermediate of its length and rigidly secured thereto so that the rear end thereof is arranged adjacent to the forward end of the cylinder 3 when' the nut 20 abuts the forward end of the grip 13.

25 is a rod 'ixedly secured to or'forniing. v. part with the ferrule 24 and extending rearwardly from the side thereof andoEset upwardly and outwardly at 26, Vas shown in dotted lines in Fig. 2, the portion beyond the offset extending parallel with the forward portion and having an inward offset 27 toward 4its extremityl and also an inwardly projecting portion 28 at its extremity. j The inwardly projecting portion A28 extends downwardly rod and its forward edge is beveled from its outer face inwardly and the rearedge of the said projection is beveled downwardly and forwardly. The receiver 2 is formed with a longitudinal slot 29 in one side thereof adapted to receive the offset end 27 of the rod 25, .the said slot extending from the forward end of the said receiver to a 'point adjacent to the back. v`

30 is a block rigidly secured to or forming part with the receiver 2 and extending inwardly at the back end of the slot 29.

31 is a longitudinal dove-tailed recess formed inthe outer wall of the receiver 2 and extending on each side of the slot 29 and parallel therewith for the major portion of its length.

32 is a slide formed with a dove-tailed inner side adapted to slide into the dovetailed recess 31 and having a rectangular shaped slot 33 in its inner side, said slot forming a guide for the squared rod 25.

34 is a pin extending outwardly from the side of the receiver 2 and spring held and a notch 35 in the under edge of the slide 32, said pin "locking said slide securely in position.

The receiver 2 is open at the top for the major ortion of its length and the sides thereof are formed with the ledges 36 on the inner side extending froml end to end thereof a short distance below the top.

37 are flanges projecting inwardly from the sidesA of the receiver 2 above the ledges 36 and forming .the longitudinal grooves 38,

said iianges extending backwardly from the forward portion of the opening in said receiver for about one half of its length.

39 is a breach block having the longitudinal side flanges 40 extending from end to end of the top thereof,l said flanges resting below the underside of the said -39 arranged centrally above the orifice 41 upon the ledges 36 and sliding in the grooves 38.

41is a circular orifice. extending through the breech block from end toA end thereof lliaving the enlarged portion 42 at the rear end.

-43 isthe firing pin slidably arrangedin the` orifice 41 Vand having an enlarged end 44 within the enlarged portion 42 of the orifce. 41,7said enlarged end having a notch 45 formed in itsupper side.

-46 is a in secured iii the breech'block and exten ing across the enlarged portion of thev orifice 42 and through the notch 45 and securing the firing pin in place, the length of the notch allowing for the longitudinal movement of the, said firing pin.

47 is a spiral compression spring encircl'ing the firing pin and arranged between the shoulder formed by its Aenlarged end and the shouLlder formed by the enlarged poriton of the orifice 41.

48 is a circular orifice in the breech block and extending parallel' therewith throughout the major .portion of the length of the said breech block. V l

49 is a circular rod extending through the vorifice 50 in the reariend of the receiver 2 and into the circular orifice 48 in the breech block 39, said rod having a head 51 at its rear end and a notch 52 formed in one side .thereof adjacent to said head.

53 is a'pin arranged in the vertical orifice 54 in the rear end of the receiver 2, said pin extending into the notch 52 in the rod 49 and holding it securely in place.

55 is a notch formed in the pin 53 and so arranged that, on the depression of said pin in its orifice the rod 49 may be withdrawn. 56 is a spiral spring Ainclosed within the orifice 54 and holding the pin 53 in engagement with the rod 49. 1

57 is a spiral spring encircling the rod 49 between the inner side of the end of the receiver 2 and the back end of the breech block 39 and adapted to Areturn the breech block to its forward position following its rearward movement.

The rod 49 `is removably secured in place breech block the pin 53 is depressed until the notch 54 is brought into alinement with rthe rod 49 and said rod withdrawn. The lspring may then be taken out and the breech .block moved backwardly until lthe flanged portion clears the anges 37 lofthe receiver. The block may then be lifted out of the receiver.-

58 are longitudinal slots formed in the inthe ledges 36 and closed in at one end by the inwardly projecting flanges 59.

vner wall of the sides ofthe receiver 2 above neuem.

' -60 are notches cut in the upper edges ofv the outer. walls of the receiver'2 toward the front end and having the forward portions thereof beveled outwardly and upwardly.

61 is the breech cover adapted to rest upon the top of the receiver 2 and closing in the same, the said cover having theV downwardly extending inwardly flanged lugs 6 2 at the forward end adapted to extend into the notches 60, said lu to correspond wit the -beveled forward portions of'the'said notches. The rear por- -tion of the breech cover 61 is out inwardly .and formed with outwardly extending flanges 'from the lower portion Aadapted to drop into the slots 58 and on being'moved forward to engage: .the flanges 59, the said cover bein thus eld securely from liftin upwardly y the flanges and dove-taile portions.

63 is a hole in the rear end of the cover 61 into which, the spring in 53 extends when lill the cover is slid forwar said pin locking the cover securely in place.

' 64 is a fiat leaf spring xedly secured to 4 the underside of the cover 61 and resting upon the top of the breech block, said sprlng -being adaptedto hold the cover from rattling and particularly to vguide the cartridges into the barrel as hereinafter more fully explained.

65' are vertical slots formedl in the side walls of the receiver 2 intermediate of the length thereof and extending from the top downwardly.

66 is the breech lock slidably arranged between the side walls of the receiver 2 having the side extending portions 67 project- -ing into the vertical slots 65 and sliding therein.

68 is a projection extending upwardly from one side of the lock 6 6 into a notch 69 formed in `one side ofthe breech block 39. 70 is a cross bar forming part with the receiver 2 and extending between the sides thereof below the lock 66.

71 is a pin secured in the cross bar 70,

and extending upwardly into an orifice in the bottom end of the lock 66. y

72 is a spiral spring encircling the pin 71 and holding the lock 66 into engagement with the .breech block 39.

73 is a notch formed in the lock 66 on the i side opposite to the projection 68, the bottom of said notch extending below the lowf ermost corner of the beveled portion 28 .of the rod 25 and extending inwardly a sulficient distance to allow said portion 28 to .pass the saidlock.

74- is a recess formed in the front side of the lock 66 adjacent to the notch 73.

75 is a dog pivota'lly secured at the lower end of the recess 74 and spring held outwardly by a flat spring 76, the latter being having beveled edgesA 'a recess 77n form secured in a suitable recess formed in the" front face of the lock 66. The side of; the

dog adjacent to the slotted side ofthe ref,v vceiver is cut away slightly. to allow the assage of the beveled portion 28 of the ro 2 5 and the upper end of said do is beveled upwardly on the front side. n the forward movement 'of the rod 25 thefront beveled vedge of the inwardly extending portion 28 of said rod engages said dog and swings it laterally upon its pivot, said portion 28 -passing through the notch 73 in the lock 66. lThe dog7 5 springs in behind the member 28 i and on the return movement of the rod 25 the back and' under beveled side ofv theextension 28 engages the beveled upper edge of the said dog and forces the lock 26 downwardly. The bolt portion 68 of said lock is thus'l withdrawn from engagement with the breech block. t

'(7 is a latch orupawl pivot-ally secured in block adjacent to the slot. 29,' said pawl having the downwardly extending catchportion 78 adapted to engage the rearward edge or corner of the inward extension 28 inthe sideof the breech n from the rod 25, said pawl being spring held Y downwardly by a suitable fiat sprin 77b secured in the recess 7 7a. The rod 25 1n its backward movement, that is toward the butt lendof the a m, withdraws the lock 66 from the breech b ock 'and immediately following the withdrawal of the block the rearmost pointvof the projection 28 engages the pawl 77 and draws the breech. block backwardly. Thel rearward movement of the arm car ries the breech block and' pawl 77 backwardly until the said pawl comes in contact With 'thc stationary block 30. The rear or inner end of the pawl 77 is beveled :downwardly and forwardly and as the beveled edge'of the said pawl engages the block 30. e

the said pawl is forced upwardly until freed from `the inwardly extending catch portion 28 of the rod 25. Immediately on the release of the pawl 77 from the member 28 the spring 57 returns the breech block to its forward position. l

79 is a'spring dog secured to one side of the breech block 39 and having the notched?y 79 and.. varranged mid-.way between the y.

pins 81'.

t 83 is a pin fixedly 'secured in the side of the receiver 2 and extending into the slot 84 is an opening through thc side of the receiver' ,2 adjacent to the dog 79 in the breech block. The vspring dog 79 engages the flange of the cartridge as it rests within the chamber of the barrel and on the backward movement of the block, withdraws the 5 -shell from the said chamber holding said shell'securely until it comes` in contactI with the pn 83 and as the movement of the block is very fast, the pin impacts sharply against the shell and throws it clear of the 1o spring dog, at the same time said dog gives n). the shell a side tilt which causes it` to be ejected through the 'side opening 84.

85 is the stock having a bifurcated pdrtion 86 on the upper side adapted to be secured to the rear end of the receiver 2 by athumb screw 87 threaded'into a suitably threaded orice in said receiver. 4The bifurcated portion 86 forms part with a metal frame 88 secured to the stock and extending forwardly on the underside and engaging the cross bar 70 at the forward end, the side portion 89 being notched to receive the said cross bar.

90 is the trigger'guard forming part with the frame 88. Y I91 is the trigger extending through a slot 92 above the trigger guard 90.

93 is a forward extension from the trigger 91, said forward extension having the forward end resting upon the cross bar 70 and adapted to slide back and forth thereon.

94 is a notch formed in the underside. of the forward extension 93 of the trigger 91.

95 is the trigger spring arranged between the lug 96 from the frame 88 and the lug 97 projecting downwardly from the trigger 93. s l

98 is a lug rigidly .secured to or forming part with the side wall portion of the frame 88 and having a central circular orifice therethrough.

99 is a swinging guide bracket substantially L-shaped in form and pivotally secured to the lug 98 above the orifice in said Alug, said swinging bracket having an orifice therethrough corresponding with the orifice in the lug 98. The lower laterally turned portion of the bracket 99 engages the upper rear side of the trigger 91 and forms a guide therefor holding the said trigger in place.

l 100 is a latch member pivotally secured intermediate of its length tc the upper side `of the trigger 91 and having a forwardly projecting hook shaped portion 101, said hook shaped portion having its front edge beveled backwardly and the top surface of said hook Jshaped portion beveled downwardly and rearwardly.

102 is a spring having one end secured in the trigger and looped 'around a vsuit-able pin or screw 103 and secured in the back end of the trigger and extending forwardly and pivotally secured to the rear end of the pivotal latch member 100.

104 is the hammer pivotally supported on the pin 105, the lattei` being secured in the permanent side of t1 e fra-me 88 saidhammer being adapted to strike the outer protruding end of the firing pin 43.

106 is a rod'pivotally secured to the ham- .mer 104 and extending through the holes in the brackets 99l and lug 98' and sliding thereon.

107 is a spiral spring encircling the rod 106 and abutting the bracket 99 at one end and a shoulder formed on the rod 106 at the other end and exerting a forward push on said rod to swing the hammer on its pivot.

108 is the sear pivotally supported on a screw 109 the latter being secu-red in the 'side walls on the trigger frame, said sear having its forward portion adapted to en-- gage the bent 110 in the hammer 104'to hold the said hammer in its cocked position.

111 is a flat leaf spring secured to the upper side of the forwardly extending portion of the trigger and bearing against the under side of the sear 108 holding said Sear in coract with the rounded bottom portionof the hammer. The rear end of the Sear 108 extends over'the hook shaped end 101 of the latch and has a downwardly projecting spur 112 having a. rearwardly inclinedforward edge, said spur beingadapted to engage the hook end of the latch member 100. The pulling of the trigger moves the whole trigger member rearwardly against the spring 95.l The rearward move- 100 ment brings the hooked end of the latch 4100 into engagement with the-forward sloping edge of the spur 112 extending downwardly from the sear 108 and tilts said sear on its pivot swinging the forward end downwardly and withdrawing it nfrom the bent in the hammer, thus releasing the said hammer and allowing it toy swing forwardly to strike the iring'pin. The spring 95 returns, the triggerto lts normal position immediately it is released. As the trigger moves forwardly the forwardly sloping edge of the latch 100 engages the straight rear edge of the spur 112 from the sear 108 and said latch swings sidewise on its pivot and passes the said spur, the hooked end of said latch swinging back into its place in front of said spur as soon as it clears the same.

113 is a pivotal cam member secured to the side of the trigger 91 having a slopinginner 120 side adapted to engage'the sloping portion 114 of the latch 100. (The cam 113 in its normal position rests ina recess in the side of the trigger but when the lower end is swung forwardly the upper beveled portion engages the latch 100 and swings it on` its pivot moving the front hook shaped end to clear the spur 112 of 'the sear 108. The trigger mechanism is thus rendered inoperative and the discharging of the arm by the 13# accidental lfram-e, extends, said' spring lifting up? wardly on said pin.

118 isa cam lever pivotally secured to the bottomv endof the pin 115 beneath the frame 88, said lever being adapted to be swungl v downwardly and outwardly to allow the spring 117 to lift the pin 115. The pin 115 in its raised vposition engages the shoulder 119 formed by the cross notch 94.in the trigger 91. In this position, that is to say, with the i, shoulder 119' abutting the end of theY pin 115,

the hooked end of the latch 100 does not clear theY spur 112 but holds the sear tilted out 4'of engagement with the hammer so loIi-g as the trigger is held.-

120 isr a pivotal stop member secured in the recess 121 formed inl the side of the hammer 10.4,and spring held inwardly by the spring held pin 122 arranged within the recess 123 extending laterally from 'the .recess 121.

124 is a projecting lug extending rearwardly froml the lock. 66 and arranged in alinement with the stop member 120 on the a hammer so that when the said lock is withdrawn from the breech bloc-k, the said lug 124 willv engage the front edge of the stop l member120 and prevent the hammer swing- 127 is a spring catch iixedly secured to the rear side of the magazine and having a notched portion adapted to engage the cross *bar andr hold said magazine securely in place.;

128is yay follower of the magazine adapted to support the cartridges,.said follower being in turn'supported` by themultiple leaf spring 129 arranged betweeny the follower 128 and the removable bottom 120. The

spring I129 holds the cartridges upwardly against the underside of the breech'block and on the withdrawal of the breech block the upper cartridge'is moved in front of the said block and on the return movement of the said breech block the said cartridge is carried forward to the firing chamber.

}g ,ullingvy of the trigger is obl 118is thrown intothe position shown in Fig. s 3,y drawlng the pin 115 downwardly so that f 'top of` said pin on the pulling of said trig-V iger. The handgrip is then pushed for- ;ward with a quick movement to compress the' spring 23 and is then released. "lhel v, In the operation of this device, if it is 'i desired to fire single shots, the cam lever g. the shoulder 119 formed-by the cross notchj 94 1n the trigger member 93 will pass the agi -' spring 23 returns the'gri-p toits original oi sition and drives the rod 25 backwardv On the return movement o'f the rod 25 the l beveled under edge of the portion 28 of the rod engages the sloping forwardbside of the dog and throws the lock 66 'downwardly freeing the breech block. The rearmo'st endv of the member 28 engages the pawlv77 secured to the breech block 39just before'y the lowermost portion of said member passes over the top end of the dog 75, thus drawing the bolt backwardly before the lock vis `re, leased, consequently when the lock springs upwardly after the said member 28 "has against' the underside of the said breech` block. The rod 25 moves rearwardly carry- `ing with it the breech block and -saidblock engaging the hammer 104 swings it upon its'- pivot until the sear 108 engages the bent in' the hammer to hold it in the cocked position. The rod 25 continues its rearward f movement, carrying the breech block with. it, until the rigid block 30 extending in? wardly from the side of the'receiver 2 engages the beveled end of .the pawl 77. The impact of the pawl againstthe block 30l forces the said pawl upwardly releasing the hook portion thereof fromV the member 28 thus releasing the breech block which is returned to its normal position by the spring 57. As the breech block moves backwardly it slips over the upper cartridge in the magazine and immediately the forward end .of said breech block `clears the said cartridge. The magazine spring forces it upwardly in front of the breech block and against the fiat leaf spring 64. The breech block in itsv return pushes the cartridges into the firing chamber, the spring (i4-guiding the point into the said chamber, and the spring dog 8O engages thev fiange ofthe cartridge.'` The lock 66 springs upwardly into place locking the breech block securely the instant the said breech block comes to rest. y

The above operations load and cock the passed the locking portion merely v'springsarm and it is ready to be fired. To fire the arm, the trigger is pulled, causing the the spur 112 on the sear 108, thereby tilting the said sear and releasing the hammer.

The hammer swings forwardly on its pivot and strikes the firing pm, dlscharging the cartridge. Immediately after the bullet passes the orifice 4 leading from the barrely to the cylinder 3 a portion of the gases of the explosion enters the cylinder 3 through the said orifice and forces the piston 16 f orwardl said piston compressing the spring 23.l he piston moves forward untll 1ts rear end passes the orifices 5 at the forward end of the cylinder 3 when a portion of the gases escapes from the said cylinder, thus relieving the pressure on the piston so that it,will not be driven sharply to a sudden stop and jar the arm before the escape of the bullet from the barrel. As the bullet leaves the barrel the gases escape and release the spring 23 and said spring operates the rod 25 and coacting parts in the same manner as previously described. rllhe breech block moving rearwardly withdraws the discharged shell from the ring chamber and said shell is ejected through the side opening 84 by the operation of the ejector pin as previously described. Immediately following the' ejection of the empty shell the next succeeding cartridge within the magazine is forced upwardly by the magazine spring and is placed in the firing chamber in the same manner as previously described and the breech block locked securely. The reloading of the arm is automatically repeated in the manner above described after each shot. It will, therefore, be understood that very rapid ring may be accomplished if desired, that is to say, it is merely necessary to pull the trigger for each shot.

If it is desired to discharge the cartridges in rapid automatic succession it is merely necessary to throw the cam lever 118 downwardly allowing the spring 117 to lift the pin 115 into the notch 94 in the trigger eX- tension 93. The movement of the trigger is thus limitedby the shoulder 119 engaging the pin 115 and the latch-100 only moves sufficiently farto lift the sear clear of the hammer and does not pass under the spur 112. The sear is thus held in its tilted position clear of the hammer so long as the trigger is held. Following the discharge of the first cartridge the breech block moves back- Wardly discharging the empty shell and immediately reloads. The hammer is forced back by the receding bolt and follows the said bolt on its forward movement until the stop member 120 engages the lug 124 on the lock 66. The forward movement of the hammer is thuis arrested until the breech block reaches the limit of its closing movement and the hammer is released by the npward movement of the lock 66, the lug 124 moving clear of the stop member 120 and allowing the hammer to strike the firing pin. It will be understood from this description that the hammer follows the breech block verytclosely and discharges the cartridges immediately following the locking of the breech block the ejection of the empty shell and the reloading occurring in auto- Athe bent in the hammer on the latch -100 Y magazine Vfull4 of cartridges may matic successionwhile the trigger is held. The firing will, "however, immediately cease on the release of the trigger as the sear will immediately swing upwardly and engagey moving out of engagement with the spur 112.

All the parts to this device are very simple and very positive in their operation and through the arrangement of the various parts perfect safety of operation-is insured. The cartridges cannot possibly be discharged until the breech block 1s locked and `further position, throwing the latch 100 out of operating contact with the sear. All of the partaV are very simple to construct and there 'are no delicate parts ,likely to get out of order. j

An arm such as described will lbe very suc-j cessful for many purposes and not only renders the very rapidring possible,-buten` ables the person shooting at a moving object to maintain hissight fora second shot very much better than if he Ihas to operate vthe' reloading by Aany movements of his own hands and cases of' emergency the'whole be vdischarged in automatic' succession.

All of the parts of the operating mecha- Ejsm of this device, 1 are veryfeasily` accessimay be instantly removed. from the receiver ing the bifurcated .portion 86 and the stock and trigger frame may be withdrawn. The

The trigger and hammer mechanism breech block may be'removed by pressing in- Y wardly on the spring pin 53 and sliding the cover 61 rearwardly and on its removal the spring pin y53 may be depressed and the rod 49 withdrawn and on the withdrawal of said rod and its spring, the breech block may be moved' to the rear end of said receiver and lifted out, the breech block mayV then be slipped outfof its retaining grooves. The hand grip 13 vis held to the piston rod by the nut 20 and the said piston rod may be adjusted so as to adjust the rod 25 properly to bring the pawl "77 into proper engagement with the block 30, thatis to say, the point of the cam member 28 may be adjusted to and from the block 30 by turning ton rod. In order to remove the piston from its cylinder and'consequently to remove the rod 25 the spring pin 34 may be pressed inwardly to free the slide 32, said slide may then be drawn `forwardly out of its retaining groove, the nut 20 is then removed from the end of the piston rod and the grip 1.3 slipped off the end thereof. Following this, the bushing 11 may be removed from its notch and the spring and piston rod withdrawn. It will thus be seen that all the parts maybe easlly cleaned and replaced and also that the the nut 20 upon the threaded end of thepisv pression spring holding said "hammer and trigger 'mechanism -is 'very-easily and-quickly detached 'fromfrthe barrel' and receiver for the purpose of in'its closed position, a' cylinder having 'a port leadingl to its rear end from sald barrel,

a piston operating in saidcylinder, a comiston to its rearward posltion, a rod rigid y connected to said .piston and adapted to unlock said locking means and to engage said pawl to retract said breech block, a stationary member within said receiver adapted to disengage said pawl from said rod, means for returning said breech block to its closed position,'a hammer pivotally supported in saidf receiver and operated by said breech bloc-ln;

and means for controlling the movement of tical grooves formed in. the inner walls of' the receiver and spring held upwardly andsaid hammer.

2. In an automatic're arm, the combination with the barrel and receiver, of a breech block slidably supported in said receiver, a: pawl pivotally secured to said breech block, vl' means for locking said breech block in its closed position,l a cylinder having a portv leading to its rear end from said barrel, a piston operating in said, cylinder, a cornpression springholding sald piston to its rearward position, a rod rigidly connected to said piston and having a cam shaped end 'extending into said receiver, said cam shaped end being adapted to unlock said locking means and to engage the pawl of said breech blocky to retract said breech block, means within said receiver for releasing said pawl from engagement with Vthe cam shaped end of` said rod, means for returning said breech block to its closed position, va hammer pivotallysuppo-rted in said receiver and operated by said breech block, and meansfor controlling the movement of said hammer. v

3.y In an automatic tire arm, the combinai tion lwith the barrel and receiver, of a breech block slidably supported in said receiver, a pawl -pivotally secured in a recess formed in theside of said breech block, means for'lockingsaid .breech bloclr to its closed/position, a cylinder ia-vinga port leading toits"rear end from said barrel, a piston operating in said cylinder, a compression spring holding said piston toits rearward position, a rod `rlgldly connectedv to saidA pistonv and eX-v tendlng lnto said recelver and having a cam'v shaped end, said4 cam" shaped end being formed with a downwardly and forwardly sloping under edge and an outwardly beveled front edge, the upper corner of said cam being adapted to engagel the hooked end lof the said pawl, means .for releasing said paWl packing the :returning said breech block to its forward closed position, a hammery ipivotalty :sup-L ported 1n said receiver andoperated by sa1d breech block, and means for controllingthe Y movement of said hammer. f'

el.y I-n an automatic lfirearm, the combinaf tion with the barrel and receiver, of a breech 'block slida'bly supported in said receiver, ia

yvertically operating spring held vbolt sliding in vertical grooves in 'the side walls Of-said receiver and engaging and holding said breech block in its closed position, `meansfor operating said locking bolt actuated by the gases of explosion, means for returning said breech block to its closed position, a hammer f i pivotally supported in said receiver and` operated by said breech block, and means for controlling the movement of said hammer.

5. In an automatic firearm, the combination with the barrel and receiver, of a breech block slidably supported in said receiver and having a vertical notch cut in one side thereof, a locking bolt slidablyy supported inverl having an upward extension adapted to engage the notch cut in the side of said breech block and a recess in the forward face thereof and a notch inthe edge opposite thelocking extension, a dog pivotally supported in,

the recessed portion of said locking bolt and j spring held toward the inner wall of the receiver, said dog having its front face beveled backwardly at the top, a cam member having a beveled front edge and apdowns,

wardly and forwardly beveled under edge,

said beveled front edge being adapted toswing said dog on its vpivot on the forward movement and said under edge beingV adapt-v ed to engage the beveled top of said dog and draw said locking block downwardly to free the breech block on the rearward movement of said cam member, said cam member be- Aingadapted to engage said breech block in its rearward movement, means operated bythe gases of explosion for moving said cam member forwardly, means for lreturning` sald cam member to lts rearmost -pos'it1on.

a hammer pivotally supported in said re.- ceiver and operated by said breech block, and means for Acontrolling said hammer.

` 6. In an automatic re arm, the combination with the barrel and receiver, of a `breech block slidably supported in said receiver,

4means for locking said breech block in its l closed position, means' for unlocking and.y retracting said breech block,'means actuated bythe gases of 'explosion for actuating said unlocking and retracting means, means forl releasing said breech block from said retracting means, a spring compressed by said retractingymeans and adaptedto return said breech block to its closed position following its release, a spring operated pivotal hamaso mer sup orted in said receiver and operated by said breech block, means carried by said locking means and said hammer for retarding the forward movement of said hammer until the breech block is locked, and means for controlling the movement of said hammer independent of the aforesaid means.

7. Inan automatic fire arm, the combination with the barrel and receiver, ofV abreech block slidably supported in said receiver, a firing pin extending through said breech block and secured therein, a vertically operated locking member for securing said breech block in its closed position, said locking member having a rearwardly projecting lug therefrom, means actuated by the gases of explosion for operating said breech block and locking member, a spring actuated hammer supported in said receiver and adapted to strike said tiring pin and having a forwardly projecting member adapted to engage the lug on said locking member when said locking member is withdrawn from said breech block, said lug and proj ecting member from said hammer `being adapted to withhold said hammer from striking the firing pin until the breech block is securely locked, and independent means for controlling the movement of said hammer.

8. In an automatic fire arm, the combination with the barrel and receiver, of a breech block slidably supported in said receiver, a locking bolt adapted to lock said breech block in its closed position, said locking member having a rearwardly projecting lug therefrom, means for unlocking and retracting said breech block actuated by the gases of explosion, means for returning said breech block to its closed position, a spring actuated hammer pivotally supported in saidl receiver, an obstructing member supported in a recess formed in said hammer and extending forwardly therefrom in vertical alinement with the lug projection from said locking bolt, said obstructing member being spring held to its inward position and adapted to spring outwardly to allow the said lock to be withdrawn from the breech block and adapted to engage the rearward edge of the said lug to withhold said hammer from striking the firing pin until the block is raised to its uppermost position locking said breech block, and a trigger mechanism adapted to control the movement of said hammer.

9. In an automatic fire arm, the combinati-on with the barrel and receiver, of a breech block slidably supported in said receiver, means for locking said breech block in its closed position, means for unlocking and retracting said breech block actuated bythe gases of explosion, means for returning said breech block to its closed position, a hammer pivotally supported in said receiver and spring operated and having a bent formed in its lower end, a Sear pivotall supported on said receiver and spring hel in engagement with said hammer, said sear having a. spur member extending downwardly from its under side, and a trigger having a rigid extension slidably supported in said receiver, and a projectin member adapted tov engage the spur of sai sear to tilt said sear and swing it clear of said hammer.

10. In an automatic tire arm, the combination with the barrel and receiver, .of a. breech block slidably supported in said receiver, means for locking said breech block in its closed position, means for unlocking and retracting said breech block actuated by the gases of explosion, means for returning said breech block to its closed position, a hammer pivotally supported in said receiver and spring operated and having a bent formed in its lower end, a sear pivotally supported from said receiver and spring held in engagement with said hammer, said sear having a downwardly projecting spur member formed with a downwardly and rearwardl inclined forward edge, a trigger member slid5I ably supported within said receiver, and a spring held latch member pivotally secured to the upperside of said trigger member and having a hook shaped forward end adapted on the rearward movement of the trigger member to engage the'sloping forward edge of the downwardly projecting spur from said Sear to tilt said sear on its pivot and release said hammer and adapted on the forward movement of said trigger member to swing laterally on its pivot and pass said spur.

11. In an automatic fire arm, the combination with the barrel and receiver, of a breech block slidably supported in said receiver, means for locking said breech block in its closed position, means for unlocking and retracting said breech block actuated by the gases of explosion, means for returning said breech, block to its closed position, a hammer pivotally supported in said receiver and spring operated and 'having a bent formed in its lowerl end, a Sear pivotally supported from said receiver, and spring held to engage the bent in said hammer, a. trigger mechanism adapted to engage the downward projection from said sear to tiltsaid sear to free said hammer, and means for limiting the movement of` said trigger mechanism to hold said Sear in its dlsengaged position clear of said hammer.

12. In an automatic fire arm, the combination with the barrel and receiver, :of a breech block slidably supported in said receiver, means for locking said breech block in its closed position, means for unlocking and retracting said breech block actuated by the gases of`explosion, means for returning said breech block to its closed position,'a

necesa-1 hammer pivotally supported in said receiver and spring operated vand having a bent formedyin its lower end, a sear -pivotally lsupportedl from said receiver and sprin' 'l ,held to engage thebent in said hammer an having a downwardly projecting spur'therefrom, a trigger mechanism `adapted to -eny gage the downwardly extending spur from the movement vthereo said searto tilt said sear.l to free vsaid hammer, a pin spring held upwardly and adaptl giger mechanism to limit to hold said sear in a. disengaged ,position from said hammer, and ymeans for operating said pin.l

13. In van automatic ire arm, the combi- ,nation with the barrel and receiver, of .a

ed to engage said tri breech-block slidably supported in said ,re-

' A said breech block to its closed .ceiver, means for locking'said breech block .in its closed position, means for unlocking and retracting said breechv block actua-ted by the gases of explosion, means for'returning osition, a

I hammer pivotally supportedv in said receiver" and spring operated and having av bent formed in its lower end, a Sear pivotallyv supported in said receiver and sprmg heldV to engage the bent in said hammer, a trigger member slidably sup orted within said receiver andspring he d forwardly and having a cross notch in its under side adjacent to the forward end, means secured to said trigger member for tilting said Sear on its ceiver, a ro pivot, a pin extending through a vertically arranged slot in the bottom of the trigger frame and spring held upwardly and adapted to extend into the notch in the under side -of said trigger member, and a cam lever pivotally secured to the outer end of said pin and adapted to raise and'lower said pin within said receiver to control the move-r lment of said trigger.

14. In an automatic iire arm, the com- 'bili'ation with the barrel and receiver, of a breech'block slidably supported in said receiver, means for locking said breech block in its closed position, means for unlocking and retracting said breech .block actuated by the gases of explosion, means for returning said breech block to its closed positio'n, a hammer ivotally supported in said red) pivotally secured to said hamrmer and extending rearwardly therefrom, a.

lug extending inwardly from the'side wall of the receiver, a compression spring encircling said rod betweenthe hammer and said lug and exerting a forward pressure against said hammer, a. swinging flanged member pivotally supported from said lug vand havmg a hole therethrough through which said hammer rodextends,y a sear pivotally supported upon a suitable pin secured yin the side of the receiver, a trigger member slidably supported at its forward end on the cross bar extending across the receiver bottom and retained in place by the anged end ofthe swinging member securedto the lug from the said frame, means se-4 cured to said triggervmember adapted to tilt said sear onv its pivot, a fiati-leaf springsecured to said trigger'memberand engaging thehforward end of said Sear and hold- A1ng 1t to engagement With-said hammer, and means for throwing said trigger mechanism.

outfof .operating connection withsaid sear.

15.11'1 an automatic fire arm, the comb1nat1on with the barrel ,and receiver, of a ceiver, means for locking said breech-block 1n its lclosed position, .means for unlocking and retracting said breech block-actuated by the gases of explosion, meansfor returning4 said breech block to its closed position, .a spring actuated hammer pivotally supported within said receiver, a scar pivotally supported within said receiver, a trigger mem,- ber slidably supported in said receiver, a' spring held dog pivotally secured to said breech block slidably supported in said rei trigger member and adapted to tilt said of the opening in said receiver, Said side walls also having longitudinal slots` in the inner wall thereof above the aforesaid ledges open at `the rear ends and longitudinal grooves in the outer side toward the forward end, a, cover in the form of a flat plate hay in'g downwardly extending flanges'adapted rearwardly upward slots in said receiver wall and a hole in the rear end. thereof extending therefrom, a spring pin supported within a recess in the rear endof saidreceiver and extending upwardly through a hole in sai in lace closing in the top of said receiver,

a, at leaf sprmg secured to the underside cover and holding said cover to extend into the forward .notches and the of said cover and hfavingits forward edgev i extending downwardly adjacent to the entrance 'to the firing chamber in the barrel, a breech block having outwardly pro'ecting side flanges resting upon the ledges ormed in the side walls of sald receiver and sliding thereon, means actuated by the gases of ex lplosion for operating said breech block, a'V animer pivotallysupported' within saidre'- ceiver and operated by said breech block, and a trigger mechanism for controlling the movement of said hammer.

17. In an automatic fire arm, a barrel, a receiver, a breech mechanism operating'in yond the end of said c'ylin incosing said cylinder and piston rod and said grip having an spring held in position,

openin through the forward end thereof throng which the forward threaded end of said plston rod extends, a nut secured on thel threaded end of said ,piston rod, means for holding said nut from turning, and means for operating said breech mechanism rigidly connected to said piston. rod.

Signed at the town. of Mitchell, in the county of Perth and Province of Ontario, this 18th day of August, A. D. 1909.

DANIEL Gr. HENNICK.

Witnesses: l

F. A. CAMPBELL, T. H. THOMPSON.

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