US1410270A

US1410270A - Firearm

Info

Publication number: US1410270A
Authority: US
Publication date: 1922-03-21
Anticipated expiration: 1939-03-21

Description

UNITED STATES PATENT OFFICE.

FIREARM.

Specification of Letters Patent.

Patented Mar. 21, 1922.

Application filed December 13, 1919. Serial No. 344,678.

To all whom it nmy concern:

Be it known that 1. JOHN D. Pnnuusnn, a citizen of the United States, residin in Jackson, in the county of Lincoln and btate of lVyoming, have invented certain new and useful Improvements in Firearms, of which the following: is a specification.

This application, as regards some of the principal features thereof. is in the nature of an improvement in the breechblock mechanism which is set. forth in my Patent No. 1.348333, dated August 3, 1920, and granted on my copending (renewal) application Serial No. 311,689. filed July 17th, 1919, to which reference may be had.

One class of firearms to which my present improvements are applicable includes autoloading pistols.

An improved auto-loading pistol of this kind is described in my said patent. Therefore, for convenience of illustration, I have herein illustrated my present improvements as arranged and applied to the particular kind of autoloading pistol which is shown in the drawings of said patent, to which reference may be had.

One object of the present improvements is to furnish for use in firearms and especially for use in auto-loading pistols an improved slide-and-bloek mechanism in which the hreechblock transmits rearward move ment to the slide and is retarded relatively to the slide during an early part of the rearward stroke of the slide, and during the shell-extracting period, without requiring the breechhlock to have a compound movement relative to the slide. A further object is to provide an abutment member coactive with and as between the slide, breechblock and frame, and adapted and arranged for timing and controlling said breechblock movements. Other objects and advantages are indicated, or pointed out in the course of the following description.

An embodiment of my invention is illustrated in the accompanying drawings in Figure 1 is a side view, partly broken away to show the details, of a pistol provided with my slide-and-breechblock mechanism, the slide and breechblock being in forward or normal position. and the abutment member being in unlocking or downward position and in engagement with the abutment face of the frame of the pistol for retarding the breechblock in rearward action, the firing: member or hammer bemg in firing position, and the slide being locked in forward or normal position and against rearward movement by a slidablc member or controller, which also locks the scar member and firing member or hammer in firing position, the slidable member or controller being blocked in this locking or upward position by a grip-compressible or grip-operable member which is in normal position or position of safety.

Fig. 2 is adetail sectional view, on a larger scale than Fig. 1, on the line 2-2 of Fig. 1, of a pistol provided with my slideandbreech-block mechanism, looking in the direction of the arrow, the firing member or hammer being shown in full.

Fig. 3 is a fragmentary side view, on a larger scale than Fig. 1, showing the details of a pistol provided with my slide-and breech-block mechanism, the slide and breechblock being moved somewhat rearwardly, the abutment member having received the thrust or shock of the breechblock in its rearward movement but still being in unlocking or downward position and in an gagement with the abutment-face of the frame of the pistol, the firing member or hammer being moved somewhat from fired position to firing or cooked osition, the slidable member or controller ein in unlocking or downward position, and t e gripcompressible or gri -operable member, :1 though in course 0 movement to normal position or position of safety after gripcompression, does not yet block the slideble member or controller which is not yet moved to locking or upward position.

Fig. 4 is a detail sectional view of a pistol provided with my slideand-breech-block mechanism showing the slide moved somewhat more rearwardl and the firing memher or hammer move somewhat further towards firing or cooked position than in Fig. 3, the slidable member or controller being still in unlocking or downward position, the

abutment member being still in engagement with the said abutment face of the frame of the pistol, but just prior to disengagement therefrom and moved to locking or upward position, and the grip-compressible or gripoperable member, a though in course of movement to normal position or position of safety after (grip-compression, does not yet block the sli ab e member or controller, which is not yet moved to looking or upward position.

Fig. 5 is a fragmentar sectlonal detail side View of a pistol provi ed with my slideand-breechblock mechanism, showing the firing member or hammer moved to firing.

or cocked osition b rearward movement of the slide, and 1e abutment member disengaged from the said abutment-face of the frame of the istol and in upward position, or position or locking the breechbloclr to the slide.

Fig. 6 is a fragmentary detail plan view of a pistol provided with my slide-andbreechblock mechanism showing the slide, the breechblock, the firing-pin offset in the breechblock, the abutment member and the firing member or hammer.

Similar reference characters or numerals refer to similar parts throughout the several views.

The pistol in the present embodiment of my invention is provided with the slide C, and with the breechblock E carrying the firing-pin P. The force of the powder ases is first exerted upon the breechblock T) to move it rearwardly, and is transmitted by the breechbloclc E to the slide C to move the slide rearwardly. The breechblock E is retarded in its rearward movement by engagement of the abutment member 10 with the abutment-face 2 of the frame of the pistol and rearward movement of the breech ilock is transmitted to the slide, and during said transmission the brcechblock is retarded relative to the slide and locked to the slide (J and continues to move rcarwardly with the slide (3 until the slide has reached its most rearward or retracted position.

The abutment member 10, as shown in the drawings comprises a body portion 11 and a wing portion 12, the body portion 11 being pivotally arranged at its upper end in the slide C. which is recessed. as at 13, or otherwise suitably arranged to allow 4 pivotal movement of the abutment member. The wing portion 12 is provided with a cam face 14 which engages a co-acting cam-face 15 on the breechblock E, and is provided with a straight face 16 which engages the abutment-face 2 of the frame of the pistol. The body portion 11 is provided with a face 17 which engages the roller 3 carried-by the slide for retaining the abutment member H). in the recess 13, but the body portion 11 may be pivolnlly attached at its upper end to the slide C. The wing portion 12 is provided with a pin 18 which works or travels in a slot 19 formed in the breechblock E.

The firing member or hammer H is pivotally supported on the grip-stock of the pistol and is movable to firing position and to fired position. The firing member or hammer H is moved from fired position to firing position or cooked position by en gagement or contact of the roller 3" of the slide with the forward face of the firing member or hammer as the slide is moved rearwardly to its most rearward position; or the firing member or hammer may be moved to firing position or cooked by a suitable face on the slide which engages or contacts with the firing member or hammer when the slide is moved to rearward osition.

The firing member or hammer is provided with a. firing notch or cock-notch 8, and with an eccentric cam face 8", the gripstock of the pistol being bored out or otherwise suitably cut away, as at 2* to receive the firing member or hammer.

The slidable member or controller N is received in a suitable opening 20 in the frame of the pistol, and is movable upwardly and downwardly between suitable guidefaces 6 and 7) formed on the frame of the pistol. The slidable ni'ember or controller is provided with an upper end or point 14- which is engageable with the face 33 on the breech block. The slidable member or controller N is provided with a shoulder 14 having upper engagin surfaces 14, and having bottom-sides or ottom-faces 14. An actuator 14" is provided to move the slidable member or controller upwardly.

The lever member a is pivotally attached to the hammer H and is provided with a face which engages the actuator 14", and is provided with a point which engages the sear member S.

The scar member-S is pivotally supported on the grip-stock of the pistol and, is provided with an arm 5* which is eugageable with the upper surfaces 14 of the shoulder .11" ot' the slidable member or controller N.

and provided with a locking-shoulder 17.

which is engageable with the firing-notch or cock-notch 8 of the firing member or hammer H, and provided with a face 17 which is engageable with the eccentric cam face 8 of the firing member or hammer. A lever arm 17 is provided on the sear member S which engages the point of the lever men'iber w. and the sear member is provided with an end-face 17.

The trigger member F is movable forwardly by means not shown, and bv pull thereon is movable rearwardly for engagementwith the sear member Si The grip-operable member (i is 'iivotally connected at its lower end to the grip-stock of the pistol. prelerably in the manner described and shown in my co-pending application Serial No. 311,689, filed July 17th, 1919, and is engageable at its upper end with the frame of the pistol when in normal position or position of safety. The grip-operable or grip safety member G is yieldable or hand-compressible and closes the space 2 in the grip-stock, and is releasable from engagement with the frame of the pistol by grip-compression. The gri -operable or grip-safety member F is provided with lockjug-prongs 7' which are engageable with the bottom-sides or bottom-faces 14 of the slidable member or controller N, when the gripoperable or grip-safety member G is in normal position or position of safety, to block the slidable member or controller in locking or upward position the grip-operable or rip-safety member being releasable from t is engagement by gri -compression.

The spring 8 is seata ly connected to the grip-operable or grip-safety member G preferably in the manner described and shown in my said patent. The spring 8* abuts a plunger 8 slidably carried by the gripoperable 0r rip-safety member G. A rod 8 is pivotafiy attached at its upper end to the firing member or hammer and is seated at its lower end in the plun er 8. The spring 8* moves the firing mem er or hammer H to fired position, and afiords gripcompression of the grip-operable or gripsafety member G, and returns the gripoperable or rip-safety member to engagement ,with t e frame of the pistol, or to normal or position of safety, after gripcompression.

In 0 eration, the firing member or hammer being in firing position, and the slidable member or controller N being in looking or upward position for preventing rearward movement of the slide 0, (Fig. '1) uftergrip-compression of the grip-operable or grip-safety member G releases the locking-prongs 7 thereof from engagement with the bottom sides or bottom-faces 14 of the slidable member or controller TN and permits movement of the slidable member or controller to unlocking or downward position, pull upon the trigger member F, while the grip-operable or grip-safety member is qgrip-compressed, moves the sear member L to release the firing member or hammer H for movement to fired position. As the sear member S is moved to release the firing member or hammer H. the arm 3 of the sear member engages or bears down upon the upper surfaces 14* of the shoulder of the slidable member or controller N, and thereby moves the slidable member or controller to unlocking or downward position, Fig. 3. The firing member or lmmmcractuated by the spring 8" engages or comes into contact with the tiring-pin l and the pistol is discharged.

with the abutment-face 2 of the frame of 'the pistol, transmits rearward movement to the slide. The abutment member 10 oscillates or is raised as shown in Fig: 4, and the cam face 14 of the abutment member engaging the co-aeting face 15 of the breechblock thevabutment member is moved until the face 16 thereof clears the abutment face 2' of the frame and is freed from engages ment therewith, and during this movement of the abutment member, and during transmission of rearward movement of thebreech-block to the slide, the breechblock is retarded relative to the slide. The pin 18 having moved or travelled upwardly 1n the slot 19, through the eo-action, of the pin 18, the cam face 14, the co-acting cam face 15, and the face 17 which engages or rides on the roller 3", the breechblock E is locked in the slide 0, and is carried rearwardly with the slide C until the slide reaches its most rearward or retracted position, Fig. 5. As the roller 3 travels rearwardly with the slide 0 it engages or comes into contact with the front-face of the firing member or hammer H, and riding over the firing member or hammer moves or forces it rearwardly and downwardly against the compression of the spring 8 until the firing member or hammer is locked in firing or cocked position by the sear member S. In movement to firing or cooked position the firing member or hammer H by engage ment of the eccentric cam face 8 thereof with the face 17" of the sear member S moves the sear member downwardly or in direction to disengage or move upwardly the arm S thereof from the upper surfaces 14 of the shoulder 14' of the slidable member or controller N and permits movement of the slidable member or controller to lock- For engaging the'slide C to lock the same against rearward movement, and to look as well the sear member S and the firing memher or hammer H in firing position. Gripcompression of the grip-operable or gripsa-tety member (i being released, the gripoperable or grip-safety member is returned to engagement with the frame of the pistol onto-normal position or position of safety, by the spring 8, while the locking-prongs T" move'into engagement with the bottomsides or bottom-faces 14 of the slidable member or controller N and block the slidable member or controller in locking or upward position. The breechblock E still being locked to the slide 0 is moved forwardly with the slide by spring means of the slide which are not shown, until the breechblock and slide are in their forward or normal position.

Having thus described my invention, I claim,

1. In a firearm. in combination. a frame of said firearm, a slide movable rearwardly and forwardly on said frame, a breechblock movable rearwardly and comprising a firingpin, retarding means on said frame, means on said slide engaging said breechblock and engaging said retarding means for retarding rearward movement of said breechblock and for transmitting rearward movement from said breechblock to said slide, and for, providing retardation of said breechblock relative to said slide during transmission of rearward movement of said breechblock to said slide, and for providing subsequent concurrent movement of said breechblock and said slide, a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing-pin, slidablc means engageable with said slide. sear means engageable with said firing member, means for moving said slidable means in direction for engaging said slide to lock said slide against rearward movement. and lock said sear means and firing member in firing position, means for moving said slidable means in direction reverse to the first mentioned direction when mid firing member is moved to fired position, spring means for moving said .firing member to fired position, a grip-compressible member engageable with said frame and engageable with said slidable means when in position of safety, to block said slidable means in said locking position, and releasable from both said engagements by grip-compression, and trigger means engageable, when said grip-compressible member is grip-tomprcssed, with said sear means for moving the sear means to release said firing member for movement to fired position.

2. In a firearm. in combination, a frame of said firearm. a slide movable rearwardly and forwardly on said frame. retarding means on said frame, a breechblock initially movable rearwardly relative to rearward movement of said slide, means on said slide and engaging said breechblock and engaging said retarding means for retarding initial rearward movement of said breechblock, and for transmittin rearward movement from said breech look to said slide, and for providing retardation of said brecchblock relative to said slide durin transmission of rearward movement of said breechblock to said slide, and for providing subsequent concurrent movement of said breechblock and said slide, a firing member movable to firin position by rearward movement of said sli e and movable to fired position and engageable with said firing-pin, slidable means engageable with said slide, sear means engageable with said firing member, means for moving said slidable means in direction for engaging said slide to lock said slide against rearward movement, and lock said sear means and firing member in firing position, means for moving said slidable means in direction reverse to the first mentioned direction when said firing member is moved to fired position, spring means for moving said firing member to fired )osit-ion, a gripcompressible member engagea le with said frame and engageablc with said slidable means when in position of safety, to block said slid-able means in said locking position, and releasable from both said engagements by gripeompression, and trigger means cngageable, when said grip-compressible member is griprompressed. with said sear means. for moving the sear means to release said firing member for movement to fired position.

3. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly and forwardly on said frame, a breechblock movable rearwardly by powder gases prior to rearward movement of said slide and compiising a firing-pin, retarding means on said frame, means on said slide en ging said breechblock and engaging sair retarding means, for retarding rearward movement of said brcechbloelc when so moved by powder gases. and for transmittin rearward movement from said breechbloe r to said slide, and for providing retardation of said breechbloek relative to said slide during transmission of rearward movement of said breechblock to said slide, and for providing subsequent concurrent movement of said breechblock and slide, a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing-pin, slidable means engageable with said slide. sear means engageable with said firing member and engageable with said slidable means, means for moving said slidable means in direction for engaging said slide to lock said slide against rearward movement, and lock said sear means and firing member in firing position, means for moving said slidable means in direction reverse to the first mentioned direction when said firing member is moved to fired position, a ip-operable member engageable with sai frame and engageable with said slidable ,means when in position of safety, to block isaid slidable means in said locking position,

and releasable from both said engagements by grip-compression, spring means for moviriiig said firing member to fired position, and a ording grip-compression of the grip-operable member, and for returning the gripoperable member to position of safety after grip-compression, and trigger means engageable, when said grip-operable member is grip-compressed, with said sear means, for moving the sear means to release said firing member for movement to fired position.

4. In a firearm, a slide movable rearwardly and forwardly on said frame, a 'breechblock movable rearwardly by powder gases prior to rearward movement of said slide and comprising a firing-pin, retarding means on said frame, pivotal means on said slide engaging said breechblock and engaging said retarding means, for retarding rearward movement of said breechblock when so moved by powder gases, and for transmitting rearward movement from said breeehblock to said slide, and for providing retardation of said breechblock relative to said slide during transmission of rearward movement of said breechblock to said slide, and for providing subsequent concurrent movement of said breechblock and slide, a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing-pin, slidable means engageable with said slide, sear means engageable with said firing-member, means for moving said slidable means in direction for engaging said slide to lock said slide against rearward movement, and lock said sear means and firing member in firing position, means for moving said slidable means in direction re verse to the first mentioned direction when said firing member is moved to fired position, a grip-operable member engaseable with said frame and engageable with said slidable means when in position of safety, to block said slidable means in said locking position, and releasable from both said engagements by grip-compression, means for moving said firing member to fired position, and affording grip-compression of the grip-operable member, and for returning the grip-operable member to position of safety after grip-compression, and trigger means engageable, when said gripoperable member is grip-compressed, with said sear means for moving the sear means to release said firing member for movement to fired position;

spring 5. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly and forwardly on said frame, an abutment on said frame, a breechblock movable rearwardly by powder gases prior to rearward movement of said slide, an abutment memher on said slide provided with faces engaging said breechbloek and enga ing said abutment on said frame, for retanfing rearward movement of said breechblock, when so moved by powder gases, and for transmitting rearward movement from said breechbloek to said slide, and for providing retardation of said breechblock relative to said slide transmission of rearward movement of said breechblock to said slide, and for pro viding subsequent concurrent movement of said breeehblock and slide, a firing member movable to firin position by rearward movement of said sli e and movable to fired position and engageable with said firing pin, slidable means engageable with said slide, sear means engageable with said firinganembr, means for moving said slidable means in direction for engaging said slide to lock said slide against rearward movement, and lock said sear means and firing member in firing position, means for moving said slidable means in direction reverse to the first mentioned direction when said firing member is moved to fired position, a grip-operable member enga able with said frame and engageable wit said slidable means when in position of safety, to block said slidable means in said locking position and releasable from both said engagements 4 by grip-compression, spring means for movin; said firing member to fired position, and affording grip-compression of the grip-operable member and for returning the gripoperable member to position of safety after grip-compression, and trigger means ongagcable, when said grip-o erable member is grip-compressed, with sai sear means for moving the sear means to release said firing member for movement to fired position.

6. In a firearm, in combination, a frame of said firearm, an abutment face on said frame, a slide movable rearwardlv and for wardly on said frame and provi ed with a slot and with a roller member, a breechblock movable rearwardly by iowder gases prior to rearward movement 0 said slide and provided with a co-acting cam face, and provided with a face for enga ing said abutment face of the frame, an comprising a firing pin, an abutment member in said slide provided with a cam face engaging said coacting cam face of the breechblock, and provided with a face engagi said abutment face of the frame, and provided with a face engaging: said roller member and a pin engaging said slot for the slide, a. firing member movable to firing position by engage= ment with said roller member of the sllde when the sllde is moved rearwardly, and movable to fired position, and engageable with said firing-pin. a slidable controller movable upwardly and downwardly and provided with an end for engaging said slide, a sear member engageable with said firin member and 'engageable with said slide 1e controller, means for moving said slidable controller 11 wardly to engage said movement, and look said sear member and slide to look the side against rearward sion of the grip-safety mem er, and for returning the grip-safety member to osition of safety after grip-compression, an a trigger member engageable, when said gripsafety member is grip-compressed, with said sear member for movin the sear member to releasesaid firing mom or for movement to fired osition.

7. n a firearm, in combination, a frame of said firearm, a slide movable rearwardly said frame, .a breechblock movable rearwardly and comprising a firing-pin, means for retarding rearward movement of said breechblock, and for transmitting. rearward .movement from said breechblock to said slide, and for providing retardation of said breechblock relative to said slide during transmission of rearward movement of said breechblock to said slide, and a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing-pin.

8. In a firearm, in combination, a frame of said firearm, a slide movable roarwardl and forwardly on said frame, a breechbloc movable rearwardly and comprising a firing pin, means for retarding rearward movement of said breeehblock, and for transmitting rearward movement from said breechbl-pck to said slide, and for providing re-' tardation of said breechblock relative to said slide during transmission of rearward movement of said breeehblook to said slide. and

for providing subsequent eonrnrre-nt movement of said breeebblock and said slide, and a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageablewith said firing-pin.

F). In a firearm. in combination, a frame of said firearm, a slide movable rearwardly mitting on said frame, a .breechblock initially movable rearwardly relative to rearward movement of said slide and comprising a firingpin, means for retarding initial rearward movement of said breechblock, and for transmitting rearward movement from said breecbblock to said slide, and for providing retardation of said breechbloek relative to said slide during transmission of rearward movement of said breechblock to said slide, and a firing member movable to firing position by rearward movement of said slide and movable to fired .position and engageable with said firing-pin.

10. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly and forwardly on said frame, a breechblock initially movable rearwardly relative to rearward movement of said slide and comprising a firing-pin, means for retarding initial rear- Ward movement of said breeehblock, and for transmitting rearward movement from said breeehblock to said slide, and for providing retardation of said breeebblock relative to said slide during transmission of rearward movement of said breechblock to said slide, and for providing subsequent concurrent movement of said breechblock and said slide, and a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing-pin. 4

11. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly on said frame, retarding means on said frame, a breeehblock movable rearwardlv and comprising a firing-pin, means on said slide engaging said breeehblock and engaging said retarding means on said frame. for retarding ,rearward movement of said breechblock, and for transmitting rearward movement from said breechblook to said slide. and for providing retardation of said breechblock relative to said slide after retardation of rearward movement of said breeehbloek to said slide, and a firing memher movable to firinv position by rearward movement of said sli e and movable to fired position and engageable with said firingpin. 7

12. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly and forwardly on said frame, retarding; means on said frame. a breeehbloek movable rearwardly and comprising a firing-pin, means on said slide engaging said breechblock and engaging said retarding means on said. frame. for retarding rearward movement of said breechblock, and for transrearward movement from said breerbblork to said slide. and for providing retardation of said breeohblook relative to said frame after retardation of rearward movement of said ln'eeelibloolrto said slide. and ior providing subsequent concurrent movement of said breechblock and said slide, and a firing member movable to firing posi; tion by rearward movement of said slide. and movable to fired position and engage able with said firing-pin.

13. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly on said frame, retarding means on said frame, a breechblock initially movable rearwardly relative to rearward movement of said slide and comprising a firing pin, means on said slide engaging said breechblock and engaging said retarding means, for retardin initial rearward movement of said breechblock, and for transmitting rearward movement from said breechblook to said slide, and for providing retardation of said hreechblock relative to said slide during transmission of rearward movement of said breechblork to said slide, and a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing- 14. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly and forwardly on said frame, retarding means on said frame, a breechblock initially movable rearwardly relative to rearward movement of said slide and comprising a firing-pin, means on said slide engaging 'said breechblock and engaging said retarding means, for retarding initial rearward movement of said breeohbloclr, and for transmitting rearward movement from said breechhlock to said slide, and for providing retardation of said breechblock relative to said slide during transmission of rearward movement of said breech block to said slide, and for providing subsequent conourrent' movement of said breechblock and said slide, and a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing-pin.

15. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly on said frame, retarding means on said frame. a breechblock movable rearwardly by powder gases prior to rearward movement of said slide and comprising a firing-pin, means on said slide engaging said breechbloek and engaging said retarding means, for retarding rearward movement of said hreechblock when so moved by powder gases, and for transmitting rearward movement from said breecbblock to said slide, and for providing retardation of said breechblock relative to said slide during transmission of rearward movement of said breechblock to said slide. and a firing member movable to firing position by rearward movement of said slide and movable to fired position and engageable with said firing-pin.

16. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly and forwardly on said frame, retarding means on saidframe, a breechblock movable J'earwardly by powder gases prior to rearward movement of said slide, means on said slide engaging said breechbldclr and en aging said retarding means, for retar ing rearward movement of said breechblock when so moved by powder gases, and for transmitting rearward movement from said breechblock to said slide, and for providing retardation of said breechblock relative to said slide during transmission of rearward movement of said breechblock to said slide, and for providing subsequent concurrent movement of said breechbloclr and said slide, and a firing member movable to firing position by .rearward movement of said slide and movable to fired position and engageable with said firing-pin.

17. In a firearm, in combination, a frame of said firearm, a slide movable rearwardly on said frame, an abutment face on said frame, a breechblock movable rearwardly by powder gases prior to rearward movement of said slide and provided with a coacting cam-face and provided with a slot, an abutment member operatively arranged in said slide and provided with a cam face engaging said co-actin cam-face of the breechblock, and provi ed with a face engagin said abutment face of the frame, and provi ed with a pin engaging said slot of the breechblock.

,.18. In a firearm,- in combination, a frame of said firearm, a slide movable rearwardly on said frame and provided with a roller member, an abutment face on said frame a hreeehblock movable reaf'wardly by pow er gases prior to rearward movement of said slide and provided with a co-acting camfaee andprovided with a slot, and comprising a firing-pin, an abutment member operatively arranged in said slide and provided with a cam-face engaging said co-acting cam-face of the breechblock, and provided with a fare engaging said abutment face of the frame, and provided with a face engaging said roller member of the slide, and provided with a pin engaging said slot of the hreechbloclc, and a firing member enga e- :ible with said roller member of the slide for rearward movement thereby to firing position, and movable to fired position and engagcable with said firing-pin.

19. In a firearm, in combination, a. frame of said firearm, a slide movable rearwardly and forwardly on said frame and provided with a roller member, an abutment face on said frame, a breechblock movable rearwardly by powder gases prior to rearward movement of said slide and provided with a coacting cam-face and provided with a slot, and comprising a firingpin. an abutment member operatively arranged in said slide 7 slot of the breechblock, an engageable with said roller member of the and provided with a cam-face engaFing said co-acting cam-face of the breechb 00k, and provided with a face engaging said abutment face of the frame, and provided with a face engagin said roller member of the slide, and provi ed with a )in engaging said (i a firing member slide for rearward movement thereby to firlng position, and movable to fired position 10 and engageable with said firing pin.

JOHN D. PEDERSEN.

Witnesses FRANCIS H. RwHARns, GEORGE J. BARTELS.