US2259397A - Firing-pin selector device for firearms - Google Patents

Description

I 0a. w. I. SMITH 2,259,397

FIRING-PIN SELECTOR DEVICE FOR FIREARMS Filed April 11, 1940 2 Sheets-Sheet 1 WIL FRED I. SMITH W. I. SMITH Oct. 14; 1941.

I FIRING-PIN SELECTOR DEVICE FOR FIREARMS 2 Sheets-Sheet 2 Filed April 11, 1940 I INVENTOR VILFRED 1. SMITH & W

ATTORNEY.

Patented Oct. 14, 1941 UNITED STATES PATENT omce FIRING-PIN SELECTOR DEVICE FOR FIREARMS "wan-ed I. Smith, shap s-mama, assignor jt'o Savage Arms'Corporatlon, New York, N. Y., a corporation of Delaware Application April 11, 1940, Serial Nana-027 Claims. (0114-2-42) This invention relates to'a flring'pin selector device or as more fully stated a device for selecting one of two or more separate firing pins to'be operated by the "Single hammer released by the single trigger in a gun having two or more barrels.

The purpose of my present invention is "to provide a firing pin selector device of the type mentioned which is of new and improved construction, economical to make and assemble, safe and 'efiective in use and not liable to get out of order.

Further purposes of the invention are to'provide a device of the character described where a movable, preferably sliding selector or selector plate is interposed between the re'arwardly placed movable'or swinging hammerand the series of firing pins operatively separately connected to the several barrels of the gun and with said selector plate having associated therewith a forwardly and rearwardly projecting extension, which extension on movement of the said select'or rod can be brought immedi'a't'ely'to the rear of any one of the firing'pins so that upon the driving forward of the hammer'th'at firing pin will be actuated without disturbing or operating any of the other firing-pins. 1

A further'purpose is to provide a construction of the type indicated where the selector device can be moved to make its selection at any stage or position of the parts ofthe gun and without interfering with the firing mechanism of the gun or rendering the 'gun'le'ss safe.

A still further advantage and purpose of the invention is to provide in connection with such a selector device meansextending from the interior portion of the'device, that is the selector plate per se, outwardlyof the gun frame for manuallyoperating'the selector, an outward portion of said operating means also serving'as an indicator visible to the eye or indicating "by its position to the hand or fingers of thes'hooter which position the selector device is at.

Astillfurther purpose'is to provide a selector device 01' the type above "described having a spring tensioneddevice tor yieldinglyholding the selector itself in either position at which it has been set against any accidentaldisplacement but still allowing theselector to beeasily manually moved by the shooter. I

A still further purpose is to provide a selector of the general type indicated where the selector works independently of all the other working mechanism of the gun so that the selector does not complicate nor interfere in any way with the other mechanism or its working operation.

Further purposes and advantages of thisinvention will appear from the specification and claims. herein. v

Fig. 1 isa view of the frame and the rear portion of the upper and lower barrels and the forestock of a two-barrel gun of the so-called "over and under type, equipped with the preferred form. of my invention, said view being partly in side elevation and partly in central longitudinal section, the selector device being in its upper position and so adapted to operate the upper firing pin.

Fig. 2 is a view on a much enlarged scale of the breech block and adjacent parts of the gun shown in"Fig.' 1, the selector device being still in its upper position, and the hammer beingat its rebound position, that is the position it takes after thefiring operation and before it has been drawn back or cocked.

Fig. 3 is a horizontal longitudinal section on line 3-3of Fig.2. V V

Fig. 4 is a view substantially similar to Fig. 2 but with the selectordevice moved down to its lowerposition to render operative the lower firing pin which operates against a cartridge in the lower barrel of the gun, dotted lines showing the forward position of the selector. This view also shows the spring plunger that yieldingly holds the selector in either of its two positions. 7

Fig. 5 is an edge elevation of the selector device per so, as a'separate assemblage but as seen in Figs. 2 and '4.

Fig. 6 is a rear elevation of the parts shown in Fig. 5.

Fig. 7 is aside elevation of one of the firing pins and Fig.8 is a front elevation of said firing pin.

Fig. 9 isa. view similar to Figs. 2 and 4 but of a modified form of my invention. In Fig. 9 the selector plate is at lowered position and the enlargement in the form of a plunger movably mounted in the selector plate is shown at its forward position as having driven the lower firing pin forward, and the hammer is also shown in extreme forward position before it has gone back to the rebound position.

Referring to the drawingsrin a more detailed description and first to the form shown in Figs. 1-6, it will be seen that my present invention is illustrated in connection with a so-called "over and 'under gun whereinsolely for illustration and not as a limitation, the top barrel I0 is a rifle barrel and the under or lower barrel ll tending hammer pin 25 with the upper part of said hammer provided with a forwardly directed face 25 which is of considerable extent vertically so as to be to the rear of both the upper firing pin l1 and the lower firing pin 2|. The hammer 24 is slidingly mounted and guided by a longitudinally extending slot 21 cut into the upper portion of the frame for the conventional movement of said hammer. At the forward end of this hammer slot 21 there is provided extending down into the frame immediately to the rear of the breech block I6 another transversely there is slidingly located in the breech block I6 a firing pin l1. Preferably this firin pin consists of a forwardly extending pin I1 and the enlarged head IT. This firing pin is slidingly mounted in the breech block by said breech blockv having extending in from its front face I8 a small longitudinally extending hole l9 just large enough to allow the small pin portion ll of the firing pin to freely slide therein. This hole l9 extends only for a short distance in from the front face of the breech block and there the hole is enlarged and extended to the rear a short distance, and then the hole is'enlarged still further to make a pocket 49 in which easily slides the enlarged head ll" of the firing pin IT. The firing pin is normally yieldingly held in its normal rearward position by a small coiled spring 20 encircling the small end of the firing pin and housed within the intermediate sized hole in which the firing pin is'located. It will be obvious that the forwardend' of the spring takes against the shoulder adjacent the rear end of the small hole l9 and the back end of the spring takes against the forward face of the enlarged head of the firing pin. Vertically spaced below the upper firing pin l1 there is slidingly mounted in the breech block IS the lower firing pin 2| adapted to cooperate with a center fire shell located in the cartridge chamber of the shotgun barrel II. This lower firing pin 2| is constructed similar to the upper firing in and is slidingly located in a similar larger pocket 22 for the enlarged head of the firing pin with the small forward end of the firing pin 2| sliding in a small hole 23 extending through to the front face of the breech block; the two firing pins and their sockets being exactly alike no further detailed description is deemed necessary of said lower firing pin nor its sockets except as hereinafter immediately mentioned.

As the parts are illustrated in the drawings the upper firing pin is mounted with its longitudinal axis parallel to the longitudinal'axis of the upper or rifie barrel l0 and with the firing pin adapted to engage a lower part of the rim of the rim fire cartridge located in the said rifie barrel. The lower firing pin 2| is illustrated andpreferably will be located on a line extending downwardly as it extends forwardly. This arrangement still gets a good striking contact of the hammer to the firing pin with the center fire cartridge and still gets the rearmost portion of the rounded rear head of the' firing pin 2| slightly nearer to the central portion of the rounded rear end of the enlarged portion of the upper firing pin H. The purpose of thus drawing together the rear ends of the firing pins is to reduce the necessary vertical movement of the selector.

On' a line somewhat to the rear of the breech block as heretofore described there is provided the conventional hammer 24 swingingly mounted towards its lower end on the transversely exextending and vertically directed slot 28 for the mounting therein of the selector 29. This selector 29 is of somewhat irregular shape but its detailed construction will be readily understood by referring to the two detailed views thereof Figs. 5 and 6. This selector 29 consists of a flat plate. portion 30 hereinafter called the selector plate. Towards the bottom of this plate 30 there is a laterally projecting ear 3| extending to the right as seen in Fig. 6 and so to the right hand side of the gun. Fromthe right hand side of this ear 3| there is an extension 32 of inverted L-shaped form best seen in Fig. 5 but appearing also in Figs. 1, 2 and 4. This extension projects further down below the line of the bot-' tom of the selector plate 30. The L-shaped form of this extension happens to be made in this particular gun to avoid the transversely extending locking bolt pin and also the locking bolt, this detailed shape being simply an incidental construction for this particular type of gun. The whole purpose of this long extension 32 is to provide a means of manually operating the selector plate 30 low enough down on the right hand side of the frame to be within convenient reach of the shooters finger or thumb on that side of the gun.

On the forward side of the selector plate 30 and towards its upper end there is provided a local enlargement or forwardly extending protuberance 33' and preferably to the rear of this protuberance and at the rear side of the selector plate 30 there will be another enlargement 35 of the selector plate. This rearward enlargement is the preferred and most economical form of constructing the device but the rearward enlargement'is not absolutely essential in all forms of the invention and a construction where this rearward enlargement is not used is within the scope of certain of the claims hereinafter set forth.

In practice and preferably, the forward enlargement 33 is formed by the head of a rivet, the shank of which conveniently passes rearwardly through a hole 34 provided in the selector plate 30 and the portion of the shank of the rivet that extends to the rear of the selector plate is spread out and riveted over forming a rearward enlargement 35 which keeps the said rivet permanently and solidly assembled upon the selector plate 3|).

Suitable means are provided for holding the firing pins l1 and 2| at their proper rearward positions, which positions of these two firing pins are about as shown in Figs. 1, 2 and 4. The means for-so limiting rearward movement of the said firing pins to this proper position conveniently and preferably consist of said firing pins being cut away upon one side, say their left hand side as they are illustrated in the several drawings herein providing a fiat face 36 parallel to the axes of the pins and on the line of a chord of a. cross section of the pin and extending in' from the rear end of the enlarged head of the.

ming pins to'within a short distarice of the front of' saidenlarged portions, and there forming a shoulder 36' and into the I space made by'the face-36 is projected a stop-screw projected in from the lefthand side of the frame l'5 as shown particularly in Fig. 3, so that the inner end of saidstop-screw 31 loosely projects into the space to the'rear of shoulder 36 but allows free forward movement of the said firing pin. It will be understood that the small coiled spring 20 operates to yieldingly retract the firing pins 11 and 2| to the proper rearward position as shown in the-drawings herein and as limited by the said'stop screws'31.

It will now be apparent that when the selector 29 is moved toupward position the selector plate 30 will carry thehead 33 of the attached rivet to the position shown in Figs. 1 and 2, that is immediately 'to the rear of the'upper firing pin II. It will be apparent thatupon manipulating the trigger 46 to release the hammer 24 the hammer-under the'force of its main spring (not shown) will be driven straight forward and its face 26 will engage the rearward end 35 of the rivet and'thereby not only the rivet but the selector plate 30 rigidly connected thereto will be swung forward and at once engage or physically strongly engage the already slightly engaged rearwardly directed rounding head of the upper firing pin I1, and thereby move this firing pin forward-to fire the cartridge in the upper barrel.

As soon as the forwardly driven hammer acting through the selector plate and its rivet-like enlargements thereon 33 and 35 respectively has driven the upper firing pin I1 forward to have its small forward end project through the small passage therefor far enough to strike and indent the lower part of the rim of the cartridge in the upper or rifle barrel I9 enough to fire said cartridge, the hammer 24 will rebound to its so-called reboundposition as shown in Figs. 1 and 2 and the upper firing pin under the tension of the coiled spring 20 about its forward smaller dfametered portion will yieldingly force the said upper firing pin back to its normal position as shown in Figs. 2 and 3, where it is stopped from further rearward motion by the stop screw 31 as already described. This rearward movement of the upper firing pin I1 especially with the hammer 24 having already moved backto its rebound position, will cause the selector 29 including the selector plate 30 to bodily swing the slight distance backward to its normal positionas best shown in Figs. 2 and 3. Such forwardly swung position of the selector and especially of the selector plate 30 is shown in dotted linesin Fig. 4. 7

If thegun is to have its upper barrel, that is, in this case, its rifle barrel, reloaded without firing the cartridge in the lower barrel, then the gun may be broken and the shell from the upper barrel removed and another cartridge supplied the said rifle barrel and the gun again locked; all of these operations will be performed without having to move the firing pin selector from its upperposition as shown in Figs. 1, 2 and 3. Furthermore if the upper barrel is to be again fired the selectoris still in position for such firing of the upper barrel. to be fired or if the lower barrel is to be fired without reloading the upper barrel then the selector will be moved downwardly to its lowered position where, as shown in Fig. 4, the enlargement 33 upon the forward side 'of the selector If however the lower barrel is P plate is substantially 1 opposite the lower firing pin. Thereupon after of course cocking the hammer, the usual pulling of the trigger will release the hammer-24 and it will, under the action of its spring drive strongly forward and upon the hammer striking the rear side of the rearward projection 35, which as already mentioned in this form of my invention is permanently attached to the selector plate 30, will cause the whole selector to bodily swing forward on its pivoted lower end and'cause the forward projection 33 to sharply strike the rear end of the lower firing pin 2| and cause that firing'pins forward end to impinge upon the percussion cap of the center-fire cartridge usually used in the lower or shotgun barrel The means for pivotally supporting the lower end of the extension 32 and for moving the whole selector up or down as already suggested consists of a spacing sleeve '38, the inner end of which bears against the outermost or right hand side of the extension 32 of the selector close to its bottom end, and 'a'threaded rod 39 extending through said sleeve and having its inner end 39 screw-threaded into a threaded hole provided in said lower end of the extension 32. The outer end of said sleeve projects to an operating button or disk 40 located adjacent but spaced slightly by said sleeve from the right hand face of the frame i5. The outer end of the rod 39 has its enlarged head or its outer end countersunk into the outer side of the button to meet the outer end of the sleeve 38,'the outerend of the said rod being provided with a slot for setting up'said screw-"threaded rod as by'a screw driver or other proper tool. The hole through the'rlght hand side of the frame [5 is in the form of a vertically elongated slot 4| as suggested inFig. 4, the length and location of said slot being such as to properly limit the upward or downward movement of the selector 30 by'reason of the sleeve '38 engaging either the upper or the lower end of the said slot M. It will be obvious that manipulation of said button or disk 10 by the fingers or thumb in an upward or downward direction will move the selector bodily to an upward position from'its'lowered position or to a lowered position from its upward position as the case may require. As'this disk is in' plain sight upon the right hand side of the gun frame it will be seen that the shooter can at once tell by a visual inspection why a manual investigation whether the selector is set to'bring into operation'the upper or lower firing pin. It will'thus be seen that the operating disk or button 40 readily'indicates either to the eye or to the hand or fingers of the shooter the exact setting of thefiring pin selector.

Preferably proper means, in practice spring tensioned'means, such as a round-headed plunger 41 engaging the vertically movable'sleeve 38, are provided to insure that the selector will be moved its complete extent of travel to go'either to its raised or lowered position, and such means will also function to yieldingly hold the said selector in its said position against shifting to its other position by rough usage of the gun or from'being shifted from one position to its other position by any light pressure accidentally applied to the button as distinct from a definite hand motion of saidbutton by the shooter. v

Fig. 9 is a view partly in side elevation and partly in longitudinal section'similar to Figs. 2 and 4 of a two-barreled gun'embodying a'modifi- V cation of my invention. In this modified form the-c'onventionalh'ammer H isthe same as before and the upper and lower firing pins l1 and 2| sockets in the breech block are all the same as heretofore illustrated and described and so do notj need any further description and 'even the same numerals for parts that have been heretofore used seem to be most properly applicable. Even the frame of the selector 29 and its selector plate 30 is the same as heretofore illustrated and described except that in place of the permanently located forward extension 33 and rearward extensions 35 already described the enlargement upon the selector plate 33 in my modified form of the invention consists of a rivet-shaped plunger 42. This plunger is really rivet-shaped in that it has an enlarged head 43 in the form of one type of common rivet and the shank 44 of the rivet extends freely slidingly through a round hole 45 provided at the proper point in the selector plate 30 in the same way as in the other form the enlargements 33 and 35 were located.

In this form of the invention the normal position of the rivet-like plunger 42 is with its rear face of its head 43 against the forward face of the selector plate 30, this position of the plunger being brought about by the rearward movement of the separate firing pins under their coiled springs 20. In other words the coiled springs 2|! separately move each of the firing pins to their proper rearward position where they are stopped by the stop screws 31 already described. This rearward movement of the separate firing pins will move the rivet-like plungers 42 back to their normal rearward position with their heads against the front face of the selector plate 30 and with the rearward part of the shank 44 of the plungers extending appreciably to the rear of the rear face of the selector plate 30 and more or less towards the operating face 26 of the hammer 24. It will be now seen that when the hammer is released it will drive forward and as shown in Fig. 9 its operating face 26 will strongly engage the rear end of the shank 44 of the rivet-like plunger and move the rivet-like plunger forward relative to the larger and now substantially permanently located selector 29 and its plate 30, and will move thehead 43 of the plunger forward away from the selector plate 30 and into sharp and impinging engagement with the rear face of the firing pin I! or 2|, according to which position the said selector plate has been moved to. In Fig. 9 the selector plate is shown as in lowered position soas to bring the rivet-like plunger 43 opposite the lower firing pin 2| The position of the parts in this Fig. 9 is that at the completion of the forward drive of the hammer 24 so that the rivet-like plunger 42 is at its forward position and the forward face of its head 44 is in physical engagement with the rounded rear face of the lower firing pin 2| which has had its small forward end projected through the small hole in the front of the firing pin socket and with said forward end pushed far enough front to ,enter to the proper extent into and with the proper force against the percussion cap or member in the center fire cartridge assumed to be used in this lower shotgun barrel.

With this alternative form of my firing pin selector it will be seen that the shooter can at will move the selector to select either the upper or the lower firing pin as he wishes and that the selector can be changed from one position to the other or back again without regard to the position of the other mechanism of the gun. It

together with their mounting pockets or;

will be noted here that the position of the parts in Fig. 9'is the special position where the hammer is shown at its extreme forward position where it in practice. will never be seen by the shooter because the hammer will move from this extreme forward position with lightning-like rapidity back to its normal or rebound position as shown in Figs. 1, 2, 3 and 4. As the hammer thus goes back from its advanced position of Fig. 9 'the plunger 42 will also go back to a position closely against the front face of the selector plate and then the selector may be moved to upward position by proper upward movement of the button 40 and all this without disturbing the other firing pin, it being understood that in this modified form of the invention the selector may :be moved upward and the head of the rivet-like plunger will slide under or to the back of the rounded rear end of the upper firing pin without imparting any forward motion to such firing pin.

What I claim as new is:

1. In a firearm, the combination of a frame having intermediate its ends an upstanding forwardly facing breech block, two spaced barrels movably mounted relative to said frame and breech block and having cartridge receiving chambers with their rear ends butting against said forwardly directed face of the breech block when the gun is in closed position, two firing pins slidingly mounted in the breech block and located and adapted to operatively and separately engage cartridges in the cartridge chambers of said two barrels, resilient means normally urging said firing pins to rearward position, means stopping said rearward movementof the firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for limited movement in said breech block between-the hammer and said two firing pins,-a rivet-like extension in one part of said slider with its head forward of the slider and adapted to be selectively brought opposite one or the other of said firing pins by lengthwise movement of said slider, the shank of said slider extension projecting rearwardly of the slider and adapted to be struck and with said slider. to be driven forwardly by the forward movement of the hammer and means operatively connected to said slider and extending to a point outside the frame for manually moving said slider.

2. In a firearm, the combination of a frame having intermediate its ends an upstanding forwardly facing breech block, two vertically spaced barrels movably mounted relative to said frame and breech block and having cartridge receiving chambers with their rear ends butting against said forwardly directed face of the 'breech block when the gun is in closed position, two firing pins slidingly mounted in the breech block and located and adapted to operatively and separately en-.

gage cartridges in the cartridge chambers of said. two barrels, resilient means normally urging said firing pins to rearward position, means stopping said rearward movement of the firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for upright movement in said breech block between the hammer and said two firing pins, a rivet-like extensionin the upper part of said slider with its head forward of the slider and adapted to 'be selectively brought opposite one or the other of said firing pins by movement of said slider, the shank of said slider extension projecting rearwardly of the slider said forwardly directed face of thebreechblock when the gun is in'closed position, two firing pins slidingly mounted in the breech block and located and adapted to operatively and separately engage cartridges in the cartridge chambers'of said two barrels, resilient means normally urging said firing pins to rearward position, means stoppingsaid rearward movement of the firing pins atrearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for limited movement in said breech block between the hammer and said two firing pins, a rivet-like extension in one part of said slider with its head forward of the slider and adapted to be selectively brought opposite one or the other of said firing pins by movement of said slider, the shank of said slider extension projecting rearwardly of the slider and adapted to be struck and with said slider driven forwardly by the forward movement of the hammer and means operatively connected to said slider and extending to a point outside the frame for manually moving said slider, and a spring-tensioned roundheaded plunger adjacent a part of said means for manually operating the selector andadapted to be depressed on movement of the-selector slider from either ofits positions to its other position.

4. In a firearm, the combination of a frame .having intermediate its ends an upstanding forwardly facing breech block, two spaced barrels movably mounted relative to said frame and breech block andhaving cartridge-receiving 1' chambers with their rear ends butting against said forwardly directedface of the breech block when the gun is in closed position, two firing pins slidingly mounted in the breech block and located and adapted to operatively and separately engage cartridges in the cartridge chambers of said two barrels, resilient means normally urging said firing pins to rearward position, means stopping said rearward movement of the firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for limited movement in said breech block between the hammer and said two firing pins, a rivet-like extension in one part of said slider with its head forward of the slider and adapted to be selectively brought opposite one or the other of said firing pins by lengthwise movement of said slider, said slider and its attached projection being driven forwardly by the forward movement of the hammer and means operatively connected to said slider and extending to a point outside the frame for manually moving said slider.

5. In a firearm, the combination of a frame having intermediate its ends an upstanding forwardly facing breech block, two spaced barrels movably mounted relative to said frame and breech block and having cartridge-receiving chambers with their rear ends butting against said forwardly directed face' of the breech block when the gun is inclosed position, two'firin'g pins slidingly mounted in the'breech block and located and adapted to'operatively and separately engage: cartridges in' the cartridge chambers of said two barrels, resilient means normally urging 'said firing pins to rearward position, means stopping said rearwardmovement of the firing pins at rearward position, a single hammer movably -mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for limited movement inlsaid breech block between the hammer and said two firing pins; a forwardly extending pro- .jection on: one part of 'said slider adapted to be 'selectively'brought opposite one orthe other of said firing pins by lengthwise movement of said slider, sai'd 'slider and its saidforward projection being drivenforwardly by the-forward movement of the hammer and means operatively con- 'nected'to said slider and extending to a point outside the frame for manually moving said slider.

6.'In a firearm, the combination of 'a frame having intermediate itsends an upstanding forwardly facing breechblock, two vertically spaced barrelsmovably mounted relative to-s'aid frame and breach-block and having cartridge receiving chambers with theirrear ends butting against said forwardly directed face of the breech block when the gun is in closed position, two firing pins slidingly mounted in the breech block and located and adapted tooperatively and separately engage cartridges inthecartridge chambers of said two barrels, resilient means normally urg-' ing said firing pins to rearward position, means stopping said rearward movement of the firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for upright movement in said breech block between the hammerand said two firing pins, a forwardly extendingprojection on the upper part of said slider adapted-to be selectively brought opposite one or the other of said firing pins by lengthwise movement of said slider, said slider and its said forward projection being driven forwardly by the forward movement of the hammer and means operatively connected to said "slider andextending to a point outside'the frame'for manually moving saidslider.

7. In a firearm, the combination of a frame having intermediate its ends an upstanding forwardly facing breech block, two vertically spaced barrels movably mounted relative to said frame and breech block and having cartridge receiving chambers with their rear ends butting against said forwardly directed face of the breech block when the gun is in closed position, two firing pins slidingly mounted in the breech block and located and adapted to operatively and separately engage cartridges in the cartridge chambers of said two barrels, resilient means normally urging said firing pins to rearward position, means stopping said rearward movement of the firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for upright movement in said breech block between lengthwise movement of said slider, said slider and its said forward projection being driven forwardly by the forward movement of the hammer and means, operatively connected to said slider and extending to a point outside the frame for manually moving said slider, and a spring-tensioned, round-headed plunger adjacent a part of said means for manually operating the selector and adapted to be depressed on movement of the selector slider from either of its positions to its other position.

8. In a firearm, the combination of a frame having intermediate its ends an upstanding forwardly facing breech block, two spaced barrels movably mounted relative to said frame and breech block and having cartridge receiving chambers with their rear ends butting against said forwardly directed face of the breech block when the gun is in closed position, two firing pins slidingly mounted in the breech block and located and adapted to operatively and separately engage cartridges in the cartridge chambers of said two barrels, resilient means normally urging said firing pins to rearward position, means stopping said firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for limited longitudinal movement in said breech block between the hammer and said two firing pins, a plunger mounted in one part of said slider with a back and forward movement and having its front end adapted to be selectively brought opposite one or the other of said firing pins by movement of said slider, the rear end of said plunger extending rearwardly ofthe slider and adapted to be struck and driven forward by the forward movement of the hammer, and means operatively connected to said slider and extending to a point outside the frame for manually moving said slider.

9. In a firearm, the combination of a frame having intermediate its ends an upstanding forwardly facing breech block, two vertically spaced barrels movably mounted relative to said frame and breech block and having cartridge receiving chambers with their rear ends'butting against said forwardly directed face of the breech block when the gun is'in closed position, two firing pins 'slidingly mounted in the breech block and located and adapted to operatively and separately engage cartridges in the cartridge chambers of said two barrels, resilient. means normally urging said firing pins to rearward position, means stopping said firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said. hammer, a slider movably mounted for upright movement in said breech block between the hammer and said two firing pins, a plunger mounted in the upper part of said slider with a back and forward movement and having its front end adapted to be selectivelybrought opposite one or the other of said firing pins by movement of said slider, the rear end of said plunger extending rearwardly of the slider and adapted to be struck and driven forward by the forward movement of the hammer, and means operatively connected to saidslider and extending to a point outside the frame for manually moving said slider.

10. In a firearm, the combination of a frame having intermediate its ends an upstanding forwardly facing breech block, two spaced barrels movably mounted relative to said frame and breech block and having cartridge-receiving chambers with their rear ends butting against said forwardly directed face of the breech block whenfthe gun is in closed position, two firing pins siidingly "mounted in the breech block and located and adapted to operatively and separately engage cartridges in the cartridge chambers of said two barrels, resilient means normally urging said firing pins to rearward position, means stopping said rearward movement of the firing pins at rearward position, a single hammer movably mounted relative to said breech block, a single trigger operatively connected to said hammer, a slider movably mounted for limited lengthwise movement in said breech block between the hammer and said two firing pins, a rivet-like extension in one part of said slider with its head forward of the slider and adapted to be selectively brought opposite one or the other of said firing pins by lengthwise movement of said -slider,-therear end of said slider extension projecting rearwardly of the slider and adapted to be struck and driven forwardly by the forward movement of the hammer and means operatively connected to said slider and extending to a-point outside the frame for manually moving said slider.

WILFRED I. SMITH.

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