US1147737A - Single-trigger firearm. - Google Patents

Description

A. E. LARD.

SINGLE TRIGGER FIREARM.

APPLICATION FILED uov.25, 190a. RENEWED APR. 8. 1914.

Patented July 27, 1915.

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A. E. LARD.

SINGLE TRIGGER FIREARM.

APPLICATION FILED uov.2s. I908. RENEWED APR- 8, 1914.

1,147,737. Patented July 27, 1915.

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A. E. LARD.

SlNGLE TRIGGER FIREARM. APPLICAHON FILED NOV. 25, 1908. nzmwzn APR. 8, 1914.

coLuMmA PLANOGRAPH CO-.WASH1NGTQN. 1.).C,

ALLAN E. LARD, OF WASHINGTON, DISTRICT OF COLUMBIA.

SINGLE-TRIGGER FIREARM.

Specification of Letters Patent.

Patented July 27, 1915.

Application filed November 25, 1908, Serial No. 464,489. Renewed April 8, 1914. Serial No. 830,542.

To all whom it may concern:

Be it known that I, ALLAN E. LARD, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in SingleTrigger Firearms, of which the following is a specification.

My present invention pertains to improvements in single-trigger firearms, the construction and advantages of which will be hereinafter set forth, reference being had to the accompanying drawings, wherein:

Figure l is a side elevation of the firing mechanism, with the parts in position ready for firing the first barrel, the lock-carrying plates being omitted for the sake of clearness; Fig. 2 a transverse vertical sectional view taken on the line aa. of Fig. 1, the lock plates and scars being shown in posi tion; Fig. 3 a side elevation, partly in section, of the firing mechanism, as viewed fromthe side opposite that shown in Fig. 1; Fig. eta side elevation, illustrating the position of the parts as they appear at the moment of discharge of the first barrel; Fig. 5 a similar View, showing the position of the parts preparatory to the discharge of the second barrel; Fig. 6 a horizontal sectional view, taken on the line bb of Fig. 3; Fig. 7 a detail view of one form of the spur lever; Fig. 8 abottom plan view thereof; Fig. 8 a perspective view of a modified form of the spur lever; Fig. 9 a detail view showing another modified form of the spur lever; Fig. 10 a view showing a still further modification of the spur lever; Fig. 11 a perspective view of the check-stud; Fig. 12 a similar view showing a modified form of the check-stud; Fig. 12 a top plan view illustrating a still further modification of the check-stud; Fig. 13 a perspective view of the selective lever; Fig. 1 1 a perspective View of the trigger and the spur lever; Fig. 15 a like view of the slide which is employed to operate the selective lever, a portion of the trigger and the spring which is common to both of said parts; and Fig. 16 a perspective view of the firing-plate and the selective lever which is carried thereby.

The construction herein set forth may be termed an improvement upon the mechanism shown in my copending application filed July 2%, 1903, Serial No. 166,898, now Letters Patent No. 1,011,972, issued under date of December 19, 1911.

The main improvements embodied in this application and forming the basis thereof may be stated as follows: First, an improved bearing for the spur lever, which permits said lever to be reset by the action of the scars, thus doing away with the necessity of employing a setting mechanism operated through the set rod. Furthermore, such construction prevents the parts from gumming, wearing or becoming indented and thus interfering with the proper functioning of the mechanism; second, providing a new form of face for the check-stud, whereby the object just set forth will be more surely accomplished; third, milling out or reducing certain portions of the mechanism, more specifically, the trigger arm, the selective slide, and spur lever, whereby the bearing surfaces afforded by said parts will be re duced and the clogging of the mechanism by rust, dirt or the like, will be minimized; fourth, an improved method of connecting the spur-lever with its spring; fifth, providing a construction whereby the firing-plate may be readily positioned upon the triggerplate of an ordinary double-barrel gun in which a single trigger mechanism is to be substituted without in any manner altering the two-trigger trigger-plate or the box extending upwardly therefrom; and sixth, providing a new form of selective slide. \Vith these and other improvements in view, a detailed description of the invention will be given.

In the drawings, 1 denotes the triggerplate, which has the usual trigger-box or lug 2, provided with the vertically-disposed slots 3 and 1, see Fig. 6, which as employed in double-barrel. guns is for the reception of separate triggers. The lock- plates 5 and 6 and the scars 7 and 8 are illustrated in Fig. '2. Fulcrumed upon a pin 9, extending horizontally through the box 2, is the trigger 10, provided with an upwardly-projecting arm 11, the upper end of which is pivotally connected to a link 12, to which in turn is pivoted the upper end of a spur-lever 13, said spur-lever being fulcrumed upon a pin 14: extending laterally from an upwardlyprojecting arm 15 of the firing-plate 16. In order that the firing-plate may be secured to the trigger-plate of the ordinary doublebarrel gun without the necessity of remodeling said trigger-plate, or in other words, without the removal of the central partition 17, Fig. 6, the forward end of the firingplate is reduced so that said end may pass into the slot 4: and be secured in position upon the pivot-pin 9. The firing plate is provided with laterally-extending lugs 18 and 19, which are located adjacent to the rear end of and below a transverse slot 20 formed in the firing-plate, in which slot is pivotally mounted a selective lever 21. The rear end of said lever is provided with fingers 22, one of which normally overlies one or the other of the lugs 18, 19 according to the position of the selective lever, the parts being so proportioned that one finger is withdrawn from over its lug as the opposite finger is thrown outwardly over its lug into position below the sear, as shown in Fig. 2. To properly position said lever a slide, shown in detail in Fig. 15, is employed. The slide comprises a combined cover and push-plate 23, formed at its opposite ends with serrated projections 24: and 25, by means of which the plate may be moved in one or the other direction; a body portion 26 which fits in a slot formed in the trigger plate; and anupwardly-projecting arm 27 which has an outwardly and downwardlyeXtending finger 28 formed thereon. lVhen the parts are positioned, the arm 27 lies closeagainst the selective lever, and according to its position contacts with one or an other of the cam faces 29, 30, see Figs. 6 and 13, and as a consequence throws the selective lever to one or the other of its extreme positions, thereby bringing one of the fingers 22 into operative relation with one or the other of the sears 7, 8.

A spring struck up out of sheet metal and 'provided with two arms 31 and 32 (see Fig. 15) is secured to the trigger-plate, the arm 32 being provided with an inverted V- shaped projection at its free end, which cooperates or functions with the end of the downwardly-projecting finger 28 and serves to hold the slide in one or the other of its adjusted positions, the finger passing to one or the other side of said V-shaped projection. The free end of the opposite arm 31 bears upon a projection formed upon the trigger and serves to depress the same.

As will be seen upon reference to Fig. 13, in which the selective lever is shown in detail, the central portion thereof is thinned or cut away so that said lever has but a relatively slight bearing at each end on the walls of the slot or opening in which it is mounted. By reason of such relatively small or narrow bearing-points it may be readily moved or shifted and the accumulation of dust,- rust or the like will not prevent its operation. So, too, the trigger and the upwardly-projecting arm 11 thereof will be reduced upon that side which stands adjacent to the arm 15, as best shown in Fig. 14, so as to provide a clearance and avoid the accumulation of dust, rust or the like, which would prevent such parts from func tioning properly.

The spur lever, at a point belowthe pin or stud 14 upon which it is fulcrumed, is provided with a transverse opening 33, with which communicates a smaller opening 34, see Figs. 1 and 14, said latter openingebeing formed in the under face of the spur lever and receiving the upper end of a wire spring 35. The lower end of the springis provided with a coiled section through which is passed a screw 36, the screw being secured in the.

firingplate. The spring is prevented from turning about said screw by having its lower end passed into an opening 37 formed in the firing plate adjacent to the screw, as clearly shown in Fig. 1. The spring serves to throw thelower end of the spur lever rearwardly. This form of spring has been found highly efficient, and cannot be readily displaced by a jar or by a careless user, who frequently inserts a screw-driver or like tool into the gun for the purpose of removing the lefthand lock plate after the ri ht-hand plate has been removed. In the construction shown in my application above mentioned, in which the upper end of the spring is bent laterally and projects into an opening, as the opening 33, the spring may be displaced in the manner just set forth. The upper end of the spring has but a slight bearing upon the edge where the two openings33, 34 coincide, and is very sensitive in its action. The pres ent construction is also advantageous over the former construction in that it does away with the bend in the upper end of the spring, making its formation simpler and producing a spring less liable to break.v

The lower end of the spur lever in the present form is provided with means, such as a projecting member, whereby it may be readily moved off of the check-stud through the action of the sears when the gun is broken and the sears are set. Said means also provides against the wear and gumming of the parts and consequent imperfect functioning of the spur lever. In the preferred construction of spur lever I form an opening or recess in the lower end thereof and mount a hardened steel ball 38, therein, see Fig. 7, the ball being held in position by making a series of indentations adjacent to the ball by a punch or the like, as clearly shown in Fig. 8. This holds the ball in place but allows it to revolve and provides a rounded hard surface, which contacts with the checkstud 39, which is mounted in the triggerplate. Preferably the upper face of the check-stud will be hardened and formed with a series of transversely rounded ridges,

as shown in Fig. 11, which ridges, while holding the spur-lever in the position shown in Fig. 5 or in that position in which the lever rests upon the check-stud preparatory to the firing of the second barrel, will nevertheless permit the spurlever to be moved rearwardly with but slight force, or that exerted by the sear springs when the gun is broken. Furthermore, such construction prevents the indenting of the upper face of the check-stud, which would occur upon the impact of the lower end of the spur-lever upon the check-stud after the firing of the second barrel, or when the spur lever comes to position upon the check-stud after the firing of the first barrel or the passing of the spur-lever from the position shown in Fig. 4: to that shown in Fig. 5. Instead of employing a ball, the lower end of the spur-lever may be drilled out and a rod a0, having a rounded end and provided with seats or depressions 41, may be used. The rod will be held in position by forcing the metal of the spur lever into the seats or depressions 41, as indicated in Fig. 9. In Fig. 8 a still further modification is shown, in which instead of employing a ball a roller 38 is mounted in the lower end of the spur-lever, the periphcry of the roller being preferably slightly rounded or curved in line with its axis.

In so far as the generic invention is concerned, the lower end of the spur-lever may be rounded and hardened, such construction being illustrated in Fig. 10. It is to be understood, however, that such construction is not the preferred one, and is not as reliable as that shown in Figs. 7 to 9 inclusive.

The spur l2 of the spur-lever is adapted to coact with a locking-post l3, secured to and extending upward from the triggerplate, as in the application above mentioned.

In Fig. 12 a modification of the check-stud is shown. Instead of having the form of a post screwed directly into the trigger-plate, the check portion id is formed upon the outer end of a spring arm d5 which may be secured in position upon the trigger-plate by a screw passing through a hole l6. The arm may be bent so as to bring the check surface into proper position with relation to the spur-lever and thereafter hardened so as to maintain its proper position with reference to said lever. In Fig. 12 another modification of the check-stud is shown. In this instance the upper face of the stud is provided with a series of intersecting channels or grooves 44 which, of course, will form a series of rounded knobs or projections e49.

As in my former application, I employ a safety weight, l7, to prevent the double discharge of the arm. Said weight is provided with a downwardly-projecting arm as which passes into and through a slot or opening formed in the rear end of the firing-plate and is pivotally connected thereto by a pin 49. A spring 50, the forward end of which is seated in a recess formed in the upper face of the firing-plate, while the rear end thereof passes into a deep seat or recess in the weight, tends to throw the weight rearwardly. To the lower end of the arm i8 is secured a pin 51 which extends laterally to a point in line with the path of movement of the spur-lever, and when the arm is fired the weight is thrown forwardly and as a consequence the pin 51 will contact with the under face of the spur-lever and throw itinto locking position with reference to the locking post a3 until the arm has assumed its normal position. The weight prevents the involuntary discharge of the arm, due to the pull on the trigger caused by the rebound or the forward movement of the gun when the first barrel is discharged.

It is to be noted that in the construction above set forth no set rod is employed to position the parts, the spur-lever being moved to its proper position by the pressure which is exerted by the scars. Under the former construction it was somewhat ditli cult, if not impossible, to accomplish this, owing to the presence of rust, gum or the like, which collected upon the parts, and to the indentation which the end of the spur lever eventually makes in the upper face of the check-stud. This indentation is caused by the impact of the spur-lever upon the top of the check-stud during the recoil incident to firing the second barrel.

As before noted, in the present construction the sear springs exert a limited amount of power, but if the pressure required to reset the firing-plate be too great for the sear springs, then the spur-lever will remain upon the top of the check-stud, thus preventing one of the sears from entering its notch in the hammer. A twopounds pressure, for instance, on the lugs would cause the spur-lever to slip off of the checkstud if the contacting surfaces were of the proper form and shape, but if these surfaces gum, rust, or change their form by reason of indentation then it requires a greater pressure than the sear springs are capa le of exerting to remove the spur-lever from the check-stud. The spur-lever must, not, however, slide off of the check-stud too easily; otherwise, it might fail to stay on the checkstud or in the position shown in Fig. 5, after the first barrel is discharged. The arrangement above set forth has been found in practice to admirably accomplish the d sired results (particularly where the ball 38 is employed), permitting the sear springs to move the spur-lever from the stud when the gun is cocked and yet holding the spurlever in the position shown in Fig. 5, preparatory to the discharge of the second barrel. The rounded contact surfaces of the lower end of the spur-lever and the upper face' of the check-stud will not become in-' dented, owing to the fact that the two hardened ball-like surfaces cause the spur-lever to begin to slide or deflect before any great amount of impact is exerted; nor will the from the trigger-plate; a check-stud; and

.0, loosely upon the upper face of the checka member pivotally connected to the firingplate, the lower end of said member being provided with a rounded projection adapt ed to contact with and bear directly but stud. 1

2. In a firearm, the combination of a trigger plate; a firing-plate pivotally mounted thereon; a post extending upwardly from a the trigger-plate; a check-stud; a member pivotally connected to the firing-plate; and means carried at the lower end of said memher for holding the same upon the checkstud under certain positions of the mechanism and permitting the same to be readily removed therefrom.

3. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a check-stud provided with a series of rounded projections;

a member pivotally connected to the firingplate; and a rounded member carried at, the lower end of said pivoted member and adapted to I contact and coact with the rounded projections on the check-stud to properly position the parts.

4. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a check-stud; a member pivotally connected to the firingplate; and a member provided with a rounded face secured in the lower end of the firstmentioned member and adapted to coact with the upper face of the check-stud.

5. In a firearm, the combination of a trigger-plate; a firingplate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a check-stud; a member pivotally connected to the firingplate; and a ball mounted in the lower end of the member and adapted to coact with the check-stud.

6. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a check-stud provided with a series of rounded projections upon its upper face; a member pivotally connected to the firing plate; and a member secured in the lower end of said first-mentioned member and adapted to coact with the rounded projections upon the check-stud.

7. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a check-stud provided with a plurality of rounded projections upon its upper face; a member pivotally connected to the firing-plate; and a ball secured in the lower end of said member and adapted to contact with the rounded projections on the check-stud.

8. In a firearm, the combination of a trigger-plate; a firing-plate mounted thereon; a trigger; a spur-lever pivotally connected to the firing-plate and likewise connected to the trigger; a locking-post; and a check-stud adapted to coact with the lower extremity of the spur-lever, said check-stud comprising an arm adapted to be secured at one end to the trigger-plate and provided with an undulating check surface on its upper face at the outer free end thereof.

9. In a firearm, the combination of a trigger-plate; a firingplate pivotally mounted thereon; a trigger pivotally mounted upon the trigger-plate; a spur-lever pivotally connected to the firing-plate and likewise pivotally connected to the trigger; a lockingpost; and a check-stud, said stud comprising an arm adapted to be secured at one end to the trigger-plate, the opposite end of the arm being provided with a series of rounded projections or ridges. I

10. In a firearm, the combination of a trigger-plate; a pair of sears; a firing-plate; means carried by the firing-plate adapted to coact with said sears; a spur-lever pivotally connected to the firing-plate; a locking-post extending upwardly from the trigger-plate; a check-stud carried by the trigger-plate; and means carried by the spur-lever upon its lower end and contacting with the upper face of the check-stud for permitting the sear springs to move the firing-plate clownwardly and throw the spur-lever off of the I check-stud.

11. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a spur-lever pivotally connected to the firing-plate; a check-stud provided with a series of transversely-disposed ridges, the upper edges of which are rounded; a locking post extending upwardly from the trigger-plate; and a rounded bearing provided at the lower end of the spur-lever and adapted to contact with the ridges of the check-stud. I

12. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a spur-lever pivotally connected to thefiring-plate; a check-stud provided with a series of transversely-disposed ridges,

the upper edges of which are rounded; a locking-post extending upwardly from the trigger-plate; and a ball mounted in the lower end of the spur-lever.

13. In a firearm, the combination of a trigger-plate; a trigger-box extending upwardly therefrom and provided with a pair of slots; a trigger, the forward end of which extends into one of said slots; a firingplate standing adjacent to the trigger, the forward end of the firing-plate being reduced and entering the second slot; a pin upon which said trigger and firing-plate are pivoted; a spur-lever pivotally connected to the firing-plate; a check-stud carried by the triggerplate; and a locking-post arranged in rear of the check-stud.

1%. In a firearm, the combination of a trigger-plate; a trigger-box extending upwardly therefrom and provided with a pair of vertically-disposed slots; a trigger, the forward end of which extends into one of said slots; a firing-plate standing adjacent to the trigger, the forward end of said plate being reduced and entering the second slot; a pin passing through the trigger-box and forming the pivot for the trigger and firingplate; members carried by the firing-plate adapted to coact with the sears of the firearm; a selective lever pivotally mounted in a slot extending horizontally through the firing-plate; means for positioning said lever; a spur-lever pivotally mounted upon the firing-plate; a check-stud; and a locking-post.

15. In a firearm, the combination of a trigger-plate; a trigger; afiring-plate standing adjacent to the trigger, that portion of the trigger which lies next adjacent to the firing-plate being somewhat reduced in thickness in order to provide clearance between the parts; members carried by the firingplate adapted to coact with the sears of the firearm; a selective lever mounted in said plate and adapted to be projected over one or the other of said members; a spurlever; a check-stud, adapted to coact with said spur-lever; and a locking-post.

16. In a firearm, the combination of a trigger-plate; a trigger mounted thereon; a firing-plate also mounted upon the triggerplate, said firing-plate being provided with a horizontally-disposed slot; a lug extending outwardly from each side of the firingplate and adapted to coact with the sears of the firearm; a selective lever pivotally mounted in the firing-plate, the body of the lever being reduced in thickness so as to provide clearance between said reduced portion and the walls of the slot; a spur-lever; a check-stud; and a locking-post.

17. In a firearm, the combination of a triggenplate; a trigger pivotally mounted thereon, said trigger being provided with an upwardly-projecting arm; a firing-plate pivot-ally mounted upon the trigger-plate and likewise provided with an upwardlyprojecting arm, the parts being so proportioned as to provide clearance between the arms; a pair of lugs extending outwardly from said firing-plate and adapted to coact with the sears of the gun; a selective lever pivotally mounted in a horizontallydisposed slot formed in the body of the firing-plate, the central portion of the lever being reduced in thickness so as to provide clearance between said portion and the walls of the slot; a spur-lever pivotally connected to the upper end of the arm of the firingplate; a link connecting the upper end of the spur-lever and the arm of the trigger; acheck-stud adapted to coact with the spurlever; and a locking-post likewise adapted to coact with the spur-lever.

18. In a firearm, the combination of a trigger-plate; a firing-plate mounted thereon; a trigger; a spur-lever pivotally mounted upon the upper portion of the firingplate, said lever being provided with an opening in the forward face thereof; connections between said spur-lever and the trigger; a spring secured to the firing-plate and having its upper end extending into the opening formed in the spur-lever; a checkstud adapted to coact with the spur-lever; and a locking-post.

19. In a firearm, the combination of a trigger-plate; a trigger mounted thereon; a firing-plate; a spur-lever pivotally connected to the firing-plate, said lever being provided with a transverse hole or opening formed therein at a point below the pivotal connection to the firing-plate and with a second hole or opening extending from the under face of the lever to the firstanentioned hole or opening; connections between the upper end of the spur-lever and the trigger; a spring secured to the firingplate and having its upper end extending through the second named hole and projecting into the first-- named hole in the spur-lever; a check-stud; and a locking-post.

20. In a firearm, the combination of a trigger-plate; a trigger mounted thereon; a firing-plate also mounted upon the triggerplate; a spur-lever pivotally mounted upon the upper end of the firing-plate, provided with an opening extending transversely through the same at a point below the pivotal connection with the firing-plate and with a second hole extending inwardly from the forward lower face of the spur-lever and terminating in the first-named opening; a wire spring secured at its lower end to the firingplate, its upper end projecting through the second-named opening and terminating in the first opening; a checlcstud; and a locking-post.

21. In a firearm, the combination of a triggenplate; a trigger mounted thereon; a

firing-plate likewise mounted upon the trigger-plate, said firing-plate being provided with a horizontally-disposed slot; a pair of lugs extending outwardly, one from each side of said firing-plate; a selective lever pivotally mounted in the slot, adapted to be thrown into operative relation with one or another of said lugs; a slide mounted in a slot formed in the trigger-plate adjacent to the firing-plate, said slide being adapted to cooperate with the selective lever to throw the lever into one or another position, the slide being formed with a downwardly-pro jecting fin er; a spring coacting with the finger on t e slide and serving to hold it in one or another of its adjusted positions and likewise to hold it in its position in the slot aforesaid; a spur-lever pivotally mounted upon the firing-plate; a check-stud; and a locking post. I

22. In a firearm, the combination of a trigger-plate; a trigger mounted thereon; a firing-plate likewise mounted upon the trigger-plate, said firing-plate being provided with a horizontally-disposed slot extending therethrough; a lug extending outwardly from each side of the firing-plate, at a point below the slot; a selective lever pivotally mounted in the slot, adapted to be moved into operative relation with one or the other of said lugs; a slide; an arm carried there by and standing adjacent to the selective lever and adapted, when moved, to throw the lever into one or another of its positions, said arm being provided with a downwardlyextending finger; and a spring provided with twoarms, one of said arms bearing upon the trigger and the other being provided with an inverted V-shaped projection adapted to coact with the finger of the arm and to hold it in one or another of its adjusted positions.

23. In a firearm, the combination of a trigger-plate; a trigger pivotally mounted thereon; a firing-plate likewise mounted I upon the trigger-plate, said firing-plate being provided with a horizontally-disposed slot; a lug extending outwardly from each side of the firing-plate; a selective lever mounted in the slot and adapted to be thrown into operative relation with one or the other of said lugs; a slide mounted adjacent to the lever, said slide being provided with a downwardly-projecting finger; a combined push and cover plate secured to the lower portion of the slide and underlying the trigger-plate, said push plate being provided with serrated projections at opposite ends; a spring secured to the trigger-plate, said spring having two arms, one of which rests upon the trigger and moves the same downwardly, while the opposite arm is provided with an inverted V-shaped projection adapted to coact with the finger upon the slide; a spur-lever pivotally connected to the firing-plate; a check-stud; and a locking-post, both adapted to cooperate with the spur-lever.

24. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a checkstud; a spur-lever pivotally connected to the firing-plate; and a member mounted in the lower end of the spur-lever, said member being free to roll and adapted to coact with the check-stud.

'25. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a checkstud having a series of rounded projections upon its upper face; a spur-lever pivotally connected to the firing-plate; and a member mounted in the lower end of the spur-lever, said member being free to rotate or roll and adapted to coact with the rounded projections upon the check-stud.

26. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a checkstud provided with a series of rounded projections upon its upper face; a spur-lever pivotally connected to the firing-plate; and a ball mounted in the lower end of the spurlever, said ball being free to rotate in its seat and adapted to coact with the checkstud.

27. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a checkstud having a series of intersecting grooves formed upon its upper face, thereby forming a series of projections; a spur-lever pivotally connected to the firing-plate; and a member mounted in the lower end of the spur-lever, said member being free to rotate or roll and adapted to contact with the projections formed upon the check-stud.

28. In a firearm, the combination of a trigger-plate; a firing-plate pivotally mounted thereon; a fixed post extending upwardly from the trigger-plate; a checkstud having a series of rounded projections formed upon its upper face, said projections 7 trigger-plate; a trigger pivotally mounted thereon; firing mechanism controlled by said trigger; a selective lever carried by the firlng mechanism; a slide provided with an upwardly-extending arm, the arm working in a slot formed in thetrigger-plate; a fingel, extending downwardly from the upname to this specification in the presence wardly-extending portion of the arm; and of two subscribing witnesses.

a spring serving to hold the slide and arm ALLAN E LARD in one or another of their adjusted positions and also to hold them against removal from \Vitnesses:

the slot in the trigger-plate. HORACE A. DODGE,

In testimony whereof I have signed my FANNIE VVIsE.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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