US1519589A - Single-trigger fire mechanism for double-barrel guns - Google Patents

Description

me. w. 1924. 1,519,589

E. E. MILLER SINGLE TRIGGER FIRE MECHANISM FOR DOUBLE BARREL GUNS Filed May 5, 1923 2 Sheets-Sheet 1 Vi/e i Beg, 16, E924.

- 1,519,589 E. E. MILLER 7 SINGLE TRIGGER FIRE MECHANISM FOR DOUBLE BARREL GUNS Filed May 5, 1925 2 Sheets-Sheet 2 47g 2 6 J wilt ng-01:11: 4 67 ggunmmulm Patented Dec. 16, 1924.

I cam s'rAss ELMER MILLER, or MILLERSBURG, PENNSYLVANIA.

SINGLE-TRIGGER FIRE MECHANISM FOR- DOUBLE-BARREL GUNS.

Application filed-May 5, 1923.

T0 cZZ whom it may concern:

Be it known that I, IGLIiiER E. Miminn, a citizen of the United States, residing at Millersburg, in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in Single-Trigger Fire Mechanisms for Double-Barrel Guns, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates tosingle trigger fire mechanisms for double barrel guns.

An ii'nportan-t object of the invention is to provide a device of this type wherein the trigger mechanism may be set to fire either barrel and upon a second pull upon the trigger acting to fire the other barrel.

A further object of the invention is to provide in trigger mechanisms of this character a trigger having a primary and secondary movement which is substantially continuous, the successive operation of the trigger of that type generally referred to as double firing being positively prevented by mechanism associatedwith and carried by the trigge' and operated by. a rebound of the gun.

A further object of the invention is to provide an inertiacontrol of this character which serves not only toprevent double firing by recoilope-ration but which serves as a positive stop during the initial operation of the trigger tolimit the movement thereof.

A further object of the-invention is to provide a device of this character in which both the trigger mechanism and operating mechanism for the trigger mechanism are simplified to the greatest possible extent.

A further object of the invention is to provide in combination with mechanism of this character setting mechanism inoperable to effect a change of select-ion after one bari'el of the gun has been fired until the gun has been recocked.

A further object of the invention is to provide a device of this character which is extremely simple and which may be applied to practically all of those types of guns the sears of which are provided with lugs overhanging the trigger mechanism by means of which they may be tripped.

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose-0t illus- Serial No. 636,854.

tration is shown a preferred embodiment of my invention and Wl16r61IlI'- Figure 1 IS a side elevation of the breech mechanism of a. double barrel gun, the stock J being removed and parts being broken away, the gun being shown in position for firing the first barrel;

Figure 2 is a view similar to that shown in Figure 1, the gun being shown. with the parts in solid lines in the position assumed after firing the first barrel and after the recoil from the shoulder, and in dotted lines in the position assumed during the recoil of the gun from the-charge andafter the Figure 6 is a detached view of the trigger and control mechanism showing the positions thereof'a-fter both barrels have been fired;- v I 1 Figure 7 is a sectional view takenthrough the trigger car r'iedcam or inertiacontrol member; and v I Figure 8. is-a perspective view of the control plate carried by the trigger. 1

Referring now more particularly to the cl'i'aa'viiigs, t lie numeral 10 indicates a trigger plate of a breech mechanism, 11 a trigger mount-upon the upper surface of" the plate embodying space-d arms-12 between which extends the forward end of a trigger 13 havingits forward end pivoted to these arms, as at 14, and operatingthrough a slot 15 formed in the trigger plate. The numerals 16 and 17 designate sears extending rearwardlyfrom the breech plates 18 to which they are pivot-ed and having their forward ends pressed upwardly by springs: 19,

that they'will engage against shoulders 20 formed upon-hammers! 21 when the-hanimore are cocked to hold these hammers in a cocked position. The shoulders 20 are of the usual construction and the only change "forn'ied made in the construction of the hammer is to provide the same, adjacent the shoulders 20 thereof, with lugs 22 engaging the scars 16 and 17 when the hammer is in the tired position to hold the rear end of the sear elevated a greater distance than it ordinarily would be. The numeral 23 designates a vertically disposed plate secured to the trigger plate rcarw ardly of the trigger 13 upon which is pivoted a substantially vertical lever 24, the lower end of which extends adj acent the side face of the rear end of the trigger and the upper end 26 of which engages in the setting spring 27 of the setting plate 28 arranged-upon the upper tang 29 0f the breech mevhanism. This setting plate is "operated in the usual manner and the spring 27 thereof is provided with the usual latch end 30 co-acting with three spaced notches 31, 32 and 33. hen the setting plate 28 is so positioned that the spring 27 thereof engages in the notch 3201 cent-rail notch, the iever is in what is known as a neutral or safe position and when in this position the lo-ivefend of the lever is positioned imi'nedia-tely'" above alug 3+1. formed upon the reareud of the trigger 13, preventing upward movement of this rear end and accordingly operation of the trigger. hen thg latch 30 of the setting me3hanism spring 2i is engaged with either of the notches 31 or 33, the lower end 25 of the lever 24: is out of alignment with the lug 3+1 and the trigger is free to operate.

Slidablymounted upon the upper surface of the trigger 13 is a selector plate 85, which plate is preferably of a thickness equal to the distance through which the rear end or lug 36 of a sear 16 or 17 must be moved to release the forward end thereof from the shoulder 20 of its associated hammer 21. The rear end of this plate is provided at one side with a notch 37 through which the lower end 26 of the lever 24 extends so that shifting of the lever 24: will cause a moveiii'c'nti of the plate 35 longitudinallyof the upper surface'of the trigger 13. The for ward end 'ofjthe'plate is held against sidewise or vertical movement by reason of the fact "that it. engages between the arms 12 of the trigger li'iount 11 and by reason of the fact that this mount has extending between the arms thereof a pin 38 overlying the upper surface'of' the select-or plate at its foiwvardendj Upon the rear end of the trigger aheaded stud 39 is'mounted "which abuts against the opposite side of the plate 35 from that bearing the notch 37 and preventsdisengagement of the plate from the notch. The selector plate 35 has at" opposite side faces thereof uo'tches 10 and a l extending into the plate a "distance greater than the extent to which the'lugs 36 'of the sears 16 and 17 overhang the trigger 13. These notches are staggered and the notch 10 is brought into alignment with the sear lug 36 of the sear 17 when the plate is moved forwardly, this forward n'iovement being accon'iplished by moving the setting plate 28 to bring the catch 30 of the spring 37 into engagement with the notch 33. The notch 41 of the plate is brought into alignment with the sear lug 3,6 of the sear 16 when the selector plate 35 is moved roarwardly, this being accomplished by moving the setting plate 28 to bring the catch 30 into engagement with the notch 31.

The position assumed by the scars 1G and 17 when the hammers 21 are cocked is such that when the trigger is forced to its lowermost position the lower faces of the lugs thereof are in a plane represented by the upper surface of the plate 35. Accordingly, if a notch 4-0 or 41 is aligned with the lug 36 the other of the lugs which overlies the plate will be operated upon initial movement of the trigger, the second lug entering the notch with which it is aligned. Since the plate 35 is of a thickness equal to the amount of distance through which the rear end of the sear 16 or 17 must be moved to release its forward end from the shoulder 20 of the associated hammer 21 and permit this hammer to operate, by moving the trigger at the point of engagement of the sear lugs 36 through a distance equal to the thickness of the plate 35, that sear having its lug overlying the plate will be operated and its associated hammer released. After such operation the upper surface of the trigger will come into engagement with the second sear lug 36 and the movement of the trigger will be checked. A second pull will result in the operation of the second scar and of its hammer. It will be obvious that by shifting the plate to move the notch 40 or 41 beneath its associated lug 36 either barrel of the gun may be initially fired and the second barrel of the gun operated upon a further operation of the trigger. Attention is directed to the fact that when one barrel of the gun has been fired the elevation of the trigger resulting from such firing places the lug of the trigger either at one side or the other of the lever 24 associated with the safety mechanism and, accordingly, it will be impossible for the safety mechanism to be shifted to effect a change of selection until the gun is again recocked and the trigger returned to its lowermost position.

It will be obvious that with the mechanism above described provided alone it would be extremely difficult to prevent double Iir ing or the fire of both barrels of the gun in immediate succession, for the reason that the rebound of the gun from the shoulder of the shooter where it has been forced dur ing the tiring of the first barrel by the explosion of the charge would tend to bring the trigger 13 against the finger of the operator to cause a further actuation of the trigger and accordingly operation of the second sear. In order to prevent this occurence I pivot upon the rear end of the trigger 13 a cam 42 which operates against one side face of the vertical plate 23 hereinbefore referred to. The cam 42 is provided upon its upper surface with an arcuately curved face 43 which, as will hereinafter more fully appear, in all positions of the mechanisms but one is operable to swing beneath a horizontally disposed lug 44 extending outwardly from the plate 23. To the cam 43 adjacent the pivot point thereof, as at 45, is secured one end of a spring 46, the opposite end of which is secured to the forward end of the plate 23, as at 47, this spring serving the combined functions of urging the cam 42 forwardly and elevating the rear end of the trigger 13. The cam 42 is provided adjacent its pivot with a tail 48 which engages against a stop pin 49 carried by the trigger plate as the trigger and cam are moved down wardly. By this engagement the upper end of the cam is thrown rearwardly so that the arcuate face 43 thereof is arranged beneath the lug 44 of the plate 23. The cam is provided at the forward end of this face with upwardly projecting ears 50 which limit its rearward movement and prevent the cam from swinging rearwardly too great a distance. A second lug 51 projects outwardly from the plate 23, this lug having its rear face spaced from the forward face of the lug 44 a distance slightly great er than the width of the cam and serving as a stop to limit forward movement of the cam during recoil of action of the gun resulting from the firing of a charge therein.

The upper curved surface 43 of the cam has formed therein a longitudinally extending slot 52, :the rear end of which communicates with a recess 53 in which is disposed a compress spring 54. In this slot is pivoted a latch member 55 having a tail 56 against which the spring 54 abuts, the engagement of the spring with the latch member tending to depress the forward end 57 thereof. lVhen the cam is in the rearmost position, as illustrated in .Figure l, the forward end 57 of the latch 55 clears the lug 51 sufficiently to allow it to come into engagement with the rear face of the lug with the result that the latch engages against this rear face and holds the cam in the rearmost position until the trigger 13 is actuated to elevate the cam. During this actuation of the trigger the latch 55 releases to permit a sutficient upward movement of the rear end of the trigger to fire the first sear. During return movement of the cam from rebound from the shoulder of the shooter, this latch wipes against the upper surface of the lug 51 and acts as a brake preventing too rapid return movement of the cam.

In the operation of the gun, assuming the hammers to be cocked, a selection is effected through the setting plate 28. In the present instance I have illustrated the mechanism in Figures 1, 2 and 4 inclusive as arranged to fire the right hand barrel initially and then the left handbarrel. Assuming the parts to be in the position shown in Figure 1, a pull imparted to the trigger will cause the right hand sear 16 to be elevated and release its hammer 21 for operation. Upon pulling of the trigger and before the charge is fired, the parts assume the position shown in solid lines in Figure 2, the surface 43 of the cam coming into positive engagement with the upper surface of the lug 44 and limiting upward movement of the trigger beyond a point where the right hand sear 16 is released. Upon the charge being fired the recoil of the charge will cause the cam 43 to be. thrown forwardly, its forward movement being limited by the lug 51. Following the recoil of the gun from the charge the rebound from the shoulder of the shooter will cause the gun to move forwardly, with the result that the cam 42 moves rearwardly, this rearward movement being to a certain extent checked by the latch 55 in the manner hereinbefore described. The cam now returns :to a position similar to that shown in solid lines in Figure 2.

As is well known to those familiar with the art, during the recoil movement of a gun, due to a firing of a charge therein,

the trigger separates from the finger so that no pressure is applied thereto. During the rebound from the shoulder, however, following such recoil the trigger during its forward movement engages against the finger and in the absence of a stop is forced rearwardly to fire the second barrel. During this rebound, as above stated, the cam is again positioned beneath the lug i4 and accordingly when the finger engages against the trigger the upward movement of the trigger will force the curved surface 43 of the cam into engagement with this lug where movement of the trigger will be positively limited by the cam and double firing accordingly prevented. This surface of the cam being curved, however, the slightest release of the pressure of the finger against the trigger 18 will permit the cam to release from the lug 44, so that it is drawn forwardly by the spring 47 and again assumes the position shown in the dotted lines in Figure 2. In this position the trigger is free to move to perform the second firing operation, the cam moving upwardly between the lugs 44 and 51, as illustrated in Figure 3, during such further m'oven'ient of the trigger." Attention 1s directed to the fact that since the position assumed by the cam upon pulling the trigger in the primary movement thereof and the position assumed afterrebouud are identical, the trigger upon its release will permit the cam to move forwardly just as well in event of failure of firing of the first barrel it will if this barrel be fired andthe cam operated through the sequence of movements above set forth. If the first barrelit'ails to fire, due tothe presence there- I in a selection is accomplished by a shiftsafe position, if so. desired.

thermore be noted that I have provided a able lever which'iikewise serves to positive ly lock the trigger against movement or in it will furtrigger having means mounted thereon serv mg both as a positive stop limiting the movement of the trigger during the initial firing operation and as a rebound operated mechanism for vreventin double firin [t will furthermore be obvious that the structure of the various elements as hereinbefore set forth is capable of some change and modification without materially departing from the spirit of my invention and I according-1y do not limit myself to such specitic structure except as hereinafter claimed.

1. In a doublebarrel gun provided with a single trigger mechanism comprising a trigger having continuing primary and secondary movements by means of which the hammers of the barrels are successively operated, a fixed stop carried by the breech mechanism, and an oscillatory recoil cam carried by the trigger and coacting with the stop to control the trigger in said movements.

Q. In a double barrel gun provided with a single trigger mechanism comprising :a trigger having continuing primary and secondary movements whereby the hammers of the barrels are successively operated, a fixed breech stop and a member carried by the trigger initially positioned to engage said stop to limit the primary movement of the trigger and subsequently positioned by the rebound following the recoil of a fired charge to again engagesaid stop to prevent arcidental secondary movement of the trig- .lhc spring a6, in addition to function ger by the engagement of the finger therewith during such rebound. I 3. In, a double barrel gun provided with a single trigger mechanism comprising a,

trigger having continuing primary and see- 'ondary movementswhereby the hammers of movement for shifting said cam'beneath said stop to engage with said stop during pri" 'mary movement of the trigger.

- 4. In a double barrel gun provided With a single trigger mechanism comprising a trigger having a primary and secondary movement where-by the hammers of the barrels are successively operated, said trigger being shifted into position for its primary movement by the cocking of said hammer, a stop carried by the breech mechanism, an oscillatory cam carried by the trigger, means engaged by the cam duringthe movement of the trigger .into position for, its primary movementfor shifting said cam' beneath said stop to engage with said stop during primary movement of the trigger, and a spring holding the trigger elevated and moving said cam to a position permitting secondary movement of the trigger upon release of the trigger after such primary movement.

5. In a double barrel gun provided with a single trigger mechanism comprising a trig ger having a primary and secondary movementwhereby the hammers of the barrels are successively operated, said trigger being shifted into position for its primary move ment by the cocking of said hammer, a stop carried by the breech mechanism, an oscillatory cam carried by the trigger, means en-- gaged by the cam during the movement of the trigger into posit-ion for its primary movement for shifting saidcam beneath said. stop to engage with said stop during primary movement of the trigger, a spring holding the trigger elevated and moving said cam 'to' a position permitting secondary movement of the trigger upon release of the trigger after such primary movement, and a stop limiting the movement of the cam an der influence of said spring.

6. In a double barrel gun provided with a single trigger mechanism comprising a trigger having a primary and secondary movement whereby the hammers of the barrels are successively operated, said trigger being shifted into position for its primary movement by the cocking of said hammer, a stop carried by the breech mechanism, an

oscillatory cam carried by the trigger, means engaged by the cam during the movement of the trigger into position for its primary movement for shifting said cam beneath said stop to engage with said stop during primary movement of the trigger, a spring holding the trigger elevated and moving said cam to a position permitting secondary movement of the trigger upon release of the trigger after such primary movement, a stop limiting the movement of the cam under influence of said spring, and alatch carried by the cam and engaging the last named stop to prevent shifting movement of the cam when the cam is shifted beneath the first named stop by said means.

7. In a double barrel gun provided with a single trigger mechanism comprising a trigger having continuing primary and secondary movements. whereby the hammers of the barrels are successively operated, a member carried by the trigger coacting with a part fixed to the breech initially operating as a positive stop to limit the primary movement of the trigger and subsequently operated by the rebound following the recoil of a fired charge to prevent the secondary movement of the trigger by the engagement of the finger therewith during such rebound, and a spring holding the trigger elevated and moving said cam to a position permitting secondary movement of the trigger upon release of the trigger after such primary movement.

8. In a double barrel gun provided with a single trigger mechanism comprising a trigger having a primary and secondary movement whereby the hammers of the barrels are successively operated, said trigger being shifted into position for its primary movement by the cocking of said hammer, a plate extending adjacent the rear end of the trigger and having a pair of spaced stops extending outwardly therefrom, a cam pivoted tothe trigger, a spring normally moving the cam into engagement with one of said stops and the trigger into elevated position, means engaging the cam during the movement of the trigger into position for its primary movement for shifting said cam beneath the other of the stops to engage therewith during primary movement of the trigger, and means carried by the cam engaging the first named stop when the cam is positioned beneath the last named stop under influence of said means to hold the cam against movement toward the first named stop.

9. In a double barrel gun provided with a single trigger mechanism comprising a trigger having a primary and secondary movement whereby the hammers or" the barrels are successively operated, said trig rger being shifted into position for its primary movement by the cocking of said hammer, a plate extending adjacent the rear end of the trigger and having a pair of spaced stops extending outwardly therefrom, a cam pivoted to the trigger, a spring normally moving the cam into engagement with one of said stops and the trigger into elevated position, means engaging the cam during the movement of the trigger into position for its primary movement for shifting said cam beneath the other of the stops to engage therewith during primary movement of the trigger, and means carried by the cam engaging the first named stop when the cam is positioned beneath the last named stop under influence of said means to hold the cam against movement toward the first named stop, said means yielding during primary movement of the trigger to permit its disengagement from the first named stop.

10. In a double barrel gun provided with a single trigger mechanism comprising a trigger having a primary and secondary movement whereby the hammers of the barrels are successivelyv operated, a fixed breech stop, a member carried by the trigger initially positioned to engage said stop to limit the primary movement of the trigger and sul sequently positioned by the rebound following the recoil of a fired charge to again engage said stop to prevent accidental second ary movement of the trigger by the engage ment of the finger therewith during such rebound, a stop member limiting movement of the member under the recoil of a fired charge, and means carried by the member and engaging said stop during movement of the member under the influence of the rebound to brake the movement of the member.

11. In a double barrel gun, a single trigger mechanism comprising a trigger hav ing continuing primary and secondary movements whereby the hammers of the barrels are successively operated, including a slidably shiftable selector plate mounted upon the upper surface of the trigger for determining which hammer is initially operated, a pivoted lever slidably engaging one side of said trigger. a lug carried by the trigger and above which the lower end of the lever is positionable when the trigger is in the lowermost position, a connection between the plate and lever whereby the plate shifted when the lever is shifted, and means disposed exteriorly of the breech for shifting said lever.

In testimony whereof I hereunto ZU fiX my signature.

ELMER E. MILLER.

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