US937864A - Single-trigger mechanism. - Google Patents

Description

P. H. ROBINSON.

SINGLE TRIGGER MECHANISM.

APPLICATION FILED FEB. 8, 1909.

Patented Oct. 26, 1909.

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P. H. ROBINSON.

SINGLE TRIGGER MECHANISM.

APPLICATION FILED FEB. e, 1909.

937,864. Patefited 0013.26, 1909.

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P. H. ROBINSON.

SINGLE TRIGGER MECHANISM.

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PEARL H. ROBINSON, OF SHELTON, CONNECTICUT.

SINGLE-TRIGGER MECHANISM.

Specification of Letters Patent.

Patented Oct. 26, 1909.

Application filed February 8, 1909. Serial No. 476,788.

T 0 all whom it may concern:

Be it known that I, PEARL H. ROBINSON, a citizen of the United States, residing at Shelton, county of Fairfield, State of Connecticut, have invented a new and useful Single-Trigger Mechanism, of which the following is a specification.

This invention relates to the trigger mechanism of fire arms and has particular reference to such mechanism for double barreled shot guns, especially such as employ a single trigger for actuating both hammers.

One of the objects of my invention is to prevent an involuntary pull, due to the recoil from the discharge of one barrel, from having the effect of automatically discharging the other barrel.

Other objects of the invention are to provide an improved escapement mechanism which performs the function above mentioned; to provide an improved firing lug block which is pivoted instead of being an ranged as a slide; to provide means whereby the user of the gun can determine by sense of touch which barrel has beendischarged or is next to be discharged; and to provide various improved details of construction tending to improve and simplify the construction and operation of the trigger mechanism and to reduce the cost thereof.

To these ends the invention consists in the construction and combination of parts substantially as hereinafter described and claimed. 7

Of the accompanying drawings :Figure 1 is a sectional side elevation of a portion of agun embodying my improvement. Fig. 2 is a detail plan of the under plate and the parts immediately carried thereby. Figs. 3 and 4: are detail views similar to a portion of Fig. 2 but on a larger scale, illustrating the different positions to which the firing lugs may be shifted for controlling the sear which is'to be first actuated. Fig. 5 is a 7 detail plan view from the under side, of the finger piece for shifting the firing lug" block. Fig. 6 represents a detail section on line 6-6 of Fig. 7, looking in the direction of the arrow, but showing also in section a portion of the under plate which latter does not aptive positions occupied by them when in normal position ready for discharging the first barrel, one of the arms of the hooked slide being shown as broken. Fig. 8 is a detail side elevation of parts of the mech anism shown in Fig. 7 but with said parts in the relative positions which they occupy when the trigger is first shifted for firing but before a hammer has been released. Fig. 9 is a view similar to Fig. 8 but showing the parts in their positions at the time of discharge of the first barrel. Fig. 10 is a similar view showing the parts in their positions due to the involuntary release following the discharge of the first barrel. Fig. 11 is a similar view showing the parts in their positions after voluntary release and when the second barrel is ready to be fired.

Similar reference characters indicate the same or similar parts in all of the views.

The stock of the gun is indicated at 15 and the barrel portion at 16, the latter being pivoted at 17 to a block 18 carried by the stock. The hammers 19 occupy recesses in the block 18 and are actuated by springs 20 through the medium of the customary plunger and strut or link.

The hook slide 21 is connected by a bellcrank 22 with a hook 23 on the under side of the barrel to provide means for cooking the hammers when the barrel is swung on its pivot for loading. The sears 24 and 25 are actuated by springs 26 to cause their forward ends to engage the hammers when the latter are cooked. As is usual with mechanism similar to'what has been so far described, raising the rear end of either of the sears, releases the corresponding hammer.

Any suitable means may be employed for locking the barrel when the gun is closed. A well known form of such means includes a rock shaft 31 and a finger lever 33. To

avoid confusion, I have not attempted toillustrate further details of such well known barrel lock. All of the mechanism so far described is of a well known form.

The under plate 34 of the gun lock mechanism has a housing 35 which receives the threaded lower end of a bolt 37 the head of which is recessed in the to plate 36. The trigger 38 is pivoted at 39 in the housing. Also mounted on the pivot 39 is a block 40 which I shall refer to asthe trigger body because its oscillations are effected by the trigger although the latter has a slight oscillating movement on the pivot 39 relatively to said body as will readily be seen by comparing Figs. 7 and 8. One end of the trigger body which I shall refer to as the front end or tip has its upper surface concave as at 41, the point of junction of said concave surface with the front or upright wall forming a tooth 42. The trigger itself extends through an opening 43 in the trigger body and is provided at its front end or tip with a finger 4d the lower surface of which is slightly convex. The normal slight space existing below the finger lt as shown in Fig. 7 permit-s the trigger to have a slight independent movement on its pivot before said finger contacts with the surface 41 to oscillate the trigger body, the object of which construction will be hereinafter explained.

Mounted on the top of the trigger body is a member which I shall refer to as the cocking slide 45. Said slide is slotted or bifurcated to form two arms which pass forward along the sides of the trigger tip, the ends of said arms being formed with downwardly turned lugs 46 which are adapted to be engaged by upwardly turned lugs 47 at the ends of arms 48 (see Fig. 2) which are integral with, or rigidly connected to, the hooked slide 21 so that when the barrel is swung on its piovt for loading and the slide 21 is pulled forward, the said lugs 47 engage the lugs 16 and pull the cocking slide forward resulting in setting said cocking slide in the position shown in Figs. 7 and 8. Said figures however show the slide 21 and its arms 48 and lugs 27 as retracted, but this is because the parts of the gun have been restored with the barrel locked for firing which actof restoring puts the said slide 21 in the position shown in said Figs. 7 and 8.

I will now describe how the forward movement of the cooking slide to put it in the position of Figs. 7 and 8, sets the firing lug :The trigger body 40 is formed with a vertical slot 49 through which a pin 50 extends downward from the cooking slide, said pin being secured to the slide and having its lower end fitted in an opening in the top of a sliding tube 51 mounted in a longitudinal cylindrical opening or bore 52 in the trigger body. This structure insures that the sliding tube 51 must always reciprocate with the cooking slide 45. Mounted vertically in and transversely of said tube 51 is a rock shaft or pin which extends through slots in the trigger body above and below. Secured to or integral with the upper end of said pin 53 is the firing block having two lugs 54 and 55 preferably formed as best indicated in Figs. 3 and 4 which lugs are respectively adapted to actuate the sears 24 and 25 in a manner hereinafter described. The portions of the pin which pass through the tube 51 are circular and fit corresponding openings in said tube. But the intermediate portion of said pin is square as at 56, and against opposite sides of this squared portion spring plungers bear in order to hold said rock shaft or pin and the firing lug in either the full line or the dotted line positions of Figs. 3 and 4:. Said spring plungers are indicated at 57, the same having faces or heads which bear against opposite fiat faces of the portion 56, and stems which are surrounded by springs 58 and 59. The other end of the spring 59 bears against a plunger 60 which in turn bears against a portion of the trigger to normally hold the trigger and trigger body in the relative positions shown in Fig. 7. Secured to the lower end of the rock shaft or pin 53 is a finger piece having two arms or buttons (51 and 62. A small slide 63 through which the pin 53 passes, prevents access of foreign matter through the slot in the trigger body.

It will now be readily understood that the person using the gun can oscillate the rock shaft or pin 53 by means of either of the buttons (31, 62, so as to turn the pin and set the firing block in either of the positions shown by full and dotted lines in Figs. 3

v and 4. The arrangement is such that when one button projects to the right of the trigger, the firing lug is in position so that when the trigger body is oscillated, the lug member 55 will be under the right hand sear 25 and fire the right hand barrel first. Of course a second operation of the trigger without shifting the firing lugs will result in actuating the left hand sear and firing the left barrel all as will more fully appear hereinafter. By actuating either button so that one will project to the left of the trigger, the firing lugs are shifted to such position that the first movement of the trigger will discharge the left hand barrel. Therefore the user can always tell either by the sense of sight or touch which of the two barrels is to be fired.

To hold both the trigger and the trigger body normally in the position shown in Fig. 7, I employ a spring pressed plunger 64 wvhich bears on the cooking slide back of the pivot 39 of the trigger and trigger body. Said plunger is actuated by a spring 65 mounted in a recess 66 in the lower end of the connecting bolt 37, the plungerG l reciprocating in the lower portion of said recess and projecting therefrom. Said plunger has an elongated bearing portion 67 in the recess so that said plunger will not be deflected as the cocking slide reciprocates under it.

The spring 59 possesses two functions. As has been described it causes the plunger 00 to bear against a portion of the trigger so as to normally hold it in the position shown in Fig. 7 relatively to the trigger body. Since the other end of said spring bears against one of the plungers which, in turn, bears against a fiat portion of the rock shaft or pin 53, said spring tends to force rearwardly the said rock shaft or pin and the firing lug or lugs, the sliding tube 51, the pin 50 and the cocking slide 45. But when the parts are in the normal position ready for discharging the first barrel, as shown in Fig. 7 this rearward movement of the sliding tulge and the firing lug is prevented by the front wall of the tooth 42 of the trigger body being in the path of rearward movement of the lugs 46 of the cocking slide. Before said cocking slide and the firing lugs can be shifted'rearwardly, this engagement of the lugs 46 with the tooth 42 must be displaced. Such a displacement however must not occur until after the first barrel has been discharged. I will now describe the successive steps of this operation.

Assuming that the parts are in the position shown in Fig. 7, and that both barrels of the gun have been loaded and returned to closed and locked position, the first movement of the trigger 38 closes the finger 44 down upon the concave surface 41 of the trigger body as shown in Fig. 8. This first movement of the trigger may be called a free one as it does not oscillate the trigger body. It does however bring the front wall of a wide portion of the trigger above the finger 44 down behind the rear wall of teeth 460 which project toward each other from the lugs 46 as shown in Figs. 2 and 6. At this time, the tooth portion 42 of the trigger body is behind the tooth portions 460 of the cocking slide and consequently the cocking slide and the firing lugs are prevented from being shifted rearward by the spring 59. Further movement of the finger against the trigger causes the trigger body to oscillate with the trigger on the pivot 39, this movement continuing until the tooth 42 of said trigger body passes below the teeth 460, this latter position having been almost reached in Fig. 8, and completely reached in Fig. 9. This elevates the rear end of the trigger body and causes one of the scars to be actuated by its proper firing lug, so that the first barrel is discharged. When the trigger body has been shifted sufiiciently to release the cocking slide teeth 460, the spring 59 will be exerting its force to carry said cocking slide rearwardly. But as has been described, it can not yet pass rearwardly because of the wide portion of the trigger above the finger 44 being behind the teeth 460 as shown in Fig. 9. The recoil due to the discharge of the first barrel, involuntarily causes the release of the trigger to the position shown in Fig. 10, and the resulting rebound causes the trigger to shift back to the position shown in Fig. 9 but since the users finger on the trigger will still involuntarily keep the end of the finger 44 in contact with the surface 41 of the trigger body, the cooking slide cannot move rearwardly because there is insufiicient space to enable the teeth 460 to pass between the tooth 42 and the wide portion of the trigger. But upon voluntary release of the trigger, the trigger body will be shifted entirely back to normal position partly by the spring pressure of the lifted sear and partly by the pressure of the spring pressed plunger 64. The final movement due to the voluntary release causes the trigger finger 44 to lift again to the position shown in Fig. 7 and leaves a space then through which the teeth 460 can pass so that the spring 59 shifts the sliding tube rearwardly so as to carry the firing lugs and the cocking slide to the position shown in Fig. 11, this being the position in which the firing lugs occupy the positions relatively to the sears shown in Fig. 4 so that a second actuation of the trigger will discharge the left hand barrel.

The rear end of the trigger body is provided with an upturned ear or lug 71 which is adapted to cooperate with the tip of a lever 72 of an ordinary safety equipment the details of which need not be described as the same forms no part of this invention. It is sufiicientto state that when the lever 72 is shifted to a position so that its tip is above the ear or lug 71, the gun cannot be fired because the trigger body cannot then be oscillated by the trigger.

Having now described my invention, what I claim is 1. A double-b-arreled gun having upper and lower plates and a connecting bolt, said bolt having a recess, a cooking slide, and a spring actuated plunger mounted in the recesg, of the bolt and bearing on said cocking sli e.

2. A double-barreled gun comprising in its construction a trigger and trigger body pivotally mounted concentrically, said trigger and body having co-acting escapement teeth, and a cocking slide having portions to engage said teeth.

3. A double-barreled gun comprising in its construction a housing, a pivot supported by said housing, a trigger and trigger body mounted on said pivot and having co-acting escapement teeth, and a cocking slide having portions to engage said teeth.

4. A double-barreled gun comprising in its construction a trigger and trigger body pivotally mounted concentrically, said body having a tooth at its front end and concaved behind said tooth, the triggerhaving a finger formed with a convex surface, and a cooking slide having portions adapted to alternately engage the tooth of the trigger body and the finger of the trigger.

5. A double-barreled gun comprising in &

its construction a trigger and trigger body pivotally mounted concentrically, said body having a tooth at its front end and concaved behind said tooth, the trigger having a finger formed with a convex surface, and a cocking slide having portions adapted to alternately engage the tooth of the trigger body and the finger of the trigger, said trigger and trigger body being relatively mounted to permit a space to be provided between said concave and convex surfaces.

6. A double-barreled gun comprising in its construction a trigger and trigger body pivotally mounted concentrically, said trigger and body having co-acting escapement teeth, and a cocking slide having arms extending along the sides of the trigger tip and having teeth to co-act with portions of the trigger and trigger body to constitute an escapement.

7. A double-barreled gun comprising in its construction a trigger and trigger body pivotally mounted concentrically, a hooked slide having arms provided with upwardly turned lugs, and a cocking slide having downwardly turned lugs to be engaged by said upwardly turned lugs of the hooked slide, said cocking slide having also teeth to co-act with portions of the trigger and trigger body to constitute an escapement.

8. In a double-barreled gun, a trigger body having a vertical slot and a longitudinal bore, a cocking slide on said body, a slidingly mounted member in said bore, a pin passing through the slot of the trigger body and connecting said cocking slide and sliding member, and a firing block operatively connected with said sliding member.

9. In a double-barreled gun, a trigger body having a vertical slot and a longitudinal bore, a cocking slide on said body, a tube slidingly mounted in said bore, a pin passing through the slot of the trigger body and connecting said cocking slide and tube, and a firing block operatively connected with said tube.

10. In a double-barreled gun, a trigger boc y having a longitudinal bore, a yield ingly mounted slide in said bore, a firing block having lugs pivotally mounted in said slide, and a cocking slide operatively connected with the first mentioned slide.

11. In a double-barreled gun, a trigger body having a longitudinal bore, a tube mounted in said bore, a rock shaft mounted transversely of said tube and having firing lugs at one end, and means for holding said rock shaft in either one of two positions.

12. In a double-barreled gun, a trigger body having a longitudinal bore, a tube mounted in said bore, a rock shaft mounted transversely of said tube and having firing lugs at one end, and means for holding said rock shaft in either one of two positions,

said means comprising plungers having fiat faces and springs for pressing said plungers against the rock shaft, the latter having fiat portions to co-act with the fiat faces of the plungers.

13. In a double-barreled gun, a trigger body having a longitudinal bore, a tube mounted in said bore, a rock shaft mounted transversely of said tube and having a block at one end said block being formed with two lugs projecting in opposite directions from the axis of said rock shaft, and means for holding said rock shaft in either one of two positions.

14. In a double-barreled gun, a trigger body having a longitudinal bore, a tube mounted in said bore, a trigger pivoted relatively to said trigger body, a plunger projecting from one end of said tube and bearing against the trigger, a rock shaft mounted transversely of said tube and having firing lugs at one end, and means for holding said rock shaft in either one of two positions, said means including a spring for projecting said plunger against the trigger.

15. In a double-barreled gun, a trigger and trigger body pivotally mounted concentrica'lly, a spring actuated plunger mounted in said body and bearing against the trigger, said trigger and trigger body having co-acting escapement portions, and a cocking slide controlled by said escapement portions.

16. In a double-barreled gun, a trigger body having a rock shaft mounted therein, said rock shaft having a block formed with firing lugs at one end, and a finger piece at the other end of said rock shaft, said finger piece having two arms.

17. In a double-barreled gun, a trigger body having a rock shaft mounted therein, said rock shaft having a block formed with firing lugs at one end, and a finger piece at the other end of said rock shaft, said finger piece having two arms substantially at a right angle to each other and in a direction to enable one arm to project to the right, or the other arm to project to the left.

18. In a double-barreled gun, a trigger body having a rock shaft mounted therein, said rock shaft having a block at one end and a finger piece at the other end, said block being formed with firing lugs extending in opposite directions from the axis of the rock shaft, said finger piece having two arms at substantially a right angle to each other.

19. In a double-barreled gun, the combination with upper and lower plates, of a housing carried by the lower plate, a bolt connecting the upper plate and housing, a trigger and trigger body pivotally mounted in said housing forward of the said connecting bolt, a spring mounted in said connecting bolt, and means whereby the pressure of said spring is transmitted to the trigger body.

20. In a double-barreled gun, the combination with upper and lower plates, of a housing carried by the lower plate, a bolt connecting the upper plate and housing a trigger and trigger body concentrically pivoted "in said housing forward of the said connecting bolt, a spring pressed plunger mounted in said connecting bolt for holding the trigger body in normal position, and independent spring actuated means for holding the trigger in normal position relatively to said trigger body.

21. In a double-barreled gun, the combi-

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