US985156A - Trigger device for firearms. - Google Patents

Description

' R. PROMMER. TRIGGER DEVICE FOR FIREARMS. APPLICATION FILED NOV. 5, 1907.

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APPL IOATION FILED NOV. 5, 1907.

' Patented Feb. 28; 1911.-

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R. FROMMER. TRIGGER DEVICE FOR FIREARMS. APPLICATION FILED NOV. 5, 1907.

985,1 56. Patented Feb. 28, 1911.

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TRIGGER nnvrcn vnon FIREARMS.

To all whom it may concern:

Be it known that I, RUnoLF FROMMER, manager, subject of the King of Hungary, residing at Budapest,Austria-Hungary, have invented certain new and useful Improvements .in or Relating to Trigger Devices for.

Firearms, fication. v

This-invention relates to a trigger device for fire arms by means of which either a single shot can be fired by. pressing the trigger or the firing continued as long 'as the pressure on the trigger is kept up, as desired, either of the .two results being obtained by suitably operating a change part.

The invention further relates to a safety of which thefollowing is a specidevice which makes it possible to fire only.

when the breech-bolt is completely closed. 1

The trigger device which can be of different constructions is shown in the accompanying drawings in- .two constructions. First for fire arms in which the trigger is operated by pulling with the curved finger and then for fire arms in which the firing is effected by means of a pressure exercised for instance on a .knob. It goes without saying that the device arranged for operation by pulling can be easily applied for operation by pressure, and vice versa.

Figure 1 shows the trigger device with pulling movement put in for single firing.

Fig. 2 shows the same adjusted for continuous firing. Fig.3 is a view of the trigger mechanism from the under side, also show ing the setting lever. Fig. 4 shows the sear, and the-tumbler in plan and part of the framein section. Fig. 5 is a cross section on line .VV of Fig. 1. Fig. 6 shows the trig ger device for pressure movement set for continuous firing. Fig. 7 shows the same set for single firing. Fig. 8 shows the lan of the sear and tumbler, and portion 0 the:

frame in. section, this constructionbeing a j modification of that shown in Fig. 4.- Fig.

- ting lever and a partial section of the frame.

front of a projection 5 of the firing pin 6.

9 isa plan of the trigger arm and the set- Fig. 10 is a detail view .of the head of the firing pin of another construction.

, In the construction shown inn-Figs. 1-5, the sear 1 is pressed by the spring 2 against a stop 3, thenose 4 of the-sear being in The tumblerv 7 iscontrol-led by a spring actuated pin 8 in such manner that its nose 9 the Specilicationof Letters Patent. Patented Feb. 28, 1911. Application filed November 5', 1907. Serial No.1 400,815.

- is pressed in front of the projection 5. The

two noses 4 and 9 are arranged side by side (Fig. 4) in such manner that the firing pin 6 r can be held fast by the two noses simultaneously.

As will be seen from Figs. 1 and 2, the sear 1 can be secured by a safety rod 32, the latter engaging under the sear, so that the latter cannot swing'out.

In order to enable the firing pin 6 to be cocked even when the sear is at half cock,

paw 33 (Fig. 10) in such amanner that the said pawl 33'moves out ,of the way of the sear, into the half cock position during the cocking of the firing pin. The release of the sear 1. is efi'ected by the trigger 1O controlled by a spring 11 and provided with a trigger pin 13 operated by a spring 12. The said trigger pin is provided with a part 15 projecting laterally from the tri ger and guided in a slot 14 of the trigger Fig. 3).

rojection 5 can be made into a spring.

Laterally of the trigger is-arranged the set- I ting lever 16 which is held fast in two positions by means of a spring controlled look ing pin 18 arranged in its knob 17. -.The

setting lever'is provided .inside the gun casing with two projections 19 and 20 which. can be brought into engagement with the tumbler 7 or with the projection 15 of the trig er pin.

If it is desired to fire single shots by means of the trigger device, the setting lever- 16 is placed-into the position shown in Fig.

1, its projection 19. forcing the tumbler 7 out ofreach of the firing pin projection 5 and holding it fast in this disengaged posi= tion. The projection 20 .comes into engage ment with the projection 15 of the trigger pin 13, whereby the latter is slightly forced I back against the action of the spring 12.. .Owing'to this forcing back of the trigger pin, the length ofthe trigger from the axis of rotation-'21 to the operative edge 22 1s shortened to such an extent that, ,on the triggerjbeing pulled, the edge 23, of the sear =1 springs back from the edge 22 as soon as the nose 4 releases the firing pin, so that the sear l 'under the influence of the s ring'2 comes back to its position of rest a ter the firing pin 6 has been released. 1 In that way the result is obtained that the sear 1' .is at- .once ready again to seize the firingpin and not to release it beforefagain being'pulled'.

L surface 25 when the breech-bolt is coming stops.

If the trigger 10. is again released after firing ashot, the trigger pin 13 which is moved against the action of the spring 12, can again return to its original position, so 5 that a new shot can be fired.

If it is desired to fire continuously with the said trigger device, the setting lever 16 is .brought into the position shown in Fig. 2, its projection 19 becomingdisengaged from the tumbler 7, sr that the latter is brought by its spring actuated pin. 8 into engagement with 'and placed in'front of, the firing pin projection 5. The firing pin 6 is, therefore, held simultaneously both by the nose 4 of the scar and the nose 9 of the tumbler, as long as the trigger is not pulled.' The tumbler 7 has a cam surface 24 which is depressed by a corresponding cam-surface 25 of the breech-bolt 26, whereby the tumbler 7 is released as soon as the breech-bolt is brought into the closed position. Accordingly when the bolt is completely closed the firing pin 6 is held only by the sear 1.

Owing to the shifting of the position of the setting lever 16 its projection 20 also became disengaged fromthe projection 15 of the trigger pin 13 which is no longer limited by the projection 15 but expands a little, 1 comes out from the trigger and-is limited only by the slot 14 provided in the trigger. I If the trigger is pulled, a shot is fired, as, owing to the completely closed breech-bolt, the tumbler '7 is in thedisengaged position and by pulling the trigger, the sear is released. The edge23 of the sear 1 can, however, no longer spring back from the edge 22-0f the triggerpin 13 as the length of the trigger'has been slightly increased from the axis of rotation 21- to the edge 22, owing to. the release of the projection 15. The sear 1 is, therefore, .held out of engagement with the projection. 5 of thefiring pin as long as the pressure onthe trigger continues. After firing a shot,'the breech-bolt," and with it also the cam surface 25, move. backward, .the tumbler is therefore again brought by its spring actuated pin-8 into the engaged position, it holds the firing pin fast again and is again automatically released by the cam \pletel'y closed. This is repeated as'long as the pressure on the trigger continues. On the trigger-being released the sear comes into the path of the firing pin 6, and the fir-;.

The trigger device shown in Figs. 6-9 for pushing the trigger is substantiallythe ,same as hereinbefore-described, onlysthe trigger is constituted by an adjustabletrigger arm. The corresponding parts are marked in the drawings with the same ref erence numerals as'in the first construction. The trigger arm 27- is provided with a tongue 29' (Fig. 9 rotatable about a pin 28 and provided wit ,axcam' surface 30. The

is brought by the projection 19 of the setting lever out of reach of the firing pin projection 5. At the same time a projection 34 of the setting lever is brought into the path of the cam surface 30 of the tongue 29.. When the trigger arm 27 is'pushed forward for the purpose of firing a shot, the sear is turned by the projection 33, so that the nose 4 releases-the firing pin, and a shot-is fired. When arm 27 is now pushed forward, the tongue 29.is slightly depressed by the projection 34 which slides along the cam surface 30, so that the edge 23 of the sear springs back from the edge 22 of the projection 33 the moment the nose 4 has re-.

leased the firing pin.' The sear is then brought again by its spring 2 inthe well known manner to its position of rest in which it is ready to catch the firing pin in the well known manner. ger arm 27 is pulled back, the edge-22 moves ack in well known manner, the projection 33 being turned downward about the pin 28. The sear thus holds the firing pin fast, as long as it is not pulled back again.

If it is desired to set the gun for continuous firing, the setting lever 16 is turned into the position shown in Fig. 6. ;In that position of the setting lever, the projections 19 and 34 become disengaged respectively from the tumbler 7 and the cam surface 30. In that way the tumbler 7 is brought by its spring 8 within reach of the firing When the trig- I I pin projection 5,, the said tumbler, like in the first construction being automatically brought into action by -the' cam surfaces 25 and 24. At the advance of the-trigger arm 27, the tongue 29 is, however, no longer pressed down sincethe projection 34 is not in engagement with the cam face30. The

edge 22 will not,'therefore, move out of the way of the edge 23, so that the sear 1 remains disengaged, and the firing, as already stated, will be automatically continued as long as the pressure on the trigger arm continues. v I

In the trigger device according to this invention, there is further provided asafety device. which insures that the'firing shall be possible only whenthe breech-bolt is completely closed. To that end, the bottom edge'of the breech-bolt is provided with two inwardlongitudinalribs 35 or the like (Figs. 1, 2, 5, 6 and 7) cooperating with two small laterally projecting ledges 36 or the like of the sear nose-4 and of the tumbler nose 9. When the sear and the tumbler are in engagement with the firing pm projection 5,

, the ledges 36 are situated above theribs and prevent the noses" 4 and 9 from being pulled down. The ribs 35 are interrupted at the point where the noses 4 and 9 are situated when the breech-bolt is closed, so that the noses 4 and 9 can come out from the breech-bolt at' this point. In that way neither the sear'nor the tumbler can release the firing pin unlessthe breech-bolt is completelfv closed. This safety' device can of course be applied to any kind of fire arms.

In order that the sear and tumbler; after a shot ha been fired, can r'egaintheir original position to intercept the firing-pin'on the forward movement of the latter with the bolt,.'the ribs 35 are. also recessed at their extreme forward end, so that when the breech-bolt returns to its forward open position, the said recesses in the rib 35fwill lie over the noses 4 and 9, permitting the'same to be returned by their springs to their position in which they again engage with the projection 5 of the firing pin.- j i In case'the' trigger device'has only one part releasing the firing pin, it can be provided on both sides with ledges 36 or the like, or only on one side, the longitudinal ribs 35 or the like being provided on the breech-bolt only at that point.

. I claim v 1. Trigger device, comprising in combination with the trigger, a breech-bolt, a firing pin, a sear and a tumbler, the said sear and tumbler having means to engage with the said firing pin, the sear being adapted to be disengaged from the firing pin by the trigger, and a cam-face on the breech-bolt adapted to cooperate with a controlled trigger-pin, a firing pin, a sear hav ng means to engage with the said firing pin and lock the same in cocked position, a

each pulling-of the trigger.

engage upon the closing of the breech-bolt tumbler having means to engage with the projection on said trigger-pin, and a setting lever adapted to engage with said projection to retract the said trigger-pin and shorten the same, the trigger pin engaging the said sear withan edge soas torelease-the said. sear and become disengaged therefromupon 4. Trigger device comprising in combinatio-n'witlr the trigger and 'a movable, springcontrolled trigger pin, a' breech-bolt, a firing pm, a sear, a tumbler, the said sear and tumbler havm means to en a e wlth theisald g in means on said trigger pin to engage with the said sear and withdraw it from its locking position, means on said breech-bolt to with said tumbler and withdraw it from its locking position, and a setting lever hav-- ing a projection adapted to engage with said tumbler and permanently withdraw it from its locking position.

v 5. Trigger device comprising in combination with the trigger and a movable, springcontrolled trigger pin, a breech bolt, a fir ing pin, a sear, a tumbler, the said sear and said firing pin, l0cking it in cocked position, means on said trlgger-pin to withdraw the said sear from its locking position, means on said breech-bolt, to withdraw, when closed, the said tumbler from its locking position, and means on said breech-bolt and-the said sear and tumbler respectlvely to prevent the withdrawal of either the said sear or tumbler from their locking positions except upon the breech -bolt being completely closed. j V

6. A trigger-device 'comprising in combination with the trigger and a movable trigger-pin, a firing pin having a projection and a scar having means to engage with said projection and lock thereby said firing pin in its cocked position, the said projection comprising a spring pawl adapted to move out of the way of the sear.

In testimony whereof I afiix my signature 100 in presence of two witnesses.

RUDOLF FROMMER.

Witnesses:- LILIAN FUIOP,

LESLIE S sAsz.

firing pin, locking it in cocked position,

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