US2558872A

US2558872A - Set trigger mechanism

Info

Publication number: US2558872A
Application number: US61758A
Authority: US
Inventors: Elmer E Miller
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-11-24
Filing date: 1948-11-24
Publication date: 1951-07-03
Anticipated expiration: 1968-07-03

Description

July 3, 1951 E. E. MILLER SET TRIGGER MECHANISM 3 Sheets-Sheet 1 Filed Nov. 24, 1948 INVENTOR. I gR E.,MILLER ATTOR July 3, 1951 E. E. MILLER SET TRIGGER MECHANISM 3 Sheets-Sheet 2 Filed Nov. 24, 1948 INVENTOR.

- 7 M 7 s m 2 n H 9 5 I a 2 2 1 am, /3 4 6 w I s 2 w L 2 1 7 I s 565 1 E ATTORNEYS July 3, 1951 E. E. MILLER SET TRIGGER MECHANISM 3 Sheets-Sheet 55 Filed Nov. 24, 1948 IN VEN TOR. ,EMILLER ELMER VMy/M ATTORNEYS Patented July 3, 1951' UNITED STATES 'ENT OFFICE Claims.

This invention relates to set trigger mechanisms and particularly concerns a set trigger mechanism having a single trigger for firing the gun, which trigger may be shifted between a heavy-pull position and a light-pull position.

Set trigger mechanisms heretofore developed either included two triggers, one heavy-pull trigger and one light-pull trigger, or a single trigger with an auxiliary shifting lever for switching between a heavy-pull and a light-pull for the single trigger. In both types, it is necessary for a person using the gun to concern himself with two operating devices. This presented some difficulty in determining whether or not the gun was set for a light-pull and, also, resulted in a dangerous situation where the set trigger mechanism might be set for light-pull without knowledge of the user whereby the gun could be accidentally fired.

A major object of this invention is to provide a set trigger mechanism in which a single trigger is itself settable in either heavy-pull or lightpull positions without operation of an auxiliary setting device. "An important object of the invention is to provide a set trigger mechanism having a single trigger set in heavy-pull position by normal cocking of the gun and itself shiftable to a light-pull position. A further object of the invention is to provide such a set trigger mechanism in which the single trigger may itself be shifted back and forth between its heavy-pull position and its light-pull position.

In accordance with these objects, one feature of the invention resides in the arrangement of a hammer shiftable by the single trigger between a heavy-pull position'where it may directly actuate the firing device and a light-pull position where it is spring-pressed toward the firing device. In both of these positions, the hammer is operated by the single trigger; in the latter position the hammer is held. by a latch which may be released by a light-pull on the trigger so the spring will move the hammer to strike the operating device and fire the gun.

Other objects and'advantages of this invention will become apparent from the following specification taken in connection with the accom panying drawings, wherein V Figure 1 is a partial side elevation of a gun showing one form of a set trigger mechanism embodying the invention, with some parts broken away and others shown in section for purposes of clearness, the set trigger mechanism being shown in heavy-pull position;

Fig. 2 is a partial sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is a partial sectional view taken on the line 33 of Fig. 1;

Fig. 4 shows side and end elevations of the firing member forming a part of the set trigger mechanism;

Fig. 5 is a view similar to Fig. 1 but with the set trigger mechanism shown after the gun is fired by pressure applied to the trigger in heavypull position;

Fig. 6 is a view similar to Fig. 1 but showing the set trigger mechanism cocked in its lightpull position;

Fig. 7 is a partial side elevation of a gun showing a modified form of set trigger mechanism embodying the invention with some parts broken away and others in section for purposes of clearness, the trigger mechanism being shown in its cocked heavy-pull position;

Fig. 8 is a view similar to Fig. 7 but showing the trigger mechanism with pressure applied to the trigger; and

Fig. 9 is a view similar to Fig. 7 but showing the trigger mechanism in its cocked light-pull position.

Generally, the invention includes a firing member which may be a sear-releasing member movable to permit the sear to release the bolt of a rifle. Usually, the firing member or sear releasing member is pivoted on the frame of the gun and is arranged either to force the sear out of engagement with the bolt upon movement of the member or to latch the sear in engagement with the bolt and release the sear upon movement of the member. In either case, the gun is fired by movement of the sear releasing member.

Preferably, the sear releasing member has an abutment by which it is moved. A hammer is arranged to engage the abutment and move the member to fire the gun. A trigger on the hammer may move the hammer so it moves the member and, also, may shift the hammer between a heavy-pull position in engagement with the abutment on the firing member and a light-pull position out of engagement with the abutment on the firing member. A spring acting on the hammer forces it toward the abutment on the firing member and a latch is engaged to hold the hammer in light-pull position against the force of the spring. The trigger, which is arranged to release the latch may be pivoted on the hammer so it will engage an abutment on the hammer when in heavy-pull position to directly force the hammer againstthe abutment on the firing 3 member to fire the gun. When latched in lightpull position a light pressure on the trigger releases the latch so the gun is fired by the hammer striking the abutment on the firing member.

In preferred forms of the invention, the firing member has an extending arm and the hammer is pivotally connected to the firing member so it is positioned between the extending arm and the abutment on the firing member. A spring is interposed between the extending arm and the hammer forcing the hammer toward the abutment on the firing member but not exerting any pressure on that abutment. The trigger may have a latch arm for engaging a latch on the extending arm to hold the hammer in light-pull position with the spring compressed and the trigger disengaged from the abutment on the hammer. Light pressure on the trigger turns it about its pivot and releases the latch arm from the latch so the spring causes the hammer to strike the abutment on the firing member and thereby fire the gun.

Referring now to, the form of the invention shown in Figs. 1 to 6, inclusive, the set trigger mechanism is illustrated in a bolt action rifle having a firing pin connected to a bolt I2 which is pressed by a spring I3 toward a cartridge in the firing chamber of the gun. As shown in Fig. 1, a lug I4 on the bolt I2 is engaged by a projection I5 on a soar I6 pivoted, at I1, to the gun frame with the projection I5 forced into engagement with the lug I4 by a spring I8 acting on the sear. In this particular rifle, the sear is released from the bolt by movement of a firing or sear releasing member in the form of a sear lever 2| positioned in a slot 22 in the sear I5 and pivotally mounted by a pin 23 extending across the slot 22. The sear releasing member 2| has a cam surface 24 for engaging a plate 25 forming a part of the gun frame so movement of the sear releasing member 2| in a counter-clockwise direction (as seen in Fig. 1) about its pivot 23 forces the sear in a clockwise direction about its pivot I1 to remove the projection I5 from engagement with the lug I4 so the bolt is released to the action of the firing spring I3.

The firing member 2| has an abutment 26 by which it may be moved in a counter-clockwise direotion to fire the gun. To effect this movement, a hammer 21 has a bifurcated projection 28 extending upwardly on the opposite sides of the firing member 2| and pivotally connected to the pin 23 which supports the firing member 2|. A shoulder 29 on the hammer 21 between the sides of the bifurcated projection is arranged to engage the abutment 26 and effect counter-clockwise movement of the firing member. A trigger 3| is pivotally mounted by a pin 32 in a recess 33 formed by depending

sides

34 and 35 of the hammer 21. The trigger 3| has a shoulder 36 positioned between the

sides

34 and 35 for engaging a pin 31 forming an abutment on the hammer 21. With the parts arranged as shown in Fig. 1, pressure applied to the trigger 3| is transmitted through abutment pin 31 to the hammer 21 so the shoulder 29 resses abutment 26 to move the firing member 2| in a counter-clockwise direction and fire the gun. This position is the normal or heavy-pull position of the trigger and the hammer. sary to fire the gun depends upon the friction between the projection |5 on the sear and the lug I4 on the bolt.

On the firing member 2| there is arranged an extending arm 4| having a bifurcated lower end The pressure on the trigger 3| necesformed by

sides

42 and 43 in which a latch pin 44 is mounted. The arm 4| extend away from the abutment 26 on the firing member 2| and pivotally mounted hammer 21 is arranged between the abutment 23 and the arm 4|. The hammer 21 is normally forced so its shoulder 29 engages the abutment 26 under the pressure of a spring, such as compression spring 43, having one end arranged in a recess 49 in the extending arm 4| of the firing member and its other end arranged in a recess 59 formed in the hammer 21. When the gun is cooked, movement of the projection I5 on the sear upward into engagement with lug I4 causes clockwise movement of the firing member 2| which is arrested by engagement of its lower end 5| with an end 52 of a slot 53 formed in the trigger guard 54. The spring 48 acting between extended arm 4| and the hammer 21 forces the hammer toward the abutment 26 so the hammer and the trigger will be automatically placed in their heavy-pull positions, as shown in Fig. 1. Heavy pressure on the trigger 3| will be transmitted to the firing member so the trigger, the hammer 21 and the firing member 2| will move in a counter-clockwise direction (as seen in Fig. 1) about the pivot pin 23 to the position shown in Fig. 5, where the sear is released from the bolt and the gun will be fired.

After the gun is cooked, and the set trigger mechanism has its parts arranged in heavy-pull position (as shown in Fig. 1) the trigger may be shifted to light-pull position by pushing the trigger 3| forwardly of the gun. This forward pressure on trigger 3| moves the hammer 21 in a clockwise direction against the force of compression spring 43 so the hammer shoulder 29 is separated from the abutment 25 and the parts assume their light-pull position, as shown in Fig. 6. To hold the parts in light-pull position, the trigger 3| has a forwardly projecting latch arm 55 provided near its outer end with a shoulder 53 for engaging the latch pin 44 and holding the hammer 21 in its light-pull position against the force of the spring 48 so the hammer shoulder 29 is spaced from the abutment 26 on the firing member 2|. During this forwardmovement of the trigger 3|, a flat cam surface 51, extending outwardly from the shoulder 5% rides under the latch pin 44, preventing pivotal movement of the tri ger 3| about pin 32 so the forward pressure is transmitted to the hammer 21 until shoulder 56 passes under the latch pin 44, whereupon the trigger 3| moves in a clockwise direction about its pivot pin 32 so the shoulder 56 of the latch arm 55 is locked by the latch pin 44 and the shoulder 36 on the trigger is spaced from the abutment pin 31 on the hammer 21.

When arranged in this light-pull position, the application of light pressure on the trigger 3| turns it in a counter-clockwise direction about its pivot 32 until the shoulder 56 is disengaged from the latch pin 44 and the latch is released. Then, compression spring 48 forces the hammer 21 in a counter-clockwise direction about pivot pin 23 until its shoulder 29 strikes the abutment 26 with a blow which forces the firing member 2| to turn in a counter-clockwise direction about the pin 23 and move the sear to fire the 32, but preventing the spring 48 from moving the trigger and the hammer 21 rearwardly to strike abutment 26. Then, by slowly permitting the trigger to move rearwardly until the shoulder 29 engages the abutment 26, the parts will be returned to their heavy-pull position, as shown in Fig. 1.

With the construction illustrated in Figs. 1 to 6, and heretofore described, the set trigger mechanism, upon cooking of the gun, is set in its heavy-pull position. Forward movement of the trigger moves the hammer out of engagement with the firing member against the action of the spring 48 until the latch arm 55 on the trigger is secured by latch pin 44 on the extending arm of the firing member. Then, the parts are arranged in light-pull position where a light pressure on the trigger releases the latch and the spring causes the hammer to strike the firing member to fire the gun.

A modified trigger mechanism embodying the invention is illustrated in Figs. 7 to 9, inclusive. In this mechanism, a sear 6| has its locking projection 62 normally forced toward a lug 63 on rifie bolt 6 by a spring 65. The scar 6 is ivoted on a pin 66. The contacting surfaces of projection 92 and lock 93 are sloped in a manner such that the firing spring acting on the bolt tends to press the sear out of engagement with lug 69. This pressure, exerted on projection 62, exceeds the force of sear spring 65 so, to retain the bolt in cocked position, it is necessary to hold the sear in position with its projection 62 engaged by lug 63. For this purpose a firing member or sear releasing member 6'! is pivoted by a pin 6-8 to the frame of the gun and has an extending arm 69 provided with a notch 1! for engaging a protuberance 72 on the sear to retain the sear .in its position as shown in Fig. 7, where its projection 62 is engaged by lug 63. To fire the gun, firing member 6! is moved so the notch H releases protuberance l2 and the lug 63 will force sear 6| away from the bolt due to the pressure of the firing spring.

The firing member or sear releasing member 67 also has an abutment 13 in which is mounted a bolt 14 having a head 35 on the underside of the abutment and secured by

nuts

16, 16, on the upper side of the abutment. A light compression spring 1'. surrounds bolt 79 and has one end in engagement with nut l5 and the other end in engagement with frame member 13 so the spring normally forces the firing member 6! in a clockwise direction about its pivot pin 68 so extending arm 69 is moved with its notch 1! toward engagement with protuberance 12. A hammer 8| is arranged between abutment l9 and extending arm 69 of the firing member and has its upwardly extending bifurcated arm 82 pivotally connected by a pin 83 to the firing member 61. The hammer 8| has a shoulder 84 for engaging bolt head '55 on the abutment 73. Positioned between the hammer 8i and extending arm 69 is a compression spring 95 having one end arranged in a recess 86 in the depending arm 69 and its other end arranged in a recess 87 in the hammer 8| so the hammer has its shoulder 84 normally forced by spring 85 toward engagement with abutment 13.

Hammer 8| has its lower portion bifurcated to form sides 88 and 89 for receiving a trigger 9| pivoted on a pin 92 extending between the sides 86 and 89. The trigger has a shoulder 93 for engaging abutment 94 on the hammer between the sides 88 and 89. Extending f0rward 1y from the body of the trigger 9| is a latch arm 95 provided with a flat cam surface 96 for engaging the end of the depending arm 69 when the trigger 9| is pressed forwardly. At its forwardmost position, the trigger 9| has a shoulder 91 on the latch arm 95 which engages a latch 98 on the end of depending arm 69.

As shown in Fig. '7, the parts of the set trigger mechanism are arranged in heavy-pull position where shoulder 84 of the hammer 8| is in engagement with abutment bolt head 15 on abutment 13 so pressure applied to the trigger 9| will be transmitted through trigger shoulder 93 and hammer abutment 94, hammer shoulder 84 and firing member abutment 13 to turn the firing member 61 in a counterclockwise direction about its pivot pin 68 against the pressure of spring ll, thereby. removing notch H from protuberance 12 (Fig. 8) and releasing the sear 6| so its projection 62 will be forced away from the bolt by the sloping surface of lug 63 and the gun will be fired. The pull necessary to effect this firing of the gun must be sufiicient to overcome the a pressure of spring TI and the'friction between the notch II and protuberance l2. I-Ience,this pull is a relatively heavy one.

After being fired, upon re-cocking of the gun, the bolt is moved rearwardly and spring 65 forces sear 6| into engagement with lug 63 where it is held by firing member 61. The hammer 8| and trigger 9| automatically assume their heavy-pull positions, as shown in Fig. 7.

When it is desired to set the trigger mechanism in its light-pull position, the trigger 9| is moved forwardly from its position shown in Fig. 7 toward its position as shown in Fig. 9. During this forward movement, substantial pivotal movement of trigger 9| about its pivot pin 92 is prevented by engagement of cam surface 96 with the end of extending arm 69 so the hammer 8| is moved in a clockwise direction by the forward movement of the trigger 9|. This movement of the hammer 8| with respect to depending arm 69 of the firing member compresses spring and also moves shoulder 84 away from abutment 13. When the hammer reaches light-pull position, as illustrated in Fig. 9, latch 98 on the depending arm 69 rides over shoulder 91 on the trigger latch arm so the trigger 95 may pivot about its pin 92 to separate the shoulder 93 from abutment 99 on the hammer 8|, and, at the same time, lock the hammer 8| in light-pull position by engagement of its latch arm with the latch 98. When the hammer 8| is, thus pivoted to light-pull position, its shoulder 84 is held spaced from bolt head '55 on abutment 13 against the compression of spring 95. In this light-pull positionja light pressure applied to trigger 9| will turn it in a counter-clockwise direction about its pin 92, thereby releasing latch arm 95 from latch 98 of the depending arm 69. This permits spring 85 to force hammer 8| in a counter-clockwise direction until it strikes bolt head 15 on abutment 13. This blow of the hammer 8| on abutment 13 of the firing member 67 causes the firing member to turn slightly in a counter-clockwise direction about its pivot pin 68 so notch 1| releases protuberance 12 and the sear 6| may be moved so the gun will fire. Thus, the blow of hammer 8| overcomes the force of spring 11 and the friction between protuberance i2 and notch 1| so the gun is fired by the light pressure on trigger 9| necessary to release shoulder 91 on latch arm 95 from latch 98,

In both forms of the invention illustrated in the drawings, the hammer is positioned between a depending arm of the firing member and an abutment on the firing member. A spring between the depending arm and the hammer normally forces the hammer into engagement with the abutment. A trigger pivoted onthe hammer may be pressed to transmit a heavy pressure through the hammer to the abutment and thereby move the firing member to fire the gun. When it is desired to set the trigger mechanism in light-pull position, the trigger is moved forwardly so it moves the hammer away from the abutment on the firing member against the compression of the spring between the extending arm and the hammer. The hammer is latched in this position by cooperation of a latch arm on the trigger with a latch on the extending arm of the firing member. A light pressure on the trigger to pivot it releases the latch and permits the spring to force the hammer toward the abutment so the hammer strikes the abutment with a blow which causes movement of the firing member and thereby fires the gun.

In addition to providing a set trigger mechanism with a single trigger itself shiftable between heavy-pull and light-pull positions, this invention provides a set trigger mechanism which may be incorporated in most rifles Without major changes in the mechanism. Most rifles have a firing member or sear releasing member which is moved to fire the gun. In some instances the shape of this firing member need not be changed. In others, it may be necessary to substitute a firing member having an abutment and an extending arm. Ihe hammer is pivotally mounted so it is arranged between the abutment and the arm and a spring is arranged between the arm and the hammer. Usually this hammer is substituted for a solid trigger which is normally positioned to engage an abutment on the firing member. Instead of such a solid trigger, the present invention substitutes a hammer carrying a pivoted trigger with a latch arm on the trigger. Thus, it is a relatively simple matter to convert the trigger mechanism of most rifles to a set trigger mechanism having a single trigger shiftable between heavy-pull and light-pull positions.

What is claimed is:

1. A set trigger mechanism for a gun comprising a firing member movable to fire the gun, a hammer for moving said member, an abutment on said hammer, a trigger pivoted on said hammer engageable with said abutment, said hammer being movable by movement of said trigger against said abutment to move said member, said hammer being shiftable by said trigger between a heavy-pull position in engagement with said member and a light-pull position out of engagement with said member, a spring acting on said hammer to urge it toward engagement with said member, and a latch for holding said hammer in light-pull position against the action of said spring with said trigger spaced from said abutment, said latch being releasable by pivotal movement of said trigger toward said abutment.

2. A set trigger mechanism for a gun comprising a firing member movable to fire the gun, a pivotally mounted hammer for moving said member, an abutment on said hammer, a trigger pivoted on said hammer engageable with said abutment, said hammer being movable by movement of said trigger against said abutment to move the said member, said hammer being shiftable about its pivot by said trigger between a heavy pull position in engagement with said member and a light-pull position out of engagement with said member, a spring acting on said hammer to urge it. toward engagement with said member, and a latch for holding said hammer in light-pull position against the action of said spring with said trigger spaced from said abutment, said latch being releasable by pivotal movement of said trigger toward said abutment.

3. In a set trigger mechanism for a gun, a hammer movable to fire the gun, an abutment on said hammer, a trigger pivoted on said hammer and engageable with said abutment, said hammer being movable in one direction by rearward movement of said trigger against said abutment and movable in the opposite direction to a light-pull position by forward movement of said trigger, a spring yieldingly urging said hammer in said one direction, and a latch for holding said hammer in light-pull position against the action of said spring with said trigger spaced from said abutment, said latch being releasable by pivotal movement of said trigger toward said abutment.

4. A set trigger mechanism for a gun comprising a sear releasing member having an extending arm and an abutment by which the member is moved to fire the gun, a hammer arranged between said arm and said abutment for engaging said abutment to move said member, a compression spring between said hammer and said arm forcing said hammer toward said abutment, a trigger on said hammer, and a latch operable by said trigger for holding said hammer out of engagement with said abutment against the force of said spring.

5. A set 'rigger mechanism for a gun comprising a scar releasing member having an extending arm and an abutment by which the member is moved to fire the gun, a pivotally mounted hammer arranged between said arm and said abutment for engaging said abutment to move said member, a compression spring between said hammer and said arm forcing said hammer about its pivot toward said abutment, a trigger on said hammer, and a latch operable by said trigger for holding said hammer out of engagement with said abutment against the force of said spring.

6. A set trigger mechanism for a gun comprising a sear releasing member having an extending arm and an abutment by which the member is moved to fire the gun, a pivotaliy mounted hammer arranged between said arm and said abutment for engaging said abutment to move said member, a compression spring between said hammer and said arm forcing hammer toward said abutment, an abutment on said hammer, a trigger pivoted on said hammer for engaging the abutment on said hammer to move the hammer and the member, and a latch for holding said hammer out of engagement with the abutment on said member against the force of said spring with said trigger spaced from the abutment of said hammer, said latch being releasable by pivotal movement of said trigger toward the abutment on said hammer.

'7. A set trigger mechanism for a gun comprising a scar releasing member having an extending arm and an abutment by which the member is moved to fire the gun, a latch member on said extending arm, a pivotally mounted hammer arranged b-etween said arm and said abutment, a compression spring between said hammer and said arm, an abutment on said hammer, a trigger pivoted on said hammer for engaging said abutment, and a latch arm projecting from said trigger toward said extending arm for engaging said latch member to hold said hammer disengaged from the abutment on said member and said trigger disengaged from the abutment on said hammer, said latch arm being releasable from said latch member by pivotal movement of said trigger toward the abutment on said hammer.

8. A set trigger mechanism for a gun comprising a sear releasing member having an extending arm and an abutment by which the member is moved to fire the gun, a hammer pivoted on said member and arranged between said arm and said abutment, a trigger on said hammer for moving it against said abutment to move said member and to shift the hammer between a heavy-pull position in engagement with said abutment and a light-pull position out of engagement with said abutment, a spring between said arm and said hammer tending to force said hammer into engagement with said abutment, and a latch operable by said trigger for holding said hammer in light-pull position against the force of said spring.

9. A set trigger mechanism for a gun comprising a sear releasing member having an extending arm and an abutment by which the member is moved to fire the gun, a hammer pivoted on said member and arranged between said arm and said abutment, an abutment on said hammer, a trigger pivoted on said hammer for engaging the abutment on said hammer and for shifting the hammer between a heavy-pull position in engagement with the abutment on said member and a light-pull position out of engagement with the abutment on said member, a spring between said arm and said hammer forcing said hammer toward engagement with the abutment on said member, and a latch for holding said hammer in light-pull position against the action of said spring with said trigger spaced from the abutment on said hammer, said latch being releasable by pivotal movement of said trigger toward said abutment.

10. A set trigger mechanism for a gun comprising a sear releasing member having an extending arm and an abutment by which the member is moved to fire the gun, a hammer pivoted on said member and arranged between said arm and said abutment, an abutment on said hammer, a trigger pivoted on said hammer for engaging the abutment on said hammer and for shifting the hammer between a heavy-pull position in engagement with the abutment on said member and a lightpull position out of engagement with the abutment on said member, a spring between said arm and said hammer forcing said hammer toward engagement with the abutment on said member, a latch member on said extending arm, and a latch arm projecting from said trigger toward said latch for engaging said latch to hold said hammer in light-pull position against the force of said spring with said trigger spaced from the abutment on said hammer, said latch arm being releasable from said latch member by pivotal movement of said trigger toward the abutment on said hammer.

11. A set trigger mechanism for a gun comprising a movable gun firing member, a movably mounted hammer, engageable with said member to move it, a spring yieldingly urging said hammer toward engagement with said member, a trigger on said hammer movable with said hammer and independently thereof, said hammer being movable in one direction by said trigger to 1. 10 move said gun firing member and movable in the opposite direction by said trigger to a light-pull position spaced from said member, and a latch releasable by said trigger for retaining said hammer in light-pull position against the forces of said spring.

12. A set trigger mechanism for a gun comprising a movable gun firing member, a movably mounted hammer engageable with said member to move it, a spring yieldingly urging said hammer toward engagement with said member, a trigger pivoted on said hammer, said hammer being movable in one direction by said trigger to move said gun firing member and movable in the opposite direction by said trigger to a light-pull position spaced from said member, and a latch releasable by pivotal movement of said trigger in said one direction for retaining said hammer in light-pull position against the force of said spring.

13. A set trigger mechanism for a gun comprising a movable gun firing member, a pivotally mounted hammer engageable with said member to move it, a spring yieldingly urging said hammer toward engagement with said member, a

trigger movably mounted on said hammer, said hammer being movable by rearward movement of said trigger to engage and move said member and movable by forward movement of said trigger to a light-pull position spaced from said member, and a latch releasable by rearward movement of said trigger relative to said hammer for retaining said hammer in light-pull position against the force of said spring.

14. In a set trigger mechanism for a gun having a gun firing member, a movably mounted hammer, a trigger movable on said hammer, a spring yieldingly urging said hammer in one direction, said hammer being movable in said one direction by rearward movement of said trigger, and movable in the opposite direction to light-pull position spaced from the gun firing member by forward movement of said trigger, and a latch for retaining said hammer in light-pull position, said latch being releasable by rearward movement of said trigger relative to said hammer.

15. In a set trigger mechanism for a gun, a pivotally mounted hammer, a trigger pivoted on said hammer, a spring yieldingly urging said hammer in one direction, said hammer being movable on its pivot in said one direction by rearward movement of said trigger and movable on its pivot in the opposite direction to a light-pull position by forward movement of said trigger, and a latch for retaining said hammer in said lightpull position, said latch being releasable by rearward movement of said trigger on its pivot relative to said hammer.

ELMER E. MILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 346,941 Patterson Aug. 10, 1886 794,770 Barning July 18, 1905 1,215,181 Newton Feb. 6, 1917 1,581,763 Newton Apr. 20, 1926 FOREIGN PATENTS Number Country Date 554,287 Germany July 7, 1932