US3397474A

US3397474A - Trigger, sear, safety assembly

Info

Publication number: US3397474A
Application number: US646094A
Authority: US
Inventors: Joseph A Badali
Original assignee: Olin Corp
Current assignee: Olin Corp
Priority date: 1967-06-14
Filing date: 1967-06-14
Publication date: 1968-08-20
Anticipated expiration: 1985-08-20

Description

Aug. 0, 1968 J. A. BADALI 3,397,474

TRIGGER, SEAR, SAFETY ASSEMBLY Filed June 14, 1967 INVENTOR JOSEPH A. BAD/1L! United States Patent 3,397,474 TRIGGER, SEAR, SAFETY ASSEMBLY Joseph A. Badali, Branford, Conn., assignor to Olin Mathieson Chemical Corporation, a corporation of Virginia ,Filed June 14, 1967, Ser. No. 646,094 3 Clai s. (CI. 42-70) ABSTRACT OF THE DISCLOSURE The invention is a trigger, sear, and safety assembly for a firearm wherein the trigger is pivoted to a sear which is pivoted to the receiver, and the sear safety comprises a safety lever having an L-shaped slot, the lever being pivotally mounted upon the receiver.

A feature of the invention is the provision of a novel trigger, sear, safety assembly for a firearm where the assembly is fabricated of a minimum number of parts, each of simple, uncomplicated design so that the piece parts are readily formed by simple stamping operations.

A further feature of the invention is the provision of a reliable safety movable from a first position defining a safe position to a second position defining a ready-to-fire position in which frictional means are provided for retaining the safety in either position against inadvertent or unexpected movement.

A trigger, sear, safety assembly embracing certain features of the invention may comprise a receiver member housing a bolt-firing pin assembly, a sear having opposed ends pivotally mounted to the receiver immediate said ends, spring means positioned between the receiver and one end of said sear operable to drive the sear relative to the receiver in a clockwise direction, so that said other end is urged toward said assembly, a trigger pivotal ly mounted to the sear movable relative to the sear and movable into contact with said receiver to effect a lever action to pivot the sear in a counterclockwise direction, a safety lever formed with a slot pivotally mounted to the receiver and movable from a first position defining a safe position to a second position defining a ready-tofire position and a link pin carried by the sear having an end thereof received within said slot, said link pin and said slot cooperating when said safety lever is in said first position to block motion of the sear by the trigger, said pin and said slot further cooperating to free the sear to permit said counterclockwise motion of the sear when the safety lever is in the second position.

Other features and advantages of the invention will become more apparent from an examination of the succeeding specification when read in conjunction with the appended drawings, in which:

FIG. 1 is a side elevation of a portion of a firearm embracing the invention;

FIG. 2 is a sectional view of FIG. 1 in the plane of the line 2--2 as viewed in the direction indicated by the arrows; and

FIG. 3 is an exploded view of the safety piece parts as viewed from the left end of FIG. 1.

Referring now to the drawings, the reference numeral designates a receiver or a receiver member housing a bolt-firing pin assembly 11.

Sear 12 pivotally mounted to the receiver 10 at 13 is formed with

opposed ends

14 and 16.

Coil spring 17 is interposed between receiver 10 and sear end 14 operative to drive the sear about pivot 13 in a counterclockwise direction urging sear end 16 toward bolt-firing pin assembly 11 to hold the firing pin cocked in the usual manner.

3,397,474 Patented Aug. 20, 1968 'ice Trigger 18 pivotally mounted to the sear 12 at 19 is movable relative to the sear and is also movable into contact with the receiver 10 as at 21 to effect a lever action.

For example, when the trigger is moved from the solid line position of FIG. 1 to the dotted line position thereof, the trigger pivots about point 19 and makes contact with the receiver 10 at 21 effective to drive the sear in a counterclockwise direction against coil spring 17 from the solid line position of the sear to the dotted line position thereof.

Obviously, this lever action of the trigger 18 in cooperation with receiver 10 at point 21 is'the function which clears the firing pin and permits detonation of a cartridge in the usual fashion.

The end 16 of sear 12 is formed with a pair of spaced, through apertures 2222 operative to receive and frictionally hold a roll pin 23.

As is most apparent in FIGS. 2 and 3, roll pin 23 has a long projection 24 which is received within and cooperates with an L-shaped slot 26 formed in a safety lever 27.

The safety lever 27, formed with an operating tab 28, is retained pivotally and supported on the receiver 10 by means of la shouldered screw 29.

The safety lever 27 is movable from a first or solid line position, shown in FIG. 1, defining a safe position to a second or dotted line position defining a ready-tofire position.

As is further apparent in FIGS. 2 and 3, a shank 31 formed on screw 29 also supports a detent spring or safety spring defining a stamping 32 having a shoulder 33 and a protuberance or button 34.

The spring 32 is sandwiched between the safety lever 27 and the receiver 10 as shown most clearly in FIG. 2.

Shoulder 33 rests upon a mating flat formed on the receiver 10 and cooperates with aperture 36 and mating shank 31 to retain the safety spring 32 fixed against relative motion.

The safety spring 32, and in particular its protuberance 34, operates to generate friction between the safety lever and the receiver in that when the safety lever is in the solid line position of FIG. 1 protuberance 34 bears upon the underside of the lever with sufficient pressure to develop appreciable resistance to rotation.

Correspondingly, when the safety lever is in the second or ready-to-fire position the protuberance 34 snaps into engagement with or is received within slot 26 as shown in FIG. 1.

Thus, the inherent resilience of safety spring 32 in combination with protuberance 34 cooperate to retain the safety lever in the first or second position, as the case may be.

Operation As is most apparent in FIG. 1, when the safety lever 27 is in the solid line position the disposition of the slot 26 and the end 24 of roll pin 23 is such that the lever action, previously described, is blocked in that it is im possible to move the end 16 of the sear 12 from its solid line position to the dotted line position.

In contrast, when the safety lever 27 is rotated to the dotted line position of FIG. 1, the relationship between roll pin 23 and slot 26 is such that there is adequate clearance in the slot to permit the sear end .16 to move counterclockwise about its pivot 19 in response to the lever action of trigger 18 to permit sear end 16 to drop downwardly from its solid line position to its dotted line position thereby releasing a firing pin in the usual fashion.

It is anticipated that numerous modifications in the disclosure embodiment of the invention may be devised without departing from the spirit and scope thereof.

What is claimed is:

1. A trigger, sear, safety assembly for a firearm comprising a receiver member housing a bolt-firing pin assembly, a scar having opposed ends pivotally mounted to the receiver intermediate said ends, spring means positioned between the receiver and one end of said sear operable to drive the sear relative to the receiver in a clockwise direction, so that said other end is urged toward said assembly, a trigger pivotally mounted to the sear movable relative to the scar and movable into contact with said receiver to eifect a lever action to pivot the sear in a counterclockwise direction, a safety lever formed with a slot pivotally mounted to the receiver and movable from a first position defining a safe position to a second position defining a ready-to-fire position and a roll pin carried by the sear having an end thereof received within said slot, said roll pin and said slot cooperating when said safety lever is in said first position to block motion of the sear by the trigger, said pin and said slot further cooperating to free the sear to permit said counterclockwise motion of the sear when the safety lever is in the second position.

2. The assembly of claim 1 in which a detent spring is interposed between the safety lever and the receiver, said spring having a protuberance developing sufficient frictional contact with said safety lever to retain the lever in said first position and said protuberance being further operative to project into said slot when the lever is in the second position to retain said lever in the second position.

3. A trigger, sear, safety combination for a firearm comprising a receiver member housing a bolt-firing pin assembly, a sear pivotally mounted upon the receiver, spring means between the receiver and the sear operable to drive the sear in a clockwise direction into contact with said assembly, a trigger pivotally mounted upon the scar and operable to contact the receiver and drive the sear in a counterclockwise direction, a safety lever having an L-shaped slot pivotally mounted upon the receiver, a pin carried by the sear operable to engage said slot to block motion of said sear.

References Cited UNITED STATES PATENTS 2,451,003 10/1948 Syrjala 42-70 2,843,960 7/1958 Larsson 42--70 BENJAMIN A. BORCHELT, Primary Examiner.