US2618878A - Unitary trigger, sear, bolt stop, and cartridge ejector - Google Patents

Unitary trigger, sear, bolt stop, and cartridge ejector Download PDF

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Publication number
US2618878A
US2618878A US135077A US13507749A US2618878A US 2618878 A US2618878 A US 2618878A US 135077 A US135077 A US 135077A US 13507749 A US13507749 A US 13507749A US 2618878 A US2618878 A US 2618878A
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United States
Prior art keywords
trigger
bolt
shoulder
sear
firing pin
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Expired - Lifetime
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US135077A
Inventor
Lester F Mulno
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Harrington & Richardson Arms C
Harrington & Richardson Arms Co
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Harrington & Richardson Arms C
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Priority to US135077A priority Critical patent/US2618878A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00Breech mechanisms, e.g. locks
    • F41A3/64Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/68Bolt stops, i.e. means for limiting bolt opening movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A15/00Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun
    • F41A15/12Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns
    • F41A15/16Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns the ejector being mounted on the breech housing or frame
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/06Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/25Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
    • F41A19/27Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
    • F41A19/29Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
    • F41A19/30Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in bolt-action guns
    • F41A19/31Sear arrangements therefor

Description

L F. MULNO Nov. 25, 1952 UNITARY TRIGGER, SEAR, BOLT STOP, AND CARTRIDGE EJECTOR Filed Dec. 27. 1949 R. mm R mw m ./T F M A R E w EM Patented Nov. 25, 1952 UNl'lE srs UNITARY TRIGGER, SEAR, BOLT STOP, AND CARTRIDGE EJECTOR Application December 27, 1949, Serial No. 135,077
Claims.
This invention relates to new and improved trigger mechanisms for firearms and the principalobject of the invention resides in the provision of a single piece having a simple rocking motion, and which acts as trigger, sear, bolt stop, and shell ejector, i. e., a single trigger piece is so made as to do away with the necessity for having a separate sear, bolt stop, and shell ejector.
Another object of the invention resides in the provision of a trigger for firearms having a trigger pin and a trigger spring, said trigger rising above the trigger pin and terminating in a nose facing rearwardly, which nose engages a shoulder of the firing pin and holds the latter in cocked position, the trigger spring normally urging the trigger into this position; the provision of a trigger as above stated including a pair of forwardly facing spaced shoulders on the said trigger, one of said shoulders stopping the bolt upon retraction of the latter during recoil or upon cocking motion of the bolt, the other shoulder being located forwardly of the bolt stop shoulder in a position wherein it is struck by the expended cartridge case as the latter is withdrawn by means of the conventional extractor, said shoulder serving to eject the said spent cartridge case from the receiver.
Other objects and advantages of the invention will appear hereinafter.
Reference is to be had to the accompanying drawings in which Fig. 1 is a vertical section through the receiver and bolt of a firearm according to the invention;
Fig. 2 is a similar view with parts removed illustrating bolt fully retracted; and
Fig. 3 is a view similar to Fig. 2 but showing the trigger in firing pin releasing position.
As shown in Fig. 1, there is provided a firearm having a barrel [0 supported on a receiver 62 in which is located a reciprocatory bolt I d. The bolt is provided with a firing pin [5, the latter having a downwardly extending projection forming a cooking shoulder at Hi. The firing pin [6 is provided with a pair of oppositely acting springs 20 and 22 separated by a lug or the like 24. Spring 22 is relatively light and urges the firing pin to the right in Fig. 1, and spring 23 heavier and is the main spring of the firing pin and urges it to the left to firing position.
The stock 26 provides a housing for the trigger 28, the latter having a trigger pin 39 and a spring 32 hooked over a small pin 34 and extending about the firing pin to urge it in a clockwise direction.
The upper end of the trigger terminates in a shoulder or spur- 36 which acts as a sear nose and serves'to hold the firing pin in cocked position as by the projection I8, see Fig. 1, the projection l8 having a cam surface at 38 to provide for riding over the upper end of the trigger or spur 35 upon retractive motion of the bolt.
The spur 36 has a forwardly extending shoulder 46 and a second shoulder 52 also facing forwardly and in spaced stepped down relation thereto. Shoulder 42 is forward of and below shoulder :39 but well within the slot 44 in the underside of the bolt.
As shown in Fig. 3, when the trigger is pulled in a counterclockwise direction, the firing pin it is released and fires the shell 46. When the shooting finger releases the trigger, the trigger spring 32 brings the trigger back up into the Fig. 1 position except as it may be depressed slight- 1y by cam surface 38 during retraction of the bolt or of the firing pin. As the bolt is fully retracted, the forward shoulder 42, of course, is struck by the expanded cartridge case 46 which is extracted by the conventional bolt mounted extractors not shown, and the cartridge case is thereby ejected as the bolt moves back further. Any further retraction of the bolt is precluded by reason of the fact that a forward portion 48 of the bolt strikes shoulder 49, which is the bolt stop. The portion 48 is shorter than the distance between stops 4!] and 42. Of course, if the trigger is then pressed, the bolt may be completely re moved.
The purpose of spring 22 is to react against spring 20 after the shell is fired and retract the firing pin slightly from the forward face 50 of the bolt so as to normally lie behind and insure against prefiring of the succeeding cartridge.
Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is:
1. A firearm comprising a reciprocatory bolt, a firing pin therefor, a trigger, a trigger spring, a sear nose on the trigger, means on the firing pin to be engaged and held by the trigger sear nose in cocked position of the firing pin, a shoulder on the trigger in advance of the sear nose, said shoulder extending in advance of the forward face of the bolt in fully retracted position of the latter to eject a fired cartridge case.
2. A firearm comprising a reciprocatory bolt, a firing pin therein, a trigger, a sear nose on the trigger, a shoulder on the firing pin to be engaged by the trigger sear nose and held thereby in cocked condition, a shoulder on the trigger normally in the path of the bolt to stop the latter upon retraction thereof, a trigger spring normally urging the trigger to cocking bolt stopping position, and a second shoulder in advance of the first shoulder and in advance of the forward face of the bolt in retracted position of the latter, said second shoulder being adapted to be struck by and eject fired cartridge cases.
3. A firearm comprising a reciprocatory bolt, a firing pin therefor, a trigger, a trigger spring, a sear nose on the trigger, means on the firing pin to be engaged and held by the trigger sear nose in cocked position of the firing pin, a
shoulder on the trigger in advance of the searnose, said shoulder extending in advance of the forward face of the bolt in fully retracted position of the latter to eject a fired cartridge case, and another shoulder between the first shoulder and the sear nose engaging a portion of the bolt and stopping the retractive movement thereof except when the trigger is pressed.
4. A firearm comprising a retracting bolt, a firing pin, a trigger, a pair of spaced shoulders on the trigger, one shoulder engaging a part of the bolt in retracted position of the latter to stop the retractive motion thereof, and the other shoulder extending slightly forwardly of the front face of the bolt in retracted position thereof to be engaged by and eject a spent cartridge case.
5. A firearm comprising a retracting bolt, a
firing pin, a trigger, a pair of spaced shoulders on the trigger, one shoulder engaging a part of the bolt in retracted position of the latter to stop REFERENCES CITED The following references. are of record in the file of this patent: V
UNITED STATES PATENTS Number Name Date 1,542,477 Savage June 16, 1925 2,159,485 Loomis May 23, 1939 2,490,922 Rutherford et al'. Dec. 1 3-, I949
US135077A 1949-12-27 1949-12-27 Unitary trigger, sear, bolt stop, and cartridge ejector Expired - Lifetime US2618878A (en)

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US135077A US2618878A (en) 1949-12-27 1949-12-27 Unitary trigger, sear, bolt stop, and cartridge ejector

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US135077A US2618878A (en) 1949-12-27 1949-12-27 Unitary trigger, sear, bolt stop, and cartridge ejector

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758404A (en) * 1950-05-23 1956-08-14 Tabor Robert Braxton Gun firing mechanism
US2848831A (en) * 1956-06-01 1958-08-26 Neill S Mclaughlin Pistol
US2881547A (en) * 1955-07-29 1959-04-14 Olin Mathieson Multi-part breech bolt mechanism
DE1113165B (en) * 1957-03-27 1961-08-24 Mayer & Grammelspacher Mortise lock for firearms
US3013355A (en) * 1959-02-11 1961-12-19 Roy E Weatherby Firearm breech bolt mechanism with a bolt stop
US3394482A (en) * 1967-02-28 1968-07-30 Olin Mathieson Combined ejector and bolt stop
US9170063B2 (en) 2010-05-12 2015-10-27 John M. Krieger Firearm trigger assembly
USD746402S1 (en) * 2014-08-14 2015-12-29 Double Nickel Holdings, Llc Sear assembly for a striker fired handgun
US9410760B2 (en) 2014-07-30 2016-08-09 Double Nickel Holdings, Llc Sear assembly for hammerless, striker fired handgun
US9939221B2 (en) * 2014-09-11 2018-04-10 Thomas Allen Graves Flex-fire G2 technology

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1542477A (en) * 1919-09-10 1925-06-16 Arthur J Savage Firearm
US2159485A (en) * 1936-04-22 1939-05-23 Remington Arms Co Inc Firearm
US2490922A (en) * 1947-08-27 1949-12-13 Remington Arms Co Inc Firearm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1542477A (en) * 1919-09-10 1925-06-16 Arthur J Savage Firearm
US2159485A (en) * 1936-04-22 1939-05-23 Remington Arms Co Inc Firearm
US2490922A (en) * 1947-08-27 1949-12-13 Remington Arms Co Inc Firearm

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758404A (en) * 1950-05-23 1956-08-14 Tabor Robert Braxton Gun firing mechanism
US2881547A (en) * 1955-07-29 1959-04-14 Olin Mathieson Multi-part breech bolt mechanism
US2848831A (en) * 1956-06-01 1958-08-26 Neill S Mclaughlin Pistol
DE1113165B (en) * 1957-03-27 1961-08-24 Mayer & Grammelspacher Mortise lock for firearms
US3013355A (en) * 1959-02-11 1961-12-19 Roy E Weatherby Firearm breech bolt mechanism with a bolt stop
US3394482A (en) * 1967-02-28 1968-07-30 Olin Mathieson Combined ejector and bolt stop
US9170063B2 (en) 2010-05-12 2015-10-27 John M. Krieger Firearm trigger assembly
US9410760B2 (en) 2014-07-30 2016-08-09 Double Nickel Holdings, Llc Sear assembly for hammerless, striker fired handgun
USD746402S1 (en) * 2014-08-14 2015-12-29 Double Nickel Holdings, Llc Sear assembly for a striker fired handgun
US9939221B2 (en) * 2014-09-11 2018-04-10 Thomas Allen Graves Flex-fire G2 technology

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