US3142923A - Bolt assembly comprising a pivoted firing pin serving also as the ejector and an extractor - Google Patents

Bolt assembly comprising a pivoted firing pin serving also as the ejector and an extractor Download PDF

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Publication number
US3142923A
US3142923A US178972A US17897262A US3142923A US 3142923 A US3142923 A US 3142923A US 178972 A US178972 A US 178972A US 17897262 A US17897262 A US 17897262A US 3142923 A US3142923 A US 3142923A
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US
United States
Prior art keywords
firing pin
extractor
bolt
cartridge
operative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US178972A
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English (en)
Inventor
Edwin S Vartanian
Joseph A Badali
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olin Corp
Original Assignee
Olin Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE629501D priority Critical patent/BE629501A/xx
Application filed by Olin Corp filed Critical Olin Corp
Priority to US178972A priority patent/US3142923A/en
Priority to GB7910/63A priority patent/GB973940A/en
Priority to DEO9284A priority patent/DE1213302B/de
Priority to ES285928A priority patent/ES285928A1/es
Application granted granted Critical
Publication of US3142923A publication Critical patent/US3142923A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A15/00—Cartridge 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
    • F41A15/12—Cartridge 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
    • F41A15/14—Cartridge 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 or within the bolt; Extractors per se
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/13—Percussion or firing pins, i.e. fixed or slidably-mounted striker elements; Mountings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/36—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
    • F41A3/38—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes
    • F41A3/40—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes mounted on the bolt

Definitions

  • This invention relates to a bolt assembly for firearms and to a method of fabricating and assembling the same.
  • the bolt mechanism disclosed is suitable for use in automatic, semi-automatic, lever action or slide actuated firearms, and is thus adapted for use in a complete line of firearms having a maximum number of similar and interchangeable parts.
  • the present invention provides a bolt assembly which performs all these functions with a minimum number of moving elements all of which are carried by the bolt.
  • the firing pin is a single integral element which also functions as an extractor and as an ejector.
  • the only other moving element in the bolt is an extractor claw which cooperates with the firing pin as a twin extractor to withdraw the spent cartridge from its firing position.
  • the novel bolt of this invention provides all the advantages of simplicity, dependability and economy in a single integral unit which performs all the functions of a bolt, firing pin, extractor, and ejector.
  • Another object of this invention is to provide a novel bolt assembly having a firing pin which is a single integral element functioning as a firing pin, extractor and ejector.
  • a further object of this invention is to provide a novel method of forming and assembling a bolt assembly for firearms.
  • Another object of this invention is to provide a bolt assembly for firearms which has a minimum number of parts, is simple in design and which can be readily and economically produced.
  • FIGURE 1 illustrates a bolt generally designated 1, slidably mounted in the receiver 2 of a firearm.
  • a barrel 3 is secured to the front of receiver 2 by screw threads 4 or equivalent means.
  • the bolt 1 is shown in FIG. 1 in its firing position in the receiver 2 with locking plate 5 engaged in a notch 6 in the receiver.
  • the bolt 1 abuts a cartridge 7, which is shown in firing position in the barrel 3.
  • a projection 8, on the side of the bolt 1 actuates the operating lever 9 of a feed mechanism not shown.
  • a hammer 15 is mounted in the come apparent from the following description and drawreceiver by means not shown and is positioned to impact the firing pin when the bolt mechanism is in the firing position shown in FIG. 1 and the hammer is released by means not shown.
  • the locking plate 5 may be either omitted or locked in a retracted position flush with the top face of the bolt 1 to add weight to the bolt.
  • Another alternative is to make the upper surface of the bolt solid by omitting the recess provided for the locking plate.
  • Operating lever 10 is also omitted along with its actuating mechanism, and a spring (not shown) is interposed in the receiver between the rear wall of the bolt and the rear wall 14 of the receiver.
  • the bolt 1 is most clearly shown in FIGS. 2-6 and will be described in detail with particular reference to FIGS. 2-6.
  • the bolt 1 has a generally rectangular body portion 16 and a tapered nose portion 17 at the front end thereof.
  • the rear end of the bolt 1 terminates in a generally flat rear face 18, which may be provided with a circular recess 19.
  • the top face of the bolt is recessed at 20 to accommodate the locking plate 5.
  • Side wall 21 of the bolt is provided with a recess 29A to accommodate arm 13 of locking plate 5.
  • the bottom surface of the bolt indicated at 22 is provided with a slot throughout its length generally indicated at 23 to accommodate portions of the feed mechanism (not shown) and the upper portion of hammer 15 as the bolt is moved rearwardly to its ejecting position.
  • the bolt 1 is made up of two separate sintered metal sections including an upper section 24 and a lower section 25 which are assembled in a manner which will be described in detail below.
  • the sections have mating faces joined along the line 26 (FIG. 3) and are recessed to accommodate a firing pin 27, an extractor claw 28, a
  • FIGURE 4 is a front end View of the bolt mechanism I shown in FIGURE 2.
  • FIGURES is a rear end view of the bolt mechanism shown in FIGURE 2.
  • FIGURE 6 is a sectional view taken along the line Lower section 25 is shown in detail in FIG. 6 with the firing pin 27, extractor claw 28, spring 29 and plungers 30 and 31, shown positioned in the recessed portion 32.
  • the recessed portion has an irregular shape to accommodate the various elements positioned therein as is apparent from an inspection of FIG. 6.
  • Upper section 24 of bolt 1 is provided with a recess which is complimentary to the recess 32 shown in section 25 and for that reason is not illustrated.
  • Firing pin 27 is a rigid elongated element, extending beyond the ends of the bolt and is provided with a plurality of offset portions or projections.
  • the front part of the firing pin 27 is designated an extractor portion 33 which may be provided with a recess 34 adapted to engage and grip the rim of cartridge 7 when the bolt is in the firing position shown in FIG. 1.
  • the extractor portion 33 of the firing pin 27 engages the outer periphery of a cartridge such as cartridge 7 shown in FIG. 1 and cooperates with extractor claw 28 to function as twin extractors in removing the cartridge from the barrel.
  • the recess 34 in the extractor portion 33 may be provided to aid in gripping the rim of the cartridge but is not considered to be necessary for most firearms and may be omitted.
  • a first projection 35 Spaced inwardly of the extractor portion 33 is a first projection 35, which has a front face 36 and a rearwardly tapered cam surface 37.
  • Front face 36 is adapted to contact the end face 7A of a cartridge 7 such as shown in FIG. 1, to fire the cartridge when the firing pin 27 is impacted by the hammer 15.
  • the cam surface 37 is adapted to ride on the bottom wall 38 of a slot in the tapered nose portion.
  • the slot in the tapered nose portion is merely a continuation of recess 32 extending into the tapered nose portion.
  • the rear end of the firing pin 27 has a face 39, adapted to engage the rear wall 14 of the receiver when the bolt is moved to its rearward ejecting position.
  • the rear end of the firing passed from a source (not shown) through electrode 74, the bolt section 24, the projections 5155, section 25, through electrode 75 and back to the source. Sufficient current is passed through projections 51-55 to melt these projections by resistance heating. Pressure is then applied to the plates 70 and 71 by means not shown, to press the bolt sections 24 and 25 into mating contact as shown in FIG. 3.
  • the bolt 1 after having been fused into a single integral unit is then provided with a firing pin, extractor claw, plungers and a spring. This is done by first inserting extractor claw 28 into the recess 32 through the front of I the bolt. Plunger 31, spring 29 and plunger 30 are then pin is cut away to define a second face 40 projecting outp 7 wardly beyond the rear face of the bolt 1.
  • This second face 40 is adapted to be engaged by hammer 15 to impart a slight forward movement to the firing pin 27 which is effective to bring face 36 of the firing pin into impacting engagement with the end face 7A of cartridge 7 to fire the cartridge.
  • a second projection 41 on "the firing pin 27 is adapted to be engaged by plunger 30, which urges the firing pin rearwardly due to the action of spring 29.
  • Plunger .30 has a rounded cap portion A which functions as a pivot about which the firing pin 27 rotates as the firing pin is moved forwardly by the engagement of surface 39 with rear wall 14 of the receiver.
  • a third projection 42 on the firing pin 27 engages pin 43, mounted in the body of the bolt to limit the rearward movement of the firing pin 27.
  • Extractor claw 28 is mounted on pivot pin 44, which passes through the body sections. Extractor claw 28 is engaged by plunger 31 and is urged in a counterclockwise direction toward the firing pin by the action of spring 29 which acts on plunger 31.
  • the extractor claw 28 is provided with a hook portion 45, which engages behind the rim of a cartridge such as cartridge 7 in FIG. 1 and cooperates with notch 34 on the firing pin to function as a twin extractor to remove the cartridge 7 from its firing position in the barrel shown in FIG. 1.
  • the bolt body is formed from two sintered metal sections designated upper section 24 and lower section 25.
  • One of the sections is formed with a plurality of raised projections such as projections 50-55 shown in FIGS. 6 and 7. It is apparent that these projections may be formed on either section 24 or 25.
  • Each of the projections 50-55 is surrounded by a recess indicated by reference numerals 56-61. The recess surrounding each projection provides a place for the excess metal of the projection to flow into when the projections are melted by resistance heating to fuse the sections 24 and 25 together as will be described.
  • the sections 24 and 25 are assembled with their mating surfaces spaced only by the projections 50-55 and placed in a fixture such as is illustrated in FIG. 7.
  • the fixture has a fixed lower plate 70 and a movable upper plate 71 which is movable by means not shown.
  • the mating faces 72 and 73 of the plates 70 and 71 are provided with electrodes 74 and 75 which are in contact with the sections 24 and 25 of the bolt.
  • a current is assembled and inserted into recess 32 through the opposite end.
  • Firing pin 27 is then inserted into the recess 32 through the rear of the bolt a sufiicient distance to allow projection 35 on the firing pin to clear the extractor claw.
  • Extractor claw 28 is then pinned in place by pivot pin 44.
  • Projection 41 on the firing pin engages plunger 30 and compresses the spring 29 as the firing pin is fully inserted.
  • Pin 43 is then provided to engage projection 42 on firing pin 27 and locks the entire assembly in place.
  • FIG. 1 shows bolt 1 locked in firing position with locking plate 5 engaged in recess 6 of receiver 2.
  • Extractor claw 28 is engaged with the rim of cartridge 7 on one side of the cartridge and extractor portion 33 of firing pin 27 engages cartridge 7 in diametrically opposed relation to extractor claw 28.
  • Spring 29 is compressed during the forward movement of the firing pin and acts with increased force on extractor claw 28, thus increasing the grip of the extractor claw on the cartridge as it goes through the ejection cycle.
  • the inward movement of the front of the firing pin as the pin is being moved forward by the contact of face 39 with wall 14 is effective to pivot the spent cartridge about the hook portion 45 of the extractor claw and to eject the cartridge through an appropriate opening in the receiver.
  • the firing pin 27 performs the three separate functions of a firing pin, an extractor, and an ejector.
  • a bolt assembly for firearms comprising a body having two ends, a tapered nose portion at one end, a firing pin movably mounted in said body and protruding beyond the ends of the body, an extractor claw pivotally mounted in said body, a forward end of the firing pin having an extractor portion operative to engage the outer periphery of a cartridge, a projection on said firing pin positioned inwardly of the extractor portion and operative to contact an end face of said cartridge, said projection having a rearwardly extending cam surface operative to ride on said tapered nose portion to allow said firing pin to move toward said extractor claw as the firing pin moves forwardly relative to the body, a rear end of the firing pin having a surface operative to engage the rear wall of a receiver to impart a longitudinal forward movement to the firing pin, a recess in the rear end of the firing pin defining a shoulder operative to be engaged by a hammer to impart a slight forward movement to the firing pin to fire said cartridge, said extractor claw having a hook portion extending beyond
  • a bolt assembly for firearms comprising a body having a tapered nose portion on the front end thereof and a flat surface at the rear end thereof, an extractor claw pivotally mounted in said body and having a hook portion extending beyond the end of said tapered nose portion, a firing pin movably mounted in said body for linear and pivotal movement, said firing pin having a first end and a second end, said first end of the firing pin having a portion protruding beyond said tapered nose portion and operative'to engage the peripheral surface of a cartridge, a first projection on said first end having a front surface operative to engage the end wall of a cartridge to fire said cartridge, said first projection having a rear cam surface operative to engage said tapered nose portion of the body, said second end of said firing pin protruding beyond said rear end of said body and having a first surface and a second surface, said first surface operative to be contacted by impact means to impart a first forward movement to said firing pin to fire said cartridge, said second surface operative to contact an end wall of the receiver and impart
  • a breech bolt assembly for firearms having a receiver and impact means mounted in the receiver to strike a firing pin mounted in the breech bolt assembly to fire a cartridge
  • said breech bolt assembly comprising a generally rectangular body member having a tapered nose portion atone end and an end wall at the opposite end, said body member having an internal recess adapted to accommodate a firing pin, an extractor claw and a spring, an extractor claw pivotally mounted in said recess, a firing pin slidably mounted in said recess for longitudinal and pivotal movement, said firing pin comprising a rigid member extending longitidinally of the breech bolt assembly and having a first end extending beyond said nose portion and operative to engage the outer periphery of a cartridge positioned ad jacent the nose portion, a second end of said firing pin extending beyond said end wall of said body member, a plurality of projections formed integral.
  • a first projection positioned adjacent said first end of said firing pin and having a front surface operative to engage the end face of said cartridge for firing said cartridge when the firing pin is moved longitudinally, said first projection having a rearwardly extending cam face operative to ride on said tapered nose portion to cam said first end of said firing pin toward said extractor claw when the firing pin is moved longitudinally of said body member, a second projection formed integral with said firing pin adjacent said second end, spring means mounted in said body member adapted.
  • said spring means is a coil spring provided with plungers at each end and having one plunger in engagement with said second projection and the other plunger in engagement with said extractor claw to pivot said extractor claw inwardly toward said first end of said firing pin.
  • a bolt assembly for firearms comprising a body, firing pin means slidably and pivotally mounted in said body to fire, extract and eject a cartridge, extractor claw means pivotally mounted in said body in diametrically opposed relation to said firing pin means, resilient means mounted in said body biasing said firing pin means rearwardly relative to said body and biasing said extractor claw means counterclockwise toward said firing pin means, a projection formed on a rearward portion of said firing pin means, one end of said resilient means engaging said projection to provide a pivot about which 7 v said firing pin can rotate, and stop means mounted in said body limiting the rearward movement of said firing pin means.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Resistance Welding (AREA)
  • Fuses (AREA)
US178972A 1962-03-12 1962-03-12 Bolt assembly comprising a pivoted firing pin serving also as the ejector and an extractor Expired - Lifetime US3142923A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE629501D BE629501A (ar) 1962-03-12
US178972A US3142923A (en) 1962-03-12 1962-03-12 Bolt assembly comprising a pivoted firing pin serving also as the ejector and an extractor
GB7910/63A GB973940A (en) 1962-03-12 1963-02-27 Bolt assembly for firearms
DEO9284A DE1213302B (de) 1962-03-12 1963-03-08 Schloss zum Verfeuern von Randfeuerpatronen in Handfeuerwaffen mit Schlaghammerzuendung
ES285928A ES285928A1 (es) 1962-03-12 1963-03-11 Una disposición de cerrojo para armas de fuego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US178972A US3142923A (en) 1962-03-12 1962-03-12 Bolt assembly comprising a pivoted firing pin serving also as the ejector and an extractor

Publications (1)

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US3142923A true US3142923A (en) 1964-08-04

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US178972A Expired - Lifetime US3142923A (en) 1962-03-12 1962-03-12 Bolt assembly comprising a pivoted firing pin serving also as the ejector and an extractor

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US (1) US3142923A (ar)
BE (1) BE629501A (ar)
DE (1) DE1213302B (ar)
ES (1) ES285928A1 (ar)
GB (1) GB973940A (ar)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906651A (en) * 1973-01-26 1975-09-23 Valmet Oy Cartridge case extractor mechanism for firearms having rotary breech closure
US3942277A (en) * 1972-05-03 1976-03-09 Atchisson Maxwell G Unitary firing pin and extractor
US4442619A (en) * 1981-12-21 1984-04-17 Mccarley Roy J Cartridge extraction tool
US5794373A (en) * 1995-09-29 1998-08-18 Moon; Kook-Jin Cartridge extractor
US5941004A (en) * 1997-12-03 1999-08-24 Pedersoli Davide & C. Di Pedersoli S.N.C. Pierangelo E Silvana Muzzle-loading rifles and breech-loading rifles
WO2020136639A1 (en) * 2018-12-25 2020-07-02 E At Z Technologies Ltd. Extractor assembly for pistols

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US768665A (en) * 1903-06-29 1904-08-30 Winchester Repeating Arms Co Recoil-operated firearm.
US936806A (en) * 1908-10-21 1909-10-12 John D Pedersen Combined firing-pin and ejector for firearms.
US1790320A (en) * 1931-01-27 Rjeising
US2104319A (en) * 1934-02-10 1938-01-04 Remington Arms Co Inc Manufacture of rifled tubes
US2742822A (en) * 1949-02-11 1956-04-24 Earle M Harvey Firing mechanism for automatic and semi-automatic firearms
US2977666A (en) * 1954-12-29 1961-04-04 Porter H Brace Method of making gun liner elements
US2984924A (en) * 1959-11-24 1961-05-23 Frederick P Reed Extractor assembly for firearms
US3014303A (en) * 1958-01-13 1961-12-26 Olin Mathieson Breech bolt with extractor and magazine-receiver assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101236A (en) * 1934-11-28 1937-12-07 Winchester Repeating Arms Co Cartridge-ejecting mechanism for firearms
US2425412A (en) * 1944-06-13 1947-08-12 Remington Arms Co Inc Firing mechanism for firearms
US2751702A (en) * 1955-01-19 1956-06-26 Remington Arms Co. Cartridge feeding in a tubular magazine firearm

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790320A (en) * 1931-01-27 Rjeising
US768665A (en) * 1903-06-29 1904-08-30 Winchester Repeating Arms Co Recoil-operated firearm.
US936806A (en) * 1908-10-21 1909-10-12 John D Pedersen Combined firing-pin and ejector for firearms.
US2104319A (en) * 1934-02-10 1938-01-04 Remington Arms Co Inc Manufacture of rifled tubes
US2742822A (en) * 1949-02-11 1956-04-24 Earle M Harvey Firing mechanism for automatic and semi-automatic firearms
US2977666A (en) * 1954-12-29 1961-04-04 Porter H Brace Method of making gun liner elements
US3014303A (en) * 1958-01-13 1961-12-26 Olin Mathieson Breech bolt with extractor and magazine-receiver assembly
US2984924A (en) * 1959-11-24 1961-05-23 Frederick P Reed Extractor assembly for firearms

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942277A (en) * 1972-05-03 1976-03-09 Atchisson Maxwell G Unitary firing pin and extractor
US3906651A (en) * 1973-01-26 1975-09-23 Valmet Oy Cartridge case extractor mechanism for firearms having rotary breech closure
US4442619A (en) * 1981-12-21 1984-04-17 Mccarley Roy J Cartridge extraction tool
US5794373A (en) * 1995-09-29 1998-08-18 Moon; Kook-Jin Cartridge extractor
US5941004A (en) * 1997-12-03 1999-08-24 Pedersoli Davide & C. Di Pedersoli S.N.C. Pierangelo E Silvana Muzzle-loading rifles and breech-loading rifles
WO2020136639A1 (en) * 2018-12-25 2020-07-02 E At Z Technologies Ltd. Extractor assembly for pistols

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Publication number Publication date
DE1213302B (de) 1966-03-24
ES285928A1 (es) 1963-08-16
BE629501A (ar)
GB973940A (en) 1964-11-04

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