US2159126A - Automatic firearm - Google Patents

Automatic firearm Download PDF

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Publication number
US2159126A
US2159126A US202545A US20254538A US2159126A US 2159126 A US2159126 A US 2159126A US 202545 A US202545 A US 202545A US 20254538 A US20254538 A US 20254538A US 2159126 A US2159126 A US 2159126A
Authority
US
United States
Prior art keywords
breech
pawl
block
casing
tube
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
US202545A
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English (en)
Inventor
Birkigt Marc
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Individual
Original Assignee
Individual
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Filing date
Publication date
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Publication of US2159126A publication Critical patent/US2159126A/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
    • 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
    • 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
    • F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
    • F41A19/27—Mechanical 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
    • F41A19/29—Mechanical 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
    • F41A19/30—Mechanical 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
    • F41A19/31—Sear arrangements therefor

Definitions

  • the present invention relates to automatic firearms and in particular, but not exclusively, light guns for use on aircrafts.
  • the tube of the arm is provided at the rear with a movable breech system adapted to recoil when a shot is red, against the action of. a counter spring, and to be locked, at least partly, when brought back into firing 0 position.
  • this movable breech system includes a breech block proper adapted to close the tube and hold the cartridge rmly in the chamber thereof, when' locked in said firing position, and a sliding part, carrying the firing pin,
  • the object of the present invention is to provide a breech mechanism of lthe type -above referred to which is better adapted to meet the requirements of practice than mechanisms used 0 up to the present time for the same purpose.
  • the sear or equivalent part adapted to hold the movable breech system in the rear position thereof, so as to stop the working of 5 the firearm and to control the action thereof cooperates with the locking member, carried by the movable breech system, which locks said breech system in the forward or firing position thereof.
  • Fig. 1 is an elevational view, partly in axial vertical section, showing the breech mechanism of an automatic firearm made according to the present invention
  • Fig.. 2 is a similar view of the same mechanism, with the parts occupying dilerent relative positions, corresponding' to another time of operation;
  • Fig. 3 is a sectional view on the line III- III
  • Fig. 4 is a vetical section on the line IV-IV of Fig. 1; v
  • Fig. 5 is a Vertical section on the line V-V of Fig. 2.I
  • a breech casing 2 is rigidly fixed. This casing 2 acts as a guide for the movable breech structure which will be described later.
  • Casing 2 is ⁇ provided with a cartridge feeding slot 3 and a diametrally opposed slot li for the ejection of the cartridge cases.
  • the movable breech structure which is slidable in said casing 2 is urged frontwardly by a counterspring 5, toward the position in which it closes the rear end of the barrel or tube.
  • this movable breech structure is made of two parts slidable relatively to each other in the direction of the general sliding displacement of the whole.
  • breech block proper 6 that is to say the part which forces and wedges the cartridges into the chamber of the barrel or tube of the gun.
  • the other part 8 movable longitudinally with respect to said breech block, carries the firing pin 9.
  • the breech block 6 carries, pivotally mounted thereon, at the lower part, a pawl 1 for the locking of said breech block, and said pawl is made of a material as hard as possible, for instance casehardened steel.
  • This pawl is adapted to oscillate between two extreme positions, which will be called hereinafter the upper position (Fig. 2) and the lower position (Fig. l.)
  • pawl 1 When pawl 1 is in the upper position, it interconnects the breech block 6 with the other breech element 8, this postiion being that occupied by the parts as long as the breech block is at the rear of its firing position.
  • I further provide. means for imparting a recoil movement to breech element 8 after each shot has been fired.
  • the means in question consist of a cyl-
  • the whole of the breech structure is held in its rear position by the following means:
  • a sear or cat'ch I4 carried by the breech casing is arranged normally to project into the inside of said casing so as to engage With the breech structure and to stop it at the beginning of its return stroke.
  • This rcatch is normally urged toward this stopping position by a spring pushpiece I5 slidable transversely in the breech casing.
  • Control means for releasing the breech structure from this locking action are constituted, in the example disclosed by the drawing, by a stirrup I6 operative by means of a cable I1.
  • the nose I4 of this sear or catch I4 instead of cooperating directly with the breech block, as it was the case up to the present time, engagesinto a notch, or the like, I8 provided in pawl 1, preferably in the rear middle portion thereof.
  • notch I8 nally becomes deteriorated by wear and tear, it sumces to change the locking pawl r1, instead of having to change the Whole of the breech block.
  • An automatic firearm which comprises, in combination, a tube, a breech structure movable with a longitudinal reciprocating motion in line with said tube at the rear thereof, a stationary guide for said breech structure rigid with said tube, a pawl pivoted to said breech sturcture adapted to cooperate with said guide for locking said breech structure in the front position thereof with respect tosaid tube, and lockingv means carried by said stationary guide adapted to cooperate with said locking pawl for holding said breech structure temporarily in rear position in said guide.
  • An automatic firearm which comprises, in combination, a tube, a breech structure movable with a longitudinal reciprocating motion in line with said tube at the rear thereof, a stationary casing with said tube for guiding said breech structure, said breech structure including a breech block and a firing pin carrier movable to a.
  • a pawl pivotedto said breech block adapted to cooperate with said casing for locking said breech block in the front position thereof with respect to said tube, said pawl being further adapted to lock said breech block with said ring pin carrier when said breech block is loing a breech block and a tiring pin carrier movable to a limited extent with respect to said breech block, a pawl pivoted atits front part to said breech block adapted to cooperate alternately with said casing when said breech block is in the front position for locking it in said poy,sition, and with said ring pin carrier for locking the latter with said breech block when said breech block is behind said front position, a pawl movably carried b'y said stationary casing adapted to cooperate with said rst mentioned pawl for locking said breech structure temporarily in rear position with respect to said -sta'tionary casing, and means for controlling said second mentioned pawl
  • An automatic rearm which comprises, in combination, a tube, a breech structure movable with a longitudinal reciprocating motion in line with said tube at the rear thereof, a stationary casing rigid with said tube for guiding said breech structure, said breech structure including a breech block and a firing pin carrier novable to a limited extent with respect to "said breechr block, a locking pawl pivoted at its front end to said breech block'adapted to cooperate alternately with said casing when said breech f block is in the front position f or locking it in said position, and with said firing pin carrier for locking the latter with respect to said breech block when said breech block is at the rear -of said front position, said pawl being provided with a notch in its intermediate portion; a catch y movably carried by said stationary casing so as to be able to engage into said notch for locking said breech structure. temporarily in rear position with respect to said casing; and means for)- controlling said catch,- ⁇ fo
US202545A 1938-02-11 1938-04-16 Automatic firearm Expired - Lifetime US2159126A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE211954X 1938-02-11

Publications (1)

Publication Number Publication Date
US2159126A true US2159126A (en) 1939-05-23

Family

ID=3865952

Family Applications (1)

Application Number Title Priority Date Filing Date
US202545A Expired - Lifetime US2159126A (en) 1938-02-11 1938-04-16 Automatic firearm

Country Status (5)

Country Link
US (1) US2159126A (xx)
BE (1) BE426318A (xx)
CH (1) CH211954A (xx)
FR (1) FR850190A (xx)
GB (1) GB515246A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575411A (en) * 1946-10-09 1951-11-20 United Shoe Machinery Corp Firing mechanism for use with a gun synchronizer
US3051056A (en) * 1958-06-23 1962-08-28 Brevets Aero Mecaniques Automatic gun breech block control mechanism
US4056038A (en) * 1976-05-12 1977-11-01 Rath Hans M Dual purpose semi-automatic convertible rifle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575411A (en) * 1946-10-09 1951-11-20 United Shoe Machinery Corp Firing mechanism for use with a gun synchronizer
US3051056A (en) * 1958-06-23 1962-08-28 Brevets Aero Mecaniques Automatic gun breech block control mechanism
US4056038A (en) * 1976-05-12 1977-11-01 Rath Hans M Dual purpose semi-automatic convertible rifle

Also Published As

Publication number Publication date
BE426318A (xx)
CH211954A (fr) 1940-10-31
GB515246A (en) 1939-11-30
FR850190A (fr) 1939-12-09

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