US2356595A - Breech device for firearms - Google Patents

Breech device for firearms Download PDF

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Publication number
US2356595A
US2356595A US382429A US38242941A US2356595A US 2356595 A US2356595 A US 2356595A US 382429 A US382429 A US 382429A US 38242941 A US38242941 A US 38242941A US 2356595 A US2356595 A US 2356595A
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US
United States
Prior art keywords
breech
block
breech block
casing
firearms
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
US382429A
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English (en)
Inventor
Koucky Josef
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Individual
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Individual
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Filing date
Publication date
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Publication of US2356595A publication Critical patent/US2356595A/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
    • F41A3/14—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
    • F41A3/16—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks
    • 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
    • F41A3/14—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
    • F41A3/16—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks
    • F41A3/26—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable 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
    • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
    • F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated

Definitions

  • the present invention relates to a breech device for iirearms especially for those of smaller caliber, whether it be a repeater, an automatic or semi-automatic rearm.
  • the present invention relates to a breech device for such firearms in which projectiles of a, greater force of percus' sion, that is, cartridges developing a greater initial pressure and having a higher speed of ring are used.
  • a breech device characterised by a breech block forming a body having flat sides and tiltable around the longitudinal axis of the rearm and provided with locking lugs which engage in notches in the casing of the firearm.
  • the breech block forms an appropriate quadri-lateral prism the base of which has a greater length than height and which is chamfered along a shorter length than the length of the body on the opposite parallel side-walls by parallel planes.
  • FIG. 1 shows the arrangement in the case of a hand operated firearm, which in Fig. 1 shows the longitudinal section of the breech block closed.
  • Fig. 2 is a perspective View of the breech casing with the breech block open.
  • Figs. 3 and 4 are transverse sections of the iirearm following the lines I-III and IV-IV of Fig. 1.
  • FIG. 5 Another example of the arrangement of the breech device in an automatic gas operated firearm is perspectively shown in Fig. 5.
  • the irearm shown in Figs. 1 to 4 consists essentially of the barrel l, which is xed to the casing 2 of the breech by means of a screw thread; 3 is the front part of the stock, 4 is the upper part of the stock.
  • the trigger mechanism 8 is of a known construction and sets the hammer 9 in action.
  • On the rear part of the casing 2 is fixed the butt l0.
  • the casing 2 of the breech moves 65 theV breech block Il' with the striker l2 charged with a spring i2' and the ejector I3.
  • the breech block Il has the shape of a flat slab with its bottom and top faces chamfered or beveled at
  • the bevels extend from the rear end of the block forward a distance equal to the length of the arrow L in Fig.y 2.
  • the angle of bevel is indicated by a which is preferably from 15 to 30.
  • the forward end of the block is unbeveled and forms locking lugs i5, I5 adapted to be received in recesses Il, Il', respectively in the bottom and top wall of the case 2.
  • the remaining portions of the top, bottom, and side wall of the casing form planes for guiding the ⁇ breech block in executing the movement by whichy the breech block passes into the closed or open position.
  • the lugs I5, l5' have diagonal locking faces l'6, IS which engage rear end walls of the recesses Il, Il', respectively, when the block is tiltedr through the angle a into locked position.
  • the lug l5* bears the bolt lever I8, which passes through a longitudinal slot in the casing 2 of the breech device, which ends in the locked posit-ion in a transverse slot 2B, enabling the transverse motion of the bolt lever when locking the breech block.
  • the breech block may also be used in automatic rearms as may be seen in Fig. 5 in which is shown a perspective view and a fragmentary section of a gas operated firearm.
  • the firearm shown in the drawing consists of the barrel I, the casing 2' for the breech, in which the breech block II, which isconstructed in quite the same manner as that in the preceding case, is movably located.
  • the breech block is again chamfered at the two opposite edges Where the chamferings I4, I4 begin also at approximately a central longitudinal vertical plane through the prismatic body of the breech block.
  • a stud 22 fixed on the locking lug I5 which engages into the slot 23 at the end of the piston rod 24, whilst the piston 25 of the piston rod reaches into the gas cylinder 26 and is guided in a known manner in the casing 2 of the breech device.
  • the gas cylinder is tightly fixed to the barrel by means of a sleeve 21.
  • the forward movement of the breech device is assured by the buffer spring 28.
  • the governing groove is chosen so that at the first shock of the gases on the piston the breech block remains still closed during a certain time and only when the piston 25 after having travelled through a certain distance leaves the gas chamber, it is when the projectile has left the barrel, through the effect of the curved part of the slot 23 a, swinging of the breech block II around the locking angle a takes place.
  • the piston rod 24 brings the breech block I I into the rear end position.
  • a handle 29 is formed on the piston rod.
  • a breech block device a casing, a breech block slidable in said casing and'guided'by walls thereof, said block having opposite flat sides each formed with a bevel extending along part of the length of the side and extending outwardly from a line located approximately centrally of its width, the unbeveled portions beyond the ends of the bevel forming locking lugs and said casing being formed with recesses adapted respectively to receive said lugs and means for turning said block from an unlocked position in which the unbeveled portions of said sides are in guiding contact with said Walls to a locked position in which said lugs are received in said recesses.
  • a breech block device according to claim 1 wherein, the block is in the form of a flat slab with top and bottom faces beveled and of greater area than the remainingV faces of the block and wherein the bevels extend forward from the rear endof the block and the lugs are located at the front end.
  • a breech block. device wherein the block is in a form of a flat slab with top and bottom faces beveled and of greater area than the rear faces of the block, and wherein the bevels extend forwardly from the rear end of the block and the lugs are located at the front end, and wherein the lugs have flat rear faces and the recesses flat rear walls, and wherein, in locked position said faces and walls are in facial contact.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US382429A 1939-12-22 1941-03-08 Breech device for firearms Expired - Lifetime US2356595A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS615846X 1939-12-22
DE2485155X 1943-12-11

Publications (1)

Publication Number Publication Date
US2356595A true US2356595A (en) 1944-08-22

Family

ID=32231740

Family Applications (2)

Application Number Title Priority Date Filing Date
US382429A Expired - Lifetime US2356595A (en) 1939-12-22 1941-03-08 Breech device for firearms
US763363A Expired - Lifetime US2485155A (en) 1939-12-22 1947-07-24 Breechblock device for firearms

Family Applications After (1)

Application Number Title Priority Date Filing Date
US763363A Expired - Lifetime US2485155A (en) 1939-12-22 1947-07-24 Breechblock device for firearms

Country Status (5)

Country Link
US (2) US2356595A (fr)
BE (2) BE440105A (fr)
FR (1) FR893466A (fr)
GB (1) GB615846A (fr)
NL (1) NL60725C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538048A (en) * 1948-11-10 1951-01-16 Wilbur A Schaich Operating slide for firearms
US2606382A (en) * 1948-11-29 1952-08-12 Wilbur A Schaich Two-piece firearm bolt
US3024531A (en) * 1955-05-10 1962-03-13 Remington Arms Co Inc Cartridge-powered piston type tool
US3955470A (en) * 1973-09-13 1976-05-11 Kruzell George R Bolt operating and locking mechanism for closed breech rocket gun
US20140311005A1 (en) * 2013-03-15 2014-10-23 Saeilo Enterprises, Inc. Straight pull bolt action system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648153A (en) * 1945-02-09 1953-08-11 Allen A Dicke Operating lever means for breech closing mechanisms
US2688203A (en) * 1950-02-01 1954-09-07 Alonzo F Gaidos Folding light automatic rifle
US2881547A (en) * 1955-07-29 1959-04-14 Olin Mathieson Multi-part breech bolt mechanism
US20140260943A1 (en) * 2013-03-18 2014-09-18 Sarsilmaz Silah Sanayi A.S. Submachine gun

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1096324A (en) * 1913-12-15 1914-05-12 Hans Stamm Automatic-loading firearm.
US1228827A (en) * 1916-08-08 1917-06-05 Maxim Munitions Corp Recoil-operated firearm.
US2035539A (en) * 1932-11-30 1936-03-31 Remington Arms Co Inc Repeating firearm
US2125571A (en) * 1935-01-10 1938-08-02 Ernest F Jacobson Gun
US2424264A (en) * 1942-10-27 1947-07-22 Gerald A Yorks Composite bolt structure for semiautomatic rifles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538048A (en) * 1948-11-10 1951-01-16 Wilbur A Schaich Operating slide for firearms
US2606382A (en) * 1948-11-29 1952-08-12 Wilbur A Schaich Two-piece firearm bolt
US3024531A (en) * 1955-05-10 1962-03-13 Remington Arms Co Inc Cartridge-powered piston type tool
US3955470A (en) * 1973-09-13 1976-05-11 Kruzell George R Bolt operating and locking mechanism for closed breech rocket gun
US20140311005A1 (en) * 2013-03-15 2014-10-23 Saeilo Enterprises, Inc. Straight pull bolt action system
US9115941B2 (en) * 2013-03-15 2015-08-25 Saeilo Enterprises, Inc. Straight pull bolt action system

Also Published As

Publication number Publication date
US2485155A (en) 1949-10-18
FR893466A (fr) 1944-07-28
GB615846A (en) 1949-01-12
BE466192A (fr)
NL60725C (fr)
BE440105A (fr)

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