US2818785A - Improvements in automatic guns having a detachable barrel - Google Patents

Improvements in automatic guns having a detachable barrel Download PDF

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Publication number
US2818785A
US2818785A US445099A US44509954A US2818785A US 2818785 A US2818785 A US 2818785A US 445099 A US445099 A US 445099A US 44509954 A US44509954 A US 44509954A US 2818785 A US2818785 A US 2818785A
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US
United States
Prior art keywords
barrel
breech
gases
gun
cylinder
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
US445099A
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English (en)
Inventor
Maillard Bernard
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.)
Brevets Aero Mecaniques SA
Original Assignee
Brevets Aero Mecaniques SA
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
Application filed by Brevets Aero Mecaniques SA filed Critical Brevets Aero Mecaniques SA
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Publication of US2818785A publication Critical patent/US2818785A/en
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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
    • 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
    • F41A5/22—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated having two or more gas pistons

Definitions

  • the Ychief object of my invent-ion is to'provi'de a-.gun of this "type which is 'better adapted ⁇ to meet the r-lrequifrements of practice, in particular concerning the'transmission vof the gases ⁇ tapped from the barrel to the vmechanism providedin the breech case.
  • Fig. l is -a--seetional vviewtanthe lline fImI'o'f '1Fig. 3 of a gun made accordingto-myfinvention.
  • Fig. 2 is a sectional view on the linefIIflII of Fig. 3.
  • fy lirive'r'ition will be describedas applied to anatit matic g'un *(ffor instance -of acalibF-rahging from 20 'to 50 mm.) including, to keep its breech-block temporarily in locked position, a movable system controlled, every time a shot is fired, by powder gases tapped from the barrel of the gun.
  • the gun includes a barrel 1 fixed at the rear thereof in a detachable manner to a breech case 2 in which is slidable a breech-block 3 adapted to reciprocate in a direction parallel to the axis of the barrel.
  • Breech-block 3 is provided with a locking member 4 adapted to bear, once said breech-block has reached its front position, against an abutment piece 5 rigid with breech case 2.
  • sliding side bars 6 disposed on either 2,818,785 Patented Jan. 7, 19 58 ICC 2 side of breech-block 3 vand arranged to bring-member "4 into active position and then to hold it in said lposition during Ithe-complementary forward movement performed by said sliding members 6 after the breech-block 3 has reached its front end position.
  • Sliding bars 6 are Vsubjected to the ⁇ actionof twosprings 29. It is under the combined actionsof springs ⁇ 7 and-.29 that the sliding bams perform their supplementary frontward displacement during lwhich the Amember 4 is :held in active position and the shot is iired bythe firing .pin.v
  • Barrel 1V is detachably fixed to breech case ⁇ 2 by means of screw-threads 11 formed in the rearportion 12'of ⁇ the barrel engaged in a cylindrical sleeve 13 provided at "the frontof the breech case.
  • Barrel 1g is vprovided with a tap hole '14 opening under a ⁇ jacket 15 which surrounds the barrel ahead of tfhefportion Y12 thereof, this jacket having its rea-r edge at :16.
  • I provide in the rear portion of jacket 15, two cylindrical bores 17 having their axes 'parallel to the ⁇ barrel axis and opening rearwardly-in edge 16, thesebores having 'for instance a diameter 'averaging 8 mm. 4for a barrel of a caliber of 20 mm., and b'eing'of a length of about 30mm.
  • the outer wall of the tube is Lprovided with at least one groove extending rearwardly as far as 4the transverse plane of the 4front 'ends of bores 17'and; jacket 15 -is provided with passages connecting the 'rea'r'endof said :groove ⁇ with .the front -ends of cylindrical bores 17.
  • the inner surface of jacket 15 maybe milled at 18 so as yto provide a connection between'the inner ⁇ surfaceof said jacket yand the insideof lbores 717.
  • cylinders 4Cl-7 arefd-isposed soth'at their.
  • the front portion of breech case 2 is provided with two bores or cylindrical housings 23 disposed in such manner that When the barrel and the breech case are assembled together, these Icylindrical housings 23, which open toward the front, are respectively :coaxial with the cylinders 17 of jacket 15.
  • Each of these cylinders 23 is closed at the front end thereof by a plug 24 provided with an axial passage 25.
  • a piston 26 is slidable in cylindrical housing 23.
  • a push-piece 27 (already above referred to) is mounted 3 in the portion of the breech case at the rear of cylindrical housings 23 and this push-piece cooperates through its front end with piston 26 and through its rear end with the front edge of the correspon-ding'sli'din'g bar 6.V
  • the breech-block is then released and can therefore reciprocate.
  • the sliding bars When it comes back to its front end position, the sliding bars have a complementary forward stroke as above described and act upon the rear ends of push-pieces 27, which are thrown frontwardly.
  • the elements of the breech mechanism are then back in their initial positions and the same cycle again takes place due to the fact that when the sliding bars reach their front end position a new shot is being red.
  • means are provided to prevent, during the taking to pieces of the gun, pistons 21 and possibly plugs 24, from dropping from their respective housings.
  • Concerning pistons 21, such means must of :course enable the pistons to have the slight axial displacement that is necessary to apply them against plugs 24.
  • Said means may simply consist of a split ring 28 tending to expand outwardly, inserted in a peripheral groove of each piston and elastically applied against the inner wall of cylinder 17.
  • section of passages 25 will have no influence upon the rate of re if ⁇ these passages are of a cross section or area substantially greater than that of passages 22.
  • An automatic gun which-comprises, in combination,
  • a breech case a barrel detachably fixed to said breech case, said breech case being provided with at least one cylindrical housing for receiving gases tapped from said barrel, one end wall of said housing being provided with a passage extending therethrough, a cylinder carried by said barrel having one end thereof located opposite the outer face of said housing end wall when said barrel is fixed on said breech case, said barrel being provided with at least one tap conduit connecting the bore thereof with the other end of said cylinder, and a piston in said cylinder provided with a longitudinal passage extending therethrough, this passage being in line with said first mentioned passage', the outer end of said piston being shaped to t against the outer ⁇ face of said housing end wall when the powder gases escaping from the bore of said barrel through said tap vconduit push said piston against said end wall, whereby said two passages are connected together end to end with a gas-tight t when said gases are to flow therethrough.
  • An automatic gun which comprises, in combination, a breech case, a barrel detachably xed to said breech case, said breech case being provided with at least one cylindrical housing parallel to said barrel for receiving gases tapped from saidA barrel, the front end wall of said housing being provided with a passage extending therethrough, a :cylinder parallel to said barrel and icarried by it having the rear endthereof located opposite the outer face of said housing front end wall when said barrel is xed on said breech case, said barrel being provided with at least one tap conduit connecting the bore thereof With the front end of said cylinder, and a piston in said cylinder provided with a longitudinal passage extending therethrough, this passage being in line with said rst mentioned passage, the outer end of said piston projecting rearwardly from lsaid cylinder and being shaped to t against the outer face of said housing front end wall when the powder gases escaping from the bore of said barrel through said tap conduit push said piston against said end Wall, whereby said two passages are connected together end to end
  • Av gun according to claim 2 in which said tap conduit includes, in said barrel, a longitudinal groove and an oblique groove extending between the front end of said cylinder and a point of said longitudinal groove ahead of the rear end thereof, said gun including a sleeve surrounding the yportion of said barrel including said grooves so as to close them.
  • a gun according to claim 2 further including means for preventing said piston from dropping from said cylinder Whilefleaving it free to move to a limited degree therein.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US445099A 1953-07-27 1954-07-22 Improvements in automatic guns having a detachable barrel Expired - Lifetime US2818785A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU321923X 1953-07-27

Publications (1)

Publication Number Publication Date
US2818785A true US2818785A (en) 1958-01-07

Family

ID=19732564

Family Applications (1)

Application Number Title Priority Date Filing Date
US445099A Expired - Lifetime US2818785A (en) 1953-07-27 1954-07-22 Improvements in automatic guns having a detachable barrel

Country Status (8)

Country Link
US (1) US2818785A (fr)
BE (1) BE529919A (fr)
CH (1) CH321923A (fr)
DE (1) DE1022126B (fr)
FR (1) FR1105406A (fr)
GB (1) GB754284A (fr)
LU (1) LU32298A1 (fr)
NL (2) NL189105B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333509A (en) * 1964-10-20 1967-08-01 Oerlikon Buhrle Holding A G Obturating piston for an automatic weapon with a gas-bleed passage
US3359860A (en) * 1964-11-19 1967-12-26 Oerlikon Buhrle Holding A G Gas operated automatic firearm having a barrel with a gas conducting insert
US4102242A (en) * 1975-08-04 1978-07-25 O. F. Mossberg & Sons, Inc. Autoloading gas-operated firearm
WO2014139905A1 (fr) * 2013-03-11 2014-09-18 Rheinmetall Waffe Munition Gmbh Montage d'un piston à gaz dans un système d'arme

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE567635A (fr) * 1957-05-24
DE2809505C2 (de) * 1978-03-06 1982-10-07 Rheinmetall GmbH, 4000 Düsseldorf Gurtzuführerantrieb für eine automatische Gasdrucklader-Rohrwaffe, insbesondere Maschinenkanone
DE19903610A1 (de) * 1999-01-29 2000-08-31 Heckler & Koch Gmbh Antriebssystem für einen Gasdrucklader

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2341005A (en) * 1941-10-31 1944-02-08 Western Cartridge Co Piston means for gas-operated firearms
US2388396A (en) * 1942-09-12 1945-11-06 J C Ljungman Ab Firearm
US2554618A (en) * 1946-12-16 1951-05-29 Paul H Dixon Gas piston for operating automatic gun breech locks
US2577026A (en) * 1946-01-16 1951-12-04 Brevets Aero Mecaniques Pivoted breech bolt lock for automatic firearms

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR959892A (fr) * 1950-04-06
NL136930B (fr) * 1944-10-27
CH239033A (de) * 1946-02-23 1945-09-15 Sig Schweiz Industrieges Gasdrucklader.
FR961368A (fr) * 1947-03-08 1950-05-11
FR1012202A (fr) * 1949-07-01 1952-07-07 Anciens Ets Hotchkiss & Cie Perfectionnements aux armes automatiques à prise de gaz

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2341005A (en) * 1941-10-31 1944-02-08 Western Cartridge Co Piston means for gas-operated firearms
US2388396A (en) * 1942-09-12 1945-11-06 J C Ljungman Ab Firearm
US2577026A (en) * 1946-01-16 1951-12-04 Brevets Aero Mecaniques Pivoted breech bolt lock for automatic firearms
US2554618A (en) * 1946-12-16 1951-05-29 Paul H Dixon Gas piston for operating automatic gun breech locks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333509A (en) * 1964-10-20 1967-08-01 Oerlikon Buhrle Holding A G Obturating piston for an automatic weapon with a gas-bleed passage
US3359860A (en) * 1964-11-19 1967-12-26 Oerlikon Buhrle Holding A G Gas operated automatic firearm having a barrel with a gas conducting insert
US4102242A (en) * 1975-08-04 1978-07-25 O. F. Mossberg & Sons, Inc. Autoloading gas-operated firearm
WO2014139905A1 (fr) * 2013-03-11 2014-09-18 Rheinmetall Waffe Munition Gmbh Montage d'un piston à gaz dans un système d'arme

Also Published As

Publication number Publication date
NL94793C (fr)
DE1022126B (de) 1958-01-02
CH321923A (fr) 1957-05-31
GB754284A (en) 1956-08-08
LU32298A1 (fr)
FR1105406A (fr) 1955-12-02
NL189105B (nl)
BE529919A (fr)

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