US2223671A - Gas operated automatic firearm - Google Patents

Gas operated automatic firearm Download PDF

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Publication number
US2223671A
US2223671A US203146A US20314638A US2223671A US 2223671 A US2223671 A US 2223671A US 203146 A US203146 A US 203146A US 20314638 A US20314638 A US 20314638A US 2223671 A US2223671 A US 2223671A
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US
United States
Prior art keywords
cylinder
barrel
gas
channel
piston
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
US203146A
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English (en)
Inventor
Brondby Fridtjof Nielsen
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Individual
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Individual
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Filing date
Publication date
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Publication of US2223671A publication Critical patent/US2223671A/en
Anticipated expiration legal-status Critical
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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
    • F41A5/26—Arrangements or systems for bleeding the gas from the barrel

Definitions

  • the presentinvention has for its'purpose 'to remove thisdrawbackin automa-tic and semiautomatic firearms of -the'- gas-reloading" type, wherein some part of the gas isj'passed' through afchannel in the barrel intoa gas'cylinder,
  • the gas cylinder whenclosed-has a comparatively large volume, for instance as set forth in my U. S. Patent No. 2,003,066, dated May 28, 1935, according to which the volume of the cylinder is suificiently large to supply the air necessary for completing the burning of the gases entering said cylinder.
  • the channel leading from the barrel to a cylinder of aforesaid type is arranged in such manner that it makes an acute angle with the portion of the barrel located rearwardly of the point of entry of the channel in-tothe barrel.
  • FIG. 1 An embodiment of the invention is illustrated in the drawing which shows theforemost portion of a firearm'barrel.
  • the barrel I somewhat behind the muzzle is provided with a bore- 2, and the bore or channel .is inclined so that its axis makes an acute angle with the barrel axis.
  • the channel or bore 2 continues in a correspondingly inclined channel 3 rearwardly to the front end of a gas cylinder 4, which has a piston at its rear end comprising a surrounding sleeve 5 having a bottom 6.
  • a bar! extends rearwardly from this piston for operating the breech mechanism (not shown).
  • the present invention is not particu- 'larly concerned with this reloading mechanism per se. constructed according to the British Patent No. 415,841.
  • the drawing shows the positionof the piston when the breech is closed as during the the the projectile has passed by the gas channel 2, 3, will flow through the latter and into the cylinder 4, until the projectile is out of the barrel.
  • the projectile requires less than of a sec- This mechanism may for instance be I,
  • the piston during this short time can have moved only a fraction of the movement required of it for opening the breech.
  • the condition existing as the projectile leaves the muzzle is that the cylinder 4 is filled with powder gas under a certain pressure. This gas presses upon the piston 5, 6 at one end of the cylinder, while at the other end of the cylinder it flows out through the gas channel 3, 2, and on account of the inclination of the channel flows further out through the firearm muzzle. This outflow of the gas takes place during the rearward motion of the piston 5, 6, until the sleeve 5 has cleared the cylinder 4 and the piston and cylinder are put into connection with the fresh air.
  • a firearm of the gas reloading type in combination a barrel, a cylinder, a breech-operating piston movable under the influence of powder gas pressure in said cylinder, said piston closing said cylinder when in closed breech position and opening said cylinder to the atmosphere when in open breech position, the volume of said cylinder when the piston is in closed breech position being about one-half the volume of the barrel, said barrel having a lateral bore, which, where it disembogues into the barrel, forms an acute angle with respect to the portion of the barrel axis in rear of the bore, and means providing a channel connecting said bore with said cylinder.
  • a firearm of the gas reloading type in combination a barrel, a cylinder, a breech-operating piston movable under the influence of powder gas pressure in said cylinder, said piston closing said cylinder when in closed breech position and opening said cylinder to the atmosphere when in open breech position, said cylinder, when in closed breech position having a large volume of the order of one-half the volume of the barrel bore sufficient to provide the air necessary for completing combustion of the gases entering thereinto from the barrel so as to reduce accumulation of soot in the cylinder, means providing a channel connecting said cylinder with said bore, said channel, where it disembogues into the bore forming an acute angle with the portion of the bore in rear of said channel so that after firing the high pressure gas in said cylinder flows through the channel into said bore and creates a forwardly directed current of air through the bore to clear the bore of powder gas to minimize deposit of soot in said barrel and channel and to cool the barrel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US203146A 1937-04-28 1938-04-20 Gas operated automatic firearm Expired - Lifetime US2223671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO501386X 1937-04-28

Publications (1)

Publication Number Publication Date
US2223671A true US2223671A (en) 1940-12-03

Family

ID=19905819

Family Applications (1)

Application Number Title Priority Date Filing Date
US203146A Expired - Lifetime US2223671A (en) 1937-04-28 1938-04-20 Gas operated automatic firearm

Country Status (4)

Country Link
US (1) US2223671A (enrdf_load_stackoverflow)
BE (1) BE427749A (enrdf_load_stackoverflow)
FR (1) FR837011A (enrdf_load_stackoverflow)
GB (1) GB501386A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6347569B1 (en) * 2000-07-24 2002-02-19 Lawrence V Butler Semi-automatic gas-operated shotgun
US20040244257A1 (en) * 2003-06-04 2004-12-09 Degerness Michael K. Composite structural member
US20100071243A1 (en) * 2008-09-23 2010-03-25 Browning Firearm having an improved firing pin locking mechanism
US20100071541A1 (en) * 2008-09-23 2010-03-25 Browning Firearm having an improved gas-operated action
US20100071242A1 (en) * 2008-09-23 2010-03-25 Browning Magazine plug
US20100071245A1 (en) * 2008-09-23 2010-03-25 Browning Firearm having an improved forearm fastening mechanism
US20100275486A1 (en) * 2008-09-23 2010-11-04 Browning Shotgun having an improved shotshell feeding mechanism
US20140182450A1 (en) * 2012-12-27 2014-07-03 John M. Boutin, JR. Gas Management System For A Firearm

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6347569B1 (en) * 2000-07-24 2002-02-19 Lawrence V Butler Semi-automatic gas-operated shotgun
US20040244257A1 (en) * 2003-06-04 2004-12-09 Degerness Michael K. Composite structural member
US6889464B2 (en) * 2003-06-04 2005-05-10 Michael K. Degerness Composite structural member
US20100071243A1 (en) * 2008-09-23 2010-03-25 Browning Firearm having an improved firing pin locking mechanism
US20100071541A1 (en) * 2008-09-23 2010-03-25 Browning Firearm having an improved gas-operated action
US20100071242A1 (en) * 2008-09-23 2010-03-25 Browning Magazine plug
US20100071245A1 (en) * 2008-09-23 2010-03-25 Browning Firearm having an improved forearm fastening mechanism
US20100275486A1 (en) * 2008-09-23 2010-11-04 Browning Shotgun having an improved shotshell feeding mechanism
US7963061B2 (en) 2008-09-23 2011-06-21 Browning Magazine plug
US8056280B2 (en) 2008-09-23 2011-11-15 Browning Firearm having an improved forearm fastening mechanism
US8079168B2 (en) 2008-09-23 2011-12-20 Browning Firearm having an improved firing pin locking mechanism
US8312656B2 (en) 2008-09-23 2012-11-20 Browning Shotgun having an improved shotshell feeding mechanism
US20140182450A1 (en) * 2012-12-27 2014-07-03 John M. Boutin, JR. Gas Management System For A Firearm
US8850951B2 (en) * 2012-12-27 2014-10-07 Holland Automatic Rifles Llc Gas management system for a firearm

Also Published As

Publication number Publication date
FR837011A (fr) 1939-02-01
GB501386A (en) 1939-02-27
BE427749A (enrdf_load_stackoverflow)

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