US2590981A - Pivoted breech closure and lock member - Google Patents

Pivoted breech closure and lock member Download PDF

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Publication number
US2590981A
US2590981A US33356A US3335648A US2590981A US 2590981 A US2590981 A US 2590981A US 33356 A US33356 A US 33356A US 3335648 A US3335648 A US 3335648A US 2590981 A US2590981 A US 2590981A
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US
United States
Prior art keywords
bolts
accumulators
cartridge
fore
portions
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
US33356A
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English (en)
Inventor
Lippert Hanns
Hepperle Erwin
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.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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
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Application filed by Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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Publication of US2590981A publication Critical patent/US2590981A/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
    • 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
    • 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

Definitions

  • the present invention relates therefore to an entirely new method and discloses an automatic weapon whose breech system is constructed in an entirely new manner.
  • the new breech system eliminates all the difiiculties enumerated above and makes it possible in firearms manufacture to automatize the heaviest calibres and to raise the rate of fire to the highest figures conceivable.
  • the automatic firearm in accordance with the present invention is characterized by at least one bolt bearing against the casing of the firearm and mounted pivotally in such fashion that, in order to absorb the forces generated by gas pressure, it engages immediately behind a projecting cap provided on the cartridge case.
  • breech block hitherto customary merely retains, therefore, the function of a cartridge slide. and can therefore be constructed so as to be extremely light, taking for instance the form of a sheetmetal sleeve.
  • a particularly advantageous construction is achieved when at least two bolts, bearing against the firearm casing and capable of being pivoted behind a conical projection provided on the cartridge case, are provided, which are brought into the cartridge-locking position-by a power accumulator placed under tension by the cartridge slide in its forward course.
  • a breech system of Only bolts bearing against the weapon this kind is, as will be shown, extremely simple in its construction and sets no limits either to the calibre or to the rate of fire, at least from a constructional point of view.
  • FIG. 1 to 5 illustrate a typical embodiment of the invention
  • Fig. 1 is a section through an automatic firearm, drawn diagrammatically;
  • Fig. 2 is an enlarged section through the locking mechanism during the insertion of a cartridge
  • Fig. 3 shows the subject of Fig. 2 in the position in which the cartridge is locked
  • Fig. 4 is a section along the line II in Fig. 3;
  • Fig. 5 is an elevation of a cartridge-case especially designed for use in the firearm illustrated.
  • I is the barrel, which is inserted in the firearm casing 3 in the known manner by means of a bayonet joint 2. .
  • the reciprocally moving cartridge slide 4 is acted upon by a recuperating spring 5 andis provided in its fore portion with the percussion mechanism 6, as seen in Figs. 2 and 3.
  • the two bolts I and 8 are mounted in bowl-shaped recesses 9 and I ll in the ⁇ firearm casing 3.
  • the bolts 1 and 8 are operated by power accumulators, consisting of the rear portions II and I2 and the fore portions I3 and I4.
  • the two power accumulators are operatively connected through the springs I5 and I6.
  • the rear accumulator portions II and I2 are of forked shape and guided along the fore portions I3 and I4 of the accumulators.
  • plates 40 and M capable of being slidingly inserted inthe firearm casing, are provided, which form a seal when the bolts and the accumulators have been inserted.
  • the manner in which the automatic firearm illustrated functions is as follows:
  • the cartridge slide 4 feeds, at each cycle, a cartridge into the cartridge chamber and in the course of that operation, shortly before the cartridge has been completely inserted into the chamber, strikes with its noses 21 against the rear portions II and 12 of the accumulators.
  • the ejection of the cartridge can take place, for instance, in a downward direction (cf. Fig. 4).
  • an automatic firearm in combination with a percussion mechanism for inserting a cartridge case into a firing position, two swingable bolts located on opposite sides of said percussion mechanism and two movable accumulators hav ing bosses engaging said bolts and swinging them inwardly from an unlocked position to a locking position, and vice versa, said bolts engaging said percussion mechanism and the rear end of the cartridge case in said locking position, said accumulators having rearwardly directed projections and said bolts having noses engaging behind, said projections in the unlocked position of said bolts.
  • an automatic firearm in combination with'a percussion mechanism for inserting a cartridge case into a firing position, said percussion mechanism including a cartridge slide, said cartridge case having a rear conical projection, two swingable bolts located on opposite sides of said percussion mechanism, two movable accumulators having bosses engaging said bolts, and springs engaging said accumulators, said cartridge slide engaging said accumulators and moving them forwardly while tensionin said springs, said bc'isses of the accumulators swinging said bolts from an unlocked position to a locked position when said accumulators are moved forwardly, said bolts engaging said percussion mechanism and said rear conical projection of the cartridge case in said locking position, said accumulators having rearwardly directed projections and said bolts having noses engaging behind said projections in the unlocked position of said bolts.
  • an automatic firearm in combination with a percussion mechanism for insertin a cartridge case into a firing position, two swingable bolts located on opposite sides of said percussion mechanism, two movable accumulators, each of said accumulators having a fore portion and a rear portion, and separate springs interconnecting the fore and rear portions of each accumulator, the rear portion of each accumulator being forked and adapted to move relatively to its fore portion, the fore portions of said accumulators having bosses engaging said bolts and swinging them inwardly from an unlocked position to a locking position, and vice versa, said bolts engaging said percussion mechanism and the rear end of the cartridge case in said locking position, said fore portions having rearwardly directed projections and said bolts having noses engaging behind said projections in the unlocked position of said bolts.
  • an automatic firearm in combination with a percussion mechanism for inserting a cartridge case into a firing position, two swingable bolts located on opposite sides of said percussion mechanism, two movable accumulators, each of said accumulators having a fore portion and a rear portion, and separate springs interconnecting the fore and rear portions of each accumulator, the rear portion of each accumulator being forked and adapted to move relatively to its fore portion, the fore portions of said accumulators having bosses extending into recesses formed in said 35 bolts in an unlocked position of said bolts, said bosses moving out of said recesses and swinging said bolts into a locking position during a forward movement of said accumulators, said bolts engaging said percussion mechanism and the rear end of the cartridge case and said bosses wedging said bolts in said IOCking position, said fore portions having rearwardly directed projections and said bolts having noses engaging behind said projections in the unlocked position of said bolts.
  • an automatic firearm in combination with a percussion mechanism for inserting a cartridge case into a firing position, two swingable bolts located on op osite sides of said percussion mechanism, two movable accumulators, each of said accumulators having a fore portion and a rear portion, separate springs interconnecting the fore and rear portions of each accumulator, separate pistons connected to the fore portions of said accumulators, and means transmitting gas pressure after firing to said pistons to cause said pistons and said fore portions to move rearwardly, said fore portions having bosses engaging said bolts and swinging them inwardly from an unlocked position to a lockin position during a forward movement of said fore portions, said fore portions further having rearwardly directed projections and said bolts having noses engaging behind said projections in the unlocked position of said bolts.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US33356A 1947-06-20 1948-06-16 Pivoted breech closure and lock member Expired - Lifetime US2590981A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH653693X 1947-06-20

Publications (1)

Publication Number Publication Date
US2590981A true US2590981A (en) 1952-04-01

Family

ID=4526323

Family Applications (1)

Application Number Title Priority Date Filing Date
US33356A Expired - Lifetime US2590981A (en) 1947-06-20 1948-06-16 Pivoted breech closure and lock member

Country Status (5)

Country Link
US (1) US2590981A (de)
CH (1) CH267987A (de)
DE (1) DE844561C (de)
FR (1) FR968103A (de)
GB (1) GB653693A (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756640A (en) * 1950-03-30 1956-07-31 Brev Aero Mecaniques S A Soc Breech block locking means
US2775166A (en) * 1951-08-22 1956-12-25 Mini Of Supply Pivoted breech bolt lock for gas piston firearms
US2789479A (en) * 1952-11-08 1957-04-23 Mccoll Alexander Stone Bolt lock and retracting mechanism for gas operated machine gun
US2824400A (en) * 1955-01-19 1958-02-25 Remington Arms Co Inc Rockable breech bolt locking block
US2831287A (en) * 1954-02-16 1958-04-22 Brevets Aero Mecaniques Cartridge chamber with abutments
US2831403A (en) * 1950-03-30 1958-04-22 Brev Aero Mecaniques S A Soc Sliding breechblock locking mechanism for self-loading firearms
US2839966A (en) * 1955-08-18 1958-06-24 John G Lord Split breech block
US2866387A (en) * 1957-01-11 1958-12-30 Rudolph E Stern Breech block mechanism
US2868082A (en) * 1955-10-13 1959-01-13 Robert G Nutting Drop lock bolt for gun
US5722383A (en) * 1995-12-01 1998-03-03 Tippmann Pneumatics, Inc. Impeder for a gun firing mechanism with ammunition feeder and mode selector
US6467473B1 (en) 1999-02-26 2002-10-22 Airgun Designs, Inc. Paintball feeders
US6488019B2 (en) 1999-02-26 2002-12-03 Thomas G. Kotsiopoulos Feeder for a paintball gun
US6609511B2 (en) 1999-02-26 2003-08-26 Airgun Designs, Inc. Conveyor feed apparatus for a paintball gun
US20040069138A1 (en) * 2002-06-07 2004-04-15 Jebsen Jan Henrik Heavy caliber firearm with enhanced recoil and control characteristics
US20080236380A1 (en) * 2005-03-16 2008-10-02 Jozsef Toth Firearm with a Pressure Accumulator
US20090308241A1 (en) * 2008-06-11 2009-12-17 Blaser Finanzholding Gmbh Breech for a repeating rifle and receiver for such a breech
US9546840B1 (en) * 2015-01-14 2017-01-17 The United States Of America As Represented By The Secretary Of The Army Bi-directional recoil containment and double strike prevention system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1387460A (en) * 1918-12-11 1921-08-16 William J Wilkinson Block-action for repeating arms
FR785581A (fr) * 1934-05-04 1935-08-13 Glaenzer Spicer Soc Joint universel double

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1387460A (en) * 1918-12-11 1921-08-16 William J Wilkinson Block-action for repeating arms
FR785581A (fr) * 1934-05-04 1935-08-13 Glaenzer Spicer Soc Joint universel double

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756640A (en) * 1950-03-30 1956-07-31 Brev Aero Mecaniques S A Soc Breech block locking means
US2831403A (en) * 1950-03-30 1958-04-22 Brev Aero Mecaniques S A Soc Sliding breechblock locking mechanism for self-loading firearms
US2775166A (en) * 1951-08-22 1956-12-25 Mini Of Supply Pivoted breech bolt lock for gas piston firearms
US2789479A (en) * 1952-11-08 1957-04-23 Mccoll Alexander Stone Bolt lock and retracting mechanism for gas operated machine gun
US2831287A (en) * 1954-02-16 1958-04-22 Brevets Aero Mecaniques Cartridge chamber with abutments
US2824400A (en) * 1955-01-19 1958-02-25 Remington Arms Co Inc Rockable breech bolt locking block
US2839966A (en) * 1955-08-18 1958-06-24 John G Lord Split breech block
US2868082A (en) * 1955-10-13 1959-01-13 Robert G Nutting Drop lock bolt for gun
US2866387A (en) * 1957-01-11 1958-12-30 Rudolph E Stern Breech block mechanism
US5722383A (en) * 1995-12-01 1998-03-03 Tippmann Pneumatics, Inc. Impeder for a gun firing mechanism with ammunition feeder and mode selector
US6467473B1 (en) 1999-02-26 2002-10-22 Airgun Designs, Inc. Paintball feeders
US6488019B2 (en) 1999-02-26 2002-12-03 Thomas G. Kotsiopoulos Feeder for a paintball gun
US6609511B2 (en) 1999-02-26 2003-08-26 Airgun Designs, Inc. Conveyor feed apparatus for a paintball gun
US20040069138A1 (en) * 2002-06-07 2004-04-15 Jebsen Jan Henrik Heavy caliber firearm with enhanced recoil and control characteristics
US7698987B2 (en) * 2002-06-07 2010-04-20 Gamma Kdg Systems Sa Heavy caliber firearm with enhanced recoil and control characteristics
US20100258001A1 (en) * 2002-06-07 2010-10-14 Jan Henrik Jebsen Heavy Caliber Firearm with Enhanced Recoil and Control Characteristics
US8272313B2 (en) 2002-06-07 2012-09-25 Kriss Systems Sa Heavy caliber firearm with enhanced recoil and control characteristics
US20080236380A1 (en) * 2005-03-16 2008-10-02 Jozsef Toth Firearm with a Pressure Accumulator
US20090308241A1 (en) * 2008-06-11 2009-12-17 Blaser Finanzholding Gmbh Breech for a repeating rifle and receiver for such a breech
US8091466B2 (en) * 2008-06-11 2012-01-10 Blaser Finanzholding Gmbh Breech portion for a repeating rifle
US9546840B1 (en) * 2015-01-14 2017-01-17 The United States Of America As Represented By The Secretary Of The Army Bi-directional recoil containment and double strike prevention system

Also Published As

Publication number Publication date
CH267987A (de) 1950-04-30
DE844561C (de) 1952-07-21
FR968103A (fr) 1950-11-20
GB653693A (en) 1951-05-23

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