US1427079A - Crank-operating gear for moving the breech in machine guns - Google Patents

Crank-operating gear for moving the breech in machine guns Download PDF

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Publication number
US1427079A
US1427079A US407539A US40753920A US1427079A US 1427079 A US1427079 A US 1427079A US 407539 A US407539 A US 407539A US 40753920 A US40753920 A US 40753920A US 1427079 A US1427079 A US 1427079A
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US
United States
Prior art keywords
crank
breech
breech block
moving
machine guns
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
US407539A
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English (en)
Inventor
Fokker Anthony Herman Gerard
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1427079A publication Critical patent/US1427079A/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
    • F41A3/50—Toggle-joint locks, e.g. crank-operated

Definitions

  • the object of the present invention is to provide a means of bringing the breech block into its forward position before the operating crank has reached the end of its throw in order to utilize the remainder of that throw for operating a device for locking the breech block in position before the shot is fired.
  • This means of locking forms the subject of my copending apglication for Letters Patent of the United tates, Serial No. 407,540, filed September 1, 1920.
  • FIGs. 1 and 2 respectively show vertical and horizontal sections through the gun mechanism.
  • Fig. 3 is a cross section through A-B Fig. 1.
  • the operatin crank A is connected to the breech block E by means of a connecting rod, which. however, consists of two telescoping parts and C, one of which slides axially inside the other, the two parts being extended as far as allowed by the crank A and the breech block E by means of a spring D.
  • the continued rotation of the crank A first unlocks the breech block by moving the locking levers K, duringwhich time the breech block remains statlonary while the two parts of the connectmgrod slide outwards, decompressng the spring D.
  • the connecting rod 1s fully extended the further rotation of the crank draws the breech block away from the abutment and the cycle of operations is repeated by the means described.
  • the rotation of the operating crank remains continuous and uniform throughout the cycle of operations.
  • a rotating crank In a breech block mechanism for machine guns, a rotating crank, a connectin rod connecting the operating crank with the breech block, divided into two parts, one sliding axially within the other, and a spring holding the two parts extended as far as allowed by the relative positions of the crank and the breech block.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Transmission Devices (AREA)
US407539A 1918-02-13 1920-09-01 Crank-operating gear for moving the breech in machine guns Expired - Lifetime US1427079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE310067T 1918-02-13

Publications (1)

Publication Number Publication Date
US1427079A true US1427079A (en) 1922-08-22

Family

ID=23612502

Family Applications (1)

Application Number Title Priority Date Filing Date
US407539A Expired - Lifetime US1427079A (en) 1918-02-13 1920-09-01 Crank-operating gear for moving the breech in machine guns

Country Status (4)

Country Link
US (1) US1427079A (enrdf_load_stackoverflow)
DE (1) DE310067C (enrdf_load_stackoverflow)
FR (1) FR505219A (enrdf_load_stackoverflow)
GB (1) GB136822A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645165A (en) * 1970-10-20 1972-02-29 Us Army Firing mechanism for a machinegun

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645165A (en) * 1970-10-20 1972-02-29 Us Army Firing mechanism for a machinegun

Also Published As

Publication number Publication date
GB136822A (en)
FR505219A (fr) 1920-07-26
DE310067C (enrdf_load_stackoverflow)

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