GB253225A - Improvements in and relating to automatic firearms - Google Patents

Improvements in and relating to automatic firearms

Info

Publication number
GB253225A
GB253225A GB741825A GB741825A GB253225A GB 253225 A GB253225 A GB 253225A GB 741825 A GB741825 A GB 741825A GB 741825 A GB741825 A GB 741825A GB 253225 A GB253225 A GB 253225A
Authority
GB
United Kingdom
Prior art keywords
sleeve
projection
barrel
bolt
stem
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
Application number
GB741825A
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.)
BSA Guns Ltd
Original Assignee
BSA Guns Ltd
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 BSA Guns Ltd filed Critical BSA Guns Ltd
Publication of GB253225A publication Critical patent/GB253225A/en
Expired legal-status Critical Current

Links

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
    • F41A5/02—Mechanisms or systems operated by propellant charge energy for automatically opening the lock recoil-operated

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Dowels (AREA)

Abstract

253,225. B.S.A. Guns, Ltd., and Norman, G. March 19, 1925. Addition to 233,817. Machine guns.-A modification of the screw mechanism described in the parent Specification for operating the sliding bolt-sleeve of a shortrecoil gun, comprises a fixed screw-threaded stem on which is mounted a rotatable sleeve adapted to be reciprocated by the barrel and formed with a helical cam which operates the bolt-sleeve. As shown, a fixed non-rotatable stem 1 is formed with steep pitch screw threads engaged by corresponding internal threads on a sleeve 11 adapted to be driven back, and consequently rotated, by the barrel. The sleeve has an external cam 12 adapted to engage a projection 14 on the boltsleeve so that its rotation effects relative displacement of the bolt-sleeve. For effecting the axial movement of the sleeve 11, the barrel extension 19 is formed with a projection 21 adapted to engage a circumferential groove 20 at the front of the sleeve, the front wall 23 of this groove being formed with a longitudinal slot 24 into which the projection 21 passes when the barrel is in its forward position, as shown in Fig. 1, the sleeve being then locked against rotation. A longitudinal slot 13 is formed through the cam 12 and rear flange to allow of the return movement of the projection 14 on the bolt-sleeve. The stem 1 and sleeve 11 are mounted in a cylindrical chamber 2 in a detachable cover 3 of the breech casing.
GB741825A 1924-02-28 1925-03-19 Improvements in and relating to automatic firearms Expired GB253225A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB510424A GB233817A (en) 1924-02-28 1924-02-28 Improvements in and relating to automatic firearms

Publications (1)

Publication Number Publication Date
GB253225A true GB253225A (en) 1926-06-17

Family

ID=9789794

Family Applications (2)

Application Number Title Priority Date Filing Date
GB510424A Expired GB233817A (en) 1924-02-28 1924-02-28 Improvements in and relating to automatic firearms
GB741825A Expired GB253225A (en) 1924-02-28 1925-03-19 Improvements in and relating to automatic firearms

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB510424A Expired GB233817A (en) 1924-02-28 1924-02-28 Improvements in and relating to automatic firearms

Country Status (1)

Country Link
GB (2) GB233817A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811902A (en) * 1952-01-18 1957-11-05 Paul H Dixon Mechanical bolt unlocking mechanism for recoiling barrel guns
FR2381268A1 (en) * 1977-02-17 1978-09-15 Vollmer Werke Maschf MANUAL FIREARM FOR SOCKETLESS AMMUNITION

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418946A (en) * 1942-08-15 1947-04-15 Remington Arms Co Inc Breech bolt lock for firearms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811902A (en) * 1952-01-18 1957-11-05 Paul H Dixon Mechanical bolt unlocking mechanism for recoiling barrel guns
FR2381268A1 (en) * 1977-02-17 1978-09-15 Vollmer Werke Maschf MANUAL FIREARM FOR SOCKETLESS AMMUNITION

Also Published As

Publication number Publication date
GB233817A (en) 1925-05-21

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