GB2313656A - Bolt head conversion - Google Patents

Bolt head conversion Download PDF

Info

Publication number
GB2313656A
GB2313656A GB9611405A GB9611405A GB2313656A GB 2313656 A GB2313656 A GB 2313656A GB 9611405 A GB9611405 A GB 9611405A GB 9611405 A GB9611405 A GB 9611405A GB 2313656 A GB2313656 A GB 2313656A
Authority
GB
United Kingdom
Prior art keywords
bolt
cartridge
bolt head
head
face
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.)
Granted
Application number
GB9611405A
Other versions
GB9611405D0 (en
GB2313656B (en
Inventor
Craig Montgomery Whitsey
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.)
CRAIG M WHITSEY
Original Assignee
CRAIG M WHITSEY
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 CRAIG M WHITSEY filed Critical CRAIG M WHITSEY
Priority to GB9611405A priority Critical patent/GB2313656B/en
Publication of GB9611405D0 publication Critical patent/GB9611405D0/en
Publication of GB2313656A publication Critical patent/GB2313656A/en
Application granted granted Critical
Publication of GB2313656B publication Critical patent/GB2313656B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F41A15/00—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun
    • F41A15/12—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns
    • F41A15/14—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns the ejector being mounted on or within the bolt; Extractors per se
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

A bolt head conversion allows rimless cartridges to be used instead of rimmed cartridges. The bolt head has a recessed cartridge face so that the base of the cartridge is retained within the head of the bolt. The extractor is a sliding plate shaped at the end to match the cartridge rebated rim so as to grip the cartridge rim under tension on the opening and withdrawal of the bolt. The ejector is a plunger spring loaded in the bolt face and when the bolt is withdrawn and the cartridge has cleared the barrel, the force of the spring plunger pushes the cartridge away from the bolt and ejection is accomplished.

Description

Bolt head conversion for the no.4 & no.5 Enfield rifle to take a rimless cartridge viz. 5.56mm Nato (223 Remington).
The conversion consists of a new bolt head with a recessed cartridge face so that the base of the cartridge is retained within the recess.
Extraction is accomplished by a sliding extractor held with a slot machined into the guide side of the new bolt head and is retained by a ball bearing and spring.
Ejection is achieved by a spring loaded plunger located in the recess of the bolt face opposite the extractor.

Claims (1)

  1. Claims.
    The design ofthe recessed bolt allows the use of rimless cartridges (viz. 5.56mm Nato) in the no.4 and no.5 Enfield rifles together with extractor and ejector incorporated in the bolt head without any modification of the rifle action.
GB9611405A 1996-05-31 1996-05-31 Bolt head conversion Expired - Fee Related GB2313656B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9611405A GB2313656B (en) 1996-05-31 1996-05-31 Bolt head conversion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9611405A GB2313656B (en) 1996-05-31 1996-05-31 Bolt head conversion

Publications (3)

Publication Number Publication Date
GB9611405D0 GB9611405D0 (en) 1996-08-07
GB2313656A true GB2313656A (en) 1997-12-03
GB2313656B GB2313656B (en) 2001-01-10

Family

ID=10794585

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9611405A Expired - Fee Related GB2313656B (en) 1996-05-31 1996-05-31 Bolt head conversion

Country Status (1)

Country Link
GB (1) GB2313656B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6415718B1 (en) 1999-08-27 2002-07-09 Lambeth Properties Limited Training cartridge for a self loading gun
US6564719B2 (en) 1999-08-27 2003-05-20 Lambeth Properties Limited Training cartridge for a self loading gun

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757611A (en) * 1952-11-12 1956-09-19 Finanziaria Ernesto Breda Soci Light machine gun for u.s.a. type cartridges 7.62 mm. calibre
GB897079A (en) * 1959-12-08 1962-05-23 Sterling Eng Co Ltd Improvements in or relating to rifles
GB1164634A (en) * 1965-11-15 1969-09-17 Husqvarna Vapenfabriks Ab Improvements in Bolt-Action Firearms
GB1299259A (en) * 1970-06-11 1972-12-13 Foerenade Fabriksverken Improvements in or relating to breech blocks for firearms
US3979849A (en) * 1974-06-03 1976-09-14 Haskins Jerry D Bolt action for repeating rifle
US4152855A (en) * 1976-07-28 1979-05-08 Dubiel Joseph T Rifle bolt locking apparatus
GB2058304A (en) * 1979-09-11 1981-04-08 Leader Propulsion Syst Pty Ltd Automatic fire control means and conversion to single shot
US4651455A (en) * 1985-06-21 1987-03-24 Geiser Jr John D Bolt action rifle

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757611A (en) * 1952-11-12 1956-09-19 Finanziaria Ernesto Breda Soci Light machine gun for u.s.a. type cartridges 7.62 mm. calibre
GB897079A (en) * 1959-12-08 1962-05-23 Sterling Eng Co Ltd Improvements in or relating to rifles
GB1164634A (en) * 1965-11-15 1969-09-17 Husqvarna Vapenfabriks Ab Improvements in Bolt-Action Firearms
GB1299259A (en) * 1970-06-11 1972-12-13 Foerenade Fabriksverken Improvements in or relating to breech blocks for firearms
US3979849A (en) * 1974-06-03 1976-09-14 Haskins Jerry D Bolt action for repeating rifle
US4152855A (en) * 1976-07-28 1979-05-08 Dubiel Joseph T Rifle bolt locking apparatus
GB2058304A (en) * 1979-09-11 1981-04-08 Leader Propulsion Syst Pty Ltd Automatic fire control means and conversion to single shot
US4651455A (en) * 1985-06-21 1987-03-24 Geiser Jr John D Bolt action rifle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6415718B1 (en) 1999-08-27 2002-07-09 Lambeth Properties Limited Training cartridge for a self loading gun
US6564719B2 (en) 1999-08-27 2003-05-20 Lambeth Properties Limited Training cartridge for a self loading gun

Also Published As

Publication number Publication date
GB9611405D0 (en) 1996-08-07
GB2313656B (en) 2001-01-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee