GB2313656A - Bolt head conversion - Google Patents
Bolt head conversion Download PDFInfo
- 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
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)
- 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.
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)
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)
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 |
-
1996
- 1996-05-31 GB GB9611405A patent/GB2313656B/en not_active Expired - Fee Related
Patent Citations (8)
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)
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 |