US3411229A - Barrel for firing practice ammunition from automatic firearms - Google Patents
Barrel for firing practice ammunition from automatic firearms Download PDFInfo
- Publication number
- US3411229A US3411229A US597271A US59727166A US3411229A US 3411229 A US3411229 A US 3411229A US 597271 A US597271 A US 597271A US 59727166 A US59727166 A US 59727166A US 3411229 A US3411229 A US 3411229A
- Authority
- US
- United States
- Prior art keywords
- barrel
- barrel portion
- automatic
- cartridge
- practice
- 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
Links
Images
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
- F41A5/24—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated by direct action of gas pressure on bolt or locking elements
-
- 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
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/12—Cartridge chambers; Chamber liners
-
- 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
- F41A33/00—Adaptations for training; Gun simulators
Definitions
- the present disclosure relates to a barrel for shooting practice ammunition from automatic firearms.
- the barrel is subdivided into front and rear portions that are axially movable relative to each other.
- the rear portion is springloaded and contains the automatic recoil elements. With this arrangement, the relatively small recoil forces of the practice ammunition are sufficient to actuate the automatic recoil elements in the relatively low inertia rear portion.
- the field of the present invention would include barrels for automatic firearms.
- the present invention divides the barrel of an automatic firearm to be used in firing practice ammunition into front and rear portions. Particularly advantageous results are obtained when the division is substantially flush with the cartridge case mouth of a practice cartridge inserted into the chamber.
- the front and rear portions are mounted to be axially displaceable with respect to each other, within certain limits, against a constantly effective bias force, for example, a spring.
- the propellant combustion gases are formed at the front end of the cartridge chamber under a relatively high pressure and travel a relatively short distance into the annular channel between the barrel portions; this relatively short travel distance assures a minimum of pressure reduction, which is advantageous because the pressure of the propellant gases is highest immediately adjacent the forward end of the cartridge case in the barrel.
- the high pressure propellant gases enter the annular channel, they exert their pressure upon the front face of the rear barrel portion to thus urge the rear barrel portion rearwardly.
- the projectile When the practice cartridge is loaded into the cartridge chamber, the projectile is positioned in the transitional zone of the barrel, that is, directly adjacent the annular channel; when the cartridge is fired, the projectile is immediately provided with a barrel guidance that is perfect and not interrupted along its path at any point so that precise projectile guidance and projectile trajectory is ensured.
- FIGURE 1 is an axial cross-sectional view of the barrel according to an embodiment of the present invention before the projectile is fired;
- FIGURE 2 is a view similar to FIGURE 1, showing the barrel portions shortly after the cartridge has been fired.
- a cylindrical barrel front portion 1 is provided with a rearwardly facing cylindrical recess 6 for slidably receiving the forward cylindrical portion of a rear barrel stub or rear barrel portion 2.
- the front and rear barrel portions are provided with inter-engaging splines or the like (not shown) to provide relative axial movement only.
- the front barrel portion 1 forms the rear face and radial outer end, and the rear barrel portion 2 forms the front face of an annular channel 4.
- the front barrel portion is provided with a conventional bore for guiding a projectile.
- the rear barrel portion 2 is provided with a conventional cartridge chamber aligned with the bore.
- the projectile of a practice cartridge is indicated in its loaded position by broken lines at 5 in FIGURE 1.
- the projectile 5 In its unfired, loaded position, the projectile 5 is already positioned in the rear end of the front barrel portion 1, that is, in the transition from the cartridge chamber to the groove and chase of the front barrel portion; the groove and chase not being in the drawing, because it is conventional.
- Conventional automatic recoil elements for example, locking or bolting parts of the weapon, have been illustrated schematically at 3. These automatic recoil elements are securely mounted on the rear barrel portion 2 for rearward movement therewith.
- a spring 7, or the like is provided to exert a constant forward resilient force on the rear barrel portion 2.
- the rear barrel portion is preferably constructed so that its forward face, that is, the front face of the annular channel 4, is axially flush with the forward-most edge of the practice cartridge case, as shown by the partial cross sectional view of the cartridge case in FIGURE 2, as determined by the forward abutment surface 8 of the rear barrel portion 2 for engaging the correspondingly shaped shoulder of the cartridge case.
- the front barrel portion cannot move because it is rigidly mounted, but the rear barrel portion moves relatively rearwardly under the influence of the high pressure gases acting upon the front face of the rear barrel portion 2.
- FIGURE 2 the cartridge has just been fired so that the projectile 5 has travelled a short distance forwardly in the bore of the front barrel portion 1, and the rear barrel portion 2 has moved rearwardly against the action of the spring 7 away from the front barrel portion 1. It is thus seen that the annular channel 4 will not interfere with the guidance of the projectile 5 and the relatively small inertia of the rear barrel portion 2 may be matched with the correspondingly relatively small gas pressure force of the practice cartridge so that the automatic recoil elements 3 will receive sufficient recoil for their automatic functioning.
- the annular slot 4 could be constructed so that it extends radially across the entire cross section of the barrel; with this modification, the two barrel portions 1 and 2 could be guided in a suitably provided sleeve that would preferably be attached to the front barrel portion 1, which sleeve would form the radially outer end wall of the annular channel 4.
- a barrel having a bore, having a cartridge chamber at its rear end and open at its front for shooting practice ammunition comprising a cartridge case from automatic firearms having spring-loaded automatic recoil elements wherein the improvement comprises: said barrel being subdivided (at the front end of the cartridge chamber) into a front portion and a rear portion mounted for limited axial displacement with respect to each other, said rear portion including said automatic recoil elements; bias means for providing a constantly effective bias force on said rear barrel portion toward said front barrel portion; said barrel portions having immediately adjacent front and rear faces forming an annular channel means in communication with said bore of said barrel and extending at least along a part of the barrel cross section for driving said rear barrel portion rearwardly against said bias means in response to gas pressure during burning of the cartridge propellant to operate the automatic recoil elements; said rear barrel portion having abutment means for engaging the practice cartridge case in its loaded position with the forwardmost end of the cartridge case flush with the front face and preventing forward movement relative to said rear portion.
- said front barrel portion has a rearwardly opening substantially cylindrical recess and said rear barrel portion has a forwardly extending, complementarily formed projection slidably received within said recess; said front barrel portion having said rear face forming the forward end of said recess, and said rear barrel portion having said front face forming the front portion of said projection.
- said front barrel portion has a rearwardly opening, substantially cylindrical recess and said rear barrel portion has a forwardly extending, complementarily formed projection slidably received within said recess; said front barrel portion having said rear face forming the forward end of said recess, and said rear barrel portion having said front face forming the front portion of said projection.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Toys (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Basic Packing Technique (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED0048760 | 1965-11-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3411229A true US3411229A (en) | 1968-11-19 |
Family
ID=7051400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US597271A Expired - Lifetime US3411229A (en) | 1965-11-26 | 1966-11-28 | Barrel for firing practice ammunition from automatic firearms |
Country Status (10)
Country | Link |
---|---|
US (1) | US3411229A (pt) |
AT (1) | AT268096B (pt) |
BE (1) | BE690206A (pt) |
DE (1) | DE1453914A1 (pt) |
ES (1) | ES333770A1 (pt) |
FR (1) | FR1502321A (pt) |
GB (1) | GB1170956A (pt) |
LU (1) | LU52415A1 (pt) |
NL (1) | NL6616437A (pt) |
NO (1) | NO117624B (pt) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837108A (en) * | 1973-06-05 | 1974-09-24 | G Seitz | Device for the reduction of kinetic energy of bullets from cartridge ammunition |
US5140893A (en) * | 1986-04-16 | 1992-08-25 | Leiter Edward J | Blank firing adapter |
US5983772A (en) * | 1997-08-28 | 1999-11-16 | Reynolds; George L. | Subcaliber device/blank firing adaptor for blowback or recoil operated weapons |
WO2000065298A3 (en) * | 1999-04-23 | 2001-01-25 | Snc Technologies Inc | Two-piece barrel for low-energy training ammunition |
US9541343B2 (en) * | 2015-01-21 | 2017-01-10 | James A. Dodson | Interchangeable chamber and barrel system |
US10330416B2 (en) | 2015-01-21 | 2019-06-25 | Wolf Precision, Inc. | Interchangeable chamber and barrel system |
AT17455U1 (de) * | 2021-02-24 | 2022-05-15 | Hermann Schranz Ing Viktor | Verschluß für mehrschüssige Pistolen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1343444A (en) * | 1920-06-15 | Firearm, | ||
US2090657A (en) * | 1933-08-26 | 1937-08-24 | David M Williams | Automatic firearm |
US2847787A (en) * | 1955-07-05 | 1958-08-19 | Olin Mathieson Chemical Corp I | Firearm with movable chamber and sealing sleeve |
US2992596A (en) * | 1959-07-28 | 1961-07-18 | Hammer Alexander | Floating chamber |
-
1965
- 1965-11-26 DE DE19651453914 patent/DE1453914A1/de active Pending
-
1966
- 1966-11-11 NO NO165546A patent/NO117624B/no unknown
- 1966-11-22 NL NL6616437A patent/NL6616437A/xx unknown
- 1966-11-22 LU LU52415D patent/LU52415A1/xx unknown
- 1966-11-24 AT AT1086866A patent/AT268096B/de active
- 1966-11-25 BE BE690206D patent/BE690206A/xx not_active Expired
- 1966-11-25 ES ES0333770A patent/ES333770A1/es not_active Expired
- 1966-11-25 GB GB53013/66A patent/GB1170956A/en not_active Expired
- 1966-11-25 FR FR85097A patent/FR1502321A/fr not_active Expired
- 1966-11-28 US US597271A patent/US3411229A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1343444A (en) * | 1920-06-15 | Firearm, | ||
US2090657A (en) * | 1933-08-26 | 1937-08-24 | David M Williams | Automatic firearm |
US2847787A (en) * | 1955-07-05 | 1958-08-19 | Olin Mathieson Chemical Corp I | Firearm with movable chamber and sealing sleeve |
US2992596A (en) * | 1959-07-28 | 1961-07-18 | Hammer Alexander | Floating chamber |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837108A (en) * | 1973-06-05 | 1974-09-24 | G Seitz | Device for the reduction of kinetic energy of bullets from cartridge ammunition |
US5140893A (en) * | 1986-04-16 | 1992-08-25 | Leiter Edward J | Blank firing adapter |
US5983772A (en) * | 1997-08-28 | 1999-11-16 | Reynolds; George L. | Subcaliber device/blank firing adaptor for blowback or recoil operated weapons |
US6202533B1 (en) | 1997-08-28 | 2001-03-20 | Armalite, Inc. | Subcaliber device/blank firing adaptor for blowback operated or recoil operated weapons |
WO2000065298A3 (en) * | 1999-04-23 | 2001-01-25 | Snc Technologies Inc | Two-piece barrel for low-energy training ammunition |
US9541343B2 (en) * | 2015-01-21 | 2017-01-10 | James A. Dodson | Interchangeable chamber and barrel system |
US10330416B2 (en) | 2015-01-21 | 2019-06-25 | Wolf Precision, Inc. | Interchangeable chamber and barrel system |
AT17455U1 (de) * | 2021-02-24 | 2022-05-15 | Hermann Schranz Ing Viktor | Verschluß für mehrschüssige Pistolen |
Also Published As
Publication number | Publication date |
---|---|
LU52415A1 (pt) | 1967-01-23 |
AT268096B (de) | 1969-01-27 |
GB1170956A (en) | 1969-11-19 |
NO117624B (pt) | 1969-09-01 |
NL6616437A (pt) | 1967-05-29 |
FR1502321A (fr) | 1967-11-18 |
DE1453914A1 (de) | 1969-08-21 |
ES333770A1 (es) | 1967-10-16 |
BE690206A (pt) | 1967-05-02 |
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