US3710723A - Tracer projectile - Google Patents
Tracer projectile Download PDFInfo
- Publication number
- US3710723A US3710723A US00057978A US3710723DA US3710723A US 3710723 A US3710723 A US 3710723A US 00057978 A US00057978 A US 00057978A US 3710723D A US3710723D A US 3710723DA US 3710723 A US3710723 A US 3710723A
- Authority
- US
- United States
- Prior art keywords
- shell
- recess
- pack
- pyrotechnic
- projectile
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
- F42B12/38—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information of tracer type
Definitions
- the invention relates to a tracer projectile comprising a projectile body which contains a rearwardly open recess for a pyrotechnic pack.
- a screw joint 2 connects the body 1 of a projectile to its cap 3.
- the body 1 of the projectile is provided with' a cavity 4 which may contain, for instance, a blank charge.
- a recess 5 extending into the body of the projectile from the rear comprises a forward portion 5a and a relatively enlarged rear portion 5b. The transition between the two portions 5a and 5b is formed by a coned surface 6.
- the shell 7 of a pack containing a pyrotechnic charge 1 1 has external dimensions that substantially fit into the recess 5 but leave a small amount of clearance between the shell 7 and the inside wall of the recess 5.
- a coned face 8 on the shell 7 of the pack bears against a corresponding coned face 6 in the recess 5.
- the shell 7 is pushed axially forwards by a retaining element 9 in the form ofa screw ring which is insertable into the rear end of the projectile body 1.
- the propellant gases are sealed by the cooperating coned faces 6 and 8. These two faces 6 and 8 also function to align the shell 7 centrally inside the recess 5. Consequently very close tolerances between the shell 7 of the pack and the recess 5 are not needed and the shell 7 has freedom to change its dimensions, as usually occurs after the case has been pressed into position. Moreover, that part of the shell 7 which extends forwards of the coned face 8 can freely move inside the bore 50 when it thermally expands under the heat of the burning pyrotechnic charge.
- a tracer projectile comprising a body having a rearwardly open recess, a pyrotechnic pack in said recess having a shell located with radial clearance inside said recess, cooperating annular coned faces on said shell and in said recess, a threaded ring screwed into said recess to the rear of said shell so that the axial thrust of said threaded ring on said shell will cause said pyrotechnic pack to be axially aligned by the cooperation of said coned annular faces, radial slots provided between said threaded ring and said shell.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Toys (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
A tracer projectile comprising a body having a rearwardly open recess with a pyrotechnic pack in the recess. The shell of the pack is located with radial clearance inside the recess. There are cooperating annular coned faces on the shell and in the recess. A threaded steel ring is screwed into the recess to the rear of the shell so that the axial thrust of the threaded ring on the shell will cause the pyrotechnic pack to be axially aligned by the cooperation of the annular coned faces. The threaded ring is provided with said radial slots on its side facing the shell.
Description
rte States Patent 1 Muller et a1.
[ 51 Jan. 16,1973
[54] TRACER PROJECTILE Werkzeugmaschinenfabrik Oerlikon-Buhrle AG, Zurich, Switzerland [22] Filed: July 24, 1970 [2]] Appl. No.: 57,978
[73] Assignee:
[30] Foreign Application Priority Data Aug. 5, 1969 Switzerland ..11860/69 [56] References Cited UNITED STATES PATENTS 1/1960 Barker ..102/90X 4/1970 Grolly ..102/87X 3,272,126 9/1966 Edelman et al 102/90 X 3,473,472 10/1969 Bliss et al ...l02/87 X 1,875,985 9/1932 Brandt 1 ..102/90 1,105,849 8/1914 Semple... 102/56 3,532,056 10/1970 Irion ..102/56 3,176,617 6/1962 Brafford ....102/24 R 3,487,780 1/1970 Troen et a1. ...l02/87 X Primary Examiner-Benjamin A. Borchelt Assistant Examinerl-l. J. Tudor Attorney-Wenderoth, Lind & Ponack [57] ABSTRACT A tracer projectile comprising a body having a rearwardly open recess with a pyrotechnic pack in the recess. The shell of the pack is located with radial clearance inside the recess. There are cooperating annular coned faces on the shell and in the recess. A threaded steel ring is screwed into the recess to the rear of the shell so that the axial thrust of the threaded ring on the shell will cause the pyrotechnic pack to be axially aligned by the cooperation of the annular coned faces. The threaded ring is provided with said radial slots on its side facing the shell.
3 Claims, 1 Drawing Figure PATENTEDJAN 16 I975 3.710.723
I III l g I l2 5 iii l3 Attorneys TRACER PROJECTILE The invention relates to a tracer projectile comprising a projectile body which contains a rearwardly open recess for a pyrotechnic pack.
In a tracer projectile of the specified kind already known in the art the pyrotechnic pack is screwed into the rear end of the body of the projectile. The rear end of the shell of the pack has a flange-like enlargement of its external diameter that conforms with the caliber of the projectile. The enlargement extends the external contours of the projectile body. In this known tracer projectile the body of the projectile and the pyrotechnic pack must be exactly coaxial since otherwise difficulties would arise in fitting the cartridge to the projectile. By pressing the pyrotechnic charge into its shell the latter may be expanded, in which case the external threads on the pyrotechnic pack will no longer fit the internal threads in the body of the projectile. Since the body of the projectile and the pyrotechnic pack usually consist of different materials the screw connection also prevents thermal expansion between the two parts. Finally, the pyrotechnic pack may frac-' ture and splinter when exposed to the effect of the propellant gases when the tracer projectile is fired, and a muzzle velocity attachment on the barrel could also suffer damage.
It is the object of the present invention to eliminate the drawbacks of the prior art tracer projectile. Ac-' cording to the invention this is achieved by locating the pyrotechnic pack with radial clearance inside the recess, providing the pack and the recess with cooperating annular coned faces and by screwing a threaded ring into the open end of the recess to the rear of the pyrotechnic pack in such manner that the axial thrust of the threaded ring applied to the pyrotechnic pack will result in axial central alignment by virtue of the cooperation of the coned annular faces.
An embodiment of the proposed tracer projectile will be hereunder more particularly described with reference to the accompanying drawing.
A screw joint 2 connects the body 1 of a projectile to its cap 3. To the rear of the cap 3 the body 1 of the projectile is provided with' a cavity 4 which may contain, for instance, a blank charge. A recess 5 extending into the body of the projectile from the rear comprises a forward portion 5a and a relatively enlarged rear portion 5b. The transition between the two portions 5a and 5b is formed by a coned surface 6. The shell 7 of a pack containing a pyrotechnic charge 1 1 has external dimensions that substantially fit into the recess 5 but leave a small amount of clearance between the shell 7 and the inside wall of the recess 5. A coned face 8 on the shell 7 of the pack bears against a corresponding coned face 6 in the recess 5. The shell 7 is pushed axially forwards by a retaining element 9 in the form ofa screw ring which is insertable into the rear end of the projectile body 1.
This ensures contact between the coned face 6 in the recess and the coned face 8 of the shell which is thus axially aligned. The retaining element 9 has a central hole 16 and radial slots 10 on the side facing the shell 7. Pressed into the shell 7 is a pyrotechnic charge 11 com prising three stages. Behind the charge 11 is an initiating charge 12. Rearwardly the shell 7 is closed by a disc 13 which is held in place by a shim .14 and an interposed sealing ring 15.
The above described tracer projectile functions as follows:
The propellant gases WhlCh discharge the pro ectile punch a hole into the disc 13 and ignite the initiating charge 12 which in turn ignites the pyrotechnic charge 1 1. At the same time the propellant gases enter the gap between the pyrotechnic charge 11 and the inside wall of the shell 7. In order to prevent these gases from partly or completely ejecting the pyrotechnic charge the propellant gases are diverted through the radial slots 10 in the retaining ring 9 into the clearance gap between the body 1 of the projectile and the outside wall of the shell 7. This enables the pressure above the end of the shell 7 to be'fully equalized. If for any reason this pressure equalization should fail and the shell 7 should be fractured, allowing splinters to break away, these will still be prevented from falling out by the retaining ring 9.
The propellant gases are sealed by the cooperating coned faces 6 and 8. These two faces 6 and 8 also function to align the shell 7 centrally inside the recess 5. Consequently very close tolerances between the shell 7 of the pack and the recess 5 are not needed and the shell 7 has freedom to change its dimensions, as usually occurs after the case has been pressed into position. Moreover, that part of the shell 7 which extends forwards of the coned face 8 can freely move inside the bore 50 when it thermally expands under the heat of the burning pyrotechnic charge.
We claim:
1. A tracer projectile comprising a body having a rearwardly open recess, a pyrotechnic pack in said recess having a shell located with radial clearance inside said recess, cooperating annular coned faces on said shell and in said recess, a threaded ring screwed into said recess to the rear of said shell so that the axial thrust of said threaded ring on said shell will cause said pyrotechnic pack to be axially aligned by the cooperation of said coned annular faces, radial slots provided between said threaded ring and said shell.
2. A tracer projectile according to claim 1 wherein said threaded ring is provided with said radial slots on its side facing said shell.
3. A tracer projectile according to claim 1 wherein said annular coned surface on said shell is provided at the rear end of said shell so that the major part of the shell extends freely into said recess.
Claims (3)
1. A tracer projectile comprising a body having a rearwardly open recess, a pyrotechnic pack in said recess having a shell located with radial clearance inside said recess, cooperating annular coned faces on said shell and in said recess, a threaded ring screwed into said recess to the rear of said shell so that the axial thrust of said threaded ring on said shell will cause said pyrotechnic pack to be axially aligned by the cooperation of said coned annular faces, radial slots provided between said threaded ring and said shell.
2. A tracer projectile according to claim 1 wherein said threaded ring is provided with said radial slots on its side facing said shell.
3. A tracer projectile according to claim 1 wherein said annular coned surface on said shell is provided at the rear end of said shell so that the major part of the shell extends freely into said recess.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1186069A CH511416A (en) | 1969-08-05 | 1969-08-05 | Luminous bullet |
Publications (1)
Publication Number | Publication Date |
---|---|
US3710723A true US3710723A (en) | 1973-01-16 |
Family
ID=4377597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00057978A Expired - Lifetime US3710723A (en) | 1969-08-05 | 1970-07-24 | Tracer projectile |
Country Status (10)
Country | Link |
---|---|
US (1) | US3710723A (en) |
JP (1) | JPS4943438B1 (en) |
BE (1) | BE753887A (en) |
CH (1) | CH511416A (en) |
DE (1) | DE2038250C3 (en) |
ES (1) | ES382254A1 (en) |
FR (1) | FR2056595A5 (en) |
GB (1) | GB1299287A (en) |
NL (1) | NL158924B (en) |
SE (1) | SE352730B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3972291A (en) * | 1974-11-22 | 1976-08-03 | The United States Of America As Represented By The Secretary Of The Army | Extended range tracer folded cup |
US4142466A (en) * | 1976-07-31 | 1979-03-06 | Dynamit Nobel Aktiengesellschaft | Projectile with at least one pyrotechnical charge, especially a tracer charge |
US4353301A (en) * | 1978-03-08 | 1982-10-12 | A/S Raufoss Ammunisjonsfabrikker | Smoke grenade |
JPS5831295A (en) * | 1981-08-05 | 1983-02-23 | ウエルクツオイクマシイネンフアブリ−ク・エ−リコン−ビユ−レ・アクチエンゲゼルシヤフト | Projectile with light tracer sleeve and method of fixing light tracer sleeve into hole of tail section of airframe |
US4690029A (en) * | 1985-12-16 | 1987-09-01 | Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag | Method of securing a flare composition sleeve in a blind borehole at the tail portion of a projectile body |
US4754704A (en) * | 1985-03-22 | 1988-07-05 | Nico-Pyrotechnik Hanns-Jurgen Diederichs Gmbh & Co. Kg | Propellant charge for the reduction of base eddying |
US4807535A (en) * | 1984-10-25 | 1989-02-28 | Luchaire S.A. | Device for reducing ammunition drag and ammunition for receiving said device |
WO1991019160A1 (en) * | 1990-06-05 | 1991-12-12 | Olin Corporation | Kinetic energy projectile with pyrotechnic payload |
US5760329A (en) * | 1997-02-19 | 1998-06-02 | Metallwerk Elisenhutte Gmbh | Ammunition round for guns |
USD751167S1 (en) * | 2014-05-13 | 2016-03-08 | Physical Optics Corporation | Projectile |
US20240093979A1 (en) * | 2022-09-13 | 2024-03-21 | General Dynamics Ordnance And Tactical Systems - Canada, Inc. | Closure disk assembly for tracer projectile |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2639884A1 (en) * | 1976-09-04 | 1978-03-09 | Dynamit Nobel Ag | BULLET FOR PRACTICE AMMUNITION |
AT382235B (en) * | 1982-11-25 | 1987-01-26 | Hirtenberger Patronen | TRACK CARTRIDGE |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1105849A (en) * | 1914-08-04 | Explosive projectile | ||
US1875985A (en) * | 1930-05-16 | 1932-09-06 | Brandt Edgar William | Projectile |
US2920566A (en) * | 1942-02-12 | 1960-01-12 | Maurice E Barker | Tear gas bullet |
US3176617A (en) * | 1962-06-11 | 1965-04-06 | Beloit Corp | Separate loading of artiliery propellant charges |
US3272126A (en) * | 1964-03-20 | 1966-09-13 | David J Edelman | Pyrotechnic fuze system |
US3473472A (en) * | 1964-08-13 | 1969-10-21 | Us Navy | Photoflash cartridge |
US3487780A (en) * | 1967-03-07 | 1970-01-06 | Edvard Troen | Rockets for subcaliber training system for anti-tank weapon |
US3507221A (en) * | 1966-07-21 | 1970-04-21 | Brevets Aero Mecaniques | Armor piercing,sabot shells |
US3532056A (en) * | 1966-02-11 | 1970-10-06 | Ferdinand Irion | Shell with booster charge support and fuze threaded at the interior thereof |
-
1969
- 1969-08-05 CH CH1186069A patent/CH511416A/en not_active IP Right Cessation
-
1970
- 1970-07-08 SE SE09463/70A patent/SE352730B/xx unknown
- 1970-07-24 GB GB35909/70A patent/GB1299287A/en not_active Expired
- 1970-07-24 US US00057978A patent/US3710723A/en not_active Expired - Lifetime
- 1970-07-24 BE BE753887D patent/BE753887A/en not_active IP Right Cessation
- 1970-07-28 ES ES382254A patent/ES382254A1/en not_active Expired
- 1970-07-31 DE DE2038250A patent/DE2038250C3/en not_active Expired
- 1970-08-04 JP JP45067794A patent/JPS4943438B1/ja active Pending
- 1970-08-05 NL NL7011556.A patent/NL158924B/en not_active IP Right Cessation
- 1970-08-05 FR FR7028820A patent/FR2056595A5/fr not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1105849A (en) * | 1914-08-04 | Explosive projectile | ||
US1875985A (en) * | 1930-05-16 | 1932-09-06 | Brandt Edgar William | Projectile |
US2920566A (en) * | 1942-02-12 | 1960-01-12 | Maurice E Barker | Tear gas bullet |
US3176617A (en) * | 1962-06-11 | 1965-04-06 | Beloit Corp | Separate loading of artiliery propellant charges |
US3272126A (en) * | 1964-03-20 | 1966-09-13 | David J Edelman | Pyrotechnic fuze system |
US3473472A (en) * | 1964-08-13 | 1969-10-21 | Us Navy | Photoflash cartridge |
US3532056A (en) * | 1966-02-11 | 1970-10-06 | Ferdinand Irion | Shell with booster charge support and fuze threaded at the interior thereof |
US3507221A (en) * | 1966-07-21 | 1970-04-21 | Brevets Aero Mecaniques | Armor piercing,sabot shells |
US3487780A (en) * | 1967-03-07 | 1970-01-06 | Edvard Troen | Rockets for subcaliber training system for anti-tank weapon |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3972291A (en) * | 1974-11-22 | 1976-08-03 | The United States Of America As Represented By The Secretary Of The Army | Extended range tracer folded cup |
US4142466A (en) * | 1976-07-31 | 1979-03-06 | Dynamit Nobel Aktiengesellschaft | Projectile with at least one pyrotechnical charge, especially a tracer charge |
US4353301A (en) * | 1978-03-08 | 1982-10-12 | A/S Raufoss Ammunisjonsfabrikker | Smoke grenade |
JPS6364716B2 (en) * | 1981-08-05 | 1988-12-13 | ||
JPS5831295A (en) * | 1981-08-05 | 1983-02-23 | ウエルクツオイクマシイネンフアブリ−ク・エ−リコン−ビユ−レ・アクチエンゲゼルシヤフト | Projectile with light tracer sleeve and method of fixing light tracer sleeve into hole of tail section of airframe |
US4807535A (en) * | 1984-10-25 | 1989-02-28 | Luchaire S.A. | Device for reducing ammunition drag and ammunition for receiving said device |
US4754704A (en) * | 1985-03-22 | 1988-07-05 | Nico-Pyrotechnik Hanns-Jurgen Diederichs Gmbh & Co. Kg | Propellant charge for the reduction of base eddying |
US4690029A (en) * | 1985-12-16 | 1987-09-01 | Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag | Method of securing a flare composition sleeve in a blind borehole at the tail portion of a projectile body |
WO1991019160A1 (en) * | 1990-06-05 | 1991-12-12 | Olin Corporation | Kinetic energy projectile with pyrotechnic payload |
US5097766A (en) * | 1990-06-05 | 1992-03-24 | Olin Corporation | Kinetic energy projectile with pyrotechnic payload |
US5760329A (en) * | 1997-02-19 | 1998-06-02 | Metallwerk Elisenhutte Gmbh | Ammunition round for guns |
USD751167S1 (en) * | 2014-05-13 | 2016-03-08 | Physical Optics Corporation | Projectile |
US20240093979A1 (en) * | 2022-09-13 | 2024-03-21 | General Dynamics Ordnance And Tactical Systems - Canada, Inc. | Closure disk assembly for tracer projectile |
US11965721B2 (en) * | 2022-09-13 | 2024-04-23 | General Dynamics Ordnance and Tactical Systems—Canada, Inc. | Closure disk assembly for tracer projectile |
Also Published As
Publication number | Publication date |
---|---|
NL158924B (en) | 1978-12-15 |
GB1299287A (en) | 1972-12-13 |
DE2038250A1 (en) | 1971-02-25 |
FR2056595A5 (en) | 1971-05-14 |
CH511416A (en) | 1971-08-15 |
JPS4943438B1 (en) | 1974-11-21 |
DE2038250B2 (en) | 1973-03-15 |
NL7011556A (en) | 1971-02-09 |
SE352730B (en) | 1973-01-08 |
BE753887A (en) | 1970-12-31 |
DE2038250C3 (en) | 1973-10-04 |
ES382254A1 (en) | 1972-12-01 |
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