US3771453A - Ammunition primer - Google Patents
Ammunition primer Download PDFInfo
- Publication number
- US3771453A US3771453A US00266957A US3771453DA US3771453A US 3771453 A US3771453 A US 3771453A US 00266957 A US00266957 A US 00266957A US 3771453D A US3771453D A US 3771453DA US 3771453 A US3771453 A US 3771453A
- Authority
- US
- United States
- Prior art keywords
- percent
- primer
- cup
- propellant
- igniter button
- 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
- 239000003380 propellant Substances 0.000 claims abstract description 20
- 239000008188 pellet Substances 0.000 claims abstract description 7
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 6
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000020 Nitrocellulose Substances 0.000 claims description 3
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 claims description 3
- TZRXHJWUDPFEEY-UHFFFAOYSA-N Pentaerythritol Tetranitrate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)CO[N+]([O-])=O TZRXHJWUDPFEEY-UHFFFAOYSA-N 0.000 claims description 3
- XBDYBAVJXHJMNQ-UHFFFAOYSA-N Tetrahydroanthracene Natural products C1=CC=C2C=C(CCCC3)C3=CC2=C1 XBDYBAVJXHJMNQ-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- PZIMIYVOZBTARW-UHFFFAOYSA-N centralite Chemical compound C=1C=CC=CC=1N(CC)C(=O)N(CC)C1=CC=CC=C1 PZIMIYVOZBTARW-UHFFFAOYSA-N 0.000 claims description 3
- 229960003711 glyceryl trinitrate Drugs 0.000 claims description 3
- 229920001220 nitrocellulos Polymers 0.000 claims description 3
- 238000009527 percussion Methods 0.000 claims description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims description 3
- 239000004323 potassium nitrate Substances 0.000 claims description 3
- YPMOSINXXHVZIL-UHFFFAOYSA-N sulfanylideneantimony Chemical compound [Sb]=S YPMOSINXXHVZIL-UHFFFAOYSA-N 0.000 claims description 3
- IFLREYGFSNHWGE-UHFFFAOYSA-N tetracene Chemical compound C1=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C21 IFLREYGFSNHWGE-UHFFFAOYSA-N 0.000 claims description 3
- WETZJIOEDGMBMA-UHFFFAOYSA-L lead styphnate Chemical compound [Pb+2].[O-]C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C([O-])=C1[N+]([O-])=O WETZJIOEDGMBMA-UHFFFAOYSA-L 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- -1 32.0 percent Chemical compound 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/10—Percussion caps
Definitions
- ABSTRACT A primer for small and medium caliber ammunition which produces a jet-like flame that extends into the propellant bed of the munition.
- the primer has a primer pellet seated in a primer cup, the pellet including a plurality of centrally apertur'ed propellant sheets and an igniter button of pyrotechnic mix filling the central apertures, and an anvil secured within the cup and having a conically shaped central portion embedded in the igniter button.
- This invention relates to primers and, more particularly, to primers for small and medium caliber ammunition.
- lt is an object of the invention to provide a primer that will accomplish propellant ignition with the use of hot gases, eliminating the need for metal powders or other hot particles to carry heat downstream.
- Another object of the invention is to provide such a primer which is ashless and will minimize barrel erosion in associated weapons employed to fire ammunition containing this primer.
- a further object of the invention is to provide such a primer having minimal brisance, thereby enabling reductions in cup wall thickness and firing pin energy.
- FIGURE is a longitudinal sectional view of a preferred ammunition primer embodying the principles of the invention.
- the primer shown generally at 10, is particularly useful in small and medium caliber ammunition arrangements.
- the primer is formed of a relatively thinwalled cup member 11 in the bottom of which is seated a primer pellet that includes a plurality of propellant sheets 12.
- Each propellant sheet has a central aperture 13 of predetermined size and location and is capable of being positioned in uniform alignment to receive an igniter button 14 which has a portion that fills the central openings in the propellant sheets upon assembly.
- the button has a head portion that overlies and contacts the adjacent surface area of the outer propellant sheet.
- Both the anvil 15 and cup 11 are formed of brass material.
- the propellant sheets which deflagrate under controlled high pressure conditions are composed of nitrocellulose, 52.15 percent by weight; nitroglycerine, 43.0 percent; diethylphthlate, 3.0 percent; potassium nitrate, 1.25 percent; and ethyl centralite, 0.6 percent.
- the igniter button is preferably a percussion sensitive pyrotechnic mix composed of lead styphenate, 37.0 percent by weight; tetracene, 4.0 percent; barium nitrate, 32.0 percent, PETN 5.0 percent; antimony sulfide, 15.0 percent; and aluminum powder, 7.0 percent.
- the highly reactive propellant sheet material is initiated by the igniter button to produce a controllable high velocity jetlike flame that extends into the propellant bed of the ammunition.
- the burning rate of the propellant sheet material is controlled by the size of the vent in the web between the primer cavity and the case chamber in the munition employing the improved primer.
- a regulated high primer burning rate can be achieved with high pressure to produce the jet-like flame.
- propellant ignition can be obtained with hot gases only, and the need for metal powders or other hot particles to carry heat downstream is eliminated.
- an ashless primer is employed which will leave a clean barrel, especially desirable in automatic weapons, and minimize barrel erosion.
- the size and weight of the primer is reduced, as well as the required firing pin energy, due to the use of relatively thin primer cup walls made possible by the significant reduction in brisance.
- a primer for small and medium caliber ammunition comprising,
- a primer pellet seated in said cup and including a plurality of propellant sheets each having a central aperture therethrough in substantial alignment with each other and an igniter button of pyrotechnic mix filling said central apertures, and
- an anvil secured within said cup and having a conically shaped central portion embedded in said igniter button.
- propellant sheets are composed of, by weight, 52.15 percent nitrocellulose; 43.0 percent nitroglycerine; 3.0 percent diethylphthalate; 1.25 percent potassium nitrate; and 0.6 percent ethyl centralite.
- said igniter button is a percussion sensitive pyrotechnic mix composed 1 of, by weight, 37.0 percent lead styphnate; 4.0 percent tetracene; 32.0 percent barium nitrate; 5.0 percent PETN; 15.0 percent antimony sulfide; and 7.0 percent aluminum powder.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
Abstract
A primer for small and medium caliber ammunition which produces a jet-like flame that extends into the propellant bed of the munition. The primer has a primer pellet seated in a primer cup, the pellet including a plurality of centrally apertured propellant sheets and an igniter button of pyrotechnic mix filling the central apertures, and an anvil secured within the cup and having a conically shaped central portion embedded in the igniter button.
Description
United States Patent [191 Ciccone et a1.
[ Nov. 13, 1973 Assignee:
AMMUNITION PRIMER Inventors: Thomas Q. Ciccone, Cornwells Heights, Pa.; Wilmer White, Haddonfield, NJ.
The United States of America as represented by the Secretary of the Army, Washington, DC.
Filed: June 28, 1972 Appl. No.: 266,957
US. Cl. 102/45, 102/86.5 Int. Cl. F42c 19/08 Field of Search 102/865, 45, 46,
References Cited UNITED STATES PATENTS 2/1961 Duffield 102/865 l/l924 Miller l02/49.7 6/1910 Buell 102/865 Primary ExaminerS amuel W. Engle Att0rneyHarry M. Saragovitz et al.
[5 7] ABSTRACT A primer for small and medium caliber ammunition which produces a jet-like flame that extends into the propellant bed of the munition. The primer has a primer pellet seated in a primer cup, the pellet including a plurality of centrally apertur'ed propellant sheets and an igniter button of pyrotechnic mix filling the central apertures, and an anvil secured within the cup and having a conically shaped central portion embedded in the igniter button.
4 Claims, 1 Drawing Figure AMMUNITION PRIMER This invention relates to primers and, more particularly, to primers for small and medium caliber ammunition.
lt is an object of the invention to provide a primer that will accomplish propellant ignition with the use of hot gases, eliminating the need for metal powders or other hot particles to carry heat downstream.
Another object of the invention is to provide such a primer which is ashless and will minimize barrel erosion in associated weapons employed to fire ammunition containing this primer.
A further object of the invention is to provide such a primer having minimal brisance, thereby enabling reductions in cup wall thickness and firing pin energy.
These and other objects, features and advantages will become apparent from the following description and accompanying drawing in which the sole FIGURE is a longitudinal sectional view of a preferred ammunition primer embodying the principles of the invention.
The primer, shown generally at 10, is particularly useful in small and medium caliber ammunition arrangements. The primer is formed of a relatively thinwalled cup member 11 in the bottom of which is seated a primer pellet that includes a plurality of propellant sheets 12. Each propellant sheet has a central aperture 13 of predetermined size and location and is capable of being positioned in uniform alignment to receive an igniter button 14 which has a portion that fills the central openings in the propellant sheets upon assembly. The button has a head portion that overlies and contacts the adjacent surface area of the outer propellant sheet. When the conically shaped anvil 15 is press-fitted into position within the sidewalls of the cup 11, the anvil nose portion 16 is embedded into the igniter button material 14.
Both the anvil 15 and cup 11 are formed of brass material. Preferably, the propellant sheets which deflagrate under controlled high pressure conditions are composed of nitrocellulose, 52.15 percent by weight; nitroglycerine, 43.0 percent; diethylphthlate, 3.0 percent; potassium nitrate, 1.25 percent; and ethyl centralite, 0.6 percent. The igniter button is preferably a percussion sensitive pyrotechnic mix composed of lead styphenate, 37.0 percent by weight; tetracene, 4.0 percent; barium nitrate, 32.0 percent, PETN 5.0 percent; antimony sulfide, 15.0 percent; and aluminum powder, 7.0 percent.
When a firing pin strikes the primer cup base and crushed the igniter button against the anvil, the highly reactive propellant sheet material is initiated by the igniter button to produce a controllable high velocity jetlike flame that extends into the propellant bed of the ammunition. The burning rate of the propellant sheet material is controlled by the size of the vent in the web between the primer cavity and the case chamber in the munition employing the improved primer. Thus, a regulated high primer burning rate can be achieved with high pressure to produce the jet-like flame. As a result, propellant ignition can be obtained with hot gases only, and the need for metal powders or other hot particles to carry heat downstream is eliminated. In effect, an ashless primer is employed which will leave a clean barrel, especially desirable in automatic weapons, and minimize barrel erosion. Also, the size and weight of the primer is reduced, as well as the required firing pin energy, due to the use of relatively thin primer cup walls made possible by the significant reduction in brisance.
Various modifications, changes or alterations may be resorted to without departing from the scope of the invention defined as follows.
We claim:
1. A primer for small and medium caliber ammunition comprising,
a primer cup,
a primer pellet seated in said cup and including a plurality of propellant sheets each having a central aperture therethrough in substantial alignment with each other and an igniter button of pyrotechnic mix filling said central apertures, and
an anvil secured within said cup and having a conically shaped central portion embedded in said igniter button.
2. The structure in accordance with claim I wherein said igniter button has a head portion overlying and contacting an adjacent surface of one of said propellant sheets.
3. The structure of claim 2 wherein said propellant sheets are composed of, by weight, 52.15 percent nitrocellulose; 43.0 percent nitroglycerine; 3.0 percent diethylphthalate; 1.25 percent potassium nitrate; and 0.6 percent ethyl centralite.
4. The structure of claim 3 wherein said igniter button is a percussion sensitive pyrotechnic mix composed 1 of, by weight, 37.0 percent lead styphnate; 4.0 percent tetracene; 32.0 percent barium nitrate; 5.0 percent PETN; 15.0 percent antimony sulfide; and 7.0 percent aluminum powder.
Claims (4)
1. A primer for small and medium caliber ammunition comprising, a primer cup, a primer pellet seated in said cup and including a plurality of propellant sheets each having a central aperture therethrough in substantial alignment with each other and an igniter button of pyrotechnic mix filling said central apertures, and an anvil secured within said cup and having a conically shaped central portion embedded in said igniter button.
2. The structure in accordance with claim 1 wherein said igniter button has a head portion overlying and contacting an adjacent surface of one of said propellant sheets.
3. The structure of claim 2 wherein said propellant sheets are composed of, by weight, 52.15 percent nitrocellulose; 43.0 percent nitroglycerine; 3.0 percent diethylphthalate; 1.25 percent potassium nitrate; and 0.6 percent ethyl centralite.
4. The structure of claim 3 wherein said igniter button is a percussion sensitive pyrotechnic mix composed of, by weight, 37.0 percent lead styphnate; 4.0 percent tetracene; 32.0 percent barium nitrate; 5.0 percent PETN; 15.0 percent antimony sulfide; and 7.0 percent aluminum powder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26695772A | 1972-06-28 | 1972-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3771453A true US3771453A (en) | 1973-11-13 |
Family
ID=23016690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00266957A Expired - Lifetime US3771453A (en) | 1972-06-28 | 1972-06-28 | Ammunition primer |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3771453A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167167A (en) * | 1984-11-13 | 1986-05-21 | Junghans Gmbh Geb | A detonation system |
| EP0461095A1 (en) * | 1990-06-06 | 1991-12-11 | Bofors AB | Improvements to primers |
| US10976144B1 (en) | 2018-03-05 | 2021-04-13 | Vista Outdoor Operations Llc | High pressure rifle cartridge with primer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US962888A (en) * | 1910-05-23 | 1910-06-28 | Winchester Repeating Arms Co | Primer for small-arm ammunition. |
| US1481872A (en) * | 1923-05-24 | 1924-01-29 | Charles H Miller | Projectili |
| US2970543A (en) * | 1954-09-13 | 1961-02-07 | Olin Mathieson | Ammunition |
-
1972
- 1972-06-28 US US00266957A patent/US3771453A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US962888A (en) * | 1910-05-23 | 1910-06-28 | Winchester Repeating Arms Co | Primer for small-arm ammunition. |
| US1481872A (en) * | 1923-05-24 | 1924-01-29 | Charles H Miller | Projectili |
| US2970543A (en) * | 1954-09-13 | 1961-02-07 | Olin Mathieson | Ammunition |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167167A (en) * | 1984-11-13 | 1986-05-21 | Junghans Gmbh Geb | A detonation system |
| EP0461095A1 (en) * | 1990-06-06 | 1991-12-11 | Bofors AB | Improvements to primers |
| US5157219A (en) * | 1990-06-06 | 1992-10-20 | Swedish Ordnance-Ffv/Bofors Ab | Primers |
| US10976144B1 (en) | 2018-03-05 | 2021-04-13 | Vista Outdoor Operations Llc | High pressure rifle cartridge with primer |
| US11609077B2 (en) | 2018-03-05 | 2023-03-21 | Vista Outdoor Operations Llc | High pressure rifle cartridge with primer |
| US12135198B2 (en) | 2018-03-05 | 2024-11-05 | Federal Cartridge Company | High pressure rifle cartridge with primer |
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