WO1995008748A1 - Balles d'arme a feu desintegrantes et cartouches les contenant - Google Patents
Balles d'arme a feu desintegrantes et cartouches les contenant Download PDFInfo
- Publication number
- WO1995008748A1 WO1995008748A1 PCT/CA1994/000521 CA9400521W WO9508748A1 WO 1995008748 A1 WO1995008748 A1 WO 1995008748A1 CA 9400521 W CA9400521 W CA 9400521W WO 9508748 A1 WO9508748 A1 WO 9508748A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- projectile
- bullet
- bismuth
- jacket
- piece element
- Prior art date
Links
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 30
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 3
- 238000004080 punching Methods 0.000 claims abstract description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052718 tin Inorganic materials 0.000 claims abstract 2
- 229910052725 zinc Inorganic materials 0.000 claims abstract 2
- 239000011701 zinc Substances 0.000 claims abstract 2
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000003380 propellant Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 229910052787 antimony Inorganic materials 0.000 claims 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims 1
- 230000003116 impacting effect Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000000981 bystander Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
- F42B12/74—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body
Definitions
- the present invention relates to improved projectiles including bullets for firearms, and cartridges including same.
- Jacketed bullets have an outer layer of copper or other material to prevent barrel damage or fouling.
- the cores of jacketed bullets often are made of lead to provide the bullet with acceptable ballistic properties.
- Lead core jacketed bullets can be made in "soft point” or “hollow point” to facilitate “mushrooming” of the bullet, and maximize its stopping power. Jacketed bullet cores also can be made of steel to provide the bullet with armor piercing capability.
- a projectile which comprises a frangible firearm bullet, at least a principal portion of which is formed of a one-piece element primarily made up of bismuth.
- a firearm cartridge comprising a casing, a propellant contained within the casing, means for igniting the propellant, and a frangible firearm bullet, at least a principal portion of which is formed of a one-piece element having a continuous all-metal structure containing bismuth.
- FIG. 1 is a partly schematic cross-sectional view of a firearm cartridge including a frangible, one-piece bullet containing bismuth according to one embodiment of the present invention.
- Fig. 2 is a partly schematic cross-sectional view of a frangible, one- piece, bismuth-containing shotgun slug according to another embodiment.
- Fig. 3 is a partly schematic cross-sectional view of a frangible, jacketed, bismuth-containing bullet according to still another embodiment.
- Fig. 1 illustrates a firearm cartridge including a casing 10 which can, for example, be made of brass. Within casing 10 is an explosive propellant in the form of powder 12. The propellant 12 is ignited by means of a primer 14 which is actuated when struck by the firing pin of a firearm (not shown).
- Bullet 18 held within neck 16 of casing 10 is a bismuth-containing bullet 18 according to one embodiment of the present invention. Bullet 18 shown in
- Fig. 1 is made in one piece with an all-metal continuous structure formed by any suitable method such as casting.
- the invention is also applicable to multi-piece frangible bullets, jacketed frangible bullets, and the like.
- bismuth is an excellent material for use in the manufacture of frangible firearm bullets of any useful size.
- the invention is applicable to bullets in the size range of from about .22 caliber up to about .50 caliber or higher for pistols and rifles, up to about 10 gauge slugs for shotguns, and up to about 16 inch for cannons.
- Fig. 2 shows a one-piece, bismuth-containing, frangible shotgun slug 19 according to one embodiment.
- the bullet 20 is made up of a frangible, one-piece, bismuth- containing core element 32 surrounded by a barrel groove-gripping soft jacket 24, which can be of any suitable metal or non-metal material such as copper.
- Soft jacket 24 improves accuracy at higher velocities by deforming into barrel rifling grooves.
- Jacket 24 is sufficiently thin so as to break apart on impact, e.g., less than about 1 mm and greater than about 0.1 mm, preferably about 0.5 mm or less. Exposure of nose 34 of bismuth-containing core 32 facilitates breakup of the jacketed bullet on impact.
- the bismuth-containing bullets in accordance with the present invention are formed by casting, spin molding, dropping, punching or in any other suitable manner, and can be made from substantially pure bismuth, or high bismuth content alloy.
- Bismuth also have an advantage in not being a precious metal. Bismuth can thus be used in substantially pure form, or alloyed with other non-precious metals, to form non-poisonous frangible bullets.
- frangible bullets according to the invention are primarily made up of bismuth.
- the bismuth-containing frangible bullets in accordance with the present invention contain at least about 90% bismuth by weight. In more preferred embodiments, the bismuth-containing frangible bullets contain at least about 92%, 94%, 96%, 98% or 99% by weight bismuth.
- High bismuth-content frangible bullets can be made to perform substantially as well ballistically as corresponding lead bullets.
- pure bismuth and nearly pure bismuth alloys are utilized to form brittle frangible bullets which readily break apart or shatter upon impact with a hard or rigid surface.
- the shattering causes the bullet to lose its energy. This greatly reduces dangerous ricochets and limits the bullet's ability to penetrate or pass through solid objects and harm unintended targets.
- frangible bullets in accordance with the present invention having a size from about .22 to about .50 caliber will shatter or fail to penetrate 1/16" mild steel sheet stock at angles greater than 45°, without substantial ricocheting.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Une balle désintégrante qui se pulvérise à l'impact est composée de Bi. Le bismuth peut constituer un alliage avec l'étain, l'antimoine ou le zinc. Le bismuth peut être présent dans les proportions suivantes: au moins 90 %, au moins 95 %, au moins 98 %, ou au moins 99 %. La balle comporte une chemise de Cu d'une épaisseur inférieure à 1 mm et supérieure à 0,1 mm, en particulier d'une épaisseur de 0,5 mm. Le procédé de fabrication consiste à former la balle par coulée, moulage centrifuge, estampage ou poinçonnage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU77359/94A AU7735994A (en) | 1993-09-20 | 1994-09-20 | Frangible firearm bullets and cartridges including same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12309593A | 1993-09-20 | 1993-09-20 | |
| US08/123,095 | 1993-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995008748A1 true WO1995008748A1 (fr) | 1995-03-30 |
Family
ID=22406690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CA1994/000521 WO1995008748A1 (fr) | 1993-09-20 | 1994-09-20 | Balles d'arme a feu desintegrantes et cartouches les contenant |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU7735994A (fr) |
| WO (1) | WO1995008748A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257149B1 (en) | 1996-04-03 | 2001-07-10 | Cesaroni Technology, Inc. | Lead-free bullet |
| WO2002086412A1 (fr) | 2001-04-24 | 2002-10-31 | Anthony Joseph Cesaroni | Projectiles sans plomb |
| US9170080B2 (en) | 2013-03-15 | 2015-10-27 | Alliant Techsystems Inc. | Reloading kit with lead free bullet composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992008097A1 (fr) * | 1990-10-31 | 1992-05-14 | Brown John E | Balles d'armes a feu sans plomb et leurs cartouches |
-
1994
- 1994-09-20 WO PCT/CA1994/000521 patent/WO1995008748A1/fr active Application Filing
- 1994-09-20 AU AU77359/94A patent/AU7735994A/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992008097A1 (fr) * | 1990-10-31 | 1992-05-14 | Brown John E | Balles d'armes a feu sans plomb et leurs cartouches |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257149B1 (en) | 1996-04-03 | 2001-07-10 | Cesaroni Technology, Inc. | Lead-free bullet |
| WO2002086412A1 (fr) | 2001-04-24 | 2002-10-31 | Anthony Joseph Cesaroni | Projectiles sans plomb |
| US7607394B2 (en) | 2001-04-24 | 2009-10-27 | Anthony Joseph Cesaroni | Lead-free projectiles |
| US9170080B2 (en) | 2013-03-15 | 2015-10-27 | Alliant Techsystems Inc. | Reloading kit with lead free bullet composition |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7735994A (en) | 1995-04-10 |
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