US1080976A - Mushroom-bullet. - Google Patents

Mushroom-bullet. Download PDF

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Publication number
US1080976A
US1080976A US78960313A US1913789603A US1080976A US 1080976 A US1080976 A US 1080976A US 78960313 A US78960313 A US 78960313A US 1913789603 A US1913789603 A US 1913789603A US 1080976 A US1080976 A US 1080976A
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United States
Prior art keywords
bullet
jacket
mushroom
metal
core
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
Application number
US78960313A
Inventor
Thomas C Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Winchester Repeating Arms Co
Original Assignee
Winchester Repeating Arms Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Winchester Repeating Arms Co filed Critical Winchester Repeating Arms Co
Priority to US78960313A priority Critical patent/US1080976A/en
Application granted granted Critical
Publication of US1080976A publication Critical patent/US1080976A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F42B12/34—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type

Definitions

  • FIG. 1 a view in side elevation of a mushroom bullet constructed in accordance with my invention, a portion of the jacket being broken away toexpose the core which is shown in section.
  • Fig. 2 a corresponding view of a modified form which the invention may assume.
  • My invention relates to an improvement in mushroom bullets of the class in which a soft metal core is inclosed in a relatively hard sheet-metal jacket, the object being to produce a bullet of superior performance in the matter of mushrooming.
  • the one-piece sheet-metal jacket is virtually divided into a tip, 2, and a body, 3, by the formation of a downwardlypitched circumferential groove, 4, by which the metal of the-jacket is stretched and reduced in thickness and thus weakened.
  • the head, 5, thus formed upon the inside of the jacket is, of course, embedded in the soft ,metal, 6, of the core which is entirely inclosed by the said jacket.
  • the jacket will be grooved as described preparatory to the swaging operation though that is not essential to my invention. I conceive that the groove may be partly formed before the swaging operation and partly formed during the same.
  • the said circumferential groove 4 is located in the tapered forward end of the bullet well be- 7 yond the point where the cylindrical portion thereof merges into the tapering portion thereof. At the time of impact, the jacket breaks down where so weakened, and so much of the core as is contained within the tip is jammed down into the main body of the bullet with the effect of disrupting and mushrooming the same.
  • the sheet-metal jacket is virtually divided into a tip, 2, and a body, 3, by means of a circumferential band of downwardly extending indentations, 7, which stretch and weaken the metal of the jacket and prepare it to be broken on the impact of the bullet,
  • a sharp-nosed mushroom bullet having a soft metal core, and a sheet-metal jacket entirely inclosing the said core,
  • a sharp-nosed mushroom bullet having a soft metal core, and a sheet-metal jacket entirely inclosing the said core, tapered at its forward end to a point and formed in its tapered forward portion with a circumferential downwardly inclined groove extending into the soft metal core of the bullet, the metal of the jacket being stretched and weakened in the groove, whereby it initially breaks down in the neighborhood of the groove and facilitates the mushrooming of the bullet.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Description

T. G. JOHNSON.
MUSHROOM BULLET.
APPLICATION FILED SEPT. 13, 1913.
1,080,97 6. Patented Dec. 9, 1913.
coumuu PLANOGRAPH 1:41., WASHINGTON. 0. c4
uinrizn s-rrkrns PATENT :orrron.
THOMAS C. JOHNSON, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T0 WINCHESTER REPEATING ARMS CO, OFNEW HAVENQCONNECTICUT, A CORPORATION.
, MUSHROOM-BULLET.
Specification of Letters Patent.
Patented Dec. 9,1913.
Application filed September 13, 1913. Serial No. 789,603.
To all whom it may concern: 7
Be it known that I, THOMAS C. JOHNSON, a citizen of the United States, residing. at Newliaven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Mushroom- Bullets; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-
Figure 1, a view in side elevation of a mushroom bullet constructed in accordance with my invention, a portion of the jacket being broken away toexpose the core which is shown in section. Fig. 2, a corresponding view of a modified form which the invention may assume.
My invention relates to an improvement in mushroom bullets of the class in which a soft metal core is inclosed in a relatively hard sheet-metal jacket, the object being to produce a bullet of superior performance in the matter of mushrooming.
In carrying out my invention as shown in Fig. 1, the one-piece sheet-metal jacket is virtually divided into a tip, 2, and a body, 3, by the formation of a downwardlypitched circumferential groove, 4, by which the metal of the-jacket is stretched and reduced in thickness and thus weakened. The head, 5, thus formed upon the inside of the jacket is, of course, embedded in the soft ,metal, 6, of the core which is entirely inclosed by the said jacket. By preference the jacket will be grooved as described preparatory to the swaging operation though that is not essential to my invention. I conceive that the groove may be partly formed before the swaging operation and partly formed during the same. The said circumferential groove 4 is located in the tapered forward end of the bullet well be- 7 yond the point where the cylindrical portion thereof merges into the tapering portion thereof. At the time of impact, the jacket breaks down where so weakened, and so much of the core as is contained within the tip is jammed down into the main body of the bullet with the effect of disrupting and mushrooming the same.
In the construction shown by Fig. 2, the sheet-metal jacket is virtually divided into a tip, 2, and a body, 3, by means of a circumferential band of downwardly extending indentations, 7, which stretch and weaken the metal of the jacket and prepare it to be broken on the impact of the bullet,
I claim v 1. A sharp-nosed mushroom bullet having a soft metal core, and a sheet-metal jacket entirely inclosing the said core,
tapered at its forward end to a point and formed in its tapering forward portion with a downwardly inclined indentation struck from the outside of the jacket and entering the core and weakening the jacket so that it breaks downin the neighborhood of the indentation.
2. A sharp-nosed mushroom bullet having a soft metal core, and a sheet-metal jacket entirely inclosing the said core, tapered at its forward end to a point and formed in its tapered forward portion with a circumferential downwardly inclined groove extending into the soft metal core of the bullet, the metal of the jacket being stretched and weakened in the groove, whereby it initially breaks down in the neighborhood of the groove and facilitates the mushrooming of the bullet.
In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.
THOMAS C. JOHNSON. lVitnesses:
' HARVEY W. GRoEsBnoK,
HARRYL. ORooKE'r'r.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.
US78960313A 1913-09-13 1913-09-13 Mushroom-bullet. Expired - Lifetime US1080976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US78960313A US1080976A (en) 1913-09-13 1913-09-13 Mushroom-bullet.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78960313A US1080976A (en) 1913-09-13 1913-09-13 Mushroom-bullet.

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US1080976A true US1080976A (en) 1913-12-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070028793A1 (en) * 2003-09-10 2007-02-08 Jean-Claude Sauvestre Hunting bullet with reduced aerodynamic resistance
US11268791B1 (en) 2014-05-23 2022-03-08 Vista Outdoor Operations Llc Handgun cartridge with shear groove bullet
US11486683B2 (en) * 2021-04-06 2022-11-01 Joseph Cziglenyi Angled dual impact bullet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070028793A1 (en) * 2003-09-10 2007-02-08 Jean-Claude Sauvestre Hunting bullet with reduced aerodynamic resistance
US7814837B2 (en) * 2003-09-10 2010-10-19 Jean-Claude Sauvestre Hunting bullet with reduced aerodynamic resistance
US11268791B1 (en) 2014-05-23 2022-03-08 Vista Outdoor Operations Llc Handgun cartridge with shear groove bullet
US11486683B2 (en) * 2021-04-06 2022-11-01 Joseph Cziglenyi Angled dual impact bullet

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