US1080976A - Mushroom-bullet. - Google Patents

Description

T. G. JOHNSON.

MUSHROOM BULLET.

APPLICATION FILED SEPT. 13, 1913.

1,080,97 6. Patented Dec. 9, 1913.

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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.

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