US587342A

US587342A - Lubricated bullet

Info

Publication number: US587342A
Authority: US
Publication date: 1897-08-03
Anticipated expiration: 1914-08-03

Description

{No Model.}

S. O. STEWARDSON.

LUBRIOATED BULLET.

No. 587,342. Patented Aug. 3,1897.

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UNITED STATES PATENT FFLCEE.

SAMUEL CLINTON STEWVARDSON, OF SANTA ANNA, TEXAS.

LUBRICATED BULLET.

SPECIFICATION forming part of Letters Patent No. 587,342, dated August 3, 1897.

Application filed December 24, 1896. Serial No. 616,894. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL CLINTON STEW- ARDSON, a citizen of the United States, residing at Santa Anna, in the county of Coleman and State of Texas, have invented certain new and useful Improvements in Bullets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in bullets for rifled firearms.

It is a well-known fact that when an ordinary rifie has been fired a dozen or more times the inner surface thereof becomes foul and dry, destroying the accuracy of the arm and requiring the same to be frequently wiped out and cleaned. In order to overcome this objection and to prevent the rusting of the. inside of the barrel, I have devised an improved form of bullet, the same consisting of a lead projectile of proper size having an opening leading into the rearend thereof and terminating at a point adjacent to the center of the projectile, a laterally-disposed opening extending entirely through the projectile, and a recess or cavity upon the outer surface thereof located at a point near its rear end, the upper edges of said recess being curved downwardly from two opposite points, forming stops.

The invention is clearly illustrated in the accompanying drawings, in which- Figure 1 represents a side elevation of a bullet constructed according to my invention. Fig. 2 is a similar view taken at right angles to Fig. 1. Fig. 3 is a vertical longitudinal section, and Fig. 4 is a cross-section through the laterally-extending opening.

Like reference-numerals indicate like parts in the difierent views.

The bullet 1 is made of any suitable size and shape and has an opening 2, extending longitudinally thereof, leading from the rear end of the bullet and terminating at a point adjacent to its center. The said bullet is also provided with a transversely-extending opening 3 and has an external recess or cavity 4: thereon, which extends entirely around the outer surface of the bullet, as clearly shown. The lower edge of the cavity at is bounded by a circular line which lies in a plane at right angles to the axis of the bullet, and the upper edge of said cavity is bounded by curved lines which extend downwardly from the outer end of the opening 3, forming lateral stops 5, as clearly shown.

The

openings

2 and 3 and the cavity 4 are filled with heavy grease or other lubricant, and when the same is discharged from the cartridge the said grease is expelled from the bullet, coating the inner surface of the barrel of the ride wi'h a thin film of oil. The stops 5 5 serve to prevent the grease contained in the cavity 4 from being expelled all at once during the rotation of the bullet in passing from the barrel of the ride from which it is discharged.

Actual practice he s demonstrated the fact that a rifle may be fired an almost indefinite number of times without becoming dry and foul and destroying the accuracy of the same. Furthermore, by the use of bullets constructed according to my invention the inner surface of the barrel is at all times coated with grease or oil, preventing the rusting thereof. The necessity for the constant cleaning of the barrel is thereby obviated. I have found that ordinary beef-tallow is the most effective lubricating material with which to fill the

openings

2 and 3 and the cavity.

I am aware that lubricating-bullets have been employed heretofore with a central longitudinal opening, a transverse opening leading outward therefrom, and with an external groove into which said transverse opening leads. In all such cases, however, the sides of the external groove or recess are parallel, and it has been found that when the bullet is ejected from the rifle there is danger of the grease contained in said external recess being lifted bodily and applied at one point only. By the formation of the stops 5 5 I obviate this difficulty and provide means whereby the grease contained in the cavity will be expelled little at a time throughout the entire length of the barrel.

Having now described the invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A bullet having a cavity or recess upon its outer surface whose upper edges are curved downwardly from two opposite points forming stops, substantially as and for the purpose described.

2. A bullet having a longitudinally-extending opening in its rear end terminating at a point adjacent to the center thereof, a laterallyextending opening leading outwardly from the end of said longitudinal opening, and a recess or cavity in its outer surface, the upper edges of said cavity being curved rear- 1 o wardly from the ends of said laterally-extending opening, substantially as and for the purpose described.

In testimony whereof I have signed this specification in the presence of tWo subscribing witnesses.

SAMUEL CLINTON STE WARDSON.

Witnesses S. D. HARPER, J. D. HOLT.