US1031320A - Projectile. - Google Patents

Description

J. H. BROWN.

PRQJEGTILE. APBLIGAIION FILED DEG13,1910.

v To all whom it may concern:

UNITED STATES PA FFQ,

JOHN H. BROWN, OF WEST HOBOKEN, JERSEY.

PROJEGTI LE.

Specification of Letters Patent.

Patented July 2, 1912..

Application filed December 13, 1910. Scrial'No, 597,074.

Be it known that I, JOHN H. Brown, a

citizen of the United States, and resident of Vest Hoboken, in the county of Hudson and State of'New Jersey, have invented a new and useful Improvement in Projectiles, of

- which the following is a specification.

My invention relates to projectiles with the-object in which will prevent the escape of hotgases A' practical embodiment of the invention 1s represented 1n the accompanying drawings in which,

' Figure 1 is a View of a portion of a gun the front portion of the chase in proximity thereto, in section; a projectile forming the subject-matter being shown in side elevation located in the barrel in ,positionfor firing. 2 is a view of the projectile in longitudinal section, and Fig. 3 is a view of the projectile rear elevation. The powder chamber is denoted by 1, the ered forward end of the powder chamber barrel including my '2, a smooth bore portion of the chase in which the pro ectile is seated, by 3, 'and the rifled portion of the chase by 4:.

The body of the projectile is denoted by 5, and may be of any well known or approved form save only as it is modified'at erably the heel for the attachment thereto of the parts to be hereinafter described.

" At a point intermediate of its length, prefnear its heel end, the body of the projectile is'reduced to receive a rotating band 6. I preferably make this band broad and provide it with grooves 7 extending around'its periphery. The rear end of the projectile 5 has attached thereto, in the present instance by several screws 8, a disk 9 of some suitable tough elastic material,

such, for example, as hard or vulcanized fiber, the thickness of said disk preferably being about one-sixth the diameter of the body of the projectile. For instance, if the projectile be six inches in diameter, the thicknessiof the disk 9 would preferably be one inch. The central portion of the disk 9 is'ourved rearwardly, as shown at 10, so as to form between the face of the disk and the heel'end of the projectile, a chamber 11 fgr View of providing a projectile slope 2 and compressed so prevent the gases fromescaping past it.

of the present invention- This chamber 11 preferably communicates through radial channels 12, with" an annular 13. on the periphery of the disk 9.

In operation, when the explosive charge in the powder chamber 1 is exploded, its pressure will-tend to flatten the central part 10 of the disk 9, and thereby force the lubricant through the channels 12 to the groove 13 and hence to the interior surface of the chase of the gun and at the same time the tough elastic disk 9 will be forced along the as to efi ectually As the-projectile travels along the chase toward the muzzle end, any slight opening between the lands of the rifled portion 4 of the chase andcthe'rotating band 6 due to attrition between the faces of the lands and thenon-elastic rotating band will be completely shut off from the gases resulting from theexplosive charge by the tough elastic disk 9, the elastic nature of said disk being suflicientto cause the disk to expand from its compressed. condition to an extent as great or greater than any wear which may take place between it, the tough elastic disk, and the interior of. the chase. Furthermore, as the tough elastic disk is located at the extreme rear end of the projectile, the gases will not be allowed to escape between the and any portion of interior of the chase the projectile since .the said gases will be completely held back from such escape until the disk 9 leaves the muzzle.

lVhile I have shown the body of the projectile 5 as solid, it is obvious that it may be a-shell as well as a solid shot, and further -I do not wish to limit myself to any particular thickness of the elastic disk at the heel end of the projectile, nor to the radial passages leading from the lubricant chamher to the exteriorof the disk, as the said lubricant may be forced outwardly between the inner face. of said disk 9 and the heel end of theprojectile.

What I claim is:

1. A projectile provided with a disk of tough elastic material secured to its rear end and a rotating band of soft metal seated on the projectile, the said disk of elastic material having a diameter greater than the diameter of the projectileincluding the soft metal rotating band.

2. A projectile provided fwlth a dlsk of groove i lprsvlded 1th radial channels leading from i wltnessesz tough elastic mateiial secured to the rar as my invention, I' have signed my nam in end 01 the. projec 1e and shaped to form a presence of two witnesses, this twelfth day lubricant chgunb 7 between the disk and the vof December, 1910. rear end 'of the ietile, the said disk being JOHN 1-1, BROWN.

the sai i chamber lo its periphery.

F. GEORGE BARRY, .In testnnony, that I 21211111 the fnregoing HENRY C; THIEME.

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