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Publication numberUS517560 A
Publication typeGrant
Publication dateApr 3, 1894
Publication numberUS 517560 A, US 517560A, US-A-517560, US517560 A, US517560A
InventorsM. Ashley
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 517560 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

'I (-o Model.)



l No. 517,560. Patented Apr,.-3,-1894.


figli INVENTOH i530. ArrH/VEY. I


PROJ Ecrit-7E.

SPECIFICATION forming part of Letters Patent N0. 517,560, dated April 3,1894.

Application iiled February 29,1892. Serial No. 423,109. (No model.)

To all whom t may concern.-

Be it known that I, FRANK M. ASHLEY, citizen vof the'United States, residing in Hawthorne, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Projectiles, of which the following is a specification.

This invention relates to a projectile constructed with an axial passage extending en'- tirely through it and closed at its rear end by a cap looselyitted thereto, so as to be thrown off by the force of -the air vpassing through the projectile, after'the latter is discharged, whereby the projectile will travel with less -re- `sistance, greater speed and distance, and in a straight course.

The invention has for its-object to provide an improved projectile of this character, as hereinafter described andclaimed.

The invention consists of the construction hereinafter described and claimed.

In the accompanying drawings: vFigure 1 is a longitudinal section of the projectile comprehending my invention. Fig. 2 is an exterior view of the same projectile, and Fig. 3 is a detail.

The .projectile is providedY with an axial passage extending entirely througn it. The object of this passage is to enable me to make the heaviest possible' projectile of a given length which will meet with the smallest resistance of the air. A further object of the passage is to direct the flight of the projectile. Vhen the projectile is inserted into the gun for tiring the rear end which receives the force of the explosion is covered with a cap,

which is loosely applied to the projectile and is sufficiently strong to withstand the force of the explosion. When'the projectile leaves the gunthe pressure of the air through ',the axial passage forces the cap olf from the end of the projectile and thus provides an uninterrupted passage for the air, which materially reduces the vresistance thereof.

Referring to the drawings by letter, a represents the body of the projectile, b represents the axial passage through it and c represents the cap over the rear end of the projectile. Y

In ordento secure additional accuracy in 5e the flight ofa projectile and to dispense with the rifling of the gun barrel, I propose to make the forward end of the passage bellshaped and to form spiral ribs b thereon. Whenthe air rushing through the axial pas- 5 5 sage during the flight of the projectile, strikes these spiral formations it will cause the projectile to rotate on its axis and thereby iny sure a straight course.

In Fig. l the passage b is shown lined with 6o a tube d which has acutting edge and iiange projecting from the forward end to strenghten the projectile when the body'is made of softer material, such -as lead, and also to enable the projectile to pierce refractory substances against which it is directed. This lining may be provided with the ribs or grooves as shown in Fig. 3, to impart the rotary movement to the projectile.

Having thus described my invention, I 7o clairnl. A cylindrical projectile having an 'axial passage extending entirely through it, au open ended tube" fitting said passage and havinga bell-shaped rifled mouth at its forward end.

2. A cylindrical projectile'having an axial passage extending entirely through it and made of soft material, such as lead,anda1in ing tube of harder material than the body of the projectile and having its forward end re- 8c inforced for the purpose described. In witness whereof I have hereunto signed my name in the presence of `tw'o subscribing witnesses. v FRANK M. ASHLEY.A



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2433334 *Jan 11, 1944Dec 30, 1947Forstner Birkeland LeighAmmunition
US3063376 *Nov 12, 1959Nov 13, 1962Baden Powell EdwardSlug for shotgun
US4627357 *Sep 27, 1984Dec 9, 1986Pranas GobisAmmunition projectile
US5471719 *May 10, 1993Dec 5, 1995Sawyers; William L.Air gun pellet forming method
US7222573Mar 29, 2006May 29, 2007Pontieri James MAerodynamic air gun projectile
Cooperative ClassificationF42B10/30