US686637A

US686637A - Projectile.

Info

Publication number: US686637A
Application number: US3109900A
Authority: US
Inventors: Archibald J Robertson
Original assignee: ALFRED C REX
Current assignee: ALFRED C REX
Priority date: 1900-09-25
Filing date: 1900-09-25
Publication date: 1901-11-12
Anticipated expiration: 1918-11-12

Description

No. 386,637. Patented Nov. I2, 961.

A. J. ROBERTSON.

PROJEGTILE.

(Application filed Sept. 25, 1900., (No HodaL) WITNESSES IN VENTOI? Y is 1-1 fir- 1 Ni i E i ATIES ARCHlSnl-D 0F GHQ-ll! Li TO ALFR-LD (l. REX, OF PHILADELPHXA, PENNSYLVANIA.

#SEECIEICATXGN forming 399.1. ot' Iiretters Patent No. 686,637, dated November 12, 19m. Application filed September 25, 1900- Serial No. 31,099. (No mudelJ To all whom it may concern:

Be it known that I, ARCHIBALD J. Bonner- SON, a. subject of the Queen of GrectBritain, and e. resident of the city and county of Philadelphia. end State of Pennsylvcnizt, have invented certain new and useful In] provouieuts in Projectiles, of which the following is 2i specificetion.

This invention relates to projectiles for use in warfare; and it consists in certain-peculiarities of the construction, novel arrangencnt, and operation of its parts, as will be ing nh'lity of the projectiles and causing the points to drop in it molten mess. it is therefore the principal object or" my invention to prevent this nieitingof the points of the pro jcctilcs em give them a maximum piercing ability by providing the points of the projcctiles with out g edges, so that the inipact immediately lesions the projectile to the plate, tl us securing to t is projectile all the elements of (iostructionnau1ely, the footscconds velocity and the rotary motion.-- irhcrebv when th i npnct occurs the projectile isiui stolyfzistencd sndinipnrts motionto the pic egv' iiethertiie rojeciile strikes the defensive object or plate at right angle or an conic angle, it obvious that a projectile constructed sccor..ing to my invention would engage the plate, while a smoothpointcd projectile would glance therefrom.

o the accompanying drawings, e'" in elevation the pointed I i bodying my invention. VlOW oi the projectile which fills the e L tire on .1 Y end Fig. is with the grooves in t is tired and D is a. hand, preferably of copper, such {LS is commonly used to impart rot-cry motion to projectiles.

In order to accomplish the purposes of my invention, 1 provide two or more cutting edges B on the pointed end of the projectile, which is done by depressing the material of which the projectile is composed on lines which begin at the extreme point of the projoctiie and from said point extend rcarwardly in helical or spirallycurved lines until the extreme clismcterof the projectile is reached. On one side of each of these lines the solid metal of the projectile is reduced ton dooth sufiicicnt to form an edg'cnud turnish a clear ance for the chips cut out of the object being pierced. These depressions begin at the inner portion of the cutting edges and extend to the outer portion of the next or adjecent cutting edge, thus forming cutting edges backed up by solid walls, furnishing great power of resistance. Nhen the point of the projectile is thus finished, it is then tempered to a maximum degree of hardness.

These cutting edges are not employed for the purpose of giving rotary motion. to the projectile when passing through the air, but for the purpose oi engaging the plate in order to iii: the projectile therein as soon as it strikes the object of resistance, and the projectile may receive its rotary motion through the medium of it ride-bored gun. As is Well known, projectiles discharged from guns of thc-obove'nnmed character rotate from left to right, and I therefore form the cutting edges so that their faces will he presented in the direction in which the projectile is rotated, thus causing the projectile to pose trcte the surface of the ploteond. fasten itself therein, thus delivering to the pinto through the projectile the concentrated eiicct of im- 2 eeeeev pact-pressure, rotary motion, and vibration, ting edges formed by depressing the matethe concentration of all its elements of de riel in front thereof said depressions beginsti'uction. ning at the inner portion of one of the cut- Heving thus fully described my invention, ting edges and. extending to the outer por- 5 what I claim as new, and desire to secure by tion of the adjacent cutting edge, substan- 15 Letters Patent, istielly as described.

A pointed projectile having cutting edges ARGHIBA'LD RGBERTSON. extending helically oi spirally from the ex- "Witnesses: trenie point rearwerdly to the extreme cliem- CHAS. M. RHODES, 1o eter of the body of the projectile, said cut- ALFRED G. REX.