Projectile
No. 863,248
Specification of Letters Patent. Patented Aug. 13, 1907.
Application filed December 10, 1906, Serial No. 347,055
To all whom it may concern:
Be it known that I, Carlos de Zafra, a citizen of the United States, residing at New York city, county of New York, and State of New York, have invented certain new and useful Improvements in Projectiles, of which the following is a specification.
My invention, relates to an improved form of explosive shell or other projectile, and more particularly to those projectiles which are reinforced by longitudinal ribs.
It further relates to a method whereby such a projectile may be made.
The object of my invention is to provide a shell having a maximum strength or perforating power, together with a maximum capacity for an explosive charge, and the invention consists in forming the projectile with the fibers or grain of the metal running in a spiral direction from the base of the shell to the top thereof, and in reinforcing the interior of the shell with ribs which shall run in the same direction, starting at the base of the projectile and ending at the top end of the inner chamber.