The Development of Armor-piercing Shells Part 4
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Having described my invention what I claim is:
1. A projectile provided with a chamber extending along its length, the walls of said chamber being provided with longitudinal ribs extending in a spiral direction from the base of the chamber to the forward end thereof.
2. A projectile provided with a chamber extending along its length, the forward end of said chamber being pointed, the walls of said chamber being provided with longitudinal ribs extending in a spiral direction from the base of the chamber to the point thereof.
3. A projectile having the fibers of its material twisted in a spiral direction from the base of said projectile to the end thereof.
4. A projectile having the fibers of its material twisted in a spiral direction from the base of said projectile to the end thereof, said projectile having a central chamber, the walls of which are provided with longitudinal ribs extending in a spiral direction from the base of the chamber to the point thereof.
In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses, this sixth day of December, 1906.
CARLOS DE ZAFRA.
Witnesses:
EMILO BELARI, EMMA RODERICK.
Bibliography
ORDNANCE AND GUNNERY BRUFF
TEST BOOK OF ORDNANCE AND GUNNERY INGERSOLL
REPORT ON THE ART OF WAR IN EUROPE--1854-1855-1856 COL. R. DELAFIELD, U.S.A.
JOURNAL OF THE U.S. ARTILLERY
THE SCIENTIFIC AMERICAN
SPECIFICATIONS OF THE BUREAU OF ORDNANCE, U.S. NAVY DEPARTMENT
SPECIFICATIONS OF THE ORDNANCE DEPARTMENT, U.S. ARMY
[Ill.u.s.tration: The de Zafra Improved Armor-Piercing Sh.e.l.l]
The Development of Armor-piercing Shells Part 4
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The Development of Armor-piercing Shells Part 4 summary
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