John Henry Warren

US Patent:

42429641, Jan 6, 1981

Filed:

Dec 18, 1978

Appl. No.:

5/970760

Inventors:

John B. Warren - Tustin CA
Ernest Y. Robinson - Altadena CA
Robert P. Kazanjy - Irvine CA

Assignee:

Ares, Inc. - Port Clinton OH

International Classification:

F42C 102

US Classification:

102275

Abstract:

A percussion type projectile nose fuse includes a generally conical fuse body having a cavity open only to the base thereof. Disposed within the cavity is a firing pin, a sleeve and a ball igniter. A fuse tip portion is defined by a weakened region, open to the fuse body exterior surface, which ruptures upon tip impact with a target, thereby causing at least partial rearward penetration of the tip into the cavity. Upon such tip penetration, the tip severs a flange on the firing pin by driving it against the sleeve, and propells the firing pin rearwardly along the sleeve and into engagement with the ball igniter. By forming the sleeve substantially longer than the length of the firing pin, a time delay before ignition, equal to the firing pin transit time, is provided. A forward opening recess formed in the apex of the tip, with a thin deformable wall thereabout, provides shock absorption so that accidental rupture of the weakened region does not occur during normal handling and loading of the projectile. The fuse is constructed of an aluminum alloy thereby permitting a relatively long fuse body to enhance the ballistic characteristics of an assembled projectile.