Accession Number : ADD018673

Title :   Trimode Fuze

Descriptive Note : Patent application, filed 14 Feb 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Brown, Robert G ; Wong, Jeffrey A ; Sorathia, Usman A ; Caplan, Ivan L

PDF Url : ADD018673

Report Date : 14 Feb 1997

Pagination or Media Count : 19

Abstract : A trimode fuze is provided which comprises a combination of a standard dual mode fuze with the addition of a void sensing mechanism. The modified fuze provides detonation of a warhead under three distinct scenarios: impact upon a hard target with detonation caused by the deformation of the warhead, displacing the hard target firing pin, penetration and continuous deceleration within a solid target with detonation caused by the expiration of a penetration delay timer, and penetration of a soft target with detonation caused by the transition from a target impact deceleration to the lower preset deceleration threshold. The first two modes of detonation are similar to those found in prior art dual mode fuzes. The third mode is brought about when target impact deceleration causes compression of a spring. As the spring compresses, steel balls slide out of a locking mechanism. Once said deceleration reduces below a preset threshold, an additional set of steel balls is released, which allows the spring loaded firing pin to impact on the detonator.

Descriptors :   *PATENT APPLICATIONS, *EXPLOSIVES, *FUZES(ORDNANCE), THRESHOLD EFFECTS, DEFORMATION, PENETRATION, DUAL MODE, DECELERATION, TIMING DEVICES, HARDENED STRUCTURES, DETONATORS, LOCKING(MECHANICS), FIRING PINS

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE