Accession Number : ADD004564

Title :   Dual Channel Redundant Fuze.

Descriptive Note : Patent,


Personal Author(s) : Fisher,Evan D

Report Date : 11 Jan 1977

Pagination or Media Count : 8

Abstract : This patent describes a redundant two-channel electromechanical fuze. The fuze contains two air-driven turbines which, in turn, drive independent electrical alternators, the shafts of which drive governors that regulate constant speed gear-reducing assemblies. The output from the electrical alternators are fed to electronic timing circuits via a novel barometric sensing switch element. The barometric element includes a pressure sensitive diaphragm for closing a pair of contacts to connect the alternator output to the timing circuit only after the fuzed projectile has experienced a predetermined minimum free fall distance. The barometric sensing switch element housing further comprises a second diaphragm which, when activated by ram air, serves to unlock the turbine wheels for rotation, while simultaneously establishing a reference pressure for the first diaphragm. The fuze circuits include redundant impact/shock switches as well as delay functions which are cross-coupled to one another to ensure high reliability.

Descriptors :   *Patents, *Fuzes(Ordnance), Dual channel, Redundancy, Electromechanical devices, Pressure switches, Delay circuits, Safety and arming(Ordnance)

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE