Accession Number : ADD004564
Title : Dual Channel Redundant Fuze.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C
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