Dual channel redundant fuze

Details Dual channel redundant fuze Dual channel redundant fuze

1975-07-11

1977-01-11

Pendegrass, Verlin R.

Ammunition and explosives

Igniting devices and systems

102 81, F42C 1104

Patent

active

040021238

ABSTRACT:
A redundant two-channel electromechanical fuze. The fuze contains two airiven turbines which, in turn, drive independent electrical alternators, the shafts of which drive governors that regulate constant speed gear-reducing assemblies. The latter assemblies rotate independent detonator-containing rotors from a safe in-line position to a fully armed position. 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.

REFERENCES:
patent: 2468120 (1949-04-01), Senn
patent: 3332642 (1967-07-01), Halling
patent: 3757695 (1973-09-01), Fisher
patent: 3804020 (1974-04-01), Norton

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