The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 1977
Filed:
Jul. 11, 1975
Evan D Fisher, Chevy Chase, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
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.