US Government As Represented by the Secretary of the Army

Evan D Fisher

Carl J Campagnuolo

Stacy E Gehman

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.

Dual channel redundant fuze

An environmental safety device for a fuzed bomb which is prevented from bg actuated until both the bomb has been positively released from the aircraft and has separated a predetermined distance from the bomb rack. The device comprises a spring-actuated air valve, which when released, extends from the charging well of the bomb such that an inlet port is placed in the slipstream of air flowing thereby. The slipstream is directed via a flexible conduit to an air-actuated fuze located in the nose of the bomb. An exhaust tube encircles the inlet tube so as to direct the exhaust air back through the valve outlet port. A preferred embodiment employs a high performance, point detonation dual channel redundant fuze.

Air valve safety device for bomb fuzes

The transmitter for an A.C. capacitance proximity fuze consists of an A.C. enerator whose output is directly connected to the transmitter probes of an A.C. capacitance fuze. The A.C. generator may be either a wind driven alternator or a fluid oscillator power supply driven by the ram pressure of the air. This arrangement eliminates the need for a separate oscillator as the power supply is now also the transmitter.

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Chevy Chase, MD, United States of America

Evan D Fisher