SELECTIVE ULTRAVIOLET SIGNAL AMPLIFIER CIRCUIT

A flame detection circuit means that is responsive to an ultraviolet responsive tube is provided with a safety circuit. The safety circuit encompasses a pulse responsive circuit that is responsive to the characteristic conduction pattern of an ultraviolet responsive type of tube and will not respond...

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Bibliographic Details
Main Author LANDIS, WILLIAM R
Format Patent
LanguageEnglish
French
Published 08.05.1984
Edition3
Subjects
ALARM SYSTEMS
BLASTING
COLORIMETRY
COMBUSTION APPARATUS
COMBUSTION PROCESSES
HEATING
LIGHTING
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
MECHANICAL ENGINEERING
ORDER TELEGRAPHS
PHYSICS
RADIATION PYROMETRY
REGULATING OR CONTROLLING COMBUSTION
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
WEAPONS
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Summary:A flame detection circuit means that is responsive to an ultraviolet responsive tube is provided with a safety circuit. The safety circuit encompasses a pulse responsive circuit that is responsive to the characteristic conduction pattern of an ultraviolet responsive type of tube and will not respond to a shunt resistance. The circuit relies on the normal conductivity of a shorting field effect transistor that must be gated into a nonconductive state for an output means to be activated.
Bibliography:Application Number: CA19810387077