Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-02-28
1998-04-21
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340620, 340627, 200 6109, 73 10, 324204, 324219, 324511, G08B 1700
Patent
active
057422346
ABSTRACT:
Apparatus for monitoring particles in fluid systems in which a detector has electrical contacts that are bridged by particles captured from suspension in the fluid. Upon detection of a particle, a control microprocessor stores a predetermined quantity of electrical energy on a capacitor, which is then discharged through an inductor to burn off the particle at the detector. The burn-off charge and return lines from the charge storage capacitor are un-grounded, and are connected by respective electronic switches through relay contacts to the conductors connected to the chip detector. The relay contacts are also connected to the inputs of a differential amplifier for detecting presence of a chip bridging the detector contacts and monitoring continuity of the conductors to and from the detector. The relay is powered by system voltage, and in the event of system power failure connects the chip detectors directly to warning lamps on an operator panel.
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Hofsass Jeffery
Lieu Julie B.
Vickers, Inc.
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