Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-05-30
1998-06-30
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340626, 116268, 73721, 73746, G08B 2100
Patent
active
057740569
ABSTRACT:
An indicating device includes a housing that is separated into two sub-chambers by a flexible diaphragm. A indicating member is carried by the diaphragm so that the diaphragm and the indicating member move, within the housing, responsively to changes in the pressure of the air flowing through an air intake system caused by restrictions in or clogging of the air intake filter. The indicating device incorporates an electromechanical sensor for monitoring the position of the diaphragm and producing an output signal responsive thereto. In one embodiment, the sensor is a potentiometer which produces an output signal which varies continuously between a first value when the diaphragm is at its unrestricted position and a second value when the diaphragm is at its restricted position. In a second embodiment, the sensor includes a switching circuit which produces a switched output signal which varies between at least three states corresponding to three different diaphragm positions.
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Berry, III Charles Henry
Ferris Gregory Matthew
Forry James Nathan
Manross Jerry Lee
Stoll Thomas Alan
Engineered Products Co.
Hofsass Jeffery
Tweel , Jr. John
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