Gas separation: apparatus – With signals – indicators – measuring – or testing means
Patent
1998-01-12
1999-06-29
Smith, Duane S.
Gas separation: apparatus
With signals, indicators, measuring, or testing means
96418, 96419, 116DIG25, B01D 4642
Patent
active
059171413
ABSTRACT:
An air filter monitoring device that includes an attachment mechanism for attaching the monitoring device to the cover grate of an air return of an air conditioning system and a first and a second air flow actuated switch wired electrically in series with an alerting device, such as a light emitting diode and/or an audible alarm, each having an air resistance plate positioned within an air flow chamber. The air flow chamber is formed within a housing having an adjustable air intake inlet in connection with the air flow chamber. Air flowing through the air flow chamber within a range between a first and a second predetermined value causes the first and second air flow actuated switches to activate the alerting device.
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Breaux Joseph N.
Smith Duane S.
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