Automatic temperature and humidity regulation – Humidity control
Reexamination Certificate
2011-07-26
2011-07-26
Norman, Marc E (Department: 3744)
Automatic temperature and humidity regulation
Humidity control
C236S04600F, C236S049300, C004S213000
Reexamination Certificate
active
07984859
ABSTRACT:
A control apparatus for operating an exhaust fan in order to control humidity and odor in an enclosed confine includes a switch mounted within a path of electric power between an electric power source and the exhaust fan. A humidity sensor outputs a humidity signal defining level of relative humidity within the enclosed confine and a resistive voltage divider provides a reference voltage signal. A comparator compares the humidity signal with the reference signal and provides a control signal when a value of the humidity signal is equal to or greater than a value of the reference signal, the control signal causing the switch to supply the electric power to the exhaust fan. A timing circuit is activated by the control signal and is operable to maintain presence thereof for a predetermined period of time when the value of the humidity signal decreases below the value of the reference signal.
REFERENCES:
patent: 6935570 (2005-08-01), Acker, Jr.
patent: 7325748 (2008-02-01), Acker, Jr.
patent: 7690583 (2010-04-01), Cherewatti et al.
patent: 2006/0213000 (2006-09-01), Kimble et al.
patent: 5180475 (1993-07-01), None
patent: 8014631 (1996-01-01), None
Goodwin Marcus S.
Risner Norman
James Ray & Assoc
Norman Marc E
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