Automatic temperature and humidity regulation – Motors – Relay
Patent
1977-01-21
1978-06-27
Wayner, William E.
Automatic temperature and humidity regulation
Motors
Relay
251 11, F16K 3118, G05D 2320
Patent
active
040969932
ABSTRACT:
A control valve is provided with environmental temperature compensation. Preferably, the valve is an electrically operated device having a valve member mounted for movement between at least first position and a second position. Means for electrically operating the device includes heater means interleafed with bi-metallic discs so that electrical energy input to the heater means controls disc expansion and contraction, thereby controlling physical position of the valve member. In a stand alone version of the control valve, a sensor is operatively connected between the bi-metallic discs and an electrical control means. The electrical control means is adapted to compare the signal generated by the sensor with a predetermined set point for controlling electrical energy input to the heater means. The control means regulates that electrical input until equality of comparison is attained. In system applications, the set point may be dependent upon any preselected variable, the control means in this last instance acting to regulate power input to the heater means to control valve operation in accordance with the condition of the variable selected.
REFERENCES:
patent: 3424377 (1969-01-01), Steghart et al.
patent: 3967781 (1976-07-01), Kunz
Emerson Electric Co.
Wayner William E.
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