Temperature dependent electronic control switch

Details Temperature dependent electronic control switch Temperature dependent electronic control switch

1978-07-07

1980-12-23

Tapolcai, Jr., William E.

Automatic temperature and humidity regulation

Ventilator type

137 82, 236 75, 251129, F24F 704

Patent

active

042405807

ABSTRACT:
A temperature dependent electronic control switch, especially suited for an automatic temperature control in vehicles, including one or more NTC resistors as sensors in a bridge circuit, an amplifier, to amplify the signals from the sensors, a solenoid for producing a variable magnetic field from signals received by the amplifier, an iron strip, an air nozzle connected to a vacuum, a servomotor connected between the air nozzle and the vacuum, and a control flap. The iron strip, moving in response to the magnetic field from the solenoid, obstructs an opening in the air nozzle, thereby changing the pressure felt by the servomotor and thereby causing the control flap of an air-conditioner or heater to move in a predetermined manner to mix air of different temperatures.

REFERENCES:
patent: 2474679 (1949-06-01), Klug
patent: 2601867 (1952-07-01), Alyea
patent: 2837104 (1958-06-01), Side
patent: 3809314 (1974-05-01), Engelke et al.
patent: 3822039 (1974-07-01), Mori et al.
patent: 3911354 (1975-10-01), Stanton
patent: 3914952 (1975-10-01), Barbier
patent: 3982554 (1976-09-01), Saito et al.
patent: 4170339 (1979-10-01), Ueda et al.

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