Electronic temperature control system for thermostatic control

Details Electronic temperature control system for thermostatic control Electronic temperature control system for thermostatic control

1976-03-25

1977-10-25

Wayner, William E.

Automatic temperature and humidity regulation

Miscellaneous

Burner controls with automatic cutoff

307252F, 361165, G05D 2324, H03K 1760

Patent

active

040552969

ABSTRACT:
An electronic temperature control system utilizes a circuit having two main terminals for connection to a low voltage relay control system of the type generally used in residential heating or cooling systems without the need for an auxiliary source of power. The circuit includes a temperature sensing thermistor, an adjustable reference voltage control, a programmable unijunction transistor voltage threshold detector circuit, power switching thyristor means and bridge diodes. Heat anticipation is provided by thermally coupling the thyristor switching means and the temperature sensing thermistor.

REFERENCES:
patent: 3064103 (1962-11-01), Biermann et al.
patent: 3328606 (1967-06-01), Pinckaers
patent: 3372328 (1968-03-01), Pinckaers
patent: 3684171 (1972-08-01), Evalds
patent: 3783369 (1974-01-01), Chambers
patent: 3817453 (1974-06-01), Pinckaers
patent: 3861589 (1975-01-01), Carlson
The D13T - A Programmable Unijunction Transistor, 11/67, W. R. Spofford, Jr., G.E. Bulletin, pp. 1, 2 & 7.

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