Automatic temperature compensated boiler thermostat

Details Automatic temperature compensated boiler thermostat Automatic temperature compensated boiler thermostat

1979-11-27

1981-09-22

Wayner, William E.

Automatic temperature and humidity regulation

Combined heater and apartment controlled

236 91F, 237 8R, F24D 510, F24D 300

Patent

active

042905516

ABSTRACT:
A control apparatus for a fuel fired central heating boiler has a first temperature control circuit including a first thermistor for sensing external ambient temperature and a second thermistor for sensing the temperature of the circulating water produced by the boiler. A second temperature control circuit has a thermistor for sensing the temperature in the space to be heated. A relay is operated by the outputs of the first and second control circuits and itself controls the boiler. The first and second thermistors are connected in series and have different resistance/temperature characteristics so that a given change in the external ambient temperature corresponds to a greater change in the temperature of the circulating water.

REFERENCES:
patent: 2265512 (1941-12-01), Brown et al.
patent: 2272492 (1942-02-01), Weyher
patent: 2297705 (1942-10-01), Jehle
patent: 2375988 (1945-05-01), Gille et al.

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