Control arrangements for heating circuits

Automatic temperature and humidity regulation – With timing element – Timer other than clock

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Details

236 47, 237 8R, F23N 520, F24D 300

Patent

active

043231926

ABSTRACT:
A control arrangement is provided for a heating system having heat outlets each controlled by a solenoid valve (210). Each heat outlet is connected to a pair of thermostatic switches (411, 413) operative at different temperatures. A time switch included in a central control means (108) is operative to selectively energize a pair of bus-bars (530, 532) at different times, thereby to provide common output signals for actuating the heat outlets via different thermostatic switches (411, 413) at different times to provide different heat outputs during different parts of a predetermined period of time (e.g. 24 hours). The central control means (108) includes a plurality of manual switches (540) each connecting the time switch output bus-bars (530, 532) to the thermostatic switches (411, 413) of an associated one of the heat outlets to manually set the heat output of the heat outlet. The time switch and each manual switch (540) cooperate in such a manner that each overrides the other as appropriate to keep the area heated by each outlet at an appropriate temperature.

REFERENCES:
patent: 3306348 (1967-02-01), Tucker
patent: 4217646 (1980-08-01), Caltagirone et al.

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