Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1982-03-26
1984-08-21
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
126351, 219506, 219508, 236 47, 236 51, 237 8R, H05B 102, G05D 2319, F24H 100
Patent
active
044671784
ABSTRACT:
A control system for selectively regulating the operation of water heating tank in accordance with anticipated hot water demand thus eliminating storage heat losses during periods when hot water is not required includes a remote control unit, a relay unit and first and second thermostats, all electrically connected selected circuits with an electric heating element located within the tank. The first and second thermostats are arranged to sense the temperature of the tank water and the operating temperature (115.degree. F.) of the first thermostat is lower than that of the second thermostat (150.degree. F.). The remote control unit includes a three-position switch in circuit with the relay unit and first and second thermostats to permit continuous energization of the heating element under control of either the first thermostat in the first switch position or the second thermostat in the second position to provide a continuous supply of hot water at either 115.degree. F. or 150.degree. F. The third switch position permits selective "one-time" operation of the heating element through a first or a second relay unit holding circuit established by a first or a second momentary contact switch, respectively, on the remote control unit broken by the first or the second thermostat, respectively, upon attainment of a predetermined temperature level (115.degree. F. or 150.degree. F.) within the tank. The remote control unit is provided with indicator lights associated with the selected circuits for providing indication of the tank water temperature and condition of energization of the heat element. The remote control unit may include a cancel switch for deenergizing the heat element when the three-position switch is in the third position.
REFERENCES:
patent: 1968549 (1934-07-01), Allen
patent: 2266147 (1941-12-01), Biebel
patent: 2379398 (1945-06-01), Clark
patent: 2480302 (1949-08-01), Pankow
patent: 2761950 (1956-09-01), Tagliaferri et al.
patent: 4267432 (1981-05-01), Kiepe
patent: 4317987 (1982-03-01), Fieldman
patent: 4361274 (1982-11-01), Raleigh et al.
"One-Shot Control of Immersion Heaters", Wireless World, Apr., 1981, vol. 87, No. 1543, p. 49.
"One-Shot for an Immersion Heater", Elektor, Jul./Aug., 1977, vol. 3, No. 7-8, p. 37.
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