Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1981-12-15
1984-08-21
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219330, 219508, 219492, 236 46R, H05B 102
Patent
active
044671830
ABSTRACT:
A liquid temperature control apparatus controllably heats a liquid from a temperature before a control to a desired reference temperature by varying the magnitude and/or application time period of a power for energizing a heater on the basis of a difference between a voltage corresponding to the actual temperature before a control and a reference voltage corresponding to the reference temperature. The parameter on which the magnitude and/or application time period of the heater power is to be based may be the sum of a first voltage differential between a voltage corresponding to the actual temperature before a control and the reference voltage and a second voltage differential between a voltage corresponding to an actual temperature after the start of a control and the reference voltage.
REFERENCES:
patent: 3869597 (1975-03-01), Strange
patent: 3946200 (1976-03-01), Juodikis
patent: 4225777 (1980-09-01), Schindler
patent: 4300037 (1981-11-01), Padden
patent: 4327268 (1982-04-01), Frank
patent: 4363957 (1982-12-01), Tachikawa et al.
Alexander David G.
Paschall M. H.
Ricoh & Company, Ltd.
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