Heating and temperature control device for a bath-liquid

Electric heating – Heating devices – With heater-unit housing – casing – or support means

Patent

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Details

219330, 219442, 219511, 219530, 337105, H05B 306

Patent

active

039731022

ABSTRACT:
The invention contemplates an automatic device for closely held temperature control of a body of liquid via an electric heater, as for example via a liquid-immersed heater element. The control device provides an enclosed air space with shared exposure to ambient air and to air that has been heated by the liquid. Thermostatic-switch means and an electrical heater element are contained within the enclosed air space and cooperate to establish an on-off supply of electrical energy to the immersed heater element.

REFERENCES:
patent: 2828389 (1958-03-01), Ellenberger
patent: 3322918 (1967-05-01), Ulanet
patent: 3497677 (1970-02-01), Blain
patent: 3737621 (1973-06-01), Elkins
patent: 3803386 (1974-04-01), Rodriques
patent: 3890486 (1975-06-01), Fitzgerad
patent: 3892200 (1975-07-01), Ramsauer

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