Electric cooker having temperature warning means

Details Electric cooker having temperature warning means Electric cooker having temperature warning means

1982-02-10

1985-05-21

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219506, 219511, 219465, 340595, H05B 102

Patent

active

045188505

ABSTRACT:
An electric cooker having means for warning the user when one or more of the cooking surfaces is above a safe touching temperature comprises a glass ceramic cooking surface having one or more electrical heaters arranged on the underside of the cooking surface. A temperature monitoring device is thermally coupled with at least one of the one or more heaters and comprises an auxiliary heater, for example of PTC material, a thermally responsive device in the form of a thermistor, for example of PTC or NTC material, and a thermal buffer positioned between the auxiliary heater and the thermistor. A neon lamp or a filament lamp is provided for indicating when the thermistor is at or above a predetermined temperature.

REFERENCES:
patent: Re30619 (1981-05-01), Decker
patent: 3600118 (1971-08-01), Hirsbrunner
patent: 3612826 (1971-10-01), Deaton
patent: 3670960 (1972-06-01), Chambers
patent: 3906424 (1975-09-01), Clancy et al.
patent: 4314143 (1982-02-01), Bilstad et al.
patent: 4327280 (1982-04-01), McWilliams
patent: 4357525 (1982-11-01), Jenne
patent: 4394646 (1983-07-01), Gossler

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