Domestic appliance and heating structure for a domestic...

Details Domestic appliance and heating structure for a domestic... Domestic appliance and heating structure for a domestic...

2007-05-29

2007-05-29

Evans, Robin (Department: 3742)

Electric heating

Heating devices

With heater-unit housing, casing, or support means

C219S483000, C219S505000, C219S497000, C219S512000

Reexamination Certificate

active

10566553

ABSTRACT:
An electric heating structure of a domestic appliance includes at least one first electric heating track (23) having a positive temperature coefficient and at least one additional electric heating track (27, 28). A control structure (22, 25, 29) is provided for controlling electric power supply to said first and additional heating tracks (23, 27, 28) and is sensitive to the heating of said at least one first heating track (23) for switching on said at least one additional electric heating track (27, 28) in parallel and in addition to said at least one first heating track (23) when said at least one first heating track (23) has been heated to at least a predetermined extent.

REFERENCES:
patent: 4246468 (1981-01-01), Horsma
patent: 4276466 (1981-06-01), Middleman et al.
patent: 4292499 (1981-09-01), Kleinschmidt et al.
patent: 4518850 (1985-05-01), Grasso
patent: 5021634 (1991-06-01), Santoro et al.
patent: 5396047 (1995-03-01), Schilling et al.
patent: 5471035 (1995-11-01), Holmes
patent: 5818011 (1998-10-01), Ito et al.
patent: 6005228 (1999-12-01), Dickens et al.
patent: 6713729 (2004-03-01), Takeo et al.
patent: WO2004042132 (2004-05-01), None

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