Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1996-11-06
1999-02-02
Walberg, Teresa J.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219464, H05B 368
Patent
active
058668799
ABSTRACT:
An infra-red heater arrangement for a glass-ceramic top cooking appliance includes a heater connected to a manually adjustable cyclic energy regulator having a full power setting and a plurality of other, lower power, settings. The heater incorporates at least one infra-red heating element having a substantial positive temperature coefficient of electrical resistance and first and second electrical resistance heating elements having low temperature coefficients of electrical resistance relative to that of the at least one infra-red heating element. The first electrical resistance heating element can be connected in series with the at least one infra-red heating element and to a power supply in the full power setting of the cyclic energy regulator, which setting is attainable directly from an `OFF` setting of the regulator. The infra-red heating element and the first and second electrical resistance heating elements are provided in an undivided heating zone and the first and second electrical resistance heating elements can be connected in series and in series with the at least one infra-red heating element, and to the power supply, for cyclic energisation, at duty cycles including 100 percent, in the other settings of the cyclic energy regulator.
REFERENCES:
patent: 4808798 (1989-02-01), Goessler et al.
European; Search Report No. EP 96 30 7577.
Ceramaspeed Limited
Dorman Ira S.
Patel Vinod D.
Walberg Teresa J.
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