H - Electricity – 05 – B
Patent
H - Electricity
05
B
309/82, 309/86
H05B 3/74 (2006.01) H05B 1/02 (2006.01) H05B 39/00 (2006.01)
Patent
CA 1238074
ABSTRACT OF THE DISCLOSURE A heating unit includes two tubular tungsten-halogen lamp, each having a tungsten filament. The lamps are supported within a ring of ceramic fibre material and the unit is preferably mounted beneath an infra-red-transmissive cooktop to define a hotplate area of a cooking hob. A control circuit provides a range of discrete power outputs of the lamps, each power output corresponding to a power control setting set by a user of the cooking hob. The circuit includes a phase control circuit for switching power to the lamps at a predetermined phase angle to achieve one or more of the lower power outputs.
489414
Crossley Peter W.
Fellerman Bernard F.
Newton Stephen J.
Wellcome David
Ridout & Maybee Llp
Thorn Emi Appliances Limited
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