Heating apparatus

Details Heating apparatus Heating apparatus

1987-09-18

1988-07-19

Goldberg, E. A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219364, 219461, 219464, F24H 300, H05B 100, H05B 302

Patent

active

047587105

ABSTRACT:
A heating unit includes two tubular tungsten-halogen lamps, 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.

REFERENCES:
patent: 3369108 (1968-02-01), Strachan
patent: 4238665 (1980-12-01), Tremarco
patent: 4551616 (1985-11-01), Buttery

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