Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1986-11-13
1987-11-17
Goldberg, E. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219446, 219466, H05B 376
Patent
active
047075899
ABSTRACT:
A heating unit suitable for mounting in a cooking hob includes a circular tray having a layer of thermally-insulative material disposed therein and a peripheral thermally-insulative wall, within which four infra-red lamps, each containing a tungsten filament, are supported. The tray also includes an inner thermally-insulative wall, which encloses the length of each filament. Between the peripheral and inner walls, two conventional, wire-wound heating elements are disposed. The filaments and the elements are energizable independently and/or concurrently, and series and/or parallel combinations of the filaments and the elements may be switched to provide various discrete power outputs.
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Brooks Steve M.
May David R.
Goldberg E. A.
Thorn Emi Patents Limited
Walberg Teresa J.
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