Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1988-02-08
1989-07-25
Walberg, Teresa J.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219449, 219460, H05B 374
Patent
active
048516457
ABSTRACT:
A device for determining the temperature of a glass ceramic plate heated using heat coils or halogen lamps with a temperature sensor which emits a signal for a control circuit corresponding to the temperature of the glass ceramic plate. The heat coils or the halogen lamps are positioned in the internal space of a cylindrical vessel-like insulation support, and in which the surrounding wall of the insulation body, under spring tension, abuts on the glass ceramic plate heated by the radiation of the heating coils or the halogen lamps. Adequate control precision can be achieved by having the temperature sensor positioned in a recess in the surrounding wall of the insulation body, and is in a thermally-conductive connection with the lower side of the glass ceramic plate. The recess for the temperature sensor is positioned at a distance to the internal space of the insulation support and thus the dynamics of the control behavior can be adjusted to low hysteresis and optimized.
REFERENCES:
patent: 3624352 (1971-11-01), Deaton
patent: 4388520 (1983-06-01), McWilliams
patent: 4447710 (1984-05-01), McWilliams
patent: 4447711 (1984-05-01), Fischer
patent: 4518850 (1985-05-01), Grasso
Andre Wolfram K.
Wolf Kurt
Fissler GmbH
Pauley Douglas H.
Speckman Thomas W.
Walberg Teresa J.
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