Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1980-05-19
1982-08-17
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219413, 219408, 219494, 219506, 99328, 99329R, 219486, 364189, H05B 102
Patent
active
043451454
ABSTRACT:
A toaster-oven appliance has a control circuit which enables a user to program the operation of the appliance through a keyboard with audible feedback and which includes functional keys for selecting one mode of operation from available BAKE, BROIL, SLOW COOK, TIMER and TOAST modes, and numerical keys for entering a temperature, time interval and toast color. The BAKE and BROIL functions may be used with the TIMER function to provide TIME-BAKE and TIME-BROIL functions. An interactive digital display is provided to display a user selected function, temperature, time interval, or an error indication in the event that an impermissible entry is made. In the presently preferred embodiment that is described, the control circuit includes microprocessor-based programmable digital logic. The microprocessor operates under the direction of a master program. The control circuit, under the direction of the microprocessor, periodically checks the control signals and the operation of the appliance to establish that operation is normal. Information stored in the memory of the microprocessor is periodically updated. An audible signal is generated when the timer time interval has expired, when the selected temperature has been reached in the BAKE mode and when a number of alarm conditions occur. The digital logic together with a digital-to-analog converter provides enhanced temperature control and repeatability.
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"Microprocessor Rules the Roast", Inspec. Electronics, pp. 105-110, 12/1976, vol. 49, #25.
Appliance Manufacturer (p. 33), 7/1975.
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Texas Instruments Bulletin Cl-304, 1978.
General Electric Company
Nieves Carlos
Paschall M. H.
Platt Leonard J.
Powers George R.
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