Rice cooker-warmer

Details Rice cooker-warmer Rice cooker-warmer

1982-03-04

1984-06-19

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219486, 219505, 219442, 219491, 99325, H05B 102

Patent

active

044554800

ABSTRACT:
The output of a first bridge circuit including as one component element a thermistor for detecting the temperature of a pan is compared with a preset value in a first operational amplifier. The first operational amplifier provides a low level output when the detected temperature is below a predetermined temperature. When this low level output is supplied to a second operational amplifier, the output thereof goes to a high level to turn on a transistor so as to energize a relay for passing current to a cooking heater. When a cooking end temperature is reached, the internal resistance of the thermistor is reduced, and as a result the output of the first operational amplifier goes to a high level, causing the output of the second operational amplifier to go to a low level. Thus, a warming heater is energized while the cooking heater is de-energized.

REFERENCES:
patent: 4241288 (1980-12-01), Aoshima et al.
patent: 4300037 (1981-11-01), Padden
patent: 4320285 (1982-03-01), Koether
patent: 4330702 (1982-05-01), Cheng
patent: 4362923 (1982-12-01), Aoshima

Affiliated with

Also associated with

Rating

Rice cooker-warmer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rice cooker-warmer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rice cooker-warmer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-415062