Electric heating – Metal heating – Of cylinders
Patent
1991-01-29
1993-09-21
Reynolds, Bruce A.
Electric heating
Metal heating
Of cylinders
219 1055E, 99325, 426243, H05B 668
Patent
active
052471462
ABSTRACT:
This invention provides a method and apparatus for determining the weight of foods contained in a microwave oven and for controlling their treatment in accordance with that weight. The apparatus determines the weight by measuring the heating of a body of microwave-sensitive material disposed in the chamber during a stage of operation of the magnetron at a predetermined power for a predetermined time, wherein the heating of the body disposed on a wall of the cooking chamber which is not screened by the foods is measured by comparing the variation in the electrical characteristics of components disposed external to the chamber. The electrical components are disposed in a position corresponding with the body and in a position corresponding with a part of the wall which is not associated with the body, such that ambient temperature variations in the body are compensated for by corresponding temperature variations in the wall not associated with the body.
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Civanelli Claudio
Frattini Ivano
Montanari Carlo
Hoang Tu
Krefman Stephen D.
Reynolds Bruce A.
Roth Thomas J.
Turcotte Thomas E.
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