The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1993
Filed:
Jan. 29, 1991
Whirlpool International B.V., Veldhoven, NL;
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.