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:
Aug. 15, 1989
Filed:
Dec. 22, 1988
Tokyo Electric, Co., Ltd., Tokyo, JP;
Abstract
The invention provides an electronic weighing instrument of the electrostatic capacity type which eliminates an influence on a measured weight value of a rate of change in oscillation frequency which is caused by environmental conditions such as an ambient temperature or a humidity. The electronic instrument comprises a pair of capacitors having capacitances which are differentially varied by a displacement caused by a load. The capacitors are alternately connected to the oscillating circuit at predetermined intervals of time, and each time either of the capacitors is connected to the oscillating circuit, an oscillation frequency is fetched from the oscillating circuit. Then, a difference and a sum between two different oscillation frequencies successively fetched from the oscillating circuit are calculated, and the difference is divided by the sum to obtain a measured weight value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile