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:
Jan. 07, 2003
Filed:
Aug. 08, 2000
Masamichi Tsuchiya, Ota-Ku, JP;
Takamasa Nagasawa, Ota-Ku, JP;
Tokyo Weld Co., Ltd., Tokyo-To, JP;
Abstract
The present invention prevents from occurring a measurement error of electrical capacitance based on variance of a voltage applied to capacitors. An apparatus of measuring capacitance has a power supply for applying a voltage to capacitors, a voltmeter of measuring the voltage applied to the capacitors W, and an amperemeter of measuring a current flowing through the capacitors. A capacitance measuring part is connected to the voltmeter and the amperemeter, and measures electrical capacitance and electrical positive electrode of the capacitors based on the voltage and the current applied to the capacitor. A determining part determines whether or not the voltage deflects from the voltage between upper-limit and lower-limit values. When the determining part determines that the voltage changes, the warning part performs warning.