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, 1995
Filed:
Nov. 24, 1992
Applicant:
Inventors:
Haruyoshi Kitayoshi, Takatsuki, JP;
Atsuhiko Tamaki, Kyoto, JP;
Assignee:
Tsubakimoto Chain Co., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324107 ; 324141 ; 324142 ;
Abstract
An electric power detector for a three-phase AC voltage supply which measures the current of one phase and the voltage between the one phase and another phase and computes the phase difference between the voltage and the current, decides the phase rotation direction by comparing the phase difference with a specified angle, and obtains a power factor angle by adding or subtracting 30.degree. to or from the phase difference corresponding to the result of the decision to produce a power factor angle for computing three-phase power.