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:
Mar. 04, 1997
Filed:
May. 23, 1995
Sakae Ishikawa, Chiba-ken, JP;
Miyachi Technos Corporation, Chiba-ken, JP;
Abstract
A thyristor voltage detector includes a current-limiting resistor having a high resistance (e.g., 30 kilo-ohm) and a switching device (e.g., photo MOS FET) of a switching photo coupler which are serially connected between a thyristor and a waveform converter (e.g., a pair of photo couplers). The photo MOS FET is turned on by a light from a light emitting diode of the switching photo coupler in respect to a high level of a switching control signal. A voltage across the thyristor is applied to the waveform converter via the photo MOS FET and the resistor. The arrangement eliminates the need for a step-down transformer, achieves downsizing and cost cutting, and reduces electric power consumption.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile