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. 11, 1992
Filed:
Dec. 17, 1990
Yasaka Mitsuo, Tokyo, JP;
Tokyo Cathode Laboratory Co., Ltd., Tokyo, JP;
Abstract
A detecting electrode disposed at a position opposed to an article to be conveyed and an auxiliary electrode shielded from an external electric field are connected to a field effect transistor through switch means. When the article to be conveyed passes the front of the detecting electrode, charge is induced at the detecting electrode, the gate electric field of the field effect transistor is varied according to the quantity of charge to produce an output responsive to the quantity of charge. When the switch means is switched to the auxiliary electrode, a zero potential is detected. Therefore, the charged potential of the article to be conveyed can be accurately measured.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile