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:
Feb. 21, 1984
Filed:
Jun. 22, 1981
Robert F Buchheit, Webster, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
The present invention is an electrometer probe disposed adjacent a photosensitive surface, the electrometer head providing an input amplifier that functions as a comparator to compare the voltage level on the photosensitive surface with a variable high voltage DC power supply. Control circuitry receives the output of the electrometer probe and in response to the signal adjusts the variable high voltage reference supply voltage. The control circuit adjusts the supply voltage to maintain the voltage at a ratio of time above (or below) total time as selected by a selection switch, for example 5 percent, 50 percent or 95 percent.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile