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:
Nov. 02, 1982
Filed:
Sep. 15, 1980
Wilbur E DuVall, Victorville, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
To generate a signal having at all times an amplitude directly proportional to the velocity of relatively moving members, a plurality of phase displaced position indicative signals are first generated. A pair of the position signals that are phase displaced by 90.degree. are then differentiated to provide velocity signals. Each velocity signal is applied in both its regular form and its inverted form to an analog multiplexer which receives the other position signals as control signals. The composite output of the multiplexer, after filtering to remove high frequency glitches due to sampling, is a signal having an amplitude at all times directly proportional to velocity.