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:
Apr. 27, 2021
Filed:
Jun. 04, 2010
Applicant:
Andrew Paul Gribble, Bristol, GB;
Inventor:
Andrew Paul Gribble, Bristol, GB;
Assignee:
RENISHAW PLC, Wotton-under-Edge, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 5/347 (2006.01); G01D 5/244 (2006.01); G01D 5/245 (2006.01);
U.S. Cl.
CPC ...
G01D 5/24461 (2013.01); G01D 5/2455 (2013.01); G01D 5/34715 (2013.01); G01D 5/34792 (2013.01);
Abstract
A method of operating a position encoder apparatus, including a scale having features defining position information and a readhead for reading the scale. The method includes: calculating extrapolated position information from at least one previous reading of the scale; comparing an extrapolated position with a position calculated from a reading of the scale to determine any discrepancy between them; using the extrapolated position information whether or not there is a discrepancy; and maintaining a record of any discrepancies.