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. 15, 2006
Filed:
Jan. 13, 2003
Applicants:
Janez Novak, Ljubljana, SI;
Gregor Dolsak, Velike Lasce, SI;
Inventors:
Janez Novak, Ljubljana, SI;
Gregor Dolsak, Velike Lasce, SI;
Assignee:
Renishaw, PLC, Gloucestershire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 11/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A scale () has magnetic incremental scale marks in a track (), and a pseudo-random code sequence in a reference mark track (). Sensors () feed the pattern of the code in the track () into a bi-directional shift register (). So that a user can select any desired position for use as a reference mark, a memory () is provided, into which any selected code value can be pre-stored. A comparator () then compares the code value in the shift register () with the code value in the memory () and outputs a reference mark signal (Ri) when they match.