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:
Oct. 10, 1995
Filed:
Sep. 03, 1993
Applicant:
Inventors:
Gunther Nelle, Bergen, DE;
Siebert Holstein, Stein/Traun, DE;
Assignee:
Johannes Heidenhain GmbH, Traunreut, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
33707 ; 33706 ; 2502 / ; 356374 ;
Abstract
An apparatus and method for measuring displacement by determining the relative speed between a scale and a scanning plate from reading out a first track twice at different times. From this, correction values for the other tracks are calculated, which represent values from those tracks that would have been read out if all those tracks had been read out at the same time the first track was read out instead of sequentially.