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:
Dec. 10, 1996
Filed:
Aug. 05, 1994
Applicant:
Inventors:
Andreas Franz, Trostberg, DE;
Wolfgang Holzapfel, Obing, DE;
Assignee:
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
364561 ; 33707 ; 356375 ; 364525 ; 377 24 ;
Abstract
A position measuring method and apparatus for obtaining signals substantially free of harmonics with the aid of a periodic graduation and a non-periodic or aperiodic scanning graduation, wherein the position of the grating lines n within the scanning graduation is determined in accordance with a statistical distribution.