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. 16, 1990
Filed:
Sep. 27, 1989
Applicant:
Inventors:
Rudolf Zeller, Winzingen, DE;
Joachim Neumann, Oberkochen, DE;
Assignee:
Carl-Zeiss-Stiftung, Heidenheim/Brenz, Oberkochen, DE;
Primary Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
33502 ; 33567 ; 73 / ;
Abstract
A calibration-test member in the form of a ball plate fixedly mounts a plurality of precision balls arrayed in spaced relation in a single plane. The ball plate is of symmetrical construction with respect to this plane, the balls being so mounted within one or more cutouts of the plate or on the edge of the plate, with ball centers in the plane of symmetry of the plate, that contacting of the balls is possible from both sides.