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. 23, 1990
Filed:
Jun. 19, 1989
Applicant:
Inventors:
Karl-Hermann Breyer, Heidenheim, DE;
Franz Starp, Wildbad, DE;
Assignee:
Carl-Zeiss-Stiftung, Heidenheim/Brenz, Oberkochen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
33503 ; 33504 ; 33 / ;
Abstract
A coordinate-measuring instrument has a purely mechanical device (14) to compensate for the weight of a vertically displaceable spindle (9). The compensation device consists of a helical-coil spring having a working range which is small as compared with its length in relaxed condition, and a belt transmission interposed between the spring and the spindle (9). The belt transmission is preferably developed in the manner of a block and tackle. A first or drive pulley engages and drives the belt for Z-axis positioning of the spindle, and a second or belt-tension pulley applies weight-compensating tension to the belt.