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:
May. 23, 1989
Filed:
Aug. 04, 1987
Peter Grund, Heinsberg, DE;
MAHO Aktiengesellschaft, Pfronten, DE;
Abstract
An apparatus for compensating for the thermal expansion of two machine parts which are relatively movable in longitudinal guideways. The apparatus comprises a rule, a support rod longitudinally disposed on the movable machine part for supporting the rule, and an electric scanning head mounted on the stationary machine part. The support rod is made of a material which exhibits negligible thermal expansion in the concerned temperature range. The forward end of the support rod is rigidly secured to the forward end of the movable machine part while the rear end thereof is movably guided on that machine part. The rear end of the rule is fixed to the rear end of the support rod. The scanning head is disposed on the stationary machine part in such a way that any thermal expansion of the stationary machine part cannot affect the location of the scanning head.