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:
Feb. 26, 1980
Filed:
Jan. 27, 1978
Applicant:
Inventor:
Siegbert Holstein, Stein a.d. Trun, DE;
Assignee:
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
3312 / ; 356373 ;
Abstract
A scanning unit is provided which is adapted for translation in a longitudinal direction along three guide surfaces defined by a length measuring device. The preferred embodiment of this scanning unit includes at least one set of bearings which is adapted to contact each of the three guide surfaces. Each set of bearings includes two bearings which are arranged in tandem along the longitudinal direction such that the separation between the two bearings in each set is greater than the anticipated longitudinal width of irregularities and gaps associated with joints in the guide surfaces.