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. 27, 1994
Filed:
Apr. 08, 1993
Gunther Nelle, Bergen, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
A length measurement device for measuring the relative position of two objects is disclosed wherein a graduation on a scale carrier is scanned by a scanning unit for obtaining measured position values. The scale carrier is connected to a first fixed reference point within the measuring length in a rigid manner, and is connected with a carrier member so as to be longitudinally displaceable, for compensating for measurement errors which are caused by temperature variation. The carrier member is rigidly connected with a first object at a second fixed reference point within the measuring length and is connected so as to be longitudinally displaceable with the first object 1. The first fixed point and/or the second fixed point are changeable or movable within the measuring length.