Geometrical instruments – Distance measuring – Scale reading position sensor
Reexamination Certificate
2008-09-04
2010-12-28
Fulton, Christopher W (Department: 2841)
Geometrical instruments
Distance measuring
Scale reading position sensor
Reexamination Certificate
active
07856734
ABSTRACT:
A linear measuring arrangement for measuring a relative position of two objects, the linear measuring arrangement including guide surfaces, a scale having a measuring graduation and a scanning carriage for scanning the measuring graduation, wherein the scanning carriage is linearly guided in a measuring direction on the guide surfaces. The linear measuring arrangement further including a carrier device which can be fastened to one of the two objects and a coupling, by which the scanning carriage is coupled to the carrier device rigidly in the measuring direction and transversely thereto resiliently. The coupling includes a first coupling element, having a first coupling face, arranged on the scanning carriage and a second coupling element, having a second coupling face, arranged on the carrier device, wherein the second coupling face contacts the first coupling face and wherein at least one of the first and second coupling elements is made of a ceramic material at least in an area of a contact.
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Brinks Hofer Gilson & Lione
Dr. Johannes Heidenhain GmbH
Fulton Christopher W
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