Geometrical instruments – Miscellaneous – Light direction
Reexamination Certificate
2005-11-15
2005-11-15
Bennett, G. Bradley (Department: 2859)
Geometrical instruments
Miscellaneous
Light direction
C033S502000, C033S706000
Reexamination Certificate
active
06964102
ABSTRACT:
A device for detecting the rotational movement of an element which is rotatably seated around an axis, the device including a material measure that rotates about an axis of rotation. A first measuring graduation provided on the material measure and which scans along a first direction, which has a component along the axis of rotation and a second measuring graduation provided on the material measure, wherein both the first measuring graduation and the second measuring graduation surround the axis of rotation in a ring shape, and which can be scanned along the first direction and a second direction that is linearly independent of the first direction. At least three measuring heads, which are spaced apart from each other along a circumferential direction which surrounds the axis of rotation, are assigned to each of the first measuring graduation and the second measuring graduation for scanning the first measuring graduation and the second measuring graduations.
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“Werkzeugmaschinen und Fertigungssysteme,” published by VDI Publishers, vol. 4, 1996, pp. 148-153.
Bennett G. Bradley
Brinks Hofer Gilson & Lione
Dr. Johannes Heidenhain GmbH
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