Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2008-04-29
2008-04-29
Le, Que T (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S239000
Reexamination Certificate
active
11508807
ABSTRACT:
An angular position measuring device includes two assemblies. The first assembly is rotatable with respect to the second assembly about an axis. A coupling is arranged at the second assembly, which has an elastic spring behavior in the direction of the axis. Furthermore, a stopping element is assigned to the angular position measuring device. The angular position measuring device is attachable to a machine part. If coupling is not prestressed, there is a free gap between the machine part and the second assembly, having an extension in the direction of the axis. The stopping element is able to be brought into a stopping position in which at least one region of the stopping element is in operative connection to the second assembly for the limitation of the axial spring motions. A measuring system includes such an angular position measuring device.
REFERENCES:
patent: 2574603 (1951-11-01), Uhlig
patent: 103 43 727 (2005-04-01), None
Dr. Johannes Heidenhain GmbH
Kenyon & Kenyon LLP
Le Que T
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