Position measuring device
AssigneeDr. Johannes Heidenhain GmbH
InventorsGunther Nelle, Walter Schmitt, Reinhold Schopf, Josef Weiss
Life of this patent
Estimating the term…
Abstract
A position measuring device including a scale carrier member and a scanning device for scanning the scale. A temperature difference is generated between the scale carrier member and/or the scanning device, on the one hand, and a housing surrounding the scale carrier member and the scanning device, on the other hand. The temperature difference ensures that condensate is always precipitated on the colder housing.
Claims56
In a position measuring device including a scale carrier member for a scale and a scanning device for scanning the scale, the improvement comprising means for generating a temperature difference between one of the scale carrier member and the scanning device, on the one hand, and the immediate surrounding of the scale carrier member and the scanning device, on the other hand, for producing a condensate.
In a position measuring device including a scale carrier member for a scale and a scanning device for scanning the scale, the improvement comprising means for generating a temperature difference between the scale carrier member and the scanning device, on the one hand, and the immediate surrounding of the scale carrier member and the scanning device, on the other hand, for producing a condensate.
Dependencies are inferred from the claim text.