Bearing means for angle measuring instruments
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United States of America Patent
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-
Jun 26, 1984
Issued Date -
N/A
app pub date -
Apr 20, 1983
filing date -
Mar 12, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An angle measuring instrument such as a theodolite having a housing containing a viewing optical system. The housing has a pair of axially aligned horizontal shafts through which it is mounted on a support frame for a swingable movement in a vertical plane. The shafts are mounted on the frame through ball bearings having inner and outer races. One of the inner and outer races is preloaded in the axial direction so that a stable movement of the bearing is ensured.
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