Rotatable disc support arrangement for angle measuring apparatus

Details Rotatable disc support arrangement for angle measuring apparatus Rotatable disc support arrangement for angle measuring apparatus

1979-03-05

1981-08-04

Stephan, Steven L.

Geometrical instruments

Straight-line light ray type

Instrument support

33285, 33292, G01C 100

Patent

active

042814634

ABSTRACT:
Angle measuring apparatus such as a transit has a pair of superimposed discs which are rotatable with respect to each other. One of the discs is rotatable with a viewing telescope support which has a vertically extending rotatable shaft received in a stationary shaft. A commercially available bearing is used between the shafts with the inner race fitted to the rotatable shaft and the outer race to the stationary shaft. The outer race of the bearing further carries the other of the disc.

REFERENCES:
patent: 2164051 (1939-06-01), Brunson
patent: 3930694 (1976-01-01), Acker et al.

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