Bearing means for angle measuring instruments

Details Bearing means for angle measuring instruments Bearing means for angle measuring instruments

1983-04-20

1984-06-26

Stearns, Richard R.

Geometrical instruments

Straight-line light ray type

Vertical angle

33299, 308184R, G01C 102, F16C 3504

Patent

active

044557582

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.

REFERENCES:
patent: 989258 (1911-04-01), Hess
patent: 1557848 (1925-10-01), Kirner
patent: 1705281 (1929-03-01), Bott
patent: 2506404 (1950-05-01), Woodfield et al.
patent: 2531252 (1950-11-01), Brunson
patent: 2602229 (1952-07-01), Larsen et al.
patent: 2803507 (1957-08-01), Mempel et al.
patent: 2857765 (1958-10-01), Kiefer, Jr.

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