Positioning device

Details Positioning device Positioning device

1984-03-28

1989-07-18

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33379, 33 1H, G01C 906

Patent

active

048480037

ABSTRACT:
Apparatus is described for positioning a tilt meter (12) in a horizontal plane (14) and maintaining it horizontal despite temperature changes, with greater precision than heretofore. Leveling screws 25-27 which hold the upper surface (18) of a base member (16) precisely horizontal, are engaged with nuts (21-23) attached to the base member, where the nuts are made of the same material as the screws, to eliminate tilting of the base member with temperature changes, due to different nuts engaging a screw at a different height. The nuts are attached to the upper surface (18) of the base member, to further avoid imprecision. The curved glass bubble tubes (60) are mounted in V-grooves (80) in four point contact therewith.

REFERENCES:
patent: 2130648 (1938-09-01), Smith
patent: 2178264 (1939-10-01), Meyer
patent: 2640267 (1953-06-01), Geier
patent: 3030710 (1962-04-01), Fell
patent: 4521974 (1985-06-01), Neis et al.

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