Structure of vertical and horizontal surveying instrument

Details Structure of vertical and horizontal surveying instrument Structure of vertical and horizontal surveying instrument

1979-03-21

1980-10-28

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33347, 33401, C01C 904

Patent

active

042298857

ABSTRACT:
A level for use in taking level readings on vertical and horizontal surfaces. The level has a case within which an enclosure with some instrumentation is disposed in a vertical position for taking level readings on vertical or horizontal surfaces. The instrumentation has a gravity-responsive weight pendulum mounted on a knife-edge pivot supported on an edge contact with its pivot. The pendulum has an actuating pivot having two flat sides fixed at an upper end for engaging two knife-edge pivots on a pointer which is actuated laterally by the pendulum proportionately to the extent a surface being read is out of the vertical or horizontal. The pointer is likewise pivotally supported on an edge supported on a supporting knife-edge pivot.

REFERENCES:
patent: 1667840 (1928-05-01), Colvin
patent: 1804490 (1931-05-01), Bagge
patent: 2216086 (1940-09-01), Meenan
patent: 2708317 (1955-05-01), Warne
patent: 3225451 (1965-12-01), Olexson et al.

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