Leveling apparatus and method

Details Leveling apparatus and method Leveling apparatus and method

1991-05-17

1992-07-21

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33377, G01C 504

Patent

active

051311569

ABSTRACT:
A leveling apparatus includes at least two scales defined by enclosed receptacles, each having a cavity and a port into the cavity. Each receptacle also preferably has a top wall with a convex inner surface defining the top of the cavity. The top wall also preferably has a concave outer surface. The receptacles are connected through their ports in a common closed fluid communication system which is preferably only partially filled with a liquid sensitive to the levelness of a surface to be tested. The apparatus is spread across a surface whose levelness is to be tested, and the levelness is indicated by the relationships between the surfaces of the liquid in the scales and elevation indicating indicia on the scales as observed through the preferably concave top wall of each receptacle.

REFERENCES:
patent: 3101554 (1963-08-01), Gottula
patent: 4686773 (1987-08-01), Brewer

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