Flexible level

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive

Patent

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Details

G01C 504

Patent

active

047591340

ABSTRACT:
A leveling instrument is provided with a flexible length of tubing extruded with a pair of thin-walled, balloon-like diaphragms at opposite ends thereof. The tubing contains a flow passage filled with liquid in communication with atmospheric pressure acting upon the liquid through the diaphragms. The liquid provides a leveling medium for the instruments for establishing the level of one location with respect to another location. A method of manufacturing the leveling instrument is also disclosed.

REFERENCES:
patent: 762072 (1904-06-01), Lord
patent: 915084 (1909-03-01), Eberhard
patent: 3842513 (1974-10-01), Clark

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