Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1981-10-19
1984-03-06
Haroian, Harry N.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33367, G01C 906
Patent
active
044345615
ABSTRACT:
A device and method for locating two or more points on a horizontal plane is disclosed. The device emits an audio or visual signal when fluid in a tube reaches a designated level. When the signal is given, the fluid at the other end of the tube will be on the same horizontal plane, thereby enabling the user to locate points on the horizontal plane.
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Haroian Harry N.
Rohe John F.
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