Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1991-07-16
1992-04-14
Haroian, Harry N.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33391, 33371, 33376, 33384, 33343, G01C 900
Patent
active
051035693
ABSTRACT:
Disclosed is a leveling tool that has three leveling indicators mounted thereon, one of which is removable and usable as a separate tool when bending electrical conduit. A calculator is integrated into the leveling tool for performing calculations during leveling or during the bending of conduit. A phosphorescent liquid is used in the bubble level indicators for low light use.
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patent: 4782597 (1988-11-01), Mills
Haroian Harry N.
The Level Corporation
Vandigriff John E.
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