Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1990-10-25
1992-02-18
Will, Thomas B.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33396, 33378, G01C 906
Patent
active
050882040
ABSTRACT:
A level sensing unit, designed to be incorporated in a carpenter's level, is relatively insensitive to the expansion and contraction of the buoyant fluid, independent of the specific gravity of the fluid, and virtually free of oscillations accompanying a change in liquid orientation. The device can be constructed inexpensively of commonly available materials. The device has a float with an electrically conducting plate bisecting the float between its ends and is pivotally mounted on pins protruding from walls of a sealed housing. Adjacent to the opposing surfaces of the plate are two electrically conducting strips. At level neither strip contacts the nearest surface of the plate, but when the unit is not at level one or the other strip makes physical and electrical contact.
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Snyder Eugene I.
Will Thomas B.
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