Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1983-09-27
1986-05-13
Little, Willis
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
73516LM, G01C 906
Patent
active
045877416
ABSTRACT:
An inclinometer includes a toroidal race containing a spherical ball free to move therein under the influence of gravity. Signal source and collector electrode assemblies are provided on opposite sides of the toroidal race, and the ball functions to capacitively couple signals on the source electrode to the collector electrode. In one embodiment the source electrode is shaped so that the amplitude of coupling varies with ball position in the race so that the signal on the collector electrode is indicative of ball position. In other embodiments the source electrode is continuous and symmetrical, and signals applied thereto are selected such that a property of the signal coupled to the collector electrode, such as signal phase, varies in accordance with ball position in the race. Three such inclinometers can be combined in a borehold sensor for drilling applications.
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Fraser Edward C.
Rorden Louis H.
Develco, Inc.
Little Willis
Zimmerman C. Michael
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