Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Reexamination Certificate
2010-07-19
2011-11-15
Bennett, G. Bradley (Department: 2841)
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
C033S366150, C033S366250
Reexamination Certificate
active
08056246
ABSTRACT:
An orientation sensor includes a measure of ferrofluid that moves as the orientation sensor moves. The movement of the ferrofluid, which lies over a number of coils, alters the magnetic permeability of the flux path around each coil. The orientation sensor determines a change in orientation by measuring a change in the voltage across each coil. The voltage across each coil changes as the inductance changes which, in turn, changes as the magnetic permeability of the flux path changes.
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French William
Gabrys Ann
Hopper Peter J.
Bennett G. Bradley
National Semiconductor Corporation
Pickering Mark C.
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