Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Reexamination Certificate
2006-09-05
2006-09-05
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
C033S366220
Reexamination Certificate
active
07100294
ABSTRACT:
A method of sensing tilt includes applying an electrical signal, such as voltage, current, a constant signal, or a time-varying signal to at least one electrode of a first set of electrodes and measuring an electrical parameter using at least one electrode of a second set of electrodes. The electrodes are disposed in a conductive medium within an envelope. The electrical parameter represents tilt relative to a first axis. The electrical roles of the first and second sets of electrodes are reversed to determine tilt relative to a second axis. No more than four electrodes are used to determine tilt relative to two axes. A tilt sensor includes an envelope, conductive medium in the envelope, and four electrodes. A method of making a tilt sensor includes providing at least four electrodes, forming an envelope to receive at least a portion of the electrodes, placing a conductive medium into the envelope, and sealing the conductive medium in the envelope.
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Goldsobel Norman
LeMarie Pascal
Fulton Christopher W.
Hoffmann & Baron , LLP
Spectron Glass and Electronics, Inc
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