Non-contacting joystick

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5421694
SERIAL NO

08064301

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A non-contacting joystick includes a control shaft being universally movable about a Z-axis. A spherical conducting body is attached to an end of the control shaft. A plurality of conducting plates are disposed circumjacent to the spherical body. A charging power supply supplies electrical energy of a first polarity to the spherical body and electrical energy of a second polarity to the plurality of conducting plates. Each conducting plate forms a variable capacitor with the spherical body. The capacitance value of each variable capacitor is a function of the displacement of the spherical body relative to the Z-axis. A circuit produces a plurality of position signals, each position signal being responsive to a capacitance value of a respective variable capacitor. The position signals indicate the relative position of the spherical body.

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Patent Owner(s)

Patent OwnerAddress
CATERPILLAR INC100 N E ADAMS STREET PEORIA IL 61629-9510

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baker, Thomas M Peoria, IL 18 352
Codina, George North Hollywood, CA 28 391
Franzen, Larry H Dunlap, IL 2 57
Szentes, John F Peoria, IL 13 417

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