Multi-axis trackball
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United States of America Patent
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-
Jun 12, 1990
Grant Date -
N/A
app pub date -
Jul 21, 1988
filing date -
Jul 21, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A first electromechanical transducer (40) generates a first electrical signal indicative of rotation of a ball (A) relative to a first axis. A second electromechanical transducer (50) generates a second electrical signal indicative of rotation of the ball relative to a second axis. A third electromechanical transducer (60) generates a third electrical signal indicative of rotation of an annular ring (12) around the periphery of the ball, i.e. a third axis. A resolver circuit (D) converts the first, second, and third electrical signals into an indication of movement or position along the first, second, and third axes.
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