Apparatus for monitoring rotation of an object about an axis
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United States of America Patent
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May 25, 2004
Grant Date -
Jul 10, 2003
app pub date -
Jan 4, 2002
filing date -
Jan 4, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sensor (36) for monitoring rotation of an object (16) about an axis (20) comprises a switch member (40) that is urged into a neutral position and is movable relative to the object (16). A direction of movement of the switch member (40) relative to the object (16) is indicative of a direction of rotation of the object (16). Inertia of the switch member (40) during initial rotation of the object (16) results in relative movement of the switch member (4) away from the neutral position. Centrifugal force during object (16) rotation further enhances the relative movement of the switch member (40). The sensor (36) also comprises a device (56) for monitoring a direction of movement of the switch member (40) and for providing a signal indicative thereof.
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