Mirror orientation control means
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United States of America Patent
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Aug 15, 1989
Grant Date -
N/A
app pub date -
May 4, 1988
filing date -
May 4, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mirror housing is provided with two motor driven gear nuts each of which comprises a conductive material which however has a high resistance, and each of which engages a conductive wiper and threads on a respective screw shaft non-rotationally coupled to a mirror holder, one gear nut being operable in a direction to tilt a mirror in an horizontal plane and the other in a direction to tilt a mirror in a vertical plane, and conductors contact the ends of the gear nuts, so that when a voltage is applied across them, the voltage on the conductive wiper will be a function of the positions of the screw shafts in their nuts, thereby constituting position sensing means.
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