Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2007-02-27
2007-02-27
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C341S013000
Reexamination Certificate
active
10632359
ABSTRACT:
A motion encoder for use with a rotating key. The motion encoder allows the direction of rotation to be determined by providing elements having different characteristics for the transmission of a IR beam. These elements are arranged in a pattern that allows an IR beam impinging on the elements to trace a path detected as the rotating key turns. The beam being detected after changes in the reflected or transmitted beam indicating the direction of rotation of the beam.
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Patent Abstracts of Japan; “Rotary Encoder”; Pub. No. 08029202, Pub. Date Feb. 2, 1996.
Bick Andrew Raymond
Fermawi Maysara
Wingett Gary
Harrington & Smith PC
Nokia Corporation
Pyo Kevin
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