Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-04-04
2006-04-04
Allen, Stephone B. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C347S235000, C347S250000
Reexamination Certificate
active
07022977
ABSTRACT:
A main control section controls a movable beam a such that a passage position thereof may come to a center of a gap between a sensor SK and a sensor SJ, and measures an output difference between a sensor SP and a sensor SO. In this case, the main control section successively measures an output difference between the sensors SP and SO while moving the movable beam a to the center of the gap between the sensors SK and SJ. Similarly, the main control section controls the movable beam a such that the passage position thereof may come to a center of a gap between the sensor SJ and a sensor SI.
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Ishikawa Daisuke
Kawai Koji
Komiya Kenichi
Tanimoto Koji
Allen Stephone B.
Foley & Lardner LLP
Kabushiki Kaisha Toshiba
Toshiba Tec Kabushiki Kaisha
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