Rotary encoder

Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact

Reexamination Certificate

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Details

C250S231140, C341S020000, C345S163000, C345S165000, C345S166000

Reexamination Certificate

active

07012201

ABSTRACT:
A rotary encoder includes a roller having substantially cylindrical shape, an inner shaft, a translucent cylindrical light guide shaft, a pair of holders, a light-emitting device, and a light-detecting device. The inner shaft is inserted and secured to a center hole of the roller, and has a slit at one end along a direction parallel to the axis thereof. The light guide shaft is inserted in the inner shaft so that one end of it is surrounded by the slit, and this guide has a first and second planes, and a first and second inclined planes. The first and second planes are formed on a lower side at both ends of the light guide shaft in parallel to the axis of the shaft. The first and second inclined planes are formed above the first and second planes at an angle of 45 degrees to the axis of the shaft, so that the two planes are substantially orthogonal to each other.

REFERENCES:
patent: 5070238 (1991-12-01), Ishihara et al.
patent: 5569912 (1996-10-01), Turk et al.
patent: 5828060 (1998-10-01), Juniman
patent: 6292113 (2001-09-01), Wu
patent: 6344643 (2002-02-01), Chen
patent: 6350984 (2002-02-01), Senda
patent: 6388212 (2002-05-01), Ishihara et al.
patent: 6555768 (2003-04-01), Deruginsky et al.
patent: 6930259 (2005-08-01), Jorgensen et al.
patent: 2001-084877 (2001-03-01), None

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