Citizen Watch Company, Ltd.

Tohio Kurihara

Nagao Mizutani

Yutaka Nishiyama

A position detector has first and second timing disks, each having at least one light-transmissive portion. The second timing disk is rotated at a predetermined speed ratio with respect to the first timing disk. A timing sensor is disposed in close proximity to the outer circumference of the first and second timing disks to provide a timing signal when both the light-transmissive portions of the first and second timing disks rotating at predetermined speeds simultaneously pass by the position of the timing sensor.

Growing community of inventors

Tokorozawa, Japan

Tohio Kurihara