Hitachi, Ltd.

Kazuhiko Kawauchi

Katsuya Teranishi

Nobuo Mitsui

Akinori Watanabe

Takeshi Oohira

Shoichi Nakao

A driving system for moving paths or escalators which use an endles chain adapted to be circulated between a path for transporting passengers, comprising a first and a second sprocket disposed at one end portion and substantially middle portion of the path, respectively, a first and a second induction motor coupled respectively to the first and second sprockets and each having the same rating output the sum of which is selected to be substantially equal to a maximum capacity of the system, an induction coupling interposed between the second sprocket and the second induction motor, means for detecting a current flow through the first induction motor, means for setting a reference value, and a thyristor amplifier for exciting the induction coupling in response to an excess developed when an output of the detecting means exceeds the reference value.

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Katsuta, Japan

Kazuhiko Kawauchi