Komatsu Corporation

Toyo Denki Seizo Kabushiki Kaisha

Toyo Denki Seizo Kabushiki Kaisha and Komatsu Ltd.

Hidetoshi Takei

Teruo Minami

Takumi Nozaka

Offset condition detecting device for detecting offset condition of pantographs from overhead contact wires by means of electric current detected by a contact element mounted on the pantograph and insulated therefrom. The detection is made electrically and in case of emergency the pantographs are lowered down at high speed to prevent damage of pantographs of trolley-assisted vehicles.

Offset detecting device for trolley-assisted vehicles

A collector device for trolley-assisted vehicles having a pantograph operating circuit acting to deenergize the pantograph operating electromagnetic valve, when a driver inadvertently intends to leave the vehicle while pantographs are in the working position by automatically bringing the pantographs down to leave overhead contact wire thus to avoid electric shock accident.

Growing community of inventors

Ayase, Japan

Hidetoshi Takei