Mitsubishi Denki Kabushiki Kaisha

Katsunori Yagi

Shigeru Shiroyama

Keiichi Kusumoto

Atsuya Iwamoto

Hirohide Ikeda

Akio Seta

Kazuhide Nishii

The brush device of a starter with an overheat protection device of the present invention is provided with brush holders, brushes slidably supported in the brush holders, respectively, springs contacting one sides of the brushes to press the brushes in the radial, inner directions, and thermostats disposed on the brushes and adapted to interrupt energization of a starting motor with a power when the brushes exceed a predetermined temperature, caused by the starting motor continuously energized with the power supply.

Starter with overheat protection device including brush device

A starter comprises a thermostat for detecting increases in the temperature of brushes and interrupting the energizing of the starter, and a heat conducting member secured to the thermostat for conducting the heat of one of the brushes, the heat conducting member being attached to the brush. The heat conducting member may also be formed integrally with a brush holder. The heat conducting member may additionally be secured to a bracket so as to hold a base therebetween. The heat conducting member may also be composed of a metallic material having superior thermal conductivity, and may be copper or brass. An electrically insulating sheet may be held between the brush holders and the base as heat insulating material for preventing the transfer of heat from the brushes to the base. An electrically insulating tube may also be interposed between the thermostat and a first leg of the heat conducting member.

Engine starter with a thermostat for thermal protection

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Tokyo, Japan

Katsunori Yagi