Tokyo Shibaura Denki Kabushiki Kaisha

Eiichi Takayanagi

Hideo Suzuki

Tsutomu Okutomi

Satoru Yanabu

Hisashi Yoshino

Masachika Iida

Nobuo Kawashima

Kazuyoshi Kuwabara

In a vacuum circuit breaker of the type comprising coil electrodes for producing longitudinal magnetic flux and contacts made of an Ag-WC sintered alloy, the intensity of the magnetic field is made to be higher than 50 gausses/I.sub.B.

Vacuum circuit breaker

Disclosed is an electrical contact of composite layer type which comprises an interrupting layer consisting of Cu-W alloy, Cu-WC alloy or Cu-W-WC alloy containing 20 to 60 wt % of Cu and being bonded to the top surface of a base plate, and a contacting layer consisting of Ag-WC alloy, Ag-W alloy or Ag-W-WC alloy containing 20 to 60 wt % of Ag and being bonded to the top surface of said interrupting layer.

Electrical contact

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Yokosuka, Japan

Eiichi Takayanagi