发明授权
US4736078A Method for processing vacuum switch and vacuum switch processed by the
method
失效
采用该方法处理真空开关和真空开关的方法
- 专利标题: Method for processing vacuum switch and vacuum switch processed by the method
- 专利标题(中): 采用该方法处理真空开关和真空开关的方法
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申请号: US045754申请日: 1987-04-28
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公开(公告)号: US4736078A公开(公告)日: 1988-04-05
- 发明人: Koichi Yasuoka , Tohru Tamagawa , Eiji Kaneko , Mitsutaka Homma , Satoru Yanabu , Takumi Funahashi
- 申请人: Koichi Yasuoka , Tohru Tamagawa , Eiji Kaneko , Mitsutaka Homma , Satoru Yanabu , Takumi Funahashi
- 申请人地址: JPX Kanagawa
- 专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人地址: JPX Kanagawa
- 优先权: JPX58-187069 19831007; JPX59-43151 19840307
- 主分类号: H01H1/02
- IPC分类号: H01H1/02 ; H01H33/66
摘要:
A vacuum switch having two main electrodes encased in a vacuum vessel to be operable in opening and closing the main electrodes, is provided with a contact piece made of a copper-chromium alloy secured or formed on at least one of the main electrodes. The operational property of the main electrodes is substantially improved by flowing and interrupting an electric current of a predetermined current density for a number of times through the two main electrodes for improving surface condition of the contact piece by forming a recrystallized layer over the outer surface of the contact piece.
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