Off-switching of liquid-metal arc switching device by auxiliary arc liquid-metal starvation
    5.
    发明授权
    Off-switching of liquid-metal arc switching device by auxiliary arc liquid-metal starvation 失效
    液氮金属切换装置通过辅助ARC液体金属离合开关切换

    公开(公告)号:US3586904A

    公开(公告)日:1971-06-22

    申请号:US3586904D

    申请日:1969-04-21

    CPC classification number: H01J13/50 H01J13/06 H01J13/52 H01J2893/0088

    Abstract: An enclosed vessel containing one or more main anodes, one or more auxiliary anodes, a cathode, and means for maintaining a low pressure in the tube comprises a liquid-metal arc switching device. The cathode is fed with a metal which is liquid at convenient temperatures, so that limited quantities of the metal are present and available on the cathode for arcing. The interior of the vessel is maintained at a low background pressure so that during nonconduction, vacuum space insulation is provided between the anodes and the cathode. Arc initiation is accomplished by any convenient initiator, and the arc runs upon the small amount of liquid metal fed at an appropriate rate to the cathode. Arc extinction is accomplished by causing current to flow from the cathode to the auxiliary anodes at rates substantially higher than the main anode current. This causes consumption of the liquid metal at a higher rate than the liquid-metal feed rate, with consequent arc extinction by cathode starvation.

    Orientation independent ignitron
    9.
    发明授权
    Orientation independent ignitron 失效
    定向独立点火器

    公开(公告)号:US4264839A

    公开(公告)日:1981-04-28

    申请号:US47672

    申请日:1979-06-12

    Inventor: John R. Bayless

    CPC classification number: H01J13/06

    Abstract: Orientation independent ignitron 10 has a cooled cathode 28 which carries thin mercury film 58 which is held in place by surface tension forces so that it is independent of orientation. Ignitor 48 starts conduction which continues until mercury exhaustion or shut off by an external circuit. During nonconductive portions of the duty cycle, the mercury recondenses on the cooled cathode 30.

    Abstract translation: 取向独立的点火器10具有冷却的阴极28,其承载薄的水银膜58,该薄膜通过表面张力保持在适当的位置,使得其不依赖于取向。 点火器48开始传导,持续到汞耗​​尽或外部电路切断。 在占空比的非导电部分期间,冷却的阴极30上的汞再生浓度。

    Liquid metal cathode with single capillary flow impedance
    10.
    发明授权
    Liquid metal cathode with single capillary flow impedance 失效
    液体金属阴极与单毛细管流动阻力

    公开(公告)号:US3579011A

    公开(公告)日:1971-05-18

    申请号:US3579011D

    申请日:1969-01-08

    Inventor: HYMAN JULIUS JR

    CPC classification number: H01J13/08 H01J13/06 H01J13/14 H01J2893/0083

    Abstract: The liquid metal cathode is employed as a cathodic electron source in arc discharges. A small liquid metal pool serves as the arcing material, and when it is kept small, improved electron-toatom emission ratios are obtained, as well as gravity independence. However, when such a small pool is employed, feed to the pool must be free of feed rate perturbations. Otherwise, an instability in the level of the mercury in the pool results. The present invention obtains feed rate stability by providing a feed passage with a diameter which is everywhere larger than that of the feed channel which finally discharges to the pool. Feed flow impedance is provided by an elongated capillary feed channel.

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