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    • 13. 发明授权
    • Discharge tube having a double-tube type structure
    • 具有双管式结构的放电管
    • US5359255A
    • 1994-10-25
    • US918759
    • 1992-07-27
    • Koji KawaiShigeki IshiharaNaoki Masuda
    • Koji KawaiShigeki IshiharaNaoki Masuda
    • H01J9/24H01J61/34H01J61/35H01J5/16H01J1/52H01J61/30
    • H01J61/34H01J61/35H01J9/247
    • A discharge tube for emitting light of the present invention includes an inner bulb including a hollow portion for defining therein an arc discharge chamber which encloses therein gas for emitting light, the inner bulb further including a pair of electrodes and a pair of metal members each of which is connected to a corresponding one of the pair of electrodes, the pair of electrodes being projected in the arc discharge chamber from the inner bulb and the pair of metal members being projected outwardly of the inner bulb, the hollow portion having an outer diameter of a first value and an outer tube for sealingly enclosing therein the inner bulb, the outer tube including a small-diameter portion having an outer diameter of a second value which is equal to or smaller than the first value, wherein the inner bulb is held in the interior of the outer tube, with a gap being formed between an outer surface of the inner bulb and an inner surface of the outer tube, in such a manner that the outer tube supports the metal members projected outwardly of the inner bulb.
    • 本发明的发光用放电管包括:内灯泡,包括中空部分,用于在其中限定出包围用于发光的气体的电弧放电室,所述内灯泡还包括一对电极和一对金属构件, 其连接到所述一对电极中的相应一个电极,所述一对电极从所述内灯泡突出到所述电弧放电室中,并且所述一对金属构件从所述内灯泡向外突出,所述中空部分的外径为 第一值和外管,用于将内灯泡密封地封闭,外管包括具有等于或小于第一值的第二值的外径的小直径部分,其中内灯泡保持在 外管的内部,在内部灯泡的外表面和外管的内表面之间形成间隙,使得外部 r管支撑从内部灯泡向外突出的金属构件。