| 摘要 |
Thermionic cathodes for alternating cycle gas discharge devices have a pair of spaced supports, a filament connected between them, and supported on each conductor one or more thin metal members providing emission material of low work function at their surfaces, the surface area and mass of the members being such that they operate at a temperature at which they emit thermionically without overheating. The filament is directly heated while the thermionic emitting metal members are heated by the discharge thus providing good starting, long life, low cathode fall at high current levels, and cathode symmetry.
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