| 摘要 |
476,132. Metallic - vapour apparatus. GENERAL ELECTRIC CO., Ltd. (Patent- Treuhand-Ges. f³r Electrische Gl³hlampen) Aug. 25, 1936, No. 23330. [Class 39 (i)] To initiate the main discharge positive ions gener. ated by an auxiliary discharge are con centrated on to the liquid cathode 2 by means of a magnetic or electrostatic field. The auxiliary discharge is produced between a thermionic cathode 6 anc an anode 7, anc the positive ions are concentrated by using separately or together one or more negative diaphragms 8 and a coil 9. Con trol of the moment of starting is effected by controlling the auxiliary discharge |
