| 摘要 |
469,279. Thermal switches. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. fur Elektrische Gl³hlampen) June 16, 1936, No. 16773. [Class 38 (v)] [Also in Group XL] In an electric discharge device having a gas filling at low pressure, a thermionic electrode 2 and a thermo-sensitive switch 11 operated by heat from the electrode, the switch is enclosed in a thin wall, sealed, glass container which is either highly evacuated or has a hydrogen filling at a pressure above 100 mm., so that when the switch opens no sparking occurs. |
