| 摘要 |
454,182. Discharge apparatus. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Patent - Treuhand-Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin) June 13, 1935, No. 17085. Drawings to Specification. [Class 39 (i)] In electric discharge devices comprising a vitreous envelope and a conductor within the envelope extending from near one end of it to near the other end, the conductor being separated from the main space within the envelope by an insulating sheath, the insulating sheath is made of an enamel softening at a temperature much less than the softening temperature of the envelope, to which it is united at least in part. In one method, the conductor is coated with a thin layer (about 0À1 mm.) of enamel before being introduced into the envelope, and the envelope is then heated to produce union at the points of contact. In another method, the conductor is coated before introduction with powdered enamel deposited from a suspension, the enamel being fused by heating the envelope. The conductor may be in the form of a fine helix, forming an auxiliary electrode of a tubular discharge lamp. The construction enables the lamp to be bent to the desired shape after the conductor is sealed into it, and avoids the difficulty of introducing the conductor subsequently to the bending. The ends of the electrode may be free, or coated with enamel if a capacity connection is desired. The enamel may soften at 400-450‹ C. if the envelope is of glass softening at 600- 650‹ C. |
