GB531867A - Improvements in electric discharge devices - Google Patents
Improvements in electric discharge devicesInfo
- Publication number
- GB531867A GB531867A GB2267739A GB2267739A GB531867A GB 531867 A GB531867 A GB 531867A GB 2267739 A GB2267739 A GB 2267739A GB 2267739 A GB2267739 A GB 2267739A GB 531867 A GB531867 A GB 531867A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- electrode
- main
- producing
- specifications
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
- H05B41/22—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps having an auxiliary starting electrode
Landscapes
- Discharge Lamp (AREA)
Abstract
531,867. Discharge lamps. GENERAL ELECTRIC CO., Ltd., and PIRANI, M. Aug. 4, 1939, No. 22677. [Class 39 (i)] In an electric discharge device having a long envelope with an activated electrode at each end heated-at least at starting-independently of the main discharge and with a rare gas filling to which mercury may be added, starting of the discharge is effected by (i) producing ions along substantially the whole of the discharge path and (ii) means independent of the means in (i) and of the main discharge producing a "hot spot" on the main electrodes during the part of each alternating cycle immediately before the main discharge starts. The means for producing the ions along the tube may be of the kind described in Specification 523,839; the "hot spots" are formed on each electrode by a pointed conductor separated by a small gap from that electrode and connected through an impedance with the other electrode. The main electrodes consist of tungsten helices filled with two or more separated pieces of porcelain-like material obtained by sintering together barium oxide and aluminium oxide. Dimensions of an embodiment are given. Arrangements described in Specifications 376,208, 379,991, 383,580, 403,428, 406,620, 440,945 and 462,363 are discussed. Specifications 505,670 and 506,919 also are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2267739A GB531867A (en) | 1939-08-04 | 1939-08-04 | Improvements in electric discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2267739A GB531867A (en) | 1939-08-04 | 1939-08-04 | Improvements in electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB531867A true GB531867A (en) | 1941-01-13 |
Family
ID=10183318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2267739A Expired GB531867A (en) | 1939-08-04 | 1939-08-04 | Improvements in electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB531867A (en) |
-
1939
- 1939-08-04 GB GB2267739A patent/GB531867A/en not_active Expired
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