GB476260A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB476260A GB476260A GB1600236A GB1600236A GB476260A GB 476260 A GB476260 A GB 476260A GB 1600236 A GB1600236 A GB 1600236A GB 1600236 A GB1600236 A GB 1600236A GB 476260 A GB476260 A GB 476260A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coated
- switch
- electrodes
- heaters
- lamp
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
476,260. Discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., and SCOTT, W. J. June 8, 1936, No. 16002. [Class 39 (i)] A low-pressure gas or vapour discharge tube, such as a lamp, which is energized by A.C., comprises electrodes 1 each of which consists of a hollow conducting body which is closed at one end, is coated internally with electron-emitting material, and has an external surface comprising a refractory conducting material, and the electrode is arranged so that the closed end is nearest the positive column so that it is heated thereby. The electrode may consist of a molybdenum cylinder or box the inner surface of which is provided with a nickel layer or gauze coated with emissive material. A tungsten heater 2 is provided. The heaters, which may be coated with emissive material, form starting electrodes, and are connected in series with the main electrodes, a ballast impedance L and a heating resistance R of a vacuum switch. The series circuit is subsequently opened by the switch to disconnect the heaters and to generate a voltage impulse which starts the main discharge. The current through the lamp is adjusted by a condenser C and an impedance X connected in parallel with the switch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1600236A GB476260A (en) | 1936-06-08 | 1936-06-08 | Improvements in and relating to electric discharge devices |
| FR822797D FR822797A (en) | 1936-06-08 | 1937-06-08 | Improvements to discharge tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1600236A GB476260A (en) | 1936-06-08 | 1936-06-08 | Improvements in and relating to electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB476260A true GB476260A (en) | 1937-12-06 |
Family
ID=10069420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1600236A Expired GB476260A (en) | 1936-06-08 | 1936-06-08 | Improvements in and relating to electric discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR822797A (en) |
| GB (1) | GB476260A (en) |
-
1936
- 1936-06-08 GB GB1600236A patent/GB476260A/en not_active Expired
-
1937
- 1937-06-08 FR FR822797D patent/FR822797A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR822797A (en) | 1938-01-07 |
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