GB486138A - Improvements in electrodes for high-pressure metal vapour electric discharge devices - Google Patents
Improvements in electrodes for high-pressure metal vapour electric discharge devicesInfo
- Publication number
- GB486138A GB486138A GB159437A GB159437A GB486138A GB 486138 A GB486138 A GB 486138A GB 159437 A GB159437 A GB 159437A GB 159437 A GB159437 A GB 159437A GB 486138 A GB486138 A GB 486138A
- Authority
- GB
- United Kingdom
- Prior art keywords
- helix
- head
- shaft
- electrodes
- active material
- 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
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
Landscapes
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Lasers (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
486,138. Metallic-vapour apparatus. GENERAL ELECTRIC CO., Ltd., and FRANCIS, V. J. Jan. 19, 1937, Nos. 1594 and 10027. Drawings to Specification. [Class 39 (i)] A high - pressure metal - vapour discharge device has starting and running electrodes which form together a self-supporting, substantially cylindrical structure, the running electrode being a refractory metal head at one end, and the starting electrode, of thermionically active material supported by a metal, lying behind the head and forming part or the whole of a shaft terminating in and not substantially wider than the head. The shaft may be a straight rod carrying a sleeve, for example a helix, coated with active material; or a helix of refractory metal enclosing a rod consisting of or carrying active material, or an activated helix ; or the shaft may be of porous conductive material saturated with active material, for example a sintered mass of tungsten powder and alkaline earth oxides. The head is preferably of tungsten and may be a sphere or cylinder or a helix wound round the end of the shaft; or the end of the shaft may be wound into a spiral. A non-activated sleeve such as a helix may intervene between the head and the thermionically active portions. Auxiliary ignition electrodes may be provided. The conditions governing the distance between the starting and running electrodes are discussed. Specifications 425,597, 444,545, and 472,658 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB159437A GB486138A (en) | 1937-01-19 | 1937-01-19 | Improvements in electrodes for high-pressure metal vapour electric discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB159437A GB486138A (en) | 1937-01-19 | 1937-01-19 | Improvements in electrodes for high-pressure metal vapour electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486138A true GB486138A (en) | 1938-05-31 |
Family
ID=9724655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB159437A Expired GB486138A (en) | 1937-01-19 | 1937-01-19 | Improvements in electrodes for high-pressure metal vapour electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB486138A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429118A (en) * | 1943-03-24 | 1947-10-14 | Ray Lite Electrical Dev Corp | Electrode for fluorescent tubes |
| US2629065A (en) * | 1948-05-14 | 1953-02-17 | Westinghouse Electric Corp | Overwound filament |
| DE1047312B (en) * | 1953-03-21 | 1958-12-24 | Johann Buser | Discharge-heated sheathed glow electrode for electric gas and vapor discharge lamps, especially for high and high pressure mercury vapor burners |
| DE1047313B (en) * | 1954-09-22 | 1958-12-24 | Ets Claude Paz & Silva | Electrode for gas discharge lamps |
| EP0456907A2 (en) * | 1990-03-15 | 1991-11-21 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High-pressure discharge lamp |
| US5278474A (en) * | 1989-01-12 | 1994-01-11 | Tokyo Densoku Kabushiki Kaisha | Discharge tube |
-
1937
- 1937-01-19 GB GB159437A patent/GB486138A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429118A (en) * | 1943-03-24 | 1947-10-14 | Ray Lite Electrical Dev Corp | Electrode for fluorescent tubes |
| US2629065A (en) * | 1948-05-14 | 1953-02-17 | Westinghouse Electric Corp | Overwound filament |
| DE1047312B (en) * | 1953-03-21 | 1958-12-24 | Johann Buser | Discharge-heated sheathed glow electrode for electric gas and vapor discharge lamps, especially for high and high pressure mercury vapor burners |
| DE1047313B (en) * | 1954-09-22 | 1958-12-24 | Ets Claude Paz & Silva | Electrode for gas discharge lamps |
| US5278474A (en) * | 1989-01-12 | 1994-01-11 | Tokyo Densoku Kabushiki Kaisha | Discharge tube |
| EP0456907A2 (en) * | 1990-03-15 | 1991-11-21 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High-pressure discharge lamp |
| EP0456907A3 (en) * | 1990-03-15 | 1992-03-18 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | High-pressure discharge lamp |
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