GB504120A - Improvements in electrodes for high-pressure mercury-vapour discharge devices - Google Patents
Improvements in electrodes for high-pressure mercury-vapour discharge devicesInfo
- Publication number
- GB504120A GB504120A GB28331/37A GB2833137A GB504120A GB 504120 A GB504120 A GB 504120A GB 28331/37 A GB28331/37 A GB 28331/37A GB 2833137 A GB2833137 A GB 2833137A GB 504120 A GB504120 A GB 504120A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rod
- tungsten
- helix
- active material
- metal
- 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
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 5
- 239000011149 active material Substances 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 abstract 2
- 229910052721 tungsten Inorganic materials 0.000 abstract 2
- 239000010937 tungsten Substances 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
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
- Discharge Lamp (AREA)
Abstract
504,120. Metal vapour apparatus. GENERAL ELECTRIC, CO., Ltd., and FRANCIS, V. J. Oct. 18, 1937, No. 28331. [Class 39 (i)] In high-pressure metal-vapour discharge devices of the type comprising an electrode structure wherein a starting and a running electrode are parts of the same mechanically integral body as described in Specification 472,658, the electrode structure comprises a rod 4 of refractory conducting material preferably tungsten or thoria mixed with tungsten powder, an elongated body 2 consisting wholly or partly of thermionically active material more easily vaporizable than the metal of the rod 4, and a porous body 6, preferably a tungsten helix, for uniting the parts 4 and 2. The rod 4, which faces the discharge has its outer end coated with a sintered mixture of thoria and tungsten powder. The part 2 is a rod of thermionically active material supported by a helix 3 of tungsten wire, or alternatively a helix or a number of nested helices coated with the active material. Specifications 486,138 and 491,176 are referred to.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB28331/37A GB504120A (en) | 1937-10-18 | 1937-10-18 | Improvements in electrodes for high-pressure mercury-vapour discharge devices |
| US235483A US2217438A (en) | 1937-10-18 | 1938-10-17 | Electrode for high-pressure mercury-vapor discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB28331/37A GB504120A (en) | 1937-10-18 | 1937-10-18 | Improvements in electrodes for high-pressure mercury-vapour discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB504120A true GB504120A (en) | 1939-04-18 |
Family
ID=10273972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28331/37A Expired GB504120A (en) | 1937-10-18 | 1937-10-18 | Improvements in electrodes for high-pressure mercury-vapour discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2217438A (en) |
| GB (1) | GB504120A (en) |
Families Citing this family (12)
| 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 |
| US2492142A (en) * | 1945-10-17 | 1949-12-27 | Kenneth J Germeshausen | Electric system embodying coldcathode gaseous discharge device |
| FR957886A (en) * | 1945-11-23 | 1950-02-28 | ||
| US2670451A (en) * | 1950-01-12 | 1954-02-23 | Westinghouse Electric Corp | Short arc high-pressure vapor discharge lamp |
| US2682007A (en) * | 1951-01-11 | 1954-06-22 | Hanovia Chemical & Mfg Co | Compact type electrical discharge device |
| US2667592A (en) * | 1951-01-11 | 1954-01-26 | Hanovia Chemical & Mfg Co | Electrode for compact type electrical discharge devices |
| NL272789A (en) * | 1960-12-27 | |||
| US3548242A (en) * | 1967-05-16 | 1970-12-15 | Sylvania Electric Prod | High pressure electric discharge device and cathode |
| US3851207A (en) * | 1972-08-01 | 1974-11-26 | Gen Electric | Stabilized high intensity sodium vapor lamp |
| JPH04174951A (en) * | 1990-07-19 | 1992-06-23 | Tokyo Densoku Kk | Discharge tube |
| CA2721636C (en) * | 2008-04-30 | 2013-12-31 | Iwasaki Electric Co., Ltd. | Electrode for ultra-high pressure mercury lamp and ultra-high pressure mercury lamp |
| CN107785230B (en) * | 2017-11-02 | 2024-06-04 | 常州玉宇电光器件有限公司 | High-trigger cathode and manufacturing process thereof |
-
1937
- 1937-10-18 GB GB28331/37A patent/GB504120A/en not_active Expired
-
1938
- 1938-10-17 US US235483A patent/US2217438A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2217438A (en) | 1940-10-08 |
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