GB687617A - Electrode for electric low pressure discharge tubes - Google Patents
Electrode for electric low pressure discharge tubesInfo
- Publication number
- GB687617A GB687617A GB265951A GB265951A GB687617A GB 687617 A GB687617 A GB 687617A GB 265951 A GB265951 A GB 265951A GB 265951 A GB265951 A GB 265951A GB 687617 A GB687617 A GB 687617A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxide
- strontium
- barium
- oxides
- parts
- 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
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
- H01J61/0677—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material
Landscapes
- Discharge Lamp (AREA)
Abstract
687,617. Cathode materials. LUMALAMPAN AKTIEBOLAG. Feb. 2, 1951, No. 2659/51. Class 39(i) The electrode for a low pressure discharge tube comprises a metal base having a coating which consists of the oxides of calcium, thorium and zirconium and at least one of the oxides of barium and strontium, the quantity of zirconium oxide being less than that of the oxide of calcium or thorium. The proportions of the oxides of calcium, thorium and zirconium may be 4.5-5, 5-8 and 0.8-1 parts by weight respectively, and of the combined oxides of barium and strontium 1.4-11 parts but not more than 8.5 of barium oxide or 3.5 of strontium oxide. In the absence of strontium oxide there should be at least 7 parts of barium oxide, or in the absence of barium oxide at least 1.4 parts of strontium oxide. Specified proportions of the carbonate may be used. The coating may be inserted in a tungsten spiral so that it fills the spaces between the windings and the spiral may be wound to form a double or triple wound electrode used in a rectifier having argon at 4.5 mms. or in a fluorescent discharge lamp having argon at 4 mms.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH290128D CH290128A (en) | 1951-02-02 | 1950-10-30 | Electrode for low-pressure electric discharge tubes. |
| GB265951A GB687617A (en) | 1951-02-02 | 1951-02-02 | Electrode for electric low pressure discharge tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB265951A GB687617A (en) | 1951-02-02 | 1951-02-02 | Electrode for electric low pressure discharge tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB687617A true GB687617A (en) | 1953-02-18 |
Family
ID=9743484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB265951A Expired GB687617A (en) | 1951-02-02 | 1951-02-02 | Electrode for electric low pressure discharge tubes |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH290128A (en) |
| GB (1) | GB687617A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE535889A (en) * | 1954-02-26 |
-
1950
- 1950-10-30 CH CH290128D patent/CH290128A/en unknown
-
1951
- 1951-02-02 GB GB265951A patent/GB687617A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH290128A (en) | 1953-04-15 |
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