GB530176A - Improvements in or relating to electric discharge devices - Google Patents
Improvements in or relating to electric discharge devicesInfo
- Publication number
- GB530176A GB530176A GB17928/39A GB1792839A GB530176A GB 530176 A GB530176 A GB 530176A GB 17928/39 A GB17928/39 A GB 17928/39A GB 1792839 A GB1792839 A GB 1792839A GB 530176 A GB530176 A GB 530176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- thorium
- june
- lead
- discharge devices
- 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
- Discharge Lamp (AREA)
Abstract
530,176. Discharge lamps ; electrode materials. WESTINGHOUSE ELECTRICAL INTERNATIONAL CO. June 20, 1939, No. 17928. Convention date, June 24, 1938. [Class 39 (i)] Electrodes for discharge devices, especially high pressure mercury-vapour lamps, consist of a core of a highly emissive metal in metallic form surrounded by a screen of refractory metal with openings for the passage of electrons. The core is preferably of thorium, but uranium, zirconium, hafnium, titanium, rhodium, ruthenium, vanadium, ytterbium or iridium may be employed. Fig. 2 shows a core 9 of thorium carried on a lead 8 and surrounded by a tungsten helix 10. Fig. 4 shows a core 9 supported by a looped wire 14 attached to a cross-bar 13 on the lead 8. The screen consists of two co-axial tungsten helices 10, 12. The electrode may be used in a lamp having a mercury vapour filling with argon at a starting pressure of 20 mm. or neon at 100 mm.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US215578A US2241345A (en) | 1938-06-24 | 1938-06-24 | Electron emissive cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB530176A true GB530176A (en) | 1940-12-06 |
Family
ID=22803529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17928/39A Expired GB530176A (en) | 1938-06-24 | 1939-06-20 | Improvements in or relating to electric discharge devices |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2241345A (en) |
| FR (1) | FR856372A (en) |
| GB (1) | GB530176A (en) |
| NL (1) | NL65805C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2477279A (en) * | 1946-09-11 | 1949-07-26 | Hanovia Chemical & Mfg Co | Electrical discharge device |
| BE488975A (en) * | 1948-05-14 | |||
| BE502063A (en) * | 1950-03-22 | |||
| US2731581A (en) * | 1950-12-18 | 1956-01-17 | Krefft Hermann Eduard | Electrode for gaseous discharge lamps |
| 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 |
-
0
- NL NL65805D patent/NL65805C/xx active
-
1938
- 1938-06-24 US US215578A patent/US2241345A/en not_active Expired - Lifetime
-
1939
- 1939-06-15 FR FR856372D patent/FR856372A/en not_active Expired
- 1939-06-20 GB GB17928/39A patent/GB530176A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR856372A (en) | 1940-06-12 |
| NL65805C (en) | |
| US2241345A (en) | 1941-05-06 |
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