GB434598A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB434598A GB434598A GB6967/34A GB696734A GB434598A GB 434598 A GB434598 A GB 434598A GB 6967/34 A GB6967/34 A GB 6967/34A GB 696734 A GB696734 A GB 696734A GB 434598 A GB434598 A GB 434598A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cap
- sealed
- lamp
- tube
- mercury
- 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
-
- 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
Landscapes
- Discharge Lamp (AREA)
Abstract
434,598. Discharge lamps. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London, and SCOTT, W. J., 16, Oval Road, Hilhnorton Paddox, Rugby. March 5, 1934, No. 6967. [Class 39 (i)] A high-pressure lamp contains a mixture of mercury and another vaporizable material such as cadmium, the mercury only being entirely vaporized and the unevaporated portion of the other material acting as the cathode of the lamp. Preferably the material is contained in a pocket 3, Fig. 1, in a metallic cap 2 sealed to each end of the lamp. Cooling fins 4 may be provided on the cap. The cap itself or projections from it may act as anodes. An annular metallic ring may be sealed in the tube in front of the cathode to prevent sputtering and blackening and to act as a starting electrode or grid, Fig. 4 (not shown). In Fig. 3 a shield 6 projecting from the cap 2 protects the seal and prevents blackening. The material may also be contained in a cylinder 5, Fig. 5, and the tube drawn down and sealed to the outside, or to a flange projecting from the cylinder, Fig. 6 (not shown). In a tube surrounded by a vacuum jacket, the pockets may project through the wall of the jacket.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6967/34A GB434598A (en) | 1934-03-05 | 1934-03-05 | Improvements in and relating to electric discharge devices |
US8561A US2042195A (en) | 1934-03-05 | 1935-02-27 | Electric discharge device |
FR786957D FR786957A (en) | 1934-03-05 | 1935-03-08 | Improvements to discharge tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6967/34A GB434598A (en) | 1934-03-05 | 1934-03-05 | Improvements in and relating to electric discharge devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB434598A true GB434598A (en) | 1935-09-05 |
Family
ID=9824107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6967/34A Expired GB434598A (en) | 1934-03-05 | 1934-03-05 | Improvements in and relating to electric discharge devices |
Country Status (3)
Country | Link |
---|---|
US (1) | US2042195A (en) |
FR (1) | FR786957A (en) |
GB (1) | GB434598A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2659833A (en) * | 1949-11-09 | 1953-11-17 | Hanovia Chemical & Mfg Co | Ultraviolet vapor electric discharge device |
US2732513A (en) * | 1952-01-31 | 1956-01-24 | anderson | |
NL93096C (en) * | 1953-04-08 | |||
US2892113A (en) * | 1958-05-12 | 1959-06-23 | Engelhard Ind Inc | Electrical discharge lamp |
US3405303A (en) * | 1964-12-29 | 1968-10-08 | Sylvania Electric Prod | Arc discharge tube having an electrode which contains a light-emitting metal |
HU179748B (en) * | 1974-01-15 | 1982-12-28 | Ferenc Puskas | Cathode of a metal ceramic sintered body produced by dust metalurgy for closing discharge tube of sodium vapour lamp and process for the production thereof |
-
1934
- 1934-03-05 GB GB6967/34A patent/GB434598A/en not_active Expired
-
1935
- 1935-02-27 US US8561A patent/US2042195A/en not_active Expired - Lifetime
- 1935-03-08 FR FR786957D patent/FR786957A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR786957A (en) | 1935-09-14 |
US2042195A (en) | 1936-05-26 |
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