GB428084A - Improvements in and relating to electric discharge lamps - Google Patents
Improvements in and relating to electric discharge lampsInfo
- Publication number
- GB428084A GB428084A GB3113033A GB3113033A GB428084A GB 428084 A GB428084 A GB 428084A GB 3113033 A GB3113033 A GB 3113033A GB 3113033 A GB3113033 A GB 3113033A GB 428084 A GB428084 A GB 428084A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- vapour
- electric discharge
- apex
- cone
- 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
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/822—High-pressure mercury lamps
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
428,084. Metallic vapour lamps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, and MITCHELL, J. H., 8, Graham Road, Rugby. Nov. 8, 1933, Nos. 31130/33 and 6200/34. [Class 39 (i)] In a tubular electric discharge lamp containing metal vapour, the ends of the tube are drawn into a conical shape of reduced diameter, an electrode being mounted at the apex of each cone. Further improvement in the temperature distribution may be obtained by providing small reflectors in the form of a cap or washer of metal or metallized glass at the apex of each cone. Mixtures of mercury with cadmium, zinc, magnesium, tin, &c. may be employed, preferably in the unsaturated state, a vapour filling consisting of a mixture of about 63 per cent mercury and 37 per cent cadmium being given as an example. The metal, or an amalgam in the desired proportion, is formed into a wire and introduced through the exhaust tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3113033A GB428084A (en) | 1933-11-08 | 1933-11-08 | Improvements in and relating to electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3113033A GB428084A (en) | 1933-11-08 | 1933-11-08 | Improvements in and relating to electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB428084A true GB428084A (en) | 1935-05-07 |
Family
ID=10318444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3113033A Expired GB428084A (en) | 1933-11-08 | 1933-11-08 | Improvements in and relating to electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB428084A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650322A (en) * | 1945-09-24 | 1953-08-25 | Gen Electric | High-pressure metal vapor electric discharge lamp |
| US3007071A (en) * | 1958-04-29 | 1961-10-31 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Low-pressure mercury vapor discharge lamp |
-
1933
- 1933-11-08 GB GB3113033A patent/GB428084A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650322A (en) * | 1945-09-24 | 1953-08-25 | Gen Electric | High-pressure metal vapor electric discharge lamp |
| US3007071A (en) * | 1958-04-29 | 1961-10-31 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Low-pressure mercury vapor discharge lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB428084A (en) | Improvements in and relating to electric discharge lamps | |
| GB449862A (en) | Improvements in and relating to electric arc lamps | |
| GB428996A (en) | Improvements in luminous electric discharge tubes | |
| GB484328A (en) | Improvements in combinations of metal vapour electric discharge devices, adapted to emit radiation, and electric incandescent lamps | |
| GB434028A (en) | Improvements in and relating to electric discharge devices | |
| GB372154A (en) | Improvements in luminous electric discharge tubes | |
| GB446833A (en) | Improvements in and relating to electric discharge lamps | |
| GB429886A (en) | Improvements in and relating to electric lamps | |
| GB361804A (en) | Improvements in electric luminous discharge tubes | |
| GB373270A (en) | Improvements in or relating to electric discharge lamps | |
| GB365434A (en) | Improvements in luminous electric discharge tubes | |
| GB966608A (en) | Improvements in or relating to low pressure mercury vapour electric discharge lamps | |
| GB405605A (en) | Improvements in luminous electric discharge tubes | |
| GB406611A (en) | Improvements in luminous electric discharge tubes | |
| GB405514A (en) | Improvements in luminous electric discharge tubes | |
| GB526840A (en) | Improvements in high-pressure metal-vapour electric discharge lamps | |
| GB377554A (en) | Improvements in or relating to incandescent electric lamps | |
| GB495632A (en) | Improvements in or relating to electric high-pressure metal-vapour discharge tubes | |
| GB435709A (en) | Improvements in and relating to electric discharge devices | |
| GB471900A (en) | Electric metallic-vapour arc discharge lamps | |
| GB424895A (en) | Improvements in and relating to metallic vapour and gaseous electric discharge devices | |
| GB349261A (en) | Improvements in electric discharge lamps | |
| GB411683A (en) | Improvements in and relating to gaseous discharge lamps and methods of manufacturing the same | |
| GB492773A (en) | Improvements in and relating to electric photoflash lamps | |
| GB828604A (en) | Improvements in or relating to low pressure electric discharge lamps |