GB780474A - Improvements in electric discharge lamps - Google Patents
Improvements in electric discharge lampsInfo
- Publication number
- GB780474A GB780474A GB460153A GB460153A GB780474A GB 780474 A GB780474 A GB 780474A GB 460153 A GB460153 A GB 460153A GB 460153 A GB460153 A GB 460153A GB 780474 A GB780474 A GB 780474A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- envelope
- supports
- electrode
- feb
- 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
- H01J61/30—Vessels; Containers
- H01J61/34—Double-wall vessels or containers
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
780,474. Discharge lamps. CROMPTON PARKINSON, Ltd. Feb. 16, 1954 [Feb. 18, 1953], No. 4601/53. Class 39(1). A high pressure metallic vapour discharge lamp has a closed inner glass envelope 2 separated from and held in position within an outer glass envelope 1 by tubular glass supports 12, 20 sealed to the outer envelope, packings 14, 23 of heat and shock insulating material being inserted between the supports and the inner envelope. The glass supports 12 and 20 have flared ends 13 and 22. A hole 15 is provided in the tube 12. In the construction shown In Fig. 1 a starting electrode 7 is connected by a resistance 8 to the lead 6 to the electrode 4. In the construction shown in Fig. 2 the lead 6 to the electrode 4 passes through the body of the inner envelope at 25 and is sheathed with glass 26 which acts as a starting electrode. The glass of the inner envelope 2 may contain a large proportion of quartz and the glass of the outer envelope very little quartz. Fillings of mercury, cadmium or sodium are referred to. According to the Provisional Specification one of the tubular glass supports can be absent and the outer envelope reduced in diameter to form a support for the inner envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB460153A GB780474A (en) | 1953-02-18 | 1953-02-18 | Improvements in electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB460153A GB780474A (en) | 1953-02-18 | 1953-02-18 | Improvements in electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB780474A true GB780474A (en) | 1957-08-07 |
Family
ID=9780243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB460153A Expired GB780474A (en) | 1953-02-18 | 1953-02-18 | Improvements in electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB780474A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143674A (en) * | 1983-06-14 | 1985-02-13 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | High-pressure discharge lamp |
| US4629929A (en) * | 1982-02-10 | 1986-12-16 | Mitsubishi Denki Kabushiki Kaisha | Metal vapor discharge lamp |
| WO2011104104A1 (en) * | 2010-02-26 | 2011-09-01 | Osram Gesellschaft mit beschränkter Haftung | High-pressure discharge lamp with graduated outer bulb |
-
1953
- 1953-02-18 GB GB460153A patent/GB780474A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4629929A (en) * | 1982-02-10 | 1986-12-16 | Mitsubishi Denki Kabushiki Kaisha | Metal vapor discharge lamp |
| GB2143674A (en) * | 1983-06-14 | 1985-02-13 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | High-pressure discharge lamp |
| WO2011104104A1 (en) * | 2010-02-26 | 2011-09-01 | Osram Gesellschaft mit beschränkter Haftung | High-pressure discharge lamp with graduated outer bulb |
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