GB679755A - Improvements in electric discharge lamps - Google Patents
Improvements in electric discharge lampsInfo
- Publication number
- GB679755A GB679755A GB789350A GB789350A GB679755A GB 679755 A GB679755 A GB 679755A GB 789350 A GB789350 A GB 789350A GB 789350 A GB789350 A GB 789350A GB 679755 A GB679755 A GB 679755A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- lamp
- mercury
- march
- electric discharge
- 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
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
679,755. Metal-vapour lamps. BRITISH THOMSON-HOUSTON CO., Ltd., and BEESON, E. J. G. March 20, 1951 [March 29, 1950], No. 7893/50. Class 39 (i). The quantity of mercury in a discharge lamp is adjusted so that when it is completely vaporized during operation, the voltage gradient in the arc lies between 1.25 and 2.5 volts/cm., the arc loading lying between 5 and 25 watts/cm. It is stated that under these conditions the maximum energy of the 4358 Š line is produced with a minimum of background radiation. In an example, the lamp envelope is 190 mm. long and 34 mm. in diameter, and the electrodes, of the type rendered thermionic by the discharge, are 160 mm. apart; the quantity of mercury is about 45 milligrams. The discharge may be started by heating the lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB789350A GB679755A (en) | 1950-03-29 | 1950-03-29 | Improvements in electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB789350A GB679755A (en) | 1950-03-29 | 1950-03-29 | Improvements in electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB679755A true GB679755A (en) | 1952-09-24 |
Family
ID=9841835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB789350A Expired GB679755A (en) | 1950-03-29 | 1950-03-29 | Improvements in electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB679755A (en) |
-
1950
- 1950-03-29 GB GB789350A patent/GB679755A/en not_active Expired
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