GB482070A - Electric discharge lamp - Google Patents
Electric discharge lampInfo
- Publication number
- GB482070A GB482070A GB8369/37A GB836937A GB482070A GB 482070 A GB482070 A GB 482070A GB 8369/37 A GB8369/37 A GB 8369/37A GB 836937 A GB836937 A GB 836937A GB 482070 A GB482070 A GB 482070A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- march
- rare gas
- electrodes
- lamp
- 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
482,070. Discharge lamps. VEREINIGTE GLUHLAMPEN UND ELEKTRIZITATS AKT.-GES. March 22, 1937, No. 8369. Convention date, March 21,1936. [Class 39 (i)] In a lamp provided with incandescent electrodes of refractory metal, e.g. tungsten, a filling of rare gas and mercury, and a discharge path located in a tube which is formed of quartz or the like, has an internal diameter of less than 5 mms., and is capable of withstanding an internal pressure greater than one atmosphere and a drop of 500 volts per cm., at least one electrode, or the relevant part of it, is made so small that, when in use it is heated to a temperature of at least 2200‹ C. and emits one per cent of the total light. Blackening may be prevented by 10 per cent to 15 per cent of nitrogen added to the rare gas, or by applying cryolite to the electrodes or to the inner surface of the lamp.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT482070X | 1936-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB482070A true GB482070A (en) | 1938-03-23 |
Family
ID=3674955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8369/37A Expired GB482070A (en) | 1936-03-21 | 1937-03-22 | Electric discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR819273A (en) |
| GB (1) | GB482070A (en) |
-
1937
- 1937-03-16 FR FR819273D patent/FR819273A/en not_active Expired
- 1937-03-22 GB GB8369/37A patent/GB482070A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR819273A (en) | 1937-10-13 |
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