GB472275A - Improvements relating to electric discharge lamps - Google Patents
Improvements relating to electric discharge lampsInfo
- Publication number
- GB472275A GB472275A GB873936A GB873936A GB472275A GB 472275 A GB472275 A GB 472275A GB 873936 A GB873936 A GB 873936A GB 873936 A GB873936 A GB 873936A GB 472275 A GB472275 A GB 472275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- electrodes
- seals
- discharge lamps
- quartz tube
- 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
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
-
- 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
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
472,275. Discharge lamps. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., and ALDINGTON, J. N. March 20, 1936, No. 8379. [Class 39 (i)] A vapour lamp has thermionic electrodes, a glass envelope and a quartz tube 6 which extends at least between the electrodes and has its ends tapered to conform with the tapered ends of the vessel. The quartz tube may fit the envelope as closely as mechanical irregularities will allow. Each main electrode 5 consists of a helix of coiled tungsten wire which encloses a core of alkaline earth and embraces at one end the molybdenum wire 3 to which it is spotwelded. The tube 6 may be extended so that it is virtually closed by the leading-in wires or by the pinches and is provided with partitions 7 ; it maintains the temperature of the seals. During operation, excess mercury is present and serves to protect the seals. The internal surface of the ends of the envelope may be platinized. One or more starting electrodes 9 may be provided. The lamp may be mounted within a transparent or translucent envelope which is evacuated or filled with hydrogen, nitrogen, oxygen or a mixture of gases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB873936A GB472275A (en) | 1936-03-20 | 1936-03-20 | Improvements relating to electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB873936A GB472275A (en) | 1936-03-20 | 1936-03-20 | Improvements relating to electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB472275A true GB472275A (en) | 1937-09-20 |
Family
ID=9858333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB873936A Expired GB472275A (en) | 1936-03-20 | 1936-03-20 | Improvements relating to electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB472275A (en) |
-
1936
- 1936-03-20 GB GB873936A patent/GB472275A/en not_active Expired
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