GB486502A - Improvements in and relating to metallic vapour discharge lamps - Google Patents
Improvements in and relating to metallic vapour discharge lampsInfo
- Publication number
- GB486502A GB486502A GB32994/36A GB3299436A GB486502A GB 486502 A GB486502 A GB 486502A GB 32994/36 A GB32994/36 A GB 32994/36A GB 3299436 A GB3299436 A GB 3299436A GB 486502 A GB486502 A GB 486502A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- loosely
- liquid
- discharge lamps
- solid
- 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
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
Landscapes
- Discharge Lamp (AREA)
Abstract
486,502. Discharge lamps. FREEDMAN, P., and CROMPTON PARKINSON, Ltd. Dec. 1, 1936, No. 32994. Drawings to Specification. [Class 39 (i)] Finely divided refractory electron-emissive material is loosely supported within a lamp, in which the vapour pressure exceeds 4 atmospheres, so that it is readily dispensed in the region of the discharge during normal use. Solid or liquid electrodes may be used, and the material, e.g. thorium oxide may be incorporated within the liquid electrode or may form a loosely held layer on a solid electrode which may also have a firmly adhering undercoating of electronemitting material. A tungsten wire electrode may be wound with a wire which loosely supports thorium oxide. An auxiliary filling of argon or neon or a mixture thereof may be provided and the liquid electrode may consist of mercury or a mercury amalgam. It is stated that secondary electrons are liberated by the collision of primary electrons and particles of the material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB32994/36A GB486502A (en) | 1936-12-01 | 1936-12-01 | Improvements in and relating to metallic vapour discharge lamps |
| US176962A US2194652A (en) | 1936-12-01 | 1937-11-29 | Metallic vapor discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB32994/36A GB486502A (en) | 1936-12-01 | 1936-12-01 | Improvements in and relating to metallic vapour discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486502A true GB486502A (en) | 1938-06-01 |
Family
ID=10347082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32994/36A Expired GB486502A (en) | 1936-12-01 | 1936-12-01 | Improvements in and relating to metallic vapour discharge lamps |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2194652A (en) |
| GB (1) | GB486502A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2670451A (en) * | 1950-01-12 | 1954-02-23 | Westinghouse Electric Corp | Short arc high-pressure vapor discharge lamp |
| BE636192A (en) * | 1962-08-17 | |||
| US3151922A (en) * | 1962-10-05 | 1964-10-06 | Gen Electric | Method of making a discharge lamp |
-
1936
- 1936-12-01 GB GB32994/36A patent/GB486502A/en not_active Expired
-
1937
- 1937-11-29 US US176962A patent/US2194652A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2194652A (en) | 1940-03-26 |
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