GB515154A - Improvements in electric discharge lamps - Google Patents
Improvements in electric discharge lampsInfo
- Publication number
- GB515154A GB515154A GB1561638A GB1561638A GB515154A GB 515154 A GB515154 A GB 515154A GB 1561638 A GB1561638 A GB 1561638A GB 1561638 A GB1561638 A GB 1561638A GB 515154 A GB515154 A GB 515154A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- ratio
- coated
- mixed
- manganese
- 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
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
Landscapes
- Luminescent Compositions (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
515,154. Discharge lamps. GENERAL ELECTRIC CO., Ltd., and JENKINS, H. G. May 25, 1938, No. 15616. [Class 39 (i)] Means for producing light comprises (1) one or more low-pressure mercury-vapour discharge devices, (2) luminescent zinc-beryllium silicate activated by manganese and (3) luminescent magnesium or zinc tungstate or both, the light from (2) and (3) when excited by (1) (and possibly from (1) itself) being mixed so as to produce light falling within a specified area of a trichroinatic diagram, which is stated to contain all known approximations to daylight. When the ratio of the fluxes from (3) and (2) is about 1.9 a close approximation to carbon dioxide light is obtained, when the manganese forms 2.75 per cent. of (2); warmer or colder light may be obtained by decreasing or increasing this ratio. The materials may be mixed and coated on the inside of a single discharge tube, equal weights giving the above optimum ratio; or separate tubes may be coated with each material. Specifications 469,732, 469,913, 480,356 and 495,706, [both in Group XX], are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1561638A GB515154A (en) | 1938-05-25 | 1938-05-25 | Improvements in electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1561638A GB515154A (en) | 1938-05-25 | 1938-05-25 | Improvements in electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB515154A true GB515154A (en) | 1939-11-28 |
Family
ID=10062350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1561638A Expired GB515154A (en) | 1938-05-25 | 1938-05-25 | Improvements in electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB515154A (en) |
-
1938
- 1938-05-25 GB GB1561638A patent/GB515154A/en not_active Expired
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