GB431409A - Improvements in or relating to luminous electric discharge tubes - Google Patents
Improvements in or relating to luminous electric discharge tubesInfo
- Publication number
- GB431409A GB431409A GB67334A GB67334A GB431409A GB 431409 A GB431409 A GB 431409A GB 67334 A GB67334 A GB 67334A GB 67334 A GB67334 A GB 67334A GB 431409 A GB431409 A GB 431409A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- source
- blue light
- light
- general electric
- 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
- Discharge Lamp (AREA)
Abstract
431,409. Mercury vapour lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and RYDE, J. W., c/o General Electric Co., Ltd., Wembley, Middlesex. Jan. 8, 1934, No. 673. [Class 39 (i)] [See also Group XI] A means for illumination suitable for rendering flesh tints comprises a high-pressure mercury vapour lamp, a source of red light and also a source of blue light, the light from the lamp and that from the two sources being similarly distributed in all places where the illumination is intended to be used. The source of blue light may comprise a quantity of cadmium or zinc added to the mercuryvapour lamp, preferably in amount so small that the luminous efficiency of the lamp is not decreased by more than 10 per cent. The effective amount of the added metals, which depends on the temperature, may be adjusted by altering the area of a reflecting coating on the tube as described in Specifications 410,648 and 430,437. Alternatively, a second discharge tube, such as a low pressure mercury lamp or luminescent materials such as Balman's paint, zinc, magnesium, strontium or lithium sulphides may be employed as external sources of blue light. The source of red light may be phosphorescent material as described in Specification 401,846, [Group XI]. Luminescent materials may be combined with the mercury lamp in the manner described in Specification 431,408.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB67334A GB431409A (en) | 1934-01-08 | 1934-01-08 | Improvements in or relating to luminous electric discharge tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB67334A GB431409A (en) | 1934-01-08 | 1934-01-08 | Improvements in or relating to luminous electric discharge tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB431409A true GB431409A (en) | 1935-07-08 |
Family
ID=9708519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB67334A Expired GB431409A (en) | 1934-01-08 | 1934-01-08 | Improvements in or relating to luminous electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB431409A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650322A (en) * | 1945-09-24 | 1953-08-25 | Gen Electric | High-pressure metal vapor electric discharge lamp |
| US2659833A (en) * | 1949-11-09 | 1953-11-17 | Hanovia Chemical & Mfg Co | Ultraviolet vapor electric discharge device |
| US4439711A (en) * | 1978-12-28 | 1984-03-27 | Mitsubishi Denki Kabushiki Kaisha | Metal vapor discharge lamp |
-
1934
- 1934-01-08 GB GB67334A patent/GB431409A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650322A (en) * | 1945-09-24 | 1953-08-25 | Gen Electric | High-pressure metal vapor electric discharge lamp |
| US2659833A (en) * | 1949-11-09 | 1953-11-17 | Hanovia Chemical & Mfg Co | Ultraviolet vapor electric discharge device |
| US4439711A (en) * | 1978-12-28 | 1984-03-27 | Mitsubishi Denki Kabushiki Kaisha | Metal vapor discharge lamp |
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