GB500869A - Improvements in or relating to the manufacture of luminous electric discharge tubes - Google Patents
Improvements in or relating to the manufacture of luminous electric discharge tubesInfo
- Publication number
- GB500869A GB500869A GB1968637A GB1968637A GB500869A GB 500869 A GB500869 A GB 500869A GB 1968637 A GB1968637 A GB 1968637A GB 1968637 A GB1968637 A GB 1968637A GB 500869 A GB500869 A GB 500869A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- walls
- willemite
- powdered
- electrodes
- 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
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
500,869. Discharge lamps. ELECTROLUMINATION, Ltd., and RANGABE, A. R. July 16, 1937, No. 19686. [Class 39 (i)] A luminous discharge tube has a filling of pure neon at a pressure below 2 mm. (1 mm. is referred to in an example), and has the inner face of the tube coated, with a powdered luminescent material, e.g. synthetic Willemite, calcium tungstate or both, and the electrodes coated with materials of low work function, e.g. oxides of strontium or barium or both, so as effectively to overcome any tendency to sputtering. The tube is 16-16 mm. in diameter and six feet long ; the electrodes are sheet iron or nickel to which a paste of barium peroxide is applied inside and out and dissociated by eddy current heating, as described in Specification 500,890, [Group XV]. A binder is applied in vapour form from a heated container, being carried into the tube by an aircurrent and condensed on its walls ; the powdered willemite is then shaken over the walls, and the coating consolidated by baking. The running current is 30 milliamperes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1968637A GB500869A (en) | 1937-07-16 | 1937-07-16 | Improvements in or relating to the manufacture of luminous electric discharge tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1968637A GB500869A (en) | 1937-07-16 | 1937-07-16 | Improvements in or relating to the manufacture of luminous electric discharge tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB500869A true GB500869A (en) | 1939-02-16 |
Family
ID=10133503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1968637A Expired GB500869A (en) | 1937-07-16 | 1937-07-16 | Improvements in or relating to the manufacture of luminous electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB500869A (en) |
-
1937
- 1937-07-16 GB GB1968637A patent/GB500869A/en not_active Expired
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