GB966526A - Improvements in or relating to the manufacture of low pressure mercury vapour fluorescent electric discharge lamps - Google Patents
Improvements in or relating to the manufacture of low pressure mercury vapour fluorescent electric discharge lampsInfo
- Publication number
- GB966526A GB966526A GB2120760A GB2120760A GB966526A GB 966526 A GB966526 A GB 966526A GB 2120760 A GB2120760 A GB 2120760A GB 2120760 A GB2120760 A GB 2120760A GB 966526 A GB966526 A GB 966526A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- pressure mercury
- mercury vapour
- relating
- manufacture
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
A phosphor suspension for coating the envelope of a low-pressure mercury vapour discharge lamp consists of 100 grs. of powdered phosphor having a particle size mainly in the range of 5-25 microns, 200 mls. of water and 12.5 mls. of an aqueous solution of ammonium polymethacrylate (Trade Name "Vulcastab"). The envelope is baked for approximately six minutes at a temperature of about 450 DEG to 500 DEG C., preferably initially at about 450 DEG C. and subsequently at 500 DEG C. with no intermediate cooling. Baking can be effected by introducing the envelope into an oven maintained at about 450 DEG C. and either raising the temperature to about 500 DEG C. or transferring the envelope to a region of the oven maintained at about 500 DEG C. A turret machine for coating a number of envelopes is described. Specification 917,832 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2120760A GB966526A (en) | 1960-06-16 | 1960-06-16 | Improvements in or relating to the manufacture of low pressure mercury vapour fluorescent electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2120760A GB966526A (en) | 1960-06-16 | 1960-06-16 | Improvements in or relating to the manufacture of low pressure mercury vapour fluorescent electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB966526A true GB966526A (en) | 1964-08-12 |
Family
ID=10158981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2120760A Expired GB966526A (en) | 1960-06-16 | 1960-06-16 | Improvements in or relating to the manufacture of low pressure mercury vapour fluorescent electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB966526A (en) |
-
1960
- 1960-06-16 GB GB2120760A patent/GB966526A/en not_active Expired
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