GB767554A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB767554A GB767554A GB71/55A GB7155A GB767554A GB 767554 A GB767554 A GB 767554A GB 71/55 A GB71/55 A GB 71/55A GB 7155 A GB7155 A GB 7155A GB 767554 A GB767554 A GB 767554A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lacquer
- axle
- bulb
- motor
- vertical
- 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
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/18—Luminescent screens
- H01J29/28—Luminescent screens with protective, conductive or reflective layers
Landscapes
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
<PICT:0767554/III/1> A method of forming a thin lacquer of film on a water-wetted phosphor screen of a cathode-ray tube prior to aluminizing, comprises introducing an amount of liquid lacquer into the bulb and rotating the bulb about an axis which varies relative to the vertical so that the lacquer runs over the screen in a spiral path. The bulb 21 is clamped to a carrier bar 19 mounted on an axle 18 which can be rotated by motor 16. The axle 18 is carried on a horizontal axle 12 which can be rotated slowly by motor 15 through worm 14 and pinion 13. In operation, the axle 18 is first held horizontal for insertion of the lacquer; it is then raised to 35 degrees from the vertical and its rotation started at 10 r.p.m., motor 15 then moves it slowly at 1/3 r.p.m. to the vertical and back to 35 degrees; the lacquer remaining after the double spiral is then poured off. After draining, the screen is dried in two stages, first by moist air which dries the lacquer while retarding the evaporation of the underlying water, second by warm dry air to evaporate the water through the dry lacquer film. Suitable lacquers are isobutyl methacrylate or butyl methacrylate in toluene, or nitrocellulose.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US767554XA | 1954-01-05 | 1954-01-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB767554A true GB767554A (en) | 1957-02-06 |
Family
ID=22133984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB71/55A Expired GB767554A (en) | 1954-01-05 | 1955-01-03 | Improvements in or relating to cathode ray tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB767554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2236428A (en) * | 1989-09-20 | 1991-04-03 | Samsung Electronic Devices | Process for coating phosphor slurry on a cathode ray tube |
-
1955
- 1955-01-03 GB GB71/55A patent/GB767554A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2236428A (en) * | 1989-09-20 | 1991-04-03 | Samsung Electronic Devices | Process for coating phosphor slurry on a cathode ray tube |
| GB2236428B (en) * | 1989-09-20 | 1994-03-30 | Samsung Electronic Devices | Process for coating phosphor slurry on a cathode ray tube |
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