GB870235A - Improvements in or relating to the manufacture of mosaic electrodes such as are utilised in television pick-up tubes - Google Patents
Improvements in or relating to the manufacture of mosaic electrodes such as are utilised in television pick-up tubesInfo
- Publication number
- GB870235A GB870235A GB3476556A GB3476556A GB870235A GB 870235 A GB870235 A GB 870235A GB 3476556 A GB3476556 A GB 3476556A GB 3476556 A GB3476556 A GB 3476556A GB 870235 A GB870235 A GB 870235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mesh
- deposited
- magnesium
- envelope
- conducting
- 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
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 abstract 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 3
- 229910052749 magnesium Inorganic materials 0.000 abstract 3
- 239000011777 magnesium Substances 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910001316 Ag alloy Inorganic materials 0.000 abstract 1
- 229910001152 Bi alloy Inorganic materials 0.000 abstract 1
- 229910052792 caesium Inorganic materials 0.000 abstract 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
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
- H01J29/36—Photoelectric screens; Charge-storage screens
- H01J29/39—Charge-storage screens
- H01J29/43—Charge-storage screens using photo-emissive mosaic, e.g. for orthicon, for iconoscope
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
870,235. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES Ltd. Oct. 28, 1957 [Nov. 14, 1956], No. 34765/56. Class 39(1). In a method of making a mosaic electrode in which material, subsequently converted b y oxidation to a caesium resistant metallic oxide, is first deposited on a surface 4 through a mesh 6 spaced from the surface a n d conducting material is then deposited with the mesh in contact with the surface, the first material is evaporated from a source 12 not only in the direction of the surface but towards the envelope and re-directed from there on to the surface so that areas of the surface opposite the bars of the mesh are also effectively covered. The envelope is heated at 15, or by eddy current heating of the wall anode 9 to reflect or re-evaporate the material. The first material deposited may be magnesium. The quantity of magnesium deposited may be measured by observing the quantity deposited on a relatively cool part of the glass wall, leaving a small gap in the heating element for this purpose, or a known weight of magnesium may be evaporated at a known distance from the surface. The envelope wall is heated to between 300‹C and 500‹C. The mesh is then electrostatically attracted to the surface and the conducting elementsformed, e.g. from an alloy of bismuth and silver. The mesh is then moved to a position in which during operation of the tube it acts as a stabilizing electrode. The conducting elements are finally caesiated. Specifications 686,465 and 740,751 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3476556A GB870235A (en) | 1956-11-14 | 1956-11-14 | Improvements in or relating to the manufacture of mosaic electrodes such as are utilised in television pick-up tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3476556A GB870235A (en) | 1956-11-14 | 1956-11-14 | Improvements in or relating to the manufacture of mosaic electrodes such as are utilised in television pick-up tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB870235A true GB870235A (en) | 1961-06-14 |
Family
ID=10369680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3476556A Expired GB870235A (en) | 1956-11-14 | 1956-11-14 | Improvements in or relating to the manufacture of mosaic electrodes such as are utilised in television pick-up tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB870235A (en) |
-
1956
- 1956-11-14 GB GB3476556A patent/GB870235A/en not_active Expired
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