GB544733A - Improvements in the manufacture of photo-sensitive electrodes - Google Patents
Improvements in the manufacture of photo-sensitive electrodesInfo
- Publication number
- GB544733A GB544733A GB2689/41A GB268941A GB544733A GB 544733 A GB544733 A GB 544733A GB 2689/41 A GB2689/41 A GB 2689/41A GB 268941 A GB268941 A GB 268941A GB 544733 A GB544733 A GB 544733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mercury
- pressure
- mosaic
- feb
- heated
- 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 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 5
- 229910052753 mercury Inorganic materials 0.000 abstract 5
- 239000010953 base metal Substances 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- 229910000497 Amalgam Inorganic materials 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- 229910001610 cryolite Inorganic materials 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000007772 electrode material Substances 0.000 abstract 1
- 238000004070 electrodeposition Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000010445 mica Substances 0.000 abstract 1
- 229910052618 mica group Inorganic materials 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 230000014624 response to red light Effects 0.000 abstract 1
- 230000001235 sensitizing effect Effects 0.000 abstract 1
- 239000010902 straw Substances 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/02—Details
- H01J40/04—Electrodes
- H01J40/06—Photo-emissive cathodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
544,733. Photo sensitive electrode materials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 27, 1941, No. 2689. Convention date, Feb. 27, 1940. Drawings to Specification. [Class 39 (i)] The base metal, preferably silver, of a photosensitive electrode is subjected to the action of mercury to form an amalgam, which is then heated to drive off the mercury and sensitized. This process produces voids and fissures in the base metal, which reduces secondary emission and light reflection ; the response to red light is also reduced. In one form, a mosaic deposited on a sheet of mica, with or without a thin intervening film of cryolite, is supported over a beaker containing a few drops of mercury, which is heated to form vapour which amalgamates with the mosaic. Subsequent heating for one minute at 600‹ C. drives off the mercury. If the electrode is continuous, the mercury may be applied by dipping or by electrodeposition. In sensitizing the apparatus is baked at 390-410‹ C. until a residual pressure of one micron is reached and for a further five minutes. A glow discharge in oxygen, first at 1.2 mm. pressure and then at 1.8 mm. pressure oxidizes the silver to a bright red. Caesium is introduced and the excess removed by baking at 263-285‹ C. until the cathode turns straw colour.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US320995A US2256341A (en) | 1940-02-27 | 1940-02-27 | Photoelectric device and method of manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB544733A true GB544733A (en) | 1942-04-24 |
Family
ID=23248714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2689/41A Expired GB544733A (en) | 1940-02-27 | 1941-02-27 | Improvements in the manufacture of photo-sensitive electrodes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2256341A (en) |
| CH (1) | CH225051A (en) |
| GB (1) | GB544733A (en) |
| NL (1) | NL59871C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2476590A (en) * | 1943-07-03 | 1949-07-19 | Westinghouse Electric Corp | Cathode coating |
| US3002847A (en) * | 1958-09-11 | 1961-10-03 | Robert A Shaffer | Process for producing a fine mesh pattern on a substrate |
-
0
- NL NL59871D patent/NL59871C/xx active
-
1940
- 1940-02-27 US US320995A patent/US2256341A/en not_active Expired - Lifetime
-
1941
- 1941-02-27 GB GB2689/41A patent/GB544733A/en not_active Expired
- 1941-04-03 CH CH225051D patent/CH225051A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2256341A (en) | 1941-09-16 |
| CH225051A (en) | 1942-12-31 |
| NL59871C (en) |
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