GB383889A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB383889A GB383889A GB13623/32A GB1362332A GB383889A GB 383889 A GB383889 A GB 383889A GB 13623/32 A GB13623/32 A GB 13623/32A GB 1362332 A GB1362332 A GB 1362332A GB 383889 A GB383889 A GB 383889A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver
- coating
- cathode
- light
- ray tubes
- 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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
Abstract
383,889. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London.- (Assignees of Zworykin, V. K.; 416, Warwick Road, Haddonfield, and Batchelor, J. C. ; Edgewater Park, both in New Jersey, U.S.A.) May 11, 1932, No. 13623. Convention date, June 30, 1931. [Class 39 (i).] Parts of the structure of cathode-ray tubes are made non-reflective to light emitted by other parts during the operation of the tube. In a sealed glass tube with an " electron gun " 12 producing the cathode-ray 13, with a rayfocusing anode constituted by a silver coating 15 on the wall 10 and with a fluorescent screen 11, the gun 12 and wall 10 with its coating 15 are made non-reflective to light from the screen 11. The contrast between light and dark parts of a television image on the screen 11 is thus increased by the elimination of the luminous background normally produced by reflected light. The coating 15 and the gun 12 may be coated with carbon using a water colloidal solution and evacuating the tube at 500‹ C. Alternatively, the silver coating may be coated with a black layer of silver sulphide or selenide by treatment with hydrogen sulphide or selenide gas or with a solution of selenium in carbon disulphide. Tellurium may replace the selenium ; silver telluride may also be formed by treating the silver with tellurium vapour.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US547904A US1988469A (en) | 1931-06-30 | 1931-06-30 | Cathode ray apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB383889A true GB383889A (en) | 1932-11-24 |
Family
ID=24186624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13623/32A Expired GB383889A (en) | 1931-06-30 | 1932-05-11 | Improvements in or relating to cathode ray tubes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1988469A (en) |
| DE (1) | DE673467C (en) |
| FR (1) | FR739278A (en) |
| GB (1) | GB383889A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE748013C (en) * | 1939-11-08 | 1944-10-23 | Piston for a Branun tube for receiving or sending images |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL164276B (en) * | 1951-09-27 | Sandoz Ag | PROCESS OF PREPARING A 1,3-DIPHENYL PYRAZOLINE, OF A PREPARATION FOR OPTICAL BLEACHING OF FIBER MATERIALS BY DISSOLVING ONE OR SOME OF THESE PYRAZOLINS IN WATER AND PROCESS FOR OPTICAL BLEACHING OF FIBER MATERIALS 1,3 -DIPHENYLPYRAZOLINS AND OPTICALLY BLEACHED FIBER MATERIALS OBTAINED BY APPLICATION OF LATEST METHOD. | |
| NL7510274A (en) * | 1975-09-01 | 1977-03-03 | Philips Nv | PROCEDURE FOR MANUFACTURE OF A CATHODE NOZZLE TUBE WITH AN INTERNAL CONDUCTIVE COVER, DEVICE FOR PERFORMING THE METHOD AND TUBE OBTAINED ACCORDING TO THIS PROCESS. |
-
1931
- 1931-06-30 US US547904A patent/US1988469A/en not_active Expired - Lifetime
-
1932
- 1932-05-11 GB GB13623/32A patent/GB383889A/en not_active Expired
- 1932-06-28 DE DER85259D patent/DE673467C/en not_active Expired
- 1932-06-30 FR FR739278D patent/FR739278A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE748013C (en) * | 1939-11-08 | 1944-10-23 | Piston for a Branun tube for receiving or sending images |
Also Published As
| Publication number | Publication date |
|---|---|
| US1988469A (en) | 1935-01-22 |
| FR739278A (en) | 1933-01-09 |
| DE673467C (en) | 1939-03-25 |
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