GB724202A - Improvements relating to the production of light absorbent surfaces in electron discharge devices - Google Patents
Improvements relating to the production of light absorbent surfaces in electron discharge devicesInfo
- Publication number
- GB724202A GB724202A GB2266/52A GB226652A GB724202A GB 724202 A GB724202 A GB 724202A GB 2266/52 A GB2266/52 A GB 2266/52A GB 226652 A GB226652 A GB 226652A GB 724202 A GB724202 A GB 724202A
- Authority
- GB
- United Kingdom
- Prior art keywords
- substance
- exposed
- tube
- alkali metal
- lead
- 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
- H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube
-
- 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
- H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
724,202. Electrode materials and processing. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Jan. 16, 1953 [Jan. 28, 1952], No. 2266/52. Class 39 (1). An electron discharge device which includes a photo-electrically sensitive surface and a further surface liable to reflect unwanted light on the sensitive surface, is characterized in that the further surface is provided with a light absorbing coating comprising alkali metal and a substance which blackens when exposed to the alkali metal; the substance is preferably lead, but may be tin, germanium or silicon. In one embodiment the ion trap mesh 5 of a c.p.s. television pick-up tube is coated with lead 7 to a thickness of about 1000 A.U. by evaporation; during the sensitization of the mosaic 1 caesium is admitted to the tube in the normal way, and the lead coating is thus exposed to caesium. Other meshes mounted in front of the target of a television pick-up tube, e.g. a stabilizing mesh, may be treated in the same way, and the invention may also be applied to photo-electric cells. According to the Provisional Specification antimony or bismuth may be used for the substance which blackens when exposed to an alkali metal.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2266/52A GB724202A (en) | 1952-01-28 | 1952-01-28 | Improvements relating to the production of light absorbent surfaces in electron discharge devices |
US333528A US2843774A (en) | 1952-01-28 | 1953-01-27 | Light absorbent surfaces |
FR1070158D FR1070158A (en) | 1952-01-28 | 1953-01-28 | Light absorbing surface manufacturing process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2266/52A GB724202A (en) | 1952-01-28 | 1952-01-28 | Improvements relating to the production of light absorbent surfaces in electron discharge devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB724202A true GB724202A (en) | 1955-02-16 |
Family
ID=9736539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2266/52A Expired GB724202A (en) | 1952-01-28 | 1952-01-28 | Improvements relating to the production of light absorbent surfaces in electron discharge devices |
Country Status (3)
Country | Link |
---|---|
US (1) | US2843774A (en) |
FR (1) | FR1070158A (en) |
GB (1) | GB724202A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3188506A (en) * | 1959-11-23 | 1965-06-08 | Machlett Lab Inc | Cathode ray tube with signal plate connected to contact ring having envelope diameter |
US3268764A (en) * | 1963-01-09 | 1966-08-23 | Westinghouse Electric Corp | Radiation sensitive device |
US3402074A (en) * | 1963-03-22 | 1968-09-17 | Texas Instruments Inc | Energy converter |
US3400015A (en) * | 1963-03-22 | 1968-09-03 | Texas Instruments Inc | Energy converter |
NL8300359A (en) * | 1982-02-01 | 1983-09-01 | Nippon Sheet Glass Co Ltd | PLATE LENS AND METHOD FOR MANUFACTURING IT |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2495042A (en) * | 1947-11-12 | 1950-01-17 | Remington Rand Inc | Two-sided mosaic and method of manufacturing same |
-
1952
- 1952-01-28 GB GB2266/52A patent/GB724202A/en not_active Expired
-
1953
- 1953-01-27 US US333528A patent/US2843774A/en not_active Expired - Lifetime
- 1953-01-28 FR FR1070158D patent/FR1070158A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2843774A (en) | 1958-07-15 |
FR1070158A (en) | 1954-07-20 |
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