GB402607A - Improvements in or relating to television and like systems - Google Patents
Improvements in or relating to television and like systemsInfo
- Publication number
- GB402607A GB402607A GB205/33A GB20533A GB402607A GB 402607 A GB402607 A GB 402607A GB 205/33 A GB205/33 A GB 205/33A GB 20533 A GB20533 A GB 20533A GB 402607 A GB402607 A GB 402607A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ray
- disc
- tube
- electrode
- gun
- 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
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract 2
- 229910052786 argon Inorganic materials 0.000 abstract 1
- 239000011324 bead Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910052756 noble gas Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
402,607. Cathode-ray tubes; television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London.- (Assignees of Batchelor, J. C. ; Edgewater Park, New Jersey, U.S.A.) Jan. 3, 1933, No. 205. Convention date, Jan. 6, 1932. [Classes 39 (i) and 40 (iii).] In a cathode-ray tube of a television receiver &c. in which the picture is reproduced by a ray of electrons scanning a fluorescent screen maintained at a high potential relatively to the electron gun at the other end of the tube, the distance from the screen to the adjacent tip of the gun does not exceed 4 inches and is not less than the largest dimension of the scanned surface, the area of this surface not exceeding 2 sq. ins. The short length of the ray reduces the spreading of the electrons with the result that a picture of good detail and brilliance and of area of, say, 1 sq. in., is obtained and may be projected by a lens system on to a large screen. The tube may be evacuated or filled with argon or other noble gas at a pressure of the order of 2.10<-4> mm. The gas does not focus the ray, but neutralizes space-charges without introducing velocity modulation of the ray. The electron gun is formed by the indirectly heated cathode 22, the electrode 26 and a first anode 32 mounted on the electrode 26 by wires 40 and glass beads 38 and by a recessed, insulating, spacing ring 42. The high-voltage anode comprises a coating 16 on the wall of the tube and extends from the fluorescent screen nearly to the gun. The electrodes 26, 32 include apertured discs 28, 34, 36. A skirt 44 on the electrode 26 extends from the disc 28 nearly to the disc 34 to concentrate electrons passing the disc 28 on to the aperture in the disc 34. Specification 395,499 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US584924A US2114136A (en) | 1932-01-06 | 1932-01-06 | Cathode ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
GB402607A true GB402607A (en) | 1933-12-07 |
Family
ID=24339327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB205/33A Expired GB402607A (en) | 1932-01-06 | 1933-01-03 | Improvements in or relating to television and like systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US2114136A (en) |
GB (1) | GB402607A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB651386A (en) * | 1948-12-14 | 1951-03-14 | Cinema Television Ltd | Improvements in or relating to cathode ray tubes |
BE514668A (en) * | 1951-10-09 |
-
1932
- 1932-01-06 US US584924A patent/US2114136A/en not_active Expired - Lifetime
-
1933
- 1933-01-03 GB GB205/33A patent/GB402607A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2114136A (en) | 1938-04-12 |
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