GB714440A - Improvements in or relating to cathode-ray tubes - Google Patents
Improvements in or relating to cathode-ray tubesInfo
- Publication number
- GB714440A GB714440A GB27516/51A GB2751651A GB714440A GB 714440 A GB714440 A GB 714440A GB 27516/51 A GB27516/51 A GB 27516/51A GB 2751651 A GB2751651 A GB 2751651A GB 714440 A GB714440 A GB 714440A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- grid
- fixed
- volts
- potential
- 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
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
- H01J31/04—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with only one or two output electrodes with only two electrically independant groups or electrodes
Landscapes
- Microwave Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Electron Beam Exposure (AREA)
Abstract
714,440. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 23, 1951 [Nov. 27, 1950]. No. 27516/51. Class 39(1) In a cathode-ray tube in which a ribbon beam is deflected over one or more collecting electrodes, the deflecting system comprises two flared plates, one or each of the plates, to which a varying control voltage is applied, being divided into two or more parts 4, 5, at least the part nearest a subsequent grid electrode 6 at a potential of zero or a few volts being given a fixed positive voltage greater than the highest value of the varying control voltage. In the arrangement shown plate 3 is kept at a fixed potential of 150 volts, plate 4 varies from 70 to 220 volts, and plate 5 is fixed at 300 volts. Grid 6 is followed by positive perforated collector electrode 7, suppressor grid 8 connected to 6, and collector anode 9. When the beam is deflected towards plate 4 the electrons repelled by grid 6 go to plate 5. Stray electrons striking plate 4 will generate secondaries which go to plate 5 so that the net current to plate 4 is almost zero. The right hand deflection plate may be divided into several parts alternately connected to a variable and fixed voltage. Both plates may be subdivided, as when both carry varying voltages but when one of them is to be kept at a fixed potential preferably only the variable potential one is subdivided. Grid 6 has a lens effect so as to focus electrons on to the slots in electrode 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL157562 | 1950-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB714440A true GB714440A (en) | 1954-08-25 |
Family
ID=19750511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27516/51A Expired GB714440A (en) | 1950-11-27 | 1951-11-23 | Improvements in or relating to cathode-ray tubes |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2716204A (en) |
| BE (1) | BE507380A (en) |
| CH (1) | CH297599A (en) |
| DE (1) | DE865765C (en) |
| FR (1) | FR1045480A (en) |
| GB (1) | GB714440A (en) |
| NL (1) | NL86332C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3125699A (en) * | 1964-03-17 | vacuum tube with linear dynamic | ||
| US3946268A (en) * | 1974-10-21 | 1976-03-23 | American Optical Corporation | Field emission gun improvement |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB413757A (en) * | 1933-01-26 | 1934-07-26 | Marconi Wireless Telegraph Co | Improvements in or relating to cathode ray tubes |
| NL40870C (en) * | 1933-09-30 | |||
| FR798693A (en) * | 1934-12-04 | 1936-05-23 | Fernseh Ag | Wide-angle electric deflector system, without spot distortion, for cathode ray oscillographs, in particular for television tubes |
| GB486041A (en) * | 1936-11-30 | 1938-05-30 | Marconi Wireless Telegraph Co | Improvements in or relating to electrical time base circuits |
| US2236860A (en) * | 1938-05-13 | 1941-04-01 | Philips Nv | Electron discharge device |
| US2273546A (en) * | 1939-10-10 | 1942-02-17 | Rca Corp | Receiving system |
| US2553735A (en) * | 1950-01-21 | 1951-05-22 | Zenith Radio Corp | Push-pull output tube |
-
0
- BE BE507380D patent/BE507380A/xx unknown
- NL NL86332D patent/NL86332C/xx active
-
1951
- 1951-11-23 US US257717A patent/US2716204A/en not_active Expired - Lifetime
- 1951-11-23 GB GB27516/51A patent/GB714440A/en not_active Expired
- 1951-11-24 DE DEN4729A patent/DE865765C/en not_active Expired
- 1951-11-26 FR FR1045480D patent/FR1045480A/en not_active Expired
- 1951-11-26 CH CH297599D patent/CH297599A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2716204A (en) | 1955-08-23 |
| CH297599A (en) | 1954-03-31 |
| FR1045480A (en) | 1953-11-26 |
| NL86332C (en) | |
| DE865765C (en) | 1953-02-05 |
| BE507380A (en) |
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