GB697188A - Improvements in or relating to cathode-ray tubes - Google Patents
Improvements in or relating to cathode-ray tubesInfo
- Publication number
- GB697188A GB697188A GB8179/51A GB817951A GB697188A GB 697188 A GB697188 A GB 697188A GB 8179/51 A GB8179/51 A GB 8179/51A GB 817951 A GB817951 A GB 817951A GB 697188 A GB697188 A GB 697188A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- aperture
- ions
- stop
- cathode
- 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
- H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
Landscapes
- Electron Sources, Ion Sources (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
697,188. Ion-trapping in cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 9, 1951 [April 12, 1950], No. 8179/51. Class 39(i) In cathode ray receiv ing apparatus in whicl a magnetic field co operates with an ion trap electrode to remov ions from the beam the electrode is cylin drical and has an aper tured stop, and the stop is pervious to negativ ions to a progressively decreasing extent fron the edge of the aperture so that the residual ion spot on the screen ha blurred edges and is thus less noticeable. The aperture may be milled on one or as shown in Fig. 4 on two opposing portions; the milled portions may be of rectangular section instead of conical and may or may not be radial, Figs. 6, 7 (not shown), or small holes may be distributed as shown in Fig. 8. The ion trap may use crossed electric and magnetic fields so the electrons are undeviated and the ions intercepted, the transverse electric field being produced by inclining the end surface of the cylinder to the axis thereof at the point of entry, Fig. 1 (not shown), or may use a magnetic deflecting field only, in which case the electrode must be bent as shown in Fig. 2. The aperture in the stop need not be circular or concentrically positioned and the cylindrical electrode need not be of circular cross-section. The cylindrical electrode may be a conductive coating or a metal part of the tube wall.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL152898 | 1950-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB697188A true GB697188A (en) | 1953-09-16 |
Family
ID=19750491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8179/51A Expired GB697188A (en) | 1950-04-12 | 1951-04-09 | Improvements in or relating to cathode-ray tubes |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2617061A (en) |
| BE (1) | BE502471A (en) |
| CH (1) | CH290153A (en) |
| DE (1) | DE906110C (en) |
| FR (1) | FR1035278A (en) |
| GB (1) | GB697188A (en) |
| NL (2) | NL152898B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2717322A (en) * | 1952-11-01 | 1955-09-06 | Rca Corp | Cathode ray tube guns |
| NL87923C (en) * | 1953-02-13 | |||
| US3045141A (en) * | 1957-04-15 | 1962-07-17 | Rca Corp | Electron beam tube |
| DE2639033C3 (en) * | 1976-08-30 | 1981-07-23 | Gkss - Forschungszentrum Geesthacht Gmbh, 2000 Hamburg | Component in electrical vacuum devices that work with charge carrier beams and the process for their manufacture |
| US4137480A (en) * | 1977-03-31 | 1979-01-30 | Zenith Radio Corporation | Television picture tube with cathode coating erosion suppression |
| US4439395A (en) * | 1981-04-13 | 1984-03-27 | The United States Of America As Represented By The United States Department Of Energy | Neutral beamline with improved ion energy recovery |
| EP0116465B1 (en) * | 1983-02-09 | 1987-01-21 | Nec Corporation | Colour cathode ray tube |
| FR2613897B1 (en) * | 1987-04-10 | 1990-11-09 | Realisations Nucleaires Et | DEVICE FOR SUPPRESSING MICRO PROJECTIONS IN A VACUUM ARC ION SOURCE |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB458270A (en) * | 1935-06-24 | 1936-12-16 | Robert Vaughan Whelpton | Improvements in high speed cathode ray recording oscillographs |
| US2211613A (en) * | 1936-08-14 | 1940-08-13 | Hygrade Sylvania Corp | Cathode ray tube |
| BE434865A (en) * | 1938-06-13 | |||
| US2312723A (en) * | 1939-08-16 | 1943-03-02 | Bell Telephone Labor Inc | Electron discharge device |
| GB542496A (en) * | 1940-05-02 | 1942-01-12 | James Dwyer Mcgee | Improvements in or relating to electron discharge devices |
| BE470212A (en) * | 1946-01-24 | |||
| US2565357A (en) * | 1948-06-30 | 1951-08-21 | Rca Corp | Electron discharge device |
-
0
- NL NL85805D patent/NL85805C/xx active
- BE BE502471D patent/BE502471A/xx unknown
- NL NL686800109A patent/NL152898B/en unknown
-
1951
- 1951-03-23 US US217199A patent/US2617061A/en not_active Expired - Lifetime
- 1951-04-08 DE DEN3745A patent/DE906110C/en not_active Expired
- 1951-04-09 GB GB8179/51A patent/GB697188A/en not_active Expired
- 1951-04-10 CH CH290153D patent/CH290153A/en unknown
- 1951-04-10 FR FR1035278D patent/FR1035278A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE906110C (en) | 1954-03-11 |
| NL85805C (en) | |
| CH290153A (en) | 1953-04-15 |
| BE502471A (en) | |
| FR1035278A (en) | 1953-08-20 |
| NL152898B (en) | |
| US2617061A (en) | 1952-11-04 |
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