GB1197556A - Improvements in or relating to Cathode-Ray Tubes - Google Patents

Improvements in or relating to Cathode-Ray Tubes

Info

Publication number
GB1197556A
GB1197556A GB10371/69A GB1037169A GB1197556A GB 1197556 A GB1197556 A GB 1197556A GB 10371/69 A GB10371/69 A GB 10371/69A GB 1037169 A GB1037169 A GB 1037169A GB 1197556 A GB1197556 A GB 1197556A
Authority
GB
United Kingdom
Prior art keywords
electrodes
edges
cathode
lens
high permeability
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
Application number
GB10371/69A
Inventor
Nicholas P Pappadis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zenith Electronics LLC
Original Assignee
Zenith Radio Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zenith Radio Corp filed Critical Zenith Radio Corp
Publication of GB1197556A publication Critical patent/GB1197556A/en
Expired legal-status Critical Current

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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/506—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube guns in delta or circular configuration

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

1,197,556. Cathode - ray display tubes. ZENITH RADIO CORP. 26 Feb., 1969 [10 May, 1968], No. 1037]/69. Heading H1D. The edges of coaxial cylindrical electrodes forming an electrostatic lens are shaped to screen the lens from the effect of changes accumulating on the envelope of a cathode ray tube. Fig. 1 shows a colour television tube of the shadow mask-type using three electron guns each of which includes a lens system G3, G4, G5; the edges of the outer electrodes G3 and G5 are curved back at 31 and the edges of the centre electrodes G4 are curved in concentric arcs 30. The spacing between the electrodes should be small compared with the radial length of the flanges 30. When a blue lateral connection magnet is provided, the G3 electrodes of the red and green guns should preferably be of material of high permeability to protect these beams from the influence of the magnet; the G4 electrodes should also be of high permeability material to shield the lenses from stray magnetic fields.
GB10371/69A 1968-05-10 1969-02-26 Improvements in or relating to Cathode-Ray Tubes Expired GB1197556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72816368A 1968-05-10 1968-05-10

Publications (1)

Publication Number Publication Date
GB1197556A true GB1197556A (en) 1970-07-08

Family

ID=24925680

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10371/69A Expired GB1197556A (en) 1968-05-10 1969-02-26 Improvements in or relating to Cathode-Ray Tubes

Country Status (4)

Country Link
US (1) US3501668A (en)
DE (1) DE1922867A1 (en)
ES (1) ES367021A1 (en)
GB (1) GB1197556A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2031486A1 (en) * 1970-06-25 1971-12-30 Siemens Ag Electrostatic lens, especially for electrostatic vidicon
JPS5743972B1 (en) * 1971-02-05 1982-09-18
NL7404365A (en) * 1974-04-01 1975-10-03 Philips Nv CATHOD BEAM TUBE FOR DISPLAYING COLORED IMAGES.
JPH0656739B2 (en) * 1984-07-26 1994-07-27 株式会社東芝 Electron gun

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971118A (en) * 1958-11-10 1961-02-07 Sylvania Electric Prod Electron discharge device

Also Published As

Publication number Publication date
ES367021A1 (en) 1971-06-16
DE1922867A1 (en) 1969-11-27
US3501668A (en) 1970-03-17

Similar Documents

Publication Publication Date Title
GB1239891A (en) Colour display cathode-raytube
GB1459656A (en) Cathode-ray tube having magnetic shield
GB1170805A (en) Cathode Ray Tubes
GB1197556A (en) Improvements in or relating to Cathode-Ray Tubes
GB993270A (en) Cathode ray tube
GB974304A (en) Cathode ray tube apparatus
GB1250288A (en)
GB1496949A (en) Cathode ray tube
US4455542A (en) Device for displaying television pictures including a deflection unit therefor
GB1242881A (en) Cathode ray tube
GB1016140A (en) Cathode ray tube
US3098942A (en) Magnetic centering device for cathode ray tubes
GB1073898A (en) Beam convergence apparatus for plural-beam cathode-ray tubes
GB1442723A (en) Colour cathode ray tube apparatus
GB1003165A (en)
GB477539A (en) Improvements in or relating to magnetic deflecting means for electron discharge devices
CA1009702A (en) Shadow mask and associated phosphor screen for color cathode ray tube
GB1223779A (en) Guard for a parallax barrier of a cathode ray tube having a patterned screen
GB1236045A (en) Manufacture of colour cathode ray tube screens
GB469897A (en) Improvements in or relating to cathode ray tubes
US3728569A (en) Cathode-ray tube
GB442724A (en) Braun tube
GB865666A (en) Improvements in or relating to cathode ray tubes
GB1056320A (en) Cathode-ray tube devices
GB1371301A (en) Method of manufacturing a colour display cathode ray tube

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees