GB478410A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB478410A
GB478410A GB14540/37A GB1454037A GB478410A GB 478410 A GB478410 A GB 478410A GB 14540/37 A GB14540/37 A GB 14540/37A GB 1454037 A GB1454037 A GB 1454037A GB 478410 A GB478410 A GB 478410A
Authority
GB
United Kingdom
Prior art keywords
electrodes
tube
cathode
ray tubes
magnetized
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
GB14540/37A
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
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 Zeiss Ikon AG filed Critical Zeiss Ikon AG
Publication of GB478410A publication Critical patent/GB478410A/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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • 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

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Details Of Television Scanning (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

478,410. Cathode-ray tubes. ZEISS IKON AKT.-GES. May 25, 1937, No. 14540. Convention date, May 28, 1936. [Class 39 (i)] A cathode-ray tube is provided with electrical lenses for concentrating the beam and with permanent magnets arranged within the tube which co-operate to form a magnetic lens. The permanent magnets are preferably constituted by the electrodes serving as the electric lens, these being in the form of annular members of ferromagnetic material, such as steel or Heusler alloys. The electrodes may be arranged and magnetized as shown in Fig. 2, and the anode 3 may also be magnetized; alternatively, the electrode 4 may be cylindrical and in a further modification the electrode 3 may also surround the Wehnelt cylinder 2, as shown in Fig. 3, the potential surfaces of the magnetic lens being rendered approximately spherical. Further magnetic electrodes may be provided and the whole tube may be surrounded by a protective iron casing.
GB14540/37A 1934-07-30 1937-05-25 Improvements in or relating to cathode ray tubes Expired GB478410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1934L0086318 DE689388C (en) 1934-07-30 1934-07-30 Arrangement for deflecting the cathode ray in Braun tubes

Publications (1)

Publication Number Publication Date
GB478410A true GB478410A (en) 1938-01-18

Family

ID=6537785

Family Applications (2)

Application Number Title Priority Date Filing Date
GB20616/35A Expired GB445665A (en) 1934-07-30 1935-07-19 Ray deflection system for braun tubes
GB14540/37A Expired GB478410A (en) 1934-07-30 1937-05-25 Improvements in or relating to cathode ray tubes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB20616/35A Expired GB445665A (en) 1934-07-30 1935-07-19 Ray deflection system for braun tubes

Country Status (4)

Country Link
US (1) US2149101A (en)
DE (1) DE689388C (en)
FR (1) FR792659A (en)
GB (2) GB445665A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555850A (en) * 1948-01-28 1951-06-05 Nicholas D Glyptis Ion trap
US2552342A (en) * 1949-11-17 1951-05-08 Clarostat Mfg Co Inc Magnetic structure for use in ion-traps
NL89376C (en) * 1950-06-17
US2581657A (en) * 1950-07-26 1952-01-08 Myron R Heppner Focusing and centering device for cathode-ray tubes
BE508323A (en) * 1951-01-11
US2619607A (en) * 1951-03-10 1952-11-25 Glaser Steers Corp Internal focusing device
US2664514A (en) * 1952-03-10 1953-12-29 All Star Products Inc Magnetic focusing mechanism
NL207373A (en) * 1953-05-30
US2785330A (en) * 1953-10-19 1957-03-12 Nat Video Corp Internal pole piece arrangement for a magnetically-focused cathode ray tube
NL189142B (en) * 1954-07-12 Kansai Paint Co Ltd METHOD OF PREVENTING THE ADHESION OF ORGANISMS.
NL200488A (en) * 1954-09-22
US3050653A (en) * 1955-07-28 1962-08-21 Itt Magnetic focusing device
US3020440A (en) * 1959-06-25 1962-02-06 Rca Corp Electron beam device
JPS547236A (en) * 1977-06-20 1979-01-19 Hitachi Ltd High-resolution cathode-ray tube
US4329618A (en) * 1980-05-29 1982-05-11 Rca Corporation Horizontal deflection enhancement for kinescopes
GB2079530B (en) * 1980-07-02 1985-04-11 Hitachi Ltd Magnetic focussing arrangement in a cathode ray tube
FR2641899A1 (en) * 1989-01-17 1990-07-20 Thomson Tubes Electroniques ELECTRON GUN WITH AN ACTIVE DEVICE PRODUCING A MAGNETIC FIELD IN THE VICINITY OF THE CATHODE
NL1026006C2 (en) * 2004-04-22 2005-10-25 Fei Co Particle-optical device provided with lenses with permanent magnetic material.

Also Published As

Publication number Publication date
FR792659A (en) 1936-01-07
DE689388C (en) 1940-03-19
US2149101A (en) 1939-02-28
GB445665A (en) 1936-04-16

Similar Documents

Publication Publication Date Title
GB478410A (en) Improvements in or relating to cathode ray tubes
GB515308A (en) Improvements in or relating to magnetic electron lenses
GB480948A (en) Improvements in or relating to cathode ray tubes
GB440810A (en) Cathode ray tube
GB668161A (en) Improvements in cathode ray tubes
GB543752A (en) Improvements in electron discharge devices
GB934661A (en) Improvements in and relating to cathode ray tubes
GB431246A (en) Improvements in or relating to braun tubes
GB603939A (en) Improvements in or relating to electric discharge tubes having a directional electron beam
GB521439A (en) Focussing magnets for cathode ray tubes
GB564003A (en) Electron lens
ES487233A1 (en) Magnetic electron lens for cathode-ray tube.
GB691156A (en) Improvements in or relating to corpuscular ray apparatus
GB477539A (en) Improvements in or relating to magnetic deflecting means for electron discharge devices
GB699830A (en) Improvements in magnetic electron lenses
GB613145A (en) Improvements in or relating to electric discharge tubes
GB447947A (en) Improvements in and relating to electric discharge devices
GB461450A (en) Improvements in or relating to electric discharge devices
GB729611A (en) Improvements in or relating to electron discharge devices
GB451724A (en) Improvement in electric oscillation generator
GB728900A (en) Improvements in or relating to electron gun structures for use in cathode ray tubes
GB442724A (en) Braun tube
GB517680A (en) Improvements in or relating to magnetic lenses for electron beam apparatus
GB747707A (en) Improvements relating to electron guns
GB403671A (en) Improvements in or relating to cathode ray and like electric discharge devices