US3859613A - Focussing device for electronic tubes - Google Patents

Focussing device for electronic tubes Download PDF

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Publication number
US3859613A
US3859613A US435483A US43548374A US3859613A US 3859613 A US3859613 A US 3859613A US 435483 A US435483 A US 435483A US 43548374 A US43548374 A US 43548374A US 3859613 A US3859613 A US 3859613A
Authority
US
United States
Prior art keywords
rings
focussing
faces
magnet
axis
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 - Lifetime
Application number
US435483A
Other languages
English (en)
Inventor
Michel Blamoutier
Jean Fraleux
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Application granted granted Critical
Publication of US3859613A publication Critical patent/US3859613A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only

Definitions

  • a magnet of the kind indicated by the reference 1 produces, as those skilled in the art will be aware, a magnetic field whose shape corresponds with those which would be obtained, on the one hand, from a solid disc of diameter D, uniformly magnetised over the whole ofits surface, and on the other hand, from a solid disc of diameter D,- likewise uniformly magnetised over the whole of its surface but in the opposite direction to the preceding disc.
  • half the lines of force corresponding to this kind of configuration have been shown, the other half of these lines deriving from the first by a simple symmetry in relation to the axis XX.

Landscapes

  • Microwave Tubes (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
US435483A 1973-01-26 1974-01-22 Focussing device for electronic tubes Expired - Lifetime US3859613A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7302837A FR2215700B1 (de) 1973-01-26 1973-01-26

Publications (1)

Publication Number Publication Date
US3859613A true US3859613A (en) 1975-01-07

Family

ID=9113913

Family Applications (1)

Application Number Title Priority Date Filing Date
US435483A Expired - Lifetime US3859613A (en) 1973-01-26 1974-01-22 Focussing device for electronic tubes

Country Status (5)

Country Link
US (1) US3859613A (de)
JP (1) JPS604543B2 (de)
DE (1) DE2403627C3 (de)
FR (1) FR2215700B1 (de)
GB (1) GB1463892A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347254A (en) * 1993-03-08 1994-09-13 The United States Of America As Represented By The Secretary Of The Army Tubular structure having transverse magnetic field with gradient
US20090067059A1 (en) * 2007-09-11 2009-03-12 William Patrick Crabtree Device and method for altering the path of magnetic waves to record the activity thereof
US20100097291A1 (en) * 2007-09-11 2010-04-22 William Patrick Crabtree Device and method for altering the path of radio waves to record the image information available in said waves

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240100093A1 (en) 2021-02-05 2024-03-28 National University Corporation Kobe University Gamma delta t cells derived from induced pluripotent stem cells, and production method therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207961A (en) * 1963-09-25 1965-09-21 Gen Motors Corp Linear relay actuator
US3329915A (en) * 1964-08-12 1967-07-04 Siemens Ag Permanent magnet system for the bundled guidance of an electron beam over a relatively long path, especially for traveling wave tubes
US3781592A (en) * 1972-06-08 1973-12-25 Raytheon Co Radial magnetized magnet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB827968A (en) * 1956-03-05 1960-02-10 Plessey Co Ltd Improvements in magnetic focussing devices for cathode-ray tubes
GB835271A (en) * 1956-08-27 1960-05-18 Standard Telephones Cables Ltd Periodic magnetic electron beam focusing arrangement
US3283200A (en) * 1963-12-12 1966-11-01 Varian Associates High frequency electron discharge device having improved permanent magnetic focusing
DE1192753B (de) * 1964-01-24 1965-05-13 Magnetfab Bonn Gmbh Ringfoermiger Korrekturmagnet fuer Kathodenstrahlroehren
DE1564322C3 (de) * 1966-04-28 1975-04-17 Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn Zu einem Paar verbundene Ringmagnete für Kathodenstrahlröhren

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207961A (en) * 1963-09-25 1965-09-21 Gen Motors Corp Linear relay actuator
US3329915A (en) * 1964-08-12 1967-07-04 Siemens Ag Permanent magnet system for the bundled guidance of an electron beam over a relatively long path, especially for traveling wave tubes
US3781592A (en) * 1972-06-08 1973-12-25 Raytheon Co Radial magnetized magnet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347254A (en) * 1993-03-08 1994-09-13 The United States Of America As Represented By The Secretary Of The Army Tubular structure having transverse magnetic field with gradient
US20090067059A1 (en) * 2007-09-11 2009-03-12 William Patrick Crabtree Device and method for altering the path of magnetic waves to record the activity thereof
US20100097291A1 (en) * 2007-09-11 2010-04-22 William Patrick Crabtree Device and method for altering the path of radio waves to record the image information available in said waves
US9429631B2 (en) 2007-09-11 2016-08-30 William Patrick Crabtree Device and method for altering the path of radio waves to record the image information available in said waves

Also Published As

Publication number Publication date
DE2403627B2 (de) 1980-09-25
DE2403627C3 (de) 1981-05-27
FR2215700A1 (de) 1974-08-23
JPS604543B2 (ja) 1985-02-05
JPS49107171A (de) 1974-10-11
FR2215700B1 (de) 1976-05-14
GB1463892A (en) 1977-02-09
DE2403627A1 (de) 1974-08-01

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