JPS56156653A - Electro-magnetic focusing type cathode ray tube - Google Patents

Electro-magnetic focusing type cathode ray tube

Info

Publication number
JPS56156653A
JPS56156653A JP5944480A JP5944480A JPS56156653A JP S56156653 A JPS56156653 A JP S56156653A JP 5944480 A JP5944480 A JP 5944480A JP 5944480 A JP5944480 A JP 5944480A JP S56156653 A JPS56156653 A JP S56156653A
Authority
JP
Japan
Prior art keywords
magnetic
permanent magnet
focusing
members
bimetal
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.)
Granted
Application number
JP5944480A
Other languages
Japanese (ja)
Other versions
JPS6310862B2 (en
Inventor
Kuniharu Osakabe
Soichi Sakurai
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5944480A priority Critical patent/JPS56156653A/en
Publication of JPS56156653A publication Critical patent/JPS56156653A/en
Publication of JPS6310862B2 publication Critical patent/JPS6310862B2/ja
Granted 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
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only

Abstract

PURPOSE:To compensate for the strength of magnetic field, by arranging a bimetal at a portion of a magnetic path made of a permanent magnet and a soft ferro-magnetic member. CONSTITUTION:A focusing magnetic field producing means 4 is comprised of a permanent magnet 9 formed into a cylinder, needle type focusing magnetic members 10, 11 made of soft ferro-magnetic members facing at both pole end sections of said permanent magnet 9 through a gap (g), a magnetic focusing disc 12 made of soft ferro-magnetic material arranged at N pole of the permanent magnet 9, and a bimetal 13 located between the outer face of N pole side magnetic focusing member 12 of the permanent magnet 9 and the inner wall face of the magnetic focusing needle 11. Here the bimetal 13 has such characteristic that when the temperature rises the size between said members 11 and 12 is increased to increase the gap (g) between said members 10 and 11.
JP5944480A 1980-05-07 1980-05-07 Electro-magnetic focusing type cathode ray tube Granted JPS56156653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5944480A JPS56156653A (en) 1980-05-07 1980-05-07 Electro-magnetic focusing type cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5944480A JPS56156653A (en) 1980-05-07 1980-05-07 Electro-magnetic focusing type cathode ray tube

Publications (2)

Publication Number Publication Date
JPS56156653A true JPS56156653A (en) 1981-12-03
JPS6310862B2 JPS6310862B2 (en) 1988-03-09

Family

ID=13113457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5944480A Granted JPS56156653A (en) 1980-05-07 1980-05-07 Electro-magnetic focusing type cathode ray tube

Country Status (1)

Country Link
JP (1) JPS56156653A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102657616B1 (en) * 2022-06-20 2024-04-12 안영환 Monitoring and Management System for Pen Type Injection Appartus with Double IMU Sensor

Also Published As

Publication number Publication date
JPS6310862B2 (en) 1988-03-09

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