GB915812A - Improvements in electron-guns - Google Patents

Improvements in electron-guns

Info

Publication number
GB915812A
GB915812A GB32396/59A GB3239659A GB915812A GB 915812 A GB915812 A GB 915812A GB 32396/59 A GB32396/59 A GB 32396/59A GB 3239659 A GB3239659 A GB 3239659A GB 915812 A GB915812 A GB 915812A
Authority
GB
United Kingdom
Prior art keywords
ferromagnetic
ferromagnetic member
metal
deposit
electron
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
GB32396/59A
Inventor
Bernard Thomas Murphy
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.)
Philips Components Ltd
Original Assignee
Mullard 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
Priority to NL255680D priority Critical patent/NL255680A/xx
Application filed by Mullard Ltd filed Critical Mullard Ltd
Priority to GB32396/59A priority patent/GB915812A/en
Priority to US56924A priority patent/US3141988A/en
Priority to DE19606606171U priority patent/DE6606171U/en
Priority to DEN18938A priority patent/DE1231358B/en
Priority to FR839162A priority patent/FR1268129A/en
Publication of GB915812A publication Critical patent/GB915812A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/06—Electron or ion guns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/027—Construction of the gun or parts thereof

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Microwave Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

915,812. Electron beam apparatus. MULLARD Ltd. Sept. 23, 1959, No. 32396/59. Class 39 (1). An electron gun comprises a ferromagnetic focusing member 3 and a beam forming electrode 9 formed as a metal coating deposited on the ferromagnetic member. The ferromagnetic member may be an alloy or a ferrite and the metal deposit may be formed by plating or spraying. The deposit may follow the profile of the ferromagnetic member or may be built up to a different profile and machined. The magnetic circuit includes an annulus 31 sealed to the envelope 1. In another embodiment the central portion of the ferromagnetic member is dish shaped and the beam forming electrode 10 is also composed as a metal deposit on a ferromagnetic member. Strips of metal may be provided on the ferromagnetic members to provide electrical connections.
GB32396/59A 1959-09-23 1959-09-23 Improvements in electron-guns Expired GB915812A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL255680D NL255680A (en) 1959-09-23
GB32396/59A GB915812A (en) 1959-09-23 1959-09-23 Improvements in electron-guns
US56924A US3141988A (en) 1959-09-23 1960-09-19 Electron-gun using combined magnetic and electrostatic focussing
DE19606606171U DE6606171U (en) 1959-09-23 1960-09-20 ELECTRONIC SYRINGE
DEN18938A DE1231358B (en) 1959-09-23 1960-09-20 Electron beam generation system for cathode ray tubes
FR839162A FR1268129A (en) 1959-09-23 1960-09-21 Electron gun for electron beam tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32396/59A GB915812A (en) 1959-09-23 1959-09-23 Improvements in electron-guns

Publications (1)

Publication Number Publication Date
GB915812A true GB915812A (en) 1963-01-16

Family

ID=10337973

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32396/59A Expired GB915812A (en) 1959-09-23 1959-09-23 Improvements in electron-guns

Country Status (4)

Country Link
US (1) US3141988A (en)
DE (2) DE6606171U (en)
GB (1) GB915812A (en)
NL (1) NL255680A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL278366A (en) * 1961-05-27
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB665094A (en) * 1947-04-12 1952-01-16 Ass Elect Ind Improvements relating to the reduction of primary spherical aberration in magnetic electron lenses
DE1032420B (en) * 1949-11-30 1958-06-19 Loewe Opta Ag Cathode ray tube
US3098942A (en) * 1955-02-24 1963-07-23 Zenith Radio Corp Magnetic centering device for cathode ray tubes

Also Published As

Publication number Publication date
DE1231358B (en) 1966-12-29
US3141988A (en) 1964-07-21
DE6606171U (en) 1970-10-01
NL255680A (en)

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