GB1173865A - Electron Gun Unit - Google Patents

Electron Gun Unit

Info

Publication number
GB1173865A
GB1173865A GB2158868A GB2158868A GB1173865A GB 1173865 A GB1173865 A GB 1173865A GB 2158868 A GB2158868 A GB 2158868A GB 2158868 A GB2158868 A GB 2158868A GB 1173865 A GB1173865 A GB 1173865A
Authority
GB
United Kingdom
Prior art keywords
cathode
protuberance
gun
interrupted
assembly
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
GB2158868A
Inventor
Asahide Tsuneta
Shinichi Sawagata
Masakatsu Nakahara
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB1173865A publication Critical patent/GB1173865A/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
    • H01J29/48—Electron guns
    • 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
    • H01J29/485—Construction of the gun or of parts thereof

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

1,173,865. Cathode-ray tubes. TOKYO SHIBAURA ELECTRIC CO. Ltd. 7 May, 1968 [9 May, 1967], No. 21588/68. Heading H1D An electron gun comprising a cylindrical cathode 12 and an adjacent control electrode having an aperture 22 for the passage of the beam and a generally annular protuberance 23 surrounding the emissive surface of the cathode, is characterized in that the protuberance 23 is interrupted at one or more points to allow optical observation of the cathode-control electrode spacing during assembly of the gun. The gun shown is one of a triple gun assembly for a colour tube and includes support members 17 adapted to engage glass support rods (not shown). A gap 27 between members 17 allows a beam of light to pass through the cathode-grid assembly between the gaps in the protuberance 23 to an optical projection system which produces a greatly enlarged image on a display screen (Figs. 4 and 5, not shown) thereby allowing accurate measurement of the spacing. In a modification, Fig. 7 (not shown), the protuberance 23 is interrupted at only one point.
GB2158868A 1967-05-09 1968-05-07 Electron Gun Unit Expired GB1173865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3798567 1967-05-09

Publications (1)

Publication Number Publication Date
GB1173865A true GB1173865A (en) 1969-12-10

Family

ID=12512847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2158868A Expired GB1173865A (en) 1967-05-09 1968-05-07 Electron Gun Unit

Country Status (2)

Country Link
DE (1) DE1764272B1 (en)
GB (1) GB1173865A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294993A (en) * 1962-07-06

Also Published As

Publication number Publication date
DE1764272B1 (en) 1971-09-23

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees