GB721239A - Procedure for the exact adjustment of the distance between the aperture of the grid cylinder and the cathode face of a cathode ray tube - Google Patents

Procedure for the exact adjustment of the distance between the aperture of the grid cylinder and the cathode face of a cathode ray tube

Info

Publication number
GB721239A
GB721239A GB17570/52A GB1757052A GB721239A GB 721239 A GB721239 A GB 721239A GB 17570/52 A GB17570/52 A GB 17570/52A GB 1757052 A GB1757052 A GB 1757052A GB 721239 A GB721239 A GB 721239A
Authority
GB
United Kingdom
Prior art keywords
cathode
aperture
grid cylinder
distance
grid
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
GB17570/52A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB721239A publication Critical patent/GB721239A/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
    • H01J29/485—Construction of the gun or of parts thereof

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

721,239. Cathode-ray' tubes. STANDARD TELEPHONES & CABLES, Ltd. July 11, 1952 [Aug. 23, 1951]. No. 17570/52. Class 39 (1). A method of adjusting the distance between the cathode face and the grid cylinder aperture 3 of a cathode ray tube wherein an insulating body 4 to which the cathode 1 is fastened is inserted into a pot-like grid cylinder the bottom of which contains the aperture, is characterized in that the insulating body 4 is pushed into the grid cylinder until it contacts at least three flanges 5 that have been pressed inward out of the bottom of the grid cylinder, and that the insulating body with the cathode is then pushed along towards the grid aperture until the desired spacing is obtained by impressing at least three dents 6 into the side wall of the grid cylinder below the insulating body. The distance may be checked by focussing a microscope 7 on to the cathode through the grid aperture.
GB17570/52A 1951-08-23 1952-07-11 Procedure for the exact adjustment of the distance between the aperture of the grid cylinder and the cathode face of a cathode ray tube Expired GB721239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE721239X 1951-08-23

Publications (1)

Publication Number Publication Date
GB721239A true GB721239A (en) 1955-01-05

Family

ID=6629362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17570/52A Expired GB721239A (en) 1951-08-23 1952-07-11 Procedure for the exact adjustment of the distance between the aperture of the grid cylinder and the cathode face of a cathode ray tube

Country Status (1)

Country Link
GB (1) GB721239A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967963A (en) * 1957-04-30 1961-01-10 Rca Corp Electron gun structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967963A (en) * 1957-04-30 1961-01-10 Rca Corp Electron gun structure

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