GB467611A - Improvements in or relating to cathode ray tubes and apparatus comprising them - Google Patents

Improvements in or relating to cathode ray tubes and apparatus comprising them

Info

Publication number
GB467611A
GB467611A GB3557735A GB3557735A GB467611A GB 467611 A GB467611 A GB 467611A GB 3557735 A GB3557735 A GB 3557735A GB 3557735 A GB3557735 A GB 3557735A GB 467611 A GB467611 A GB 467611A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
potentials
ray tubes
focusing
electrodes
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
GB3557735A
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB3557735A priority Critical patent/GB467611A/en
Publication of GB467611A publication Critical patent/GB467611A/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
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun

Landscapes

  • Electron Sources, Ion Sources (AREA)

Abstract

467,611. Supply systems for cathoderay tubes. GENERAL ELECTRIC CO., Ltd., and JESTY, L. C. Dec. 23, 1935, No. 35577. [Class 38 (iv)] [Also in Group XL] In cathode-ray tubes of television receivers or other apparatus containing a diaphragm 6 cutting off the peripheral portion of the electron beam so that no part thereof strikes the electrodes 4, 5 of an electrostatic lens, the electrode 4 and diaphragm 6 are spaced apart and fed from an independent potentiometer of high impedance, such as 4 megohms, not absorbing a large fraction of the power required to operate the tube. Variations in the voltage of the diaphragm 6 due to the varying current to it and to the impedance of its supply potentiometer do not affect the field between it and the electrode 4 sufficiently to produce any deterioration of the focusing of the beam, and as the potentials of the electrodes 4, 5 do not vary, the focusing thus remains constant. The two potentiometers are fed from a single lowimpedance source. Potentials and dimensions are specified.
GB3557735A 1935-12-23 1935-12-23 Improvements in or relating to cathode ray tubes and apparatus comprising them Expired GB467611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3557735A GB467611A (en) 1935-12-23 1935-12-23 Improvements in or relating to cathode ray tubes and apparatus comprising them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3557735A GB467611A (en) 1935-12-23 1935-12-23 Improvements in or relating to cathode ray tubes and apparatus comprising them

Publications (1)

Publication Number Publication Date
GB467611A true GB467611A (en) 1937-06-21

Family

ID=10379275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3557735A Expired GB467611A (en) 1935-12-23 1935-12-23 Improvements in or relating to cathode ray tubes and apparatus comprising them

Country Status (1)

Country Link
GB (1) GB467611A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214816A2 (en) * 1985-08-29 1987-03-18 Sony Corporation Cathode ray tubes
EP0247688A2 (en) * 1986-05-30 1987-12-02 Koninklijke Philips Electronics N.V. Cathode ray tube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214816A2 (en) * 1985-08-29 1987-03-18 Sony Corporation Cathode ray tubes
EP0214816A3 (en) * 1985-08-29 1988-11-23 Sony Corporation Cathode ray tubes
EP0247688A2 (en) * 1986-05-30 1987-12-02 Koninklijke Philips Electronics N.V. Cathode ray tube
EP0247688A3 (en) * 1986-05-30 1988-11-30 Koninklijke Philips Electronics N.V. Cathode ray tube

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