GB518580A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB518580A
GB518580A GB2507538A GB2507538A GB518580A GB 518580 A GB518580 A GB 518580A GB 2507538 A GB2507538 A GB 2507538A GB 2507538 A GB2507538 A GB 2507538A GB 518580 A GB518580 A GB 518580A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
ray tubes
relating
cathode ray
cathode
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
GB2507538A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2507538A priority Critical patent/GB518580A/en
Publication of GB518580A publication Critical patent/GB518580A/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

Abstract

518,580. Cathode-ray tubes. NICOLL, F. H. Aug. 26, 1938, No. 25075. [Class 39 (i)] In a cathode-ray tube such as described in Specification 431,327, wherein the beam is defined-prior to final focusing on to the screen -by an apertured diaphragm 8 arranged near the focusing lens, such secondary electrons as are generated by the impact of the beam on the diaphragm are prevented from passing to the screen by an electrode 6a at a potential slightly negative to that of the anode 6 in front of the diaphragm. The diaphragm and negative electrode 6a are shown integral, but they may be separate or the diaphragm may carry the negative bias. Potentials are given.
GB2507538A 1938-08-26 1938-08-26 Improvements in or relating to cathode ray tubes Expired GB518580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2507538A GB518580A (en) 1938-08-26 1938-08-26 Improvements in or relating to cathode ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2507538A GB518580A (en) 1938-08-26 1938-08-26 Improvements in or relating to cathode ray tubes

Publications (1)

Publication Number Publication Date
GB518580A true GB518580A (en) 1940-03-01

Family

ID=10221797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2507538A Expired GB518580A (en) 1938-08-26 1938-08-26 Improvements in or relating to cathode ray tubes

Country Status (1)

Country Link
GB (1) GB518580A (en)

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