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GB498491A - Improvements in cathode ray tubes - Google Patents

Improvements in cathode ray tubes

Info

Publication number
GB498491A
GB498491A GB2150338A GB2150338A GB498491A GB 498491 A GB498491 A GB 498491A GB 2150338 A GB2150338 A GB 2150338A GB 2150338 A GB2150338 A GB 2150338A GB 498491 A GB498491 A GB 498491A
Authority
GB
United Kingdom
Prior art keywords
ray
screen
cathode
cossor
ray tubes
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
GB2150338A
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.)
A C COSSOR HOLDINGS Ltd
Original Assignee
A C COSSOR HOLDINGS 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 A C COSSOR HOLDINGS Ltd filed Critical A C COSSOR HOLDINGS Ltd
Priority to GB2150338A priority Critical patent/GB498491A/en
Publication of GB498491A publication Critical patent/GB498491A/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
    • H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

498,491. Cathode-ray tubes. COSSOR (HOLDINGS), Ltd., A. C., (formerly COSSOR, Ltd., A. C.), SHELTON, E. E., and WILLIAMS, B. C. FLEMING-. July 9, 1937, No. 21503 /38. Divided out of 498,484. [Class 39 (i)] To prevent negative ions formed in the region of the cathode from impinging on the fluorescent screen in a hard vacuum cathoderay tube, a bias potential is applied between a pair of electrostatic deflector plates sufficient to deflect the ray off the screen and a magnetic field is also applied to nullify the effect of this deflection on the electrons in the ray and thereby direct them on the screen. The magnetic field may precede or follow the electrostatic field in relation to the beam or they may be coincident. The magnetic feld may be obtained by a permanent or electromagnet. The electrostatic field may be applied to those electrodes used for normal deflection or to separate plates.
GB2150338A 1937-07-09 1937-07-09 Improvements in cathode ray tubes Expired GB498491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2150338A GB498491A (en) 1937-07-09 1937-07-09 Improvements in cathode ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2150338A GB498491A (en) 1937-07-09 1937-07-09 Improvements in cathode ray tubes

Publications (1)

Publication Number Publication Date
GB498491A true GB498491A (en) 1939-01-09

Family

ID=10164027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2150338A Expired GB498491A (en) 1937-07-09 1937-07-09 Improvements in cathode ray tubes

Country Status (1)

Country Link
GB (1) GB498491A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456474A (en) * 1946-07-02 1948-12-14 Gen Electric Electric discharge device
US2460609A (en) * 1946-01-24 1949-02-01 Rca Corp Beam aligning apparatus
US2496127A (en) * 1947-02-05 1950-01-31 Rca Corp Electron gun for cathode-ray tubes
US2515305A (en) * 1946-01-24 1950-07-18 Rca Corp Electromagnet
US2531050A (en) * 1946-11-30 1950-11-21 Sylvania Electric Prod Ion trap
US2555850A (en) * 1948-01-28 1951-06-05 Nicholas D Glyptis Ion trap
DE969907C (en) * 1944-07-15 1958-07-31 Fernseh Gmbh Arrangement for preventing positive ions from striking the cathode of cathode ray tubes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969907C (en) * 1944-07-15 1958-07-31 Fernseh Gmbh Arrangement for preventing positive ions from striking the cathode of cathode ray tubes
US2460609A (en) * 1946-01-24 1949-02-01 Rca Corp Beam aligning apparatus
US2515305A (en) * 1946-01-24 1950-07-18 Rca Corp Electromagnet
US2456474A (en) * 1946-07-02 1948-12-14 Gen Electric Electric discharge device
US2531050A (en) * 1946-11-30 1950-11-21 Sylvania Electric Prod Ion trap
US2496127A (en) * 1947-02-05 1950-01-31 Rca Corp Electron gun for cathode-ray tubes
US2555850A (en) * 1948-01-28 1951-06-05 Nicholas D Glyptis Ion trap

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