GB519668A - Improvements relating to cathode ray tubes - Google Patents

Improvements relating to cathode ray tubes

Info

Publication number
GB519668A
GB519668A GB13915/38A GB1391538A GB519668A GB 519668 A GB519668 A GB 519668A GB 13915/38 A GB13915/38 A GB 13915/38A GB 1391538 A GB1391538 A GB 1391538A GB 519668 A GB519668 A GB 519668A
Authority
GB
United Kingdom
Prior art keywords
pole piece
magnet
tube
ray tubes
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
GB13915/38A
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.)
WALTER HENRY STEVENS
AC Cossor Ltd
Original Assignee
WALTER HENRY STEVENS
AC Cossor 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 WALTER HENRY STEVENS, AC Cossor Ltd filed Critical WALTER HENRY STEVENS
Priority claimed from US272508A external-priority patent/US2336837A/en
Publication of GB519668A publication Critical patent/GB519668A/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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • H01J29/766—Deflecting by magnetic fields only using a combination of saddle coils and toroidal windings
    • 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
    • H01J29/54—Arrangements for centring ray or beam
    • 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
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Details Of Television Scanning (AREA)

Abstract

519,668. Cathode-ray tubes. COSSOR, Ltd., A. C., BEDFORD, L. H., JOFEH, L., and STEVENS, W. H. May 10, 1938, No. 13915. [Class 39 (i)] Focussing in a cathode-ray tube used as a beam valve or one having a fluorescent screen or acting as an iconoscope is effected by a permanent magnet 2 having pole pieces 3, 4 whose internal diameter is smaller than that of the magnet; the pole piece 3 has its internal edge spun over into a cone to receive a rubber wedge inserted between it and the neck 1 of the tube to support the latter. The pole piece 3 is large enough to prevent penetration of the magnetic field along the tube. The pole piece 4 is adjustable on the face of the magnet as described in Specification 519,715. A mild steel ring 5 is adjustable along the neck to adjust focus. Specifications 459,860, 472,165, and 487,998 also are referred to.
GB13915/38A 1938-05-10 1938-05-10 Improvements relating to cathode ray tubes Expired GB519668A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB212037X 1938-05-10
US272508A US2336837A (en) 1938-05-10 1939-05-08 Electrical apparatus
US459018A US2387110A (en) 1938-05-10 1942-09-19 Electrical apparatus

Publications (1)

Publication Number Publication Date
GB519668A true GB519668A (en) 1940-04-03

Family

ID=32110572

Family Applications (2)

Application Number Title Priority Date Filing Date
GB13915/38A Expired GB519668A (en) 1938-05-10 1938-05-10 Improvements relating to cathode ray tubes
GB14005/39A Expired GB519715A (en) 1938-05-10 1938-05-10 Improvements relating to cathode ray tubes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB14005/39A Expired GB519715A (en) 1938-05-10 1938-05-10 Improvements relating to cathode ray tubes

Country Status (5)

Country Link
US (1) US2387110A (en)
CH (1) CH212037A (en)
FR (1) FR854515A (en)
GB (2) GB519668A (en)
NL (1) NL60535C (en)

Also Published As

Publication number Publication date
US2387110A (en) 1945-10-16
NL60535C (en)
FR854515A (en) 1940-04-17
GB519715A (en) 1940-04-03
CH212037A (en) 1940-10-31

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