GB526954A - Improvements in or relating to electron discharge devices for use in the transmission of images - Google Patents

Improvements in or relating to electron discharge devices for use in the transmission of images

Info

Publication number
GB526954A
GB526954A GB906739A GB906739A GB526954A GB 526954 A GB526954 A GB 526954A GB 906739 A GB906739 A GB 906739A GB 906739 A GB906739 A GB 906739A GB 526954 A GB526954 A GB 526954A
Authority
GB
United Kingdom
Prior art keywords
cathode
screen
scanned
scanning beam
coil
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
GB906739A
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.)
MICHAEL BOWMAN MANIFOLD
Original Assignee
MICHAEL BOWMAN MANIFOLD
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 MICHAEL BOWMAN MANIFOLD filed Critical MICHAEL BOWMAN MANIFOLD
Priority to GB906739A priority Critical patent/GB526954A/en
Publication of GB526954A publication Critical patent/GB526954A/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
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching

Landscapes

  • Transforming Electric Information Into Light Information (AREA)

Abstract

526,954. Cathode-ray tubes. MANIFOLD, M. BOWMAN-, and MILLER, H. March 22, 1939, No. 9067. [Class 39 (i)] In a television or like transmitting device in which an electron image is focused on to a mosaic screen which is scanned by a cathode beam the deflection of the scanning beam is so controlled by a steady field as to compensate for distortion produced by the focusing means. Fig. 1 shows such a device in which an image produced on a photo-electric screen 5 is focused by a coil 7 on to a mosaic screen 2 which is scanned by a ray from the cathode 3. A coil 10 surrounding the arm 4 of the tube containing the cathode 10 controls the beam to produce the desired compensation. To compensate distortion produced by the inclination of the scanning beam to the screen the coil 10 may be made unsymmetrical. The invention is also described in connection with apparatus, such as that described in Specification 442,666, in which the projected image and the cathode ray are on opposite sides of the mosaic. In such a device the scanning beam may be produced by a photoelectric or secondarily emission screen, which is scanned by a light beam or cathode ray, so that the scanning beam is always parallel to the axis of the device. Specifications 457,493 and 495,338 also are referred to.
GB906739A 1939-03-22 1939-03-22 Improvements in or relating to electron discharge devices for use in the transmission of images Expired GB526954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB906739A GB526954A (en) 1939-03-22 1939-03-22 Improvements in or relating to electron discharge devices for use in the transmission of images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB906739A GB526954A (en) 1939-03-22 1939-03-22 Improvements in or relating to electron discharge devices for use in the transmission of images

Publications (1)

Publication Number Publication Date
GB526954A true GB526954A (en) 1940-09-30

Family

ID=9864749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB906739A Expired GB526954A (en) 1939-03-22 1939-03-22 Improvements in or relating to electron discharge devices for use in the transmission of images

Country Status (1)

Country Link
GB (1) GB526954A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517807A (en) * 1945-05-30 1950-08-08 Rca Corp Neutralization of deflection field between photocathode and mosaic of pickup tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517807A (en) * 1945-05-30 1950-08-08 Rca Corp Neutralization of deflection field between photocathode and mosaic of pickup tube

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