GB517756A - Improvements in or relating to cathode ray devices - Google Patents

Improvements in or relating to cathode ray devices

Info

Publication number
GB517756A
GB517756A GB4616/39A GB461639A GB517756A GB 517756 A GB517756 A GB 517756A GB 4616/39 A GB4616/39 A GB 4616/39A GB 461639 A GB461639 A GB 461639A GB 517756 A GB517756 A GB 517756A
Authority
GB
United Kingdom
Prior art keywords
electrode
anode
screen
cathode
resistances
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
GB4616/39A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB517756A publication Critical patent/GB517756A/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

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

517,756. Cathode-ray tubes. ELECTRICAL RESEARCH PRODUCTS, Inc. Feb. 13, 1939, No. 4616. Convention date, Feb. 19, 1937. [Class 39 (i)] In a tube of the iconoscope type a cylindrical electrode, at a lower positive potential than the focusing anode, is placed between the anode and the screen to prevent secondary electrons derived from the anode from reaching the screen. In the arrangement shown the focusing anode 19 consists of a cylinder 27 of greater diameter than the controlling electrode 21 and a cylinder 28 of the same diameter as the controlling electrode the two being connected by a transverse plane portion 26. The cylindrical electrode 20 is of larger diameter than either and is connected to a conducting lining 11 in the neck of the tube and the envelope. The anode 19 is maintained at a potential about 3,000 volts above that of the cathode and the electrode 20 at 800 or 900 volts below the electrode 19. The plates 13 and 14 of one pair of deflecting plates and those 15, 16 of the other are connected through resistances 36, 37 respectively and the mid points of these resistances are connected to the electrode 20. The screen may be made as described in Specification 474,591. Specification 493,882 also is referred to.
GB4616/39A 1938-02-19 1939-02-13 Improvements in or relating to cathode ray devices Expired GB517756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US517756XA 1938-02-19 1938-02-19

Publications (1)

Publication Number Publication Date
GB517756A true GB517756A (en) 1940-02-07

Family

ID=21973303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4616/39A Expired GB517756A (en) 1938-02-19 1939-02-13 Improvements in or relating to cathode ray devices

Country Status (1)

Country Link
GB (1) GB517756A (en)

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