GB451590A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB451590A
GB451590A GB3612/35A GB361235A GB451590A GB 451590 A GB451590 A GB 451590A GB 3612/35 A GB3612/35 A GB 3612/35A GB 361235 A GB361235 A GB 361235A GB 451590 A GB451590 A GB 451590A
Authority
GB
United Kingdom
Prior art keywords
metal
layer
cathode
ray tubes
feb
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
GB3612/35A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB451590A publication Critical patent/GB451590A/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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers
    • 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
    • H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

451,590. Cathode-ray tubes. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Feb. 4, 1935, No. 3612. Convention date, Feb. 2, 1934. Drawings to Specification. [Class 39 (i)] [See also Group XX] In tubes for television &c. and having fluorescent screens coated on the side facing the cathode with a thin metal layer removing charges from the screen, the metal layer is of barium, potassium, caesium, magnesium or other metal of similar secondary emitting properties and low density to help in the removal of space charges near the screen by its secondary emission and to make the layer transparent to electrons. The layer is formed by vaporizing the metal from a side branch of the tube after evacuation and sealing off and acts as a " getter."
GB3612/35A 1934-02-02 1935-02-04 Improvements in or relating to cathode ray tubes Expired GB451590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE451590X 1934-02-02

Publications (1)

Publication Number Publication Date
GB451590A true GB451590A (en) 1936-08-04

Family

ID=6538540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3612/35A Expired GB451590A (en) 1934-02-02 1935-02-04 Improvements in or relating to cathode ray tubes

Country Status (1)

Country Link
GB (1) GB451590A (en)

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