GB482704A - Improvements in or relating to cathode-ray tubes - Google Patents

Improvements in or relating to cathode-ray tubes

Info

Publication number
GB482704A
GB482704A GB28632/37A GB2863237A GB482704A GB 482704 A GB482704 A GB 482704A GB 28632/37 A GB28632/37 A GB 28632/37A GB 2863237 A GB2863237 A GB 2863237A GB 482704 A GB482704 A GB 482704A
Authority
GB
United Kingdom
Prior art keywords
cathode
ray tubes
elements
screen
perforations
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
GB28632/37A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB482704A publication Critical patent/GB482704A/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
    • H01J29/16—Incandescent screens

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

482,704. Cathode-ray tubes. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Oct. 20, 1937, No. 28632. Convention date, Oct. 23, 1936. Drawings to Specification. [Class 39 (i)] In cathode-ray tubes for image reproduction having an incandescent screen, broadening of the lines is avoided by dividing up the screen of highly refractory sheet metal into elements by perforations so as to reduce thermal conduction. The elements may be rectangular or other shape and the perforations may be circular, elongated or cruciform shaped. The width of the elements is not greater than that of the scanning lines, and the screen has a thickness not exceeding 6 microns.
GB28632/37A 1936-10-23 1937-10-20 Improvements in or relating to cathode-ray tubes Expired GB482704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE482704X 1936-10-23

Publications (1)

Publication Number Publication Date
GB482704A true GB482704A (en) 1938-04-04

Family

ID=6542870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28632/37A Expired GB482704A (en) 1936-10-23 1937-10-20 Improvements in or relating to cathode-ray tubes

Country Status (5)

Country Link
US (1) US2211843A (en)
BE (1) BE424211A (en)
FR (1) FR828098A (en)
GB (1) GB482704A (en)
NL (1) NL49665C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532175A (en) * 1944-03-31 1950-11-28 Rca Corp Visible image radio responsive device

Also Published As

Publication number Publication date
US2211843A (en) 1940-08-20
BE424211A (en)
NL49665C (en)
FR828098A (en) 1938-05-10

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