FR33669E - Improvements to methods and apparatus for radiovision - Google Patents

Improvements to methods and apparatus for radiovision

Info

Publication number
FR33669E
FR33669E FR33669DA FR33669E FR 33669 E FR33669 E FR 33669E FR 33669D A FR33669D A FR 33669DA FR 33669 E FR33669 E FR 33669E
Authority
FR
France
Prior art keywords
radiovision
methods
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
Other languages
French (fr)
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.)
Societe des Etablissements Edouard Belin SA
Original Assignee
Societe des Etablissements Edouard Belin SA
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 Societe des Etablissements Edouard Belin SA filed Critical Societe des Etablissements Edouard Belin SA
Application granted granted Critical
Publication of FR33669E publication Critical patent/FR33669E/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
FR33669D 1927-03-04 1927-03-04 Improvements to methods and apparatus for radiovision Expired FR33669E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR33669T 1927-03-04

Publications (1)

Publication Number Publication Date
FR33669E true FR33669E (en) 1928-11-29

Family

ID=8671296

Family Applications (1)

Application Number Title Priority Date Filing Date
FR33669D Expired FR33669E (en) 1927-03-04 1927-03-04 Improvements to methods and apparatus for radiovision

Country Status (1)

Country Link
FR (1) FR33669E (en)

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