FR838980A - Improvements to controlled electron sources, with a substantially point emissive surface - Google Patents

Improvements to controlled electron sources, with a substantially point emissive surface

Info

Publication number
FR838980A
FR838980A FR838980DA FR838980A FR 838980 A FR838980 A FR 838980A FR 838980D A FR838980D A FR 838980DA FR 838980 A FR838980 A FR 838980A
Authority
FR
France
Prior art keywords
electron sources
substantially point
emissive surface
controlled electron
point emissive
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.)
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
Application granted granted Critical
Publication of FR838980A publication Critical patent/FR838980A/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
    • H01J29/48—Electron guns
    • 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
    • H01J29/48—Electron guns
    • H01J29/481—Electron guns using field-emission, photo-emission, or secondary-emission electron source
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
FR838980D 1937-06-10 1938-06-08 Improvements to controlled electron sources, with a substantially point emissive surface Expired FR838980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2197033X 1937-06-10

Publications (1)

Publication Number Publication Date
FR838980A true FR838980A (en) 1939-03-21

Family

ID=7989600

Family Applications (1)

Application Number Title Priority Date Filing Date
FR838980D Expired FR838980A (en) 1937-06-10 1938-06-08 Improvements to controlled electron sources, with a substantially point emissive surface

Country Status (2)

Country Link
US (1) US2197033A (en)
FR (1) FR838980A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE442708A (en) * 1939-08-21
US2452044A (en) * 1943-08-14 1948-10-26 Fox Benjamin High emission cathode
US2418029A (en) * 1943-10-08 1947-03-25 Rca Corp Electron probe analysis employing X-ray spectrography
US2450602A (en) * 1944-08-17 1948-10-05 Hartford Nat Bank & Trust Co Thermionic discharge tube with electronic velocity filter
GB624832A (en) * 1947-07-10 1949-06-16 Cinema Television Ltd Improvements in or relating to circuits for cathode ray tubes and methods of operating the same
US2581243A (en) * 1949-05-28 1952-01-01 Rca Corp Cathode of electron beam devices

Also Published As

Publication number Publication date
US2197033A (en) 1940-04-16

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