GB415398A - Improvements relating to indirectly heated cathodes for electron discharge devices - Google Patents

Improvements relating to indirectly heated cathodes for electron discharge devices

Info

Publication number
GB415398A
GB415398A GB4800/33A GB480033A GB415398A GB 415398 A GB415398 A GB 415398A GB 4800/33 A GB4800/33 A GB 4800/33A GB 480033 A GB480033 A GB 480033A GB 415398 A GB415398 A GB 415398A
Authority
GB
United Kingdom
Prior art keywords
insulator
indirectly heated
channels
feb
improvements relating
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
GB4800/33A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB415398A publication Critical patent/GB415398A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Landscapes

  • Electron Beam Exposure (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

415,398. Thermionic cathodes. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin.) Feb. 16, 1933, No. 4800. Convention date, Feb. 16, 1932. [Class 39 (i).] An indirectly heated cathode has a metal shell coated externally with an electron emitting substance and containing .a rod shaped insulator 2 having four or more longitudinal channels 5 parallel to the axis of the insulator for the reception of a heating wire 6, the axes of the channels lying on a surface parallel with the outer surface of the insulator, and no central channels being provided. The insulator may be of circular, elliptical or rectangular crosssection. Reference has been directed by the Comptroller to Specification 371,419.
GB4800/33A 1932-02-16 1933-02-16 Improvements relating to indirectly heated cathodes for electron discharge devices Expired GB415398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE415398X 1932-02-16

Publications (1)

Publication Number Publication Date
GB415398A true GB415398A (en) 1934-08-16

Family

ID=6448466

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4800/33A Expired GB415398A (en) 1932-02-16 1933-02-16 Improvements relating to indirectly heated cathodes for electron discharge devices
GB4801/33A Expired GB400058A (en) 1932-02-16 1933-02-16 Improvements relating to indirectly heated cathodes for electron discharge devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4801/33A Expired GB400058A (en) 1932-02-16 1933-02-16 Improvements relating to indirectly heated cathodes for electron discharge devices

Country Status (3)

Country Link
FR (1) FR750565A (en)
GB (2) GB415398A (en)
NL (1) NL36127C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE411406A (en) * 1935-03-06
NL48805C (en) * 1936-09-01

Also Published As

Publication number Publication date
FR750565A (en) 1933-08-12
GB400058A (en) 1933-10-19
NL36127C (en)

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