GB404169A - Thermionic cathode for electric discharge devices - Google Patents

Thermionic cathode for electric discharge devices

Info

Publication number
GB404169A
GB404169A GB839033A GB839033A GB404169A GB 404169 A GB404169 A GB 404169A GB 839033 A GB839033 A GB 839033A GB 839033 A GB839033 A GB 839033A GB 404169 A GB404169 A GB 404169A
Authority
GB
United Kingdom
Prior art keywords
carrier
electric discharge
discharge devices
march
thermionic cathode
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
GB839033A
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 GB404169A publication Critical patent/GB404169A/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
    • H01J1/15—Cathodes heated directly by an electric current

Landscapes

  • Physical Or Chemical Processes And Apparatus (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

404,169. Thermionic cathodes. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitats-Ges. ; 2, Friedrich Karl-Ufer, Berlin.) March 20, 1933, No. 8390. Convention date, March 19, 1932. [Class 39 (i).] The carrier portion of a Wehnelt cathode is grooved or channelled by incising it. In one form a carrier 1 coated with barium oxide is scored by a fine needle either before or after the coating is applied. The carrier is mounted on supports 4, 5 by current-carrying wires 2, 2<1>, 3, 3<1>. The scorings may be straight, circular or in grid formation with a spacing of 0.1 to 0.2 mm.
GB839033A 1932-03-20 1933-03-20 Thermionic cathode for electric discharge devices Expired GB404169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA65440D DE626819C (en) 1932-03-20 1932-03-20 Incandescent cathode in which an emitting oxide layer is applied to a metal base

Publications (1)

Publication Number Publication Date
GB404169A true GB404169A (en) 1934-01-11

Family

ID=31724009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB839033A Expired GB404169A (en) 1932-03-20 1933-03-20 Thermionic cathode for electric discharge devices

Country Status (3)

Country Link
DE (1) DE626819C (en)
GB (1) GB404169A (en)
NL (1) NL35461C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231198A (en) * 1989-03-31 1990-11-07 Litton Systems Inc Enhanced secondary electron emitter.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231198A (en) * 1989-03-31 1990-11-07 Litton Systems Inc Enhanced secondary electron emitter.
US4975656A (en) * 1989-03-31 1990-12-04 Litton Systems, Inc. Enhanced secondary electron emitter
GB2231198B (en) * 1989-03-31 1994-04-27 Litton Systems Inc Secondary electron emission cathode

Also Published As

Publication number Publication date
NL35461C (en)
DE626819C (en) 1936-03-03

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