ES178440A1 - IMPROVEMENTS IN THE CONSTRUCTION OF THERMOIONIC CATHODES FOR ELECTRONIC TUBES - Google Patents

IMPROVEMENTS IN THE CONSTRUCTION OF THERMOIONIC CATHODES FOR ELECTRONIC TUBES

Info

Publication number
ES178440A1
ES178440A1 ES0178440A ES178440A ES178440A1 ES 178440 A1 ES178440 A1 ES 178440A1 ES 0178440 A ES0178440 A ES 0178440A ES 178440 A ES178440 A ES 178440A ES 178440 A1 ES178440 A1 ES 178440A1
Authority
ES
Spain
Prior art keywords
cathode
construction
electronic
electronic tubes
cathodes
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
ES0178440A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana 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
Priority claimed from GB12024/44A external-priority patent/GB590411A/en
Application filed by Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES178440A1 publication Critical patent/ES178440A1/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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • 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

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

Mejoras en la construcción de cátodos termoiónicos para tubos electrónicos caracterizadas por un tubo electrónico que contenga varios electrodos incluyendo un cátodo termoiónico con una capa emisora de electrones que recubra substancialmente toda su. superficie externa dicha superficie habiendo sido tallada o modelada de tal forma que cuando sean aplicados los potenciales normales de funcionamiento a los diversos electrodos (excepto si el potencial calefactor del cátodo no está aplicado) se produce un campo eléctrico en el tubo electrónico de una intensidad relativamente alta adyacente a las superficies del cátodo en las cuales se desea una fuerte emisión electrónica cuando el cátodo está caliente y una intensidad relativamente baja en las proximidades de las restantes superficies.Improvements in the construction of thermionic cathodes for electronic tubes characterized by an electronic tube containing several electrodes including a thermionic cathode with an electron emitting layer that covers substantially all of its. external surface said surface having been carved or shaped in such a way that when the normal operating potentials are applied to the various electrodes (except if the heating potential of the cathode is not applied) an electric field is produced in the electronic tube of a relatively high intensity. high adjacent to the cathode surfaces in which strong electron emission is desired when the cathode is hot and relatively low intensity in the vicinity of the remaining surfaces.

ES0178440A 1944-06-23 1947-06-14 IMPROVEMENTS IN THE CONSTRUCTION OF THERMOIONIC CATHODES FOR ELECTRONIC TUBES Expired ES178440A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12024/44A GB590411A (en) 1944-06-23 Improvements in or relating to thermionic cathodes

Publications (1)

Publication Number Publication Date
ES178440A1 true ES178440A1 (en) 1947-08-01

Family

ID=9997021

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0178440A Expired ES178440A1 (en) 1944-06-23 1947-06-14 IMPROVEMENTS IN THE CONSTRUCTION OF THERMOIONIC CATHODES FOR ELECTRONIC TUBES

Country Status (3)

Country Link
BE (1) BE480139A (en)
ES (1) ES178440A1 (en)
FR (1) FR950342A (en)

Also Published As

Publication number Publication date
FR950342A (en) 1949-09-23
BE480139A (en)

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