FR2011137A6 - Cathode for electric discharge tubes - Google Patents

Cathode for electric discharge tubes

Info

Publication number
FR2011137A6
FR2011137A6 FR6919953A FR6919953A FR2011137A6 FR 2011137 A6 FR2011137 A6 FR 2011137A6 FR 6919953 A FR6919953 A FR 6919953A FR 6919953 A FR6919953 A FR 6919953A FR 2011137 A6 FR2011137 A6 FR 2011137A6
Authority
FR
France
Prior art keywords
electric discharge
discharge tubes
cathode
metal
support
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
FR6919953A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of FR2011137A6 publication Critical patent/FR2011137A6/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
    • H01J1/26—Supports for the emissive material
    • 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
    • H01J1/14—Solid thermionic cathodes characterised by the material

Landscapes

  • Coating By Spraying Or Casting (AREA)
  • Discharge Lamp (AREA)

Abstract

Or for electric discharge tubes. Support is of high-m.p. metal, particularly W, containing Th oxide and has coating comprising internal layer of tungsten carbide and external layer which is emission base and is high-m.p. metal with thorium migration properties as in Fr. Pat. 1569373 (19.6.68). External layer, particularly Re, is deposited on metallic carbided support which is alloy of W and 5-25% Re.
FR6919953A 1968-06-18 1969-06-16 Cathode for electric discharge tubes Expired FR2011137A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681764509 DE1764509A1 (en) 1968-06-18 1968-06-18 Thorium film cathode for electrical discharge vessels

Publications (1)

Publication Number Publication Date
FR2011137A6 true FR2011137A6 (en) 1970-02-27

Family

ID=5698015

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6919953A Expired FR2011137A6 (en) 1968-06-18 1969-06-16 Cathode for electric discharge tubes

Country Status (3)

Country Link
DE (1) DE1764509A1 (en)
FR (1) FR2011137A6 (en)
NL (1) NL6909169A (en)

Also Published As

Publication number Publication date
NL6909169A (en) 1969-12-22
DE1764509A1 (en) 1971-08-05

Similar Documents

Publication Publication Date Title
GB734311A (en) Improvements in or relating to cathodes for use in electric discharge tubes, tubes comprising such cathodes and methods of manufacturing such cathodes
GB949151A (en) Cold emission point type cathodes
GB568962A (en) Improvements in or relating to cathodes for electron discharge devices
GB1025673A (en) An anode for a high-pressure discharge lamp
GB1168460A (en) High pressure electric discharge device
ES269986A1 (en) Cathode heater for electron discharge devices
GB987483A (en) A cathode for a high-pressure discharge lamp
GB725719A (en) Improvements in and relating to cathodes for electric discharge devices
FR2011137A6 (en) Cathode for electric discharge tubes
GB1525005A (en) Thermionic reaction cathode
GB1005446A (en) An electric heavy-duty low-pressure mercury discharge lamp
ES339027A1 (en) Incandescent lamp with addition of fluorine compounds to the operating gas filling
ES290364A1 (en) Method of coating a filament for a cºtodo (Machine-translation by Google Translate, not legally binding)
GB1169029A (en) Anode Plate for X-Ray Tubes
GB1170880A (en) Improvements in or relating to thorium-film thermionic cathodes for electrical discharge vessels.
US1667471A (en) Glow cathode and electron tube containing same
GB1257198A (en)
US1896614A (en) Gas content rectifier
GB1045396A (en) Thermionic cathodes
GB1201172A (en) Microwave tubes and methods of fixing lossy coatings therein
GB1080600A (en) Improvements relating to spark gap devices
SU137588A1 (en) Method for reducing reverse currents of a grid of electronic tubes
GB1234905A (en) Improvements in or relating to thorium film cathodes
GB1226627A (en)
GB543816A (en) Improvements in electric discharge devices