JPS55133726A - Manufacture of heater for electron tube - Google Patents

Manufacture of heater for electron tube

Info

Publication number
JPS55133726A
JPS55133726A JP4128479A JP4128479A JPS55133726A JP S55133726 A JPS55133726 A JP S55133726A JP 4128479 A JP4128479 A JP 4128479A JP 4128479 A JP4128479 A JP 4128479A JP S55133726 A JPS55133726 A JP S55133726A
Authority
JP
Japan
Prior art keywords
core wire
foot
heater
reinforcing core
wire
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.)
Pending
Application number
JP4128479A
Other languages
Japanese (ja)
Inventor
Iwao Sato
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4128479A priority Critical patent/JPS55133726A/en
Publication of JPS55133726A publication Critical patent/JPS55133726A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes

Abstract

PURPOSE:To mass-produce a heater with a reinforcing core wire at its foot portion by forming a porous insulating layer on the reinforcing core wire and a heating wire by a spraying method in order to make the dissolution of the reinforcing core wire easier. CONSTITUTION:The porous insulating layer 105 is formed by coating the portion other than the tip of the foot 103 of a Mo core wire wound with the heating wire 104 with alumina powder by a spraying method, followed by a sintering treatment. Then, the portion corresponding to the foot 103 of the heater 111 is held by a clip in a tank of a nitric acid-sulfuric acid mixed solution, the portion corresponding to the negative heating portion 102 is hanged down, and the portion other than the foot 103 and the clip is dipped in the said mixed solution which comes into contact directly with the Mo core wire through the pores of the layer 105 to dissolve it, leaving the Mo core wire inside the foot 103 intact. Thus, the heater with the Mo core wire as a reinforcing core at its foot can be easily mass-produced.
JP4128479A 1979-04-04 1979-04-04 Manufacture of heater for electron tube Pending JPS55133726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4128479A JPS55133726A (en) 1979-04-04 1979-04-04 Manufacture of heater for electron tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4128479A JPS55133726A (en) 1979-04-04 1979-04-04 Manufacture of heater for electron tube

Publications (1)

Publication Number Publication Date
JPS55133726A true JPS55133726A (en) 1980-10-17

Family

ID=12604137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4128479A Pending JPS55133726A (en) 1979-04-04 1979-04-04 Manufacture of heater for electron tube

Country Status (1)

Country Link
JP (1) JPS55133726A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS607034A (en) * 1983-06-27 1985-01-14 Hitachi Ltd Indirectly-heated cathode heater
US4602850A (en) * 1984-03-08 1986-07-29 Vidium, Inc. Light valve display having integrated driving circuits and shield electrode

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS607034A (en) * 1983-06-27 1985-01-14 Hitachi Ltd Indirectly-heated cathode heater
JPH057812B2 (en) * 1983-06-27 1993-01-29 Hitachi Ltd
US4602850A (en) * 1984-03-08 1986-07-29 Vidium, Inc. Light valve display having integrated driving circuits and shield electrode

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