JPS5574032A - Indirectly-heated cathode - Google Patents

Indirectly-heated cathode

Info

Publication number
JPS5574032A
JPS5574032A JP14761278A JP14761278A JPS5574032A JP S5574032 A JPS5574032 A JP S5574032A JP 14761278 A JP14761278 A JP 14761278A JP 14761278 A JP14761278 A JP 14761278A JP S5574032 A JPS5574032 A JP S5574032A
Authority
JP
Japan
Prior art keywords
cathode
heater
heat
shielding plate
indirectly
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
JP14761278A
Other languages
Japanese (ja)
Inventor
Tatsuo Onozawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14761278A priority Critical patent/JPS5574032A/en
Publication of JPS5574032A publication Critical patent/JPS5574032A/en
Pending legal-status Critical Current

Links

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE: To lower the temperature of heater for heating the cathode and prolong a life of the cathode, by providing a heater for heating a thermally shielding plate of the indirectly-heated cathode.
CONSTITUTION: A generated heat in an alumina coated tungsten heater 12, mainly by heat radiation, heats an impregnated cathode 10 and a cathode tube 11 to the prescribed temperature. Though this heat is released to outside, a heat shielding plate 13 plays a role of returning this heat partially to the cathode tube 11. Accordingly, in a method with the heat shielding plate 13 heated by a heat shielding plate heating heater 16, a temperature of the alumina coated tungsten heater 12 can be lowered, capable of preventing the alumina from being made glassy and the heater from being thermally deformed, thus a life of the indirectly-heated cathode can be prolonged.
COPYRIGHT: (C)1980,JPO&Japio
JP14761278A 1978-11-29 1978-11-29 Indirectly-heated cathode Pending JPS5574032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14761278A JPS5574032A (en) 1978-11-29 1978-11-29 Indirectly-heated cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14761278A JPS5574032A (en) 1978-11-29 1978-11-29 Indirectly-heated cathode

Publications (1)

Publication Number Publication Date
JPS5574032A true JPS5574032A (en) 1980-06-04

Family

ID=15434254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14761278A Pending JPS5574032A (en) 1978-11-29 1978-11-29 Indirectly-heated cathode

Country Status (1)

Country Link
JP (1) JPS5574032A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4211922Y1 (en) * 1966-01-11 1967-07-05
JPS503568A (en) * 1973-04-09 1975-01-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4211922Y1 (en) * 1966-01-11 1967-07-05
JPS503568A (en) * 1973-04-09 1975-01-14

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