GB1027404A - Indirectly heated cathode - Google Patents

Indirectly heated cathode

Info

Publication number
GB1027404A
GB1027404A GB11274/64D GB1127464D GB1027404A GB 1027404 A GB1027404 A GB 1027404A GB 11274/64 D GB11274/64 D GB 11274/64D GB 1127464 D GB1127464 D GB 1127464D GB 1027404 A GB1027404 A GB 1027404A
Authority
GB
United Kingdom
Prior art keywords
heater wire
heater
coating
cathode
collar
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
GB11274/64D
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Priority claimed from BE645648A external-priority patent/BE645648A/fr
Publication of GB1027404A publication Critical patent/GB1027404A/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
    • H01J1/22—Heaters

Landscapes

  • Microwave Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

1,027,404. Thermionic cathode constructions. RADIO CORPORATION OF AMERICA. March 17, 1964 [March 27, 1963], No. 11274/64. Heading H1D. A tubular cathode surrounds a heater assembly which includes a coil of heater wire mounted on an insulating hollow cylinder which surrounds, and at one end is supported by a metal collar which is joined to, a coaxial conductive rod, one end of the heater wire being clamped between the collar and the end of the insulating cylinder, such that the conductive rod constitutes one lead-in for the heater wire. The tungsten heater wire 30 for the tubular nickel cathode 10, having an emissive coating 14, is insulated with an alumina coating, and mounted on a ceramic tube 26. Nickel collar 34, which is insulated from the apertured upper end 20 of the cathode tube by an alumina disc 44, is apertured to receive and support the conductive rod 36, and is brazed to a copper coating 56 on the upper end of cylinder 26, one end 54 of the heater wire being embedded in the coating, such that rod 36 and flange 48 constitute a leadin for the heater. The lower end of the heater wire is embedded in a similar coating brazed to collar 38, which is welded to the cathode tube at 42 to provide the second heater lead-in via portion 18, which is thinned to reduce heat loss, and the flange 16.
GB11274/64D 1963-03-27 1964-03-17 Indirectly heated cathode Expired GB1027404A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US268387A US3225246A (en) 1963-03-27 1963-03-27 Indirectly heated cathode
BE645648A BE645648A (en) 1963-03-27 1964-03-24

Publications (1)

Publication Number Publication Date
GB1027404A true GB1027404A (en) 1966-04-27

Family

ID=25655781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11274/64D Expired GB1027404A (en) 1963-03-27 1964-03-17 Indirectly heated cathode

Country Status (6)

Country Link
US (1) US3225246A (en)
DE (1) DE1257981B (en)
FR (1) FR1386875A (en)
GB (1) GB1027404A (en)
NL (1) NL6403305A (en)
SE (1) SE303806B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114513868A (en) * 2022-02-18 2022-05-17 哈尔滨工业大学 Electric heater assembly of electric propulsion hollow cathode

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293909B (en) * 1965-11-16 1969-04-30 Philips Patentverwaltung Incandescent cathode for an electrical discharge tube with a heat trap
US3737711A (en) * 1968-11-21 1973-06-05 Varian Associates Electron tube having an improved filamentary cathode and support therefor and method of making same
JPS5824370Y2 (en) * 1977-02-04 1983-05-25 株式会社日立製作所 magnetron

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL37515C (en) * 1927-10-15
US1941074A (en) * 1930-09-17 1933-12-26 Bell Telephone Labor Inc Electric discharge device
DE745133C (en) * 1935-06-27 1944-02-26 Aeg Indirectly heated cathode for electrical discharge vessels
DE763222C (en) * 1938-08-23 1954-10-04 Siemens & Halske A G Indirectly heated glow cathode for electron beam tubes
US2510639A (en) * 1948-03-02 1950-06-06 Gen Electric Cavity resonator system
US2842701A (en) * 1954-12-22 1958-07-08 Raytheon Mfg Co Cathode heater assemblies
DE1138483B (en) * 1957-11-29 1962-10-25 Eitel Mccullough Inc High performance electron tube for high frequencies

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114513868A (en) * 2022-02-18 2022-05-17 哈尔滨工业大学 Electric heater assembly of electric propulsion hollow cathode
CN114513868B (en) * 2022-02-18 2022-09-09 哈尔滨工业大学 Electric heater assembly of electric propulsion hollow cathode

Also Published As

Publication number Publication date
FR1386875A (en) 1965-01-22
SE303806B (en) 1968-09-09
US3225246A (en) 1965-12-21
NL6403305A (en) 1964-09-28
DE1257981B (en) 1968-01-04

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