GB1155159A - Improvements in or relating to Indirectly Heated Dispenser Cathodes for Electrical Discharge Vessels - Google Patents

Improvements in or relating to Indirectly Heated Dispenser Cathodes for Electrical Discharge Vessels

Info

Publication number
GB1155159A
GB1155159A GB35914/67A GB3591467A GB1155159A GB 1155159 A GB1155159 A GB 1155159A GB 35914/67 A GB35914/67 A GB 35914/67A GB 3591467 A GB3591467 A GB 3591467A GB 1155159 A GB1155159 A GB 1155159A
Authority
GB
United Kingdom
Prior art keywords
plate
zirconium
cathode
carbon
porous plate
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
GB35914/67A
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
Publication of GB1155159A publication Critical patent/GB1155159A/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
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

1,155,159. Cathode materials and processing. SIEMENS A.G. 4 Aug., 1967 [5 Aug., 1966], No. 35914/67. Heading H1D. [Also in Division C7] In an indirectly heated dispenser cathode of the metal capillary type in which emissive material migrates through the pores in a porous plate from a dispenser arranged behind the rear surface of the plate to spread over the emissive surface of the porous plate, the porous plate is formed of carbon and its emissive surface has an intermediate layer of one or more of the carbides of Mo, W, Ta, Ti or, particularly, Zr and an outer metal coating of tungsten and/or a platinum-group metal. As shown, the porous plate 1 of the main cathode is heated by electron bombardment from an auxiliary dispenser cathode 6 which also serves as the supply of emissive material, e.g. barium, for the carbon plate 1. The zirconium carbide layer 11 may be formed on the carbon plate 1 by immersing the plate in a 4% solution of zirconium acetylacetonate, decomposing the zirconium compound so deposited in a dry hydrogen atmosphere for about 10 minutes at 1200‹ C., spraying at least that surface of the plate which is to receive the metal coating with a suspension of zirconium in butyl acetate to form a compacted zirconium carbide layer and annealing the plate in vacuo at 1800‹ C.
GB35914/67A 1966-08-05 1967-08-04 Improvements in or relating to Indirectly Heated Dispenser Cathodes for Electrical Discharge Vessels Expired GB1155159A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES105208A DE1283403B (en) 1966-08-05 1966-08-05 Indirectly heated storage cathode for electrical discharge vessels

Publications (1)

Publication Number Publication Date
GB1155159A true GB1155159A (en) 1969-06-18

Family

ID=7526393

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35914/67A Expired GB1155159A (en) 1966-08-05 1967-08-04 Improvements in or relating to Indirectly Heated Dispenser Cathodes for Electrical Discharge Vessels

Country Status (4)

Country Link
US (1) US3454816A (en)
DE (1) DE1283403B (en)
GB (1) GB1155159A (en)
NL (1) NL6709440A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013201A1 (en) * 1978-12-27 1980-07-09 Thomson-Csf Directly heated cathode and high frequency electron tube comprising such a cathode
GB2225158A (en) * 1988-11-12 1990-05-23 Samsung Electronic Devices Manufacturing dispenser cathodes of electron guns

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1539156B2 (en) * 1965-06-30 1976-09-23 Siemens AG, 1000 Berlin und 8000 München GETTER PUMP ARRANGEMENT FOR ELECTRON BEAM TUBES AND METHOD FOR MANUFACTURING GETTERABLE SINTER SHAPED BODIES
US4019081A (en) * 1974-10-25 1977-04-19 Bbc Brown Boveri & Company Limited Reaction cathode
DE2650656B2 (en) * 1976-11-05 1978-09-07 Philips Patentverwaltung Gmbh, 2000 Hamburg Cathode for electron tubes
CH629033A5 (en) * 1978-05-05 1982-03-31 Bbc Brown Boveri & Cie GLOWH CATHODE.
GB2050045A (en) * 1979-05-29 1980-12-31 Emi Varian Ltd Thermionic cathode
KR100291903B1 (en) * 1993-08-23 2001-09-17 김순택 Oxide cathode of cathode ray tube
KR950012511A (en) * 1993-10-05 1995-05-16 이헌조 Impregnated Cathode for Cathode Ray Tubes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010046A (en) * 1952-02-26 1961-11-21 Westinghouse Electric Corp Cathode structure
BE519027A (en) * 1952-04-09
DE1217503B (en) * 1964-12-02 1966-05-26 Siemens Ag Storage cathode for electrical discharge vessels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013201A1 (en) * 1978-12-27 1980-07-09 Thomson-Csf Directly heated cathode and high frequency electron tube comprising such a cathode
GB2225158A (en) * 1988-11-12 1990-05-23 Samsung Electronic Devices Manufacturing dispenser cathodes of electron guns
GB2225158B (en) * 1988-11-12 1993-01-13 Samsung Electronic Devices Manufacturing method for dispenser cathode of an electron gun

Also Published As

Publication number Publication date
DE1283403B (en) 1968-11-21
US3454816A (en) 1969-07-08
NL6709440A (en) 1968-02-06

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