EP0045932A3 - Indirectly heated cathode associated with a wehnelt cylinder - Google Patents

Indirectly heated cathode associated with a wehnelt cylinder Download PDF

Info

Publication number
EP0045932A3
EP0045932A3 EP81106086A EP81106086A EP0045932A3 EP 0045932 A3 EP0045932 A3 EP 0045932A3 EP 81106086 A EP81106086 A EP 81106086A EP 81106086 A EP81106086 A EP 81106086A EP 0045932 A3 EP0045932 A3 EP 0045932A3
Authority
EP
European Patent Office
Prior art keywords
indirectly heated
heated cathode
wehnelt cylinder
cathode associated
wehnelt
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.)
Granted
Application number
EP81106086A
Other languages
German (de)
Other versions
EP0045932B1 (en
EP0045932A2 (en
Inventor
Eberhard Weiss
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.)
International Standard Electric Corp
Original Assignee
International Standard 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of EP0045932A2 publication Critical patent/EP0045932A2/en
Publication of EP0045932A3 publication Critical patent/EP0045932A3/en
Application granted granted Critical
Publication of EP0045932B1 publication Critical patent/EP0045932B1/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
EP81106086A 1980-08-07 1981-08-04 Method for shortening the heatingtime of an indirectly heated cathode Expired EP0045932B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3029853A DE3029853C2 (en) 1980-08-07 1980-08-07 Wehnelt cathode indirectly heated by electron impact
DE3029853 1980-08-07

Publications (3)

Publication Number Publication Date
EP0045932A2 EP0045932A2 (en) 1982-02-17
EP0045932A3 true EP0045932A3 (en) 1982-06-09
EP0045932B1 EP0045932B1 (en) 1986-05-07

Family

ID=6109051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106086A Expired EP0045932B1 (en) 1980-08-07 1981-08-04 Method for shortening the heatingtime of an indirectly heated cathode

Country Status (6)

Country Link
US (1) US4401919A (en)
EP (1) EP0045932B1 (en)
JP (1) JPS57118333A (en)
CA (1) CA1182165A (en)
DE (2) DE3029853C2 (en)
FI (1) FI71853C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644286A1 (en) * 1989-03-07 1990-09-14 Thomson Tubes Electroniques ELECTRON BEAM GENERATOR AND ELECTRONIC DEVICES USING SUCH A GENERATOR
DE19800766C1 (en) * 1998-01-12 1999-07-29 Siemens Ag Electron beam tube especially X=ray tube
US6091187A (en) * 1998-04-08 2000-07-18 International Business Machines Corporation High emittance electron source having high illumination uniformity
US8581481B1 (en) 2011-02-25 2013-11-12 Applied Physics Technologies, Inc. Pre-aligned thermionic emission assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1485124A (en) * 1965-06-30 1967-06-16 Siemens Ag Electronic cannon for electron tubes
DE1589941A1 (en) * 1966-05-23 1970-04-16 Ibm Surface electrode with a surface area that acts as a charge carrier source
DE2134513A1 (en) * 1971-07-10 1973-01-25 Westinghouse Electric Corp ELECTRON EMITTING SOURCE WITH A CATHODE ELEMENT AND AN ARRANGEMENT FOR HEATING THE CATHODE ELEMENT
FR2194043A1 (en) * 1972-07-20 1974-02-22 Jeol Ltd
FR2222747A1 (en) * 1973-03-20 1974-10-18 Int Standard Electric Corp

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2291864A (en) * 1941-06-28 1942-08-04 Electronic Res Corp Electric discharge device
NL153018B (en) * 1967-02-17 1977-04-15 Philips Nv INDIRECTLY HEATED CATHODE.
US3569768A (en) * 1968-11-21 1971-03-09 Sylvania Electric Prod Cathode sleeve effecting maximum heat transfer to top of cathode cap and minimum to cap wall
US3914638A (en) * 1972-05-24 1975-10-21 Gte Sylvania Inc Cathode structure for cathode ray tube
DE2317445C3 (en) * 1973-04-06 1982-09-09 Standard Elektrik Lorenz Ag, 7000 Stuttgart Method for manufacturing a heater for an indirectly heated cathode
DE2317446C3 (en) * 1973-04-06 1983-11-10 Standard Elektrik Lorenz Ag, 7000 Stuttgart Method of manufacturing a heating element for an indirectly heated cathode
DE2364403C3 (en) * 1973-12-22 1978-06-08 Standard Elektrik Lorenz Ag, 7000 Stuttgart Method for manufacturing a heater for an indirectly heated cathode
DE2654553A1 (en) * 1976-12-02 1978-06-08 Standard Elektrik Lorenz Ag Cathode for TV CRT - has cap with emission layer and plates close to heater to increase heat transfer
DE2938248A1 (en) * 1979-09-21 1981-03-26 Standard Elektrik Lorenz AG, 70435 Stuttgart HEATING ELEMENT FOR AN INDIRECTLY HEATED CATHODE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1485124A (en) * 1965-06-30 1967-06-16 Siemens Ag Electronic cannon for electron tubes
DE1589941A1 (en) * 1966-05-23 1970-04-16 Ibm Surface electrode with a surface area that acts as a charge carrier source
DE2134513A1 (en) * 1971-07-10 1973-01-25 Westinghouse Electric Corp ELECTRON EMITTING SOURCE WITH A CATHODE ELEMENT AND AN ARRANGEMENT FOR HEATING THE CATHODE ELEMENT
FR2194043A1 (en) * 1972-07-20 1974-02-22 Jeol Ltd
FR2222747A1 (en) * 1973-03-20 1974-10-18 Int Standard Electric Corp

Also Published As

Publication number Publication date
FI71853B (en) 1986-10-31
DE3174562D1 (en) 1986-06-12
FI812424L (en) 1982-02-08
EP0045932B1 (en) 1986-05-07
CA1182165A (en) 1985-02-05
DE3029853C2 (en) 1982-08-26
JPS57118333A (en) 1982-07-23
EP0045932A2 (en) 1982-02-17
FI71853C (en) 1987-02-09
US4401919A (en) 1983-08-30
DE3029853A1 (en) 1982-02-18

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