GB2259402B - Thermally graded filament assembly - Google Patents

Thermally graded filament assembly

Info

Publication number
GB2259402B
GB2259402B GB9211896A GB9211896A GB2259402B GB 2259402 B GB2259402 B GB 2259402B GB 9211896 A GB9211896 A GB 9211896A GB 9211896 A GB9211896 A GB 9211896A GB 2259402 B GB2259402 B GB 2259402B
Authority
GB
United Kingdom
Prior art keywords
filament assembly
thermally graded
graded
thermally
filament
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 - Fee Related
Application number
GB9211896A
Other versions
GB2259402A (en
GB9211896D0 (en
Inventor
George A Solomon
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.)
Burle Technologies Inc
Original Assignee
Burle Technologies Inc
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 Burle Technologies Inc filed Critical Burle Technologies Inc
Publication of GB9211896D0 publication Critical patent/GB9211896D0/en
Publication of GB2259402A publication Critical patent/GB2259402A/en
Application granted granted Critical
Publication of GB2259402B publication Critical patent/GB2259402B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/04—Cathodes
    • H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/28—Heaters for thermionic cathodes
    • H01J2201/2803—Characterised by the shape or size
    • H01J2201/2867—Spiral or helix
GB9211896A 1991-09-06 1992-06-05 Thermally graded filament assembly Expired - Fee Related GB2259402B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75580091A 1991-09-06 1991-09-06

Publications (3)

Publication Number Publication Date
GB9211896D0 GB9211896D0 (en) 1992-07-15
GB2259402A GB2259402A (en) 1993-03-10
GB2259402B true GB2259402B (en) 1995-04-26

Family

ID=25040714

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9211896A Expired - Fee Related GB2259402B (en) 1991-09-06 1992-06-05 Thermally graded filament assembly

Country Status (1)

Country Link
GB (1) GB2259402B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1181574A (en) * 1966-05-27 1970-02-18 Thomson Houston Comp Francaise Improvements in and relating to Electron Tubes.
GB1232159A (en) * 1968-08-17 1971-05-19
GB2000633A (en) * 1977-07-01 1979-01-10 Raytheon Co Microwave tubes incorporating rare earth magnets
GB2030000A (en) * 1978-08-02 1980-03-26 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Seal for lead-in wires
GB1577982A (en) * 1977-03-28 1980-10-29 Heimann Gmbh Gas discharge tubes
US4310786A (en) * 1979-09-12 1982-01-12 Kumpfer Beverly D Magnetron tube with improved low cost structure
US4489254A (en) * 1980-09-22 1984-12-18 Tokyo Shibaura Denki Kabushiki Kaisha Magnetron
US4494034A (en) * 1982-12-09 1985-01-15 Rca Corporation Magnetron filament having a quadrilateral cross-section

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1181574A (en) * 1966-05-27 1970-02-18 Thomson Houston Comp Francaise Improvements in and relating to Electron Tubes.
GB1232159A (en) * 1968-08-17 1971-05-19
GB1577982A (en) * 1977-03-28 1980-10-29 Heimann Gmbh Gas discharge tubes
GB2000633A (en) * 1977-07-01 1979-01-10 Raytheon Co Microwave tubes incorporating rare earth magnets
GB2030000A (en) * 1978-08-02 1980-03-26 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Seal for lead-in wires
US4310786A (en) * 1979-09-12 1982-01-12 Kumpfer Beverly D Magnetron tube with improved low cost structure
US4489254A (en) * 1980-09-22 1984-12-18 Tokyo Shibaura Denki Kabushiki Kaisha Magnetron
US4494034A (en) * 1982-12-09 1985-01-15 Rca Corporation Magnetron filament having a quadrilateral cross-section

Also Published As

Publication number Publication date
GB2259402A (en) 1993-03-10
GB9211896D0 (en) 1992-07-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990605