IN2014DN09573A - - Google Patents

Info

Publication number
IN2014DN09573A
IN2014DN09573A IN9573DEN2014A IN2014DN09573A IN 2014DN09573 A IN2014DN09573 A IN 2014DN09573A IN 9573DEN2014 A IN9573DEN2014 A IN 9573DEN2014A IN 2014DN09573 A IN2014DN09573 A IN 2014DN09573A
Authority
IN
India
Prior art keywords
ribbon
spiral pattern
spiral
miniature
machined
Prior art date
Application number
Inventor
David J Caruso
Mark T ; Dinsmore
Original Assignee
Thermo Scient Portable Analytical Instr 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 Thermo Scient Portable Analytical Instr Inc filed Critical Thermo Scient Portable Analytical Instr Inc
Publication of IN2014DN09573A publication Critical patent/IN2014DN09573A/en

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
    • H01J1/15—Cathodes heated directly by an electric current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/06—Cathodes
    • H01J35/064—Details of the emitter, e.g. material or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
    • H01J35/147—Spot size control
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/06—Cathode assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • Y10T29/49208—Contact or terminal manufacturing by assembling plural parts

Landscapes

  • Solid Thermionic Cathode (AREA)
  • X-Ray Techniques (AREA)

Abstract

An electrically heated planar cathode for use in miniature x-ray tubes may be spiral design laser cut from a thin tantalum alloy ribbon foil (116) with grain stabilizing features. Bare ribbon is mounted to an aluminum nitride substrate (110) in a manner that is puts the ribbon in minimal tension before it is machined into the spiral pattern (118). The spiral pattern can be optimized for electrical , thermal , and emission characteristics.
IN9573DEN2014 2012-05-10 2013-05-10 IN2014DN09573A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/468,886 US8525411B1 (en) 2012-05-10 2012-05-10 Electrically heated planar cathode
PCT/US2013/040553 WO2013170149A1 (en) 2012-05-10 2013-05-10 An electrically heated planar cathode

Publications (1)

Publication Number Publication Date
IN2014DN09573A true IN2014DN09573A (en) 2015-07-17

Family

ID=48534493

Family Applications (1)

Application Number Title Priority Date Filing Date
IN9573DEN2014 IN2014DN09573A (en) 2012-05-10 2013-05-10

Country Status (6)

Country Link
US (2) US8525411B1 (en)
EP (1) EP2847780B1 (en)
JP (1) JP6238467B2 (en)
CN (1) CN104272423B (en)
IN (1) IN2014DN09573A (en)
WO (1) WO2013170149A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112635275B (en) * 2020-12-09 2022-04-26 武汉联影医疗科技有限公司 Flat emitter and X-ray tube

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290543A (en) * 1963-06-03 1966-12-06 Varian Associates Grain oriented dispenser thermionic emitter for electron discharge device
DE19510048C2 (en) * 1995-03-20 1998-05-14 Siemens Ag X-ray tube
US6259193B1 (en) * 1998-06-08 2001-07-10 General Electric Company Emissive filament and support structure
US6663982B1 (en) * 2002-06-18 2003-12-16 Sandia Corporation Silver-hafnium braze alloy
JP4112449B2 (en) * 2003-07-28 2008-07-02 株式会社東芝 Discharge electrode and discharge lamp
CA2697845A1 (en) 2007-09-04 2009-03-12 Thermo Niton Analyzers Llc X-ray tube with enhanced small spot cathode and methods for manufacture thereof
GB0901338D0 (en) * 2009-01-28 2009-03-11 Cxr Ltd X-Ray tube electron sources
US20100239828A1 (en) 2009-03-19 2010-09-23 Cornaby Sterling W Resistively heated small planar filament
US8385506B2 (en) * 2010-02-02 2013-02-26 General Electric Company X-ray cathode and method of manufacture thereof

Also Published As

Publication number Publication date
US20130301804A1 (en) 2013-11-14
WO2013170149A1 (en) 2013-11-14
EP2847780B1 (en) 2023-04-19
EP2847780A1 (en) 2015-03-18
JP6238467B2 (en) 2017-11-29
CN104272423A (en) 2015-01-07
US8525411B1 (en) 2013-09-03
JP2015519705A (en) 2015-07-09
US8766538B2 (en) 2014-07-01
CN104272423B (en) 2017-10-03

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