GB659798A - Improvements in and relating to x-ray tubes - Google Patents

Improvements in and relating to x-ray tubes

Info

Publication number
GB659798A
GB659798A GB28730/45A GB2873045A GB659798A GB 659798 A GB659798 A GB 659798A GB 28730/45 A GB28730/45 A GB 28730/45A GB 2873045 A GB2873045 A GB 2873045A GB 659798 A GB659798 A GB 659798A
Authority
GB
United Kingdom
Prior art keywords
columbium
ray tubes
ray tube
cathode
heated
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
GB28730/45A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to GB28730/45A priority Critical patent/GB659798A/en
Priority to FR934823D priority patent/FR934823A/en
Publication of GB659798A publication Critical patent/GB659798A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J35/066—Details of electron optical components, e.g. cathode cups

Landscapes

  • X-Ray Techniques (AREA)

Abstract

659,798. X-ray tubes. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). Oct. 30, 1945, No. 28730. [Class 39 (i)] An X-ray tube has an indirectly-heated thermionic emitting cathode having a surface of columbium. The X-ray tube shown in Fig. 1 comprises a glass or metal envelope 4 containing a cathode 11 having a columbium surface heated by a tungsten filament 6 and a copper anode 9, which may be rotating, with a flat or curved tungsten button target 8 slanted towards the window 10. The columbium emitter may be restricted to a given area to produce a focal spot of desired shape and may be in tube, strip, helix or disc form. Specification 659,797 is referred to.
GB28730/45A 1945-10-30 1945-10-30 Improvements in and relating to x-ray tubes Expired GB659798A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB28730/45A GB659798A (en) 1945-10-30 1945-10-30 Improvements in and relating to x-ray tubes
FR934823D FR934823A (en) 1945-10-30 1946-10-15 X-ray tube enhancements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28730/45A GB659798A (en) 1945-10-30 1945-10-30 Improvements in and relating to x-ray tubes

Publications (1)

Publication Number Publication Date
GB659798A true GB659798A (en) 1951-10-31

Family

ID=10280179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28730/45A Expired GB659798A (en) 1945-10-30 1945-10-30 Improvements in and relating to x-ray tubes

Country Status (2)

Country Link
FR (1) FR934823A (en)
GB (1) GB659798A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026298A1 (en) * 1990-08-20 1992-02-27 Siemens Ag Long life X=ray tube - has electron emitter based on rare earth material alloy
DE4026300A1 (en) * 1990-08-20 1992-02-27 Siemens Ag Electron emitter for X=ray tube - is of material contg. rare earth element covering support layer of large flat surface withstanding vibration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026298A1 (en) * 1990-08-20 1992-02-27 Siemens Ag Long life X=ray tube - has electron emitter based on rare earth material alloy
DE4026300A1 (en) * 1990-08-20 1992-02-27 Siemens Ag Electron emitter for X=ray tube - is of material contg. rare earth element covering support layer of large flat surface withstanding vibration

Also Published As

Publication number Publication date
FR934823A (en) 1948-06-02

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