GB225540A - Improvements in or relating to x-ray tubes - Google Patents

Improvements in or relating to x-ray tubes

Info

Publication number
GB225540A
GB225540A GB27834/24A GB2783424A GB225540A GB 225540 A GB225540 A GB 225540A GB 27834/24 A GB27834/24 A GB 27834/24A GB 2783424 A GB2783424 A GB 2783424A GB 225540 A GB225540 A GB 225540A
Authority
GB
United Kingdom
Prior art keywords
spiral
cathode
focusing device
distance
ray tubes
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
GB27834/24A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB225540A publication Critical patent/GB225540A/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
    • H01J35/064—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
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/06—Cathodes
    • H01J35/066—Details of electron optical components, e.g. cathode cups

Landscapes

  • Luminescent Compositions (AREA)

Abstract

225,540. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. Nov. 26, 1923, [Convention date]. R÷ntgen-ray tubes.-In a tube having an incandescent cathode and a focusing device the part of the cathode which emits electrons is arranged at a distance of at least 1.5 mm. from the geometrical axis of the focusing device. The cathode may consist of a flat spiral 1 one or more turns of which are rendered inactive by means of a lead 8 connected as shown between an intermediate turn and a molybdenum rod 4 in which the bent inner end 3 of the spiral is secured, and from which it may be insulated, or the spiral may be wound with the innermost turn at the desired distance from the axis. The outer end of the spiral is connected with the focusing device 2, and an additional support in the form of a hook 9 may be connected with the spiral at a distance of at least 10‹ from the end.
GB27834/24A 1923-11-26 1924-11-20 Improvements in or relating to x-ray tubes Expired GB225540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL225540X 1923-11-26

Publications (1)

Publication Number Publication Date
GB225540A true GB225540A (en) 1925-04-16

Family

ID=19779633

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27834/24A Expired GB225540A (en) 1923-11-26 1924-11-20 Improvements in or relating to x-ray tubes

Country Status (2)

Country Link
FR (1) FR588036A (en)
GB (1) GB225540A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016529685A (en) * 2013-09-10 2016-09-23 モックステック・インコーポレーテッド Double tube support for electron emitters

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679219A (en) * 1984-06-15 1987-07-07 Kabushiki Kaisha Toshiba X-ray tube
DE102006018633B4 (en) * 2006-04-21 2011-12-29 Siemens Ag Surface emitter and X-ray tube with surface emitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016529685A (en) * 2013-09-10 2016-09-23 モックステック・インコーポレーテッド Double tube support for electron emitters

Also Published As

Publication number Publication date
FR588036A (en) 1925-04-28

Similar Documents

Publication Publication Date Title
US2091443A (en) Shielded electrode tube
GB225540A (en) Improvements in or relating to x-ray tubes
GB211450A (en) Improvements in and relating to x-ray tubes
US2358200A (en) Grid assembly structure
US1991282A (en) Electron tube
US2117842A (en) Electrode
US1902502A (en) X-ray tube
US1992975A (en) X-ray tube and cathode therefor
GB242915A (en) Improvements in or relating to x-ray tubes comprising an incandescent cathode
GB222561A (en) Improved manufacture of electrodes for electric discharge-tubes
US2024695A (en) Electron discharge tube
GB281262A (en) Improvements in or relating to electron emitting cathodes
GB433520A (en) Improved incandescent cathode
GB440138A (en) Improvements in or relating to electric discharge vessels
GB438343A (en) Improvements relating to indirectly heated cathodes for cathode ray tubes
GB244350A (en) Improvements in or relating to x-ray tubes and installations for operating same
GB430975A (en) Improvements in or relating to electric discharge tubes
GB217647A (en) Improvements in or relating to vacuum electric tube devices
GB289975A (en) Improvements in or relating to electric vacuum or gas-filled tubes
GB232202A (en) Improvements in or relating to x-ray tubes provided with an incandescent cathode and an envelope which consists partly of insulating material and partly of metal
GB230497A (en) Improvements in or relating to x-ray tubes
GB271885A (en) Improvements in or relating to vacuum electric tube devices
GB453214A (en) Improvements in or relating to indirectly heated cathodes for electron discharge tubes
GB232201A (en) Improvements in or relating to incandescent cathodes for discharge tubes
GB387275A (en) Improvements in and relating to cathode ray tubes