GB247568A - Improvements in means for regulating the focus in x-ray apparatus - Google Patents

Improvements in means for regulating the focus in x-ray apparatus

Info

Publication number
GB247568A
GB247568A GB3854/26A GB385426A GB247568A GB 247568 A GB247568 A GB 247568A GB 3854/26 A GB3854/26 A GB 3854/26A GB 385426 A GB385426 A GB 385426A GB 247568 A GB247568 A GB 247568A
Authority
GB
United Kingdom
Prior art keywords
disperser
cathode
filament
resistance
transformer
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
GB3854/26A
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.)
MAX LIEBERMANN
Original Assignee
MAX LIEBERMANN
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 MAX LIEBERMANN filed Critical MAX LIEBERMANN
Publication of GB247568A publication Critical patent/GB247568A/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
    • H01J35/14—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
    • 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

247,568. Liebermann, M., (trading as Muller, C. H. F. [Firm of]). Feb. 11, 1925. [Convention date]. R÷ntgen-ray tubes.-In a tube having an incandescent cathode, the area of the focal spot is automatically regulated in accordance with the current between the electrodes, by means of a focusing device connected directly to the cathode and of a cathode-ray disperser which is connected to the cathode through a resistance producing a potential difference. In one arrangement, the disperser consists of a rod 15 projecting through the centre of the cathode, which is in the form of a conical spiral attached at one end to the focusing shield 14. A resistance 10 is inserted between the filament-heating transformer circuit and the high-tension supply transformer, to which the disperser 15 is directly connected. In another arrangement the filament is a helix extending along a slot in a trough-shaped focusing device, and the disperser is a wire parallel to the axis of the filament and within the trough. The Specification as open to inspection under Sect. 91 (3) (a) mentions the use of a transformer instead of the resistance and also describes a third form in which the filament and focusing shield are similar to those first described, but the disperser is a ring situated between the electrodes and connected directly to the positive side of the high-tension transformer, between which and the anode a resistance is inserted. This subject-matter does not appear in the Specification as accepted.
GB3854/26A 1925-02-11 1926-02-10 Improvements in means for regulating the focus in x-ray apparatus Expired GB247568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE247568X 1925-02-11

Publications (1)

Publication Number Publication Date
GB247568A true GB247568A (en) 1926-09-02

Family

ID=5935402

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3854/26A Expired GB247568A (en) 1925-02-11 1926-02-10 Improvements in means for regulating the focus in x-ray apparatus

Country Status (3)

Country Link
FR (1) FR612286A (en)
GB (1) GB247568A (en)
NL (1) NL18969C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042646A1 (en) * 1996-05-07 1997-11-13 American Science And Engineering, Inc. X-ray tubes for imaging systems
US5896486A (en) * 1997-05-01 1999-04-20 Lucent Technologies Inc. Mass splice tray for optical fibers
WO2000025342A1 (en) * 1998-10-27 2000-05-04 Litton Systems, Inc. X-ray tube providing variable imaging spot size
WO2010128416A2 (en) 2009-05-05 2010-11-11 Koninklijke Philips Electronics N.V. Method and device for load dependent resizing of a focal spot of an x-ray generating device
WO2018185501A1 (en) * 2017-04-07 2018-10-11 Arvia Technology Limited Adsorbents for treating contaminated liquids

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042646A1 (en) * 1996-05-07 1997-11-13 American Science And Engineering, Inc. X-ray tubes for imaging systems
US5896486A (en) * 1997-05-01 1999-04-20 Lucent Technologies Inc. Mass splice tray for optical fibers
WO2000025342A1 (en) * 1998-10-27 2000-05-04 Litton Systems, Inc. X-ray tube providing variable imaging spot size
US6236713B1 (en) 1998-10-27 2001-05-22 Litton Systems, Inc. X-ray tube providing variable imaging spot size
WO2010128416A2 (en) 2009-05-05 2010-11-11 Koninklijke Philips Electronics N.V. Method and device for load dependent resizing of a focal spot of an x-ray generating device
WO2010128416A3 (en) * 2009-05-05 2011-01-06 Koninklijke Philips Electronics N.V. Method and device for load dependent resizing of a focal spot of an x-ray generating device
CN102415220A (en) * 2009-05-05 2012-04-11 皇家飞利浦电子股份有限公司 Method and device for load dependent resizing of a focal spot of an X-ray generating device
US8958530B2 (en) 2009-05-05 2015-02-17 Koninklijke Philips N.V. Method and device for load dependent resizing of a focal spot of an X-ray generating device
WO2018185501A1 (en) * 2017-04-07 2018-10-11 Arvia Technology Limited Adsorbents for treating contaminated liquids

Also Published As

Publication number Publication date
NL18969C (en) 1928-11-15
FR612286A (en) 1926-10-20

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