GB247568A - Improvements in means for regulating the focus in x-ray apparatus - Google Patents
Improvements in means for regulating the focus in x-ray apparatusInfo
- 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
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.
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)
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 |
-
1926
- 1926-01-30 NL NL32462A patent/NL18969C/en active
- 1926-02-09 FR FR612286D patent/FR612286A/en not_active Expired
- 1926-02-10 GB GB3854/26A patent/GB247568A/en not_active Expired
Cited By (9)
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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