GB495441A - Improvements in and relating to x-ray tubes - Google Patents

Improvements in and relating to x-ray tubes

Info

Publication number
GB495441A
GB495441A GB13389/37A GB1338937A GB495441A GB 495441 A GB495441 A GB 495441A GB 13389/37 A GB13389/37 A GB 13389/37A GB 1338937 A GB1338937 A GB 1338937A GB 495441 A GB495441 A GB 495441A
Authority
GB
United Kingdom
Prior art keywords
filaments
anode
recesses
focusing
disposed
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
GB13389/37A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB495441A publication Critical patent/GB495441A/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
    • H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
    • H01J35/26—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof by rotation of the anode or anticathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/10—Drive means for anode (target) substrate
    • H01J2235/1006—Supports or shafts for target or substrate
    • H01J2235/1013—Fixing to the target or substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/10—Drive means for anode (target) substrate
    • H01J2235/1026—Means (motors) for driving the target (anode)

Landscapes

  • X-Ray Techniques (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

495,441. R÷ntgen-ray tubes. BRITISH THOMSON-HOUSTON CO., Ltd. May 11, 1937, No. 13389. Convention date, May 11, 1936. [Class 39 (i)] In. X-ray apparatus of the kind comprising a rotating anode 3, Fig. 3, and a cathode with a number of alternative linear filaments 28, 33, the anode has a peripherally extending target surface 18 inclined away from the cathode structure and the filaments and their focusing means are arranged side by side in the cathode structure approximately radially to the axis of rotation of the anode, the focusing means being so arranged as to cause the beams to converge to closely adjacent substantially parallel focal lines on the target. Preferably, to ensure parallelism of the focal lines, the filaments are slightly convergent in the direction of the axis of rotation of the anode as shown in Fig. 4. The alternative filaments are of different sizes to produce beams of different intensities. Preferably, provision is made for forming a beam which is of greater intensity on the side first entered by the moving target than on the leaving side. For this purpose, the focusing cup is provided with recesses in which the metal surrounding the recesses is unsymmetrically disposed with respect to the filaments. Alternatively, a symmetrical focusing cup may be used with an unsymmetrically disposed filament or with two unequal filaments disposed on opposite sides of the symmetrical plane of the recesses. The invention is described as applied to apparatus as described in Specifications 495,435 and 495,440. Specification 424,822 also is referred to.
GB13389/37A 1936-05-11 1937-05-11 Improvements in and relating to x-ray tubes Expired GB495441A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78995A US2121631A (en) 1936-05-11 1936-05-11 X-ray tube

Publications (1)

Publication Number Publication Date
GB495441A true GB495441A (en) 1938-11-11

Family

ID=22147457

Family Applications (2)

Application Number Title Priority Date Filing Date
GB13192/37A Expired GB495435A (en) 1936-05-11 1937-05-08 Improvements in and relating to x-ray apparatus
GB13389/37A Expired GB495441A (en) 1936-05-11 1937-05-11 Improvements in and relating to x-ray tubes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB13192/37A Expired GB495435A (en) 1936-05-11 1937-05-08 Improvements in and relating to x-ray apparatus

Country Status (3)

Country Link
US (1) US2121631A (en)
DE (1) DE708479C (en)
GB (2) GB495435A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764706A (en) * 1952-12-26 1956-09-25 Dunlee Corp Hooded anode x-ray tube with tilted target
DE1036405B (en) * 1954-09-13 1958-08-14 Gen Electric X-ray tube
DE1062827B (en) * 1957-10-12 1959-08-06 Siemens Reiniger Werke Ag Rotating anode X-ray tube
US4065689A (en) * 1974-11-29 1977-12-27 Picker Corporation Dual filament X-ray tube
JP4669428B2 (en) 2005-04-19 2011-04-13 株式会社リガク X-ray tube
US8553843B2 (en) 2008-12-17 2013-10-08 Koninklijke Philips N.V. Attachment of a high-Z focal track layer to a carbon-carbon composite substrate serving as a rotary anode target
JP6638966B2 (en) * 2016-06-20 2020-02-05 キヤノン電子管デバイス株式会社 X-ray tube
JP6951027B2 (en) * 2017-08-14 2021-10-20 キヤノン電子管デバイス株式会社 X-ray tube

Also Published As

Publication number Publication date
DE708479C (en) 1941-07-22
GB495435A (en) 1938-11-08
US2121631A (en) 1938-06-21

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