GB651507A - Improvement in x-ray tubes - Google Patents

Improvement in x-ray tubes

Info

Publication number
GB651507A
GB651507A GB6772/49A GB677249A GB651507A GB 651507 A GB651507 A GB 651507A GB 6772/49 A GB6772/49 A GB 6772/49A GB 677249 A GB677249 A GB 677249A GB 651507 A GB651507 A GB 651507A
Authority
GB
United Kingdom
Prior art keywords
anticathode
filament
recess
focusing member
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
GB6772/49A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB651507A publication Critical patent/GB651507A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • 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)
  • Microwave Tubes (AREA)

Abstract

651,507. X-ray tubes. POITTEVIN, M. Nov. 22, 1946, No. 6772/49. Divided out of 651,455 under which a Specification was laid open to inspection under Sect. 91 of the Acts, June 16, 1947. Drawings to Specification. [Class 39 (i)] In an X-ray tube a straight filament is contained in a recess in a focusing member, the recess having a circular curvature whose centre is located on or near the front surface of the anticathode, and the focusing member having a face plane or curved relative to the anticathode. A linear focus whose major dimension is perpendicular to the plane containing the curved axis of the recess, is obtained. The filament may comprise a helix or simply a wire. The filament-anticathode distance may be adjusted by rotation of the anticathode along a screw shaft by means of a rotating magnetic field. Alternatively a corrugated metal tube inserted in the envelope proper, or in a stem supporting the filament structure, may be expanded or contracted. The anticathode may be trunco-conical or pyramidal with a circular or polygonal face. Specification 651,455 is referred to.
GB6772/49A 1946-05-09 1946-11-22 Improvement in x-ray tubes Expired GB651507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR944917T 1946-05-09

Publications (1)

Publication Number Publication Date
GB651507A true GB651507A (en) 1951-04-04

Family

ID=33548389

Family Applications (2)

Application Number Title Priority Date Filing Date
GB6772/49A Expired GB651507A (en) 1946-05-09 1946-11-22 Improvement in x-ray tubes
GB34709/46A Expired GB651455A (en) 1946-05-09 1946-11-22 Improvement in x-ray tubes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB34709/46A Expired GB651455A (en) 1946-05-09 1946-11-22 Improvement in x-ray tubes

Country Status (7)

Country Link
US (1) US2597817A (en)
BE (1) BE469098A (en)
CH (1) CH261755A (en)
FR (2) FR944917A (en)
GB (2) GB651507A (en)
NL (1) NL69809C (en)
SE (1) SE122892C1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149115B (en) * 1959-06-11 1963-05-22 Hilger & Watts Ltd Fine focus x-ray tube
US3303372A (en) * 1964-08-20 1967-02-07 Dunlee Corp X-ray generator with a knife edged cold cathode emitter

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103591A (en) * 1963-09-10 Radiographic systems and method
DE931304C (en) * 1952-05-24 1955-08-04 Siemens Reiniger Werke Ag Electric discharge tubes with electrode straightening member
US2866113A (en) * 1952-10-07 1958-12-23 Cosslett Vernon Ellis Fine focus x-ray tubes
DE1027332B (en) * 1953-08-31 1958-04-03 Siemens Ag Metal-glass fusion for electrical discharge vessels, such as converter vessels or the like.
DE1097041B (en) * 1956-09-19 1961-01-12 Emi Ltd Adjustment device for centering a cathode of an electrical discharge arrangement for the highest frequencies
CH355225A (en) * 1958-01-22 1961-06-30 Foerderung Forschung Gmbh Method and device for controlling and correcting the position of the focal spot generated by a cathode ray on the anti-cathode of an X-ray tube
GB872579A (en) * 1958-10-15 1961-07-12 Ass Elect Ind Improvements relating to electron gun assemblies
US3179832A (en) * 1960-01-12 1965-04-20 Field Emission Corp Temperature enhanced field emission x-ray tube
DE3151229A1 (en) * 1981-12-23 1983-06-30 Siemens AG, 1000 Berlin und 8000 München Method and device for optimising the emission of an X-ray tube
DK147778C (en) * 1981-12-29 1985-05-20 Andrex Radiation Prod As ROENTGENSTRAALEGENERATOR
US4698835A (en) * 1984-05-31 1987-10-06 Kabushiki Kaisha Toshiba X-ray tube apparatus
US4868842A (en) * 1987-03-19 1989-09-19 Siemens Medical Systems, Inc. Cathode cup improvement
US6356619B1 (en) * 2000-06-02 2002-03-12 General Electric Company Varying x-ray tube focal spot dimensions to normalize impact temperature
US10068741B2 (en) * 2014-12-25 2018-09-04 Meidensha Corporation Field emission device and reforming treatment method
DE102015220754B3 (en) * 2015-10-23 2017-02-09 Siemens Healthcare Gmbh Method and measuring device for determining the electrode spacing of x-ray tubes
EP3696845A1 (en) * 2019-02-12 2020-08-19 Malvern Panalytical B.V. X-ray tube and x-ray analysis system

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1310714A (en) * 1919-07-22 X-ray tube
US793112A (en) * 1903-10-06 1905-06-27 Rome V Wagner Vacuum-tube.
US1174044A (en) * 1915-05-05 1916-03-07 Elof Benson X-ray apparatus.
DE390479C (en) * 1919-12-12 1924-02-19 Julius Edgar Lilienfeld Dr High vacuum pipes, in particular Roentgen pipes, valve pipes, transmitter pipes or reinforcement pipes
DE586817C (en) * 1930-12-11 1933-10-26 Radiologie Akt Ges Method for regulating the focal point for X-ray tubes by changing the emitting glow cathode surface
GB419727A (en) * 1932-04-22 1934-11-19 Loewe Opta Gmbh A braun tube for oscillographic and television purposes
US2130020A (en) * 1934-03-13 1938-09-13 Harry B Mceuen Cathode filament control for x-ray tubes
US2157718A (en) * 1935-02-26 1939-05-09 Mutscheller Arthur X-ray tube
FR818476A (en) * 1936-06-03 1937-09-27 Radiologie Cie Gle Improvements to X-ray bulbs
GB495707A (en) * 1937-04-17 1938-11-17 Frederick Hermes Nicoll Improvements in or relating to focussing systems for use in electric discharge tubes
NL68166C (en) * 1939-12-02
BE475842A (en) * 1942-04-25
US2350269A (en) * 1942-06-15 1944-05-30 Gen Electric X Ray Corp X-ray tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149115B (en) * 1959-06-11 1963-05-22 Hilger & Watts Ltd Fine focus x-ray tube
US3303372A (en) * 1964-08-20 1967-02-07 Dunlee Corp X-ray generator with a knife edged cold cathode emitter

Also Published As

Publication number Publication date
BE469098A (en)
US2597817A (en) 1952-05-20
FR56195E (en) 1952-09-18
SE122892C1 (en) 1948-10-05
FR944917A (en) 1949-04-20
CH261755A (en) 1949-05-31
NL69809C (en)
GB651455A (en) 1951-04-04

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