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GB211450A - Improvements in and relating to x-ray tubes - Google Patents

Improvements in and relating to x-ray tubes

Info

Publication number
GB211450A
GB211450A GB762/24A GB76224A GB211450A GB 211450 A GB211450 A GB 211450A GB 762/24 A GB762/24 A GB 762/24A GB 76224 A GB76224 A GB 76224A GB 211450 A GB211450 A GB 211450A
Authority
GB
United Kingdom
Prior art keywords
cathode
cathodes
rays
ray tubes
focussing device
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
GB762/24A
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.)
PHOENIX ROENTGENROEHRENFABRIKE
Original Assignee
PHOENIX ROENTGENROEHRENFABRIKE
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 PHOENIX ROENTGENROEHRENFABRIKE filed Critical PHOENIX ROENTGENROEHRENFABRIKE
Publication of GB211450A publication Critical patent/GB211450A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/06—Cathode assembly
    • H01J2235/068—Multi-cathode assembly

Landscapes

  • X-Ray Techniques (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

211,450. Ph÷nix R÷ntgenr÷hrenfabriken Akt.-Ges. Feb. 16, 1923, [Convention date]. R÷ntgen-ray tubes.-A high vacuum tube has two or more incandescent cathodes b, c, Fig. 1, regulatable independently so that the rays of each cathode may be concentrated upon areas of different size upon the anti-cathode a. The tube may be used for exact screen examination or for making photographical exposures, the cathode b being formed so that the rays directed by a focussing device k fall upon a small area, and the cathode c arranged so that the rays cover a large area of the anti-cathode. The cathodes may be supplied from separate transformers d, e, or from a single transformer provided with a switch for connecting either cathode. In the modification shown in Fig. 3 two or more spiral or helical cathodes m, n are mounted in a single focussing device o so that the rays from one cathode pass by those from the others. In another arrangement a single wire is divided into sections forming cathodes. connected independently.
GB762/24A 1923-02-16 1924-01-10 Improvements in and relating to x-ray tubes Expired GB211450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP45745D DE406067C (en) 1923-02-16 1923-02-16 Incandescent cathode x-ray tube with high vacuum

Publications (1)

Publication Number Publication Date
GB211450A true GB211450A (en) 1924-06-05

Family

ID=40020133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB762/24A Expired GB211450A (en) 1923-02-16 1924-01-10 Improvements in and relating to x-ray tubes

Country Status (3)

Country Link
US (1) US1610863A (en)
DE (1) DE406067C (en)
GB (1) GB211450A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760526C (en) * 1941-05-24 1954-04-22 Siemens Reiniger Werke Ag X-ray system for movement radiation
US2715682A (en) * 1945-02-03 1955-08-16 Ernest O Lawrence Ion source for calutrons
US3452232A (en) * 1966-06-30 1969-06-24 Tokyo Shibaura Electric Co Multiple-cathode x-ray triode tube
FR2415365A1 (en) * 1978-01-24 1979-08-17 Radiologie Cie Gle DEVICE FOR REDUCING THE DIVERGENCE OF THE USEFUL BEAM OF AN X-RAY TUBE, AND THUS EQUIPPED TUBE
FR2531571A1 (en) * 1982-08-06 1984-02-10 Thomson Csf X-RAY TUBE UNIVERSAL FOR STEREOGRAPHY
US4637040A (en) * 1983-07-28 1987-01-13 Elscint, Ltd. Plural source computerized tomography device with improved resolution
FR2589028B1 (en) * 1985-10-18 1987-11-20 Thomson Cgr X-RAY GENERATOR
EP0958844A3 (en) * 1998-05-15 2000-08-09 Siemens Aktiengesellschaft Magnetic stimulation device
DE19911081A1 (en) * 1999-03-12 2000-09-21 Siemens Ag X-ray tube, especially a rotating bulb tube for producing different selected focal spots, has a hybrid emitter with different concentric emitter surface regions operated individually or in groups
US6480572B2 (en) 2001-03-09 2002-11-12 Koninklijke Philips Electronics N.V. Dual filament, electrostatically controlled focal spot for x-ray tubes

Also Published As

Publication number Publication date
DE406067C (en) 1924-11-14
US1610863A (en) 1926-12-14

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