GB444788A - Improvements in roentgen ray apparatus - Google Patents

Improvements in roentgen ray apparatus

Info

Publication number
GB444788A
GB444788A GB23278/35A GB2327835A GB444788A GB 444788 A GB444788 A GB 444788A GB 23278/35 A GB23278/35 A GB 23278/35A GB 2327835 A GB2327835 A GB 2327835A GB 444788 A GB444788 A GB 444788A
Authority
GB
United Kingdom
Prior art keywords
tube
focusing
target
coils
rays
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
GB23278/35A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB444788A publication Critical patent/GB444788A/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
    • H01J35/32—Tubes wherein the X-rays are produced at or near the end of the tube or a part thereof which tube or part has a small cross-section to facilitate introduction into a small hole or cavity
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/52—Target size or shape; Direction of electron beam, e.g. in tubes with one anode and more than one cathode

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

444,788. R÷ntgenray apparatus. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Aug. 19, 1935, No. 23278. Convention date, Oct. 19, 1934. [Class 39 (i)] [See also Group XX] A projecting anode tube 14 on a R÷ntgen-ray tube suitable for examining narrow, hollow work-pieces carries the target 16 at its free end and also carries coils 17 or other focusing devices, and means such as a rheostat 18 enables regulation of the focusing effect and so the size of the focal spot on the target 16. The coils 17 may be adjustable, or the tube 14 flexible, and moved to move the focal spot over the target 16. The coils 17 and tube 14 may both be flexible, or the tube 14 may be curved, for introduction into curved work-pieces. X-rays emerge transversely through a thin part of the side wall of the tube 14 ; rays not emerging transversely are intercepted by a slotted screen moved with the tube relatively to the work-piece. The coils 17 may be replaced by electrodes forming focusing lenses. The X-ray tube is mounted by a ball-joint in the wall of a metal casing with the tube 14 projecting and adjustable in position. The casing contains a Villard supply circuit including a condenser and rectifier. To regulate the focusing, individual focusing members may be switched off or reversed. The focusing may be varied with the potential applied to the X-ray tube, as by coupling together mechanically or electrically the devices for regulating the focusing and the tube potential or by feeding the focusing devices from the primary or secondary of the transformer supplying the tube. When the tube is fed with pulsating current, the electrons may be concentrated only when the potential is above a certain value to reduce heating of the target by the generation of soft X-rays at lower potentials ; the focusing devices are then controlled by a synchronous switch or fed from the tube potential through a choking coil with a saturated core, and shutters are arranged inside the tube 14 to intercept cathode rays not proceeding to the focal spot. These shutters and the target end of the tube 14 may be cooled. The tube current may be varied with the focusing by coupling a regulator for the cathode heating current with the focusing regulator.
GB23278/35A 1934-10-20 1935-08-19 Improvements in roentgen ray apparatus Expired GB444788A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES115800D DE643827C (en) 1934-10-20 1934-10-20 X-ray facility for the examination of workpieces

Publications (1)

Publication Number Publication Date
GB444788A true GB444788A (en) 1936-03-27

Family

ID=7533702

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23278/35A Expired GB444788A (en) 1934-10-20 1935-08-19 Improvements in roentgen ray apparatus

Country Status (4)

Country Link
DE (1) DE643827C (en)
FR (1) FR796918A (en)
GB (1) GB444788A (en)
NL (1) NL42373C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374355A (en) * 1946-02-21 1968-03-19 Atomic Energy Commission Usa Magnetic focusing of x-ray tubes and system for operating

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE950666C (en) * 1939-10-18 1956-10-11 Aeg X-ray tubes with continuously changeable focal spot diameter
DE887879C (en) * 1940-11-23 1953-08-27 Messerschmitt Boelkow Blohm Device for the roentgenographic examination of work pieces interspersed with cavities
DE879744C (en) * 1941-05-29 1953-06-15 Siemens Reiniger Werke Ag X-ray tubes with a controllable collecting coil attached near the anode for setting the size of the focal spot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374355A (en) * 1946-02-21 1968-03-19 Atomic Energy Commission Usa Magnetic focusing of x-ray tubes and system for operating

Also Published As

Publication number Publication date
DE643827C (en) 1937-04-17
NL42373C (en) 1938-01-15
FR796918A (en) 1936-04-17

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