GB252120A - Improvements in x-ray apparatus - Google Patents

Improvements in x-ray apparatus

Info

Publication number
GB252120A
GB252120A GB2405/26A GB240526A GB252120A GB 252120 A GB252120 A GB 252120A GB 2405/26 A GB2405/26 A GB 2405/26A GB 240526 A GB240526 A GB 240526A GB 252120 A GB252120 A GB 252120A
Authority
GB
United Kingdom
Prior art keywords
cathode
resistance
tube
focussing
ray tube
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
GB2405/26A
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.)
CHF Mueller AG
Original Assignee
CHF Mueller 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 CHF Mueller AG filed Critical CHF Mueller AG
Publication of GB252120A publication Critical patent/GB252120A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)

Abstract

252,120. M³ller, C. H. F. (Firm of]. May 18, 1925, [Convention date]. R÷ntgen-ray tubes.-An incandescent-cathode tube has a focussing member connected to a control device which varies the electric or magnetic field between the focussing member and cathode so that the focus automatically expands when the current through the tube increases. In one arrangement, the secondary winding of a supply transformer 1 is connected directly to the anode 2 of the tube and through a resistance 3 to the cathode 4. The focussing-member 6 is connected to the anode 10 of a thermionic valve, of which the filament cathode 8 is connected to the cathode of the X-ray tube, while the grid 9 is connected to the end of the resistance 3 remote from the X-ray tube. In another arrangement the resistance 3 is replaced by the primary winding of a transformer, the secondary of which is shunted by a resistance and is connected to the cathode and focussing member of the X-ray tube.
GB2405/26A 1925-05-18 1926-01-27 Improvements in x-ray apparatus Expired GB252120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM89745D DE488810C (en) 1925-05-18 1925-05-18 Device for regulating the size of the focal spot in incandescent cathode roentgen tubes

Publications (1)

Publication Number Publication Date
GB252120A true GB252120A (en) 1926-08-12

Family

ID=7321374

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2405/26A Expired GB252120A (en) 1925-05-18 1926-01-27 Improvements in x-ray apparatus

Country Status (3)

Country Link
DE (1) DE488810C (en)
GB (1) GB252120A (en)
NL (1) NL18966C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518539A (en) * 1944-09-27 1950-08-15 Picker X Ray Corp Waite Mfg Filament current stabilizer

Families Citing this family (1)

* 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518539A (en) * 1944-09-27 1950-08-15 Picker X Ray Corp Waite Mfg Filament current stabilizer

Also Published As

Publication number Publication date
DE488810C (en) 1930-01-09
NL18966C (en) 1928-11-15

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