GB240238A - Improvements in or relating to alternating current systems - Google Patents

Improvements in or relating to alternating current systems

Info

Publication number
GB240238A
GB240238A GB15462/24A GB1546224A GB240238A GB 240238 A GB240238 A GB 240238A GB 15462/24 A GB15462/24 A GB 15462/24A GB 1546224 A GB1546224 A GB 1546224A GB 240238 A GB240238 A GB 240238A
Authority
GB
United Kingdom
Prior art keywords
current
load
series
fluctuations
transformer
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
GB15462/24A
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.)
GEORGE ALBERT STARTWEATHER
Original Assignee
GEORGE ALBERT STARTWEATHER
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 GEORGE ALBERT STARTWEATHER filed Critical GEORGE ALBERT STARTWEATHER
Publication of GB240238A publication Critical patent/GB240238A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05GX-RAY TECHNIQUE
    • H05G1/00X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08Electrical details
    • H05G1/26Measuring, controlling or protecting
    • H05G1/30Controlling
    • H05G1/34Anode current, heater current or heater voltage of X-ray tube

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)

Abstract

240,238. Jackson, W. J. Mellersh-, (Starkweather, G. A.). June 26, 1924. Thermionic valve circuits. - In an alternating current system having means independent of but for supplying current to a load, in such a way that the current remains substantially constant for a given potential independent of fluctuations in the supply voltage, there is provided additional means in combination with a resistance in series with the load for selecting one of a number of optional current values and at the same time for causing each of the values when selected to remain constant notwithstanding fluctuations in the supply voltage. In the form shown in Fig. 1 and applied to an X-ray tube 14, the supply 11, 12 is con. nected in series with the primaries 18, 20 of a main and an auxiliary bucking transformer 15, 16 respectively, the secondaries 19, 22 of which are in series with the filament 13. The transformer 15 is saturated at a voltage somewhat below normal and the transformer 16 has air-gaps 23, so that, for one particular value of filament current, fluctuations of the supply voltage will be neutra.- lized in the secondary circuit. To effect this neutralization at other values of filament current, a variable resistor 30 and inductor 31 are placed in series in the load circuit, and their proportions are so chosen that the current determined by the position of the regulating arm 32 is unaffected by changes of supply voltage. The Specification contains curves in illustration of this. The insulator transformer 26 serves to protect the supply from the high potential system 28, 29. Since the transformers neutralize the fluctuations for one value of load current, then by utilizing the arrangement shown in Fig. 5 and comprising a resistor 36 in series with the load and a resistor 37 in parallel, the load on the secondaries can be kept at this particular value and the filament current can be varied if the proportions of the resistors are suitably chosen.
GB15462/24A 1921-09-26 1924-06-26 Improvements in or relating to alternating current systems Expired GB240238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US503369A US1499551A (en) 1921-09-26 1921-09-26 Alternating-current system

Publications (1)

Publication Number Publication Date
GB240238A true GB240238A (en) 1925-09-28

Family

ID=24001797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15462/24A Expired GB240238A (en) 1921-09-26 1924-06-26 Improvements in or relating to alternating current systems

Country Status (3)

Country Link
US (1) US1499551A (en)
FR (1) FR584964A (en)
GB (1) GB240238A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845590A (en) * 1955-04-18 1958-07-29 Westinghouse Electric Corp Voltage reference devices

Also Published As

Publication number Publication date
US1499551A (en) 1924-07-01
FR584964A (en) 1925-02-19

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