US1890330A - Apparatus for and method of operating rectifying load devices - Google Patents

Apparatus for and method of operating rectifying load devices Download PDF

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Publication number
US1890330A
US1890330A US426427A US42642730A US1890330A US 1890330 A US1890330 A US 1890330A US 426427 A US426427 A US 426427A US 42642730 A US42642730 A US 42642730A US 1890330 A US1890330 A US 1890330A
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US
United States
Prior art keywords
current
transformer
primary
voltage
circuit
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 - Lifetime
Application number
US426427A
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English (en)
Inventor
William K Kearsley
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US426427A priority Critical patent/US1890330A/en
Priority to FR39730D priority patent/FR39730E/fr
Priority to GB3832/31A priority patent/GB370549A/en
Application granted granted Critical
Publication of US1890330A publication Critical patent/US1890330A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H05G1/10—Power supply arrangements for feeding the X-ray tube
    • H05G1/14—Power supply arrangements for feeding the X-ray tube with single-phase low-frequency AC also when a rectifier element is in series with the X-ray tube
    • H05G1/16—Reducing the peak-inverse voltage

Definitions

  • the present invention relates to alternating current, apparatus containing a transformer and a load devlce, such as an X-ray tube,
  • a unilateral load 1'5 device which, is operatively connected toan electromagnetic supply source, such. as a transformer, is combined with means whereby the flow of magnetizing current in the primary circuit of such-source is prevented 320 during the half wave intervals'when no 'current is flowing through the load device be cause of its rectifying character.
  • an electromagnetic supply source such. as a transformer
  • the system described comprises a transformer having as usual a magnetic core 1, a primary circuit 2and a secondary circuit 8.
  • the transformer illusl '40 trated is of the step-up type, that is, has a low voltage primary and a high voltage secondary, having agreaten number of turns than the primary.
  • an X-raytube 6 Connected to the secondary conductors 4,5 is an X-raytube 6 ofthe well known form known as the Coolidge tube.
  • such an X ray tube comprises a highly evacuated bulb in which are sealed electrodes comprising a cathode '7 and anode 8.
  • the cathode comprises a filament (not shown) connected by conductors 9, 10 to a source of current, whereby the filament may i i be heated tofincandescence, as representedbyl the low voltage secondary of a transformer. 11.
  • the filamentary cathode issurrounded by afocusing cup 12 whereby,.a'thermionic I discharge from the filament is caused to be, focused and directed upon a target of' refrac tory metal 13 which is embedded in the'anode- 8.
  • the main portion of the anode 8 and the anode stem 14 consists of a' metal of high heat conductivity, such as-copper, whereby theheat maybe carried away to an external radiator from thetarget 13 during operation;
  • An X-ray' tube such as described'is conductive to current only incne direction or polarity
  • a rectifier 1 18 is provided in the primary circuitof the transformer- 1.
  • the particular rectifier illustrated in Fig. 1 is of the thermionic type and comprises'a sealed envelope containing a cath- I code 19, which is adapted to be maintained atv incandenscence bya separatefiow of current therethrough, and'thus being adapted to func- V tion as a source of electrons.
  • the anode 20 com'monly consists of a plate, ormass of metal which is adapted to remain relatively I "cool during the operation of the rectifier, that is, below'the temperature at which appreciable electron emission can occur.
  • a drop o f'mercury in the evacuated envelope is indicated at 27.
  • the primaries of both the cathode heating transformers 11 and 21 are I 'connected respectively by the conductors 22 and '23 to altern atinge current; supply I mains '24 24.
  • the anode 20 01 the rectifier lS is connected' to the supply conductor 16 ofthe transformer 1, the supply circuit for the transiformer l being completed through the conductor 25 to the mains 24, 2 1;
  • a hand oper ated switch for the .circuit 25, has been diagrammatically indicated at 26.
  • electrode 36 is negativelycharged with [respect to the cathode. Means for producing I thereby the; control electrode-36 is connected flowloccurs through the rectifier and the 'X ray tube is energizedas' above 'des'eribed.
  • An alternating current system comprising a transformer having primary and sec ondary circuits, a unilaterally conducting load, device in a secondary circuit, and valve means in a primary circuit constructed and connected to conduct current continuously in :said circuit during the half wave intervals of useful current flow in said load device and preventing flow of a magnetizing current in said primary circuit during the half wave intervals when said device is non-con- 2.
  • An X-ray system comprising a transformer, a rectifying X-ray' device connected to receive current from the secondary circuit of said transformer, and a rectifier in" the in a secondary circuit of said transformer,
  • a source of alternating current connected to and a gas ionization rectifier connected in said prlmary circuit to unmterruptedly conduct current during useful half wave intervals when said X-ray tube conducts current.
  • An X-ray system comprising an electric ary circuit, an X-raytube connected to said secondary c1rcu1t of said transformer, a ther- -m1onic rectifier connected series with the primary circult of said transformer to uninterruptedly transmit current during half wave intervals when said X-ray tube isop-

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • X-Ray Techniques (AREA)
US426427A 1930-02-06 1930-02-06 Apparatus for and method of operating rectifying load devices Expired - Lifetime US1890330A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US426427A US1890330A (en) 1930-02-06 1930-02-06 Apparatus for and method of operating rectifying load devices
FR39730D FR39730E (fr) 1930-02-06 1931-02-06 Perfectionnements aux moyens de régler le courant d'espace de tubes à décharge thermionique
GB3832/31A GB370549A (en) 1930-02-06 1931-02-06 Improvements in and relating to rectifying apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US426427A US1890330A (en) 1930-02-06 1930-02-06 Apparatus for and method of operating rectifying load devices

Publications (1)

Publication Number Publication Date
US1890330A true US1890330A (en) 1932-12-06

Family

ID=23690753

Family Applications (1)

Application Number Title Priority Date Filing Date
US426427A Expired - Lifetime US1890330A (en) 1930-02-06 1930-02-06 Apparatus for and method of operating rectifying load devices

Country Status (3)

Country Link
US (1) US1890330A (fr)
FR (1) FR39730E (fr)
GB (1) GB370549A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495122A (en) * 1947-07-10 1950-01-17 Ritter Co Inc Method of and apparatus for energizing self-rectifying loading devices
US3221167A (en) * 1963-11-26 1965-11-30 X Ray Mfg Corp Of America X-ray system with reduced inverse voltage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495122A (en) * 1947-07-10 1950-01-17 Ritter Co Inc Method of and apparatus for energizing self-rectifying loading devices
US3221167A (en) * 1963-11-26 1965-11-30 X Ray Mfg Corp Of America X-ray system with reduced inverse voltage

Also Published As

Publication number Publication date
FR39730E (fr) 1932-02-11
GB370549A (en) 1932-04-14

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