US1567012A - Electron-discharge apparatus - Google Patents

Electron-discharge apparatus Download PDF

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Publication number
US1567012A
US1567012A US556917A US55691722A US1567012A US 1567012 A US1567012 A US 1567012A US 556917 A US556917 A US 556917A US 55691722 A US55691722 A US 55691722A US 1567012 A US1567012 A US 1567012A
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US
United States
Prior art keywords
electron
ray
tank
tubes
potential
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
US556917A
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English (en)
Inventor
Pilon Hector Paul
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
Application granted granted Critical
Publication of US1567012A publication Critical patent/US1567012A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05G1/02—Constructional details
    • H05G1/04—Mounting the X-ray tube within a closed housing

Definitions

  • the present invention relates to electronic devices, as for example, X-ray tubes, and its object is to obviate conditions tending to cause damage or destruction of these devices when at high voltages.
  • Certain advantages may be obtained by immersing electrical devices in an insulating solid, paste, or liquid. Twofold advantages are thereby realized.
  • Cooling is more efficient, especially if the insulation is liquid and therefore greater amounts of power can be absorbed than in air.
  • the present invention has for its object the provision of electron discharge devices operable at high potentials without risk of puncture by sparks passing through the Wa a of ill? enclosing env lope
  • My invention is embodied in an apparatus comprising an electron discharge device operated in an insulating liquid or paste and provided with means for modifying the electrostatic field about this device.
  • FIG. 1 a vertical section of a preferred embodiment of my invention in an X-ray apparatus and in Fig. 2 I have shown a modification.
  • Fig. 1 shows a sealed tank 1 containing oil or other suitable insulating liquid 2 in which is immersed an X-ray tube 3, a suitable window 4 consisting of hard rubber, bakelite or the like for the transmission of X-rays.
  • the tube 3 provides a highly evacuated space in which an electron discharge is produced between a cathode 5 adapted to emit electrons from a heated filament (not shown) and an anode 6.
  • the conductors 7 8 supply current to the X-ray tube from a source of current (not shown), preferably direct current. These conductors preferably are surrounded by insulating sheaths 9, 10.
  • the cover 11 of the tank may consist of insulating material as shown in Fig. 1 or of metal as indicated in Fig. 2.
  • Surrounding the X- ray tube 3 is a cylindrical conductive body 12, which preferably is provided with a window as indicated, although the X-rays can be transmitted directly through the metal.
  • the conductor 12 is connected by a conductor 14 to the slider 15 of a potentiometer 16 conductively mounted between the conductors 7, 8.
  • the conductor 14 can be brought by moving the slider to a suitable potential intermediate the potential between the terminals of the X-ray tube. In this way the electric field inside and outside of i an electron discharge tube may be equalized to prevent puncture.
  • the tank 1 may be connected to a point of intermediate potential, for example, the potentiometer 16, in order to modify the electric field about the electron discharge device.
  • the tank 1 may be grounded as indicated in Fig. 1 or surrounded by a grounded cage.
  • X-ray tube by ay of example as an electron discharge device, but I wish it to be understood that the advantages of my invention are not limited to Xray tubes. It extends to other forms of electron discharge devices, operable at high voltage.
  • these devices may be coated .to advantage with an insulating body, such as a resin, applied by varnishing the surface with an alcoholic solution of the resin, for example, shellac.
  • an insulating body such as a resin
  • varnishing the surface with an alcoholic solution of the resin for example, shellac.
  • This insulating coating modifies the electric ifield .created about the tube in the tank and decreases the risk of puncture of the glass Wall of the tube.
  • An electron discharge apparatus com prising the combination of a tank, an electron discharge device mounted therein, means for operating the same, a conductor spaced away from said tank and surrounding said device 311d means for charging said conductor to an electrostatic potential intermediate the potential of said operating means.
  • An X-ray apparatus comprising the combination of a tank, an X-ray bulb mounted therein, a body of insulating liquid surrounding said bulb, a conductive body surrounding said bulb in contact With said liquid, and means for charging said conductive body to an electrostatic potential.
  • An X-ray apparatus comprising the combination of a tank, a glass enclosed X- ray device having a surface coating of resinous material and being located in said tank, a body of oil surrounding said device, conductive body Within said tank spaced about said X-ray device, insulating means for supporting said body, current supply con'ductors connected to said device, and means for charging said body to an electrostatic potential which is intermediate the potential of said supply conductors.

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  • X-Ray Techniques (AREA)
  • Radiation-Therapy Devices (AREA)
US556917A 1921-05-24 1922-04-27 Electron-discharge apparatus Expired - Lifetime US1567012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR561723T 1921-05-24

Publications (1)

Publication Number Publication Date
US1567012A true US1567012A (en) 1925-12-22

Family

ID=8943806

Family Applications (1)

Application Number Title Priority Date Filing Date
US556917A Expired - Lifetime US1567012A (en) 1921-05-24 1922-04-27 Electron-discharge apparatus

Country Status (4)

Country Link
US (1) US1567012A (enrdf_load_stackoverflow)
DE (1) DE487663C (enrdf_load_stackoverflow)
FR (1) FR561723A (enrdf_load_stackoverflow)
GB (1) GB180643A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334153A (en) * 1980-09-29 1982-06-08 General Electric Company X-Ray tube grid bias supply
US20060008055A1 (en) * 2004-07-09 2006-01-12 Sundaram Senthil K insulation methods and arrangements for an X-ray generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334153A (en) * 1980-09-29 1982-06-08 General Electric Company X-Ray tube grid bias supply
US20060008055A1 (en) * 2004-07-09 2006-01-12 Sundaram Senthil K insulation methods and arrangements for an X-ray generator
US7430278B2 (en) * 2004-07-09 2008-09-30 General Electric Company Insulation methods and arrangements for an X-ray generator

Also Published As

Publication number Publication date
FR561723A (fr) 1923-10-26
GB180643A (enrdf_load_stackoverflow) 1923-02-22
DE487663C (de) 1929-12-11

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