US2761992A - Electrical discharge tube - Google Patents

Electrical discharge tube Download PDF

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Publication number
US2761992A
US2761992A US240947A US24094751A US2761992A US 2761992 A US2761992 A US 2761992A US 240947 A US240947 A US 240947A US 24094751 A US24094751 A US 24094751A US 2761992 A US2761992 A US 2761992A
Authority
US
United States
Prior art keywords
metallic
envelope
tube
discharge tube
electrical discharge
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
US240947A
Other languages
English (en)
Inventor
Fenner Eckhard
Schmidt Adolf
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 Reiniger Werke AG
Original Assignee
Siemens Reiniger Werke 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 Reiniger Werke AG filed Critical Siemens Reiniger Werke AG
Application granted granted Critical
Publication of US2761992A publication Critical patent/US2761992A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
    • H01J35/26—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof by rotation of the anode or anticathode

Definitions

  • each of several electrodes at a different point of the tube envelope, which may be a glass envelope.
  • the cathode system may be secured on the so-called cathode extension of the envelope, and the anode system may be secured on the anode extension thereof.
  • Another disadvantage resides in difficulties attending the cooling of the electrodes.
  • the invention overcomes these diiculties by securing at least one of the electrodes on the outside wall of a tubular metallic member made of chrome iron, Kovar or another metal, which fuses well with the glass envelope and forms part of the envelope of the tube, such member extending axially inwardly of the tube from a reentrant portion of the envelope, and providing on the inside of such member fastening or holding means such, for example, as a thread, a bayonet joint or the like. A suitable tool may then be used to engage the. fastening or holding means for the purpose of facilitating the positional adjustment of the corresponding electrode.
  • the tubular metallic member provides for a better cooling than the glass envelope wall, which is of considerable importance during the production of the tube as well as during its operation.
  • the fastening or holding means which is disposed on the inside of the metallic member, may be provided with auxiliary cooling means, e. g., with a cooling body or with suitable inlet and outlet means for a cooling medium.
  • the working of metals which are adapted for fusing with glass, is relatively difficult.
  • the invention therefore provides, at least on the inside of the tubular metallic member, an element of a metal which is easily worked, e. g., an iron element, and provides on the latter the fastening means.
  • numeral 1 indicates the envelope of the tube.
  • Numeral 2 is the anode disk of the rotary anode system. All other parts of the anode system have been omitted to avoid encumbering the drawing.
  • the cathode system comprises the cathode disk having the parts 3 and 4 and the lament 5 which is surrounded by the focusing means 6.
  • the cathode disk parts 3 and 4 are carried by the cylindrical member 7.
  • This cylindrical member may in known structures be secured on the inwardly directed reentrant envelope extension 9.
  • the member '7 is removably secured, e.
  • annular, ringlike iron member 8 which in turn is held on the outside wall of the tubular metallic member 1t).
  • the latter may be made, e. g., of chrome iron, and one of its ends is fused into the reentrant envelope portion 9.
  • the tubular member 10 thus forms part of the envelope of the tube.
  • a metallic ring e. g., an iron ring 11, which is provided with fastening or holding means, for example, with an interior thread.
  • ri ⁇ he ringlike members 8 and 11 are permanently connected with the tubular member 10 in good heat-conducting relationship therewith, e. g., by brazing.
  • the portion of the envelope carrying the glass seal 12 seals the other end of the tubular member 10 in vacuum tight manner.
  • the current conductors 13 for the filament 5 extend through the glass seal 12.
  • a desired and suitable tube e. g., a metal tube (not shown), may be threaded into the ring 11 for adjusting the position of the electrode during the assembly of the structure.
  • a metal tube may also be used for firmly holding the structure during the mounting thereof in a housing or in assembly with other parts.
  • means may be secured to the ringlike member 11 for circulating a cooling medium through the structure during certain manufacturing phases as well as during the operation thereof.
  • an electric discharge tube comprising an envelope having a rst glass portion forming at one end thereof a tubular axially inwardly extending reentrant portion and having a metallic tubular mounting member fused at one of its ends to said reentrant portion and forming a continuation of said reentrant portion, said metallic tubular mounting member being made of a metal which fuses easily with glass but which is relatively difficult to machine, and having a second glass portion sealed to the other end of said metallic tubular mounting member and current conductors extending through said second glass portion; a fastening device comprising a first metallic ringlike member carried by said metallic tubular mounting member on the outside thereof and a second metallic ringlike member carried by said metallic tubular mounting member on the inside thereof, each said first and said second rinklike member being substantially permanently secured to said metallic tubular mounting member by being fused thereto and said ringlike members being made of a metal which is adapted to be relatively easily machined, a cylindrical holder secured to said first metallic ringlike member and

Landscapes

  • X-Ray Techniques (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
US240947A 1950-08-19 1951-08-08 Electrical discharge tube Expired - Lifetime US2761992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE291654X 1950-08-19

Publications (1)

Publication Number Publication Date
US2761992A true US2761992A (en) 1956-09-04

Family

ID=6069128

Family Applications (1)

Application Number Title Priority Date Filing Date
US240947A Expired - Lifetime US2761992A (en) 1950-08-19 1951-08-08 Electrical discharge tube

Country Status (4)

Country Link
US (1) US2761992A (de)
CH (1) CH291654A (de)
FR (1) FR1040001A (de)
GB (1) GB704362A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113233A (en) * 1961-06-09 1963-12-03 Dunlee Corp X-ray tube with reverse position focal spot

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1757233A (en) * 1923-10-17 1930-05-06 Rca Corp Discharge tube
US1824755A (en) * 1925-01-28 1931-09-22 Philips Nv Electric discharge tube
US1932635A (en) * 1926-04-24 1933-10-31 Siemens Ag Electrode connection for discharge tubes
US2260927A (en) * 1940-09-09 1941-10-28 Gen Electric X Ray Corp Getter
US2277440A (en) * 1941-01-10 1942-03-24 Westinghouse Electric & Mfg Co Glass-metal casing
US2290226A (en) * 1940-12-19 1942-07-21 Mond Jesse W M Du X-ray generating device
US2350642A (en) * 1939-10-14 1944-06-06 Schwarzer Kurt Roentgen tube with anode turning about its longitudinal axis
US2482275A (en) * 1945-11-26 1949-09-20 Machlett Lab Inc Electrical discharge device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1757233A (en) * 1923-10-17 1930-05-06 Rca Corp Discharge tube
US1824755A (en) * 1925-01-28 1931-09-22 Philips Nv Electric discharge tube
US1932635A (en) * 1926-04-24 1933-10-31 Siemens Ag Electrode connection for discharge tubes
US2350642A (en) * 1939-10-14 1944-06-06 Schwarzer Kurt Roentgen tube with anode turning about its longitudinal axis
US2260927A (en) * 1940-09-09 1941-10-28 Gen Electric X Ray Corp Getter
US2290226A (en) * 1940-12-19 1942-07-21 Mond Jesse W M Du X-ray generating device
US2277440A (en) * 1941-01-10 1942-03-24 Westinghouse Electric & Mfg Co Glass-metal casing
US2482275A (en) * 1945-11-26 1949-09-20 Machlett Lab Inc Electrical discharge device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113233A (en) * 1961-06-09 1963-12-03 Dunlee Corp X-ray tube with reverse position focal spot

Also Published As

Publication number Publication date
CH291654A (de) 1953-06-30
GB704362A (en) 1954-02-17
FR1040001A (fr) 1953-10-12

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