US2664516A - Electrical high-vacuum discharge tube - Google Patents

Electrical high-vacuum discharge tube Download PDF

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Publication number
US2664516A
US2664516A US238114A US23811451A US2664516A US 2664516 A US2664516 A US 2664516A US 238114 A US238114 A US 238114A US 23811451 A US23811451 A US 23811451A US 2664516 A US2664516 A US 2664516A
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US
United States
Prior art keywords
potlike
envelope
tube
rotor
extension
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
US238114A
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English (en)
Inventor
Zimmer Theodor
Fenner Eckhard
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Individual
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Individual
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Filing date
Publication date
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Publication of US2664516A publication Critical patent/US2664516A/en
Anticipated expiration legal-status Critical
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    • 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
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/101—Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
    • 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

Definitions

  • This invention is concerned with an electrical high-vacuum discharge tube having at least one large electrode which is secured to the tube en velope, especially the anode of a rotary anode X-ray tube, and has particularly to do with the mounting or securing of such an electrode.
  • the electrode oxidizes incident to this reheating and again takes up gases from the air. These gases escape from the metallic parts in the presence of the high temperatures occurring during the operation of the tube, and therefore have a detrimental effect on the vacuum thereof.
  • the invention avoids these drawbacks by the provision of a preferably pot-shaped securing or mounting member which is fused to the tube envelope and to which the metallic electrode can be fastened by screw, clamp or bayonet joint means or the like without necessitating heating thereof.
  • the potlike member may be made of metal and seals one end of the tubular glass wall of the envelope. It can thus easily be cleaned and again degassed after fusing to the envelope glass wall.
  • An auxiliary glass cylinder may be introduced into the corresponding tubular glass extension of the tube envelope during such repeated degassing of the potlike member, for catching and conducting to the outside the liberated gases, thereby avoiding detrimental effects on the inner wall of the glass extension.
  • the metallic electrode which has been separately degassed, can then be directly fastened, without heating, to the potlike member which has been fused to the envelope extension.
  • Tubes made in accordance with the invention secure to a very high degree the maintenance of the high vacuum during the operation thereof.
  • Fig. 1 shows in diagrammatic, partly elevational and partly sectional representation an ex ample of a rotary anode X-ray tube embodying the features of the invention
  • FIG. 2 illustrates in similar representation another example of the invention.
  • the rotor of the rotary anode system comprises the copper cylinder 3 from which extends the pin 4 carrying the anode disk 5.
  • the copper cylinder is, by means of the iron cylinder 6 (Fig. 1), supported on the journal (not shown) of the rotor carrier.
  • this rotor carrier is the metal tube '2
  • Fig. 2 it is the metallic member l3 having a boltlike threaded extension l4 and a flange is.
  • the rotor carrier 1 is in Fig. 1 secured in the potlike metallic mounting or securing member 9,, and in Fig. 2 it is secured in the potlike member i5, These potlike members are in each case in vacuumtight manner connected with the of the glass envelope by means of the metallic ring H which is fused to the envelope extension wall.
  • the rotor carrier 1 is fastened or clamped in the metallic pot by the annular groove 8 formed by the pot wall portion it.
  • the threaded boltlike extension M which is in threaded engagement with the inside of the metallic pot 15.
  • the rotor and rotor carrier form in both embodiments a unit which is, prior to mounting in the tube, cleaned and degassed and is then mechanically secured in position without heating, by attachment to the corresponding potlike securing and sealing member which is fused to the envelope wall of the tube, as described.
  • the copper cylinder 3 of the structure shown in Fig. 2 is provided with a bore ll through which a suitable key tool is inserted incident to screwing the rotor carrier l3 into the pot [5, the key engaging a bore or depression in the carrier I3, whereby the rotor is temporarily coupled with its carrier so that the screwing of the extension i l into the pot 55 can be accomplished by rotation of the rotor.
  • the rotor carrier I3 is in mounted position secured against angular displacement, by means of the stud screw l8 which engages the carrier flange 18.
  • the screw I6 is accessible through the pump extension l9.
  • Electrical high-vacuum discharge tube having an envelope and a rotary electrode forming a unit including a rotor and a carrier for said rotor, and a device for disposing said electrode unit in said tube, said device comprising a mounting member extending from said carrier, a potlike receiving member which is bonded to said envelope at one end thereof prior to disposing said electrode unit therein, said potlike receiving member forming part of the envelope wall at the corresponding end thereof and forming a recess for receiving said mounting memher, and means for mechanically fixedly securing said mounting member in its position in said potlike receiving member.
  • said potlike receiving member is a metallic rotor carrier scope and member carrying an annular radially extending flange, said flange being bonded to said envelope.
  • said mounting member is a threaded boltlilre element extending axially from said rotor carrier for threaded engagement with the recess in said potlike receiving member, an aperture being formed in said rotor for projecting a tool therethrough, during the assembly of said mounting member with said potlike receiving member, for engagement with a recess formed insaid mounting member, to facilitate threading of said boltlike mounting member into said potlike receiving member.
  • said potlike receiving member is a tubular metallic member bonded to the envelope of said tube at the corresponding end thereof and extending axially therefrom, a tubular extension projecting from said carrier axially thereof constituting said mounting member, said extension being received in said potlike receiving member and being fastened therein in clamping engagement therewith.

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  • X-Ray Techniques (AREA)
US238114A 1950-08-19 1951-07-23 Electrical high-vacuum discharge tube Expired - Lifetime US2664516A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE291653X 1950-08-19

Publications (1)

Publication Number Publication Date
US2664516A true US2664516A (en) 1953-12-29

Family

ID=6069122

Family Applications (1)

Application Number Title Priority Date Filing Date
US238114A Expired - Lifetime US2664516A (en) 1950-08-19 1951-07-23 Electrical high-vacuum discharge tube

Country Status (6)

Country Link
US (1) US2664516A (it)
CH (1) CH291653A (it)
FR (1) FR1039955A (it)
GB (1) GB720540A (it)
IT (1) IT481616A (it)
SE (1) SE147693C1 (it)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1643453A (en) * 1924-11-20 1927-09-27 Philips Nv X-ray tube
US2230857A (en) * 1939-05-06 1941-02-04 Gen Electric X Ray Corp Bearing
US2274865A (en) * 1940-02-03 1942-03-03 Machlett Lab Inc X-ray tube
US2298335A (en) * 1940-09-10 1942-10-13 Gen Electric X Ray Corp Multiple target anode
US2427203A (en) * 1945-05-14 1947-09-09 Farnsworth Television & Radio Bearing for vacuum tube work

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1643453A (en) * 1924-11-20 1927-09-27 Philips Nv X-ray tube
US2230857A (en) * 1939-05-06 1941-02-04 Gen Electric X Ray Corp Bearing
US2274865A (en) * 1940-02-03 1942-03-03 Machlett Lab Inc X-ray tube
US2298335A (en) * 1940-09-10 1942-10-13 Gen Electric X Ray Corp Multiple target anode
US2427203A (en) * 1945-05-14 1947-09-09 Farnsworth Television & Radio Bearing for vacuum tube work

Also Published As

Publication number Publication date
CH291653A (de) 1953-06-30
SE147693C1 (it) 1954-11-16
GB720540A (en) 1954-12-22
IT481616A (it)
FR1039955A (fr) 1953-10-12

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