US1671953A - Process for making x-ray anodes - Google Patents

Process for making x-ray anodes Download PDF

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Publication number
US1671953A
US1671953A US206102A US20610227A US1671953A US 1671953 A US1671953 A US 1671953A US 206102 A US206102 A US 206102A US 20610227 A US20610227 A US 20610227A US 1671953 A US1671953 A US 1671953A
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United States
Prior art keywords
making
refractory material
mold
pressure
carbon
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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
US206102A
Inventor
Emery G Gilson
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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 US206102A priority Critical patent/US1671953A/en
Application granted granted Critical
Publication of US1671953A publication Critical patent/US1671953A/en
Priority to GB19802/28A priority patent/GB293864A/en
Priority to FR657755D priority patent/FR657755A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S76/00—Metal tools and implements, making
    • Y10S76/11—Tungsten and tungsten carbide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component

Definitions

  • the present invention relates to the manufaeture of electrodes and more particularly to the manufacture of tungsten anodes .for
  • X-ray tubes Heretofore, in the mannfae- 10 temperature of about .1400 C.
  • the bar is then reheated by an electric current, swaged into the desired shape, ground and swagedto a stem of molybdenum or other suitable material.
  • Fig. 3 is a perspective view of an X-ray anode constructed in accordance with the present process.
  • I have indicated at 1 the base plate of a press.
  • a stationary angular metal member 2 is bolted to the base plate while a movable metal memher 3 is mounted on plate 1 opposite member'- 2.
  • a pair of flat, water coo ed copper conductors 4 and 5 are mounted adjacent plates 2 and 3 respectively, and spaced therefrom *by insulators Sand 7.
  • An insulator 8 is inserted between plate 1 and the lower ends of member 3 and conductor 4, and a similar insulator 9 is inserted between plate 1 and the lower ends of conductor 5 and insulator 7.
  • a pair of carbon blocks 10 and 11,secured in any suitable manner to conductors 4 and 5, are adapted to supply current to a carbon mold 12 and to firmly clamp the mold in position on the press.
  • Mold 12 is substantially rectangular in cross section and is provided with'a circular opening 13 extending therethrough' in which slidable carbon members 14 and 15 are mounted.
  • the lower member 15 is-provided with a central opening 16 per end of the carbon member 15 and proe'ct a desired distance above that member.
  • a stem 18 which may be made from molybdenum or tungsten, extends through the openings 16 and 17, and is provided at its upper end with an enlarged por-- tion so that the stem may rest upon the up- In operation, the carbon member 15 is placed on the press so that its opening 16 registers with the opening 17 in the plate 1. Mold 12 is then placed over the'movable member 15 and the block 10 moved into contact with the mold 12 by suitable pressure means applied tothe movable plate 3.
  • a refractory powder such as tuhgsten, is then placed in the opening 13' in the mold 12 so as to completely surround and extend above the upper end of the rod 18.
  • the movable carbon member 14 is then inserted in mold 12 and a pressure of about 1000 pounds per square inch or more applied thereto by a plunger 19.
  • current is supplied to the mold and powdered refractory material through copper conductors 4 and 5 and carbon blocks 10 and 11.
  • the current employed should have a value sufficiently high to heat the tungsten powder-at least to its sintering -temperature'and preferably to a temperature of about 3000 C.
  • the simultaneous applitungsten provides a solid anode substantial-.
  • the anode and stem When removed from the mold, the anode and stem, may be polished'and is then in condition for use.
  • the head portion 2010f the anode may be provided with a tungsten target 21 which is more dense than the remainder to the powdered tungsten through the movable carbon members 14 and 15.
  • a tungsten target 21 which is more dense than the remainder to the powdered tungsten through the movable carbon members 14 and 15.
  • the carbon plungers' hayea tendency to buckle and break when pressure is applied to them. This difliculty is avoided by employing th 2 carbon members 14 and 15 merely to apply pressure to the tungsten powder and byapplying current through the sides of the mold, as indicated in F igs. 1 and 2 rather than through members 14: and 15.

Description

E. G. GILSON PROCESS FOR MAKING X-RAY ANODES Filed June 15, 1927 Inventor: v Emery 6.6ilson,
Has Attorney.
Patented May-29,1928.
UN Ep 3 ma eeuson, or comma, new YORK, assrenoa 'ro GENERAL ntnc'rmc comrear, 4 coaroaa'rron or new Yoax.
PROCESS FOR MAKING X-BAY .ANODES.
Application filed July 15.1927, Serial No. 206,102.
The present invention relates to the manufaeture of electrodes and more particularly to the manufacture of tungsten anodes .for
X-ray tubes. Heretofore, in the mannfae- 10 temperature of about .1400 C. The bar is then reheated by an electric current, swaged into the desired shape, ground and swagedto a stem of molybdenum or other suitable material.
15 It is one of the objects of the present invention to provide an improved process'for ac ratus shown in Fig. 1; while Fig. 3 is a perspective view of an X-ray anode constructed in accordance with the present process. Referring to the drawings, I have indicated at 1 the base plate of a press. A stationary angular metal member 2 is bolted to the base plate while a movable metal memher 3 is mounted on plate 1 opposite member'- 2. A pair of flat, water coo ed copper conductors 4 and 5 are mounted adjacent plates 2 and 3 respectively, and spaced therefrom *by insulators Sand 7. An insulator 8 is inserted between plate 1 and the lower ends of member 3 and conductor 4, and a similar insulator 9 is inserted between plate 1 and the lower ends of conductor 5 and insulator 7. A pair of carbon blocks 10 and 11,secured in any suitable manner to conductors 4 and 5, are adapted to supply current to a carbon mold 12 and to firmly clamp the mold in position on the press. Mold 12 is substantially rectangular in cross section and is provided with'a circular opening 13 extending therethrough' in which slidable carbon members 14 and 15 are mounted. The lower member 15 is-provided with a central opening 16 per end of the carbon member 15 and proe'ct a desired distance above that member.
cation of heat and. pressure to the powdered adapted to register with an opening 17 in the base plate '1, while the upper member 14 has an inclined face portion of substantially. the same form as the face portion of the finished anode. A stem 18, which may be made from molybdenum or tungsten, extends through the openings 16 and 17, and is provided at its upper end with an enlarged por-- tion so that the stem may rest upon the up- In operation, the carbon member 15 is placed on the press so that its opening 16 registers with the opening 17 in the plate 1. Mold 12 is then placed over the'movable member 15 and the block 10 moved into contact with the mold 12 by suitable pressure means applied tothe movable plate 3. A refractory powder, suchas tuhgsten, is then placed in the opening 13' in the mold 12 so as to completely surround and extend above the upper end of the rod 18. The movable carbon member 14 is then inserted in mold 12 and a pressure of about 1000 pounds per square inch or more applied thereto by a plunger 19. Simultaneous with the application of pressure, current is supplied to the mold and powdered refractory material through copper conductors 4 and 5 and carbon blocks 10 and 11. The current employed should have a value sufficiently high to heat the tungsten powder-at least to its sintering -temperature'and preferably to a temperature of about 3000 C. The simultaneous applitungsten provides a solid anode substantial-.
lyintegral with the stem portion and sub stantially free from voids. When removed from the mold, the anode and stem, may be polished'and is then in condition for use.
If desired, the head portion 2010f the anode may be provided with a tungsten target 21 which is more dense than the remainder to the powdered tungsten through the movable carbon members 14 and 15. At a temperat'ure of about 3000 C. however, the carbon plungers'hayea tendency to buckle and break when pressure is applied to them. This difliculty is avoided by employing th 2 carbon members 14 and 15 merely to apply pressure to the tungsten powder and byapplying current through the sides of the mold, as indicated in F igs. 1 and 2 rather than through members 14: and 15.
What I claim as new and desire to secure by Letters Patent of the United States, is,-
1. The method of making an electrode of refractory material which comprises surrounding one end of a metal stem with refractory material, and simultaneously applying heat and pressure to the refractory material.
2. The process of making an electrode of refractory material which comprises surrounding one end of a metal stem with refractory material, and simultaneously applying heat and pressure thereto in a confined space.
3. The process of making an electrode of refractory material which comprises surrounding one end of the metal stem with powdered refractory material, and simultaneously applying heat and pressure to the refractory material.
4. The process of making an electrode of refractory material which comprises surrounding one end of a metal stem with refractory material, heating the refractory material to a temperature at least as high as the sintering ten'iperature of the material, and simultaneously applying pressure thereto.
EMERY G. GILSON.
US206102A 1927-07-15 1927-07-15 Process for making x-ray anodes Expired - Lifetime US1671953A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US206102A US1671953A (en) 1927-07-15 1927-07-15 Process for making x-ray anodes
GB19802/28A GB293864A (en) 1927-07-15 1928-07-07 Improvements in and relating to the manufacture of x-ray anodes
FR657755D FR657755A (en) 1927-07-15 1928-07-10 Improvements in the fabrication of anodes for chi-ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US206102A US1671953A (en) 1927-07-15 1927-07-15 Process for making x-ray anodes

Publications (1)

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US1671953A true US1671953A (en) 1928-05-29

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Country Status (3)

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US (1) US1671953A (en)
FR (1) FR657755A (en)
GB (1) GB293864A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819515A (en) * 1951-06-26 1958-01-14 Thompson Prod Inc Method of making a blade
US2819961A (en) * 1952-12-20 1958-01-14 Int Standard Electric Corp Process for connecting a tantalum electrode pin to an electrode body
US2872611A (en) * 1953-11-16 1959-02-03 Sylvania Electric Prod Cathode
US2879436A (en) * 1955-03-02 1959-03-24 Jr Wilson S Geisler Traveling wave tube and method of constructing the same
US3010826A (en) * 1951-03-22 1961-11-28 Philips Corp Method of making dispenser type cathodes
US3300303A (en) * 1964-06-16 1967-01-24 John M Leach Composite article and method of making the same
US3489554A (en) * 1969-03-13 1970-01-13 Sylvania Electric Prod Art of producing emitter-type electrode structures

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010826A (en) * 1951-03-22 1961-11-28 Philips Corp Method of making dispenser type cathodes
US2819515A (en) * 1951-06-26 1958-01-14 Thompson Prod Inc Method of making a blade
US2819961A (en) * 1952-12-20 1958-01-14 Int Standard Electric Corp Process for connecting a tantalum electrode pin to an electrode body
US2872611A (en) * 1953-11-16 1959-02-03 Sylvania Electric Prod Cathode
US2879436A (en) * 1955-03-02 1959-03-24 Jr Wilson S Geisler Traveling wave tube and method of constructing the same
US3300303A (en) * 1964-06-16 1967-01-24 John M Leach Composite article and method of making the same
US3489554A (en) * 1969-03-13 1970-01-13 Sylvania Electric Prod Art of producing emitter-type electrode structures

Also Published As

Publication number Publication date
GB293864A (en) 1929-08-22
FR657755A (en) 1929-05-27

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