US3801846A - X-ray tube with a rotary anode - Google Patents

X-ray tube with a rotary anode Download PDF

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Publication number
US3801846A
US3801846A US00341484A US3801846DA US3801846A US 3801846 A US3801846 A US 3801846A US 00341484 A US00341484 A US 00341484A US 3801846D A US3801846D A US 3801846DA US 3801846 A US3801846 A US 3801846A
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US
United States
Prior art keywords
anode
case
metal
rotor
ray tube
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
US00341484A
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English (en)
Inventor
K Haberrecker
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 AG
Original Assignee
Siemens 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 AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3801846A publication Critical patent/US3801846A/en
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • 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
    • H01J35/1017—Bearings for rotating anodes
    • H01J35/1024—Rolling bearings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/10—Drive means for anode (target) substrate
    • H01J2235/1026—Means (motors) for driving the target (anode)

Definitions

  • X-ray tubes with rotary anodes used in the present X-ray technology have vacuum cases which usually consist of glass. Glass is used since it is well adapted to treatments used in X-ray tube manufacture and since at the same time it provides electrical insulation. However, the manufacture involves the use of trained persons familiar with the treatment of glass.
  • An object of the present invention is to simplify the making of X-ray tubes and to provide X-ray tubes which can be manufactured by persons who are not familiar with the treatment of glass.
  • this metal is a poor conductor of electrical current.
  • the poor conductivity of I electrical current is to be considered in comparison to that of copper.
  • a poorly conducting material which also has sufficient mechanical stability, is for example, non-magnetic rustfree steel, such as is known under the idication V2A- steel.
  • X-ray tubes with rotary anodes having a part consisting of metal, which separates the rotor from the stator, can be made with less precision, since this part containing the rotary section of the tube when made of metal does not require the precise manufacture necessary for glass parts. Furthermore, the fixing of the parts to each other can be made in a much more simple way, since attaching means can be used which are generally used in metal constructions. In addition, due to small electrical conductivity the induced electrical output and thus the heat loan remain small during operation.
  • An X-ray tube is known already the case of which consists to a larger part of metal and wherein the part between therotor and the stator is also of metal.
  • magnetically conducting parts are inserted at the stator poles into the case.
  • the complication of this construction the parts of which must be inserted vacuum tightly, was obviously the reason why the tube which is known for nearly 30 years, has not been used in X-ray practice.
  • the prior tube does not have the recognition of the present invention that it is possible to eliminate magnetically conducting inserts when a metal part of small electrical conductivity is used.
  • FIG. 1 is a partly sectional view of an X-ray tube with a rotary anode of the usual type, wherein the part containing the rotor consists of metal.
  • FIG. 2 is a circuit diagram showing electrical means for operating the X-ray tube with a rotary anode according to the present invention.
  • FIG. 3 is a partly sectional view of an X-ray tube with a rotary anode which is mounted in ball bearing on both sides of its anode.
  • FIG. 1 shows an X-ray tube 1 having a vacuum case, the end 2 of which directed toward the cathode consists of glass while the end 3 directed toward the anode consists of metal.
  • the cathode 4 is introduced into the case in the usual manner and includes a shoulder 5 in which the glow cathode 5 is provided.
  • the glow cathode 5 is supplied electrically by conduits 7 and 8.
  • An electronic ray leaving the glow cathode 6 and symbolically indicated in FIG. 1 by the broken line 9 strikes the rotary anode l0 and produces there a bundle of X-rays indicated by broken lines as a cone 11.
  • the anode 10 is connected by its axle 12 with the rotor 13 which is mounted by support 14 in ball bearings.
  • the support 14 is soldered in a suitable opening of the base 15 of a metal case part 16 consisting of rust-free V2A steel.
  • the part 16 is welded to the glass part 2 by means of a flange 19 molten with the glass case.
  • the flange is bent vertically outwardly relatively to the longitudinal axis of the tube, while the metal part l6'has the shape of a cup-like piece adapted to the rotor l3 and having a wall thickness of 0.5 to 1 mm. Its free end is bent outwardly so that the end of the bent part fits with the edge of the flange 17, as shown by the weld seam 18 in the drawing.
  • the stator 19 used to drive the anode 10 is located outside of the metal part. As usual, it has four poles.
  • the operation of the tube takes place in a simple manner shown in FIG. 2.
  • the connections 20 are connected with the net, so that the X-ray apparatus 21 supplies the corresponding electrical values. They are then transmitted on the one hand through the conduit 22 and on the other hand through the grounded conduit 23 as operational current to the tube 1.
  • the heating of the cathode 6 takes place through the heating current source 24, the current being transmitted to the cathode 6 through the conduit 7 and the conduit 25 connected with the conduit 8.
  • the stator very closely, namely, directly on the outer side of the metal part 16.
  • the rotor 13 can be also arranged very closely to the inner side of the metal part 16. The shortening of the distances provides a considerable improvement of the effectiveness of the stator and rotor, namely, of the drive.
  • stator and the rotor which can consist of a known insulated sleeve or of oil filling a space forming the known tube covermg.
  • FIG. 3 shows a different construction ofthe X-ray tube which includes a metal container 26 constituting the vacuum case.
  • This case is pot-shaped and is closed by a plate 27, the edges of which are vacuum-tightly welded with the pot-like part 26, as indicated by the weld seam 28.
  • the pot-like part 26 as well as the cover 27 are round, consist of refined steel sheets 1 mm thick and are provided at their center with a support for the anode 29.
  • the base of the pot-like part 26 as well as the central portion of the cover 27 are provided with recesses 30 and 31, respectively. These recesses contain a bearing 32 and a rotor 33. The drawing shows these parts only in the sectioned location of the recess 31.
  • the rotary anode 29 itself consists of a conical part at the periphery of which an X-ray bundle 41 is produced which can pass outwardly through the cover 27.
  • the tube is operated in the above indicated manner in that an apparatus corresponding to the apparatus 21 of FIG. 2 provides high voltage to the tube on the one hand through the line 42 and on the other hand through the grounded line.
  • the heating voltage from a source corresponding to the source 24 of FIG. 2 is provided between the lines 42 and 44. The operation is the same as that of the tube of FIG. 1.
  • the tube of FIG. 3 can also have a two pole operation. In that case it is also necessary to provide an elecmotor having a stator and a rotor connected with said anode for rotating said anode, and a case, said anode,
  • An X-ray tube according to claim 1 wherein said case has a portion consisting of glass which carries said cathode and encloses said anode, and a pot-like portion consisting of metal and enclosing said rotor.
  • An X-ray tube according to claim 1, wherein said anode has an axle, and bearings supporting said axle at opposite ends, each of said bearings having a separate rotor, the portion of the case enclosing the rotors consisting of metal of poor electrical conductivity.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • X-Ray Techniques (AREA)
US00341484A 1972-03-17 1973-03-15 X-ray tube with a rotary anode Expired - Lifetime US3801846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2213184A DE2213184A1 (de) 1972-03-17 1972-03-17 Drehanoden-roentgenroehre

Publications (1)

Publication Number Publication Date
US3801846A true US3801846A (en) 1974-04-02

Family

ID=5839318

Family Applications (1)

Application Number Title Priority Date Filing Date
US00341484A Expired - Lifetime US3801846A (en) 1972-03-17 1973-03-15 X-ray tube with a rotary anode

Country Status (5)

Country Link
US (1) US3801846A (de)
JP (1) JPS496889A (de)
CH (1) CH545003A (de)
DE (1) DE2213184A1 (de)
FR (1) FR2176803B3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986064A (en) * 1973-10-15 1976-10-12 U.S. Philips Corporation Rotary-anode X-ray tube
US4024424A (en) * 1974-11-27 1977-05-17 U.S. Philips Corporation Rotary-anode X-ray tube
US4040681A (en) * 1973-05-21 1977-08-09 U.S. Philips Corporation Magnetically levitated object
US4357555A (en) * 1979-05-08 1982-11-02 U.S. Philips Corporation Rotary anode X-ray tube
US5173931A (en) * 1991-11-04 1992-12-22 Norman Pond High-intensity x-ray source with variable cooling

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399124A1 (fr) * 1977-07-29 1979-02-23 Radiologie Cie Gle Tube a rayons x a anode tournante
US4388728A (en) * 1978-11-20 1983-06-14 The Machlett Laboratories, Incorporated Soft X-ray lithography system
JPH0122548Y2 (de) * 1984-10-05 1989-07-05
DE102013207806A1 (de) * 2013-04-29 2014-10-30 Siemens Aktiengesellschaft Elektrische Maschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336769A (en) * 1942-03-26 1943-12-14 Gen Electric X Ray Corp X-ray tube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336769A (en) * 1942-03-26 1943-12-14 Gen Electric X Ray Corp X-ray tube

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040681A (en) * 1973-05-21 1977-08-09 U.S. Philips Corporation Magnetically levitated object
US3986064A (en) * 1973-10-15 1976-10-12 U.S. Philips Corporation Rotary-anode X-ray tube
US4024424A (en) * 1974-11-27 1977-05-17 U.S. Philips Corporation Rotary-anode X-ray tube
US4357555A (en) * 1979-05-08 1982-11-02 U.S. Philips Corporation Rotary anode X-ray tube
US5173931A (en) * 1991-11-04 1992-12-22 Norman Pond High-intensity x-ray source with variable cooling
US5295175A (en) * 1991-11-04 1994-03-15 Norman Pond Method and apparatus for generating high intensity radiation

Also Published As

Publication number Publication date
FR2176803B3 (de) 1976-03-12
FR2176803A1 (de) 1973-11-02
JPS496889A (de) 1974-01-22
CH545003A (de) 1973-11-30
DE2213184A1 (de) 1973-09-27

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