US3836803A - Rotary anode and an x-ray tube provided therewith - Google Patents

Rotary anode and an x-ray tube provided therewith Download PDF

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Publication number
US3836803A
US3836803A US00210905A US21090571A US3836803A US 3836803 A US3836803 A US 3836803A US 00210905 A US00210905 A US 00210905A US 21090571 A US21090571 A US 21090571A US 3836803 A US3836803 A US 3836803A
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US
United States
Prior art keywords
plate
cuts
anode
rotary anode
ray tube
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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
US00210905A
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English (en)
Inventor
K Silbermann
G Appelt
K Dietz
A Lenert
A Elsas
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
Siemens Corp
Original Assignee
Siemens Corp
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Filing date
Publication date
Priority claimed from DE19712112672 external-priority patent/DE2112672C3/de
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3836803A publication Critical patent/US3836803A/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
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes

Definitions

  • This invention relates to a rotary anode for an X-ray tube containing an anode plate made of material which melts with difficulty and upon which lies the focal spot path.
  • An object of the present invention is to simplify and improve existing constructions of this nature.
  • the anode plate is cut only on the locations upon which lies the focal path.
  • the inner part remains intact and acts as the connection. It is necessary to provide at least three cuts at equal distances from each other in order that the forces thus produced will be divided at least approximately without tensions. However, the number of divisions can be increased so that the plate can have, for example, or more cuts and will be still a sufficiently compact anode. If there are too many cuts the surface of the anode will be too narrow.
  • FIG. 1 is a perspective view partly in section of an X-ray tube constructed in accordance with the present invention.
  • FIG. 2 is a perspective view on an enlarged scale of a rotary anode used in the X-ray tube shown in FIG. 1, one quarter of the anode being removed to illustrate the cuts.
  • FIG. 3 is a section through one half of a differently constructed anode.
  • FIG. 4 is a perspective view of a rotary anode having radial cuts of different depths and extensions.
  • FIG. 1 shows an X-ray tube 2 having a cylindrical casing l at the two ends of which are arranged opposite each other in a known manner the cathode combination 3 and the anode combination 4.
  • the cathode combination 3 includes a cover 5 with a screen 6 containing the glow cathode (not shown).
  • the anode combination 4 consists of a rotor 7 and an anode plate 8 having a diameter of mm. and a thickness of 6 mm.
  • the plate 8 has focal point paths 9 and 10 in a manner known for anode plates.
  • the plate 8 is attached to the axle 11 by a screw 12 and is pressed against a flange 15 (FIG. 2).
  • FIG. 1 shows an X-ray tube 2 having a cylindrical casing l at the two ends of which are arranged opposite each other in a known manner the cathode combination 3 and the anode combination 4.
  • the cathode combination 3 includes a cover 5 with a screen 6 containing the glow ca
  • the plate 8 also shows the layer-like construction of the plate 8 which consists of a base body 16 of molybdenum and a layer 17 which is [.5 mm. thick of a rhenium-tungsten alloy for the focal point paths 9 and 10.
  • Four cuts are provided to increase heat elasticity. Only two of these cuts 13 and 14 are shown in the drawings. The cuts are ground at equal distances from each other from the bottom side of the plate 8. At the edge they are 4 mm. deep and extend to a zero depth at a distance of IO mm. from the axle 11.
  • the required operating and heating voltages are supplied to the X-ray tube for ray production in the usual manner through the conduits 18, 19 and 20'and the anode base 21.
  • the sections 22, 23 and 24 of the anode plate can move relatively to each other when they expand by heat without producing any tears.
  • FIG. 3 shows a section through a part of an anode 25 wherein the cuts extend through the entire thickness of the plate 26 and reach radially to an inner part 27 which is made thicker to improve the attachment.
  • FIG. 4 shows a plate 28 having two focal spot paths 29 and 30 and provided with cuts 31 and 32 of different depths.
  • the cuts 31 extend radially to the inner edge of the inner focal spot path 30 and the cuts 32 which are located intermediately between the cuts 31, extend to the inner edge of the outer focal spot path 29.
  • the axial extension of all cuts 31, 32 deviates from the direction of the axle fitting into the opening 33 and which extends parallel to the electron ray producing the X-ray radiation. This construction prevents the passing of electrons which come directly from the cathode; it can be recognized particularly by the inclined location of the cuts 31 and 32 at the edge of the plate 28, consisting like plates 8 and 26 of difficultly meltable material (refractory material).
  • a rotary anode for an X-ray tube comprising an anode plate of refractory material upon which lies the focal point path, said plate having a radial cut upon that part of the radius which extends from an outer edge to close to the center of the plate, but terminates outside of the center.
  • a rotary anode according to claim 1 wherein said plate has at least three spaced radial cuts, the radial lengths of these cuts at least including surfaces struck by the electrons.
  • a rotary anode according to claim 1 wherein said plate has two focal spot paths, some of said cuts extending to the inner edge of the outer focal spot path, other cuts extending to the inner edge of the inner focal spot path.
  • a rotary anode according to claim 1 wherein the direction of the cut at least partly deviates from he axial direction of the plate.
  • a rotary anode according to claim 1 wherein said plate has a central portion which is thicker than the edge portion.

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  • X-Ray Techniques (AREA)
US00210905A 1971-03-16 1971-12-22 Rotary anode and an x-ray tube provided therewith Expired - Lifetime US3836803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712112672 DE2112672C3 (de) 1971-03-16 Röntgenröhren-Drehanodenteller

Publications (1)

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US3836803A true US3836803A (en) 1974-09-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00210905A Expired - Lifetime US3836803A (en) 1971-03-16 1971-12-22 Rotary anode and an x-ray tube provided therewith

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Country Link
US (1) US3836803A (enrdf_load_stackoverflow)
AT (1) AT315305B (enrdf_load_stackoverflow)
FR (1) FR2130259B1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973156A (en) * 1974-01-23 1976-08-03 U.S. Philips Corporation Anode disc for an X-ray tube comprising a rotary anode
DE2833751A1 (de) * 1978-08-01 1980-02-14 Siemens Ag Drehanodenteller fuer roentgenroehren
US4531227A (en) * 1981-09-30 1985-07-23 Tokyo Shibaura Denki Kabushiki Kaisha Rotary anode for X-ray tube
US4736400A (en) * 1986-01-09 1988-04-05 The Machlett Laboratories, Inc. Diffusion bonded x-ray target
US4969173A (en) * 1986-12-23 1990-11-06 U.S. Philips Corporation X-ray tube comprising an annular focus
US4991194A (en) * 1987-12-30 1991-02-05 General Electric Cgr S.A. Rotating anode for X-ray tube
US20040208288A1 (en) * 2003-01-20 2004-10-21 Eberhard Lenz X-ray anode having an electron incident surface scored by microslits

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7115946A (enrdf_load_stackoverflow) * 1971-11-19 1973-05-22
DE2910138A1 (de) * 1979-03-15 1980-09-25 Philips Patentverwaltung Anodenscheibe fuer eine drehanoden- roentgenroehre

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947998C (de) * 1954-12-08 1956-08-23 Mueller C H F Ag Anode fuer Drehanoden-Roentgenroehren
US3763387A (en) * 1970-02-28 1973-10-02 Siemens Ag X-ray tube with rotary anode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947998C (de) * 1954-12-08 1956-08-23 Mueller C H F Ag Anode fuer Drehanoden-Roentgenroehren
US3763387A (en) * 1970-02-28 1973-10-02 Siemens Ag X-ray tube with rotary anode

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973156A (en) * 1974-01-23 1976-08-03 U.S. Philips Corporation Anode disc for an X-ray tube comprising a rotary anode
DE2833751A1 (de) * 1978-08-01 1980-02-14 Siemens Ag Drehanodenteller fuer roentgenroehren
US4255685A (en) * 1978-08-01 1981-03-10 Siemens Aktiengesellschaft Rotating anode for x-ray tubes
US4531227A (en) * 1981-09-30 1985-07-23 Tokyo Shibaura Denki Kabushiki Kaisha Rotary anode for X-ray tube
US4736400A (en) * 1986-01-09 1988-04-05 The Machlett Laboratories, Inc. Diffusion bonded x-ray target
US4969173A (en) * 1986-12-23 1990-11-06 U.S. Philips Corporation X-ray tube comprising an annular focus
US4991194A (en) * 1987-12-30 1991-02-05 General Electric Cgr S.A. Rotating anode for X-ray tube
US20040208288A1 (en) * 2003-01-20 2004-10-21 Eberhard Lenz X-ray anode having an electron incident surface scored by microslits
US7079625B2 (en) * 2003-01-20 2006-07-18 Siemens Aktiengesellschaft X-ray anode having an electron incident surface scored by microslits

Also Published As

Publication number Publication date
FR2130259A1 (enrdf_load_stackoverflow) 1972-11-03
FR2130259B1 (enrdf_load_stackoverflow) 1977-04-01
AT315305B (de) 1974-05-27
DE2112672B2 (de) 1975-10-23
DE2112672A1 (de) 1972-09-28

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