(19)
(11) EP 0 081 755 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.11.1984 Bulletin 1984/48

(43) Date of publication A2:
22.06.1983 Bulletin 1983/25

(21) Application number: 82111142

(22) Date of filing: 02.12.1982
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 02.12.1981 US 326752

(71) Applicant: Litton Systems, Inc.
 ()

(72) Inventor:
  • Klostermann, Heinrich F.
     ()

   


(54) Rotating anode X-ray tube


(57) An x-ray tube comprises a generally cylindrical evacuated metal tube envelope (410) having an anode (451) rotatably mounted therein. The tube envelope wall (525) includes ferrous segments (526a-526f) which minimize the gap in the magnetic coupling while permitting a thick and strong tube envelope wall. Drive means (230) includes a DC stator (240) external of the tube envelope acting on an internal rotor (235) mounted to rotate with the anode. Anode drive means also includes a DC stator (480) operating on a rotor (471) having encapsulated rare earth magnets (472a-472h), and an AC stator (570) operating on a squirrel cage rotor (550) through a laminated segmented tube wall (525).






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