US3646380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating-anode x-ray tube with a metal envelope and a frustoconical anode
Assignee: US Philips Corp
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Filing: 1969-08-19
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Granted: 1972-02-29
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Expires: 1989-08-19
Abstract
Abstract An X-ray tube having an evacuated metal envelope in which an anode is mounted for rotation about an axis perpendicular to an electron beam produced by a cathode. The anode is cooled and is frustoconical in shape, the inclined surface of which intercepts the electron beam. In a preferred embodiment, the anode is in the form of a disc consisting of molybdenum or graphite surrounded by a tire of tungsten or an alloy of tungsten and is at ground potential while the cathode is at a potential which causes X-rays to be generated and is secured to the envelope by an insulator having a recess for receiving a plug connected to a source of potential sufficient to generate X-rays.
Inventors
- 👤 Walter Hartl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:30
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/24; H01J35/26; H01J35/02; H01J35/04; H01J35/08; H01J35/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
An X-ray tube comprising a substantially cylindrical metal envelope, an electron-emitting element within the envelope for producing an electron beam in the axial direction of the envelope, a disc-shaped anode having a frustoconical circumferential surface positioned to intercept electrons, means to rotatably support the anode at right angles to the axis of the envelope including a shaft, a heat conducting metal support hermetically secured to the metal envelope, and bearing meanS positioned within said support for supporting said shaft.
Claim 2
Dependent Claim
79 words
An X-ray tube comprising a substantially cylindrical metal envelope, an electron-emitting element within the envelope for producing an electron beam in the axial direction of the envelope, a disc-shaped anode having a frustoconical circumferential surface positioned to intercept electrons, means to rotatably support the anode at right angles to the axis of the envelope including a shaft, a heat conducting metal support hermetically secured to the metal envelope, and bearing meanS positioned within said support for supporting said shaft.
Claim 3
Dependent Claim
23 words
An X-ray tube as claimed in claim 1 in which the support consists of copper and has channels for a circulating cooling fluid.
Claim 4
Dependent Claim
39 words
An X-ray tube as claimed in claim 1 in which the support has a cavity on each side opposite the anode between the anode and the bearing means in which rotatable blackened copper discs are secured to the shaft.
Claim 5
Dependent Claim
73 words
An X-ray tube as claimed in claim 1 in which the conductive support has a portion spaced from the wall of the envelope and a disc-shaped rotor member of an externally positioned induction motor rotatably supported by said shaft is positioned in the space between the conductive support and the inner wall of the envelope, and an insulating disc is provided in the wall of said envelope opposite said disc shaped rotor member.
References Cited (Backward Citations)
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US2427203A
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GB602750A
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US2480198A
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Cited
US2549614A
Cited
US2594564A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |