Patent US424894A successfully refreshed from Google Patents.
US3710162A
Expired / Lapsed
US
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X-ray tube having a rotary anode
Assignee: Compagnie Generale de Radiologie SA
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Filing: 1971-02-19
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Granted: 1973-01-09
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Expires: 1991-02-19
Abstract
Abstract An X-ray tube having a rotary anode comprising a disc-shaped anode and a substantially cylindrical rotor, wherein the anoderotor assembly is made integrally of a single piece of graphite, whose cylindrical rotor part is provided with a ferromagnetic hollow cylinder whereupon acts the rotating electromagnetic field produced by the stator.
Inventors
- 👤 F Bougle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:35
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J35/1024; H01J2235/00; H01J2235/10; H01J2235/1006; H01J2235/1013; H01J2235/20; H01J2235/205
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
An X-ray tube having a rotary anode, said anode comprising a first disc-shaped portion and a second portion in the shape of a hollow cylinder, said disc being covered, at least over an area corresponding to the focal track of the tube, with a layer of refractory material generating X-rays under electron bombardment, characterized in that said two anode portions are formed integrally from a single piece graphite having a very fine structure ; said second cylinder-shaped portion being provided, over at least part of its internal periphery, with a hollow cylinder of a ferromagnetic material, constituting the rotor on which the rotary stator field acts.
Claim 2
Dependent Claim
106 words
An X-ray tube having a rotary anode, said anode comprising a first disc-shaped portion and a second portion in the shape of a hollow cylinder, said disc being covered, at least over an area corresponding to the focal track of the tube, with a layer of refractory material generating X-rays under electron bombardment, characterized in that said two anode portions are formed integrally from a single piece graphite having a very fine structure ; said second cylinder-shaped portion being provided, over at least part of its internal periphery, with a hollow cylinder of a ferromagnetic material, constituting the rotor on which the rotary stator field acts.
Claim 3
Dependent Claim
50 words
X-ray tube as claimed in claim 1, wherein said anode-rotor assembly further comprises a further hollow cylinder or cylindrical layer coaxial with both said second cylindrical portion and said ferromagnetic cylinder and made of a material which is a good electrical conductor at least in direction parallel to its surface.
Claim 4
Dependent Claim
13 words
X-ray tube as claimed in claim 2, wherein said further cylinder is metallic.
Claim 5
Dependent Claim
28 words
X-ray tube as claimed in claim 3, wherein said metal cylinder or layer is placed in the vicinity of one of the faces of said second cylinder-shaped portion.
Claim 6
Dependent Claim
24 words
X-ray tube as claimed in claim 4, wherein said metal cylinder is made up by a layer of metal deposited upon said second portion.
Claim 7
Dependent Claim
35 words
X-ray tube as claimed in claim 2, wherein said further cylinder is built up by a layer of pyrolytical graphite deposited on at least a part of the outer face of said second cylinder-shaped portion.
Claim 8
Dependent Claim
21 words
X-ray tube as claimed in claim 6, wherein said pyrolytical graphite layer is heat treated so as to provide pseudo-monocrystalline structure.
Claim 9
Dependent Claim
16 words
X-ray tube as claimed in claim 1, wherein said X-ray generating material is a refractory metal.
Claim 10
Dependent Claim
19 words
X-ray tube as claimed in claim 1, wherein said X-ray generating material is a carbide of a refractory metal.
Claim 11
Dependent Claim
46 words
X-ray tube as claimed in claim 1, wherein said disc-shaped anode portion comprises one or more recesses or grooves formed in a part thereof not subjected to the electron bombardment, and filled with material having, after its evaporation, gas absorptive properties, in other words a getter.
References Cited (Backward Citations)
US2336271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |