Patent US4128781A successfully refreshed from Google Patents.
US4128781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube
Assignee: US Philips Corp
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Filing: 1977-02-10
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Granted: 1978-12-05
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Expires: 1997-02-10
Abstract
Abstract An X-ray source having a cathode rotatable relative to the anode and a motor for rotating the cathode to produce a corresponding rotation of the X-ray beam emitted by the source.
Inventors
- 👤 Peter Flisikowski
- 👤 Horst Peemoller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:11
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
An x-ray source comprising an envelope, an annular anode having an inner surface arranged in said envelope, a shaft mounted in said envelope for rotation about an axis coaxial with the axis of said anode, a cathode supported on said shaft for movement therewith along a circular path about said axis of rotation, said cathode being arranged to emit a beam of electrons onto the inner surface of said annular anode to produce a beam of X-ray radiation directed towards said axis of rotation so that upon movement of said cathode along said path, said X-ray beam traverses a generally conical path with the apex thereof lying along said axis of rotation, and means for rotating said shaft.
Claim 2
Dependent Claim
118 words
An x-ray source comprising an envelope, an annular anode having an inner surface arranged in said envelope, a shaft mounted in said envelope for rotation about an axis coaxial with the axis of said anode, a cathode supported on said shaft for movement therewith along a circular path about said axis of rotation, said cathode being arranged to emit a beam of electrons onto the inner surface of said annular anode to produce a beam of X-ray radiation directed towards said axis of rotation so that upon movement of said cathode along said path, said X-ray beam traverses a generally conical path with the apex thereof lying along said axis of rotation, and means for rotating said shaft.
Claim 3
Dependent Claim
43 words
An X-ray source according to claim 1 including a plate of material impermeable to X-ray radiation extending into the path of said X-ray beam, said plate being affixed to said shaft for rotation therewith and having an aperture for transmitting said X-ray radiation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |