US3683223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube having a ray transmission rotary anode
Assignee: Siemens AG
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Filing: 1969-12-05
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Granted: 1972-08-08
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Expires: 1989-12-05
Abstract
Abstract An X-ray apparatus has an X-ray tube situated in a cover screening the rays. The effective focal point of the X-ray tube is located behind a ray transmitting opening in the cover,-the ray outlet window,-upon a thin layer of difficultly fusible material which itself is carried by an anode body made of ray transmitting material. The present invention is particularly characterized in that this layer is constructed as the ray transmitting anode in that at least parts of its upper surface and of its lower surface lying upon the transmitting supporting material of the anode, are directed toward the ray outlet window and in that the thickness of the layer at least approximately corresponds to the depth of penetration of electrons into the material of the layer at the expected highest acceleration voltage.
Inventors
- 👤 Kurt Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:23
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J2235/00; H01J2235/08; H01J2235/086
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
In combination with an X-ray shielding member having a window, an X-ray tube for projecting an X-ray beam through said window and having a vacuum bulb, a cathode upon one end of said bulb, an anode upon the opposite end of said bulb and having a rotary anode body having a rotary axle and a surface carrying a layer of refractory material, means actuating said cathode to produce an electron beam having electrons striking said layer, said layer having a region forming the focal spot path, the thickness of said region being substantially equal to the depth to which electrons penetrate into the layer at the highest acceleration voltage to be operatively utilized between the cathode and the anode, said layer having a surface portion facing away from the anode body and emitting X-rays constituting a part of the X-ray beam and a surface portion contacting the anode body and also emitting X-rays constituting a part of the X-ray beam, said anode body having an X-ray permeable region through which the last-mentioned X-rays are emitted.
Claim 2
Dependent Claim
175 words
In combination with an X-ray shielding member having a window, an X-ray tube for projecting an X-ray beam through said window and having a vacuum bulb, a cathode upon one end of said bulb, an anode upon the opposite end of said bulb and having a rotary anode body having a rotary axle and a surface carrying a layer of refractory material, means actuating said cathode to produce an electron beam having electrons striking said layer, said layer having a region forming the focal spot path, the thickness of said region being substantially equal to the depth to which electrons penetrate into the layer at the highest acceleration voltage to be operatively utilized between the cathode and the anode, said layer having a surface portion facing away from the anode body and emitting X-rays constituting a part of the X-ray beam and a surface portion contacting the anode body and also emitting X-rays constituting a part of the X-ray beam, said anode body having an X-ray permeable region through which the last-mentioned X-rays are emitted.
Claim 3
Dependent Claim
39 words
An X-ray apparatus in accordance with claim 1, wherein said anode consists of a graphite plate and wherein said layer consists of wolfram and has a thickness less than 100 Mu and ranging between 3 and 10 Mu .
Claim 4
Dependent Claim
34 words
An X-ray apparatus in accordance with claim 1, wherein said anode has a ridge extending as a ring around said rotary axle, the layer forming the focal point path being carried upon said ridge.
Claim 5
Dependent Claim
26 words
An X-ray apparatus in accordance with claim 1, wherein said focal point path is located in a groove extending as a ring around said rotary axle.
Claim 6
Dependent Claim
30 words
The X-ray apparatus in accordance with claim 1, comprising a wall consisting of ray transmitting anode material and located at least upon the outer edge of the focal point path.
Claim 7
Dependent Claim
36 words
An X-ray apparatus in accordance with claim 5, wherein said anode has a portion extending at least under the outer half of the focal point path and hAving a thickness equal to that of said wall.
Claim 8
Dependent Claim
21 words
An X-ray apparatus in accordance with claim 5, comprising another wall located upon the inner edge of the focal point path.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |