US3882314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for X-ray treatment
Assignee: Siemens AG
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Filing: 1974-02-08
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Granted: 1975-05-06
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Expires: 1994-02-08
Abstract
Abstract A device for X-ray treatment comprising an electronic accelerator, an anticathode exposed to the accelerated electrons for producing X-rays, an adjustable collimator for the X-rays, and at least one member for equalizing the density of the X-rays passing the collimator. The invention is particularly characterized by the provision of two ray detectors for increasing the operational safety of the irradiating device, the ray detectors being connected to supervising devices and being located in the part of the X-ray cone which is not influenced by the screen. The first detector is located centrally to the X-ray cone passing the collimator and in the ray direction behind the equalizing member, while the second detector is located to the side of the central ray of said X-ray cone.
Inventors
- 👤 Riccardo Benedetti
- 👤 Rudolf Meyer
- 👤 Franz Petersilka
- 👤 Rudolf Schittenhelm
- 👤 Leonhard Taumann
- 👤 Wolf-Eberhard Schiegl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 00:48
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/06; G; G01; G01T; G01T1/00; G01T1/29; G21; G21K; G21K1/00; G21K1/10; H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/38; H05G1/42; H05G1/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
233 words
A device for X-ray treatment, comprising an electronic accelerator, an anticathode exposed to the accelerated electrons for producing X-rays, an adjustable collimator for X-rays, at least one member for equalizing the density of the X-rays in the cone of X-rays passing the collimator adapted to be shifted into the X-ray cone, supervising devices for the correct positioning of said member, and two ray detectors connected to said supervising devices in the part of the X-ray cone which is not influenced by said collimator for increasing operational safety, the first one of say ray detectors being located centrally to the central ray of the X-ray cone passing the collimator behind said equalizing member, the second of said ray detectors being located to the side of said central ray, wherein, in the ray direction the two ray detectors are located in front of said collimator and said equalizing member, wherein said first ray detector, located centrally to the central ray of the X-ray cone, has the shape of a circular disk, and wherein the second ray detector surrounds annularly the first ray detector, the two ray detectors being fixed to said equalizing member, and wherein the two ray detectors are equally sensitive toward X-rays and have equal surfaces directed to the X-ray source, said supervising devices comprising an alarm device and a differential amplifier connected to the two ray detectors and to said alarm device.
Claim 2
Independent Claim
233 words
A device for X-ray treatment, comprising an electronic accelerator, an anticathode exposed to the accelerated electrons for producing X-rays, an adjustable collimator for X-rays, at least one member for equalizing the density of the X-rays in the cone of X-rays passing the collimator adapted to be shifted into the X-ray cone, supervising devices for the correct positioning of said member, and two ray detectors connected to said supervising devices in the part of the X-ray cone which is not influenced by said collimator for increasing operational safety, the first one of say ray detectors being located centrally to the central ray of the X-ray cone passing the collimator behind said equalizing member, the second of said ray detectors being located to the side of said central ray, wherein, in the ray direction the two ray detectors are located in front of said collimator and said equalizing member, wherein said first ray detector, located centrally to the central ray of the X-ray cone, has the shape of a circular disk, and wherein the second ray detector surrounds annularly the first ray detector, the two ray detectors being fixed to said equalizing member, and wherein the two ray detectors are equally sensitive toward X-rays and have equal surfaces directed to the X-ray source, said supervising devices comprising an alarm device and a differential amplifier connected to the two ray detectors and to said alarm device.
Claim 3
Dependent Claim
23 words
A device for X-ray treatment according to claim 1, said supervising device comprising separate ray-indicating instrumenTs connected to each of said ray detectors.
Claim 4
Dependent Claim
44 words
A device for X-ray treatment according to claim 1, said supervising device comprising an automatic switching-off device connected to the two ray detectors for switching off said accelerator when a maximum preset X-ray dosage has been reached in one of said two ray detectors.
Claim 5
Dependent Claim
24 words
A device for X-ray treatment according to claim 1, comprising an automatic switching-off device connected to said alarm device for switching off said accelerator.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |