US4234793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-Ray diagnostic generator for operation with falling load
Assignee: Siemens AG
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Filing: 1979-03-30
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Granted: 1980-11-18
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Expires: 1999-03-30
Abstract
Abstract In an exemplary embodiment, a comparator is present which compares the actual value of the x-ray tube output with a time-varying rated value output of the function generator which controls the falling load characteristic, and effects the switching off of the x-ray tube to prevent an overloading thereof if the difference between the actual and the rated value of the x-ray tube output exceeds a predetermined limit for a time interval exceeding a predetermined minimum time span.
Inventors
- 👤 Heribert Amtmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:25
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/38; H05G1/42; H05G1/46
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
An x-ray diagnostic generator for operation with falling load with a control means for controlling x-ray tube output, and a function generator which, during an x-ray exposure, generates a rated value signal for the x-ray tube output according to a falling exponential function which effects the adjustment of the x-ray tube output via the control means, characterized by a cut-off element (24) actuatable for shutting off x-ray tube operation prior to expiration of the x-ray exposure time, and a comparator (22) for comparing the actual and the rated value of the x-ray tube output, and connected to the cut-off element (24) for actuating the same to switch off x-ray tube operation when the difference between actual and rated value exceeds a predetermined value.
Claim 2
Dependent Claim
123 words
An x-ray diagnostic generator for operation with falling load with a control means for controlling x-ray tube output, and a function generator which, during an x-ray exposure, generates a rated value signal for the x-ray tube output according to a falling exponential function which effects the adjustment of the x-ray tube output via the control means, characterized by a cut-off element (24) actuatable for shutting off x-ray tube operation prior to expiration of the x-ray exposure time, and a comparator (22) for comparing the actual and the rated value of the x-ray tube output, and connected to the cut-off element (24) for actuating the same to switch off x-ray tube operation when the difference between actual and rated value exceeds a predetermined value.
Claim 3
Dependent Claim
66 words
An x-ray diagnostic generator according to claim 1, characterized in that a time function element (23) lies between the comparator (22) and the cut-off element (24), which time function element (23) only relays a cut-off signal of the comparator (22) to the cut-off element (24) when the cut-off signal is present at the input of the time function element (23) during a programmed minimum time span.
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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |