US4221968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-Ray diagnostic generator comprising an inverter supplying the high voltage transformer
Assignee: Siemens AG
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Filing: 1978-12-13
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Granted: 1980-09-09
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Expires: 1998-12-13
Abstract
Abstract The inverter delivers a supply frequency for the high voltage transformer which lies in the kHz-range. There is connected to the input of the inverter a smoothing circuit which is fed by a mains rectifier. There is series connected to the smoothing circuit a phase gating control for controlling the duty cycle of the pulses supplied to the smoothing circuit and thus for controlling the x-ray tube voltage.
Inventors
- 👤 Kurt Franke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:43
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/10; H05G1/12; H05G1/26; H05G1/30; H05G1/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
96 words
An x-ray diagnostic generator comprising an x-ray tube, a high voltage transformer supplying the x-ray tube, an inverter connected to the input of the high voltage transformer, a mains rectifier supplying power to the inverter, and control means for controlling for the x-ray tube voltage, characterized in that a smoothing circuit (6) is connected to the input of the inverter (5), and a phase gating control (7) controlling the duty cycle of the current pulses supplied to the smoothing circuit (6), said phase gating control (7) forming the control means for controlling the x-ray tube voltage.
Claim 2
Dependent Claim
96 words
An x-ray diagnostic generator comprising an x-ray tube, a high voltage transformer supplying the x-ray tube, an inverter connected to the input of the high voltage transformer, a mains rectifier supplying power to the inverter, and control means for controlling for the x-ray tube voltage, characterized in that a smoothing circuit (6) is connected to the input of the inverter (5), and a phase gating control (7) controlling the duty cycle of the current pulses supplied to the smoothing circuit (6), said phase gating control (7) forming the control means for controlling the x-ray tube voltage.
Claim 3
Dependent Claim
28 words
An x-ray diagnostic generator according to claim 1, characterized in that the phase gating control (7) is connected between the mains rectifier (8) and the smoothing circuit (6).
References Cited (Backward Citations)
US3828194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |