US4680693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous high d.c. voltage supply particularly for an X-ray emitter tube
Assignee: General Electric CGR SA
•
Filing: 1986-02-10
•
Granted: 1987-07-14
•
Expires: 2006-02-10
Abstract
Abstract A d.c. voltage is produced from a single-phase electric mains for supplying an X-ray tube. This supply is pulsed under the control of a synchronizing circuit with which it is further possible to adjust the duration of the operating pulses, as well as their phase blocking with respect to the mains. By acting in this way excessive current is not taken during the voltage troughs between two successive half-waves. The losses by the Joule effect in the mains are reduced and the quality of the pulsed high voltage is improved because of the increased stability. There is only a slight increase in the exposure time.
Inventors
- 👤 Claude Carron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:28
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/32; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/337; H02M3/3376; H02M5/00; H02M5/40; H02M5/42; H02M5/44; H02M5/453; H02M5/458; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5387; H02M7/53871; H02M7/53873; H05G1/10; H05G1/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A high voltage d.c. supply which receives alternating electrical energy from a general single-phase distribution mains, comprising: means for periodically tapping said energy from said mains during periods having a duration less than a half-wave of the alternating electrical energy to thereby produce periodically chopped high d.c. voltage synchronized with said alternating electrical energy; means for regulating said chopped high voltage wherein said regulating means includes a frequency modulator for modulating an oscillating frequency of a ripple generator and wherein said means for periodically tapping said energy includes a means for validating that said regulating means is operating.
Claim 2
Dependent Claim
98 words
A high voltage d.c. supply which receives alternating electrical energy from a general single-phase distribution mains, comprising: means for periodically tapping said energy from said mains during periods having a duration less than a half-wave of the alternating electrical energy to thereby produce periodically chopped high d.c. voltage synchronized with said alternating electrical energy; means for regulating said chopped high voltage wherein said regulating means includes a frequency modulator for modulating an oscillating frequency of a ripple generator and wherein said means for periodically tapping said energy includes a means for validating that said regulating means is operating.
Claim 3
Dependent Claim
71 words
A supply according to claim 1, comprising: first rectifying means connected to said mains, wherein said ripple generator is connected to the first rectifying means, and wherein said ripple generator produces a rippled voltage; means for raising the voltage produced by said ripple generator and a second rectifying and filtering means connected to said raising means, wherein said periodic tapping means includes means for synchronizing said ripple generator with said mains.
Claim 4
Dependent Claim
18 words
A supply according to claim 2, wherein said first and second rectifying means are a double half-wave rectifier.
Claim 5
Dependent Claim
29 words
A supply according to one of claims 2 or 3, wherein the synchronizing means includes means for varying said means for synchronizing depending upon the phase of said mains.
Claim 6
Dependent Claim
30 words
A supply according to any one of the claims 2 or 3, wherein said synchronization means includes means for increasing or decreasing the times during which said tapping is performed.
References Cited (Backward Citations)
US3539812A
Cited
FR2184732A1
Cited
US4200795A
Cited
US4227243A
Cited
FR2415415A1
Cited
FR2455844A1
Cited
US4301498A
Cited
US4525774A
Cited
EP0108336A2
Cited
US4504895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |