US3354375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyristor system for controlling direct current
Assignee: Siemens Schuckertwerke AG
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Filing: 1964-12-03
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Granted: 1967-11-21
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Expires: 1984-12-03
Abstract
No abstract record available.
Inventors
- 👤 Poppinger Herbert
- 👤 Volkmann Werner
- 👤 Daubler Rainer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:21
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/722; H03K17/723; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
SYSTEM FOR CONTROLLING THE MEANS VALUE OF A LOAD CURRENT BY PERIODIC SWITCHING, COMPRISING LOAD BUSES, A FIRST DIRECT-CURRENT SOURCE AND A FIRST THYRISTOR THROUGH WHICH SAID FIRST SOURCE IS CONNECTED TO SAID LOAD BUSES FOR APPLYING A FIRST SOURCE VOLTAGE THERETO, A SECOND DIRECT-CURRENT SOURCE HAVING A PERIODIC VOLTAGE WHICH IS AT LEAST TEMPORARILY ZERO AND THEREAFTER LOWER THAN SAID FIRST SOURCE VOLTAGE IN A FIRST PORTION OF EACH SWITCHING PERIOD AND IS HIGHER THAN SAID FIRST SOURCE VOLTAGE IN THE REMAINING PORTION OF SAID PERIOD, A SECOND THYRISTOR THROUGH WHICH SAID SECOND SOURCE IS CONNECTED TO SAID LOAD BUSES FOR APPLYING SAID PERIODIC VOLTAGE THERETO, AND
Claim 2
Dependent Claim
108 words
SYSTEM FOR CONTROLLING THE MEANS VALUE OF A LOAD CURRENT BY PERIODIC SWITCHING, COMPRISING LOAD BUSES, A FIRST DIRECT-CURRENT SOURCE AND A FIRST THYRISTOR THROUGH WHICH SAID FIRST SOURCE IS CONNECTED TO SAID LOAD BUSES FOR APPLYING A FIRST SOURCE VOLTAGE THERETO, A SECOND DIRECT-CURRENT SOURCE HAVING A PERIODIC VOLTAGE WHICH IS AT LEAST TEMPORARILY ZERO AND THEREAFTER LOWER THAN SAID FIRST SOURCE VOLTAGE IN A FIRST PORTION OF EACH SWITCHING PERIOD AND IS HIGHER THAN SAID FIRST SOURCE VOLTAGE IN THE REMAINING PORTION OF SAID PERIOD, A SECOND THYRISTOR THROUGH WHICH SAID SECOND SOURCE IS CONNECTED TO SAID LOAD BUSES FOR APPLYING SAID PERIODIC VOLTAGE THERETO, AND
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |