US3717834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage transformer with means connected to the primary winding for equalizing the winding ratio
Assignee: Siemens AG
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Filing: 1971-03-17
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Granted: 1973-02-20
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Expires: 1991-03-17
Abstract
Abstract A VOLTAGE TRANSFORMER HAS AN EQUALIZING WINDING CONNECTED TO THE PRIMARY WINDING FOR EQUALIZING THE WINDING RATIO. THE EQUALIZING WINDING IS CONNECTED TO THE END OF THE PRIMARY WINDING AT THE LOW VOLTAGE SIDE AND AT LEAST ONE OF ITS TURNS IS STRUCTURALLY SEPARATED FROM THE PRIMARY WINDING AND IS MOUNTED ON THE IRON CORE OF THE VOLTAGE TRANSFORMED OR ON THE SECONDARY WINDING ARRANGEMENT.
Inventors
- 👤 H Wittich
- 👤 W Spanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:04
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/20; H01F38/22; H01F38/24; H01F38/26; G; G01; G01R; G01R1/00; G01R1/28; H01F27/00; H01F27/42; H01F27/422; H01F27/425
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |