US3157806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous machine with salient poles
Assignee: BBC Brown Boveri AG Germany
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Filing: 1960-11-03
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Granted: 1964-11-17
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Expires: 1980-11-03
Abstract
No abstract record available.
Inventors
- 👤 Wiedemann Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:00
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/22; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A SYNCHRONOUS DYNAMO ELECTRIC MACHINE HAVING STATOR AND ROTOR MEMBERS, A WINDING ON SAID STATOR, SAID ROTOR MEMBER BEING PROVIDED WITH SALIENT POLES SPACED AROUND THE PERIPHERY THEREOF AND WINDINGS ON SAID POLES OF THE DIRECT LIQUID COOLED TYPE, THE IMPROVEMENT WHEREIN THE GAPS BETWEEN ADJACENT POLES ARE COMPLETELY CLOSED BY WALL SURFACES THEREBY TO REDUCE THE FRICTION AND VENTILATION LOSSES.
Claim 2
Dependent Claim
62 words
IN A SYNCHRONOUS DYNAMO ELECTRIC MACHINE HAVING STATOR AND ROTOR MEMBERS, A WINDING ON SAID STATOR, SAID ROTOR MEMBER BEING PROVIDED WITH SALIENT POLES SPACED AROUND THE PERIPHERY THEREOF AND WINDINGS ON SAID POLES OF THE DIRECT LIQUID COOLED TYPE, THE IMPROVEMENT WHEREIN THE GAPS BETWEEN ADJACENT POLES ARE COMPLETELY CLOSED BY WALL SURFACES THEREBY TO REDUCE THE FRICTION AND VENTILATION LOSSES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |