Patent US3412271A successfully refreshed from Google Patents.
US3412271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless type alternating current machine
Assignee: Westinghouse Electric Corp
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Filing: 1965-12-08
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Granted: 1968-11-19
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Expires: 1985-12-08
Abstract
No abstract record available.
Inventors
- 👤 Walter O Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:58
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/04; H02K11/042; Y; Y10; Y10S; Y10S257/00; Y10S257/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A DYNAMOELECTRIC MACHINE HAVING AN ALTERNATING CURRENT WINDING AND A DIRECT CURRENT FIELD WINDING, SAID FIELD WINDING DISPOSED ON A HOLLOW ROTATABLE SHAFT, EXCITING MEANS FOR SAID FIELD WINDING INCLUDING A STATIONARY FIELD MEMBER, A ROTATING ARMATURE MOUNTED ON THE HOLLOW SHAFT, A SEMICONDUCTOR JUNCTION RECTIFIER ASSEMBLY DISPOSED WITHIN THE HOLLOW SHAFT AND ELECTRICALLY CONNECTED BETWEEN THE DIRECT CURRENT FIELD WINDING AND THE ROTATING ARMATURE, AND MEANS FOR SUPPORTING AND ENERGIZING THE RECTIFIERS OF SAID ASSEMBLY IN A CROSSWISE MANNER WITH THE AXIS OF ROTATION PARALLEL TO THE RECTIFYING JUNCTIONS, SAID MEANS FURTHER SUPPORTING THE RECTIFIERS IN AN ANGULARLY SPACED MANNER ABOUT THE AXIAL CENTER OF THE HOLLOW SHAFT SO THAT THE ASSEMBLY IS DYNAMICALLY BALANCED.
Claim 2
Dependent Claim
116 words
A DYNAMOELECTRIC MACHINE HAVING AN ALTERNATING CURRENT WINDING AND A DIRECT CURRENT FIELD WINDING, SAID FIELD WINDING DISPOSED ON A HOLLOW ROTATABLE SHAFT, EXCITING MEANS FOR SAID FIELD WINDING INCLUDING A STATIONARY FIELD MEMBER, A ROTATING ARMATURE MOUNTED ON THE HOLLOW SHAFT, A SEMICONDUCTOR JUNCTION RECTIFIER ASSEMBLY DISPOSED WITHIN THE HOLLOW SHAFT AND ELECTRICALLY CONNECTED BETWEEN THE DIRECT CURRENT FIELD WINDING AND THE ROTATING ARMATURE, AND MEANS FOR SUPPORTING AND ENERGIZING THE RECTIFIERS OF SAID ASSEMBLY IN A CROSSWISE MANNER WITH THE AXIS OF ROTATION PARALLEL TO THE RECTIFYING JUNCTIONS, SAID MEANS FURTHER SUPPORTING THE RECTIFIERS IN AN ANGULARLY SPACED MANNER ABOUT THE AXIAL CENTER OF THE HOLLOW SHAFT SO THAT THE ASSEMBLY IS DYNAMICALLY BALANCED.
References Cited (Backward Citations)
US2832907A
Cited
US2897383A
Cited
US3145314A
Cited
US3348127A
Cited
US3283219A
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US3354330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |