Patent US3256454A successfully refreshed from Google Patents.
US3256454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper winding for d.c. series motor
Assignee: Ambac International Corp
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Filing: 1963-03-18
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Granted: 1966-06-14
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Sr Robert Martin Redwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:12
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/02; H02K23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A ROTOR ASSEMBLY FOR AN ARMATURE COMPRISING A CORE STRUCTURE, AN ELONGATED FILAMENTARY ELEMENT ON SAID CORE STRUCTURE, SAID FILAMENTARY ELEMENT BEING MADE OF AN ELECTRICALLY CONDUCTIVE MATERIAL AND BEING CROSSED OVER ITSELF AT LEAST AT ONE POINT TO PROVIDE AT LEAST ONE ELECTRICALLY CLOSED LOOP AND AN ARMATURE WINDING WRAPPED AROUND SAID CORE STRUCTURE AND SAID FILAMENTARY ELEMENT TO HOLD THE SAME IN PLACE ON SAID CORE STRUCTURE AND COVERING AT LEAST SAID CROSS OVER POINT.
Claim 2
Dependent Claim
77 words
A ROTOR ASSEMBLY FOR AN ARMATURE COMPRISING A CORE STRUCTURE, AN ELONGATED FILAMENTARY ELEMENT ON SAID CORE STRUCTURE, SAID FILAMENTARY ELEMENT BEING MADE OF AN ELECTRICALLY CONDUCTIVE MATERIAL AND BEING CROSSED OVER ITSELF AT LEAST AT ONE POINT TO PROVIDE AT LEAST ONE ELECTRICALLY CLOSED LOOP AND AN ARMATURE WINDING WRAPPED AROUND SAID CORE STRUCTURE AND SAID FILAMENTARY ELEMENT TO HOLD THE SAME IN PLACE ON SAID CORE STRUCTURE AND COVERING AT LEAST SAID CROSS OVER POINT.
References Cited (Backward Citations)
US1371233A
Cited
US1621937A
Cited
US1743818A
Cited
US1872371A
Cited
US2884549A
Cited
US2971106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |