US3421062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical polyphase machine having stator and rotor windings connected in series to polyphase supply
Assignee: TECHNICAL MATERIAL CORP
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Filing: 1964-07-28
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Granted: 1969-01-07
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Expires: 1984-07-28
Abstract
No abstract record available.
Inventors
- 👤 Richard K Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/22; H02K17/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A DOUBLY FED ALTERNATING CURRENT MACHINE OF THE SYNCHRONOUS-INDUCTION KIND, THE COMBINATION OF A ROTOR HAVING A SINGLE PRIMARY INDUCTOR WINDING, A STATOR HAVING A SINGLE SECONDARY INDUCTOR WINDING, MEANS TO CONNECT SAID WINDINGS IN EFFECTIVE SERIES RELATION TO AN ALTERNATING CURRENT LINE; AND VOLTAGE STORING MEANS CONNECTED TO SAID SERIES CONNECTED WINDINGS AND CORRELATED WITH THE LEAKAGE REACTANCE TO MAINTAIN EXCITATION OF THE MACHINE AFTER STARTING THEREOF.
Claim 2
Dependent Claim
69 words
IN A DOUBLY FED ALTERNATING CURRENT MACHINE OF THE SYNCHRONOUS-INDUCTION KIND, THE COMBINATION OF A ROTOR HAVING A SINGLE PRIMARY INDUCTOR WINDING, A STATOR HAVING A SINGLE SECONDARY INDUCTOR WINDING, MEANS TO CONNECT SAID WINDINGS IN EFFECTIVE SERIES RELATION TO AN ALTERNATING CURRENT LINE; AND VOLTAGE STORING MEANS CONNECTED TO SAID SERIES CONNECTED WINDINGS AND CORRELATED WITH THE LEAKAGE REACTANCE TO MAINTAIN EXCITATION OF THE MACHINE AFTER STARTING THEREOF.
References Cited (Backward Citations)
US2084178A
Cited
US3014142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |