US3223862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric servo motors
Assignee: Individual
•
Filing: 1961-05-09
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Granted: 1965-12-14
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Expires: 1981-05-09
Abstract
No abstract record available.
Inventors
- 👤 Webb Edward Francis Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:11
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A MOTOR COMPRISING TWO STATOR UNITS WOUND FOR POLYPHASE ALTERNATING CURRENT OPERATION AND CONNECTED TO GENERAGE OPPOSITELY ROTATING FIELDS THROUGH MEANS FOR CONTROLLING THE RELATIVE MAGNITUDE OF THE VOLTAGES APPLIED TO SAID STATORS, TWO WOUND ROTOR UNITS ROTATABLE TOGETHER AND ARRANGED TO COOPERATE ONE WITH EACH OF SAID STATOR UNITS, AND A RECTIFIER BRIDGE INTERCONNECTING SAID TWO ROTOR WINDINGS, WHEREBY THE HIGHEST E.M.F. FROM ANY PHASE WINDING OF ONE ROTOR IS ALWAYS OPPOSED TO THE HIGHEST E.M.F. GENERATED IN ANY PHASE WINDING OF THE SECOND ROTOR.
Claim 2
Dependent Claim
86 words
A MOTOR COMPRISING TWO STATOR UNITS WOUND FOR POLYPHASE ALTERNATING CURRENT OPERATION AND CONNECTED TO GENERAGE OPPOSITELY ROTATING FIELDS THROUGH MEANS FOR CONTROLLING THE RELATIVE MAGNITUDE OF THE VOLTAGES APPLIED TO SAID STATORS, TWO WOUND ROTOR UNITS ROTATABLE TOGETHER AND ARRANGED TO COOPERATE ONE WITH EACH OF SAID STATOR UNITS, AND A RECTIFIER BRIDGE INTERCONNECTING SAID TWO ROTOR WINDINGS, WHEREBY THE HIGHEST E.M.F. FROM ANY PHASE WINDING OF ONE ROTOR IS ALWAYS OPPOSED TO THE HIGHEST E.M.F. GENERATED IN ANY PHASE WINDING OF THE SECOND ROTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |