US3333173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split pole rotor for synchronous motors
Assignee: Individual
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Filing: 1965-02-26
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Granted: 1967-07-25
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Expires: 1985-02-26
Abstract
No abstract record available.
Inventors
- 👤 William E Durrwachter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:42
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/022; H02P25/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A SYNCHRONOUS MOTOR COMPRISING: A STATOR ENERGIZED BY A POLYPHASE CURRENT TO PRODUCE A ROTATING MAGNETIC FIELD; A ROTOR HAVING A PLURALITY OF SPLIT POLES; EACH OF SAID POLES HAVING A FIRST AND SECOND LEG; A BASE FIELD COIL WOUND ABOUT EACH OF SAID POLES AND CONNECTED TOGETHER IN SERIES; A FIRST COIL WOUND ABOUT SAID FIRST LEG OF EACH OF SAID POLES AND CONNECTED TOGETHER IN SERIES; A SECOND COIL WOUND ABOUT SAID SECOND LEG OF EACH OF SAID POLES AND CONNECTED TOGETHER IN SERIES; AND EXCITER MEANS ELECTRICALLY CONNECTED TO SAID BASE FIELD COIL FOR ENERGIZING SAID BASE FIELD COIL TO PRODUCE A FIXED POLARITY AT EACH POLE AND ELECTRICALLY CONNECTED TO SAID FIRST AND SECOND COILS FOR ENERGIZING SAID COILS TO VARY THE FIELD STRENGTH OF SAID COILS WHEREBY THE MAGNETIC CENTER OF SAID SPLIT POLES ARE SHIFTED IN RELATION TO THE ROTATING FIELD OF THE STATOR.
Claim 2
Dependent Claim
150 words
A SYNCHRONOUS MOTOR COMPRISING: A STATOR ENERGIZED BY A POLYPHASE CURRENT TO PRODUCE A ROTATING MAGNETIC FIELD; A ROTOR HAVING A PLURALITY OF SPLIT POLES; EACH OF SAID POLES HAVING A FIRST AND SECOND LEG; A BASE FIELD COIL WOUND ABOUT EACH OF SAID POLES AND CONNECTED TOGETHER IN SERIES; A FIRST COIL WOUND ABOUT SAID FIRST LEG OF EACH OF SAID POLES AND CONNECTED TOGETHER IN SERIES; A SECOND COIL WOUND ABOUT SAID SECOND LEG OF EACH OF SAID POLES AND CONNECTED TOGETHER IN SERIES; AND EXCITER MEANS ELECTRICALLY CONNECTED TO SAID BASE FIELD COIL FOR ENERGIZING SAID BASE FIELD COIL TO PRODUCE A FIXED POLARITY AT EACH POLE AND ELECTRICALLY CONNECTED TO SAID FIRST AND SECOND COILS FOR ENERGIZING SAID COILS TO VARY THE FIELD STRENGTH OF SAID COILS WHEREBY THE MAGNETIC CENTER OF SAID SPLIT POLES ARE SHIFTED IN RELATION TO THE ROTATING FIELD OF THE STATOR.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |