US3280400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for controlling the speed and torque of an induction motor
Assignee: FRIEDA LIPPS
•
Filing: 1963-01-22
•
Granted: 1966-10-18
•
Expires: 1983-01-22
Abstract
No abstract record available.
Inventors
- 👤 Charles C Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:32
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/34; H02K17/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
AN INDUCTION MOTOR HAVING TORQUE VARIABLE AT WILL COMPRISING IN COMBINATION: A ROTOR HAVING AN AXIS, A MAGNETIC CORE ON SAID AXIS AND AN INDUCTION TORQUECREATING WINDING EXTENDING AT LEAST PART OF THE AXIAL LENGTH OF SAID CORE; PAIR OF SUBSTANTIALLY IDENTICAL STATOR UNITS, EACH TELESCOPING OVER A PART OF SAID AXIAL LENGTH OF THE CORE AND EACH, WHEN ENERGIZED, PRODUCING A ROTATING MAGNETIC FIELD OF SUBSTANTIALLY THE SAME INTENSITY AS THE OTHER, HAVING LIKE NUMBERS OF POLES, AND HAVING A LIKE DIRECTION OF ROTATION; MEANS SUPPORTING THE STATOR UNIT, RESPECTIVELY, SAID MEANS PERMITTING INDIVIDUAL ROCKING OF THE STATOR UNITS ABOUT SAID AXIS AND IN OPPOSITE DIRECTIONS FROM A NEUTRAL POSITION WHERE THEIR MAGNETIC FIELDS ARE IN ALIGNED OPPOSED SPACED RELATION TO A SECOND POSITION WHEREIN THEIR MAGNETIC FIELDS ARE IN ALIGNED REINFORCING SPACE RELATION, WHEREBY WITH THE STATOR UNITS IN SAID NEUTRAL POSITION THE EFFECTIVE ROTATING FIELD AS TO SAID ROTOR IS MINIMAL AND WITH STATOR UNITS IN SAID SECOND POSITION THE EFFECTIVE ROTATING FIELD AS TO SAID ROTOR IS MAXIMAL; STOP MEANS EFFECTIVE TO LIMIT ROCKING OF SAID
Claim 2
Dependent Claim
180 words
AN INDUCTION MOTOR HAVING TORQUE VARIABLE AT WILL COMPRISING IN COMBINATION: A ROTOR HAVING AN AXIS, A MAGNETIC CORE ON SAID AXIS AND AN INDUCTION TORQUECREATING WINDING EXTENDING AT LEAST PART OF THE AXIAL LENGTH OF SAID CORE; PAIR OF SUBSTANTIALLY IDENTICAL STATOR UNITS, EACH TELESCOPING OVER A PART OF SAID AXIAL LENGTH OF THE CORE AND EACH, WHEN ENERGIZED, PRODUCING A ROTATING MAGNETIC FIELD OF SUBSTANTIALLY THE SAME INTENSITY AS THE OTHER, HAVING LIKE NUMBERS OF POLES, AND HAVING A LIKE DIRECTION OF ROTATION; MEANS SUPPORTING THE STATOR UNIT, RESPECTIVELY, SAID MEANS PERMITTING INDIVIDUAL ROCKING OF THE STATOR UNITS ABOUT SAID AXIS AND IN OPPOSITE DIRECTIONS FROM A NEUTRAL POSITION WHERE THEIR MAGNETIC FIELDS ARE IN ALIGNED OPPOSED SPACED RELATION TO A SECOND POSITION WHEREIN THEIR MAGNETIC FIELDS ARE IN ALIGNED REINFORCING SPACE RELATION, WHEREBY WITH THE STATOR UNITS IN SAID NEUTRAL POSITION THE EFFECTIVE ROTATING FIELD AS TO SAID ROTOR IS MINIMAL AND WITH STATOR UNITS IN SAID SECOND POSITION THE EFFECTIVE ROTATING FIELD AS TO SAID ROTOR IS MAXIMAL; STOP MEANS EFFECTIVE TO LIMIT ROCKING OF SAID
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |