US3127532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid pole for self-starting synchronous motors
Assignee: ABB Norden Holding AB
•
Filing: 1961-05-08
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Granted: 1964-03-31
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Gynt Sven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:50
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
SOLID SALIENT POLE PIECE FOR THE FIELD MAGNET OF A SELF-STARTING SYNCHRONOUS MOTOR, SAID POLE HAVING A NUMBER OF SLOTS ON THE POLE FACE, SAID SLOTS BEING SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF ROTATION, THE DEPTH OF SAID SLOTS BEING AT LEAST AS GREAT AS HALF THE MAXIMUM RADIAL THICKNESS OF THE POLE PIECE AND NON-MAGNETIC ELECTRICALLY NON-CONDUCTING MATERIAL SUBSTANTIALLY FILLING SAID SLOTS.
Claim 2
Dependent Claim
63 words
SOLID SALIENT POLE PIECE FOR THE FIELD MAGNET OF A SELF-STARTING SYNCHRONOUS MOTOR, SAID POLE HAVING A NUMBER OF SLOTS ON THE POLE FACE, SAID SLOTS BEING SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF ROTATION, THE DEPTH OF SAID SLOTS BEING AT LEAST AS GREAT AS HALF THE MAXIMUM RADIAL THICKNESS OF THE POLE PIECE AND NON-MAGNETIC ELECTRICALLY NON-CONDUCTING MATERIAL SUBSTANTIALLY FILLING SAID SLOTS.
References Cited (Backward Citations)
US422681A
Cited
US2733362A
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US1449577A
Cited
US1957551A
Cited
US2300520A
Cited
US2470522A
Cited
US2989655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |