US3132272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamo-electric machines
Assignee: MACFARLANE ENGINEERING Co
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Filing: 1960-11-21
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Granted: 1964-05-05
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Expires: 1980-11-21
Abstract
No abstract record available.
Inventors
- 👤 William I Macfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:03
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/22; H02K19/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A DYNAMO-ELECTRIC MACHINE, COMPRISING FIELD POLE SHOES ROTATABLE ABOUT THE MACHINE AXIS, A DRIVING ELEMENT FOR ROTATING THE POLE SHOES, A WOUND STATOR OPPOSITE THE POLE PIECES ON ONE SIDE THEREOF AND CO-OPERATING ELECTROMAGNETICALLY THEREWITH AND STATIONARY FIELD COILS OPPOSITE THE POLE PIECES ON THE OTHER SIDE THEREOF AND FOR EXCITING SAME, MAGNETIC POLE PARTS RISING ALTERNATELY ON OPPOSITE SIDES OF THE FIELD COILS AND CARRYING THE POLE SHOES, ALTERNATE POLE SHOES EXTENDING ACROSS IN OPPOSITE DIRECTIONS BETWEEN THE FIELD COILS AND THE STATOR, AND NON MAGNETIC MATERIAL UNITING THE RESPECTIVE SHOE TIPS ON EACH SIDE WITH THE ROOTS OF THE ADJACENT ALTERNATE POLES, SO THAT THE WHOLE POLE ASSEMBLY MAY BE DRIVEN THROUGH ONE SIDE THEREOF.
Claim 2
Dependent Claim
117 words
A DYNAMO-ELECTRIC MACHINE, COMPRISING FIELD POLE SHOES ROTATABLE ABOUT THE MACHINE AXIS, A DRIVING ELEMENT FOR ROTATING THE POLE SHOES, A WOUND STATOR OPPOSITE THE POLE PIECES ON ONE SIDE THEREOF AND CO-OPERATING ELECTROMAGNETICALLY THEREWITH AND STATIONARY FIELD COILS OPPOSITE THE POLE PIECES ON THE OTHER SIDE THEREOF AND FOR EXCITING SAME, MAGNETIC POLE PARTS RISING ALTERNATELY ON OPPOSITE SIDES OF THE FIELD COILS AND CARRYING THE POLE SHOES, ALTERNATE POLE SHOES EXTENDING ACROSS IN OPPOSITE DIRECTIONS BETWEEN THE FIELD COILS AND THE STATOR, AND NON MAGNETIC MATERIAL UNITING THE RESPECTIVE SHOE TIPS ON EACH SIDE WITH THE ROOTS OF THE ADJACENT ALTERNATE POLES, SO THAT THE WHOLE POLE ASSEMBLY MAY BE DRIVEN THROUGH ONE SIDE THEREOF.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |