Patent US3209184A successfully refreshed from Google Patents.
US3209184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled eddy current coupling
Assignee: Emerson Electric Co
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Filing: 1961-11-27
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Granted: 1965-09-28
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Expires: 1981-11-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard C Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:33
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/043; H02K7/00; H02K7/10; H02K7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN AN EDDY CURRENT COUPLING STRUCTURE: AT LEAST ONE PAIR OF ELEMENTS ADAPTED TO BE MAGNETICALLY COUPLED; MEANS SUPPORTING SAID ELEMENTS FOR ROTATION ABOUT A COMMON AXIS; ONE OF SAID ELEMENTS HAVING AN ANNULAR SURFACE, AND ANOTHER OF SAID ELEMENTS HAVING TEETH OPPOSED TO SAID ANNULAR SURFACE, THERE BEING CHANNELS BETWEEN THE TEETH OPEN AT OPPOSITE ENDS; A NONROTARY COIL SUPPORT; A COIL MOUNTED ON THE SUPPORT; SAID SUPPORT OF MAGNETICALLY PERMEABLE MATERIAL HAVING TWO ANNULAR SURFACES FORMING MAGNETIC FLUX TRANSFER AIR GAPS COOPERABLE WITH THE ELEMENTS, AT LEAST ONE OF SAID ANNULAR AIR GAPS BEING SPACED FROM THE COIL; SAID SUPPORT HAVING AIR VENTILATING OPENINGS EXTENDING THROUGH SAID SUPPORT AND LOCATED BETWEEN THE SIDE ONE OF SAID AIR GAPS AND THE COIL AND COMMUNICATING WITH CORRESPONDING ENDS OF SAID CHANNELS; AND MEANS FOR INDUCING CURRENTS OF AIR THROUGH SAID CHANNELS.
Claim 2
Dependent Claim
141 words
IN AN EDDY CURRENT COUPLING STRUCTURE: AT LEAST ONE PAIR OF ELEMENTS ADAPTED TO BE MAGNETICALLY COUPLED; MEANS SUPPORTING SAID ELEMENTS FOR ROTATION ABOUT A COMMON AXIS; ONE OF SAID ELEMENTS HAVING AN ANNULAR SURFACE, AND ANOTHER OF SAID ELEMENTS HAVING TEETH OPPOSED TO SAID ANNULAR SURFACE, THERE BEING CHANNELS BETWEEN THE TEETH OPEN AT OPPOSITE ENDS; A NONROTARY COIL SUPPORT; A COIL MOUNTED ON THE SUPPORT; SAID SUPPORT OF MAGNETICALLY PERMEABLE MATERIAL HAVING TWO ANNULAR SURFACES FORMING MAGNETIC FLUX TRANSFER AIR GAPS COOPERABLE WITH THE ELEMENTS, AT LEAST ONE OF SAID ANNULAR AIR GAPS BEING SPACED FROM THE COIL; SAID SUPPORT HAVING AIR VENTILATING OPENINGS EXTENDING THROUGH SAID SUPPORT AND LOCATED BETWEEN THE SIDE ONE OF SAID AIR GAPS AND THE COIL AND COMMUNICATING WITH CORRESPONDING ENDS OF SAID CHANNELS; AND MEANS FOR INDUCING CURRENTS OF AIR THROUGH SAID CHANNELS.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |