US3219856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor thermal protection system
Assignee: General Electric Co
•
Filing: 1962-10-23
•
Granted: 1965-11-23
•
Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Dunwiddie
- 👤 Warren N Mccroskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:00
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/20; H02K11/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A DYNAMOLECTRIC MACHINE COMPRISING A MAGNETIC CORE HAVING SLOTS AND AT LEAST ONE WINDING THEREIN INCLUDING CONDUCTORS HAVING END TURNS PROJECTING FROM OPPOSITE ENDS OF THE CORE, A TEMPERATURE RESPONSIVE DEVICE MOUNTED ON END TURNS OF SAID WINDING AND BEING IN CONDUCTIVE HEAT EXCHANGE RELATIONSHIP THEREWITH, SAID DEVICE INCLUDING BIMETALLIC ELEMENTS CONNECTED WITH A SWITCH, LEADS CONNECTING SAID SWITCH WITH MEANS SUPPLYING POWER TO SAID WINDING, A COIL WOUND ON SAID DEVICE, SAID COIL BEING CONNECTED IN SERIES WITH A CONDUCTOR IN SAID WINDING, AND THERMAL INSULATION MEANS SHIELDING SAID COIL FROM THE INFLUENCE OF ANY COOLING MEDIUM FLOWING IN THE VICINITY OF SAID WINDING, SO THAT WHEN THE WINDING HEATS FROM AN OVER-TEMPERATURE CONDITION, THE BIMETALLIC ELEMENTS RESPOND TO THE COMBINED INFLUENCES OF HEAT FROM THE WINDING AND FROM SAID COIL AND OPERATE TO OPEN SAID SWITCH AND INTERRUPT POWER SUPPLIED TO THE WINDING.
Claim 2
Dependent Claim
145 words
A DYNAMOLECTRIC MACHINE COMPRISING A MAGNETIC CORE HAVING SLOTS AND AT LEAST ONE WINDING THEREIN INCLUDING CONDUCTORS HAVING END TURNS PROJECTING FROM OPPOSITE ENDS OF THE CORE, A TEMPERATURE RESPONSIVE DEVICE MOUNTED ON END TURNS OF SAID WINDING AND BEING IN CONDUCTIVE HEAT EXCHANGE RELATIONSHIP THEREWITH, SAID DEVICE INCLUDING BIMETALLIC ELEMENTS CONNECTED WITH A SWITCH, LEADS CONNECTING SAID SWITCH WITH MEANS SUPPLYING POWER TO SAID WINDING, A COIL WOUND ON SAID DEVICE, SAID COIL BEING CONNECTED IN SERIES WITH A CONDUCTOR IN SAID WINDING, AND THERMAL INSULATION MEANS SHIELDING SAID COIL FROM THE INFLUENCE OF ANY COOLING MEDIUM FLOWING IN THE VICINITY OF SAID WINDING, SO THAT WHEN THE WINDING HEATS FROM AN OVER-TEMPERATURE CONDITION, THE BIMETALLIC ELEMENTS RESPOND TO THE COMBINED INFLUENCES OF HEAT FROM THE WINDING AND FROM SAID COIL AND OPERATE TO OPEN SAID SWITCH AND INTERRUPT POWER SUPPLIED TO THE WINDING.
References Cited (Backward Citations)
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Cited
US2707763A
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US2758255A
Cited
US2662203A
Cited
US2782353A
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US3023350A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |