US3142773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor protection means
Assignee: Robertshaw US Holding Corp
•
Filing: 1961-01-19
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Granted: 1964-07-28
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Expires: 1981-01-19
Abstract
No abstract record available.
Inventors
- 👤 Philip H Snoberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:03
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/36; H02; H02K; H02K11/00; H02K11/20; H02K11/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN ELECTRIC MOTOR HAVING ROTOR MEANS AND STATOR MEANS, SAID STATOR MEANS COMPRISING: A POLE STRUCTURE HAVING WINDING SLOTS, A FIELD WINDING COMPRISING A PLURALITY OF TURNS OF A CONTINUOUS WIRE HAVING A MULTIPLICITY OF COEXTENDING CLOSELY GROUPED SEGMENTS DISPOSED IN SAID WINDING SLOTS TO FORM A MAGNETIC FIELD FOR SAID ROTOR MEANS, A SWITCH FOR CONTROLLING ENERGIZATION OF SAID WINDING, AN EXPANSIBLE ELEMENT FOR OPERATING SAID SWITCH, ONE OF SAID WINDING SEGMENTS BEING DISPOSED IN SAID GROUP OF SEGMENTS IN SAID SLOT AND COMPRISING AN ELECTRICALLY CONDUCTIVE METALLIC TUBULAR MEMBER ONE END OF WHICH IS IN COMMUNICATION WITH SAID EXPANSIBLE ELEMENT AND THE OTHER END OF WHICH IS CLOSED, SAID TUBULAR MEMBER BEING IN CLOSE HEAT CONDUCTIVE RELATION WITH ADJACENT SEGMENTS OF SAID GROUP, A THERMALLY ESPANSIBLE FLUID CONTAINED IN
Claim 2
Dependent Claim
131 words
AN ELECTRIC MOTOR HAVING ROTOR MEANS AND STATOR MEANS, SAID STATOR MEANS COMPRISING: A POLE STRUCTURE HAVING WINDING SLOTS, A FIELD WINDING COMPRISING A PLURALITY OF TURNS OF A CONTINUOUS WIRE HAVING A MULTIPLICITY OF COEXTENDING CLOSELY GROUPED SEGMENTS DISPOSED IN SAID WINDING SLOTS TO FORM A MAGNETIC FIELD FOR SAID ROTOR MEANS, A SWITCH FOR CONTROLLING ENERGIZATION OF SAID WINDING, AN EXPANSIBLE ELEMENT FOR OPERATING SAID SWITCH, ONE OF SAID WINDING SEGMENTS BEING DISPOSED IN SAID GROUP OF SEGMENTS IN SAID SLOT AND COMPRISING AN ELECTRICALLY CONDUCTIVE METALLIC TUBULAR MEMBER ONE END OF WHICH IS IN COMMUNICATION WITH SAID EXPANSIBLE ELEMENT AND THE OTHER END OF WHICH IS CLOSED, SAID TUBULAR MEMBER BEING IN CLOSE HEAT CONDUCTIVE RELATION WITH ADJACENT SEGMENTS OF SAID GROUP, A THERMALLY ESPANSIBLE FLUID CONTAINED IN
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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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |