Patent US3187245A successfully refreshed from Google Patents.
US3187245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase motor with plural winding sections
Assignee: McGraw Edison Co
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Filing: 1961-07-20
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Granted: 1965-06-01
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Expires: 1981-07-20
Abstract
No abstract record available.
Inventors
- 👤 Hollis D Sisk
- 👤 Robert F Munier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:42
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A THREE-PHASE MOTOR HAVING P POLES AND INCLUDING A PRIMARY CORE MEMBER PROVIDED WITH A PLURALITY OF SLOTS, A THREE-PHASE WINDING COMPRISING P PHASE POLE GROUPS OF COILS PER PHASE DISPOSED IN SAID SLOTS AND DISTRIBUTED AROUND SAID CORE MEMBER FOR THREE-POHASE OPERATION, SAID WINDING BEING DIVIDED INTO TWO SIMILAR SECTIONS, EACH OF SAID SECTIONS INCLUDING A SELECTED GROUP OF ADJACENT PHASE POLE GROUPS FROM EACH PHASE CONNECTED TOGETHER TO FORM A THREE-PHASE CIRCUIT, SAID SELECTED GROUPS IN THE THREE PHASES IN EACH OF SAID SECTIONS GROUPS IN THE THREE FERENTIALLY OF SAID CORE MEMEBR 60P ELECTRICAL DEGREES APART, MEANS FOR CONNECTING ONE OF SAID SECTIONS TO A SUPPLY SOURCE TO ENERGIZE ALL OF THE COILS IN EACH OF SAID POLE GROUPS IN SAID ONE SECTION FOR STARTING THE MOTOR, AND MEANS FOR CONNECTING THE OTHER OF SAID SECTIONS IN PARALLEL WITH SAID ONE SECTION AFTER THE MOTOR HAS STARTED.
Claim 2
Dependent Claim
151 words
IN A THREE-PHASE MOTOR HAVING P POLES AND INCLUDING A PRIMARY CORE MEMBER PROVIDED WITH A PLURALITY OF SLOTS, A THREE-PHASE WINDING COMPRISING P PHASE POLE GROUPS OF COILS PER PHASE DISPOSED IN SAID SLOTS AND DISTRIBUTED AROUND SAID CORE MEMBER FOR THREE-POHASE OPERATION, SAID WINDING BEING DIVIDED INTO TWO SIMILAR SECTIONS, EACH OF SAID SECTIONS INCLUDING A SELECTED GROUP OF ADJACENT PHASE POLE GROUPS FROM EACH PHASE CONNECTED TOGETHER TO FORM A THREE-PHASE CIRCUIT, SAID SELECTED GROUPS IN THE THREE PHASES IN EACH OF SAID SECTIONS GROUPS IN THE THREE FERENTIALLY OF SAID CORE MEMEBR 60P ELECTRICAL DEGREES APART, MEANS FOR CONNECTING ONE OF SAID SECTIONS TO A SUPPLY SOURCE TO ENERGIZE ALL OF THE COILS IN EACH OF SAID POLE GROUPS IN SAID ONE SECTION FOR STARTING THE MOTOR, AND MEANS FOR CONNECTING THE OTHER OF SAID SECTIONS IN PARALLEL WITH SAID ONE SECTION AFTER THE MOTOR HAS STARTED.
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) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |