Patent US3308363A successfully refreshed from Google Patents.
US3308363A
Expired / Lapsed
US
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Pole-changing, three-phase, alternating current motor or generator for three pole-numbers
Assignee: National Research Development Corp UK
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Filing: 1963-04-05
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Granted: 1967-03-07
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Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Rawcliffe Gordon Hindle
- 👤 Fong William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:45
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/28; H02K17/00; H02K17/02; H02K17/12; H02K17/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ALTERNATING CURRENT POLE-CHANGING ROTARY ELECTRIC MACHINE FOR THREE-PHASE RUNNING AT THREE ALTERNATIVE POLENUMBERS RELATED TO ONE ANOTHER IN THAT, WHERE ONE POLENUMBER IS X-POLES, A SECOND IS A POLE-NUMBER SELECTED FROM THE SERIES: (X+2), (X+6), (X+10) AND SO FORTH, AND THE THIRD IS A POLE-NUMBER SELECTED FROM THE SERIES: (X+4), (X+8), (X+12) AND SO FORTH, HAVING THREE PHASE-WINDINGS COMPRISING COILS WOUND IN SLOTS AND SERIALLY CONNECTED TOGETHER IN FOUR WINDING SECTIONS IN EACH PHASE-WINDING DEFINED BY CONNECTING TAPS, TO PROVIDE ONE OF SAID SECOND AND THIRD POLE-NUMBERS, BEING RECONNECTED AT SAID TAPS AS A SERIES-PARALLEL ARRANGEMENT OF TWO PARALLEL CIRCUITS EACH OF TWO SAID SECTIONS, TO PROVIDE THE OTHER ONE OF SAID SECOND AND THIRD POLE-NUMBERS AND BEING RECONNECTED AT SAID TAPS AS A FOUR-PARALLEL ARRANGEMENT, EACH OF ONE SAID SECTION, TO PROVIDE SAID POLENUMBER OF X-POLES.
Claim 2
Dependent Claim
138 words
AN ALTERNATING CURRENT POLE-CHANGING ROTARY ELECTRIC MACHINE FOR THREE-PHASE RUNNING AT THREE ALTERNATIVE POLENUMBERS RELATED TO ONE ANOTHER IN THAT, WHERE ONE POLENUMBER IS X-POLES, A SECOND IS A POLE-NUMBER SELECTED FROM THE SERIES: (X+2), (X+6), (X+10) AND SO FORTH, AND THE THIRD IS A POLE-NUMBER SELECTED FROM THE SERIES: (X+4), (X+8), (X+12) AND SO FORTH, HAVING THREE PHASE-WINDINGS COMPRISING COILS WOUND IN SLOTS AND SERIALLY CONNECTED TOGETHER IN FOUR WINDING SECTIONS IN EACH PHASE-WINDING DEFINED BY CONNECTING TAPS, TO PROVIDE ONE OF SAID SECOND AND THIRD POLE-NUMBERS, BEING RECONNECTED AT SAID TAPS AS A SERIES-PARALLEL ARRANGEMENT OF TWO PARALLEL CIRCUITS EACH OF TWO SAID SECTIONS, TO PROVIDE THE OTHER ONE OF SAID SECOND AND THIRD POLE-NUMBERS AND BEING RECONNECTED AT SAID TAPS AS A FOUR-PARALLEL ARRANGEMENT, EACH OF ONE SAID SECTION, TO PROVIDE SAID POLENUMBER OF X-POLES.
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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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |