US3387202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary phase converter system
Assignee: Individual
•
Filing: 1966-08-25
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Granted: 1968-06-04
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 James F Buffington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:54
CPC Classifications
H; H02; H02K; H02K47/00; H02K47/18; H02K47/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A ROTARY PHASE CONVERTER SYSTEM FOR CONVERTING A SINGLE-PHASE INPUT TO A THREE-PHASE OUTPUT, COMPRISING A STARTING MOTOR-TRANSFORMER HAVING THREE WINDINGS AND A PHASE CONVERTER TRANSFORMER HAVING THREE WINDINGS AND BEING CONNECTED TO AND DRIVEN BY SAID STARTING MOTORTRANSFORMER, A SINGLE-PHASE INPUT HAVING TWO TERMINALS, A THREE-PHASE OUTPUT HAVINGS THREE TERMINALS, LEAD CONNECTING SAID INPUT TERMINALS WITH TWO OF SAID OUTPUT TERMINALS, LEADS CONNECTING SAID INPUT TERMINALS WITH TWO OF THE WINDINGS OF SAID STARTING MOTOR-TRANSFORMER, LEADS CONNECTING SAID INPUT TERMINALS WITH TWO OF THE WINDINGS OF SAID PHASE CONVERTER TRANSFORMER, A RELAY MEANS CONTROLLING THE CURRENT THROUGH SAID LAST TWO LEADS, A RELAY RESPONSIVE TO THE OPERATION OF SAID STARTING MOTOR-TRANSFORMER FOR CONTROLLING SAID RELAY MEANS, A LEAD MEANS CONNECTING THE THIRD WINDING OF EACH OF SAID TRANSFORMERS TOGETHER AND TO THE THIRD TERMINAL OF SAID THREE-PHASE OUTPUT, AND A CAPACITOR CONNECTED TO SAID LEAD MEANS AND TO ONE OF SAID FIRST TWO MENTIONED LEADS.
Claim 2
Dependent Claim
156 words
A ROTARY PHASE CONVERTER SYSTEM FOR CONVERTING A SINGLE-PHASE INPUT TO A THREE-PHASE OUTPUT, COMPRISING A STARTING MOTOR-TRANSFORMER HAVING THREE WINDINGS AND A PHASE CONVERTER TRANSFORMER HAVING THREE WINDINGS AND BEING CONNECTED TO AND DRIVEN BY SAID STARTING MOTORTRANSFORMER, A SINGLE-PHASE INPUT HAVING TWO TERMINALS, A THREE-PHASE OUTPUT HAVINGS THREE TERMINALS, LEAD CONNECTING SAID INPUT TERMINALS WITH TWO OF SAID OUTPUT TERMINALS, LEADS CONNECTING SAID INPUT TERMINALS WITH TWO OF THE WINDINGS OF SAID STARTING MOTOR-TRANSFORMER, LEADS CONNECTING SAID INPUT TERMINALS WITH TWO OF THE WINDINGS OF SAID PHASE CONVERTER TRANSFORMER, A RELAY MEANS CONTROLLING THE CURRENT THROUGH SAID LAST TWO LEADS, A RELAY RESPONSIVE TO THE OPERATION OF SAID STARTING MOTOR-TRANSFORMER FOR CONTROLLING SAID RELAY MEANS, A LEAD MEANS CONNECTING THE THIRD WINDING OF EACH OF SAID TRANSFORMERS TOGETHER AND TO THE THIRD TERMINAL OF SAID THREE-PHASE OUTPUT, AND A CAPACITOR CONNECTED TO SAID LEAD MEANS AND TO ONE OF SAID FIRST TWO MENTIONED LEADS.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |