Patent US3178630A successfully refreshed from Google Patents.
US3178630A
Expired / Lapsed
US
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Constant frequency alternating current system
Assignee: Westinghouse Electric Corp
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Filing: 1960-09-12
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Granted: 1965-04-13
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Expires: 1980-09-12
Abstract
No abstract record available.
Inventors
- 👤 Ralph D Jessee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:50
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/27; H02M5/271
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN ALTERNATING CURRENT POWER SYSTEM COMPRISING A POLYPHASE SOURCE OF ALTERNATING CURRENT PROVIDING A PLURALITY OF SETS OF POLYPHASE VOLTAGES HAVING A FIXED PHASE DIFFERENCE, A SET OF OUTPUT LEADS FOR EACH OF SAID SETS OF POLYPHASE VOLTAGES, BILATERALLY CONDUCTIVE SWITCHING MEANS FOR CONNECTING EACH LEAD OF EACH OF SAID SETS OF OUTPUT LEADS TO EACH OF THE CORRESPONDING SET OF POLYPHASE VOLTAGES IN SUCCESSION IN A PREDETERMINED SEQUENCE AND AT A SWITCHING FREQUENCY HAVING A PREDETERMINED RELATION TO THE FREQUENCY OF A SOURCE, THE SWITCHING TIMES OF THE DIFFERENT SETS OF LEADS DIFFERING BY A TIME INTERVAL EQUIVALENT TO SAID PHASE DIFFERENCE BETWEEN THE SETS OF POLYPHASE VOLTAGES, AND IMPEDANCE MEANS CONNECTED TO SAID OUTPUT LEADS FOR COMBINING THE VOLTAGES OF CORRESPONDING LEADS OF THE DIFFERENT SETS OF OUTPUT LEADS.
Claim 2
Dependent Claim
131 words
AN ALTERNATING CURRENT POWER SYSTEM COMPRISING A POLYPHASE SOURCE OF ALTERNATING CURRENT PROVIDING A PLURALITY OF SETS OF POLYPHASE VOLTAGES HAVING A FIXED PHASE DIFFERENCE, A SET OF OUTPUT LEADS FOR EACH OF SAID SETS OF POLYPHASE VOLTAGES, BILATERALLY CONDUCTIVE SWITCHING MEANS FOR CONNECTING EACH LEAD OF EACH OF SAID SETS OF OUTPUT LEADS TO EACH OF THE CORRESPONDING SET OF POLYPHASE VOLTAGES IN SUCCESSION IN A PREDETERMINED SEQUENCE AND AT A SWITCHING FREQUENCY HAVING A PREDETERMINED RELATION TO THE FREQUENCY OF A SOURCE, THE SWITCHING TIMES OF THE DIFFERENT SETS OF LEADS DIFFERING BY A TIME INTERVAL EQUIVALENT TO SAID PHASE DIFFERENCE BETWEEN THE SETS OF POLYPHASE VOLTAGES, AND IMPEDANCE MEANS CONNECTED TO SAID OUTPUT LEADS FOR COMBINING THE VOLTAGES OF CORRESPONDING LEADS OF THE DIFFERENT SETS OF OUTPUT 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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |