Patent US3217231A successfully refreshed from Google Patents.
US3217231A
Expired / Lapsed
US
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Low ripple rectifier
Assignee: Individual
•
Filing: 1960-12-06
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Granted: 1965-11-09
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Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 Edward T Duncan
- 👤 George L Krize
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:30
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A LOW RIPPLE RECTIFIER CIRCUIT COMPRISING A VARIABLE AUTO-TRANSFORMER, MEANS FOR CONNECTING THE PRIMARY OF THIS TRANSFORMER TO A THREE-PHASE SUPPLY CIRCUIT, A POWER TRANSFORMER HAVING A DELTA CONNECTED PRIMARY CONNECTED TO THE SECONDARY OF THE AUTO-TRANSFORMER, SAID POWER TRANSFORMER HAVING A DUAL WOUND SECONDARY OF WHICH ONE COMPONENT COMPRISES THREE WINDINGS CONNECTED IN DELTA AND THE OTHER COMPONENT THREE WINDINGS CONNECTED IN WYE, ONE WINDING OF EACH COMPONENT HAVING A VOLTAGE OUTPUT IN PHASE WITH THAT OF A WINDING OF THE OTHER COMPONENT, THE LINE-TO-LINE OUTPUT VOLGATE OF THE DELTA CONNECTED WINDINGS BEING EQUAL TO THE LINE-TO-LINE OUTPUT VOLTAGE OF THE WYE CONNECTED WINDINGS, SAID WINDINGS OF THE DUAL WOUND SECONDARY BEING WOUND SIDE BY SIDE WITH THE INDIVIDUAL TURNS OF EACH DELTA WINDING ALTERNATING WITH THE INDIVIDUAL TURNS OF A WYE WINDING, A THREE-PHASE BRIDGE RECTIFIER MEANS CONNECTED TO THE DELTA AND WYE WINDINGS OF THE POWER TRANSFORMER SECONDARY, AND MEANS FOR CONNECTING THE OUTPUT FROM THE BRIDGE RECTIFIER MEANS TO A LOAD CIRCUIT.
Claim 2
Dependent Claim
166 words
A LOW RIPPLE RECTIFIER CIRCUIT COMPRISING A VARIABLE AUTO-TRANSFORMER, MEANS FOR CONNECTING THE PRIMARY OF THIS TRANSFORMER TO A THREE-PHASE SUPPLY CIRCUIT, A POWER TRANSFORMER HAVING A DELTA CONNECTED PRIMARY CONNECTED TO THE SECONDARY OF THE AUTO-TRANSFORMER, SAID POWER TRANSFORMER HAVING A DUAL WOUND SECONDARY OF WHICH ONE COMPONENT COMPRISES THREE WINDINGS CONNECTED IN DELTA AND THE OTHER COMPONENT THREE WINDINGS CONNECTED IN WYE, ONE WINDING OF EACH COMPONENT HAVING A VOLTAGE OUTPUT IN PHASE WITH THAT OF A WINDING OF THE OTHER COMPONENT, THE LINE-TO-LINE OUTPUT VOLGATE OF THE DELTA CONNECTED WINDINGS BEING EQUAL TO THE LINE-TO-LINE OUTPUT VOLTAGE OF THE WYE CONNECTED WINDINGS, SAID WINDINGS OF THE DUAL WOUND SECONDARY BEING WOUND SIDE BY SIDE WITH THE INDIVIDUAL TURNS OF EACH DELTA WINDING ALTERNATING WITH THE INDIVIDUAL TURNS OF A WYE WINDING, A THREE-PHASE BRIDGE RECTIFIER MEANS CONNECTED TO THE DELTA AND WYE WINDINGS OF THE POWER TRANSFORMER SECONDARY, AND MEANS FOR CONNECTING THE OUTPUT FROM THE BRIDGE RECTIFIER MEANS TO A LOAD CIRCUIT.
References Cited (Backward Citations)
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |