Patent US3211914A successfully refreshed from Google Patents.
US3211914A
Expired / Lapsed
US
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Electric power transmission system
Assignee: General Electric Co
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Filing: 1961-10-09
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Granted: 1965-10-12
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Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 John G Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:07
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A THREE PHASE ELECTRIC POWER TRANSMISSION SYSTEM COMPRISING, IN COMBINATION, A SENDING STATION HAVING A VOLTAGE STEP-UP POWER TRANSFORMER WITH A Y CONNECTED HIGH VOLTAGE SECONDARY WINDING, A RECEIVING STATION WITH A VOLTAGE STEP-DOWN POWER TRANSFORMER HAVING A Y CONNECTED HIGH VOLTAGE PRIMARY WINDING, A HIGH VOLTAGE TRANSMISSION LINE HAVING THREE LINE CONDUCTORS RESPECTIVELY INTERCONNECTING CORRESPONDING PHASES OF SAID HIGH VOLTAGE WINDINGS, MEANS FOR INSERTING A SINGLE PHASE ALTERNATING VOLTAGE BETWEEN THE NEUTRAL POINT OF AT LEAST ONE OF SAID Y CONNECTED WINDINGS AND GROUND OF A FREQUENCY TRIPLE THE FREQUENCY OF THE FUNDAMENTAL FREQUENCY OF SAID SYSTEMS AND OF AN AMPLITUDE NO GREATER THAN ABOUT ONE-FOURTH THE AMPLITUDE OF THE PHASE VOLTAGES OF SAID HIGH VOLTAGE WINDINGS, THE PHASE OF SAID TRIPLE FREQUENCY VOLTAGE RELATIVE TO THE INDIVIDUAL PHASE VOLTAGES OF SAID HIGH VOLTAGE WINDINGS BEING SUCH THAT IT IS IN PHASE OPPOSITION TO THE LATTER WHEN THEY ARE AT THEIR MAXIMUM VALUES, AND AN IMPEDANCE CONNECTED BETWEEN THE NEUTRAL POINT OF THE OTHER Y CONNECTED WINDING AND GROUND.
Claim 2
Dependent Claim
170 words
A THREE PHASE ELECTRIC POWER TRANSMISSION SYSTEM COMPRISING, IN COMBINATION, A SENDING STATION HAVING A VOLTAGE STEP-UP POWER TRANSFORMER WITH A Y CONNECTED HIGH VOLTAGE SECONDARY WINDING, A RECEIVING STATION WITH A VOLTAGE STEP-DOWN POWER TRANSFORMER HAVING A Y CONNECTED HIGH VOLTAGE PRIMARY WINDING, A HIGH VOLTAGE TRANSMISSION LINE HAVING THREE LINE CONDUCTORS RESPECTIVELY INTERCONNECTING CORRESPONDING PHASES OF SAID HIGH VOLTAGE WINDINGS, MEANS FOR INSERTING A SINGLE PHASE ALTERNATING VOLTAGE BETWEEN THE NEUTRAL POINT OF AT LEAST ONE OF SAID Y CONNECTED WINDINGS AND GROUND OF A FREQUENCY TRIPLE THE FREQUENCY OF THE FUNDAMENTAL FREQUENCY OF SAID SYSTEMS AND OF AN AMPLITUDE NO GREATER THAN ABOUT ONE-FOURTH THE AMPLITUDE OF THE PHASE VOLTAGES OF SAID HIGH VOLTAGE WINDINGS, THE PHASE OF SAID TRIPLE FREQUENCY VOLTAGE RELATIVE TO THE INDIVIDUAL PHASE VOLTAGES OF SAID HIGH VOLTAGE WINDINGS BEING SUCH THAT IT IS IN PHASE OPPOSITION TO THE LATTER WHEN THEY ARE AT THEIR MAXIMUM VALUES, AND AN IMPEDANCE CONNECTED BETWEEN THE NEUTRAL POINT OF THE OTHER Y CONNECTED WINDING AND GROUND.
References Cited (Backward Citations)
US1363707A
Cited
US2745991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |