US3079532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection device for reverse polarity in d.-c. generators
Assignee: Individual
•
Filing: 1959-09-25
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Granted: 1963-02-26
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Expires: 1979-09-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Segrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
H; H02; H02H; H02H11/00; H02H11/002; H02P; H02P9/00; H02P9/10; H02P9/12; H02P9/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
AN OVERVOLTAGE PROTECTION DEVICE FOR A DIRECT CURRENT GENERATOR SYSTEM COMPRISING, A SOURCE OF DIRECT VOLTAGE, A RELAY HAVING A POLARITY SENSITIVE AND RESPONSIVE COIL ADAPTED TO OPERATE A SWITCH WHEN ELECTRICALLY ENERGIZED, A CALIBRATING RESISTANCE, FIRST DIODE MEANS, SECOND DIODE MEANS, AND THIRD DIODE MEANS, EACH OF SAID DIODE MEANS BEING HIGHLY RESISTIVE TO THE PASSAGE OF CURRENT IN ONE DIRECTION THERETHROUGH, SAID CALIBRATING RESISTANCE, SAID COIL, AND SAID FIRST DIODE MEANS BEING RESPECTIVELY SERIESCONNECTED TO SAID SOURCE TO CONDUCT CURRENT IN ONE DIRECTION THROUGH SAID COIL DURING A NORMAL ELECTRICAL POLARITY CONDITION AND TO OPERATE THE SWITCH WHEN AN OVERVOLTAGE OCCURS, THE OVERVOLTAGE LEVEL BEING DETERMINED BY THE ADJUSTMENT OF SAID CALIBRATING RESISTANCE, SAID SECOND DIODE MEANS, SAID COIL, SAID THIRD DIODE MEANS BEING RESPECTIVELY SERIES-CONNECTED TO CONDUCT CURRENT IN SAID ONE DIRECTION THROUGH SAID COIL AND BYPASS SAID CALIBRATING RESISTANCE AND SAID FIRST DIODE MEANS DURING THE OCCURRENCE OF REVERSED ELECTRICAL POLARITY, SAID SECOND DIODE MEANS AND SAID THIRD DIODE MEANS THEREBY BYPASSING SAID CALIBRATING RESISTANCE DURING THE OCCURRENCE OF THE REVERSED POLARITY FOR CAUSING THE OPERATION OF THE SWITCH AT A LOWER VOLTAGE THAN PERMISSIBLE DURING THE NORMAL ELECTRICAL POLARITY CONDITION.
Claim 2
Dependent Claim
195 words
AN OVERVOLTAGE PROTECTION DEVICE FOR A DIRECT CURRENT GENERATOR SYSTEM COMPRISING, A SOURCE OF DIRECT VOLTAGE, A RELAY HAVING A POLARITY SENSITIVE AND RESPONSIVE COIL ADAPTED TO OPERATE A SWITCH WHEN ELECTRICALLY ENERGIZED, A CALIBRATING RESISTANCE, FIRST DIODE MEANS, SECOND DIODE MEANS, AND THIRD DIODE MEANS, EACH OF SAID DIODE MEANS BEING HIGHLY RESISTIVE TO THE PASSAGE OF CURRENT IN ONE DIRECTION THERETHROUGH, SAID CALIBRATING RESISTANCE, SAID COIL, AND SAID FIRST DIODE MEANS BEING RESPECTIVELY SERIESCONNECTED TO SAID SOURCE TO CONDUCT CURRENT IN ONE DIRECTION THROUGH SAID COIL DURING A NORMAL ELECTRICAL POLARITY CONDITION AND TO OPERATE THE SWITCH WHEN AN OVERVOLTAGE OCCURS, THE OVERVOLTAGE LEVEL BEING DETERMINED BY THE ADJUSTMENT OF SAID CALIBRATING RESISTANCE, SAID SECOND DIODE MEANS, SAID COIL, SAID THIRD DIODE MEANS BEING RESPECTIVELY SERIES-CONNECTED TO CONDUCT CURRENT IN SAID ONE DIRECTION THROUGH SAID COIL AND BYPASS SAID CALIBRATING RESISTANCE AND SAID FIRST DIODE MEANS DURING THE OCCURRENCE OF REVERSED ELECTRICAL POLARITY, SAID SECOND DIODE MEANS AND SAID THIRD DIODE MEANS THEREBY BYPASSING SAID CALIBRATING RESISTANCE DURING THE OCCURRENCE OF THE REVERSED POLARITY FOR CAUSING THE OPERATION OF THE SWITCH AT A LOWER VOLTAGE THAN PERMISSIBLE DURING THE NORMAL ELECTRICAL POLARITY CONDITION.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |