US3110844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open and reverse phase protective system for polyphase electric apparatus
Assignee: General Electric Co
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Filing: 1959-09-29
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Granted: 1963-11-12
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Expires: 1979-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas F Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:37
CPC Classifications
H; H02; H02H; H02H11/00; H02H11/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A PROTECTIVE SYSTEM FOR ALTERNATING-CURRENT LOAD APPARATUS ENERGIZED BY POLYPHASE ELECTRIC POWER FROM A 3WIRE ELECTRIC POWER LINE, COMPRISING: AN ELECTRIC CIRCUIT INTERRUPTER ADAPTED TO BE CONNECTED BETWEEN THE LOAD APPARATUS AND SAID LINE, THE CIRCUIT INTERRUPTER BEING EQUIPPED WITH AN UNDERVOLTAGE DEVICE FOR EFFECTING, WHEN DEENERGIZED, AN INTERRUPTION IN THE SUPPLY OF ELECTRIC POWER TO SAID APPARATUS; CIRCUIT MEANS FOR CONNECTING THE UNDERVOLTAGE DEVICE FOR ENERGIZATION BY LINE VOLTAGE TAKEN FROM ACROSS FIRST AND SECOND WIRES OF SAID LINE; A NEGATIVE-PHASE-SEQUENCE VOLTAGE FILTER ADAPTED TO BE CONNECTED TO SAID LINE FOR DERIVING THEREFROM A RESULTANT VOLTAGE DEPENDENT UPON THE NEGATIVE-PHASE-SEQUENCE COMPONENTS OF THE LINE VOLTAGES; AND NORMALLY INACTIVE CIRCUIT CONTROLLING MEANS CONNECTED TO SAID FILTER FOR ACTIVATION BY SAID RESULTANT VOLTAGE IN RESPONSE TO A REVERSAL OF THE NORMAL PHASE ROTATION OF THE LINE VOLTAGES AND ALSO IN RESPONSE TO DEENERGIZATION OF THE THIRD WIRE OF SAID LINE, SAID CIRCUIT CONTROLLING MEANS BEING CONNECTED IN SAID CIRCUIT MEANS AND BEING ARRANGED WHEN ACTIVATED TO CAUSE DEENERGIZATION OF THE UNDERVOLTAGE DEVICE.
Claim 2
Dependent Claim
171 words
A PROTECTIVE SYSTEM FOR ALTERNATING-CURRENT LOAD APPARATUS ENERGIZED BY POLYPHASE ELECTRIC POWER FROM A 3WIRE ELECTRIC POWER LINE, COMPRISING: AN ELECTRIC CIRCUIT INTERRUPTER ADAPTED TO BE CONNECTED BETWEEN THE LOAD APPARATUS AND SAID LINE, THE CIRCUIT INTERRUPTER BEING EQUIPPED WITH AN UNDERVOLTAGE DEVICE FOR EFFECTING, WHEN DEENERGIZED, AN INTERRUPTION IN THE SUPPLY OF ELECTRIC POWER TO SAID APPARATUS; CIRCUIT MEANS FOR CONNECTING THE UNDERVOLTAGE DEVICE FOR ENERGIZATION BY LINE VOLTAGE TAKEN FROM ACROSS FIRST AND SECOND WIRES OF SAID LINE; A NEGATIVE-PHASE-SEQUENCE VOLTAGE FILTER ADAPTED TO BE CONNECTED TO SAID LINE FOR DERIVING THEREFROM A RESULTANT VOLTAGE DEPENDENT UPON THE NEGATIVE-PHASE-SEQUENCE COMPONENTS OF THE LINE VOLTAGES; AND NORMALLY INACTIVE CIRCUIT CONTROLLING MEANS CONNECTED TO SAID FILTER FOR ACTIVATION BY SAID RESULTANT VOLTAGE IN RESPONSE TO A REVERSAL OF THE NORMAL PHASE ROTATION OF THE LINE VOLTAGES AND ALSO IN RESPONSE TO DEENERGIZATION OF THE THIRD WIRE OF SAID LINE, SAID CIRCUIT CONTROLLING MEANS BEING CONNECTED IN SAID CIRCUIT MEANS AND BEING ARRANGED WHEN ACTIVATED TO CAUSE DEENERGIZATION OF THE UNDERVOLTAGE DEVICE.
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) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |