US3368129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control circuit employing brake means for protection against unbalance of source current
Assignee: General Electric Co
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Filing: 1965-12-15
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Granted: 1968-02-06
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Expires: 1985-12-15
Abstract
No abstract record available.
Inventors
- 👤 Burnette P Chausse
- 👤 Charles E Konrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; B66C13/22; B66C13/23; B66C13/26; B66C15/00; B66C2700/00; B66C2700/08; B66C2700/081; B66C2700/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A CRANE CONTROL COMPRISING A THREE PHASE MOTOR, A THREE PHASE POWER SUPPLY, MEANS CONNECTING EACH PHASE OF SAID THREE PHASE MOTOR TO SAID THREE PHASE POWER SUPPLY, THREE SILICON CONTROLLED RECTIFIERS, THREE RECTIFIER DIODES, MEANS CONNECTING A SILICON CONTROLLED RECTIFIER AND A DIODE IN PARALLEL IN EACH PHASE BETWEEN SAID MOTOR AND SAID POWER SUPPLY, A SPEED REGULATOR CONNECTED TO THE GATE ELECTRODE OF EACH OF SAID SILICON CONROLLED RECTIFIER TO CONTROL THE TRIGGERING OF SAID SILICON CONTROLLED RECTIFIER, MEANS FOR SENSING THE CURRENT IN EACH PHASE BETWEEN SAID MOTOR AND SAID POWER SUPPLY, A BRAKE FOR STOPPING SAID MOTOR, AND MEANS RESPONSIVE TO AN UNBALANCE BETWEEN THE CURRENT IN THE THREE PHASES TO APPLY SAID BRAKE TO SAID CRANE MOTOR TO STOP SAID CRANE MOTOR.
Claim 2
Dependent Claim
127 words
A CRANE CONTROL COMPRISING A THREE PHASE MOTOR, A THREE PHASE POWER SUPPLY, MEANS CONNECTING EACH PHASE OF SAID THREE PHASE MOTOR TO SAID THREE PHASE POWER SUPPLY, THREE SILICON CONTROLLED RECTIFIERS, THREE RECTIFIER DIODES, MEANS CONNECTING A SILICON CONTROLLED RECTIFIER AND A DIODE IN PARALLEL IN EACH PHASE BETWEEN SAID MOTOR AND SAID POWER SUPPLY, A SPEED REGULATOR CONNECTED TO THE GATE ELECTRODE OF EACH OF SAID SILICON CONROLLED RECTIFIER TO CONTROL THE TRIGGERING OF SAID SILICON CONTROLLED RECTIFIER, MEANS FOR SENSING THE CURRENT IN EACH PHASE BETWEEN SAID MOTOR AND SAID POWER SUPPLY, A BRAKE FOR STOPPING SAID MOTOR, AND MEANS RESPONSIVE TO AN UNBALANCE BETWEEN THE CURRENT IN THE THREE PHASES TO APPLY SAID BRAKE TO SAID CRANE MOTOR TO STOP SAID CRANE MOTOR.
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) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |