US3178628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control circuits
Assignee: General Electric Co
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Filing: 1962-04-12
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Granted: 1965-04-13
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Expires: 1982-04-12
Abstract
No abstract record available.
Inventors
- 👤 John R Van Patten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/26; H02P7/265; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A MOTOR CONTROL CIRCUIT COMPRISING, A SOURCE OF ALTERNATING CURRENT, A CONTROLLED RECTIFIER SERIALLY CONNECTED BETWEEN THE ARMATURE OF SAID MOTOR AND SAID SOURCE, MEANS CONNECTING A FIELD WINDING OF SAID MOTOR TO SAID SOURCE FOR CONTINUOUSLY ENERGIZING SAID FIELD WINDING, MEANS CONNECTED TO SAID SOURCE FOR GENERATING A CONTROL SIGNAL COMPRISING A DIRECT VOLTAGE AND AN ALTERNATING VOLTAGE COMPONENT, MEANS CONNECTING SAID CONTROL SIGNAL TO SAID CONTROLLED RECTIFIER TO ESTABLISH CONDUCTION THEREOF IN ACCORDANCE WITH THE RELATIONSHIP BETWEEN THE MAGNITUDE OF SAID CONTROL SIGNAL AND THE MAGNITUDE OF THE VOLTAGE ACROSS SAID ARMATURE, MEANS FOR SIMULTANEOUSLY INCREASING THE MAGNITUDE OF SAID ALTERNATING VOLTAGE COMPONENT AND DECREASING THE MAGNITUDE OF SAID DIRECT VOLTAGE COMPONENT TO PROVIDE A SUBSTANTIALLY CONSTANT PEAK AMPLITUDE FOR SAID CONTROL SIGNAL.
Claim 2
Dependent Claim
125 words
A MOTOR CONTROL CIRCUIT COMPRISING, A SOURCE OF ALTERNATING CURRENT, A CONTROLLED RECTIFIER SERIALLY CONNECTED BETWEEN THE ARMATURE OF SAID MOTOR AND SAID SOURCE, MEANS CONNECTING A FIELD WINDING OF SAID MOTOR TO SAID SOURCE FOR CONTINUOUSLY ENERGIZING SAID FIELD WINDING, MEANS CONNECTED TO SAID SOURCE FOR GENERATING A CONTROL SIGNAL COMPRISING A DIRECT VOLTAGE AND AN ALTERNATING VOLTAGE COMPONENT, MEANS CONNECTING SAID CONTROL SIGNAL TO SAID CONTROLLED RECTIFIER TO ESTABLISH CONDUCTION THEREOF IN ACCORDANCE WITH THE RELATIONSHIP BETWEEN THE MAGNITUDE OF SAID CONTROL SIGNAL AND THE MAGNITUDE OF THE VOLTAGE ACROSS SAID ARMATURE, MEANS FOR SIMULTANEOUSLY INCREASING THE MAGNITUDE OF SAID ALTERNATING VOLTAGE COMPONENT AND DECREASING THE MAGNITUDE OF SAID DIRECT VOLTAGE COMPONENT TO PROVIDE A SUBSTANTIALLY CONSTANT PEAK AMPLITUDE FOR SAID CONTROL SIGNAL.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |