US3165688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cemf responsive motor speed control circuit
Assignee: General Electric Co
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Filing: 1962-03-15
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Granted: 1965-01-12
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Expires: 1982-03-15
Abstract
No abstract record available.
Inventors
- 👤 Frank W Gutzwiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:26
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A SPEED CONTROL CIRCUIT FOR A DIRECT CURRENT MOTOR HAVING AN ARMATURE AND A FIELD, COMPRISING A CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE, AND A CONTROL ELECTRODE, MEANS COUPLING SAID ARMATURE, SAID FIELD, AND THE ANODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER IN A SERIES CIRCUIT, A SECOND RECTIFIER HAVING AN ANODE AND A CATHODE, MEANS COUPLING SAID SECOND RECTIFIER IN PARALLEL WITH SAID ANODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER SO THAT THE ANODE-CATHODE PATH OF SAID SECOND RECTIFIER IS IN THE OPPOSITE DIRECTION RELATIVE TO SAID ANODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER, A CAPACITOR COUPLED IN A CIRCUIT INCLUDING THE CONTROL ELECTRODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER AND FURTHER INCLUDING SAID ARMATURE, AND AN IMPEDANCE ELEMENT COUPLED IN A CIRCUIT INCLUDING THE CONTROL ELECTRODE-ANODE PATH OF SAID CONTROLLED RECTIFIER.
Claim 2
Dependent Claim
130 words
A SPEED CONTROL CIRCUIT FOR A DIRECT CURRENT MOTOR HAVING AN ARMATURE AND A FIELD, COMPRISING A CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE, AND A CONTROL ELECTRODE, MEANS COUPLING SAID ARMATURE, SAID FIELD, AND THE ANODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER IN A SERIES CIRCUIT, A SECOND RECTIFIER HAVING AN ANODE AND A CATHODE, MEANS COUPLING SAID SECOND RECTIFIER IN PARALLEL WITH SAID ANODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER SO THAT THE ANODE-CATHODE PATH OF SAID SECOND RECTIFIER IS IN THE OPPOSITE DIRECTION RELATIVE TO SAID ANODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER, A CAPACITOR COUPLED IN A CIRCUIT INCLUDING THE CONTROL ELECTRODE-CATHODE PATH OF SAID CONTROLLED RECTIFIER AND FURTHER INCLUDING SAID ARMATURE, AND AN IMPEDANCE ELEMENT COUPLED IN A CIRCUIT INCLUDING THE CONTROL ELECTRODE-ANODE PATH OF SAID CONTROLLED RECTIFIER.
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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |