Patent US3283235A successfully refreshed from Google Patents.
US3283235A
Expired / Lapsed
US
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Cemf responsive series motor control circuit
Assignee: Gates LearJet Corp
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Filing: 1964-02-04
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Granted: 1966-11-01
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Expires: 1984-02-04
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Auld
- 👤 Gary R Shier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:46
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
183 words
A SERIES MOTOR SPEED CONTROL CIRCUIT COMPRISING, IN COMBINATION, A MOTOR FIELD WINDING AND A MOTOR ARMATURE WINDING CONNECTIBLE TO A SOURCE OF A.C. VOLTAGE, A SILICON CONTROLLED RECTIFIER CONNECTED BETWEEN SAID FIELD WINDING AND SAID ARMATURE WINDING WITH SAID SILICON CONTROLLED RECTIFIER HAVING THE ANODE THEREOF CONNECTED TO ONE END OF SAID FIELD WINDING AND HAVING THE CATHODE THEREOF CONNECTED TO ONE END OF SAID ARMATURE WINDING, A FIRST FIXED RESISTANCE AND A FIRST DIODE CONNECTED IN SERIES WITH EACH OTHER AND CONNECTED IN PARALLEL TO SAID SILICON CONTROLLED RECTIFIER AND TO SAID ARMATURE WINDING, A SECOND DIODE CONNECTED IN PARALLEL TO SAID ARMATURE WINDING AND HAVING THE POLARITY THEREOF OPPOSITE TO THE POLARITY OF SAID FIRST DIODE, A GATING CIRCUIT FOR SAID SILICON CONTROLLED RECTIFIER INCLUDING A SECOND FIXED RESISTANCE CONNECTIBLE TO A SOURCE OF A.C. VOLTAGE AND TO A THIRD DIODE, SAID GATING CIRCUIT FURTHER INCLUDING A VARIABLE RESISTANCE CONNECTED IN SERIES WITH SAID THIRD DIODE AND WITH A THIRD FIXED RESISTANCE AND A FOURTH DIODE WITH SAID FOURTH DIODE BEING CONNECTED TO THE GATE ELECTRODE OF SAID SILICON CON-
Claim 2
Dependent Claim
183 words
A SERIES MOTOR SPEED CONTROL CIRCUIT COMPRISING, IN COMBINATION, A MOTOR FIELD WINDING AND A MOTOR ARMATURE WINDING CONNECTIBLE TO A SOURCE OF A.C. VOLTAGE, A SILICON CONTROLLED RECTIFIER CONNECTED BETWEEN SAID FIELD WINDING AND SAID ARMATURE WINDING WITH SAID SILICON CONTROLLED RECTIFIER HAVING THE ANODE THEREOF CONNECTED TO ONE END OF SAID FIELD WINDING AND HAVING THE CATHODE THEREOF CONNECTED TO ONE END OF SAID ARMATURE WINDING, A FIRST FIXED RESISTANCE AND A FIRST DIODE CONNECTED IN SERIES WITH EACH OTHER AND CONNECTED IN PARALLEL TO SAID SILICON CONTROLLED RECTIFIER AND TO SAID ARMATURE WINDING, A SECOND DIODE CONNECTED IN PARALLEL TO SAID ARMATURE WINDING AND HAVING THE POLARITY THEREOF OPPOSITE TO THE POLARITY OF SAID FIRST DIODE, A GATING CIRCUIT FOR SAID SILICON CONTROLLED RECTIFIER INCLUDING A SECOND FIXED RESISTANCE CONNECTIBLE TO A SOURCE OF A.C. VOLTAGE AND TO A THIRD DIODE, SAID GATING CIRCUIT FURTHER INCLUDING A VARIABLE RESISTANCE CONNECTED IN SERIES WITH SAID THIRD DIODE AND WITH A THIRD FIXED RESISTANCE AND A FOURTH DIODE WITH SAID FOURTH DIODE BEING CONNECTED TO THE GATE ELECTRODE OF SAID SILICON CON-
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |