US3171074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed-regulating control systems for series commutator motors
Assignee: Singer Co
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Filing: 1961-03-06
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Granted: 1965-02-23
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Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 James W Momberg
- 👤 Edward W Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 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
110 words
A SPEED-REGULATING CONTROL SYSTEM FOR AN ELECTRIC MOTOR HAVING SERIES-CONNECTED FIELD AND ARMATURE WINDINGS FED FROM AN A.C. SUPPLY VOLTAGE COMPRISING A SOLIDSTATE CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE FOR CONTROLLING THE CURRENT TO SAID WINDINGS MEANS FOR DERIVING A REFERENCE VOLTAGE FOR THE GATE INCLUDING A FIXED IMPEDANCE CONNECTED ACROSS THE SUPPLY VOLTAGE, A DOUBLE-ANODE ZENER DIODE SHUNTING A PORTION OF SAID IMPEDANCE TO STABILIZE THE VOLTAGE ACROSS SAID PORTION, AND A VARIABLE INDUCTING IMPEDANCE SHUNTING A PART OF THE PORTION SHUNTED BY THE ZENER DIODE, SAID VARIABLE IMPEDANCE BEING CONNECTED IN SERIES WITH THE ARMATURE WINDING BETWEEN THE GATE AND CATHODE OF SAID RECTIFIER.
Claim 2
Dependent Claim
110 words
A SPEED-REGULATING CONTROL SYSTEM FOR AN ELECTRIC MOTOR HAVING SERIES-CONNECTED FIELD AND ARMATURE WINDINGS FED FROM AN A.C. SUPPLY VOLTAGE COMPRISING A SOLIDSTATE CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE FOR CONTROLLING THE CURRENT TO SAID WINDINGS MEANS FOR DERIVING A REFERENCE VOLTAGE FOR THE GATE INCLUDING A FIXED IMPEDANCE CONNECTED ACROSS THE SUPPLY VOLTAGE, A DOUBLE-ANODE ZENER DIODE SHUNTING A PORTION OF SAID IMPEDANCE TO STABILIZE THE VOLTAGE ACROSS SAID PORTION, AND A VARIABLE INDUCTING IMPEDANCE SHUNTING A PART OF THE PORTION SHUNTED BY THE ZENER DIODE, SAID VARIABLE IMPEDANCE BEING CONNECTED IN SERIES WITH THE ARMATURE WINDING BETWEEN THE GATE AND CATHODE OF SAID 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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |