US3191112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control system utilizing semiconductor controlled rectifiers
Assignee: Texas Instruments Inc
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Filing: 1961-12-26
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Granted: 1965-06-22
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Ernest O Cain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:33
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A CONTROL CIRCUIT COMPRISING: (A) A SOURCE OF UNIDIRECTIONAL PULSATING VOLTAGE HAVING POSITIVE AND NEGATIVE OUTPUT TERMINALS, (B) A LOAD HAVING FIRST AND SECOND TERMINALS AND EXHIBITING VARYING VOLTAGE DROP THEREACROSS, SAID SECOND TERMINAL BEING CONNECTED TO SAID NEGATIVE OUTPUT TERMINAL, (C) A SEMICONDUCTOR CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE, SAID ANODE BEING CONNECTED TO SAID POSITIVE OUTPUT TERMINAL, SAID CATHODE BEING CONNECTED TO THE FIRST TERMINAL OF SAID LOAD, (D) A FIRST CAPACITOR AND A FIRST RESISTOR CONNECTED IN SERIES ACROSS THE FIRST AND SECOND TERMINALS OF SAID LOAD, (E) A VARIABLE RESISTOR AND A SECOND CAPACITOR CONNECTED IN SERIES BETWEEN SAID ANODE AND SAID CATHODE, (F) AND A UNIDIRECTIONAL CONDUCTIVE THRESHOLD TRIGGER DEVICE CONNECTED BETWEEN SAID GATE AND THE JUNCTURE OF SAID VARIABLE RESISTOR AND SAID SECOND CAPACITOR.
Claim 2
Dependent Claim
134 words
A CONTROL CIRCUIT COMPRISING: (A) A SOURCE OF UNIDIRECTIONAL PULSATING VOLTAGE HAVING POSITIVE AND NEGATIVE OUTPUT TERMINALS, (B) A LOAD HAVING FIRST AND SECOND TERMINALS AND EXHIBITING VARYING VOLTAGE DROP THEREACROSS, SAID SECOND TERMINAL BEING CONNECTED TO SAID NEGATIVE OUTPUT TERMINAL, (C) A SEMICONDUCTOR CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE, SAID ANODE BEING CONNECTED TO SAID POSITIVE OUTPUT TERMINAL, SAID CATHODE BEING CONNECTED TO THE FIRST TERMINAL OF SAID LOAD, (D) A FIRST CAPACITOR AND A FIRST RESISTOR CONNECTED IN SERIES ACROSS THE FIRST AND SECOND TERMINALS OF SAID LOAD, (E) A VARIABLE RESISTOR AND A SECOND CAPACITOR CONNECTED IN SERIES BETWEEN SAID ANODE AND SAID CATHODE, (F) AND A UNIDIRECTIONAL CONDUCTIVE THRESHOLD TRIGGER DEVICE CONNECTED BETWEEN SAID GATE AND THE JUNCTURE OF SAID VARIABLE RESISTOR AND SAID SECOND CAPACITOR.
References Cited (Backward Citations)
US2552206A
Cited
US2981880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |