Patent US3211988A successfully refreshed from Google Patents.
US3211988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator with accelerated switching means
Assignee: Fairbanks Morse Inc
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Filing: 1961-07-13
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Granted: 1965-10-12
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Expires: 1981-07-13
Abstract
No abstract record available.
Inventors
- 👤 Robert M Henderson
- 👤 Zechlin Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/26; H02P9/30; H02P9/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
A VOLTAGE REGULATOR FOR USE WITH ALTERNATING VOLTAGE EQUIPMENT HAVING AN OUTPUT CIRCUIT AND A FIELD WINDING SAID VOLTAGE REGULATOR BEING CONNECTED BETWEEN SAID OUTPUT CIRCUIT AND SAID FIELD WINDING AND COMPRISING A SENSING CIRCUIT INCLUDING THRESHOLD SWITCHING MEANS CONNECTED TO SAID OUTPUT CIRCUIT, CONTROL CIRCUIT MEANS CONNECTED TO SAID SENSING CIRCUIT, SAID SENSING CIRCUIT OPERATING TO ACTUATE SAID CONTROL CIRCUIT MEANS TO A FIRST CONDUCTION CONDITION WHENEVER THE OUTPUT VOLTAGE ACROSS SAID OUTPUT CIRCUIT FALLS BELOW A GIVEN THRESHOLD VALUE AND TO ACTUATE SAID CONTROL CIRCUIT MEANS TO A SECOND CONDUCTION CONDITION WHENEVER THE OUTPUT VOLTAGE ACROSS SAID OUTPUT CIRCUIT EXCEEDS SAID THRESHOLD VALUE, CURRENT CONTROL MEANS CONNECTED TO REGULATE THE FLOW OF CURRENT TO SAID FIELD WINDING, SAID CURRENT CONTROL MEANS BEING CONNECTED TO SAID CONTROL CIRCUIT MEANS, WHEREBY SAID CURRENT CONTROL MEANS IS RENDERED CONDUCTIVE WHENEVER SAID CONTROL CIRCUIT MEANS IS IN SAID FIRST CONDUCTIVE CONDITION AND NONCONDUCTIVE WHENEVER SAID COTROL CIRCUIT MEANS IS IN SAID SECOND CONDUCTIVE CONDITION, AND INDUCTIVE MEANS ELECTRICALLY CONNECTED BETWEEN SAID CURRENT CONTROL MEANS AND SAID FIELD WINDING AND TO SAID SENSING CIRCUIT, SAID MEANS OPERATING UPON THE CONDUCTION OF SAID CURRENT CONTROL MEANS TO PROVIDE A VOLTAGE TO SAID THRESHOLD SWITCHING MEANS TO ACCELERATE THE SWITCHING OF SAID SENSING CIRCUIT TO THE FIRST CONDUCTION CONDITION.
Claim 2
Dependent Claim
214 words
A VOLTAGE REGULATOR FOR USE WITH ALTERNATING VOLTAGE EQUIPMENT HAVING AN OUTPUT CIRCUIT AND A FIELD WINDING SAID VOLTAGE REGULATOR BEING CONNECTED BETWEEN SAID OUTPUT CIRCUIT AND SAID FIELD WINDING AND COMPRISING A SENSING CIRCUIT INCLUDING THRESHOLD SWITCHING MEANS CONNECTED TO SAID OUTPUT CIRCUIT, CONTROL CIRCUIT MEANS CONNECTED TO SAID SENSING CIRCUIT, SAID SENSING CIRCUIT OPERATING TO ACTUATE SAID CONTROL CIRCUIT MEANS TO A FIRST CONDUCTION CONDITION WHENEVER THE OUTPUT VOLTAGE ACROSS SAID OUTPUT CIRCUIT FALLS BELOW A GIVEN THRESHOLD VALUE AND TO ACTUATE SAID CONTROL CIRCUIT MEANS TO A SECOND CONDUCTION CONDITION WHENEVER THE OUTPUT VOLTAGE ACROSS SAID OUTPUT CIRCUIT EXCEEDS SAID THRESHOLD VALUE, CURRENT CONTROL MEANS CONNECTED TO REGULATE THE FLOW OF CURRENT TO SAID FIELD WINDING, SAID CURRENT CONTROL MEANS BEING CONNECTED TO SAID CONTROL CIRCUIT MEANS, WHEREBY SAID CURRENT CONTROL MEANS IS RENDERED CONDUCTIVE WHENEVER SAID CONTROL CIRCUIT MEANS IS IN SAID FIRST CONDUCTIVE CONDITION AND NONCONDUCTIVE WHENEVER SAID COTROL CIRCUIT MEANS IS IN SAID SECOND CONDUCTIVE CONDITION, AND INDUCTIVE MEANS ELECTRICALLY CONNECTED BETWEEN SAID CURRENT CONTROL MEANS AND SAID FIELD WINDING AND TO SAID SENSING CIRCUIT, SAID MEANS OPERATING UPON THE CONDUCTION OF SAID CURRENT CONTROL MEANS TO PROVIDE A VOLTAGE TO SAID THRESHOLD SWITCHING MEANS TO ACCELERATE THE SWITCHING OF SAID SENSING CIRCUIT TO THE FIRST CONDUCTION CONDITION.
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |