Patent US3242346A successfully refreshed from Google Patents.
US3242346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static speed control apparatus responsive to variations in frequency
Assignee: Garrett Corp
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Filing: 1961-08-31
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Granted: 1966-03-22
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Expires: 1981-08-31
Abstract
No abstract record available.
Inventors
- 👤 Leo A Skoubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
H; H02; H02P; H02P23/00; H02P23/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
AN ELECTRICAL SPEED CONTROL CIRCUIT INCLUDING SEMICONDUCTOR ELEMENTS COMPRISING: A PARALLEL RESONANT CIRCUIT HAVING A SPLIT-CAPACITOR AND A VARIABLE INDUCTOR; MEANS FOR GENERATING ALTERNATING ELECTRICAL ENERGY HAVING A FREQUENCY OF ALTERNATION RELATED TO THE SPEED TO BE CONTROLLED; A TEMPERATURE-SENSITIVE RESISTOR CONNECTED ACROSS SAID GENERATING MEANS, SAID TEMPERATURE-SENSITIVE RESISTOR ALSO CONNECTED ACROSS PART OF THE CAPACITOR COMPRISING SAID SPLIT-CAPACITOR TO INTRODUCE SAID ELECTRICAL ENERGY TO SAID RESONANT CIRCUIT; A PAIR OF SEMICONDUCTOR DIODES TO PASS THE POSITIVE POLARITY OF ALTERNATE HALF-WAVES OF SAID ALTERNATING ELECTRICAL ENERGY THE ANODE OF EACH OF SAID DIODES CONNECTED TO AN OPPOSITE END OF SAID INDUCTOR; A FILTER RESISTOR CONNECTED ACROSS ONE OF SAID DIODES; A FILTER CAPACITOR CONNECTED BETWEEN THE CATHODES OF EACH OF SAID DIODES; A SEMICONDUCTOR CONTROLLED RECTIFIER HAVING A CATHODE, AN ANODE AND A GATE ELECTRODE, THE CATHODE OF SAID CONTROLLED RECTIFIER CONNECTED TO THE CATHODE OF SAID SAID DIODES, THE GATE ELECTRODE OF SAID CONTROLLED RECTIFIER CONNECTED TO THE CATHODE OF THE OTHER SAID DIODE TO CAUSE SAID CONTROLLED RECTIFIER TO CONDUCT WHEN THE AMPLITUDE OF THE POSITIVE CHARGE UPON SAID FILTER REACHES A PREDETER-
Claim 2
Dependent Claim
185 words
AN ELECTRICAL SPEED CONTROL CIRCUIT INCLUDING SEMICONDUCTOR ELEMENTS COMPRISING: A PARALLEL RESONANT CIRCUIT HAVING A SPLIT-CAPACITOR AND A VARIABLE INDUCTOR; MEANS FOR GENERATING ALTERNATING ELECTRICAL ENERGY HAVING A FREQUENCY OF ALTERNATION RELATED TO THE SPEED TO BE CONTROLLED; A TEMPERATURE-SENSITIVE RESISTOR CONNECTED ACROSS SAID GENERATING MEANS, SAID TEMPERATURE-SENSITIVE RESISTOR ALSO CONNECTED ACROSS PART OF THE CAPACITOR COMPRISING SAID SPLIT-CAPACITOR TO INTRODUCE SAID ELECTRICAL ENERGY TO SAID RESONANT CIRCUIT; A PAIR OF SEMICONDUCTOR DIODES TO PASS THE POSITIVE POLARITY OF ALTERNATE HALF-WAVES OF SAID ALTERNATING ELECTRICAL ENERGY THE ANODE OF EACH OF SAID DIODES CONNECTED TO AN OPPOSITE END OF SAID INDUCTOR; A FILTER RESISTOR CONNECTED ACROSS ONE OF SAID DIODES; A FILTER CAPACITOR CONNECTED BETWEEN THE CATHODES OF EACH OF SAID DIODES; A SEMICONDUCTOR CONTROLLED RECTIFIER HAVING A CATHODE, AN ANODE AND A GATE ELECTRODE, THE CATHODE OF SAID CONTROLLED RECTIFIER CONNECTED TO THE CATHODE OF SAID SAID DIODES, THE GATE ELECTRODE OF SAID CONTROLLED RECTIFIER CONNECTED TO THE CATHODE OF THE OTHER SAID DIODE TO CAUSE SAID CONTROLLED RECTIFIER TO CONDUCT WHEN THE AMPLITUDE OF THE POSITIVE CHARGE UPON SAID FILTER REACHES A PREDETER-
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |