US3323052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive tachometer with single resistive element range and calibration device
Assignee: CARPENTER CORP
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Filing: 1964-09-30
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Granted: 1967-05-30
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Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 David G Passmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:56
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/4802; G01P3/4807
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
AN ELECTRICALLY OPERATED ENGINE TACHOMETER, COMPRISING: A SOURCE OF ELECTRICAL IMPULSES WHICH HAVE A KNOWN RELATIONSHIP TO THE SPEED OF AN ENGINE AND TO THE NUMBER OF ITS CYLINDERS; A FILTER NETWORK INCLUDING A SERIES-CONNECTED CHOKE FOR INITIALLY RECEIVING SAID IMPULSES AND FOR SMOOTHING AND SHAPING THE SAME; A SERIES CIRCUIT BRANCH HAVING ONE END COUPLED TO SAID FILTER NETWORK AND INCLUDING A RESISTOR, A CAPACITOR, AND A FIRST UNIDIRECTIONALLY CONDUCTIVE COMPONENT CONNECTED TO CONDUCT IMPULSES HAVING A FIRST POLARITY AND TO BLOCK IMPULSES HAVING AN OPPOSITE POLARITY; A SEOND UNIDIRECTIONALLY CONDUCTIVE COMPONENT CONNECTED FROM A POINT IN SAID SERIES CIRCUIT BRANCH TO GROUND POTENTIAL, TO CONDUCT IMPULSES THEREBETWEEN HAVING A POLARITY OPPOSITE SAID FIRST POLARITY; A METER CONNECTED FROM THE END OF SAID SERIES CIRCUIT BRANCH OPPOSITE SAID ONE END THEREOF TO GROUND POTENTIAL, FOR STEADILY INDICATING A VALUE PROPORTIONAL TO THE AVERAGE OF IMPULSES CONDUCTED TO SUCH METER; AND A COMPOSITE RESISTOR MEANS CONNECTED ACROSS SAID METER FOR CAUSING A GIVEN DEFLECTION OF THE LATTER AT A GIVEN ENGINE SPEED, SAID COMPOSITE RESISTOR COMPRISING A SINGLE RESISTOR BODY HAVING A PLURALITY OF SWEEP ARMS IN SPACED
Claim 2
Dependent Claim
188 words
AN ELECTRICALLY OPERATED ENGINE TACHOMETER, COMPRISING: A SOURCE OF ELECTRICAL IMPULSES WHICH HAVE A KNOWN RELATIONSHIP TO THE SPEED OF AN ENGINE AND TO THE NUMBER OF ITS CYLINDERS; A FILTER NETWORK INCLUDING A SERIES-CONNECTED CHOKE FOR INITIALLY RECEIVING SAID IMPULSES AND FOR SMOOTHING AND SHAPING THE SAME; A SERIES CIRCUIT BRANCH HAVING ONE END COUPLED TO SAID FILTER NETWORK AND INCLUDING A RESISTOR, A CAPACITOR, AND A FIRST UNIDIRECTIONALLY CONDUCTIVE COMPONENT CONNECTED TO CONDUCT IMPULSES HAVING A FIRST POLARITY AND TO BLOCK IMPULSES HAVING AN OPPOSITE POLARITY; A SEOND UNIDIRECTIONALLY CONDUCTIVE COMPONENT CONNECTED FROM A POINT IN SAID SERIES CIRCUIT BRANCH TO GROUND POTENTIAL, TO CONDUCT IMPULSES THEREBETWEEN HAVING A POLARITY OPPOSITE SAID FIRST POLARITY; A METER CONNECTED FROM THE END OF SAID SERIES CIRCUIT BRANCH OPPOSITE SAID ONE END THEREOF TO GROUND POTENTIAL, FOR STEADILY INDICATING A VALUE PROPORTIONAL TO THE AVERAGE OF IMPULSES CONDUCTED TO SUCH METER; AND A COMPOSITE RESISTOR MEANS CONNECTED ACROSS SAID METER FOR CAUSING A GIVEN DEFLECTION OF THE LATTER AT A GIVEN ENGINE SPEED, SAID COMPOSITE RESISTOR COMPRISING A SINGLE RESISTOR BODY HAVING A PLURALITY OF SWEEP ARMS IN SPACED
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |