Patent US3304534A successfully refreshed from Google Patents.
US3304534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipurpose piezoelectric transducer system
Assignee: Individual
•
Filing: 1965-08-16
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Granted: 1967-02-14
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Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Alan O Sykes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:44
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/0092; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; G01H; G01H11/00; G01H11/06; G01H11/08; G01L1/00; G01L1/16; G01L23/00; G01L23/08; G01L23/10; G01V; G01V1/00; G01V1/16; G01V1/162; G01V1/164; G01V1/18; G01V1/186; G01V1/187; H; H04; H04R; H04R17/00; H04R17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A TRANSDUCER SYSTEM FOR PROVIDING AN OUTPUT SIGNAL REPRESENTING ACCURATE MEASUREMENT OF INPUT SIGNAL PARAMETERS UNDER CONDITIONS WHICH WOULD NORMALLY LEAD TO INACCURACIES DUE TO PRESENCE OF SECOND AND THIRD ORDER ERROR TERMS IN THE TRANSDUCER OUTPUT SIGNALS, COMPRISING; TRANSDUCER MEANS HAVING FIRST AND SECOND PIEZOELECTRIC ELEMENTS MOUNTED FOR RESPONSE TO INPUT SIGNAL PARAMETERS AT LEAST ONE OF WHICH IS SOUND PRESSURE TO PRODUCE OUTPUTS REPRESENTED BY VOLTAGE PHASORS EP1 AND EP2 RESPECTIVELY; THE SIGNAL DIFFERENCE BETWEEN VOLTAGE PHASORS EP2 AND EP1 OF THE RESPECTIVE OUTPUT SIGNALS OF THE PIEZOELECTRIC ELEMENTS HAVING SECOND AND THIRD ORDER SIGNAL ERROR COMPONENTS HEREIN; MEANS FOR SUBSTRACTING ONE SAID VOLTAGE PHASOR FROM THE OTHER THEREBY PRODUCING SAID SIGNAL ERROR COMPONENTS IN THE SIGNAL EP2-EP1; SIGNAL PROCESSING MEANS FOR DERIVING FROM SAID ONE VOLTAGE PHASOR SAID SIGNAL ERROR COMPONENTS; AND MEANS FOR ALGEBRAICALLY COMBINING THE SUBTRACTED SIGNALS WITH ONE VOLTAGE PHASOR DERIVED SIGNAL CONTAINING SAID SIGNAL ERROR COMPONENTS TO THEREBY ELIMINATE SAID SIGNAL ERROR COMPONENTS FROM THE SUBTRACTED SIGNALS EP2-EP1.
Claim 2
Dependent Claim
165 words
A TRANSDUCER SYSTEM FOR PROVIDING AN OUTPUT SIGNAL REPRESENTING ACCURATE MEASUREMENT OF INPUT SIGNAL PARAMETERS UNDER CONDITIONS WHICH WOULD NORMALLY LEAD TO INACCURACIES DUE TO PRESENCE OF SECOND AND THIRD ORDER ERROR TERMS IN THE TRANSDUCER OUTPUT SIGNALS, COMPRISING; TRANSDUCER MEANS HAVING FIRST AND SECOND PIEZOELECTRIC ELEMENTS MOUNTED FOR RESPONSE TO INPUT SIGNAL PARAMETERS AT LEAST ONE OF WHICH IS SOUND PRESSURE TO PRODUCE OUTPUTS REPRESENTED BY VOLTAGE PHASORS EP1 AND EP2 RESPECTIVELY; THE SIGNAL DIFFERENCE BETWEEN VOLTAGE PHASORS EP2 AND EP1 OF THE RESPECTIVE OUTPUT SIGNALS OF THE PIEZOELECTRIC ELEMENTS HAVING SECOND AND THIRD ORDER SIGNAL ERROR COMPONENTS HEREIN; MEANS FOR SUBSTRACTING ONE SAID VOLTAGE PHASOR FROM THE OTHER THEREBY PRODUCING SAID SIGNAL ERROR COMPONENTS IN THE SIGNAL EP2-EP1; SIGNAL PROCESSING MEANS FOR DERIVING FROM SAID ONE VOLTAGE PHASOR SAID SIGNAL ERROR COMPONENTS; AND MEANS FOR ALGEBRAICALLY COMBINING THE SUBTRACTED SIGNALS WITH ONE VOLTAGE PHASOR DERIVED SIGNAL CONTAINING SAID SIGNAL ERROR COMPONENTS TO THEREBY ELIMINATE SAID SIGNAL ERROR COMPONENTS FROM THE SUBTRACTED SIGNALS EP2-EP1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |