US3585577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transceiver
Assignee: Southwest Research Institute
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Filing: 1969-06-12
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Granted: 1971-06-15
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Expires: 1989-06-12
Abstract
Abstract Simplified ultrasonic transceiving apparatus preferably incorporating transducer means coupling ultrasonic vibrations into a medium, said means being bidirectional in operation to also convert vibrations from the medium into electrical signals; an oscillatory signal applied to said transducer means for propagation into the medium, and means forming an output signal combining the oscillatory signal and vibrations received from within the medium into an electrical signal.
Inventors
- 👤 William L Rollwitz
- 👤 Harvey S Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/52003; G01S7/534; Y; Y10; Y10S; Y10S367/00; Y10S367/903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
An ultrasonic transceiver comprising: a. a transistor having base, collector, and emitter terminals; b. a tank circuit connected to at least two of tHe terminals of said transistor for forming an oscillator circuit capable of sustaining oscillations; c. transducer means connected in said tank circuit, said transducer having an impedance which at least partially comprises a portion of said tank circuit, and being further communicated with an ultrasonic medium for transmitting and receiving ultrasonic vibrations; d. said transducer means being connected to apply the signal thereacross at least directly to said transistor for amplification; and, e. an output circuit connected to at least one terminal of said transistor and provided with the amplified transducer means signal for forming an output of doppler frequency shifts representative of relative movement in the medium.
Claim 2
Dependent Claim
131 words
An ultrasonic transceiver comprising: a. a transistor having base, collector, and emitter terminals; b. a tank circuit connected to at least two of tHe terminals of said transistor for forming an oscillator circuit capable of sustaining oscillations; c. transducer means connected in said tank circuit, said transducer having an impedance which at least partially comprises a portion of said tank circuit, and being further communicated with an ultrasonic medium for transmitting and receiving ultrasonic vibrations; d. said transducer means being connected to apply the signal thereacross at least directly to said transistor for amplification; and, e. an output circuit connected to at least one terminal of said transistor and provided with the amplified transducer means signal for forming an output of doppler frequency shifts representative of relative movement in the medium.
Claim 3
Dependent Claim
38 words
The invention of claim 1 wherein said transistor is connected at its collector to a load resistor across which the amplified signal is developed, and wherein said output circuit includes a coupling capacitor connected to said load resistor.
Claim 4
Dependent Claim
64 words
The invention of claim 1 wherein a coupling capacitor is connected to said transistor for deriving the the amplified signal therefrom, said output circuit including: a. a second transistor having base, collector and emitter terminals; b. said coupling capacitor connected to one of the terminals of said second transistor; and, c. additional circuit elements connected to said second transistor for forming an amplified signal.
Claim 5
Dependent Claim
20 words
The invention of claim 3 wherein said additional circuit elements include an output coupling capacitor connected to said second transistor.
Claim 6
Dependent Claim
30 words
The invention of claim 1 wherein said transducer means includes a capacitive impedance and said tank circuit includes an inductive reactance which forms a resonant circuit with said transducer means.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |