US3076870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound transducer system
Assignee: Navigation Computer Corp
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Filing: 1961-09-05
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Granted: 1963-02-05
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Expires: 1981-09-05
Abstract
No abstract record available.
Inventors
- 👤 Jr John Paul Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:07
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
A SOUND TRANSDUCER COMPRISING, IN COMBINATION, A TRANSISTOR OSCILLATOR CIRCUIT INCLUDING A TANK CIRCUIT MOUNTED ON A PRINTED CIRCUIT BOARD, TUNING MEANS FOR SAID OSCILLATOR TANK CIRCUIT INCLUDING A PRESSURE SENSITIVE CAPACITOR, SAID CAPACITOR INCLUDING A FIRST RIGID CONDUCTIVE PLATE MOUNTED ON SAID PRINTED CIRCUIT BOARD AND A SECOND FLEXIBLE METAL COATED MEMBRANE PLATE MOUNTED IN CLOSE SPACED RELATIONSHIP TO SAID FIRST PLATE, MEANS FOR ENGAGING SAID TRANSDUCER IN SOUND TRANSMISSION CONTACT WITH A SOUND SOURCE INCLUDING A THIN FLEXIBLE DIAPHRAGM, MEANS PROVIDING A FLUID SOUND TRANSMITTING MEDIUM BETWEEN SAID DIAPHRAGM AND SAID CAPACITOR TO VARY THE PRESSURE ON SAID SECOND PLATE, THE CAPACITANCE OF SAID CAPACITOR, AND THE FREQUENCY OF SAID OSCILLATOR CIRCUIT IN RESPONSE TO SOUND WAVES, AND A FREQUENCY DISCRIMINATOR CIRCUIT CONNECTED WITH SAID OSCILLATOR CIRCUIT TO PROVIDE A VOLTAGE OUTPUT IN RESPONSE TO SAID VARIATIONS IN THE FREQUENCY OF SAID OSCILLATOR CIRCUIT.
References Cited (Backward Citations)
US2564562A
Cited
US2725548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |