Transducer
Abstract
Abstract AN ELECTROACOUSTICAL TRANSDUCER IS DISCLOSED WHICH INCORPORATES, A DICED PIEZOELECTRIC CRYSTAL BACKED BY A PHENOLIC DISC, A RESILIENT PRESSURE RELEASE BUTYL RUBBER CUP, AN ALUMINUM BLOCK, AND A METALLIC CUP THAT CONTAINS SAID CRYSTAL, DISC, RUBBER CUP, AND ALUMINUM BLOCK. ELECTRODES ARE CONNECTED TO ALL OF THE ACTIVE END FACES AND THE BASE OF SAID DICED PIEZOELECTRIC CRYSTAL, AND ELECTRICAL WIRE CONDUCTORS ARE CONNECTED TO EACH OF SAID FACE ELECTRODES AND SAID BASE ELECTRODE. A BUTYL RUBBER PIEZOELECTRIC CRYSTAL, AND A AND RADIALLY FROM SAID DICED PIEZOELECTRIC CRYSTAL, AND A LIQUID ACOUSTICAL LENS IS EFFECTIVELY ASSOCIATED THEREWITH. A MOUNTING PIPE AND FLANGE ARE EFFECTIVELY CONNECTED TO SAID LENS AND METALLIC CUP FOR THE MOUNTING THEREOF ON A UTILIZATION APPARATUS.
Inventors
- 👤 R Cook
- 👤 D Folds
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |