High fidelity underwater misic projector
Abstract
Abstract A FERROELECTRIC STACK, POLARIZED FOR AXIAL EXCURSIONS TO TRANSFER SIGNALS REPRESENTATIVE OF ACOUSTIC ENERGY, IS HELD IN COMPRESSION BY CAP MEMBERS MOUNTED ON ITS OPPOSITE ENDS TO TRANSFER RECEIVED OR PROJECTED ACOUSTIC ENERGY THROUGH CIRCUMFERENTIALLY ENCLOSING LONGITUDINALLY RUNNING RIBS. BECAUSE OF THEIR CROSS-SECTIONAL CONFIGURATION AND BECAUSE THEY ARE COUPLED IN A PARTICULAR ANGLE WITH RESPECT TO THE CAP MEMBERS, THE STACK''S AXIAL EXCURSIONS ARE CONVERTED TO MAGNIFIED RADIAL DISPLACEMENTS WHEN THE TRANSDUCER IS USED IN THE TRANSMIT MODE. IN ADDITION, GREATER SENSITIVITY TO IMPINGING ACOUSTICAL ENERGY IS PROVIDED BY THE LARGE RECEIVING SURFACES PRESENTED BY THE OTHER SURFACES OF THE RIBS WHEN THE TRANSDUCER FUNCTIONS IN THE RECEIVE MODE.
Inventors
- 👤 F Abbott
Bibliographic Details
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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 |