Piezoelectric transformer
Abstract
Abstract A BODY OF CERAMIC PIEZOELECTRIC MATERIAL OF THE LEAD TITANATE, LEAD ZIRCONATE TYPE WITH AN ADDITIVE OF THE IRON OXIDE TYPE IS PROVIDED HAVING REGIONS ELECTRODED AND POLARIZED SUCH THAT THE ELECTRICAL IMPEDANCES ARE MARKEDLY DIFFERENT. HIGH VOLTAGE TRANSFORMATIONS ARE OBTAINED IN THIS MANNER BETWEEN INPUT AND OUTPUT ELECTRODES. A THIRD SET OF ELECTRODES COUPLED TO ONE OF THE OTHER SETS OF ELECTRODES ENABLES THE TRANSFORMER TO ACCOMPLISH SELFOSCILLATION. IN ORDER TO ENABLE THE BODY TO BE SUPPORTED AT MORE THAN ONE VIBRATIONAL NODE, THE BODY IS CAUSED TO VIBRATE AT A HARMONIC OF ITS FUNDAMENTAL FREQUENCY OF VIBRATION OR MORE PRECISELY IN AMODE WITH ONE FULL ACOUSTIC WAVELENGTH ALONG THE CERAMIC BODY, OR TWO OR MORE HALF WAVELENGTHS.
Inventors
- 👤 Don A Berlincourt
- 👤 Lawrence S Sliker
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |