Low frequency acoustical piezo-electric transducer
US4031418A · kind A · utility
10Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Sep 3, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A piezo-electric transducer for low frequency acoustical waves comprising a stack of piezo-electric elements and alternating electrodes disposed between a front receiver plate and a counter mass. The countermass comprises a rigid annular block surrounding the stack, a rear plate engaging the rear of the stack and an elastic connection between the block and the rear plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.