Electroacoustic transducer with a piezoelectric diaphragm
US4607145A · kind A · utility
29Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1984 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Mar 5, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A telephone transducer having a body and a spacer for securing a piezoelectric diaphragm and a printed circuit, wherein the body and the spacer are made with electrically conducting material to carry out the connections between the diaphragm and the printed circuit. The diaphragm can be made of polyvinylidene fluoride or polyvinylidene fluoride copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.