Electro-acoustic transducer with active dome
US4440983A · kind A · utility
36Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Jan 5, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electro-acoustic transducer using a self-supporting active radiating membrane made from a polymer material. The invention provides a transducer in which a resilient shape restoring member fixed to the case capped by the radiating membrane takes on the shape of the concave parts of the membrane, so as to oppose the definitive staving-in of the membrane by an accidental thrust force acting on the dome shaped protuberance on its outer face and restore the member to its initial shape when the force is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.