Double diaphragm electrostatic transducer each diaphragm comprising two plastic sheets having different charge carrying characteristics
US4160882A · kind A · utility
41Cited by
6References
11Claims
0Family size
Inventor
Key dates
| Filing date | Mar 13, 1978 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Mar 13, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrostatic transducer, such as a loudspeaker, employs parallel plastic diaphragms, each carrying an electrically conductive metallic layer; frames separately mounting the diaphragms, the frames assembled to a central, perforate electrically conductive sheet sandwiched between the diaphragms, and to foraminous sheets of dielectric material sandwiched between the central sheet and the diaphragms and frames, thereby to realize a compact, easily assembled unit characterized by very high performance qualities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.