Electrostatic loudspeaker element
US3935397A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 1974 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Jan 28, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrostatic loudspeaker element including a diaphragm positioned between a pair of acoustically transparent wire grid electrode assemblies. In the preferred embodiment, each electrode assembly comprises a flat rectangular frame having a plurality of wire guiding slots on both sides. A wire whose diameter equals the depth of the slots is wound continuously around the frame in a helical pattern, and a dielectric spacer is adhesively attached to the frame across the slots to maintain the critical distance between the wire grid and the diaphragm. The frame is made of a material having a coefficient of thermal expansion equal to the wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.