Method of fabricating the diaphragm unit of a condenser microphone by electron beam welding
US5038459A · kind A · utility
9Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49863
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A one-piece diaphragm unit for a condenser microphone fabricated by gripping a diaphragm with predetermined tension, between metallic first and second rings, and electron beam welding the two rings and diaphragm together. Preferably, one of the first and second rings is provided with an edge flange which is raised about its inner periphery and extends inwardly of the other ring, biasing thereinto the diaphragm. When the diaphragm unit is built in the condenser microphone, a support plate of an insulating material is disposed in engagement with the first ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.