Method of fabricating the diaphragm unit of a condenser micropho

Details Method of fabricating the diaphragm unit of a condenser micropho Method of fabricating the diaphragm unit of a condenser micropho

1990-01-16

1991-08-13

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29 2541, 29446, 228112, 381168, 381174, H01G 516

Patent

active

050384597

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.

REFERENCES:
patent: 2106813 (1938-02-01), Romanow
patent: 4648480 (1987-03-01), Watanabe et al.

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