The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 1991
Filed:
Jan. 16, 1990
Applicant:
Inventors:
Mamoru Yasuda, Kobe, JP;
Hitoshi Toda, Kobe, JP;
Assignee:
Hosiden Electronics Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01G / ;
U.S. Cl.
CPC ...
29594 ; 29 2541 ; 29446 ; 228112 ; 381168 ; 381174 ;
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.