Microphone

Details Microphone Microphone

2006-12-26

2006-12-26

Tran, Sinh (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Housed microphone

C381S355000

Reexamination Certificate

active

07155024

ABSTRACT:
A microphone includes a tubular housing extending along a longitudinal axis, a perforated cover mounted on a front open end of the housing and having a circular cross section along a plane transverse to the longitudinal axis, and a positioning ring sleeved on the perforated cover and having an outer peripheral surface that is formed alternately with a plurality of rolling sections and positioning sections. Each of the positioning sections has two opposite ends connected respectively to two adjacent ones of the rolling sections, and an intermediate part disposed between and indented relative to the opposite ends.

REFERENCES:
patent: 3642558 (1972-02-01), Gorike
patent: 4065648 (1977-12-01), Cvetko et al.
patent: 5144677 (1992-09-01), Asakura et al.
patent: 5742697 (1998-04-01), Ching-Chung
patent: 6463159 (2002-10-01), Ming-Cheng
patent: 6968070 (2005-11-01), Chiang

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