Moisture barrier assembly

Details Moisture barrier assembly Moisture barrier assembly

1988-11-16

1990-04-24

Ng, Jin F.

Telephonic communications

Terminal

Housing or housing component

379440, 381157, 381189, 181242, H04M 103, H04R 128

Patent

active

049205641

ABSTRACT:
A microphone unit for a telephone handset comprises a microphone mount, a microphone mounted in the microphone mount, a mouthpiece detachably fixed to the handset, and a moisture barrier assembly for preventing ingress of moisture into the microphone. The moisture barrier assembly is constituted by a moisture barrier, an annular seal and a support plate. The support plate has a perforated portion covered by, but spaced from, the moisture barrier. The moisture barrier assembly is positioned between the mouthpiece and the microphone mount. Venting means vents a space between the moisture barrier and the microphone. The moisture barrier is constituted by a moisture impermeable film whose peripheral edge portion is fixed to the annular seal. The seal is fixed to the support plate and seals against the front face of the microphone.

REFERENCES:
patent: 4424419 (1984-01-01), Chaput et al.

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