Water resistant audible signal

Communications: electrical – Audible indication – Weatherproofing

Reexamination Certificate

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Details

C340S384100, C340S384600, C340S693500, C340S692000, C381S189000, C381S190000, C381S345000, C381S386000, C381S391000, C381S395000, C367S162000, C367S163000

Reexamination Certificate

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06987445

ABSTRACT:
The invention is an modified audible signal, such as a piezoelectric noise-making and audible signaling device, which further includes a hydrophobic covering material, such as polytetrafluoroethylene (PTFE). The hydrophobic covering material is known to be water resistant, but does not effect the sound of the audible signaling device, thereby delaying or preventing the failure of the audible signaling device from water corrosion.

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