Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1986-11-24
1988-11-01
Kyle, Deborah L.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367159, 310337, 29 2535, 29594, 26427216, H04R 1700
Patent
active
047824700
ABSTRACT:
Permeation of sea water through the protective rubber housing to the conductive portions of the exterior surface of the ceramic or other pressure-sensitive element results in the development of a low insulation resistance which leads to failure of the unit. The operational life of the unit is extended through the application of an acoustically transparent water impervious layer, interposed and bonded between the exterior surface of the ceramic or other pressure-sensitive element and the interior surface of the rubber housing.
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"The Condensed Chemical Dictionary 8th Edition", Van Nostrand Reinhold Co., N.Y., N.Y., 1971, p. 350.
Poturnicki, Jr. Alfred S.
Traft James E.
General Instrument Corp.
Kyle Deborah L.
Steinberger Brian S.
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