Importance

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Abstract

Apparatus to prevent the deposition of dirt and fine air bubbles on the flat end of a piezo-electrical crystal transducer that emits and receives ultrasonic waves consists of a body having an internal passage that angularly directs water in sweeping relation to the flat end of the crystal to keep it cleansed of air bubbles, dirt or scum. A portion of the so-directed water is diverted angularly to and away from the crystal end to thereby produce a pressure at the transducer end of sufficient magnitude to suppress the generation of air bubbles. Part of the entering water enters a vertical water column that couples the transducer to the object being measured while the cleansing portion of the stream is re-directed back into the apparatus to join that in the vertical column to create a water jet of essentially uniform velocity distribution.

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First Claim