Importance

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Abstract

An improved dampened ultrasonic transducer for imparting sonic energy to or receiving sonic energy from fluid, having a housing with a cylindrical cavity therein providing a closed end wall at one end and an opening in the opposite end, the housing having internal threads adjacent the opening. A piezoelectric crystal is positioned within the housing, the front face being contiguous to the cavity closed end wall, a cylindrical dampening member positioned within the cavity with the front face contiguous to the crystal rear face, a plurality of spring washers, the forwardmost washer engaging the rearward face of the dampener member, and an externally threaded plug member positioned in the rearward end of the housing and threadably advanced to apply compressive resilient force against the dampening member to maintain firm contact of the dampening member with the crystal and the crystal with the housing closed end wall.

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First Claim