Abstract
Method and apparatus for making a sonic transducer in which a lead zirconate titanate crystal in the form of a shallow cylinder is prepared and inserted into a shallow plastic thin walled cup with one face of the crystal in intimate contact with, and cemented by means of epoxy plastic to, the inner surface of the base of the cup. The sides and back of the crystal are protected with a thin layer of cork and all other space within the cup is filled with plastic. The cup and crystal is then inserted, open end first, into a cylindrical depression in a crystal holder, or transducer, so that the outer surface of the base of the cup is flush with the face of the transducer. The cup and crystal are cemented into the transducer.
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