H - Electricity – 04 – R
Patent
H - Electricity
04
R
349/67
H04R 17/00 (2006.01) B06B 1/06 (2006.01) H01L 41/08 (2006.01) H01L 41/09 (2006.01)
Patent
CA 1071750
ABSTRACT OF THE DISCLOSURE A transducer of the type converting between electrical and mechanical energy by means of the piezo- electric effect in a supported sheet of uniaxially oriented, electrically polarized thin high polymer film such as poly- vinylidene flouride, having surface electrodes thereon for connection to an electrical circuit. The transducer is characterized by an arrangement of the piezoelectric film into a series of elongate curved cylindrical segments of alternating sign of curvature, with the surface electrodes on the film being divided in selected locations between adjacent segments. A useful level of elastic stability is achieved without using a static pressure difference on the film, good electromechanical coupling is attained, and the individual transducer elements formed by the divided surface electrodes may be usefully interrelated electrically to substantially cancel even order harmonic distortion and enhance linearity of operation.
276015
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