Piezoelectric apparatus for activating square plate resonator
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United States of America Patent
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-
Oct 28, 1986
Grant Date -
N/A
app pub date -
Dec 3, 1985
filing date -
May 30, 1984
priority date (Note) -
Expired
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Abstract
An apparatus equipped with annular electrostriction elements each having four divided segmental electrodes with the respective polarities reversed alternately in the direction of thickness thereof. The annular electrostriction elements are so disposed that the center lines of division are positionally coincident with diagonal lines of a square plate resonator while passing through the surface center point thereof, whereby the corner portions of the resonator can be vibrated effectively at an ultrasonic frequency.
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