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Ferroelectric transducers

  • US 5,925,969 A
  • Filed: 10/17/1996
  • Issued: 07/20/1999
  • Est. Priority Date: 10/17/1995
  • Status: Expired due to Term
First Claim
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1. A ferroelectric transducer, comprising:

  • a rigid frame having a base plate, a roof plate, and a plurality of side walls;

    supporting plate means immovably affixed to opposite ones of said side walls and located above and spaced from said base plate;

    a first ferroelectric stack the lower end of which bears upon said supporting plate means;

    a second ferroelectric stack the lower end of which bears upon said supporting plate means;

    a yoke plate overlying said ferroelectric stacks and provided on its lower face with first and second elongated, parallel indentations, each of which indentations overlies one of said ferroelectric stacks;

    a first roller disposed between said yoke plate and the upper end of said first ferroelectric stack and engaged with one of said indentations;

    a second roller disposed between said yoke plate and the upper end of said second ferroelectric stack and engaged with the other one of said indentations;

    depressor means for exerting downward force on the top of said yoke plate and thus pressing said rollers against the respective upper ends of said ferroelectric stacks;

    anchor plate means immovably affixed to opposite ones of said side walls and juxtaposed to said yoke plate in a predetermined juxtaposition when said first and second ferroelectric stacks are unexcited; and

    flexure plate means affixed adjacent its opposite ends to said yoke plate and to said anchor plate means respectively, whereby to prevent transverse motion of said yoke plate with respect to said ferroelectric stacks, and at the same time to permit tilting or rocking motion of said yoke plate.

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