Piezoelectric transducer

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Piezoelectric transducer
Country US
Patent number 2640889
Reference US2640889 

A piezoelectric transducer is an effect by which barium titanate or barium strontium are bonded with a ceramic binder. It is attained by the unidirectional electric polarizing field after subjecting the polycrystalline aggregate. The remaining saturation is called to have a piezo-electric effect. The patent for the invention was filed on May 17, 1949 and granted on June 2, 1953. [1]

Description

Piezoelectric transducer

  • Inventor: Walter L. Cherry
  • Patent number: 2640889
  • Filing date: 17 May 1949
  • Issue date: 2 June 1953

Abstract

I claim
(1) A piezo electric transducer comprising a composite bimorphic element including a pair of juxtaposed polycrystalline aggregiate bodies and having permanent piezo electric properties with the direction of the piezo eleetric axis different in adjacent portions of each of said bodies.
(2) A piezo electric transducer comprising a composite bimorphie element including a pair of juxtaposed polycrystalline aggregate bodies and having permanent piezo electric properties with the direction of the piezo electric axis different in longitudinally adjacent portions of each of said bodies.

(3) A piezo electric transducer comprising composite bimorphic element including a pair juxtaposed thin substantially diamond polycrystalline aggregate bodies and having permanent piezo electric properties.

Images

Referenced by

  • US patent 3986061, Kazuma Susuki; Takahiro Kurosawa, "Piezoelectric ignition device", issued 12 October 1976 

References

  1. US patent 2640889, Walter L. Cherry, "Piezoelectric transducer", issued 2 June 1953