Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1988-05-05
1989-07-04
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
310337, 367165, 29 2535, H04R 1700, H04R 3100
Patent
active
048456870
ABSTRACT:
A flextensional sonar transducer assembly includes a stack of piezoelectric elements disposed along a linear axis, a plurality of electrodes disposed between the elements, end pieces disposed at each end of the piezoelectric stack, with the end pieces having outwardly facing, generally arcuate surfaces, a band of material formed into a loop to encircle the stack and end pieces, a flexural shell disposed to circumscribe the band of material to present a generally elliptical side cross-section, with the major axis thereof being generally coincident with the linear axis of the stack, and with the shell being reactively coupled to the arcuate end portions of the band of material so that a transverse movement of the long sides of the shell causes longitudinal compression or expansion of the elongate means and vice versa, and wedge elements positioned between the shell and the arcuate end portions of the band of material for maintaining driving contact between the shell and the end pieces.
REFERENCES:
patent: 2849628 (1958-08-01), Hollmann
patent: 3718897 (1973-02-01), Abbott
patent: 4420826 (1983-12-01), Marshall, Jr. et al.
patent: 4731764 (1988-03-01), Ponchaud
Edo Corporation, Western Division
Steinberger Brian S.
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