Stress relief for flextensional transducer

Details Stress relief for flextensional transducer Stress relief for flextensional transducer

1981-07-06

1983-12-13

Tudor, Harold J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367155, 367159, 367172, 310337, H04R 1700

Patent

active

044208260

ABSTRACT:
This invention is a device that permits a flextensional transducer to function after the flextensional transducer experiences a pressure equal to or greater than the pressure found at the survival depth of prior art flextensional transducers. The foregoing is achieved by not bonding at least one end of the transducer's piezoelectric stack to the transducer's shell and having the other end or ends of the piezoelectric stack held in the vicinity of the transducer's shell by a pair of guide rails, etc. This permits the transducer's shell to move away from at least one end of the piezoelectric stack at pressures equal to or greater than the pressure at which the stack would experience tensile stresses in a conventional flextensional design. Thus, the piezoelectric stack will not fracture since it receives no tensile stress. Hence, when the transducer experiences a hydrostatic pressure less than the pressure at the survival depth, the shell of the transducer will recontact the free end of the piezoelectric stack permitting the transducer to function.

REFERENCES:
patent: 3241099 (1966-03-01), Elston et al.
patent: 3258738 (1966-06-01), Merchant
patent: 3274537 (1966-09-01), Toulis
patent: 3277433 (1966-10-01), Toulis
patent: 3749948 (1973-07-01), Morris
patent: 3813744 (1974-06-01), Morris

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