Piezoelectric ceramic transducers with uniform resonant frequenc

Details Piezoelectric ceramic transducers with uniform resonant frequenc Piezoelectric ceramic transducers with uniform resonant frequenc

1978-09-11

1980-03-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

179110A, 179115R, 179138, 29 2535, 310312, 310321, H01L 4110

Patent

active

041936477

ABSTRACT:
The resonant frequency of piezoelectric transducers is made more uniform from unit to unit by reducing the sensitivity of that frequency to manufacturing variations in the diameter of the ceramic sensing disk that forms a part of the vibratory diaphragm assembly. The diaphragm member proper is stiffened, as by integrally formed radial ribs, within the zone of variability of the disk perimeter, effectively establishing a uniform boundary edge for the diaphragm area that is stiffened by presence of the disk.

REFERENCES:
patent: 1450287 (1923-04-01), Hahnemann
patent: 1589962 (1926-06-01), Hecht et al.
patent: 3777192 (1973-12-01), Barrow
patent: 4050541 (1977-09-01), Henricksen
patent: 4122365 (1978-10-01), Stephens
patent: 4156156 (1979-05-01), Sweany et al.

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