Communications – electrical: acoustic wave systems and devices – Signal transducers
Patent
1986-12-22
1988-06-28
Kyle, Deborah L.
Communications, electrical: acoustic wave systems and devices
Signal transducers
367188, 181148, 381190, 381202, H04R 102
Patent
active
047544406
ABSTRACT:
A transducer includes a cup-shaped diaphragm having a planar portion in the form of a flange. The internal space of the cup is closed by a metallic support plate. A disc-shaped piezoelectric element has electrode layers on its front and rear surfaces, and the front electrode layer is joined to the inner bottom of the cup. An electrical lead is connected to the rear electrode layer of the piezoelectric element and extends along the external surface of the support plate after it is passed through the thickness of the plate and then bent at a right angle. A resilient member is joined to the external surface of the support plate, and an aluminium sheet is joined to the resilient member. The diaphragm is connected to the ground through the support plate, and the aluminium sheet is also connected to the ground.
REFERENCES:
patent: 3100292 (1963-08-01), Warner, Jr. et al.
patent: 3158835 (1964-11-01), Hipkins
patent: 4542489 (1985-09-01), Naruse
patent: 4636997 (1987-01-01), Toyama et al.
patent: 4695985 (1987-09-01), Takeoka
Aisin Seiki Kabushikikaisha
Kyle Deborah L.
Steinberger Brian S.
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