Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1991-05-29
1992-06-16
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
310366, 12866203, H01L 4108
Patent
active
051229935
ABSTRACT:
A piezoelectric transducer having plural piezoelectric transducer elements which can generate mechanical vibrations converging substantially on one point. The transducer is formed to control the convergent point by insulating piezoelectric transducer elements mechanically, arranging them concentrically and driving them independently and separately from each other.
REFERENCES:
patent: 4012952 (1977-03-01), Dory
patent: 4217516 (1980-08-01), Iinuma et al.
patent: 4424465 (1984-01-01), Ohigashi et al.
patent: 4440025 (1984-04-01), Hayakawa et al.
patent: 4734963 (1988-04-01), Ishiyama
The Random House College Dictionary, Random House, Inc. 1980, p. 393.
Hikita Kazuyasu
Kanai Harumi
Tanaka Yoshiaki
Mitsubishi Mining & Cement Co. Ltd.
Steinberger Brian S.
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