Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1990-08-09
1992-06-16
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367162, 310321, H04R 1700
Patent
active
051229927
ABSTRACT:
A support member preferably made of a metal such as cold rolled steel is disposed in a looped configuration and is provided with a gap. A transducer member preferably made of a piezoelectric material such as a ceramic is disposed within the support member. The transducer member is provided with a gap at a position corresponding to the gap in the support member. A closure member made from a suitable springlike material such as an alloy steel is attached to the opposite ends of the support member at the position of the gap as by welding. The closure member extends in a U-shaped configuration into the looped configuration (in section) defined by the support member and the ceramic member. The axial length of the closure member defines the bandwidth of the frequency vibrations generated by the transducer member. When the closure member extends from the gap into the looped configuration to a position near the end of the transducer member and the support member opposite the gap, a bracing member may be disposed between the closure member and the transducer member to brace the closure member. The opposite ends of the closure member are closed as by end caps.
REFERENCES:
patent: 2812452 (1957-11-01), Harris
patent: 2939970 (1960-06-01), Dranietz et al.
patent: 3230504 (1966-01-01), Horan et al.
patent: 4651044 (1987-03-01), Kompahek
patent: 4682070 (1987-07-01), Plambeck
patent: 4887247 (1989-12-01), Black et al.
patent: 5020035 (1991-05-01), Kompanek
Piezo Sona-Tool Corporation
Roston Ellsworth R.
Schwartz Charles H.
Steinberger Brian S.
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