Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1991-11-20
1993-04-27
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367171, H04R 1500
Patent
active
052068390
ABSTRACT:
In the underwater sound source disclosed herein, rigid diaphragms are provided at opposed ends of a hollow shell, the periphery of each of the diaphragms being sealed to the shell. Respective spring means operating between the shell and each of the diaphragms allows axial displacement of the diaphragm in response to external pressure. A lightweight magnetic armature structure is connected to each of the diaphragms and opposed electromagnetic core structures provide magnetic circuits which link each of the armature structures across respective gaps. Further spring means are provided for centering each of the armature structures between the respective magnetic core structures. By appropriately energizing windings on the magnetic core structures, the armatures together with their respective diaphragms are caused to oscillate.
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Bolt Beranek and Newman Inc.
Pahl Jr. Henry D.
Steinberger Brian S.
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