Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1993-09-30
1995-07-11
Eldred, J. Woodrow
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367185, 181166, 181172, 381193, 381202, H04R 2500
Patent
active
054327580
ABSTRACT:
An electroacoustic transducer having a diaphragm and a magnetic driving portion respectively housed in a housing wherein the magnetic driving portion vibrates the diaphragm magnetically in response to an electric signal. A base member for closing an opening at the rear side of the housing is formed of a metallic plate. Lead portions are provided by extending both ends of a coil of the magnetic driving portion. Terminal patterns are formed on a surface of the base member with an insulating film between them. The lead portions of the coil of the magnetic drive portion are connected to the terminal patterns.
REFERENCES:
patent: 4234766 (1980-11-01), Cacho
patent: 4395598 (1983-07-01), Lesage
patent: 4823110 (1989-04-01), Dorward et al.
patent: 4843628 (1989-06-01), Hofer
patent: 4944017 (1990-07-01), Cognasse et al.
patent: 5091958 (1992-02-01), Sakamoto et al.
Eldred J. Woodrow
Star Micronics Co. Ltd.
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