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Patent Searching and Data


Title:
ELECTROACOUSTIC TRANSDUCER
Document Type and Number:
Japanese Patent JPS5696599
Kind Code:
A
Abstract:
A method of making an acoustic transducer for telephones consists of securing the magnet assembly and the armature supporting ring inside the plastic casing of the transducer and then surrounding or partly surrounding these with a thermosetting resin such as epoxy resin, poured inside the casing. The core, the armature supporting ring and the outer edge of the casing are then machined with reference to the magnet face to the required very small tolerances, the cured resin holding the parts securely during the machining operations.

Inventors:
FUREDERITSUKU SUTAINAA
Application Number:
JP14676680A
Publication Date:
August 04, 1981
Filing Date:
October 20, 1980
Export Citation:
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Assignee:
PLESSEY OVERSEAS
International Classes:
H04R13/00; H04R11/00; (IPC1-7): H04R13/00