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Publication of ES224684A1publicationCriticalpatent/ES224684A1/en
Improvements in the electro-acoustic transformers, characterized in that in the air slit of a ferromagnetic circuit constituted by coil and core, a permanent magnet linked with the mechanically vibrating elements and parallel to the polar surfaces that limit the air slit is disposed in vibrations. And magnetizes itself perpendicular to the direction of its movement. (Machine-translation by Google Translate, not legally binding)
ES0224684A1954-10-281955-10-27Improvements in electroacoustic transformers (Machine-translation by Google Translate, not legally binding)
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