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LUMBRERAS JOSE
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LUMBRERAS JOSE
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Priority to ES0006556UpriorityCriticalpatent/ES6556Y/es
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Publication of ES6556YpublicationCriticalpatent/ES6556Y/es
Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor
(AREA)
Abstract
Un timbre eléctrico de membrana vibratoria para corriente alterna caracterizado porque se compone de una caja en cuyo interior se.aloja un electro-iman desplazable por medio de una tuerca y un muelle con lo que-se consigue que se aparte mas o menos dé la membrana y como consecuencia que el sonido del timbre sea más o menos fuerte.
ES0006556U1941-05-301941-05-30Timbre eléctrico de membrana vibratoria para corriente alterna.
ExpiredES6556Y
(es)
Fremgangsmaade og Apparater til Omsætning af Lydsvingninger til elektriske Svingninger med et i Forhold til Lydsvingningerne indskrænket Amplitudeomraade.