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Individual
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Individual
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Priority to ES1977231812UpriorityCriticalpatent/ES231812U/es
Publication of ES231812UpublicationCriticalpatent/ES231812U/es
Alarma de puerta perfeccionada, caracterizada por comprender, una pieza en forma de cuña, con una placa de material antideslizante, estriado en su base, el cual se coloca en el suelo tras la puerta, de forma que cuando se abre esta, a la vez que se acuña evitando mes apertura, suena una estridente chicharra ya que se cierra el circuito eléctrico interno, alimentado con pilas, por la tapa superior de la cuña que venciendo un muelle de recuperación, acciona un contacto que la pone en funcionamiento.
ES1977231812U1977-11-041977-11-04Alarma de puerta perfeccionada.
PendingES231812U
(es)