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Individual
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Individual
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Priority to ES0074955UpriorityCriticalpatent/ES74955Y/en
Publication of ES74955UpublicationCriticalpatent/ES74955U/en
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Publication of ES74955YpublicationCriticalpatent/ES74955Y/en
"CHILD RADIO RECEIVER" which is characterized by a circuit formed by an electromagnetic coupling of two coils wound one after another on a common insulating cylinder inside which there is a ferromagnetic core axially displaceable from the outside and a contact detector metallic so that when both elements are connected to an antenna and ground through a pair of tweezers, they produce the excitation of a dynamic receiver at sound frequencies that depend on the electromagnetic waves picked up by the antenna. (Machine-translation by Google Translate, not legally binding)
ES0074955U1959-07-141959-07-14
Children's radio receiver
ExpiredES74955Y
(en)
A warning device-switch with acoustic and luminous signal for receivers of television, radio and other electrical appliances (Machine-translation by Google Translate, not legally binding)