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Individual
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Priority to ES0259511ApriorityCriticalpatent/ES259511A1/en
Publication of ES259511A1publicationCriticalpatent/ES259511A1/en
Improvements in the intercoms, characterized by connecting to the input of a low frequency amplifier of the central station, the secondary of a mixer transformer provided with two primaries, one of which is connected to a low impedance microphone of said central station, while the second primary is in turn connected to the microphone of the secondary station; and, by means of the secondary of the output transformer of the amplifier, feed the loudspeaker of the central station and that of the secondary station, simultaneously. (Machine-translation by Google Translate, not legally binding)
ES0259511A1960-06-271960-06-27Improvements in intercommunicators (Machine-translation by Google Translate, not legally binding)
ExpiredES259511A1
(en)