ES471104A1 - Intercommunicator apparatus between two independent telephone lines (Machine-translation by Google Translate, not legally binding)
- Google Patents
Intercommunicator apparatus between two independent telephone lines (Machine-translation by Google Translate, not legally binding)
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ECHEVARRIA ARTECHE IGNACIO
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ECHEVARRIA ARTECHE IGNACIO
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Priority to ES471104ApriorityCriticalpatent/ES471104A1/en
Publication of ES471104A1publicationCriticalpatent/ES471104A1/en
Interconnected Communication Systems, Intercoms, And Interphones
(AREA)
Abstract
Intercom device between two independent telephone lines characterized in that, being especially applicable in those cases in which a subscriber has at least two lines located together allowing an intercommunication between them, it is constituted by a special transformer of three windings in which one of its windings is connected to one of the lines while a second winding is connected to the other, this connection being made by means of separate wires derived from a conductor of each line with its respective coil and through the contacts of a multiple switch, through the which, the second power supply conductor of each of the lines of the telephone sets passes through the convenient contact provided in the switch, such that in a certain position of said switch each of the telephone lines is closed through the corresponding winding of the transformer. (Machine-translation by Google Translate, not legally binding)
ES471104A1978-06-231978-06-23Intercommunicator apparatus between two independent telephone lines (Machine-translation by Google Translate, not legally binding)
ExpiredES471104A1
(en)
Electrical circuit controlled by the unwinding of a magnetic tape for tape recorders of the current type and ensuring by relays and by electromagnets the triggering and reclosing of an ordinary telephone apparatus, as well as the transmission and reception of telephone communications by absence of the subscriber and also the automatic operation of the tape recorder