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Publication of DE715550CpublicationCriticalpatent/DE715550C/de
H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
H04Q3/525—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using tubes in the switching stages
Schaltungsanordnung für Fernmelde-, insbesondere Fernsprechermittlungsanlagen, zum Suchen, Wählen und Durchschalten von Verbindungswegen in einem mehrstufigen Koppelfeld
Schaltungsanordnung fuer elektrische Signalanlagen, bei denen ein akustisches Signal mit Hilfe eines mit Starkstrom betriebenen Laeutewerks gegeben wird