AT76926B - Circuit arrangement for several call stations on a common line with stepping mechanisms. - Google Patents

Circuit arrangement for several call stations on a common line with stepping mechanisms.

Info

Publication number
AT76926B
AT76926B AT76926DA AT76926B AT 76926 B AT76926 B AT 76926B AT 76926D A AT76926D A AT 76926DA AT 76926 B AT76926 B AT 76926B
Authority
AT
Austria
Prior art keywords
common line
circuit arrangement
several call
call stations
stepping mechanisms
Prior art date
Application number
Other languages
German (de)
Original Assignee
Mix & Genest Telephon & Telegr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mix & Genest Telephon & Telegr filed Critical Mix & Genest Telephon & Telegr
Application granted granted Critical
Publication of AT76926B publication Critical patent/AT76926B/en

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  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Description

  

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  Schaltungsanordnung für mehrere an einer gemeinsamen Leitung liegende Sprechstellen mit   Schritt8chaltwerken.   



   Gegenstand der Erfindung bildet eine Schaltungsanordnung für Fernsprechanlagen. bei denen die Sprechstellen an einer gemeinsamen Leitung liegen und Schrittschaltwerke zum wahlweisen Anruf und zur Erzielung eines Geheimverkehrs besitzen. Das Neue der Erfindung besteht darin. dass bei Beginn eines Anrufs der Sendestromkreis für die Fortbewegung der Schaltwerke und der Stromkreis für ein den Sprechapparat einschaltendes Relais an sämtlichen Sprechstellen unterbrochen und nur an   der rufer-den Stelle   durch einen neuen Weg ersetzt wird. während der Stromkreis für das Einschaltrelais der verlangten Station an einer durch die Fortbewegung des Schaltwerks herbeigeführten und nur dieser Station zugeordneten Kontaktstelle eingeschaltet wird.

   Diese Anordnung hat den Vorzug der Einfachheit und gestattet es gleichzeitig. dass unter Umstanden die Verriegelung der einzelnen Sprechstellen während eines Gesprächs aufgehoben werden kann. Zu diesem Zweck ist ein plombietzter oder anderweitig unter Ver-   schluss befindlicher   Schalter vorgesehen, welcher in dringenden Fällen auch während eines Ge- 
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  Circuit arrangement for several call stations on a common line with step controls.



   The invention forms a circuit arrangement for telephone systems. in which the intercom stations are on a common line and have step-by-step switches for optional calls and to achieve secret traffic. The novelty of the invention consists in this. that at the beginning of a call the transmission circuit for the movement of the switchgear and the circuit for a relay that switches on the intercom is interrupted at all intercom stations and only replaced by a new path at the calling point. while the circuit for the switch-on relay of the required station is switched on at a contact point which is brought about by the movement of the switching mechanism and is only assigned to this station.

   This arrangement has the merit of simplicity and allows it at the same time. that, under certain circumstances, the locking of the individual microphone units can be unlocked during a call. For this purpose, a sealed or otherwise locked switch is provided, which in urgent cases can also be used during operation.
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AT76926D 1916-02-09 1917-03-08 Circuit arrangement for several call stations on a common line with stepping mechanisms. AT76926B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE76926X 1916-02-09

Publications (1)

Publication Number Publication Date
AT76926B true AT76926B (en) 1919-06-25

Family

ID=5637638

Family Applications (1)

Application Number Title Priority Date Filing Date
AT76926D AT76926B (en) 1916-02-09 1917-03-08 Circuit arrangement for several call stations on a common line with stepping mechanisms.

Country Status (1)

Country Link
AT (1) AT76926B (en)

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