AT28786B - Circuit for the microphone handsets in central battery telephone systems. - Google Patents

Circuit for the microphone handsets in central battery telephone systems.

Info

Publication number
AT28786B
AT28786B AT28786DA AT28786B AT 28786 B AT28786 B AT 28786B AT 28786D A AT28786D A AT 28786DA AT 28786 B AT28786 B AT 28786B
Authority
AT
Austria
Prior art keywords
microphone
circuit
telephone systems
short
central battery
Prior art date
Application number
Other languages
German (de)
Original Assignee
Telephon Apparat Fabrik E Swie
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
Priority claimed from DE1905173532D external-priority patent/DE173532C/de
Application filed by Telephon Apparat Fabrik E Swie filed Critical Telephon Apparat Fabrik E Swie
Application granted granted Critical
Publication of AT28786B publication Critical patent/AT28786B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Schaltung für die Mikrotelephon-Handapparate bei Zentralbatterie-Fernsprechanlagen. 



   Bei   Zentralbatterie-Fernsprechanlagen   mit selbsttätiger Schlusszeichengabe soll bekanntlich das   Schlusszeichen   erst erscheinen, wenn die Teilnehmer nach Beendigung des (Te- 
 EMI1.1 
 jedoch   mit Mikrotelephon-Handapparaten ausgestattet,   so erscheinen bisweilen die Schlusszeichen bereits dann, wenn die Teilnehmer ihre Mikrotelephone, beispielsweise weil sie ihren Platz verlassen müssen, aus der Hand legen. In diesem Falle können sich nämlich 
 EMI1.2 
 flir   gewöhnlich,   beispielsweise über eine im Griffe des Mikrotelephones angeordnete Taste kurzgeschlossen ist und lediglich   beim Sprechen durch Offnen dieses Kurzschlusses ein-   geschaltet wird. 



     Das Amt A   der auf der Zeichnung   dargestellten Fernsprechantage   ist in bekannter Weise geschaltet, ebenso die Teilnehmerstelle B mit Ausnahme des nach vorliegender Erfindung über die in dem Griffe des Mikrotelephones a angeordnete Taste b geführten Kurzschlusses zu dem Mikrophone c. Es ist ohne weiteres ersichtlich, dass, so lange die 
 EMI1.3 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Circuit for the microphone handsets in central battery telephone systems.



   In the case of central battery telephone systems with automatic closing signals, the closing signal should only appear if the participants after the end of the (tele-
 EMI1.1
 but equipped with microtelephone handsets, the final characters sometimes appear when the subscribers put down their microtelephones, for example because they have to leave their place. In this case, namely
 EMI1.2
 for is usually short-circuited, for example via a button arranged in the handle of the microtelephone, and is only switched on by opening this short-circuit when speaking.



     The office A of the telephone system shown in the drawing is switched in a known manner, as is the subscriber station B with the exception of the short circuit to the microphone c, which is carried out according to the present invention via the button b arranged in the handle of the microtelephones a. It is readily apparent that as long as the
 EMI1.3
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

mit selbsttätiger Schlul3zeichengabe und Kurzschliessung der Sprechapparatc auf der Teil- nehmerstelle im RUhezustande der Leitung, dadurch gekennzeichnet, dass lediglich das Mikrophon bei Nichtgebrauch, beispielsweise über eine im Girffe des Mikrotelephones an- geordnete Taste kurzgeschlossen ist. dagegen beim Sprechen selbst durch oeffnen dieses Kurz- EMI1.4 die Teilnehmerstelle auch dann aufrecht zu erhalten, wenn während des Gespräches das Mikrotelephon fortgelegt wird und infolgedessen die Kohlenkörner des Mikrophones keinen oder nur einen se@lechten Kontakt bilden sollten. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. with automatic key signaling and short-circuiting of the speech device on the subscriber station when the line is idle, characterized in that only the microphone is short-circuited when not in use, for example via a button located in the giraffe of the micro-phone. on the other hand, when speaking by opening this short EMI1.4 to maintain the subscriber station even if the microphone is put down during the conversation and as a result the grains of coal of the microphone should not make any contact or only make contact. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT28786D 1905-08-10 1906-07-02 Circuit for the microphone handsets in central battery telephone systems. AT28786B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1905173532D DE173532C (en) 1905-08-10

Publications (1)

Publication Number Publication Date
AT28786B true AT28786B (en) 1907-06-25

Family

ID=5690916

Family Applications (1)

Application Number Title Priority Date Filing Date
AT28786D AT28786B (en) 1905-08-10 1906-07-02 Circuit for the microphone handsets in central battery telephone systems.

Country Status (1)

Country Link
AT (1) AT28786B (en)

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