AT51908B - Circuit arrangement to prevent the interception of dispatches. - Google Patents

Circuit arrangement to prevent the interception of dispatches.

Info

Publication number
AT51908B
AT51908B AT51908DA AT51908B AT 51908 B AT51908 B AT 51908B AT 51908D A AT51908D A AT 51908DA AT 51908 B AT51908 B AT 51908B
Authority
AT
Austria
Prior art keywords
line
dispatches
circuit
circuit arrangement
interception
Prior art date
Application number
Other languages
German (de)
Inventor
Benno Schwanzer
Original Assignee
Benno Schwanzer
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 Benno Schwanzer filed Critical Benno Schwanzer
Application granted granted Critical
Publication of AT51908B publication Critical patent/AT51908B/en

Links

Landscapes

  • Monitoring And Testing Of Transmission In General (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
 EMI1.2 
 

 <Desc/Clms Page number 2> 

 
 EMI2.1 
 gleicher Beschaffenheit sind. Gedacht ist die Anwendung dieser Erfindung hauptsächlich für den militärischen Telegraphen. 



   Die gleichzeitige Benützung der Leitung für phonische und mündliche Korrespondenz erfolgt durch Verbindung der Leitungsdrähte LI und   Zg   mittels Anschaltspule und der Ein-oder Anschaltung von Mikrophonkassetten. Ebenso können durch einfaches Umschalten diese Stationen auch für den bisher üblichen Telegraphenbetrieb sowie für die Baubeobachtung und Linienuntersuchung verwendbar sein.



   <Desc / Clms Page number 1>
 
 EMI1.1
 
 EMI1.2
 

 <Desc / Clms Page number 2>

 
 EMI2.1
 are of the same quality. The main application of this invention is intended for the military telegraph.



   The simultaneous use of the line for phonic and verbal correspondence is achieved by connecting the lead wires LI and Zg by means of a switch-on coil and the switching on or off of microphone cassettes. Likewise, by simply switching over, these stations can also be used for the previously common telegraph operation as well as for building monitoring and line inspection.

Claims (1)

PATENT-ANSPRUCH : Schaltungsanordnung zur Verhinderung des Abfangens von Depeschen bei Telegraphenanlagen mit Ruhestrombetrieb, gekennzeichnet durch zwei Relais und R ; J, von welchen das eine (RI), solange die Anlage ausser Betrieb ist, in die Linienleitung eingeschaltet ist, bei einer Zeichengebung jedoch stromlos wird und durch seinen Ankerhebel das zweite Relais (ruz) in den Stromkreis einer Lokalbatterie (LB) einschaltet, wodurch der Ankerhebel des Relais (ruz) einerseits dieses selbst in den Linienstrom und andererseits den Schreibapparat (S) in den Lokalstromkreis einschaltet, so dass auch während der Zeichengebung der Linienstrom die Leitung durchfliesst, wobei nur durch genaue Einstellung der Relais in allen Stationen auf gleiche, EMI2.2 PATENT CLAIM: Circuit arrangement for preventing dispatches from being intercepted in telegraph systems with closed-circuit operation, characterized by two relays and R; J, of which one (RI) is switched on in the line line as long as the system is out of operation, but is de-energized when a signal is given and the second relay (ruz) switches on in the circuit of a local battery (LB) through its armature lever, whereby The armature lever of the relay (ruz) switches it on to the line current on the one hand and the writing device (S) to the local circuit on the other, so that the line current flows through the line even during the signaling, whereby only by precisely setting the relays in all stations to the same, EMI2.2
AT51908D 1910-10-10 1910-10-10 Circuit arrangement to prevent the interception of dispatches. AT51908B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT51908T 1910-10-10

Publications (1)

Publication Number Publication Date
AT51908B true AT51908B (en) 1912-01-25

Family

ID=3572963

Family Applications (1)

Application Number Title Priority Date Filing Date
AT51908D AT51908B (en) 1910-10-10 1910-10-10 Circuit arrangement to prevent the interception of dispatches.

Country Status (1)

Country Link
AT (1) AT51908B (en)

Similar Documents

Publication Publication Date Title
AT51908B (en) Circuit arrangement to prevent the interception of dispatches.
DE721906C (en) Circuit arrangement for utilizing subscriber lines in a telephone system for the transmission of messages
AT20475B (en) Circuit for AC telegraphs.
AT156323B (en) Monitoring device for telephone systems with dialer operation.
AT129053B (en) Monitoring device for telegraph systems.
AT28787B (en) Circuit arrangement for telephone main stations.
US1536753A (en) Telegraph system
AT160211B (en) Circuit arrangement for automatic telex exchanges which have pre-authorized subscribers.
AT47789B (en) Circuit arrangement for telephone exchanges with automatic subscriber calls.
AT52126B (en) Signal protection device against theft of beer and air pipes.
AT53943B (en) Circuit for connecting a table station as a secondary station for company line connections.
AT159590B (en) Circuit for telephone systems with central battery or dialer operation.
DE691235C (en) Circuit arrangement for telegraph systems
DE173644C (en)
AT76660B (en) Circuit arrangement for semi-automatic telephone systems with separate adjustment and speech channels.
DE292325C (en)
DE717066C (en) Procedure for checking the operational readiness and the symmetry of modulation circuits in stations for carrier-frequency message transmission
AT74831B (en) Circuit arrangement for telephone systems with dialer operation.
DE964248C (en) Automatic switch with automatic and manual release for telephone systems
AT30256B (en) Circuit arrangement for call counter.
AT8460B (en) Circuit device for telegraphing between two telephone stations connected to one another by a central station.
AT248504B (en) Telegraph dialing system with private branch exchanges
AT152131B (en) Telegraph system with voter operation and preselectors.
DE703508C (en) Circuit arrangement for signaling with alternating currents over telecommunication lines, in particular telephone lines
DE676721C (en) Circuit arrangement for extensions