AT155879B - Alarm device, in particular for air raid alarms. - Google Patents

Alarm device, in particular for air raid alarms.

Info

Publication number
AT155879B
AT155879B AT155879DA AT155879B AT 155879 B AT155879 B AT 155879B AT 155879D A AT155879D A AT 155879DA AT 155879 B AT155879 B AT 155879B
Authority
AT
Austria
Prior art keywords
alarm device
alarms
air raid
alarm
throttling
Prior art date
Application number
Other languages
German (de)
Inventor
Otto Zecha
Original Assignee
Otto Zecha
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 Otto Zecha filed Critical Otto Zecha
Application granted granted Critical
Publication of AT155879B publication Critical patent/AT155879B/en

Links

Landscapes

  • Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



    Alarmeinrichtung,   insbesondere für Fliegeralarm. 



   Die Erfindung betrifft eine weitere Ausgestaltung der Alarmeinrichtung nach dem Patente
Nr. 146282, deren Wesen in einem in die   Lichtnetzleitung   einer Stadt od. dgl. eingeschaltete, durch besondere Stromquellen, Uhrwerke od. dgl. betätigte Alarmsignale, welche durch Ausschalten oder Drosseln des Netzstromes in Funktion gesetzt werden, besteht. 



   Zweck der Erfindung ist, die Betriebssicherheit der   Alarmeinriehtung   zu erhöhen und diese in ihrem Aufbau zu vereinfachen. Dies wird erfindungsgemäss dadurch erreicht, dass die Alarmsignale mit Hilfe des Netzstromes gegeben werden, der die Alarmeinrichtung durch Drosseln in Funktion setzt. 



  Wird also z. B. durch eine Kabel-oder andere Störung das Netz fast stromlos, so wird wohl die Alarmeinrichtung als solche in Wirksamkeit, die Signaleinrichtung jedoch mangels entsprechend grosser Spannung nicht in Wirksamkeit treten. Dadurch können Störungen des Netzes keinen Einfluss auf die Sicherheit der Funktion der Alarmvorrichtung ausüben. Da möglicherweise bei gewissen Störungen kleine Restspannungen im Netz bestehen bleiben können, kann in vorteilhafter Weise die Empfindlichkeit der Signalisationseinrichtung derart bemessen werden, dass diese Fehl-bzw. Restspannungen sie nicht in Wirksamkeit bringen können. 



   Statt durch Drosseln des Stromes können die Signale der Alarmvorrichtung nach dem Patente Nr. 146282 durch Verwendung von Überspannungsrelais,   Synchronrelais   od. dgl., auch durch Erhöhung der Netzspannung, durch Veränderung der Frequenz desselben bzw. durch Überlagerung einer besonderen Frequenz in Funktion gesetzt werden. 



   PATENT-ANSPRÜCHE :
1. Alarmeinrichtung nach dem Patente Nr. 146282, dadurch gekennzeichnet, dass die Alarmsignale mit Hilfe des Netzstromes gegeben werden, der die Alarmeinrichtung durch Drosseln in Funktion setzt. 

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



   <Desc / Clms Page number 1>
 



    Alarm device, in particular for air raid alarms.



   The invention relates to a further embodiment of the alarm device according to the patent
No. 146282, the essence of which consists of an alarm signal that is switched on or the like into the light network of a city, activated by special power sources, clockworks or the like and activated by switching off or reducing the mains current.



   The purpose of the invention is to increase the operational safety of the alarm device and to simplify its structure. This is achieved according to the invention in that the alarm signals are given with the aid of the mains current, which activates the alarm device by throttling.



  So z. If, for example, the network is almost currentless due to a cable or other disturbance, the alarm device as such will be in effect, but the signal device will not come into effect due to the lack of a correspondingly high voltage. As a result, disturbances in the network cannot influence the safety of the function of the alarm device. Since small residual voltages can possibly remain in the network in the event of certain disturbances, the sensitivity of the signaling device can advantageously be dimensioned in such a way that these faulty or negative voltages occur. Residual stresses cannot bring them into effect.



   Instead of throttling the current, the signals of the alarm device according to patent no. 146282 can be activated by using overvoltage relays, synchronous relays or the like, also by increasing the mains voltage, by changing the frequency of the same or by superimposing a special frequency.



   PATENT CLAIMS:
1. Alarm device according to patent no. 146282, characterized in that the alarm signals are given with the aid of the mains current, which activates the alarm device by throttling.

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

 

Claims (1)

2. Alarmeinriehtung naeh Ansprueh I, dadureh gekennzeiehnet, dass die Alarmsignale statt durch Drosseln des Netzstromes durch Erhöhung der Spannung desselben, ausgelöst werden. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. 2. Alarm device according to claim I, characterized in that the alarm signals are triggered by increasing the voltage of the mains current instead of by throttling the mains current. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT155879D 1936-02-22 1936-02-22 Alarm device, in particular for air raid alarms. AT155879B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT155879T 1936-02-22

Publications (1)

Publication Number Publication Date
AT155879B true AT155879B (en) 1939-04-11

Family

ID=29408448

Family Applications (2)

Application Number Title Priority Date Filing Date
AT146282D AT146282B (en) 1936-02-22 1935-10-22 Alarm device, in particular for air raid alarms.
AT155879D AT155879B (en) 1936-02-22 1936-02-22 Alarm device, in particular for air raid alarms.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT146282D AT146282B (en) 1936-02-22 1935-10-22 Alarm device, in particular for air raid alarms.

Country Status (1)

Country Link
AT (2) AT146282B (en)

Also Published As

Publication number Publication date
AT146282B (en) 1936-06-25

Similar Documents

Publication Publication Date Title
AT155879B (en) Alarm device, in particular for air raid alarms.
DE506749C (en) Control device for earth fault lines in AC systems
DE881466C (en) Alarm system
DE743168C (en) Telecommunication system operated with double current with a monitoring device configured as a power switch and connected to the transmission line
DE429291C (en) Railway signaling device for multi-wing signals
DE644989C (en) Security system against burglary
DE681014C (en) Protection device for direct current generators
AT110049B (en) Signaling system that is activated when a train passes through three track contacts in succession.
DE892764C (en) Arrangement for signaling devices, in particular overhead warning signal systems with flashing lights
DE976343C (en) Track relays with electron tubes or similar elements
DE766104C (en) Switching and monitoring device for signal systems, especially overhead warning signal systems
DE2031813A1 (en) Alarm device
DE587793C (en) Process for the step-by-step introduction of rapid protection systems with the line resistance monitoring minimum relay in line networks
AT103040B (en) Signal system, in particular fire alarm device.
DE804574C (en) Electrically operated display device for bridge damage
AT102095B (en) Fire alarm system with alarm devices arranged in a loop and operated by alternating current.
DE714596C (en) Arrangement for monitoring the accumulator batteries used in power plants, switching stations, etc. for the control of switching and protection devices
DE952647C (en) Railway signal system with automatic earth fault indicator, especially for overhead warning signal systems
DE904797C (en) Arrangement to identify the return in power converter vessels, which are arranged in series, especially for high-voltage systems
DE830307C (en) Signaling system with closed-circuit loops and power supply from the network
DE614449C (en) Circuit for monitoring the operation of luminous circuit diagrams
DE901646C (en) Electrostatic precipitator
DE484818C (en) Circuit arrangement with several signal points lying on the same line
DE602224C (en) Alarm device for charging rectifier
DE1128792B (en) Circuit arrangement for a closed-circuit monitoring loop