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
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)
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) |
-
1935
- 1935-10-22 AT AT146282D patent/AT146282B/en active
-
1936
- 1936-02-22 AT AT155879D patent/AT155879B/en active
Also Published As
Publication number | Publication date |
---|---|
AT146282B (en) | 1936-06-25 |
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