Doorbell

Of ring is known, an acoustic signaling device, consisting of a metallic resonance body (bell) and a hammer for exciting the vibration. Unlike bell ringing are not excited by single shock, but several times a continuous beep. As well as electronic bell ringing are referred to as ringing melody.

The derived term ring is also used for acoustic signals, which are now no longer generated by actual ringing, especially phones ( ringtones ), electronic alarm clock and electronic door bells.

The purpose of a bell is to attract the attention of the addressee by the ringtone.

Mechanical ringing

• Doorbell It is rare to find in the 21st century mechanical doorbells. They were once to be operated by Drehknäufe or cables and an alternative to the knocker.

Electromechanical ringing

Electromechanical ringing work with a Wagner's hammer or oscillating armature. The Wagnerian hammer is indeed suitable for AC and DC, but is caused by the switching processes in operating radio interference and voltage peaks, while the oscillating Anke version though works only with AC power, but it is totally radio suppressed.

There are also versions with two different lengths of tubes or plates. When you press the call button, an electromagnet pulls to a clapper and strikes the shorter tube or plate. When you release the clapper snaps back and strikes the second tube or plate.

• Doorbell: The doorbell is a bell whose button is ( timer) mounted next to a door, so that people may be noticeable. The chime itself is usually located in the apartment. Today, the door bell systems are very often combined with electronic door openers. In this way, visitors can be easily inserted. Mostly, doorbells find on the outside of homes, but often also within buildings to protect vulnerable areas. Automatic door bells called Chime.
• Telephone Ringers (hence the 1919 hit Hello, you sweet Klingelfee by Robert Stolz, who was directed to the " Lady of the Office", nor the individual compounds produced at that time by swapping cables )

Bell with Wagnerian Hammer

Enlarge Third picture (by clicking ) to see the lines described here!

The parts of the door bell are:

• Electromagnet ( bobbins of wood wrapped ) (thin light green line )
• Bell ( thin pink line)
• Clapper (thick dark green line )
• Spring that holds the clapper and makes electrical contact ( thin blue line )
• Screw of the breaker contact ( thick dark blue line)
• Contact point of the breaker contact ( oval with thin red line)

Function:

Bim - Bam chime

The parts of the Bim - Bam - door gongs are:

• Solenoid (thin light green line in the second chart above)
• Tonstäbe ( thin pink line)
• Clapper (thick dark green line )

Function:

Electronic ringing

With the advent of electronics, it was expanded possibilities for creating ringtones. For mobile phones, electronic ringtones were used from the beginning. Even with these alarm clocks are often used. Ringtones could be programmed. Common 3-tone ICs for home doorbells are eg SAB 600 and SAE 800 Modern circuits made ​​it possible to replace the signals previously used for ringtones by recordings of tunes.

School Bells

To comply with the school hours in schools, automatic school bells were installed at many schools. Here are a central device a signal to audio devices that are distributed throughout the school building. Today loudspeaker systems have replaced the electromagnetic ringing. Most of them are also used for announcements and have an alarm function integrated.