A Kurbelinduktor is a hand-operated dynamo, similar to a crank.  By turning it, an electrical current is generated.

The first telephones required the user to turn the handle to create the current that opened the flap on the Klappenschrank.

These days the Kurbelinduktor technology can be found in wind-up mobile phone chargers and torches.

To hear a simple explanation and a short discussion in German, listen to the podcast:

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About Graham

Graham Tappenden is a British ex-pat who first came to Germany as a placement student in 1993, returning in 1995 to live there permanently. He has been writing for AllThingsGerman.net since 2006. When not writing blog posts or freelancing for the Oberurseler Woche and other publications he works as a self-employed IT consultant solving computer problems and designing websites. In 2016 he gained German citizenship.


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