An old switch drive, seen lying around open at the station of Horrem on 9
November 2002. The electric motor in the background drives the horizontal wheel
in the middle, which operates the rod connection to the tongues. The parts in
the foreground look like electrical switches.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>