01-22-2013, 12:16 AM
This "gizmo" reminded me of the clock at Monticello, Thomas Jefferson's home near Charlottesville, VA. The clock doesn't produce electricity, but does operate by the pull of gravity on the clock's weights, which must descend through the floor in the foyer into the cellar below.
http://www.monticello.org/site/house-and...reat-clock
http://www.monticello.org/site/house-and...reat-clock