Al-Jazari/ 10S

The Muslim scholar Al-Jazari formed many inventions which we use nowadays such as Saquya chain pump concept which is used in hydro-power modern inventions such as the water sprinkler. he also invented the segmental gear which is used in communicating reciprocating motion from and to a cogwheel used in bicycles.

http://www.flickr.com/photos/myhayah/sets/72157629325318752/