Clepsydra, a Medieval Clock

sketchfab

This model is heavily influenced by the architectural designs of Clepsydra Clocks. These instruments, along with sundials and hourglasses, are considered to be among the earliest time-measuring devices ever created. Widespread use of these clocks continued until the invention of mechanical clocks in the late 1300's, making them the primary timekeepers of the medieval period. The steady flow of water through an attached funnel causes water to rise within a container that is connected to a float, and as the float rises, it turns a single hand on the clock slowly. This process is driven by both the steadily rising water level and the rotating gear system. http://www.usgennet.org/usa/topic/preservation/science/inventions/images/pg50.jpg https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=&url=https%3A%2F%2Fmedia.licdn.com%2Fmpr%2Fmpr%2Fshrinknp_400_400%2FAAEAAQAAAAAAAAPQAAAAJGE0MTdjMTJhLTUyMjMtNGE0OS05M2VmLWFlNzI2ZWU0M2E4Yg.jpg&bvm=bv.133178914,d.eWE&psig=AFQjCNESlv6BOYyoQ_d8tsbuby843Kd6bg&ust=1474468887415423