The Clock
 
 
    Leonardo created a clock very similar to the ones we use today.   I contains two seperate systems, one for minutes, and the other for hours.  Each had its own gears and weight.  Always striving for perfection and accuracy, it was important to da Vinci to invent a clock that would tell the time with the best accuracy possible to him in those days.  Weight-driven mechanics were used solely for clocks for a long time, but Leonardo da Vinci took this thinking one step further and used it in many other inventions, the file cutter for example.  Other inventors of his time appreciated da Vinci's two system clock, so that they also could use similar structuresin their own inventions.  Da Vinci wasn't just an inspiration to inventors of our time, but he inspired his peers as well.