Posted by Lindy,
In 1656 a Mr. Christiaan Huygens, invented the pendulum wall clock. Pendulum Wall Clocks were a much more accurate clock for telling the time. These clocks worked with momentum and a series of gears. The one disadvantage to pendulum clocks, was they did have to be restarted when the momentum ran out. Pendelum locks were a very cool invention but in the 19th century the battery was invented to power clocks. After batteries came about, pendulum clocks became a distant memory.When it comes to Wall Clocks, the Quartz crystal was a truly great invention. It was invented in 1920 and works in a very interesting way. With a very low voltage of power the Quartz crystal begins to vibrate, this makes the clock run. This movement makes these clocks very precise, which is why wall clocks today are still run on Quartz crystals.