The History of Timekeeping

Sundial

Clepsydra

Astrolabe

Candle Clock

Sandglass

Mechanical Clock

Spring-Driven Clock

Pendulum Clock

Quartz Clock

Cesium Atomic Clock

 

Candle Clock
  The candle clock was first recorded having been used in the 9th century A.D. However, some people assume that it is much older. The candle clock was designed to with stand most affects of weathering that around this time may have proven harmful to such a device. These clocks were unable to the tell the actual time, but nevertheless, were able to tell how long an event may have been. This was done by the marks placed on both sides of the candle which identified periods of time. These candle clocks also served as timers when a nail was placed in an area that indicated the time that it was to be set off. When the wax around the nail melted, it enabled the nail to fall to a plate below.