The First Clock for Peter Henlei in 1510

The need to control the time ancient civilizations are guided by day and night or the cycles of the moon.

Also, later came to create the Sundial. The which was based on the shadow, which projected an element of wood, stone or other direction. The Egyptians also created clock, which was based on the passage of water.

Similarly, the Arabs mediate time with astronomical type calculations which were known in his time, for high accuracy of their predictions.

Another clock that was invented, which was quite reliable at the time, was the hourglass. This uses two databases of glass, which are joined by a small hole where sand, a compartment to another. These usually measured during one hour.

Thus we arrive at the 13th century a.d., which begin to manufacture, the first more or less accurate clocks. These were designed to measure the canonical, hours in European monasteries.

Who invented the pendulum, clock the most accurate of its time, was the Christian Huygens clockmaker. This occurred in the 17TH century.

With regard to transportable or small clocks, they made their appearance in society, the year 1524. It was Peter Henlein, who invented the first pocket watch. Apparently, this pocket, in its infancy, watches only had an hour autonomy. Pass it, had to give them rope, so continue to function.

Today, there are even atomic clocks. The atomic clock is the most accurate clock worldwide. And it is used to measure the world, time consistent with the rotation of the Earth clock. Backlog that presents the atomic clock, is much less than a second for each year that passes.