AN INVENTION CREATED BEFORE THE XX CENTURY:

Clock is called an instrument for measuring time. There are several types according to purpose: To determine the current time (wristwatch). Measure the length of an event (stopwatch) ... The clocks are used since antiquity. As has been evolving science and technology of manufacture, new models have emerged with greater precision, better poise and lower cost of manufacture. It is perhaps one of the most popular instruments in the world. There are also various types of clocks and analog or digital (operating with a small electric battery.)

Regarding the history of this invention: The ancients knew several species of clocks (the water clock, the air, the sun and other species that are unknown to us). The Egyptians measured with a sundial or water clock movements from the Sun. Sundials were invented in Egypt at the time of the Ptolemies. It is believed that the great weight and wheel clocks were invented in the West by the Benedictine monk Gerbert (late X century) or Richard Wasigford, England, who lived about 1326, because apparently the invention of Gerbert, was not more than a sundial. In Spain, the first clock tower was the cathedral of Barcelona. The first pocket watches imagined building was Peter Bell. Later, Huygens divided the hour into 60 minutes and 60 seconds latter. In 1647, the Geneva Gruet clock applied to the chain of steel used to transmit motion to the cone drum.

SIGNED BY: HUGO DEL VALLE CORTE (HDVC)