Who invented the clock? When was it invented?

From BC 140 to BC 100, the ancient Greeks made timepieces consisting of 30 to 70 gear systems for the Olympic Games. This instrument, named "Antichi Sila Instrument", consists of 29 interlocking copper gears and several dials, which is equivalent to the size of a lunch box. It was found in 190 1 year on an ancient shipwreck near the Greek island of Antikythera, hence its name.

1350, Danti, an Italian, made the first mechanical clock with simple structure, with a daily difference of 15 ~ 30 minutes, and the indicating mechanism was only an hour hand; 1500 ~ 15 10, Henleith of Germany first replaced the heavy hammer with a steel spring and created a small mechanical clock with a crown wheel escapement mechanism. 1582 or so, Galileo of Italy invented the gravity pendulum; 1657, huygens of the Netherlands introduced the gravity pendulum into the mechanical clock and founded the pendulum clock.