Dating french clocks
A major advance occurred in Europe around 1300 with the invention of the escapement, which allowed construction of the first mechanical clocks, which used oscillating timekeepers like balance wheels.
The next development in accuracy occurred after 1656 with the invention of the pendulum clock.A major stimulus to improving the accuracy and reliability of clocks was the importance of precise time-keeping for navigation. The development of electronics in the 20th century led to clocks with no clockwork parts at all.The timekeeping element in every modern clock is a harmonic oscillator, a physical object (resonator) that vibrates or oscillates repetitively at a precisely constant frequency.This object can be a pendulum, a tuning fork, a quartz crystal, or the vibration of electrons in atoms as they emit microwaves. Digital clocks display a numeric representation of time.Devices operating on several physical processes have been used over the millennia.A sundial shows the time by displaying the position of a shadow on a flat surface.
There are a range of duration timers, a well-known example being the hourglass.
Water clocks, along with the sundials, are possibly the oldest time-measuring instruments.
A clock is an instrument to indicate, keep, and co-ordinate time.
The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell".
A silent instrument missing such a striking mechanism has traditionally been known as a timepiece.
The clock is one of the oldest human inventions, meeting the need to consistently measure intervals of time shorter than the natural units: the day, the lunar month, and the year.