Galileo's pendulum clock, c 1642.

Image number: 10237507

Galileo's pendulum clock, c 1642.

19th century model based on a drawing by Galileo's (1564-1642) friend and biographer, Viviani, of an incomplete pendulum clock which Galileo designed just before his death. It represents the first known attempt to apply a pendulum to control the rate of a clock. Galileo had noticed that the pendulum's period of swing appeared to be independent of the extent of the 'arc' of the swing and recognised its potential for timekeeping, but died before his work could be completed. It was Huygens (1629-1693) in the Hague, Holland, who built the first successful pendulum clock in 1656. The application of the pendulum to clock timekeeping during the scientific revolution of the 17th century was the most fundamental advance in the history of time measurement.

Image number:
10237507
Credit:
Science Museum/Science & Society Picture Library
Date taken:
12 January 2004 13:52
Image rights:
Science Museum