All clocks function by tallying up a constantly recurring event with a known frequency. For grandfather clocks, this is the swinging of a pendulum.

A pendulum escapement of this type is only one of many varieties that have been produced over the long history of clockmaking. Our colleague [Manuel Rodriguez-Achach] took a look at some of them ...

Pendulum clocks synchronise using sound pulses, scientists discover Scientists have puzzled over the mystery for 350 years Rose Troup Buchanan Sunday 26 July 2015 11:33 BST 0 Comments ...

Q: My husband and I purchased a beautiful Howard Miller pendulum wall clock in 1994. It worked well until a few months ago, when it began adding two chimes, one at five minutes before the hour and ...

The 350-year-old mystery of why pendulum clocks hanging from the same wall can influence each other and synchronize over time may hold even more secrets than previously thought, researchers say ...

This article was originally published with the title “A Compensating Clock Pendulum” inScientific American Magazine Vol. 13 No. 47(July 1858), p. 371doi:10.1038/scientificamerican07311858-371f ...

Each time that energy pulse travels, it tends to push one clock's pendulum in time with the other. The experiment takes up to 18 hours or even days to run, because the clocks synchronize slowly.