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Seiko Institute of Horology / The isochronism of a pendulum

The Seiko Institute of Horology (now The Seiko Museum) was opened in 1981 as part of a project to commemorate the 100th anniversary of the founding of Seiko. The museum displays research materials related to time and timepieces produced in Japan and other countries around the world. (For more information, see the February 2009 issue of the PR magazine pla-topia.) http://museum.seiko.co.jp/

The isochronism of a pendulum
The isochronism of a pendulum
When Galileo was a student, he observed the swinging of a lamp hanging from the ceiling of a church, and even if the lamp swung significantly or not so much, he noticed that "it took the same amount of time for one complete swing." It does not matter whether the amplitude of the pendulum swing from the central point is large or small. In other words, Galileo discovered in 1583 that the isochronism of a pendulum means that the period is the same.
The isochronism of a pendulum is applied in large mechanical clocks.
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