Semi-deadbeat escapement in action. The mainspring was run down approximately 7 days for this movie. This movement belongs to an Ithaca grandfather clock with a Gilbert movement. It was made around 1898 - 1917.
It is semi-deadbeat because there is a very slight amount of recoil when the clock is fully wound and the pendulum is taking a larger swing. (although it is very close to being true deadbeat.)
It is semi-deadbeat because there is a very slight amount of recoil when the clock is fully wound and the pendulum is taking a larger swing. (although it is very close to being true deadbeat.)
Clockhistory 2 years ago
Beautiful video. Why is it called a semi-deadbeat instead of a full deadbeat?
mufTeJd5 2 years ago