How does an anniversary clock work?
400 day clocks are mechanical clocks that require the use of a torsion pendulum; hence they too are called torsion clocks or torsion pendulum clocks. Instead of typically swinging right and left, the pendulum rotates clockwise and counter-clockwise and is the main reason why it consumes less energy allowing the clock to function for a year without constant human intervention. Torsion pendulums are weighted disks or wheel that is often decorative and is composed of 3 or 4 chrome balls or ornate spokes, suspended by a thin wide or ribbon called a torsion spring. It was first invented by Robert Leslie in 1973. A weighted disk is attached to the torsion spring that powers the clock’s gears as it twists. An anniversary clock’s design works much the same way as a watch’s balance wheel and hairspring. The internal gears of an anniversary clock energizes the torsion spring. Torsion clocks such as 400 day clocks are usually delicate and temperature and humidity fluctuations alters the elasticit
