Weight Driven Clocks
There are two basic types of mechanical clocks, those powered by weights and those powered by springs. Weight-driven clocks came first, used in churches and monasteries beginning in the 13th century. The heaviness of a clock’s weights powers its movement (the network of gears and pins that move the hands of the clock), which is regulated by the escapement. In 1650, pendulums were added to clocks to make them more accurate. Weights were...