I designed and built an automatic weight for a tower clock.
The operating principle is called “Monkey up the rope.” Essentially, the weight contains a gear motor and lead plates. The motor winds itself up the chain when it has descended to a certain level. This system has the advantage of keeping the pendulum constantly loaded. Another advantage is that the application not requires machining or mechanical modifications to the antique clock. I’ve made a dozen of them, and they’ve been working perfectly for over five years. The overall weight is adjustable using additional plates and varies from 12 to 25 kg.
