What is a spiral wall clock?

What is a spiral wall clock?

It is quite rare to find watches of this type,Nevertheless, they are very interesting and we cannot pass by, although we cannot call them homemade (in general, it is possible to make them by hand, but it is very difficult).Wall clock spiralThe principle of operation is as follows: the spiral is driven intomovement by a small mechanism, while the dial remains motionless. When the spiral is scrolled, the position of the ball changes - it moves up. The ball shows the time, which is marked with numbers on the dial (a minute scale can also be applied). When it reaches the highest mark, it falls into the hole and returns to the bottom of the spiral along the groove. This happens twice a day. The complexity of making spiral watches lies not only in creating a spiral of the right shape and size, but in finding the only correct combination of spiral parameters and mechanism speed. Calculating all this so that the watch is accurate is incredibly difficult.

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