(57) The mechanism has an axle supporting a series of aligned cylinders, one of which
is the driver cylinder and the rest are the driven ones. Between the driver cylinder
and the adjacent driven cylinder there is a fly-wheel that flips over the driven cylinders
during digit carry, causing the display number to change suddenly. The fly-wheel has
a very unbalanced mass which during half a turn is dragged along until it reaches
its highest point, from which it is accelerated by way of its own inertia. When the
fly-wheel mass reaches its lowest point, the fly-wheel strikes the pinion driving
the adjacent driven cylinder, adding one unit to its numeric display, and eventually
to that of the remaining driven cylinders. The mass is removable from the fly-wheel
to allow the mechanism to be adjusted for precise operation; the driver cylinder is
solidary to the gear-wheel driving it and all reverse transmission is avoided, so
that the sensitivity determined by the driver cylinder is maintained.
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