Pneumatic Clock
One of a series of clocks governed by pulsations of air, sent to them at regular intervals through tubes which are controlled and operated by a master clock.
Repeating clock. The mechanism by which a clock or watch may be made to strike the hours and minutes by pulling or pushing a cord or rod, so as to tell the time without looking at the dial, was invented in 1676 by Wm. Derham. It immediately became popular, and the idea was taken up by many English, French and German horologists. It was at first applied only to clocks, but was subsequently put into watches as well, and forms the origin of the repeating watches of the present day.