… and the cylinder is rotated either by a spring‑operated (clockwork) motor which is wound with a key or directly by a … automatons usually enclosed in a cage. A spring‑operated (clockwork) motor in the base of the cage actuates a set of …
… on site, either within a shell or within a structure of brickwork. (B) SUPER-HEATED WATER BOILERS These are boilers … those designed to be combined with boilers by means of a brickwork structure. The heading excludes the types of …
… remain classified here whether or not they incorporate a clockwork recording device, and whether or not they are … of permanent illumination consist essentially of a clockwork driven with one or more windows, a speed …
