… . These machines are characterised by the absence of a spindle and the presence of two grinding wheels (an abrasive … . These machines are characterised by the presence of a spindle and a support, that holds and moves the workpiece, …
… they are either fixed to the fingers or mounted on a handle, and are sounded by striking one against the other. … Flexatones consisting of a metal plate mounted on a handle, and two wooden balls placed on either side of the …
… motor which is wound with a key or directly by a handle. In some types, the cylinder may be replaced by a … (or cylinder) set with copper pins which, when turned by a handle, operate valves on wood or metal pipes. (4) …
