11. The rotating shaft is connected to an electrical generator which converts the motion of the shaft into electrical energy. 12. The modification consisted of mounting the motor behind the control panel with its rotating shaft extended through the panel. 13. Most practical mechanical analog computers of any significant complexity used rotating shafts to carry variables from one mechanism to another. 14. Another category, not nearly as well known, used rotating shafts only for input and output, with precision racks and pinions. 15. The current generated in the magneto is transmitted by wires attached to the rotating shaft to the dynamo's rotating field coil. 16. When a pump operates, the liquid could leak out of the pump between the rotating shaft and the stationary pump casing. 17. The two propellers are powered by two meshing and counter-rotating shafts , powered by helical gear wheels running in an oil bath. 18. Occasionally some of the bearings that held the rotating shaft would wear out, Houghtaling says, and those units simply ceased to vibrate. 19. The " Auto-Meter " used a magnet attached to a rotating shaft to induce a magnetic pull upon a thin metal disk. 20. For instance, they are able to levitate a rotating shaft and permit relative motion with very low friction and no mechanical wear.
