can move when actuated fig4 is a sectioned view of the nozzle assembly 12 according to one embodiment of the invention referring to fig4 as well as fig3 the vanes 14 are actuated in part by a connection with an actuation ring 34 a pivot pin 36 can extend from the hole 28 of each vane to the actuation ring 34 each pivot pin 36 has a center axis about which each respective vane 14 rotates the actuation ring 34 can be locted or sized otherwise in other embodiments for instance to accommodate use of the nozzle assembly 12 with various existing turbines fig5 illustrates the actuation ring 34 a gear rack 46 and rollers 42 according to one embodiment of the invention referring to fig5 the illustrated actuation ring 34 has three cutout sections 40 with one roller 42 positioned in each cutout section 40 to guide and stabilize the rotational movement of the actuation ring 34 each roller 42 rotates about a roller bolt or roller pin 44 which is secured to the actuation ring 34 this embodiment can be modified depending on the position of the actuation ring 34 the actuation ring 34 also has or is connected to the gear rack 46 the gear rack 46 has gear rack teeth 47 which fit with similar gear shaft teeth not shown on an end of a gear shaft 48 see fig1 and fig2 a fine match between the gear rack teeth 47 and the.