Abstract: An adjusting device for adjustable rotor vanes of a machine rotor including a first gear wheel (34) on a machine shaft (2) and a second gear wheel (44) on an adjusting shaft (4), whereby a relative rotation between the machine shaft and the adjusting shaft can be initiated through a transmission (38) by either of two braking devices (12, 22). The adjusting device of the invention makes it possible to adjust the rotor vanes with a simple construction and with a good degree of efficiency while simultaneously providing good accessibility for assembly and service. A further brake (40, 41) is provided between the transmission (38) and the machine shaft (2) or the adjusting shaft (4) to maintain synchronous rotation of the adjusting shaft (4) with the machine shaft (2) during normal operation, i.e., so long as no adjustment of the rotor vanes (64) is to take place.

Abstract: A method and apparatus for forming an optical transmission element having a fiber shaped optical waveguide loosely received in a tubular jacket containing a filling material characterized by introducing a fiber into a jacket as it is being extruded at an elevated temperature, cooling the jacket and fiber to a second temperature below said elevated temperature and above the ambient temperature, coiling the cooled jacket into a coil arrangement and while coiling controlling the rate of introduction of the fiber into the jacket so that the fiber lies on the inner diameter of each radius of curvature of the coil with the amount of retardation of the introduction and the amount of the second temperature above room temperature being arranged so that upon cooling to room temperature, the fiber has the desired length relationship to the length of the jacket.