Abstract: In the case of a variable-pitch propeller or repeller according to the invention, the pitch-adjusting device is arranged in the hub and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device comprises an electrical drive device, for moving the blades from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device, for locking the blades in the numerically limited number of different blade pitches.

Abstract: A watercraft and controller are disclosed. An embodiment includes a controller for the water craft being configured to operate at least one drive propeller of the drive system of the watercraft below a first propeller rotational speed according to a first operating state by operating at least one drive motor, connected to the at least one drive propeller, via a first alternating voltage; and operate the at least one drive propeller above the first propeller rotational speed according to a second operating state by operating the at least one drive motor via a second alternating voltage. In a transition from the first into the second operating state or vice versa, the first internal combustion engine is operated at such a rotational speed that the at least one drive propeller is driven at the first propeller rotational speed, and the first alternating voltage is synchronized with the second alternating voltage.

Abstract: A watercraft and controller are disclosed. An embodiment includes a controller for the water craft being configured to operate at least one drive propeller of the drive system of the watercraft below a first propeller rotational speed according to a first operating state by operating at least one drive motor, connected to the at least one drive propeller, via a first alternating voltage; and operate the at least one drive propeller above the first propeller rotational speed according to a second operating state by operating the at least one drive motor via a second alternating voltage. In a transition from the first into the second operating state or vice versa, the first internal combustion engine is operated at such a rotational speed that the at least one drive propeller is driven at the first propeller rotational speed, and the first alternating voltage is synchronized with the second alternating voltage.

Abstract: A drive method is disclosed. An embodiment includes an operation of at least one drive propeller of the drive system below a first predefinable propeller rotational speed according to a first operating state by operating at least one drive motor, connected to the at least one drive propeller, of the drive system via a first alternating voltage. The method further includes operation of the at least one drive propeller above the first predefinable propeller rotational speed according to a second operating state by operating the at least one drive motor via a second alternating voltage. In a transition from the first operating state into the second operating state or vice versa, the first internal combustion engine is operated at such a rotational speed that the at least one drive propeller is driven at the first propeller rotational speed, and the first alternating voltage is synchronized with the second alternating voltage.

Abstract: An adjustable bearing foot assembly for installation in a base plate, for example a base plate of a crane sub-assembly, including a threaded nut comprising an inner thread; a bearing foot having an outer thread; and a securing element with which the bearing foot can be fixed, rotationally secure, in the threaded nut.

Abstract: An apparatus is disclosed for mixing a first stream of a flow medium and a second stream of the flow medium, a temperature of the first and second streams being different. In an embodiment, the apparatus includes at least one mixing apparatus configured as a blade-free fan, including at least one opening and a Coanda surface arranged in the region of the at least one opening. During operation, the first stream emerges from the at least one opening and can be steered by the Coanda surface, wherein the second stream flows in the region of the at least one opening, and wherein the first stream, following the emergence thereof from the at least one opening, is mixable with the second stream. The apparatus also includes a first infeed for the first stream and a second infeed for the second stream, first and second infeeds being configured as a double-walled tube.

Abstract: A drive method is disclosed. An embodiment includes an operation of at least one drive propeller of the drive system below a first predefinable propeller rotational speed according to a first operating state by operating at least one drive motor, connected to the at least one drive propeller, of the drive system via a first alternating voltage. The method further includes operation of the at least one drive propeller above the first predefinable propeller rotational speed according to a second operating state by operating the at least one drive motor via a second alternating voltage. In a transition from the first operating state into the second operating state or vice versa, the first internal combustion engine is operated at such a rotational speed that the at least one drive propeller is driven at the first propeller rotational speed, and the first alternating voltage is synchronized with the second alternating voltage.

Abstract: Device for processing and measuring properties of a moving rod of material of the tobacco processing industry includes a microwave resonator structured and arranged so that the rod of material is conveyable through the microwave resonator. Includes microwave generator with output frequency f0, and frequency stabilized oscillator to generate intermediate frequency fIM that is less than f0. Single sideband modulator supplies microwave resonator with a sideband signal having a sideband frequency shifted with respect to output frequency f0 by intermediate frequency fIM, and at least one analysis arrangement includes single sideband demodulator, low-pass filter, and analog to digital converter arranged in series. Single sideband demodulator receives a measurement signal of the sideband frequency transmitted or reflected from the microwave resonator, and receives output frequency f0.

Abstract: A gondola drive for a floating device has an underwater housing circulated around by water. The gondola drive contains a drive module which has a drive module housing and a shaft disposed therein, a transmission module with a transmission module housing and a transmission disposed therein and a propeller. The drive module and the transmission module are each configured as separate components connected to one another such that the drive module housing and the transmission module housing form at least a part of the underwater housing and that the shaft is coupled to the transmission for driving the propeller.

Abstract: The present invention relates to a method for producing superconducting coils (1) having the steps of providing a substrate (2) and applying a superconducting material in the form of at least one coil onto the substrate. The application of the superconducting material is performed by at least one coating method directly on the substrate. Winding coated flat wires can be dispensed with. Furthermore, the present invention comprises a superconducting apparatus comprising a superconducting coil (1) produced in accordance with the method.

Abstract: A rotary position transducer assembly for a rotary connection on a work machine, between a first rotary element and a second rotary element, includes a rotary position transducer and a roll-off element coupled to the rotary position transducer, configured to roll off on the circumferential area on the first rotary element. The rotary position transducer detects a rotational movement about a first rotational axis of the roll-off element. The rotary position transducer assembly further includes a bearing securing the roll-off element to the second rotary element such that the roll-off element can be translationally adjusted to vary a distance between the roll-off element and the first rotary element.

Abstract: A turbo-machine includes at least two rotors which are mounted so as to be rotatable in opposite directions relative to one another about a rotational axis and on which are arranged blades or vanes, having a rotatably mounted machine shaft and having a drive mechanism which connects the machine shaft to the at least two rotors and which converts a rotational movement of the machine shaft into rotational movements of the rotors in opposite directions relative to one another or vice versa. In at least one embodiment, the turbo-machine is designed to utilize the hydrodynamic advantages of counter-rotating rotors yet at the same time have comparatively low mechanical complexity and component density and therefore increased reliability.

Abstract: In one aspect, a submarine with a boat hull and a propulsion drive for the submarine the propulsion drive is arranged outside the boat hull and comprises a housing and a first electric motor, with the housing embodying a channel for a flow of water through the channel in a main direction of flow from an inlet to an outlet of the channel, and with the first electric motor featuring a rotor which is arranged in the channel and is supported rotatably around an axis of rotation in the housing, with the rotor being embodied in the shape of a ring with a ring inner side and a ring outer side, and with blades for propelling the submarine being arranged on the ring inner side of the rotor.

Abstract: In the case of a variable-pitch propeller or repeller according to the invention, the pitch-adjusting device is arranged in the hub and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device comprises an electrical drive device, for moving the blades from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device, for locking the blades in the numerically limited number of different blade pitches.

Abstract: A method for operating a fluidic pipeline system including an active component generating a volume flow of a medium in the system is provided. A plurality of flow channels are connected in parallel with each other and supplied jointly with the volume flow of the medium by the active component. Each flow channel has an individual volume flow requirement of the medium, the requirement is variable over time for at least part of the flow channels. The volume flow in each flow channel includes a time-variable volume flow requirement individually throttled as a function of a control variable associated with the flow channel. The volume flow generated by the active component is additionally regulated as a whole so that no individual throttling of the local volume flow is required in at least one of the flow channels.

Abstract: A rotary position transducer assembly for a rotary connection on a work machine, between a first rotary element and a second rotary element, includes a rotary position transducer and a roll-off element coupled to the rotary position transducer, configured to roll off on the circumferential area on the first rotary element. The rotary position transducer detects a rotational movement about a first rotational axis of the roll-off element. The rotary position transducer assembly further includes a bearing securing the roll-off element to the second rotary element such that the roll-off element can be translationally adjusted to vary a distance between the roll-off element and the first rotary element.

Abstract: The invention relates to an assembly system for a mobile crane auxiliary lifting unit comprising auxiliary lifting unit assembly fastenings which are coupled to the auxiliary lifting unit and serve to fasten the auxiliary lifting unit to the crane, and comprising an assembly unit which can move the auxiliary lifting unit assembly fastenings into an assembly position. It also relates to an assembly installation for a mobile crane auxiliary lifting unit, comprising such an assembly system and comprising a sub-structure. A footing support for a mobile crane auxiliary lifting unit and a method for assembling a mobile crane auxiliary lifting unit are also disclosed.

Abstract: Device and method for processing and measuring properties of a moving rod of tobacco processing industry. Device includes a microwave measurement device in which endless rod is conveyable through microwave resonator from input side to output side. Microwave generator is included to generate a measurement signal having output frequency f0 and to supply measurement signal to input side of microwave resonator. At least one analysis arrangement includes a mixer, a low-pass filter, and an analog-to-digital converter in series, and local oscillator to generate a signal with local frequency fLO. Mixer is connected to port of microwave resonator and to output of local oscillator to generate difference signal of frequency fIM, which is less than f0 and corresponds to a difference of frequencies f0 and fLO. Low-pass filter is structured to pass output signal of mixer with intermediate frequency fIM, and filter higher frequency signal portions.

Abstract: An adjustable bearing foot assembly for installation in a base plate, for example a base plate of a crane sub-assembly, including a threaded nut comprising an inner thread; a bearing foot having an outer thread; and a securing element with which the bearing foot can be fixed, rotationally secure, in the threaded nut.

Abstract: Device for processing and measuring properties of a moving rod of material of the tobacco processing industry includes a microwave resonator structured and arranged so that the rod of material is conveyable through the microwave resonator. Includes microwave generator with output frequency f0, and frequency stabilized oscillator to generate intermediate frequency fIM that is less than f0. Single sideband modulator supplies microwave resonator with a sideband signal having a sideband frequency shifted with respect to output frequency f0 by intermediate frequency fIM, and at least one analysis arrangement includes single sideband demodulator, low-pass filter, and analog to digital converter arranged in series. Single sideband demodulator receives a measurement signal of the sideband frequency transmitted or reflected from the microwave resonator, and receives output frequency f0.