Device for transferring a signal between two end points which are movable relative to each other

A device for transferring a signal between two end points comprising:

• a substantially circular cassette, and a coiled conductor which is contained in the cassette and interconnects the two end points, wherein the two end points are arranged on the cassette for receiving further extending conductors attachable at the two end points, the length of said conductor being substantially greater than a distance between the two end points, and at least one of the two end points being movable relative to the other, the cassette comprising a stationary stator and a turnable rotor, the device further comprising:
• a screw and an outwardly protruding projection for reception of the screw, the screw being displaceable in axial direction of the cassette, the projection being located radially outward of a center of the rotor and adjacent to an interface with the stator and extending from the rotor;
• and
• a spring element disposed on the rotor, the spring element being displaceable by the screw upon a contacting of the spring element by the screw to be applied firmly against the stator in a mounting position of the cassette;
• and
• wherein in a working position of the cassette, the spring element is separated by a distance from the stator upon retraction of the screw.