Abstract: A coil spring cartridge includes a cylindrical stator housing part and a rotor housing part, three flexible flat cables each having at least one electrical conductor, and a flexible flat ribbon lacking an electrical conductor. The flat cables and the flat ribbon with their respective ends are fastened on the one hand to the stator housing part and on the other hand to the rotor housing part, and are wound so tightly on the respective housing parts that a U-shaped reversal section that reverses the winding direction is formed between their ends. The flexible flat cables and the flat ribbon, when contacting each of the lateral faces of the winding gap, cooperate in their sequence of superposition and in their respective internal configuration to form a desired waveguide geometry.

Abstract: A coil spring cassette includes a stator housing part and a rotor housing part that is rotatable relative to the stator housing part about a longitudinal axis. The stator housing part and the rotor housing part together form therebetween a first chamber and a second chamber at respective positions along the longitudinal axis. A first flat cable with a reversal of winding direction is arranged in the first chamber. A second flat cable with a uniform winding direction is arranged in the second chamber.

Abstract: A coil spring cassette includes a stator housing part and a rotor housing part that is rotatable relative to the stator housing part about a longitudinal axis. The stator housing part and the rotor housing part together form therebetween a first chamber and a second chamber at respective positions along the longitudinal axis. A first flat cable with a reversal of winding direction is arranged in the first chamber. A second flat cable with a uniform winding direction is arranged in the second chamber.