Couplings, in particular clutches, safety clutches and couplings, slip clutches, slip hubs,, flexible couplings, electromagnetic clutches, electromagnetic brakes, torque limiter, torsionally rigid couplings, electromagnetic safety brakes, rotation speed monitors, electromagnetic clutch/brake-units, drives, gear boxes, motors, drive units composed thereof; mechanical overload safety devices, parts of afore-mentioned goods, all above goods for machine constructions, as far as included in class 7.;