7 Couplings for machines, namely, slip clutches for machines, torque limiting clutches for machines, elastic and torsionally rigid shaft couplings for machines, pneumatic clutches for machines, mechanical clutches for machines; electric brakes for machines, hydraulic brakes for machines, pneumatic brakes for machines, electric actuators for couplings, brakes and drives, pneumatic overload clutches for machines, mechanical overload clutches for machines, all for securing linear and rotational movements; electromagnetic safety brakes for machines, electromagnetic clutch-brake units consisting primarily of brakes for machines, drives for machines, transmissions for machines, electric motors for machines, drive units for machines; drive units consisting primarily of direct-current (DC) drives for machines; all of the aforesaid goods and parts therefor being for machine construction