Abstract: A system for carrying out the controlled displacement of objects comprises a propulsion device constituted by a magnetizing assembly and a magnetized assembly which are capable of relative motion and one of which is connected to an object container while the other is connected to an object-withdrawal device. Power is supplied in the form of a sequence of unidirectional pulses fed to the inductance windings of the magnetizing assembly, the sequence being controlled by a program comprising a series of whole numbers of pulses. Each whole number corresponds to one stationary position of the system so as to place the object-withdrawal device opposite to the stored object.