Abstract: Electrodynamic separation of non-ferromagnetic, free-flowing materials, in which at least one component of the material to be processed is electrically conductive, whereby such material is caused to free-fall into a region of space permeated by time and space varying magnetic fields which induce eddy currents in the electrically conductive particles which produce forces on such particles that result in substantially different free-fall trajectory than that of nonconductive particles. Conductive particles are separated on the basis of mass, electrical conductivity and magnetic susceptibility. The time and space varying magnetic fields are generated by a plurality of permanent magnets or electromagnets attached to a rotor assembly such that the polarity of adjacent magnets is caused to reverse so that rotation of the rotor assembly generates magnetic fields which may vary in time and space to the maximum extent.

Abstract: In a data transmission system, apparatus for converting a subrate binary data stream into a binary signal at the line transmission rate comprises means for periodically accepting a date byte from the subrate data stream and; means for expanding the data byte by one additional bit by adding a control bit in the first bit position of the accepting means. The apparatus additionally comprises means for recirculating the expanded data byte through the accepting means a predetermined number of times and means for serially reading out bits of the expanded data byte at the line transmission rate.