Patent ID: 8614873

Claim:
An article of manufacture comprising: two or more channels, each channel having electrical conductivity that, in use, varies over time among a respective set of values that includes a substantially non-conductive value and at least one conductive value; the channels including at least one coupling group of channels, each coupling group being configured such that, in use, inductive coupling occurs between electrical currents in the coupling group of channels; the channels further including first and second sets of the channels; the first set including one or more of the channels; the second set including one or more of the channels and including at least one channel that is not in the first set and that is in a coupling group with at least one channel in the first set; the channels in the first and second sets being configured so that, in response to electrical currents each in a respective one of the first set of the channels, a spatiotemporal magnetic flux pattern occurs that induces, in each of the second set of the channels, a respective electrical current variation that depends on the respective electrical currents in the first set of the channels and that increases magnetic flux density in at least part of the spatiotemporal magnetic flux pattern.