Patent ID: 6063267
Filing Date: 2000-05-16
Classification: C02F

Abstract:
An apparatus for treating flowing liquid with electromagnetic flux and to be powered by a source of alternating current electrical power wherein a set of half cycles of positive voltage alternate with a set of half cycles of negative voltage, said apparatus comprising:a pipe for conducting a flow of liquid,at least one electrical coil surrounding said pipe,means providing a given capacitance,a first switching circuit including a triode switch having first, second, and third terminals with said first and second terminals being switchable between open and closed conditions relative to one another in response to electrical signals applied to said third terminal, andconnecting means for connecting said coil, capacitance and first switching circuit to one another and to said power source such that during each half cycle of at least one of said two sets of half cycles, current due to said source power flows through said coil during an initial portion of the half cycle because of said first and second terminals of said switch being in a closed condition relative to one another and such that at a significant amount of time in advance of the completion of said half cycle, while a substantial amount of current is flowing through said triode switch, said first and second terminals of said switch are switched to their open condition,said connecting means further being such that when said first and second terminals of said switch are in their open condition relative to one another said coil and capacitance form part of a series resonant circuit so that immediately following said switching of said first and second terminals of said switch from their closed to their open condition, a ringing current appears in said coil.