Electrical switching apparatus for high frequency signals

Claim 1

IN COMBINATION WITH AN ELECTRICAL CROSS-BAR SWITCH OF THE TYPE HAVING PLURAL ELONGATED HOLD CONDUCTORS ARRANGED IN PARALLEL ARRAY IN A COMMON PLANE, PLURAL SELECT CONDUCTORS EXTENDING NORMALLY TO THE COMMON PLANE, DIFFERENT ONES OF THE SELECT CONDUCTORS BEING RELATIVELY CLOSELY ADJACENT TO DIFFERENT RESPECTIVE ONES OF THE HOLD CONDUCTORS, AND CONTACT MEANS FOR SELECTIVELY AND ALTERNATIVELY MAKING AND BREAKING ELECTRICAL CONNECTIONS BETWEEN THE HOLD CONDUCTORS AND THE SELECT CONDUCTORS, THE IMPROVEMENT COMPRISING MEANS FOR APPLYING A FIRST ALTERNATING CURRENT SIGNAL BETWEEN A POINT OF REFERENCE POTENTIAL AND A FIRST ONE OF THE HOLD CONDUCTORS, MEANS FOR PRODUCING A SECOND ELECTRICAL SIGNAL OF THE SAME INSTANTANEOUS MAGNITUDE AS THE FIRST SIGNAL BUT OF OPPOSITE INSTANTANEOUS POLARITY THEREFROM, AND MEANS FOR APPLYING SAID SECOND SIGNAL BETWEEN THE POINT OF REFERENCE POTENTIAL AND ONE OF THE HOLD CONDUCTORS NEXT ADJACENT TO SAID FIRST ONE, WHEREBY SIGNAL TRANSMISSION BY STRAY COUPLING BETWEEN THE HOLD CONDUCTORS AND THE SELECT CONDUCTORS WILL BE COMPENSATED BY THE OPPOSING EFFECT OF SAID FIRST AND SECOND SIGNALS.