Balanced modulator or demodulator

Claim 1

APPARATUS COMPRISING A FIRST E-SHAPED MAGNETIC CORE HAVING A CENTER LEG PARALLEL TO FIRST AND SECOND OUTER LEGS, THEREBY PROVIDING FIRST AND SECOND PARALLEL GAPS, FIRST AND SECOND COILS WOUND AROUND SAID FIRST AND SECOND OUTER LEGS, RESPECTIVELY, SAID FIRST AND SECOND COILS BEING CONNECTED IN SERIES AND OPPOSITELY WOUND, A THIRD COIL WOUND AROUND SAID CENTER LEG, FIRST AND SECOND MAGNETIC FLUX SHIELDS EACH COMPRISING A METAL DISC FIXEDLY MOUNTED PARALLEL TO EACH OTHER ON A SHAFT, SAID DISCS BEING ECCENTRICALLY MOUNTED WITH RESPECT TO THEIR CENTER OF MASS, THE CENTER OF MASS OF ONE BEING DISPOSED ON THE OPPOSITE SIDE OF SAID SHAFT RELATIVE TO THE CENTER OF MASS OF THE OTHER, SAID FIRST AND SECOND DISCS BEING DISPOSED IN PLANES PASSING THROUGH SAID FIRST AND SECOND PARALLEL GAPS, RESPECTIVELY, AND MEANS FOR ROTATING SAID SHAFT ABOUT ITS LONGITUDINAL AXIS, WHEREBY SAID DISCS MOVE IN AND OUT OF THEIR RESPECTIVE GAPS, ONE MOVING IN WHILE THE OTHER IS MOVING OUT, IN ORDER TO CYCLICALLY VARY THE FLUX LINKAGES BETWEEN SAID THIRD COIL AND SAID ASSOCIATED FIRST AND SECOND COILS IN ACCORDANCE WITH FUNCTIONS OF TIME DETERMINED BY THE SHAPE OF SAID DISCS.