Selectable pulse width modulator using biased saturable transformer

Claim 1

A SELECTABLE PULSE WIDTH MODULATOR COMPRISING, FIRST AND SECOND ENERGY STORAGE MEANS EACH HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL, A SATURABLE OUTPUT TRANSFORMER, THE OUTPUT TERMINALS OF SAID STORAGE MEANS BEING COUPLED TO A COMMON LOAD THROUGH SAID SATURABLE OUTPUT TRANSFORMER, EACH SAID STORAGE MEANS COMPRISING A LOW LEVEL ENERGY STORAGE ELEMENT AND HIGH LEVEL ENERGY STORAGE ELEMENT CONNECTED IN CASCADE THROUGH A RESPECTIVE INTERSTAGE SATURABLE TRANSFORMER, EACH TRANSFORMER HAVING A BIAS WINDING FOR DRIVING THE RESPECTIVE TRANSFORMER IN SATURATION, A SOURCE OF CHARGING CURRENT, FIRST AND SECOND SYNCHRONOUSLY OPERABLE SWITCHING MEANS, SAID FIRST SWITCHING MEANS SELECTIVELY COUPLING THE INPUT TERMINAL OF ONE OF SAID STORAGE MEANS TO A CIRCUIT POINT, SAID SECOND SWITCHING MEANS CONNECTING THE BIAS WINDING OF THE SELECTED INTERSTAGE TARANSFORMER AND THE BIAS WINDING OF SAID OUTPUT TRANSFORMER AND IN OPPOSITE SENSE WITH THE BIAS WINDING OF THE UNSELECTED TRANSFORMER IN A SERIES CIRCUIT BETWEEN SAID SOURCE AND SAID CIRCUIT POINT, AND MEANS CONNECTED TO THE SELECTED STORAGE MEANS FOR DISCHARGING THE LOW LEVEL ENERGY STORAGE ELEMENT INTO THE HIGH LEVEL ENERGY STORAGE ELEMENT THROUGH THE RESPECTIVE SATURABLE TRANSFORMER AND FOR DISCHARGING THE HIGH LEVEL ENERGY STORAGE ELEMENT INTO SAID LOAD THROUGH SAID STATURABLE OUTPUT TRANSFORMER.