Device for producing an impulse sequence in dependence on the variation of a primarycurrent

Claim 1

APPARATUS FOR MEASURING A CURRENT OF VARYING MAGNITUDE FLOWING IN A GIVEN DIRECTION THROUGH A PRIMARY CONDUCTOR COMPRISING A PLURALITY OF BAR-SHAPED CORE ELEMENTS ARRANGED IN PARALLEL SPACED RELATION INTERMEDIATE TWO PARALLEL SPACED FERROMAGNETIC YOKE PARTS WHICH ENGAGE THE ENDS OF SAID BAR-SHAPED CORE ELEMENTS, EACH OF SAID CORE ELEMENTS BEING OF A HIGHLY PERMEABLE FERROMAGNETIC MATERIAL AND HAVING A SUBSTANTIALLY RECTANGULAR MAGNETIZATION CHARACTERISTIC, MEANS ARRANGING SAID PRIMARY CONDUCTOR IN MAGNETIC INDUCTIVE RELATION WITH EACH OF SAID CORE ELEMENTS, MEANS MAGNETICALLY BIASING SAID CORE ELEMENTS IN SEQUENCE TO PROGRESSIVELY DIFFERENT DEGREES OF MAGNETIZATION, AND A SECONDARY WINDING ARRANGED IN MAGNETIC INDUCTIVE RELATION WITH EACH OF SAID CORE ELEMENTS, SAID SECONDARY WINDING HAVING INDUCED THEREIN A SUCCESSION OF OUTPUT VOLTAGE PULSES CORRESPONDING RESPECTIVELY TO THE PROGRESSIVE CHANGES IN MAGNETIZATION PRODUCED IN SAID PROGRESSIVELY MAGNETICALLY BIASED CORE ELEMENTS BY THE CHANGE IN MAGNITUDE OF THE CURRENT FLOWING THROUGH SAID PRIMARY CONDUCTOR, THE CHANGE IN MAGNETIZATION OF ADJOINING CORE ELEMENTS PRODUCING OUTPUT VOLTAGE PULSES OF THE SAME POLARITY IN SAID SECONDARY WINDING.