Magnetic storage devices

Claim 1

A MAGNETIC DEVICE COMPRISING A PLATE OF SUBSTANTIALLY RECTANGULAR HYSTERESIS LOOP MATERIAL, SAID PLATE HAVING FIRST AND SECOND GROUPS OF CLUSTERS OF APERTURES THEREIN, THE RESPECTIVE APERTURES OF A CLUSTER HAVING A RELATIVELY SMALL CENTER-TO-CENTER SPACING SO THAT THE CLUSTER EFFECTIVELY PROVIDES A SINGLE MAGNETIC ELEMENT DEFINED BY THE PORTION OF MATERIAL AROUND ALL OF SAID APERTURES, SAID ELEMENT HAVING TWO REMANENT STATES, THE FIRST OF SAID STATES CORRESPONDING TO FLUX ESTABLISHED BY APPLICATION OF CURRENTS OF ONE POLARITY THROUGH ONE OR MORE OF THE APERTURES OF THE CLUSTER AND THE OTHER REMANENT STATE CORRESPONDING TO THAT ESTABLISHED BY CURRENT FLOW OF OPPOSITE POLARITY THROUGH ONE OR MORE OF THE APERTURES, EACH OF SAID CURRENTS BEING ABOVE A SELECTED MINIMUM VALUE, ANY ONE SAID CLUSTER BEING COMMON TO ONER SAID FIRST AND ONE SAID SECOND GROUP, A FIRST SET OF SELECTING WINDINGS EACH LINKED THROUGH ONE APERTURE OF EACH CLUSTER OF A DIFFERENT SAID FIRST GROUP, A SECOND SET OF SELECTING WINDINGS EACH LINKED THROUGH ANOTHER APERTURE OF A DIFFERENT SAID SECOND GROUP, AND A FURTHER WINDING LINKED THROUGH A THIRD APERTURE ALL OF SAID CLUSTERS.