Data storage devices

Claim 1

A MAGNETIC SWITCH CORE ASSEMBLY COMPRISING AN ANNULAR MAGNETIC CORE OF A FERRITE MATERIAL WHICH HAS A SUBSTANTIALLY RECTANGULAR HYSTERESIS LOOP AT ROOM TEMPERATURE AND WHICH SUFFERS A SUBSTANTIAL DETERIORATION IN MAGNETIC PROPERTIES AS THE TEMPERATURE INCREADED; A PLURALITY OF SINGLE LAYER WINDINGS, EACH OF WHICH IS WOUND ON A DIFFERENT SEGMENT OF THE CORE, AND TO SOME OF WHICH HIGH FREQUENCY IMPULSES ARE APPLIED TO EFFECT SWITCHING OF THE CORE; A RELATIVELY LARGE VOLUME OF MATERIAL HAVING A HIGH THERMAL CAPACITY AND THERMAL CONDUCTIVITY RRELATIVE TO THE MATERIAL OF SAID CORE; AND A RELATIVELY SMALL VOLUME OF MATERIAL IN INTIMATE CONTACT WITH AT LEAST A MAJOR PART OF THE PERIPHRY OF SAID CORE AND WITH EACH OF SAID WINDINGS AND BEING SO FORMED THAT IT SUPPORTS THE CORE IN A FIXED PHYSICAL RELATIONSHIP WITH SAID LARGE VOLUME OF MATERIAL AND PROVIDES A PATH OF GOOD THERMAL CONDUCTIVITY FOR THE TRANSFER OF HEAT FROM THE CORE AND THE WINDINGS TO SAID LARGE VOLUME OF MATERIAL.