Electric motor edgewise wound helical core

Claim 1

A HELICALLY WOUND STATOR CORE MEMBER COMPRISING SUPERPOSED HELICAL TURNS SUBSTANTIALLY UNIFORM IN THICKNESS FORMED EDGEWISE INTO A HELIX FROM AN ELONGATED RELATIVELY THIN STRIP OF MAGNETIC SHEET MATERIAL; SAID STRIP INCLUDING A SOLID PORTION HAVING A PRESELECTED TRANSVERSE WIDTH AND A PLURALITY OF SPACED APART NOTCHES PROVIDED ALONG ONE EDGE THEREOF DEFINING EQUALLY SPACED APART, GENERALLY PARALLEL PROJECTIONS INTEGRALLY JOINED TO SAID SOLID PORTION; SAID PROJECTTIONS AND NOTCHES BEING IN AXIAL REGISTER IN SAID WOUND CORE MEMBER TO FORM RESPECTIVELY A NUMBER OF ANGULARLY AND EQUALLY SPACED APART TEETH SECTIONS AND SLOTS, WITH SAID SOLID PORTION DEFINING A FLUX CARRYING YOKE SECTION DISPOSED RADIALLY OUTWARDLY OF SAID TEETH SECTIONS, THE YOKE SECTION OF THE INDIVIDUAL TURNS RADIALLY OUTWARD FROM SAID SLOTS BEING AT LEAST 4% DIMENSIONALLY LESS IN RADIAL WIDTH IN THE DIRECTION OF THE CORE AXIS THAN THE PRESELECTED TRANSVERSE WIDTH OF THE CORRESPONDING STRIP SOLID PORTION, BASED UPON THE FORMED YOKE RADIAL WIDTH, AND THE DIMENSIONS OF THE INDIVIDUAL TEETH SECTIONS BEING GENERALLY THE SAME AS THEIR CORRESPONDING PROJECTIONS IN THE UNIFORMED STRIP WHEREBY SAID HELICALLY WOUND STATOR CORE INCLUDES BOTH TEETH AND YOKE SECTIONS OF GENERALLY UNIFORM THICKNESS AND HAS THE DESIRED ELECTRICAL AND PERFORMANCE CHARACTERISTICS.