Inline motor iron and windings

In a motor apparatus of the type described in which two stator elements are adapted to be periodically connected to an electrical voltage source for rotatably coercing across an annular air gap a coaxially mounted cylindrical rotor whose lengthwise splined poles extend through both elements, are equally spaced peripherally and are permanently charged with alternate north and south magnetic fields, each said element comprising a bobbin-styled winding whose coil axis is inline with the motor's central axis and flux-carrying stator iron pieces which surround said winding on its end faces and on its side away from said rotor, said stator iron pieces incorporating a full complement of pole lands and spaces of equal arcs extending radially at their two end-face sections toward said rotor whose poles number substantially less than stator lands in order that energizing the winding of either element emanates a toroidally-shaped flux circuit to selectively gate fluxes at the two rings of stator lands that surround said element toward circumferentially overlapping rotor poles, the coaction of field strengths of said rotor poles with those instant to said rings of stator lands whose polarities depend on the direction of electric current through the winding between them in producing a torque that aggregates uniformly at every rotor pole around the air gap and the resulting step movement of said rotor amounting to an arc equal to one-quarter that subtended by a stator land and space together adding to an arc of one full land and space after a cycle of four consecutive steps in the same direction, of which the first is marked by the passage of current in one direction through the winding of one element whose surrounding two rings of stator lands are oriented circularly one-half land pitch apart, the second by the passage of current in the same direction through the winding of the other element whose surrounding rings have their lands staggered one-half land pitch in the same manner as the one element but also oriented one-quarter land pitch in the direction of rotor movement from the corresponding rings in the one element, the third by the passage of current in the opposite direction through the winding of the one element and the fourth by the passage of current in the opposite direction through the winding of the other element and so on to impress sustained rotation through further step movement cycles and to permit rotation in the opposite direction by directing the same currents through the windings in reverse order.