Abstract: Various shaped abrasive particles are disclosed. Each shaped abrasive particle includes a body having at least one major surface and a side surface extending from the major surface.

Abstract: A two phase stepper motor having a rotor shaft with a multi-pole rotor and a stator assembly in magnetic flux relationship with the rotor. The stator assembly includes a plurality of sequentially stacked laminations which are each provided with eight stator poles with each immediately successive stator pole having an opposite phase and each being at a 45.degree. index spacing from the immediately adjacent lamination. The stepper motor also contains a multi-phase winding for energizing the stator poles to operate the rotor in successive discrete steps. The stepper motor housing includes first and second end pieces having a pair of triangular cross-section members forming notches therebetween on a first pair of oppositely disposed corners which receive and retain an abutment post on a second pair of oppositely disposed corners from the opposite end piece thereby interlocking the first and second end pieces relative to one another.

Abstract: An electric motor has a stator construction which includes identical facing cup shaped members having a circumferential surface which includes a plurality of tabs and recesses. The tabs of one cup shaped member are dimensioned and configured for an engagement with the recesses of the other cup shaped member to positively position axially and radially each cup shaped member relative to the other. In one form the tabs may have a negative taper such that the base extremity of the tab has a smaller width than the other extremity of the tab. The negative taper produces a more pronounced interference fit and causes the cups to snap together without the necessity for cementing, welding, or other metal joining process. Each cup in one form is also provided at a plurality of angularly spaced recesses for receiving two identical generally planar plates having cooperating tabs and upstanding pole pieces. The recesses in one form extend along the circumferential surfaces to the tabs.