Patent ID: 7296342
Filing Date: 2007-11-20
Classification: H02K,Y10T

Abstract:
1. A fixture for magnetizing axially alternating N and S poles defined circumferentially in a portion of an outer periphery of an axially extending, cylindrical, smooth shaft, said fixture comprising: (a) a hollow cylindrical one and only one mandrel formed from a non-magnetic, non-electrically-conducting material; (b) one and only one conductive wire disposed in parallel, circumferential channels defined in an outer surface of said one and only one mandrel; (c) a potting compound surrounding said one and only one mandrel to secure said one and only one conductive wire in place; (d) a central bore defined axially and centrally through said one and only one mandrel and exposing or nearly exposing said one and only one conductive wire; and (e) said central bore being sized to accept axially inserted therein said portion of said axially extending, cylindrical, smooth shaft to impress thereon alternating axial permanent magnet poles.