Appeal No. 1998-0506
Application 08/314,994
and does not disclose the relationship of the slots to the
magnet. Figure 3 of De Filippis does not show the slots
aligned with the ends of the magnets. Furthermore, because
the magnet can have a range of angular extent, one of
ordinary skill in the art would not have been taught to use
the specific claimed spacing and would not have been put in
possession of the invention.
De Filippis also describes reducing the reluctance
torque by selecting the plates of the stator of a "size such
that the material constituting the plates operates in
conditions of maximum magnetic permeability ()" (col. 4,
lines 24-26). Appellant argues that this is not equivalent
to using a modulation function to reduce cogging torque. We
agree. The selection of material has nothing to do with
alignment of the slots relative to the magnets.
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