particular, Appellants point out that both Sember and Stephens
operate by varying the angle control.
We note that all of Appellants' claims recite a fixed
angle control. In particular, Appellants' claim 1 recites
"said controller ... generates said switching control signals
to enable at least said first and second switching means for
each of said phase winding at a fixed angle prior to alignment
of said rotor pole with said phase winding's associated stator
pole ... further generating said switching control signals to
disable at least said first and said second switching means at
a fixed angle after alignment of said rotor pole with said
phase winding's associated stator pole ...." Appellants'
claim 12 recites "enabling the
switching means ... at a fixed angle prior to alignment of a
rotor pole with the energized stator pole; disabling the
switching means . . . at a fixed angle prior to alignment of a
rotor pole with the energized stator pole; disabling the
switching means ... at a fixed angle after alignment of the
rotor pole with the energized stator pole ...." Appellants'
9
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