Appeal No. 1997-0907
Application 08/291,642
combination, such as to provide a stable power off position
where the poles of the magnet 16 are approximately aligned
with the center of the gap 75 and 76 as explained in the last
paragraph at the bottom of
column 3.
From an artisan's perspective, Castor describes what
amounts to a stepper motor, such as that explicitly disclosed
in Wang. The showing in the various figures of Castor, in
addition to the use of the language describing the structure
having an armature comprising a core 12 and a coil 13 with a
cylindrically shaped movable magnet 16 capable bi-directional
rotation placed within the core 12 of the armature, obviously
would have suggested a stepper motor construction comparable
to that explicitly disclosed in Wang.
Wang's stator winding 18 in Figure 1 comprises a coil
wire providing the basis for an electromagnet stator housing
encompassing the coil 18 and comprising field cap halves 10A
and 10B with the addition of a rotor 24. As correctly
identified by the examiner with reference to Figure 2 at the
bottom of column 3, the annular bias magnet 30 is clearly
coaxially located with the stator housing 10A-10B coil winding
5
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