Appeal No. 2002-0816
Application No. 09/442,895 Page 9
magnets. However, we find that, as advanced by the examiner
(answer, page 9) that second magnet 7 is axially spaced from main
magnet 6, and that submagnet 7 is disposed radially inwardly from
the radial inner periphery of the armature windings 2 because the
outermost edges of submagnet 7 (figure 1) are closer to the
center of the rotor shaft that the innermost edges of armature
windings 2.
Turning to Knappe, we find the Knappe is directed to an
electromotive drive in which the magnet body is a magnet wheel
attached to the rotor shaft and producing a speed-proportional
signal in a stator-side Hall probe (col. 1, lines 7-12). Knappe
discloses that it was known to attach the magnet wheel directly
to the rotor shaft by force fit and/or adhesive fit (col. 1,
lines 16-22). Knappe recognizes (col. 1, lines 59-65) that “the
magnet body is relatively brittle. Therefore tangentially and
axially fixing the magnet body into position on the rotor shaft
with a force fit such that the magnet body will reliably remain
on the rotor shaft even after long and rough operation tends to
crack the brittle magnet body. Fixing the magnet body into
position on the rotor shaft with adhesive is not sufficiently
reliable.” Knappe further discloses (col. 2, lines 6-14) that
“[t]hus, there exists a need to provide a relatively simple
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