Appeal No. 1997-0397
Application 07/863,900
motor art at the time the invention was made would have known that
increasing the current to the stationary armature (coils) of a
brushless DC motor would increase the torque and, hence, the power
output at a given speed. See Fink et al., Standard Handbook for
Electrical Engineers 20-8 (13th ed., McGraw-Hill, Inc., 1993) (copy
attached) ("Speed of a dc motor is controlled either by varying the
voltage across the armature, the field winding, or both. . . .
Torque produced by a brushless dc motor is directly proportional to
armature current.").2
Based on the evidence of record, we find that the brushless DC
motors of Sato and Gerfast inherently have "said motor hardware being
operable within a range of power outputs with said range being
determinable by the capacitance of the capacitor when such
capacitance is within a predetermined range."
The second issue is whether the "whereby" clause, "whereby the
power output of a given hardware assembly may be preselectively
determined, at the time of manufacture and interconnection with the
control circuit by the capacitance value of said capacitor in the
2 Although the date of this standard reference work is after
the filing date of the application, it is assumed that these
teachings would have been known to those skilled in the art more than
one year before the filing date.
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