Appeal No. 96-2168
Application No. 08/257,478
supply is converted into an AC voltage, which is applied to
rotate rotors of the motors; chopping signal generating means
for generating chopping signals each having a predetermined
period for combining with respective drive signals for
selectively driving means of the respective drive means, the
chopping signals having a higher frequency than that of the
drive signals; wherein respective chopping signals and drive
signals are output by the microcomputer to the respective
drive means to convert the DC voltage to an AC voltage and to
effect voltage chopping, and the chopped AC voltage is applied
to respective motors to control the rotation frequency of
rotors of the motors.
The Examiner relies on the following references:
Karlin et al. (Karlin) 3,600,655 Aug. 17, 1971
Nam 5,210,684 May 11, 1993
(filed Dec. 18, 1991)
Yamaguchi et al. (Yamaguchi) 5,373,436 Dec. 13,
1994
(filed June 30, 1992)
Claims 1 through 3, 6, 13, 16 and 17 stand rejected
under 35 U.S.C. § 103 as being unpatentable over Karlin and
Yamaguchi. Claims 4, 5 and 7 through 12 stand rejected under
35 U.S.C. § 103 as being unpatentable over Karlin and
Yamaguchi in view of Nam. Claims 14 and 15 stand rejected
under 35 U.S.C. § 102 and being anticipated by Karlin.
Rather than reiterate the arguments of Appellants
and the Examiner, reference is made to the brief and answer
for the respective details thereof.
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