Appeal No. 1996-3275
Application No. 08/038,469
connecting the battery to neutral is simple in a power supply
unit without a PFC circuit” and identifies the Tamoto
reference for such a teaching.
Further, the specification indicates that the prior art
was able to provide for an undisturbed neutral in systems
containing a PFC device but that those systems required three
converters. The instant invention provides for an improvement
wherein separate converters for the battery are eliminated
while preserving the advantages of power factor corrected UPS
devices maintaining the integrity of the neutral connection
from input to load.
The examiner rejects the instant claims over APA, which
shows a conventional UPS system containing a PFC circuit but
which contains a battery converter because the battery cannot
be connected directly to the PFC circuit, in view of Tamoto,
even though Tamoto has no PFC circuit. As appellants
explained in the specification, Tamoto merely shows a typical
system without a PFC circuit and that the “task of connecting
the battery to neutral is simple in a power supply unit
without a PFC circuit,” as in Tamoto. Now, without any
motivation for doing so, other than appellants’ disclosure,
4
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007