Appeal No. 98-0130 Page 10
Application No. 08/631,793
While we agree with the examiner that Gillett does teach
mechanically separable primary and secondary side components
(figures 2 - 4) for a power converter, we are in agreement
with appellant (Brief, page 14) that there is no suggestion in
the prior art to make the primary and secondary circuits of
Snow separable as advanced by the examiner.
We find that in Gillett, the pulse width modulation
control circuit (40) which controls switch (38) is part of the
primary drive circuits (10) as shown in figures (1) and (2).
Gillett discloses (col. 3, lines 22-24) primary drive circuits
(10), primary windings (12, 14, 16, and 18), and power
transformer cores (20, 22, 24, and 26). The primary drive
circuits (10) include voltage supply (36), a transistor switch
(38), and oscillator driven pulse width modulation control
(40) which is responsive to a feedback signal on line (42) to
vary the “On” time of each cycle of operation of switch (38)
so as to maintain the output voltage sensed on line (42) at a
desired level with respect to a reference voltage in control
circuit (40) (See col. 3, lines 25-34). In addition, Gillett
discloses that secondary windings (28, 30 and 32), (also
referred to by Gillett as power output windings), drive output
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