Appeal No. 2000-1954
Application No. 08/593,459
Appellant’s Invention
The invention is described at pages 1-3 of the brief.
The Prior Art
Hauenstein discloses a blocking converter for use in
battery-operated electronic flash equipment for photography.
Figure 1 shows a switching transistor T controlled by a monoflop
11 (Figure 7) in a control circuit S with a defined on-time RC
circuit which insures that the same electric energy quantity is
always stored in a transformer Tr driven by the switching
transistor when conducting. The electrical energy in the
transformer is reversed when the switching transistor becomes
non-conducting (toff, Figures 2-5) to charge the capacitor CL
during a blocking phase of the switching transistor. The
capacitor CL is in turn discharged to produce the camera flash.
The operation of re-charging the capacitor is then repeated.
Grouping of Claims
At page 3 of the brief, appellants have stated that all
claims do not stand or fall together. The position is taken that
even if independent claims 1 and/or 23 are not considered to
distinguish from the prior art, separate grounds of patentability
exist for independent claims 12 and 24.
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