Appeal No. 97-2881
Application No. 08/387,166
provided with a motion-sensitive alarm 40 that emits an
audible sound when the protective cover is disturbed.
The examiner notes (Answer, page 6) that “Kraft differs
from the claimed invention in the material used for the
shield, such as the non-armored shield, and the method of
activating the alarm, such as the relationship of the
different layers and the alarm.”
Kothe discloses a tamperproof barrier for wall structures3
of a safe 10 and a cable 21 (Figure 1). The barrier for the
3Kothe discloses that it is known to construct barrier
walls that cannot be penetrated without generating a warning
signal (column 1, lines 7 through 11). According to Kothe
(column 1, lines 11 through 17):
Certain of such prior-art barrier walls comprised
two conducting surfaces with a thin layer of
insulation between them. The conducting surfaces
were connected across the terminals of a battery and
any carelessly applied metal tool that pierced the
wall would short the circuit between the two
conducting surfaces and ring an electric alarm.
Such a short-circuit condition between two metal conducting
layers 72 and 74 separated by an insulating layer 76 in a
barrier wall of a safe is described in the applied reference
to Zuver (Figure 3; and column 2, line 68 through column 3,
line 2).
Neither Kothe nor Zuver discloses supporting the conductive
layers on a non-conductive substrate in the form of an
enclosure.
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