Appeal No. 1999-0636 Page 12
Application No. 08/828,375
reed switch has been out of proximity with the magnet for a
predetermined period of time. The alarm circuit is designed
to prevent false alarms caused by wind disturbances of the
blind while warning of a more sustained movement of the blind
caused by an intruder. The appellant's argument is, in
effect, that such a delay to prevent false alarms would have
been unnecessary or undesirable on the relatively rigid gate
of Martinek.
We have carefully considered this argument, but we do not
find it persuasive. La Mell clearly teaches the desirability
of providing an alarm on a movable barrier positioned in an
opening to detect movement of the barrier by intruders seeking
access to the opening. While it may be true that a delay
circuit in the alarm system would not have been considered by
one of ordinary skill in the art to be desirable for all gates
in all situations, we find the teaching of La Mell sufficient
to have suggested broadly the provision on the Martinek gate
of an alarm, even if not the particular alarm system disclosed
by La Mell, activated
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