G - Physics – 08 – B
Patent
G - Physics
08
B
340/125
G08B 13/00 (2006.01)
Patent
CA 1294687
ABSTRACT Intruder Alarm System An intruder alarm system of the type used to detect mechanical vibrations in a security fence or the like. vibrations are assessed for alarm potential by detecting peak amplitudes against a dynamic vibration reference. A sufficient ratio between the two indicates an intrusion.
564348
Baxendale Roy
Fetherstonhaugh & Co.
LandOfFree
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