G - Physics – 08 – B
Patent
G - Physics
08
B
340/125
G08B 13/22 (2006.01) G08B 13/14 (2006.01) G08B 25/01 (2006.01)
Patent
CA 1254629
ABSTRACT OF THE DISCLOSURE An equipment security system is provided herein which is capable of monitoring at least one security loop for detecting unauthorized removal of equipment interconnected within such security loop. The system comprises: predetermined resistance means secured in or to the equipment forming the security loop and being one arm of a resistance bridge. The predetermined resistance means has a resistance value sufficient to maintain the resistance bridge in a substantially balanced state. The resistance bridge has a DC voltage permanently applied across one of its two pairs of diagonal terminals and having a diode bridge connected across the other of its two pairs of diagonal terminals. Means are provided which are responsive through the diode bridge for indicating an unbalanced state of the resistance bridge to indicate interruption of the security bridge. This would indicate unauthorized removal of the equipment.
504696
Borden Ladner Gervais Llp
Faulkner Peter
LandOfFree
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