G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 13/22 (2006.01) E05B 73/00 (2006.01) G08B 13/24 (2006.01) E05B 39/00 (2006.01)
Patent
CA 2108219
A pin-and-clutch theft-deterrent device that enables instantaneous detection of separation-force tampering with the theft-deterrent device. The device includes a pin in one component and a clutch assembly in a second component for attaching the device to an article to be protected by grasping the pin with the clutch to provide a predetermined retaining force for resisting separation of the components by prying or pulling the components apart; a force-sensitive electrical switch having contact elements disposed for detecting application to the two components of at least a predetermined threshold separa- tion force applied in opposition to the predetermined retaining force; and a transponder coupled to the switch assembly for responding to an irradiated in- terrogation signal by radiating an alarm signal when the switch assembly detects application to the two components of at least the predetermined threshold separation force. One of the contact elements includes a rim and a dome that is deflected from one side of the rim to the other when a force is ap- plied to the dome in accordance with the direction in which the force is applied to the dome, and another one of the contact elements includes a ring that con- tacts the dome when the dome is deflected from one side of the rim to the other. The switch may be a momentary contact switch that does not maintain a changed state after the minimum predetermined threshold separation force is no longer applied. One of the two components includes a fragile vial containing a detrimental substance that is released from the vial and damages an article attached to the device when the vial is fractured as a result of at least a second lesser predetermined separation force being applied to the two components. A system for detecting attempted removal from a protected article of the theft- deterrence device is installed in proximity to a secluded area of a store, such as a changing room.
Di Carlo Edward J.
Herman Fred Wade
Hogan Dennis L.
Lynch John L.
Russell Hildan B.
Security Tag Systems Inc.
Smart & Biggar
LandOfFree
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