Permanently destructible resonant circuit with...

Details Permanently destructible resonant circuit with... Permanently destructible resonant circuit with...

G - Physics

08

B

G08B 13/24 (2006.01)

Patent

CA 2675860

A resonant circuit for use with a radio-wave detection system for the prevention of shoplifting or the like which has a coil and capacitor circuit whereby the circuit is permanently destroyed when the tag is exposed to a radio signal that causes a voltage across the capacitor that exceeds the breakdown voltage of the capacitor. The capacitor comprises a dielectric that does not exhibit self-healing. Such dielectrics include ceramics, metal oxides and minerals.

La présente invention concerne un circuit résonant destiné à être utilisé avec un système de détection radio-électrique utilisé pour empêcher le vol à l'étalage ou autre et comprenant une circuit de bobine et de condensateur tel que le circuit est irrémédiablement détruit lorsque l'étiquette est exposée à un signal radio qui provoque une tension au niveau du condensateur qui dépasse la tension de claquage du condensateur. Le condensateur comprend un diélectrique qui ne se répare pas tout seul. Un tel diélectrique peut être un matériau céramique, un oxyde métallique et un minéral.

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