Methods and apparatus for security device removal detection

Details Methods and apparatus for security device removal detection Methods and apparatus for security device removal detection

2007-12-13

2010-02-23

Nguyen, Tai T (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S547000, C340S545100, C340S541000, C340S551000, C335S205000, C335S207000, C335S209000, C335S215000, C335S228000

Reexamination Certificate

active

07667600

ABSTRACT:
A security device, according to various aspects of the present invention, detects removal of the device from a provided surface. The security device includes a body; at least one magnet coupled to the body; and a sensor coupled to the body proximate to at least one of the at least one magnet. The sensor does not move with respect to the at least one magnet. The at least one magnet magnetically couples the body to the surface. Each one magnet provides a magnetic flux. When the body couples to the surface, at least a portion of the magnetic flux conducts away from the sensor. When the body is not coupled to the surface, at least a portion of the magnetic flux from at least one magnet of the at least one magnet conducts through the sensor thereby indicating removal of the body from the surface.

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