Security device and transponder
First Claim
1. A security device for attachment to a container having external walls such that at least a signal receiving and/or transmitting portion thereof comprising an RF transponder is located externally of, or adjacent to, one of said external walls, the security device being arranged to trigger an alarm signal if the container is moved within the range of an alarm unit with the security device attached thereto, the security device having a releasable locking mechanism to secure it to the container such that release of the locking mechanism requires the use of authorized release means, and wherein the container is adapted to hold a substantially planar article, the article including a metal layer, and wherein the security device is located in a position substantially co-planar with said metal layer.
3 Assignments
0 Petitions
Accused Products
Abstract
A security device for attachment to a container having external walls such that a transponder thereon is located externally of or adjacent to one of said external walls so as to avoid being shielded by a metal layer within the container (e.g. the metal layer within a disk such as a CD or DVD). The security device is arranged to trigger an alarm signal if the container is moved within the range of an alarm unit with the security device attached thereto, and has a releasable locking mechanism to secure it to the container such that release of the locking mechanism requires the use of authorized release means. In one embodiments the transponder is located in the vicinity of a window in a metal layer, e.g. at the centre of the disk.
34 Citations
19 Claims
- 1. A security device for attachment to a container having external walls such that at least a signal receiving and/or transmitting portion thereof comprising an RF transponder is located externally of, or adjacent to, one of said external walls, the security device being arranged to trigger an alarm signal if the container is moved within the range of an alarm unit with the security device attached thereto, the security device having a releasable locking mechanism to secure it to the container such that release of the locking mechanism requires the use of authorized release means, and wherein the container is adapted to hold a substantially planar article, the article including a metal layer, and wherein the security device is located in a position substantially co-planar with said metal layer.
- 16. A security device for attachment to apparatus adapted to hold one or more articles which includes a layer which is non-transparent to electromagnetic radiation, the security device having a portion for receiving and/or transmitting electromagnetic radiation so as to trigger an alarm signal if the apparatus is moved within the range of an alarm unit with the security device attached thereto, said portion being located on the device such that it lies in the vicinity of a window in said layer or a gap between two such layers so as to be able to receive and/or transmit electromagnetic radiation through said window or gap when the device is attached to said apparatus.
Specification