Abstract: An anti theft tack device incorporating a detectable element which can be attached to the body component of an existing electronic article surveillance security tag to replace the tack-like connecting component of the security tag. The anti theft tack device includes a connecting element, a base element, a housing that encloses elements whose proximity is detectable by the in-store electronic equipment, a means to releaseably secure the device to the article to be protected, and a means to releaseably engage the device to the body component of an existing surveillance tag. Engagement of the present device to a surveillance tag provides the ability to upgrade an existing surveillance tag incorporating a first detection technology to a second type of detection technology.

Abstract: An anti theft tag designed to permanently render an article useless if unauthorized removal of the tag is attempted. The anti theft tag includes ampules containing a permanent staining substance. The permanent staining substance is of the type that changes the composition of the article, such as bleach, rather than a dye. The ampules are supported in a base component with holes that allow the staining substance to escape if the ampules are fractured. A cover component with a break away element covers the base component. Permanently attached to the break away element is an elongated pin type connecting unit that is used to attach the tag to the article being protected, and locked into place by a locking mechanism. When an unauthorized removal of the tag is attempted, the break away element fractures the ampules and also exposes the outside of the cover component to the staining substance.