Antitheft protection for goods for shop-lifting alarm system

摘要

A defined substance is applied to the goods in an anti-theft system, which can be picked-up selectively in molecular distribution by a sensor (5), which is coactively coupled to a change-over switch, triggering an alarm on picking-up the specified substance. During the buying of the protected goods, the substance is neutralised, or converted, so that it is not recognised by the sensor. Pref. the substance has a selected smell, neutralised during normal buying. The exit gate comprises at least one air suction duct (13), with its ends fitted with the sensor.