Security
First Claim
1. A security system for protecting articles, the system comprising at least one Emitting Unit, and one Detecting Unit attached to each article to be protected, characterized in that there is further provided at least one Electronic Article Surveillance (EAS) loop of a type used for detecting the passage of traditional EAS tags, wherein the Detecting Unit has a detector for detecting electromagnetic fields emitted by the EAS loop and the Emitting Unit and distinguishing between them, and an alarm generator for generating an alarm if a predetermined sequence of fields is detected.
2 Assignments
0 Petitions
Accused Products
Abstract
A security system for protecting articles (8), the system comprising at least one Electronic Article Surveillance (EAS) loop (1) , one Emitting Unit (7) and one Detecting Unit (9) attached to each article (8) to be protected, the Detecting Unit (9) having a detector to detect electromagnetic fields emitted by the EAS loop (4) and the Emitting Unit (7) and to distinguish between them, and an alarm generator for generating an alarm if a predetermined sequence of fields is detected. The system combines existing EAS loops (4) normally present in a retail store with Emitting Units (7) and Detecting Units (9) so as to monitor movement of articles (8), especially supermarket trolleys, around the retail store.
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Citations
39 Claims
- 1. A security system for protecting articles, the system comprising at least one Emitting Unit, and one Detecting Unit attached to each article to be protected, characterized in that there is further provided at least one Electronic Article Surveillance (EAS) loop of a type used for detecting the passage of traditional EAS tags, wherein the Detecting Unit has a detector for detecting electromagnetic fields emitted by the EAS loop and the Emitting Unit and distinguishing between them, and an alarm generator for generating an alarm if a predetermined sequence of fields is detected.
- 13. A system as claimed in claim l, wherein the Emitting Unit is adapted selectively to emit an electromagnetic radiation pattern chosen from a set of characteristic electromagnetic radiation patterns, the selection being made in response to a switch setting or an external signal.
- 22. A method of providing security for articles, wherein there is provided at least one Emitting Unit, and at least one Detecting Unit attached to each article to be protected, characterized in that there is further provided at least one Electronic Article Surveillance (EAS) loop of a type used for detecting the passage of traditional EAS tags, wherein the Detecting Unit detects electromagnetic fields emitted by the EAS loop and the Emitting Unit and distinguishes between them, an alarm being generated if a predetermined sequence of fields is detected.
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38. A security system for protecting articles, the system comprising at least one electronic Article surveillance (EAS) loop, one Emitting Unit and one Detecting Unit attached to each article to be protected, the Detecting Unit having a detector to detect electromagnetic fields emitted by the EAS loop and the Emitting Unit and to distinguish between them, and an alarm generator for generating an alarm if a predetermined sequence of fields is detected.
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39. A method of providing security for articles, wherein there is provided at least one Electronic Article Surveillance (EAS) loop, at least one Emitting Unit, and at least one Detecting Unit attached to each article to be protected, and wherein the Detecting Unit is adapted to detect electromagnetic fields emitted by the EAS loop and the Emitting Unit and to distinguish between them, an alarm being generated if a predetermined sequence of fields is detected.
Specification