ELECTRONIC ARTICLE SURVEILLANCE ANTENNA FOR ATTACHMENT TO A VERTICAL STRUCTURE

ELECTRONIC ARTICLE SURVEILLANCE ANTENNA FOR ATTACHMENT TO A VERTICAL STRUCTURE

An acousto-magnetic electronic article surveillance antenna (1) is provided that attaches directly to a vertical structure (2) with the electromagnetic field (9) projected across an opening (10), such as an exit or entrance to a building or other defined area. The vertical structure could be a doorf...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: VALADE, FRANKLIN H., JR, COULSON, PAUL G, FERNANDEZ, GILBERT, FORNEY, JAN B, CLUCAS, ROBERT
Format: Patent
Sprache:eng ; fre
Schlagworte:
ALARM SYSTEMS
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
CALCULATING
COMPUTING
COUNTING
DETECTING MASSES OR OBJECTS
ELECTRICITY
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
HANDLING RECORD CARRIERS
MEASURING
ORDER TELEGRAPHS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
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Beschreibung
Zusammenfassung:An acousto-magnetic electronic article surveillance antenna (1) is provided that attaches directly to a vertical structure (2) with the electromagnetic field (9) projected across an opening (10), such as an exit or entrance to a building or other defined area. The vertical structure could be a doorframe or wall, constructed from a wide variety of materials, including metal, wood, glass, concrete or gypsum wallboard. The antenna geometry (14, 15) is elongated vertically to allow a corresponding decrease in width projected fr om the vertical structure, thereby reducing the apparent size of the antenna an d providing a near-concealed appearance and protection from physical damage.