Alarm tag for an electronic article surveillance system

Details Alarm tag for an electronic article surveillance system Alarm tag for an electronic article surveillance system

1991-11-27

1994-11-22

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

70 571, 340572, G08B 1300, E05B 6500

Patent

active

053672895

ABSTRACT:
An electronic article surveillance tag which is responsive to forces applied to the tag's housing. The tag has a piezoelectric film which is attached to the tag housing in such a way that forces which are applied to the tag housing are mechanically coupled to the piezoelectric film. The piezoelectric film generates a voltage which is proportional to the forces mechanically coupled thereto. An alarm detecting means compares the voltage generated by the piezoelectric film with a predetermined reference voltage, and initiates an audible alarm when the voltage generated exceeds the predetermined reference voltage.

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