Alarm tag

• US 5,969,614 A
• Filed: 04/13/1998
• Issued: 10/19/1999
• Est. Priority Date: 10/12/1995
• Status: Expired due to Fees

• Current Assignee: MW Trading UK Ltd.
• Original Assignee: MW International Ltd.
• Inventors: Holmgren, Bertil
• Primary Examiner(s): SWANN III, GLEN R
• Application Number:
  US09/051,580
• Time in Patent Office: 554 Days
• Field of Search: 340/572.1, 340/572.9, 340/693.5, 340/388.4, 340/391.1
• US Class Current: 340/572.9
• CPC Class Codes: E05B 73/0017 Anti-theft devices, e.g. tags or monitors, fixed to articles, e.g. clothes, and to be removed at the check-out of shops
• CPC Class Codes: G08B 13/2434 Tag housing and attachment details
• CPC Class Codes: G10K 9/18 Details, e.g. bulbs, pumps, pistons, switches or casings

Abstract

An alarm tag made of two parts, one of which is provided with a pin (13) attached to the one part (12) to be located on one side of the product (11) with the pin extending through the product into locking engagement with the other part (10) located on the opposite side of the product. A resonance chamber (29), mounted in the one part (12), having a central outlet (30) is provided for activating the alarm device. A cover (19) is mounted on the one part (12) over the resonance chamber, and includes a central portion in register with the outlet (30), and bars (36) extending radially from the central portion (35) to the periphery of the cover, the bars defining slots (37) between adjacent bars.

Claims

1. Alarm tag comprising two parts one of which is provided with a pin (13) attached to said one part (12) to be located on one side of a product (11) with the pin extending through the product into locking engagement with the other part (10) located on the opposite side of the product, said one part having means for activating an alarm device in said one part, characterized in that the alarm device comprises a resonance chamber (29) having a central outlet (30), and a cover (19) mounted on said one part (12) over said resonance chamber, said cover having a central portion in register with said outlet (30), and bars (36) extending radially from said central portion (35) to the periphery of the cover, said bars defining slots (37) between adjacent bars.

2. Alarm tag as in claim 1, characterized in that said bars (36) extend along a side wall of the cover.

3. Alarm tag as in claim 1 or 2, characterized in that said bars (36) are channelled at the back side thereof.

4. Alarm tag as in claim 3, characterized in that the channels formed by said bars (36) open at the lower end thereof spaced from the lower side of said one part (12).