Antitheft device for articles

• US 5,066,942 A
• Filed: 09/11/1990
• Issued: 11/19/1991
• Est. Priority Date: 06/01/1990
• Status: Expired due to Term

• Current Assignee: Matsuo Sangyo Kabushiki Kaisha
• Original Assignee: Matsuo Sangyo Kabushiki Kaisha
• Inventors: Matsuo, Toichiro
• Primary Examiner(s): Swann, III, Glen R.
• Application Number:
  US07/580,674
• Time in Patent Office: 434 Days
• Field of Search: 340/568, 340/571, 340/540, 340/546, 340/548, 361/170, 116/67
• US Class Current: 340/568.2
• CPC Class Codes: G08B 13/149 with electric, magnetic, capacitive switch actuation

Abstract

An antitheft device for articles includes a plurality of article connection cords, a cord connection part including a plurality of terminal parts which are connected in series and are closed by the connection to the cords, respectively, and a monitor part which is connected to the cord connection part, and which is not to operate when the terminal parts are closed and which is to operate when at least one of the terminal parts opens. The antitheft device further includes an auxiliary alarm device connected to at least one of the terminal parts in the cord connection part, and a drive device for driving the auxiliary alarm device corresponding to the terminal part or parts which open when the monitor part raises an alarm. In the device, it is possible to rapidly and specifically find when an article is stolen or when an attempt to steal was made or when the article connection cord is disengaged or loosened.

Claims

1. An antitheft device for articles comprising:

a plurality of article connection cords, each cord connected to a respective article;

a cord connection part including a plurality of terminal parts connected in series by connection to said plurality of cords, respectively;

a monitor part connected to said cord connection part, such that said monitor part will not operate when said terminal parts are connected in series by said cords and will operate when a) at least one of said terminal parts is disconnected from said cords or b) when at least one of said cords is cut or loosened;

auxiliary alarm means connected in parallel to at least one of the terminal parts in said cord connection part; and

drive means for driving said auxiliary alarm means, corresponding to said terminal part or parts which is disconnected, when said monitor part outputs an alarm.

2. An antitheft device for articles according to claim 1 wherein at least one of said terminal parts is connected directly to said auxiliary alarm means.

3. An antitheft device for articles according to claim 1 wherein at least one of said article connection cords includes a switch, which is closed when said cord is connected to a protected article, and said auxiliary alarm means, associated with said terminal part to which the cord including said switch is connected, is connected in parallel to the terminal part through the cord.

4. An antitheft device for articles according to claim 3 wherein said auxiliary alarm means is associated with said switch.

5. An antitheft device for articles according to claim 1 wherein said monitor part includes a primary alarm means for warning.

6. An antitheft device for articles according to claim 1 wherein said auxiliary alarm means is connected to said terminal parts through at least one of said plurality of article connection cords.