Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-11-09
1997-06-10
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340665, 340666, 340668, 340693, 367199, G08B 1314
Patent
active
056380496
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an exhibit or display device equipped with a crime prevention equipment (hereinafter also referred to as "crime prevention display device") which is used for exhibiting or displaying an interior or exterior decoration such as a picture, a sculpture, a craftwork, a panel or the like, and a burglarproof or theftproof method for controlling crime prevention and alarm for an exhibit (hereinafter also referred to as "exhibit crime prevention alarm control method") and an apparatus therefor.
BACKGROUND ART
In general, it is known to employ a crime prevention system in an art museum or any other exhibition hall to ensure theft prevention and safety management of a picture or any other article of value when it is exhibited therein. Such a conventional crime prevention system is typically constructed in combination with generation of an alarm and/or watching by a guard. For the purpose of night maintenance and management of security, it is widely employed to secure locking-up management of a building. Also, an alarm network for detecting opening of a door or a window or a control system by a radio wave is widely employed as well.
Unfortunately, the conventional control systems described above each are insufficient to prevent theft of an exhibit. Also, the control system utilizing transmission of a radio wave not only causes the control to be troublesome due to regulation on outputting of a radio wave but frequently causes malfunction due to radio hindrance or radio interference, resulting in bringing about troubles due to wrong information and adversely affecting post-management. Also, it causes facilities for the control to be expensive, to thereby be unsuitable for simple exhibition or display. Further, it is insufficient to prevent an exhibit such as a picture or the like from being stolen during exhibition or display. In addition, watching by a guard fails to provide a satisfactory antitheft effect. Thus, the prior art renders maintenance and management of security highly troublesome and fails to provide satisfactory security or safety.
The present invention has been made in view of the foregoing disadvantages of the prior art and an object of the present invention is to provide a crime prevention display device, an exhibit crime prevention alarm control method and an apparatus therefor which are capable of preventing an individual article or exhibit from being stolen and ensuring satisfactory maintenance and management of security free of any wrong information while exhibiting an economical advantage.
Another object of the present invention is to provide a display device which is capable of permitting suspension, stretching and tightening of an exhibit suspension wire to be readily and rapidly accomplished, positively detecting holding and removal of an article with respect to the device, and safely and positively accomplishing suspension of the article.
DISCLOSURE OF INVENTION
In accordance with one aspect of the present invention, a crime prevention display device is provided. The display device comprises a casing provided therein with a chuck mechanism for gripping a wire inserted therethrough, a crime prevention alarm circuit, and a load detection means connected to the crime prevention alarm circuit and arranged for detecting a variation in load applied from an exhibit thereto. In the crime prevention display device thus constructed, the load detection means detects a variation in load when the exhibit is removed from the display device, to thereby actuate the crime prevention alarm circuit, leading to warning of the abnormality by alarm display by a buzzer or the like.
In accordance with another aspect of the present invention, an exhibit crime prevention alarm control method is provided. The method comprises the steps of generating an alarm sound due to removal of an exhibit from a display device, collecting the alarm sound to obtain a sound wave signal, converting the sound wave signal into a pulse signal by means of an A/D conversion circuit, removing s
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Arakawa & Co. Ltd.
Hofsass Jeffery
Lee Benjamin C.
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