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Theft deterrent device including a spring washer

An anti-theft device and technology in the device, which can be applied to devices for locking portable objects, identification devices, applications of locks, etc., and can solve problems such as non-disposability

Inactive Publication Date: 2011-08-31
CHECKPOINT SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of such typical anti-theft devices is that they are not disposable

Method used

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  • Theft deterrent device including a spring washer
  • Theft deterrent device including a spring washer
  • Theft deterrent device including a spring washer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Referring now to the drawings, a first embodiment of the anti-theft device of the present invention is generally shown as Figure 1 to Figure 6 10 shown. As shown below, the first embodiment is not reusable. now refer to figure 1 , the anti-theft device 10 is basically two parts, including the pin 14 and the housing 17 . The pin 14 includes a shank 16 . Housing 17 , which may be made of any suitable material, such as plastic, includes ball cavity 31 . The ball chamber 31 is delimited by a radially symmetrical wall 33 tapering towards a limiting end 34 and a spring washer 22 opposite the limiting end 34 . The lumen 18 is located within the ball cavity 31 . A set (four) of balls 26 is located within the cavity 18 and a funnel 30 is located below the spring washer 22 . It should be understood that fewer or more balls 26 may be used without departing from the scope of the present invention. Ball 26 may be constructed of any suitable material, preferably a magnetic ma...

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PUM

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Abstract

A device to protect an article from theft is disclosed. The device includes a pointed pin member to enable attachment of the device to the article to be protected from theft. A housing disposed within the device includes a floor and a wall tapering towards a confining end. The housing includes coaxial openings for insertably receiving the pin member. A ball clutch mechanism is located within the housing and includes a plurality of balls. As the balls are urged towards the confining end of the housing, they wedge between the tapering wall and the pin member to apply increasing radial pressure against the pin member to prevent it from being withdrawn from the device. The floor includes a member which deflects downwardly upon insertion of the pin member into the housing to apply a radial force against the pin member to frictionally engage it within the device.

Description

[0001] Cross References to Related Applications [0002] This PCT application requires provisional application number 61 / 086,952 filed August 7, 2008 under 35 U.S.C. § 119(e) entitled "Anti-Theft Device Containing Spring Washers" Interest, the entire disclosure of which is incorporated herein by reference. technical field [0003] This invention relates to an improvement in anti-theft devices of the type including pin clutch mechanisms. The present invention also relates to improvements in such pin clutch mechanisms wherein the pin is released from the clutch mechanism in response to application of a magnetic field. Background technique [0004] Anti-theft devices are attached to items, such as merchandise, to prevent theft of such items. Anti-theft devices are known which electronically operate to sound an alarm when an object to which it is connected is removed from the surveillance location without first removing it. Typically, such antitheft devices include means for ...

Claims

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Application Information

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IPC IPC(8): E05B73/00G09F3/12E05B15/04E05B47/00
CPCG09F3/0305G09F3/12E05B73/0052E05B73/0017E05B2015/0465G09F3/0317Y10T24/50Y10T70/5004
Inventor 托马斯·J·麦基翁
Owner CHECKPOINT SYST INC