Perimeter Alarm Conductor Loop for Theft Deterrent Housing
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Solution Overview
Problem
Existing theft deterrent devices can be disabled by shoplifters cutting through the housing with snips or other tools, rendering the alarm system inoperable, as the rigid plastic housings are vulnerable to metalworking tools.
Innovation Solution
Incorporating an alarm conductor, such as an electrical or fiber optic conductor, that extends around the perimeter of the housing and/or the audible alarm speaker, which actuates the alarm when severed, preventing the device from being disabled by cutting mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the housing is made of rigid plastic to protect internal components, then the structural strength is improved, but the housing becomes vulnerable to cutting tools like snips
Solution Approach 1:
The alarm conductor is pre-installed in a loop configuration around the speaker and through the housing before any tampering occurs. This preliminary placement ensures that the conductor is positioned to be severed first during any cutting attempt, automatically triggering the alarm before the speaker can be disabled.
Solution Approach 2:
The invention converts the harmful action of cutting (which thieves use to disable the speaker) into a beneficial alarm trigger. By positioning the conductor so it must be cut first, the harmful cutting action actually activates the alarm system, alerting security personnel to the theft attempt.
2Reliability
If the alarm conductor is placed around the speaker perimeter, then the detection of tampering is improved, but the device complexity increases
Solution Approach 1:
The alarm conductor loop is merged with the existing speaker mounting structure and housing features. The conductor utilizes the same spatial perimeter as the speaker, integrating the detection function into the existing device geometry rather than adding separate detection components.
Solution Approach 2:
The conductor loop serves multiple functions: it acts as a structural element within the housing, provides the alarm trigger path, and defines the perimeter for tampering detection. This multi-functionality reduces the need for additional separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The alarm conductor ensures that the security device sounds an alarm even if the housing is tampered with, alerting store personnel and deterring further attempts to disable the device, thereby maintaining the security of the protected article.
Implementation Method 1
an audible alarm which emits a high pitched alarm sound through a speaker, such as a piezoelectric speaker
Implementation Method 2
a magnetically attractable locking mechanism
Data Source
AI summary
A security device for attachment to an article to deter theft has a housing containing an alarm system including an audible alarm speaker. The alarm system includes a conductor located within the housing which forms a loop that extends at least partially about the alarm speaker or about the periphery of the housing. The conductor which can be an electrical conductor, fiber optic conductor, light pipe, etc., when severed by a thief will actuate the audible alarm.