L-Shaped Corner Piece Reinforcement for Window Break-In Resistance
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Solution Overview
Problem
Existing window reinforcement systems with polymeric or plastic films are ineffective against burglars who target the weak points at the corners of the window frame, as the mitered corners of the trim strips disrupt structural continuity and allow inward deflection of the reinforced window.
Innovation Solution
The introduction of 'L' shaped corner pieces with adhesive pads and stop pin receiving sockets, along with trim engaging pins or lugs, creates a structural reinforcement that enhances the corner zones' strength by forming a continuous tie between the window and its frame, preventing inward deflection and making the corners less susceptible to breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If mitered corner trim strips are used to reinforce windows, then the structural continuity of the trim is improved, but the corner zones remain weak points susceptible to burglar impacts
Solution Approach 1:
The corner piece is divided into two functional segments: an L-shaped trim portion for structural reinforcement and an integrated corner reinforcement portion with increased thickness and density. This segmentation allows each part to serve its specific function while working together as a unified corner assembly.
Solution Approach 2:
The corner reinforcement portion is designed with locally enhanced properties - increased thickness, higher material density, and concentrated adhesive application zones - specifically at the corner zone where strength is most needed, while the extending legs maintain standard trim characteristics for integration with the overall window frame.
2Strength
If thicker polymeric film appliques are applied to glass windows, then protection against bomb blasts and storm debris is improved, but the windows remain vulnerable to purposeful breakage at edges and corners
Solution Approach 1:
The corner pieces are pre-installed on the window frame before the polymeric film is applied. This preliminary action ensures that the corner reinforcement structure is already in place to prevent inward deflection and guide the film application process, creating a integrated reinforcement system that addresses both blast protection and breakage resistance.
Solution Approach 2:
The solution combines multiple materials and structures: the L-shaped trim strip material, the corner reinforcement portion with enhanced density and thickness, the polymeric window film, and adhesive bonding. This composite approach creates a multi-layered defense system that addresses different types of threats.
3Reliability
If adhesively applied trim strips are used to reinforce windows, then the window's ability to remain in place during impacts is improved, but the trim creates weak points at mitered corners that invite burglar impacts
Solution Approach 1:
The corner reinforcement portion acts as an intermediary element between the L-shaped trim strip and the window frame. It provides a transition zone that distributes stresses and forces, preventing the concentration of loads at the mitered corners while maintaining the adhesive bonding interface.
Solution Approach 2:
The integrated corner piece with enhanced thickness and density serves as a pre-positioned cushioning element at the vulnerable corner zones. This prior cushioning absorbs and distributes impact forces before they can concentrate at the mitered joints, preventing the trim from failing under burglar attacks.
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
This solution significantly increases the reinforced window's ability to resist breakage attempts by burglars, transforming weak corner zones into areas of substantial strength and integrity, thereby enhancing the overall security of the window.
Implementation Method 1
adhesive pads attached to the corner pieces' window contacting and frame contacting faces
Data Source
AI summary
A break-in resistant window assembly whose components include a window pane having at least a pair of edges and a corner; a frame boarding the window pane; a sheet of polymeric film overlying the pane, a first adhesive layer fixedly interconnecting the pane and the sheet of polymeric film; and a corner assembly which includes a base portion and a cover portion which are able to be mechanically locked to each other to complete a corner assembly. The base portion includes adhesive pads for bonding both to the corner of the window pane and the corner of the window frame. Trim pieces which abut the base portion are also bonded to the window pane and the window frame by adhesive pads. The cover portion is arranged to extend over the abutting ends of the base portion and the trim pieces and thereby conceal any mismatch between those abutting edges.