Compression Framing with Friction Shoes for Historic Facades
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Solution Overview
Problem
Existing methods for retrofitting security measures on historic buildings with stone or granite cladding damage the exterior surfaces when attempting to prevent forced entry, compromising the building's aesthetic and structural integrity.
Innovation Solution
A compression framing system with compression arms and friction shoes that engage with opposing mounting surfaces, exerting expansive force to secure protective structures without penetrating or damaging the mounting surface, allowing for easy installation, maintenance, and adjustment of expansion force based on surface strength and protection needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drilling or heavy adhesives are used to attach security measures, then forced entry prevention is improved, but the external cladding surface is damaged
Solution Approach 1:
The patent introduces a compression frame system with friction shoes as an intermediary between the security window and the building facade. The friction shoes engage with the facade surface through friction without penetrating it, thereby preventing forced entry while avoiding damage to the historic cladding. This mediator approach resolves the contradiction by providing secure attachment without direct harmful contact.
Solution Approach 2:
The invention replaces the traditional mechanical drilling and adhesive attachment systems with a compression-based friction system. Instead of using drills that penetrate or heavy adhesives that chemically bond (both damaging to historic surfaces), the system uses adjustable compression forces applied through friction shoes that contact the surface non-destructively, substituting a new mechanical principle that achieves security without damage.
2Reliability
If traditional security window retrofitting methods are used, then security protection is achieved, but the historic architecture aesthetic is compromised
Solution Approach 1:
The compression frame system acts as an intermediary layer between the security window and the historic facade. It provides the necessary structural support and security function while remaining visually subordinate to the historic architecture, thus protecting both the building's aesthetic appearance and its security needs simultaneously.
Solution Approach 2:
The system applies compression forces locally at specific contact points through friction shoes rather than requiring widespread penetration or visible attachment hardware across the entire facade. This localized approach minimizes visual impact on the historic surface while providing adequate security protection at critical points.
3Object-affected harmful factors
If compression framing system is installed to avoid surface damage, then cladding integrity is preserved, but installation complexity increases
Solution Approach 1:
The compression frame system incorporates adjustable compression arms with expansion controllers that allow dynamic adjustment of the compression force. This dynamic capability enables the system to adapt to varying facade surface conditions and strength characteristics, simplifying the installation process by eliminating the need for precise pre-drilling or surface preparation while maintaining integrity preservation.
Solution Approach 2:
The system allows adjustment of compression parameters (force magnitude, distribution) to match the specific characteristics of different historic facades. By changing these parameters rather than requiring complex custom fabrication for each building, the system reduces installation complexity while preserving cladding integrity across diverse historic structures.
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 system effectively secures protective structures to historic buildings without damaging the exterior, providing tamper-proof security that can withstand forced entry attempts while maintaining the building's appearance and structural integrity.
Implementation Method 1
a friction shoe configured to engage directly with a corresponding opposing mounting surface of the opposing mounting surfaces
Implementation Method 2
an expansion controller associated with the hollow pipe body of the first compression arm; wherein the expansion controller is configured to selectively adjust a separation distance between the friction shoe of the first compression arm and the friction shoe of the second compression arm
Data Source
AI summary
A compression framing system configured to engage with opposing mounting surfaces, the compression framing system having a compression frame, the compression frame having: a first compression arm and a second compression arm, each compression arm having: a hollow pipe body; and a friction shoe associated with the hollow pipe body, said friction shoe being configured to engage directly with the mounting surface; an inner support beam configured to secure the first compression arm to the second compression arm; and an expansion controller associated with the hollow pipe body of the first compression arm; wherein the expansion controller is configured to selectively adjust a separation distance between the friction shoe of the first compression arm and the friction shoe of the second compression arm. The compression framing system is configured to provide a mounting structure frictionally engaged with opposing mounting surfaces for non-destructive attachment of a protective structure.