Cable Railing Termination with Hidden Ferrule Tensioning
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Solution Overview
Problem
Cable railing systems are costly due to expensive cable termination fittings, which are large, complex, and visually obstructive, contradicting the objective of minimizing view obstruction and being maintenance-free.
Innovation Solution
A cable termination fitting comprising a tubular component with external threads and a ferrule that securely attaches the cable to an anchor point, allowing for tensioning without visible exposure, featuring a design that is small, simple, and easy to install.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cable termination fittings are used, then the cable can be securely attached and tensioned, but the fittings become large, complex, and visually obstructive
Solution Approach 1:
The invention divides the cable attachment system into two separate components: a ferrule that attaches to the cable end, and a post mounting assembly that attaches to the post. This segmentation allows each component to be simpler and smaller while maintaining secure attachment through the coordinated action of both parts.
Solution Approach 2:
The ferrule is inserted into the tubular component of the post mounting assembly, creating a nested configuration where the cable attachment element is housed within the post mounting element. This nesting reduces the overall visual exposure and physical footprint of the termination hardware.
2Reliability
If traditional cable termination fittings are used, then the cable can be securely attached and tensioned, but the fittings become large and visually obstructive
Solution Approach 1:
By separating the cable attachment function (ferrule) from the post mounting function (tubular component), the invention reduces the size of each individual component. The ferrule is compact and fits within the tubular component, minimizing the overall area occupied by the termination assembly.
Solution Approach 2:
The ferrule nests within the tubular component, allowing both elements to occupy the same spatial envelope. This nested arrangement significantly reduces the visual exposure and physical footprint compared to traditional fittings where all components are externally visible.
3Ease of repair
If swageless fittings are used to allow disconnection and reuse, then the fittings can be reused if a mistake is made, but the fittings become larger and more complex
Solution Approach 1:
The post mounting assembly incorporates a threaded connection that allows the tubular component to be easily attached and detached from the post. This dynamic, reversible connection enables reuse without requiring complex swageless mechanisms, achieving ease of repair through simple threading rather than sophisticated release mechanisms.
4Reliability
If cable termination fittings are exposed outside posts, then the cables can be attached and tensioned, but the view through the railing is obstructed
Solution Approach 1:
The ferrule containing the cable attachment is nested within the tubular component that mounts to the post. This nested configuration allows the cable termination to be housed within the post structure rather than protruding outward, minimizing visual obstruction while maintaining secure cable attachment.
Solution Approach 2:
The invention extracts the cable attachment function from the visible exterior of the post and relocates it to the interior space within the post. The ferrule and tubular component work together to move the termination hardware from an exposed position to a concealed position within the post structure.
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 solution reduces the visual and cost impact of cable termination hardware, enhancing the aesthetic appeal and cost-effectiveness of cable railing systems while maintaining secure attachment and tensioning of cables.
Implementation Method 1
The ferrule or cable stop or sleeve is swaged to the cable end, attaching it firmly to the cable
Implementation Method 2
The external threads may engage mating threads in a hole in a solid material such as a wooden post
Implementation Method 3
The ferrule or cable stop or sleeve is swaged to the cable end, attaching it firmly to the cable. One end of the ferrule provides a thrust bearing surface for contact with the second end of the tubular component, allowing for the rotation of the tubular component to tension the cable while the cable does not rotate
Data Source
AI summary
A cable gripping and tensioning apparatus is provided for attaching a cable to an anchor point such as a wooden post as part of a cable railing system. In one form, the apparatus includes a tubular component and a ferrule. The tubular component includes external threads to engage the wall of a hole in the post, an internal axial bore through which a cable may pass, a first end which may engage a wrench to rotate the tubular component and a second end which may provide a thrust bearing surface. The ferrule is swaged to an end portion of the cable. The ferrule provides a thrust bearing surface for contact with the second end of the tubular component, allowing for the rotation of the tubular component to tension the cable while the cable does not rotate.