Variable Radius Arc Scribing Arrangement for Framing Square
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Solution Overview
Problem
Construction layout tools, such as framing squares, lack the ability to easily create arcuate marks on workpieces, as traditional methods like using a compass may not be readily available on-site and are difficult to employ, especially for making precise arcuate cuts.
Innovation Solution
A layout tool with a variable location pivot point arrangement and mark openings, allowing a position fixing member to be engaged to define a pivot point, enabling the tool to create arcuate marks by pivoting about the fixed point with a marking instrument, where the pivot point's location corresponds to the desired radius through a slot with serrated sides and mark openings spaced along the tool's arm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a compass is used to create arcuate marks, then arcuate marking capability is achieved, but device availability and ease of operation deteriorate because compasses are not readily available on-site and are difficult to employ
Solution Approach 1:
The patent combines the arcuate marking function with the framing square by integrating a slot and multiple pivot openings directly into the square's body. This merging eliminates the need for separate tools like compasses, making the arcuate marking capability immediately available whenever the framing square is used on-site.
Solution Approach 2:
The framing square is transformed into a multi-functional tool that performs both its traditional right-angle layout function and arcuate marking function. The slot and pivot openings enable the square to serve as both a positioning tool and a compass-like marking device, increasing its versatility without adding separate tools.
2Adaptability or versatility
If a compass is used to create arcuate marks, then arcuate marking capability is achieved, but device availability deteriorates because compasses are not readily available on-site
Solution Approach 1:
The patent combines the arcuate marking function with the framing square by integrating a slot and multiple pivot openings directly into the square's body. This merging eliminates the need for separate tools like compasses, making the arcuate marking capability immediately available whenever the framing square is used on-site.
3Adaptability or versatility
If multiple pivot openings are provided at different locations, then variable radius capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the pivot point functionality by providing multiple discrete pivot openings at different locations along the framing square. Each opening serves as a potential pivot point for creating arcs of different radii. This segmentation allows variable radius capability while maintaining relatively simple construction, as each opening is a straightforward feature rather than a complex mechanism.
Data Source
AI summary
A layout tool for scribing an arc includes an arm, a variable location pivot point arrangement on the arm, and a plurality of mark openings spaced from the pivot point arrangement. A position fixing member, such as a nail, is engaged with the pivot point arrangement to fix the position of the tool on a workpiece at a pivot point defined by the position fixing member. A marking instrument is engaged within one of the mark openings, and the tool is pivoted on the workpiece about the pivot point to make an arcuate mark on the workpiece at a radius defined by the location of the position fixing member relative to the mark opening within which the marking instrument is engaged. The tool may be a square, which is configured with two arms that extend away from each other at a predetermined angle.