Framing Square Pivot Opening Arc Marking

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Solution Overview

Problem

Conventional framing squares lack an integrated protractor feature for easily marking common arc shapes, requiring separate tools and complicating the measurement of right angles and arcs in carpentry and construction tasks.

Innovation Solution

A framing square design incorporating a pivot opening and strategically positioned marking openings allows users to mark arcs by pivoting the tool around a fixed point, enabling the creation of various arc shapes without additional tools, enhancing usability and robustness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional framing square design is used, then the tool structure remains simple and robust, but it lacks integrated protractor feature requiring separate tools for arc marking

Engineering Contradiction:

Improvefunctional integrationVSAvoidtool structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges a protractor feature into the traditional framing square by integrating a pivot opening and multiple marking openings at predetermined distances from the pivot. This allows the single tool to perform both traditional framing functions and arc marking functions, eliminating the need for separate protractor or compass tools while maintaining structural simplicity.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If multiple marking openings are added to the blade, then arc marking capability is enabled, but the solid region length is reduced

Engineering Contradiction:

Improvearc marking capabilityVSAvoidsolid region length

Core Design Contradiction:

Adaptability or versatilityVSLength of moving object

Solution Approach 1:

The blade is segmented into a solid region and a marking region. The marking openings are strategically positioned within the marking region, which is a portion of the blade extending along the longitudinal axis. This segmentation allows multiple marking openings to be incorporated without significantly compromising the overall structural integrity and length of the solid region, as the markings are confined to a specific zone.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If marking openings are positioned closer together, then more arc radii can be marked, but the distance between first and last marking opening decreases

Engineering Contradiction:

Improvenumber of arc radiiVSAvoiddistance between marking openings

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The marking openings are positioned at specific predetermined distances from the pivot opening along the blade's longitudinal axis, creating localized marking zones. This allows for multiple arc radii to be marked with appropriate spacing, ensuring that each marking opening serves its function while maintaining sufficient distance between them for practical use. The local quality of the marking region is optimized to provide multiple radii without excessive crowding.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11110739B2Framing square

Publication Date: 2021.09.07 MILWAUKEE ELECTRIC TOOL CORP

AI summary

A framing square including an integrated protractor feature is provided. The framing square includes a blade section, and a tongue section joined at a corner section. The corner section further includes a pivot opening, to rotatably couple the framing square to a workpiece. The blade section includes an array of marking openings. The marking openings are spaced from each other in the array, and the array is positioned a first distance from the pivot opening along a longitudinal axis of the blade. The marking openings can be sized to receive a particular marking instrument (e.g., a pencil or knife) for use with a particular framing square.