Compass Drawing Arcs Without Center Access
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Solution Overview
Problem
Conventional compasses are inefficient and complex to use when drawing large arcs or circles without access to the center or when there are barriers between the center and the arc.
Innovation Solution
A compass device with a chassis, angled and fixed guide wheels, a protractor, offset axis frame, laser pointer, balance base, and marker, allowing for the drawing of arcs and circles on flat surfaces without needing to access the center, with adjustable components for precision and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional compass is used to draw arcs and circles, then the center must be accessible, but this becomes impossible when the center is not accessible or there are barriers between the center and the arc
Solution Approach 1:
The invention extracts the center-finding requirement from the traditional compass operation. By using two guide wheels that roll along the surface, the system determines the arc center indirectly through the motion geometry of the wheels, eliminating the need for direct access to or identification of the center point before drawing begins.
Solution Approach 2:
The two guide wheels act as intermediary elements between the drawing surface and the marking mechanism. These wheels roll along the arc path and, through their rotational motion and geometric relationship, mediate the conversion of surface motion into precise circular drawing without requiring direct access to the arc center.
2Manufacturing precision
If a conventional compass is used for large radius arcs, then the device becomes complex and time-consuming to use
Solution Approach 1:
The drawing mechanism is segmented into distinct functional modules: two guide wheels for motion guidance, a marking wheel for drawing, and a chassis for structural support. This segmentation allows each component to be optimized independently and simplifies the overall device while maintaining precision for large radius arcs.
Solution Approach 2:
The guide wheels serve multiple functions: they guide the motion of the device, determine the arc radius through their spacing, and enable drawing on both small and large radius arcs. This multi-functionality reduces the need for multiple specialized tools or complex adjustment mechanisms.
3Productivity
If a conventional compass is used when there is a barrier between the center and the arc, then the operation becomes inefficient
Solution Approach 1:
The invention removes the requirement for center access from the drawing process. By using the guide wheels to determine position and motion through their rolling contact with the surface, the system can draw arcs even when the center is blocked by barriers, significantly improving productivity in constrained environments.
Data Source
AI summary
The embodiments herein disclose a compass for drawing arcs and circles without the need for accessing the center. The compass comprises a chassis fixed with a first guide wheel and a second guide wheel at two opposite ends. A protractor is fixed to the first guide wheel for setting an angle for the first guide wheel. An offset wheel is installed under the offset axis frame arranged perpendicular to the chassis next to the second guide wheel. A tool holder is mounted on the offset axis frame using a clip. A laser pointer is mounted on the offset axis frame for identifying a desired part of the arcs and circles. A balance wheel is attached to the balance base arranged perpendicular to the chassis for maintaining a stability of the compass. A marker is inserted in a tool holder for marking the arcs and circles.