Parallel Compass Drawing Arcs Without Center Access
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Solution Overview
Problem
Conventional compasses are inefficient and complex when drawing arcs and circles, especially for large radii or when the center is inaccessible or obstructed, and they require external framework control.
Innovation Solution
A compass device with a chassis, angled and fixed guide wheels, a protractor, offset axis frame, laser pointer, balance base, and automatic controllers for precise angle and position adjustments, allowing for drawing arcs and circles without center access and varying radii on flat surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional compasses are used to draw arcs and circles, then the center must be accessible and external framework control is required, but this becomes complex and inefficient when the center is inaccessible or obstructed
Solution Approach 1:
The invention extracts the center point requirement from the drawing process. Instead of requiring access to the center, the parallel compass uses two guide wheels that roll along the surface, with the marking point maintaining a constant offset distance from the path defined by the wheels. This eliminates the need for center access and external framework control.
Solution Approach 2:
The invention introduces guide wheels as intermediary elements between the user's movement and the marking action. The guide wheels roll along the surface and define the path, while the marking point follows parallel to this path at a fixed offset distance, mediated by the rigid chassis structure.
2Length of stationary object
If conventional compasses are used for large radius arcs, then the compass structure becomes unwieldy and difficult to control, but the invention enables large radius drawing with improved stability
Solution Approach 1:
The invention transitions from a radial drawing mechanism (conventional compass) to a parallel tracking mechanism. Instead of rotating around a center point, the marking point follows a path parallel to the guide wheels' trajectory, maintaining constant offset distance. This dimensional change enables large radius drawing without unwieldy structure.
3Adaptability or versatility
If conventional compasses require center access, then drawing is simple when center is accessible, but becomes impossible or complex when center is obstructed by barriers
Solution Approach 1:
The invention extracts the center point requirement from the drawing process. Instead of requiring access to the center, the parallel compass uses two guide wheels that roll along the surface, with the marking point maintaining a constant offset distance from the path defined by the wheels. This eliminates the need for center access and external framework control.
4Adaptability or versatility
If conventional compasses are used, then fixed radius drawing is achieved, but varying radius at any instant requires complex external framework control
Solution Approach 1:
The invention makes the offset distance dynamic rather than fixed. The offset distance between the guide wheels' path and the marking point can be adjusted during operation, enabling variable radius drawing without complex external framework control. The rigid chassis maintains parallelism while allowing offset adjustment.
Data Source
AI summary
The embodiments herein disclose a compass device for drawing arcs and circles without the need for accessing the center. The device comprises a chassis fixed with two guide wheels at two ends. A protractor is fixed to the guide wheel for setting an angle for the wheel. An offset wheel is installed under the offset axis frame mounted with a tool holder and arranged perpendicular to the chassis. 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 for maintaining a stability of the compass. A marker is inserted in a tool holder for marking the arcs and circles. The device is configured to vary an angle of the angled wheel continuously to change a curvature of radius at every instant in a curve.