Spirit Level Bubble Vial Coloring for Visibility
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Solution Overview
Problem
Craftsmen often face difficulties in accurately determining the precise location of a bubble in leveling instruments due to limited visibility of the bubble relative to its reference markings, despite various prior attempts to enhance readability.
Innovation Solution
The use of coloring agents on the far side of the bubble vial, strategically positioned in the upper half of the rear upper quadrant, provides improved visibility through internal reflection and refraction, enhancing the bubble's visibility along multiple lines of sight by forming a contiguous colored region with the bubble surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transparent acrylic bubble vial is used, then the bubble can be observed through the vial walls, but the bubble visibility and contrast against the background remains insufficient for accurate location determination
Solution Approach 1:
The patent applies color contrast principles by providing the bubble vial with a white or light-colored background that contrasts with the dark bubble outline and reference markings. This color differentiation enhances the visibility of the bubble's position against the background, allowing craftsmen to accurately determine bubble location even when the bubble itself has limited visual contrast.
Solution Approach 2:
The patent adds a background dimension behind the bubble vial that provides visual reference. By introducing this additional visual layer with contrasting colors and reference markings, the system enhances bubble location determination without modifying the bubble or vial structure themselves, effectively adding a new dimension to the visual indication system.
2Measurement precision
If reference markings are provided on the bubble vial, then bubble position can be measured, but the markings themselves may reduce contrast and make bubble location harder to determine
Solution Approach 1:
The patent applies local quality by providing reference markings only in specific areas where they are most useful for measurement, while maintaining high contrast in other areas. The markings are strategically positioned on the background rather than on the bubble vial itself, allowing localized measurement functionality without compromising overall visual contrast and bubble visibility.
Solution Approach 2:
The patent introduces a background as an intermediary element that carries the reference markings. This mediator separates the measurement function from the bubble display function, allowing reference markings to be provided without directly reducing the contrast of the bubble itself. The background acts as a carrier that provides both visual contrast and measurement reference simultaneously.
3Illumination intensity
If multiple prior art solutions are combined, then bubble visibility is enhanced through various methods, but the device complexity and manufacturing difficulty increases
Solution Approach 1:
The patent merges multiple functions into a single background element that provides both visual contrast enhancement and reference markings. By combining the background, reference markings, and contrast enhancement into one integrated component, the design avoids the complexity of multiple separate elements while achieving enhanced bubble visibility and measurement capability.
Solution Approach 2:
The background serves multiple functions simultaneously - it provides visual contrast, carries reference markings, and enhances overall bubble visibility. This self-service approach allows a single element to perform multiple roles that would otherwise require separate components, reducing device complexity while maintaining enhanced performance.
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
This solution significantly improves bubble visibility and accuracy for users, allowing them to more readily determine the bubble's location relative to reference markings, thereby enhancing leveling precision.
Implementation Method 1
provides improved visibility through internal reflection and refraction
Implementation Method 2
provides improved visibility through internal reflection and refraction
Data Source
Figure 1
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Figure 5~6
AI summary
Spirit levels including a horizontal bubble vial with improved bubble visibility for assisting user readability for leveling purposes. The improved bubble visibility is achieved by coloring a bubble's uppermost surface as perceived by a user.