Mechanical LPG Cylinder Weighing With Vertical Dial Visibility
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Solution Overview
Problem
Existing mechanical scales for measuring remaining LPG in portable cylinders are obstructed by cylinder diameter, and varying tare weights complicate accurate weight measurements, lacking a universally satisfactory solution.
Innovation Solution
A modified mechanical analog bathroom scale with a 'Net Weight' load centering mechanism, a new dial disk, and a fixed metal support platform, allowing clear visibility of the dial and accommodating varying cylinder sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical scale is used to measure remaining LPG in portable cylinders, then measurement accuracy is improved, but the dial becomes obstructed by the cylinder diameter making it invisible
Solution Approach 1:
The patent repositions the dial from a horizontal plane (obstructed by the cylinder) to a vertical plane above the cylinder opening. This dimensional change allows the dial to be viewed from above without being blocked by the cylinder body, resolving the visibility issue while maintaining mechanical measurement accuracy.
Solution Approach 2:
The patent separates the dial display function from the weighing platform, placing the dial on a vertical rod above the cylinder rather than integrating it into the horizontal weighing mechanism. This segmentation allows independent optimization of both the measurement mechanism and the display visibility.
2Duration of action of moving object
If a mechanical scale is used to measure remaining LPG, then continuous measurement capability is improved, but varying tare weights of different cylinders complicate accurate measurements
Solution Approach 1:
The patent incorporates a zero-adjustment mechanism that allows the user to perform preliminary calibration by setting the dial to zero before placing the cylinder on the scale. This preliminary action compensates for varying tare weights of different cylinders, enabling accurate continuous measurements regardless of cylinder variations.
3Quantity of substance
If the cylinder diameter is increased for portable LPG storage, then gas capacity is improved, but the dial visibility is obstructed
Solution Approach 1:
By moving the dial to a vertical dimension above the cylinder opening, the patent eliminates the obstruction problem caused by increased cylinder diameter. The dial is now positioned in a different spatial dimension where it cannot be blocked by the cylinder body, allowing larger cylinders to be used without compromising visibility.
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
Enables accurate and visible measurement of remaining LPG in portable cylinders, ensuring the dial remains unobstructed and adaptable to different cylinder diameters and weights.
Implementation Method 1
The utility model is based on the concept of a spring scale... replacement of... a spring
Data Source
AI summary
A mechanical device for weighing and displaying the residual gas in portable Liquid petroleum gas (LPG) cylinders including introducing a load centering device “Net Weight”; a weighing platform that includes an upper platform with a metal support for the lower ring of the LPG cylinder, a dial disk with a “Net Weight” load scale, and a spring with a coil spring, in replacement of certain elements of a mechanical analog bath scale.