Mechanical Temperature Indicator for Electrical Overload Thresholds
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Solution Overview
Problem
There is a need for apparatus capable of sensing and providing a visual indication of temperature changes within electrical equipment to determine if it is operating in an 'over-loaded' or 'extremely over-loaded' state, as elevated temperatures can reduce the lifespan of electrical equipment.
Innovation Solution
A temperature sensor with a heat-sensitive element that changes configuration at a predetermined temperature, coupled with a biased member and an indicator, which provides a visual indication when the temperature exceeds the predetermined threshold, allowing for easy assessment of the equipment's operational state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor with a heat-sensitive element and biased member is used to sense temperature changes, then temperature detection capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex electronic temperature sensing systems with a simple mechanical heat-sensitive element that changes configuration at predetermined temperatures. The biased member mechanically responds to the heat-sensitive element's configuration change, eliminating the need for electronic components while achieving reliable temperature detection above thresholds.
Solution Approach 2:
The heat-sensitive element automatically changes configuration when exposed to temperatures above the predetermined threshold, and the biased member self-actuates in response to this change. The indicator mechanism is passively driven by the mechanical movement, requiring no external power source or control system, thus simplifying the overall device.
2Ease of operation
If a visual indication mechanism is added to the temperature sensor, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent employs an indicator that provides visual feedback through color change or position indication when the biased member is actuated by temperature threshold exceedance. This allows operators to quickly assess equipment thermal state without requiring technical expertise or additional measurement instruments.
Solution Approach 2:
The indicator mechanism is integrated with the temperature sensing mechanism, sharing the same housing and mechanical actuation path. The biased member that responds to temperature changes also directly actuates the indicator, combining two functions into a single unified device rather than separate components.
3Measurement precision
If multiple temperature thresholds are monitored, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the temperature monitoring function into multiple independent heat-sensitive elements, each calibrated to respond at different predetermined temperature thresholds. Each element can independently actuate its own biased member and indicator, allowing simultaneous monitoring of multiple temperature levels without requiring a single complex sensing system.
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
The solution effectively senses temperature increases above predetermined thresholds, providing a clear visual indication that helps in assessing whether electrical equipment is overloaded, thereby aiding in timely maintenance and extending equipment lifespan.
Implementation Method 1
the heat-sensitive element is a material having a melting temperature corresponding to the predetermined temperature and the change in configuration is a phase change from a solid state to a liquid state
Implementation Method 2
the chamber has a portion that is formed from a selectively permeable element to retain the heat-sensitive element within the chamber when the heat-sensitive element is in a solid state, but to allow the heat-sensitive element to exit the chamber when the heat-sensitive element is in a liquid state
Data Source
AI summary
A temperature sensor has a heat-sensitive element contained within a chamber, the heat-sensitive element changing from a first configuration to a second configuration at a predetermined temperature, and a biased member biased towards the chamber. The biased member initially is prevented from entering the chamber when the heat-sensitive element is in the first configuration and enters the chamber when the heat-sensitive element is in the second configuration. In some aspects, the first configuration is solid and the second configuration is liquid and a selectively permeable element is provided to allow the heat-sensitive element to exit the chamber in the liquid configuration. An indicator can be provided that has a plurality of feet initially held in a retained configuration by the biased member until the biased member enters the chamber to release the feet for sliding motion of the indicator.