Locking Grounding Clamp With Magnetic Safety Interlock
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Solution Overview
Problem
Conventional grounding clamps can be installed and removed by hand, potentially exposing workers to hazardous voltages, as they lack a mechanism to require the use of an insulating tool, leading to safety risks and incidents like electrocution.
Innovation Solution
A locking grounding clamp with a safety lock-out mechanism that only allows operation when coupled with an insulating tool, utilizing a combination of a ferrous member and magnet to ensure the clamp remains locked unless the tool is present, preventing manual operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional grounding clamps are designed to be manually operable, then ease of operation is improved, but worker safety deteriorates due to risk of accidental contact with hazardous voltages
Solution Approach 1:
An insulating tool acts as an intermediary between the worker and the clamp mechanism. The tool is required to actuate the release mechanism, preventing direct hand contact with the clamp while enabling operation through the insulating barrier.
Solution Approach 2:
The manual mechanical operation is replaced by a tool-actuated mechanism. The insulating tool provides the mechanical input needed to trigger the release, substituting direct hand operation with a mediated mechanical system that enforces safety protocols.
2Object-affected harmful factors
If a lock-out mechanism requiring insulating tool is added to the clamp, then worker safety is improved, but device complexity increases
Solution Approach 1:
The lock-out mechanism is merged with the clamp's existing clamping and release mechanisms. The safety interlock is integrated into the structural components rather than being a separate additive system, reducing overall complexity.
Solution Approach 2:
The clamp automatically locks and unlocks based on the presence or absence of the insulating tool. The mechanism self-regulates its state without requiring additional control systems, operators, or complex sequencing logic.
3Object-affected harmful factors
If the clamp is designed to prevent manual operation, then worker safety is improved, but ease of operation deteriorates due to requirement of insulating tool
Solution Approach 1:
The clamp is designed with preliminary anti-action by defaulting to a locked state that prevents operation. The insulating tool is required to overcome this preliminary anti-action, ensuring safety is built into the default configuration rather than requiring active safety measures.
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
Prevents accidental operation of the grounding clamp by hand, ensuring it can only be actuated or unlocked with the insulating tool, thereby enhancing worker safety in high-voltage environments by mandating the use of the tool for all operations.
Implementation Method 1
The lock-out includes a ferrous member resiliently biased into a first position and the hot-stick head includes a magnet cooperating with the ferrous member to magnetically bias the ferrous member, and thereby the lock-out, into the second position when the head is coupled with the frame.
Data Source
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AI summary
A grounding clamp includes a safety lock-out which locks the operation of the clamp in the absence of a hot-stick. A clamping member cooperates with a frame having an arm, and is selectively biasable by a user to translate the clamping member relative to the frame to clamp a conductor between the clamping member and arm. The lock-out cooperates with the clamping member to prevent the translation of the clamping member unless in the presence of an insulating tool such as a hot-stick.