Bi-Stable Tracer Wire Ground Isolation Switch Assembly
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Solution Overview
Problem
Existing devices for bonding and isolating tracer wires from electrical ground lack an efficient mechanism to switch between ground and isolation positions, making it difficult to apply electrical current to tracer wires for locating underground non-conductive objects.
Innovation Solution
The development of a wiring device assembly that can be switched between a ground position and an isolation position, featuring a conductive plate and terminal contact assemblies, allowing tracer wires to be either bonded to or isolated from electrical ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tracer wires are bonded to ground wire for electrical connection, then electrical current can be passed through tracer wires, but tracer wires cannot be isolated from ground when electrical current needs to be applied for locating underground objects
Solution Approach 1:
The patent applies the dynamics principle by making the bonding mechanism movable rather than fixed. The conductive plate can be moved between a first position (bonding tracer wires to ground) and a second position (isolating tracer wires from ground). This dynamic capability allows the same structure to serve multiple functions - both bonding and isolating - without requiring separate complex mechanisms for each state.
Solution Approach 2:
The conductive plate serves multiple functions: it acts as both a bonding element (when in the first position) and an isolation element (when in the second position). This multi-functionality resolves the technical contradiction by allowing a single structure to provide both grounding and isolation capabilities, eliminating the need for separate dedicated mechanisms for each function.
2Adaptability or versatility
If a switching mechanism is added to enable ground and isolation positions, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent merges the bonding function and isolation function into a single integrated structure - the conductive plate. Rather than adding a separate switching mechanism with multiple components, the plate itself performs both functions by changing position. This merging approach achieves bi-stable capability while minimizing the increase in device complexity.
Solution Approach 2:
The conductive plate is configured to automatically provide both bonding and isolation functions based on its position. When moved to the first position, it inherently bonds the tracer wires to ground; when moved to the second position, it inherently isolates them. The structure serves itself by using its own positional state to determine its function, eliminating the need for additional control mechanisms.
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 efficient bi-stable switching of tracer wires, allowing for concurrent connection or isolation from ground wires, facilitating the application of electrical current to locate underground non-conductive objects without disturbing the soil.
Implementation Method 1
the electrically conductive plate is electrically connected to each terminal contact assembly when in the ground (or normal) position, and the electrically conductive plate is electrically isolated from each terminal contact assembly when in the isolation position
Data Source
AI summary
A device assembly capable of selectively bonding one or more tracer wires to ground and isolating the one or more tracer wires from ground is provided. The device assembly includes a housing, an electrical switch within the housing and one or more contact assemblies. The one or more tracer wires and ground wire are connected to the one or more contact assemblies. The electrical switch can connect the tracer wires to the ground wire and can isolate the tracer wires from the ground wire.