Mechanical Bypass Switch for Backplane Signal Continuity
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Solution Overview
Problem
Existing network systems face disruptions when function modules are attached or removed from backplanes, leading to signal path breaks, particularly in industrial control networks, as they rely on electrical control signals to manage bypass switches, which may not ensure continuous connectivity across different network topologies and signal path configurations.
Innovation Solution
A mechanical bypass switch assembly that automatically closes the bypass switch when a function module is removed and opens it when attached, using a normally open circuit with a mechanically movable contact that operates independently of electrical control signals, ensuring continuous signal path connectivity across various network topologies and signal path configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical control signals are used to manage bypass switches, then the system can control signal path routing, but the signal path continuity is disrupted when function modules are attached or removed
Solution Approach 1:
The patent replaces electrical control signals with a mechanical bypass switch assembly that automatically opens or closes based on the physical presence or absence of function modules. The mechanical switch is actuated by the insertion/removal of modules themselves, eliminating the need for electrical control circuits while ensuring continuous signal path routing through the bypass capability.
Solution Approach 2:
The bypass switch assembly is self-actuating through mechanical means. When function modules are inserted or removed, the mechanical structure automatically triggers the bypass switch to open or close without requiring external electrical control signals. The system serves itself by using the physical act of module installation/removal to control the bypass state.
2Reliability
If a function module is removed from the backplane, then the signal path breaks, but maintaining signal continuity requires additional mechanical components
Solution Approach 1:
The patent combines the bypass switch, actuator, and contact elements into a single integrated mechanical bypass switch assembly that is built into the backplane structure. This merged design provides signal continuity functionality without requiring separate distributed components, as the entire bypass mechanism is consolidated into one assembly per electrical connector location.
Solution Approach 2:
The mechanical bypass switch assembly acts as an intermediary element between the function module electrical connector and the signal path. When modules are removed, the bypass switch provides an alternative mechanical/electrical pathway that mediates the signal flow around the disconnected module location, maintaining continuity without requiring complex reconfiguration of other system components.
3Ease of operation
If electrical control signals are used to manage bypass switches, then remote control capability is achieved, but response time increases due to signal processing delays
Solution Approach 1:
The patent replaces electrical control signals with direct mechanical actuation. The physical insertion or removal of function modules mechanically triggers the bypass switch to open or close instantly through direct mechanical coupling. This eliminates signal processing delays associated with electrical control circuits, as the bypass state changes immediately in response to the physical presence or absence of modules.
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 mechanical bypass switch assembly maintains uninterrupted network signal paths by automatically adjusting to the presence or absence of function modules, ensuring reliable data transmission and adaptability to different network configurations without relying on electrical control signals.
Implementation Method 1
The electrical contact being out of contact with the bypass signal circuit is mechanically moved into contact with the bypass signal circuit in response to the function module being detached from the function module electrical connector
Implementation Method 2
The electrical contact being in contact with the bypass signal circuit is mechanically moved out of contact with the bypass electrical circuit in response to the function module being attached to the function module electrical connector
Data Source
AI summary
A method for maintaining continuity of a network signal path extending along a backplane includes providing a bypass signal circuit compatible with the network signal path and being electrically connected in series with the first and second portions of the network signal path. The bypass signal circuit includes a normally open circuit portion and an electrical contact movable with respect to the bypass signal circuit. An electrical contact is mechanically moved out of contact with the bypass signal circuit and moved mechanically into contact with the bypass signal circuit in response to the function module being detached from or attached to the function module electrical connector and not in response to an electrical control signal.