Aircraft Switch Flip Guard With Opposing Gate Action
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Solution Overview
Problem
Inadvertent actuation of aircraft switches, particularly emergency switches, can lead to unsafe flight conditions due to unintended lifting of flip guards, which compromises the dual action requirement for safe operation.
Innovation Solution
A flip guard safety system with a cover that pivots between guarded and unguarded positions, and a gate that requires dual opposing operations to access the switch, ensuring the cover remains in the guarded position unless intentionally actuated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flip guard is used to protect the aircraft switch, then the switch is protected against inadvertent actuation, but the flip guard may be unintentionally lifted exposing the switch to inadvertent actuation
Solution Approach 1:
The patent implements a nested protection system where a gate structure is positioned within the flip guard assembly. The gate acts as an inner protective element that must be opened before the flip guard cover can be lifted, creating a nested dual-action mechanism that prevents unintended activation while maintaining reliable protection
2Ease of operation
If a flip guard cover is made movable to provide access to the switch, then the switch becomes accessible for intentional operation, but the cover may be accidentally lifted due to its movable nature
Solution Approach 1:
The gate structure implements preliminary anti-action by requiring intentional opening of the gate before the flip guard cover can be lifted. This preliminary action prevents accidental activation by ensuring that the protective cover cannot be removed unless the gate is first deliberately opened, thus counteracting the potential harmful effect of the movable cover design
3Reliability
If dual opposing operation is required to access the switch, then inadvertent actuation is prevented, but the operation complexity increases
Solution Approach 1:
The patent merges the gate structure with the flip guard assembly into an integrated unit. The gate is positioned within the flip guard housing and shares common mounting points and structural elements, reducing overall device complexity while maintaining the dual-action protection mechanism. This merging approach allows the complex dual opposing operation to be achieved without proportionally increasing the overall device complexity
Data Source
AI summary
A flip guard safety system for preventing inadvertent actuation of an aircraft switch. The flip guard safety system includes a flip guard having a cover that pivots between a guarded positions in which the cover protects the aircraft switch against inadvertent actuation and an unguarded position in which the cover provides access to the aircraft switch. A flip guard safety has a gate that pivots between a closed position in which the gate retains the cover in the guarded position and an open position in which the gate does not retain the cover in the guarded position, such that the cover is pivotable from the guarded position to the unguarded position. The gate pivots from the closed position to the open position in a first direction and the cover pivots from the guarded position to the unguarded position a second direction that is opposite of the first direction.