Mouth-Activated Switch Integrated Control Circuit for Aviation Oxygen Masks
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Solution Overview
Problem
Existing aviation life support systems lack an integrated control circuit that can be used with both respiratory and communications sub-systems, particularly for hands-free activation of night vision compatible lighting without interfering with respiratory or communications functions.
Innovation Solution
An integrated control circuit is designed to be integrated into the communication and respiratory sub-systems of an aircraft life support system, featuring a mouth-activated switch within the oxygen mask, a night vision compatible light source, and an independent power source, ensuring hands-free operation without altering the existing gasketing configuration or interfering with the respiratory or communications systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mouth-activated switch is integrated into the oxygen mask, then hands-free operation is enabled, but the risk of interfering with respiratory or communications functions increases
Solution Approach 1:
A control circuit is introduced as an intermediary between the mouth-activated switch and the light source. This control circuit processes the activation signal and selectively triggers only the night vision compatible light, preventing unintended activation of respiratory or communications systems while enabling hands-free operation.
2Illumination intensity
If night vision compatible lighting is added to the oxygen mask, then visibility is improved in dark environments, but the device complexity increases
Solution Approach 1:
The control circuit and light source are integrated into the existing oxygen mask structure, merging multiple functions (respiratory support, communication, and illumination) into a single unified device. This reduces the need for separate components and simplifies the overall system architecture.
Solution Approach 2:
The oxygen mask is designed to perform multiple functions simultaneously: providing respiratory support, enabling communication through integrated microphone and speaker, and providing night vision compatible illumination. This multi-functionality reduces the need for separate equipment and simplifies the operational workflow.
3Ease of manufacture
If the control circuit is integrated into the existing gasketing configuration, then modifications to the oxygen mask are minimized, but the ease of installation and maintenance may be reduced
Solution Approach 1:
The control circuit is designed as a modular component that can be independently installed, tested, and replaced within the oxygen mask system. This segmentation allows for easier maintenance and repair without requiring complete disassembly of the mask structure, while still integrating seamlessly with the existing gasketing configuration.
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 enables hands-free, night vision compatible lighting that is safe for use with respiratory and communications systems, providing enhanced safety and functionality for aviators without requiring modifications to the oxygen mask or existing components.
Implementation Method 1
a light emitting source mounted onto the electrical connection block for emitting light through the spectrally select filter to produce night vision compatible illumination
Implementation Method 2
a spectrally select filter mounted onto the electrical connection block behind the window
Data Source
AI summary
A safety device integrated into a respiratory system that includes an oxygen mask having a cup-shaped rigid portion overlying a face mating portion to define a respiratory envelope that is adapted to sealingly engage over the mouth and nose of a user. An integrated control circuit includes an externally mounted connection block and a circuit looping through the respiratory envelope. A hands-free, mouth-activated switch is located within the cup-shaped rigid portion and is electrically coupled to the control circuit.