Trombone Twin Valve Attachment for Reduced Airflow Resistance
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Solution Overview
Problem
Traditional F-attachment valves on trombones introduce significant resistance and alter the instrument's sound, making it less responsive and 'stuffy' when engaged, while not maintaining the natural sound and response of the instrument when not in use.
Innovation Solution
A twin-valve attachment system with two rotary valves connected via an actuator, allowing for minimal air pathway deflection and rotation of approximately 120 degrees, maintaining a full bore and reducing sharp bends, enabling seamless transition between B-Flat and F note configurations without compromising the instrument's natural sound and response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional single rotary valve is used to add tubing length, then the range of the instrument is extended, but the sound becomes stuffier and less responsive with significant resistance
Solution Approach 1:
The single rotary valve is divided into two separate rotary valves. Each valve handles a specific airflow path, allowing independent optimization of each valve's function. This segmentation reduces the complexity of airflow management within each valve, minimizing turbulence and resistance while maintaining the ability to extend the instrument's range through coordinated operation of both valves.
Solution Approach 2:
The patent introduces a second rotational dimension by using two rotary valves instead of one. This allows for more sophisticated control of airflow paths, enabling the system to achieve the same range extension function while maintaining better airflow characteristics and reducing the stuffy sound quality associated with traditional single-valve designs.
2Adaptability or versatility
If a valve is engaged to add tubing length, then alternate positions and range are extended, but the natural sound and response of the instrument are altered
Solution Approach 1:
By segmenting the valve function into two separate rotary valves, each valve can be optimized to create smoother, more natural transitions in airflow. This reduces the disruption to the instrument's natural acoustic properties while still enabling alternate positions and extended range when needed.
Solution Approach 2:
The patent changes the operational parameters of the valve system by using two valves with specific rotation angles (approximately 120 degrees each) and curved ports. These parameter changes allow for more gradual and natural airflow transitions, preserving the instrument's characteristic sound and response even when the valve is engaged.
3Adaptability or versatility
If a rotary valve is used to direct airflow, then tubing length is added, but sharp bends are introduced causing resistance and sound degradation
Solution Approach 1:
The patent explicitly uses curved ports in both rotary valves instead of sharp angular bends. This curvature allows airflow to transition smoothly through the valve mechanism, reducing turbulence and resistance. The curved design maintains the ability to redirect airflow effectively while eliminating the harmful sharp bends that cause sound degradation in traditional valve designs.
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 twin-valve attachment preserves the natural sound and responsiveness of the trombone, providing a smooth and open air flow both with and without the valve engaged, enhancing the instrument's playability and extending its range without significant resistance or sound alteration.
Implementation Method 1
a first curved port in the first valve and a second curved port in the second valve may be utilized to direct air flow with minimal deflection when the valves are engaged
Data Source
AI summary
Described is a twin valve attachment for musical instruments, such as a trombone. The attachment includes a lever that is rotatable between a B-Flat configuration and an F note configuration. Also included are first and second rotary valves. The first rotary valve is operably connected with the F lever, while the second rotary valve is operably connected with the first rotary valve. F-attachment piping is fluidly connected with both the first and second rotary valves. Thus, a user may rotate the F lever to selectively direct air flow through the F-attachment piping (for the F note configuration) or bypass the F-attachment piping (for the B-Flat configuration).