Segmented Vibrato Bar for Uniform Multi-String Pitch Control
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Solution Overview
Problem
Existing vibrato mechanisms on string instruments fail to uniformly adjust the pitch of multiple strings due to differences in string tension and elasticity, leading to discordant chords and unreliable performance.
Innovation Solution
A vibrato mechanism with a bar comprising segments of varying sizes to match the properties of individual strings, and a stop mechanism to prevent unintended string movement, ensuring uniform pitch adjustment and stable tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single vibrato bar is used for all strings, then the device complexity is reduced, but the manufacturing precision and performance uniformity across strings with different tensions deteriorate
Solution Approach 1:
The vibrato bar is divided into multiple segments (first vibrato bar segment, second vibrato bar segment, etc.), with each segment having different physical properties (mass, length, material composition) tailored to specific string tensions. This segmentation allows each segment to be optimized for its intended string while maintaining a unified vibrato mechanism structure.
Solution Approach 2:
Different portions of the vibrato bar have different properties - the first segment is designed with specific mass and length for high-tension strings, while the second segment has different properties for low-tension strings. This local differentiation of properties enables precise intonation control for each string type without requiring completely separate mechanisms.
2Manufacturing precision
If separate vibrato bars are used for different string tensions, then the intonation accuracy is improved, but the device complexity and number of components increase
Solution Approach 1:
Multiple vibrato bar segments designed for different string tensions are merged into a single integrated vibrato bar assembly. The segments are connected in sequence along the vibrato bar, allowing the mechanism to handle multiple string types simultaneously while maintaining a unified structure that can be operated by a single actuator.
Solution Approach 2:
The segmented vibrato bar design enables a single vibrato mechanism to serve multiple functions - it can provide appropriate intonation control for both high-tension strings and low-tension strings, as well as accommodate different string types (steel, nylon, fluorocarbon) within a single unified system.
3Manufacturing precision
If the vibrato bar segments have different masses, then the intonation accuracy for different string tensions is improved, but the manufacturing complexity increases
Solution Approach 1:
The vibrato bar is segmented into distinct sections that can be manufactured separately with optimized mass properties for specific string tensions, then assembled into the final configuration. This allows each segment to be precisely engineered for its intended purpose while simplifying the overall manufacturing process through modular construction.
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
Uniform pitch adjustment across strings, improved sound quality, and enhanced reliability by accounting for string properties and preventing unintended tension changes.
Implementation Method 1
an actuator arm that is operatively connected to the bar such that the actuator arm, when engaged, causes the bar to rotate about its longitudinal axis
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A vibrato mechanism for a string instrument. Embodiments include a bar with a plurality of segments, each respective segment of the plurality of segments being configured to connect to a respective string of a plurality of strings of a string instrument. In some embodiments, a first segment of the plurality of segments has a first size and is configured to connect to a first string of the plurality of strings having a first tension, and a second segment of the plurality of segments has a second size that is different than the first size and is configured to connect to a second string of the plurality of strings having a second tension that is different than the first tension. Embodiments include an actuator arm that is operatively connected to the bar such that the actuator arm, when engaged, causes the bar to rotate about its longitudinal axis.