Supplemental Compensating Saddle for Classical Guitar Intonation
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Solution Overview
Problem
Classical guitars suffer from tuning issues due to the fixed saddle, which fails to maintain perfect pitch along the neck as the tension and pitch of strings change with fretting, leading to intonation problems.
Innovation Solution
A supplemental compensating saddle system with a mounting bracket, node assemblies, and adjustable securing mechanisms is introduced, allowing each string to be individually adjusted to maintain optimal pitch without modifying the guitar's soundboard or bridge, using a U-shaped bracket with node assemblies that can move parallel to the strings to compensate for intonation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed saddle is used on a classical guitar, then the structure remains simple and lightweight, but the instrument suffers from intonation problems as tension and pitch change with fretting
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed saddle into a movable saddle that can adjust its position along the bridge. The saddle is mounted on a rod that allows it to move forward and backward to compensate for tension changes when strings are fretted, thereby maintaining accurate intonation across the instrument's range without requiring a complex adjustable mechanism
Solution Approach 2:
The patent applies parameter changes by allowing the saddle position to vary dynamically based on string tension and pitch requirements. As strings are fretted and tension increases, the saddle automatically shifts position to maintain correct intonation, changing the critical parameter of saddle location in response to playing conditions
2Reliability
If an adjustable bridge mechanism is added to a classical guitar, then intonation can be maintained, but the extra weight and modifications adversely impact sound production and aesthetics
Solution Approach 1:
The patent applies segmentation by separating the adjustment function from the entire bridge structure. Only the saddle portion is made movable and adjustable, while the rest of the bridge remains fixed and lightweight. This segmented approach provides intonation correction capability without adding the weight and complexity of a fully adjustable bridge mechanism
Solution Approach 2:
The patent extracts the essential adjustment function from a complex bridge mechanism and isolates it to just the saddle component. By taking out only the necessary element (the movable saddle) and removing unnecessary bridge complexity, the solution achieves intonation accuracy while minimizing added weight and preserving the acoustic properties of the original bridge
3Reliability
If the sound board or bridge is modified to attach an adjustable mechanism, then intonation can be corrected, but the sound and aesthetics of the instrument are negatively impacted
Solution Approach 1:
The patent uses an intermediary approach by introducing a rod mechanism that connects the saddle to the bridge without requiring direct modification of the sound board or bridge structure. The rod acts as an intermediary element that enables saddle movement while preserving the integrity and appearance of the original guitar components
Solution Approach 2:
The patent applies local quality by making only the saddle area adjustable while keeping the rest of the bridge and sound board unchanged. This localized adjustment preserves the aesthetic appearance and structural integrity of the overall instrument, affecting only the specific region where intonation correction is needed
Data Source
AI summary
An article of manufacture for providing a supplemental compensating saddle used with a classical guitar having a head, a neck, a sound board, a bridge, a saddle, and a set of strings running from the head to the bridge. The supplemental compensating saddle includes a mounting bracket having a higher rear vertical member and a lower front vertical member coupled together, the mounting bracket being mounted behind the bridge, a set of node assemblies coupled to the higher rear vertical member and extending across the bridge and under the set of strings, each of the node assemblies supporting a corresponding string within the set of strings, and a set of adjustable securing mechanisms coupling each of the node assemblies to the higher rear member of the mounting bracket, each adjustable securing mechanism enables each corresponding node assembly to move parallel to a path of the corresponding string within the set of strings.