Stringed Instrument Torque Balancing Bridge

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Solution Overview

Problem

Current stringed instrument designs face challenges in managing string tension, which can lead to structural instability and negative impacts on sonic transfer and sound projection, as existing solutions either compromise sonic properties for structural stability or fail to efficiently distribute torque across the soundboard.

Innovation Solution

A bridge and string anchor point system within the soundboard that applies counter-rotational torque to balance forward-rotational torque, allowing full string tension to drive vibrations while maintaining structural stability and optimizing tonal properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If substantial bracing is added to maintain structural stability against string tension torque, then structural stability is improved, but the bracing negatively impacts vibrations of the soundboard

Engineering Contradiction:
Improvestructural stabilityVSAvoidnegative impact on vibrations
Core Design Contradiction:
Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The patent extracts the torque-balancing function from the bracing system and relocates it to a dedicated counterbalancing mechanism attached to the instrument's body. This separates the structural support function from the vibration transmission function, allowing the soundboard to vibrate freely while torque is balanced by the separate mechanism.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary counterbalancing mechanism that acts as a mediator between the string tension and the instrument body. This mechanism applies opposing torque to balance the string tension's rotational effect without directly interfering with the soundboard's vibration, thus resolving the conflict between structural stability and vibration quality.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Force

If strings are attached to penetrate the soundboard and attach underneath, then downward pressure on the top is reduced, but torque is converted that requires substantial bracing

Engineering Contradiction:
Improvedownward pressureVSAvoidstructural stability
Core Design Contradiction:
ForceVSStability of the object's composition

Solution Approach 1:

The patent introduces an intermediary counterbalancing mechanism that applies opposing torque to balance the rotational force generated by string attachment. This mediator allows the soundboard to experience reduced downward pressure while the intermediary mechanism handles the torque balancing, preventing structural instability.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent applies the principle of counterweight by implementing a mechanism that generates opposing torque to balance the rotational force from string attachment. This counter-torque acts as a mechanical counterweight that neutralizes the destabilizing effect of the穿透式 string attachment on the soundboard.

Inventive Principle:
Principle #8Anti-weight (Counterweight)

3Ease of manufacture

If traditional string anchors are used, then simple attachment is achieved, but no torque redistribution occurs and aging instruments bulge from inherent torque

Engineering Contradiction:
Improveattachment simplicityVSAvoidstructural stability
Core Design Contradiction:
Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent transitions from static string anchoring to a dynamic torque-balancing system. The counterbalancing mechanism can actively adjust and respond to torque variations, allowing the system to maintain equilibrium under different playing conditions while preserving attachment simplicity through standardized interfaces.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent applies preliminary anti-action by pre-configuring a counterbalancing mechanism that proactively opposes torque before it can cause structural damage. This preventive approach counters the inherent torque from string attachment before it accumulates and causes bulging in aging instruments, while maintaining ease of manufacture through modular design.

Inventive Principle:
Principle #9Preliminary anti-action

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

This design enables efficient generation of amplitude across a full frequency spectrum, providing an optimal balance between structural stability and tonal properties, and can produce a self-equalizing vibrato unit that neutralizes torque variations, ensuring consistent pitch changes only through intentional movement.

Implementation Method 1

A bridge and string anchor point system within the soundboard that applies counter-rotational torque to balance forward-rotational torque

Methodology Applied
Scientific EffectTorque: Torque

Data Source

PatentUS10013957B2Tension redistributing and balancing system for stringed instruments
Publication Date: 2018.07.03 EL KISS AVI
  • US10013957B2 patent drawing
  • US10013957B2 patent drawing

AI summary

A tension redistributing and balancing system for stringed instruments, consisting of bridge and string coupling mechanism which utilizes the very same string tension required to reach the desired pitch to apply inverted torque which counteracts the very same tension and torque forces as they relate to the bridge and/or soundboard.