Tremolo Stop Tuner for Fulcrum Bridge Stability

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Solution Overview

Problem

Fulcrum tremolo systems in stringed musical instruments face challenges in maintaining initial position and harmonic tuning stability due to string stretch and tension imbalances, especially when strings break, leading to pitch shifts and harmonic distortion.

Innovation Solution

The implementation of a Tremolo Stop Tuner and Tremolo Stabilizer mechanisms, including adjustable compression spring elements and thumbwheel arrangements, to enforce initial position and stabilize the tremolo system, allowing for 'hard' or 'soft' stops to prevent pitch changes and maintain harmonic tuning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fulcrum tremolo system is used to enable pitch variation and vibrato effects, then the instrument gains expressive capability and pitch range, but the system becomes unstable and loses initial position due to string stretch and tension imbalances

Engineering Contradiction:

Improvepitch variation capabilityVSAvoidinitial position stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary anti-action by providing a stop mechanism that preemptively prevents the tremolo system from moving away from its initial position. The stop acts as a mechanical constraint that counteracts the tendency of the system to drift due to string stretch and tension changes, thereby maintaining stability while allowing the full range of tremolo expression.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The stop is pre-positioned at the initial position of the tremolo system, establishing a reference point before any pitch variation occurs. This preliminary positioning ensures that when string tension changes occur, the system has a predetermined stable position to return to or maintain, preventing drift and maintaining harmonic tuning.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the tremolo system is allowed to float freely to maintain harmonic tuning, then tuning stability is improved, but the system cannot accommodate string breaks or tension changes without pitch shifts

Engineering Contradiction:

Improvetuning stabilityVSAvoidresponse to string breaks

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The stop mechanism serves as a cushioning element that prepares the system in advance for potential string breaks or tension changes. By providing a mechanical stop at the initial position, the system is cushioned against the harmful effects of uncontrolled drift when strings break, allowing musicians to continue playing without immediate retuning.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Stability of the object's composition

If a hard stop is used to firmly maintain initial position, then position stability is improved, but the system becomes overly rigid and cannot accommodate normal playing variations

Engineering Contradiction:

Improveinitial position enforcementVSAvoidplaying flexibility

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The stop mechanism provides localized stability only at the initial position, while allowing freedom of movement in other positions. This local quality approach ensures that the stop firmly maintains the reference position when needed, but does not constrain the natural vibrato and pitch variations that occur during normal playing, thereby preserving playing flexibility.

Inventive Principle:

Principle #3Local quality

4Measurement precision

If the second critical point on the bridge is made small to create a defined contact point, then harmonic tuning precision is improved, but the bridge structure becomes more sensitive to tension changes and less stable

Engineering Contradiction:

Improveharmonic tuning precisionVSAvoidbridge stability

Core Design Contradiction:

Measurement precisionVSStability of the object's composition

Solution Approach 1:

The stop mechanism acts as a counterbalancing element that offsets the sensitivity of the small second critical point. By providing a mechanical stop that prevents excessive movement, the system compensates for the increased sensitivity caused by the small bridge contact point, thereby maintaining both precision and stability.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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

These mechanisms effectively prevent unwanted pitch changes and maintain harmonic tuning stability, allowing musicians to continue playing without delay even if a string breaks, while providing adjustable support for strumming and pitch changes.

Implementation Method 1

The compression spring element is pre-tensioned to comprise a selected force to enforce initial position

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

frictional restraint in contact with said cam

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS9484007B1Tremolo stop tuner and tremolo stabilizer

Publication Date: 2016.11.01 MCCABE GEOFFREY LEE

AI summary

TREMOLO STOP TUNER is integrated into the spring block portion of a traditional fulcrum tremolo, and moveable therewith about the tremolo pivot axis, comprising an adjustment device to adjust the tension of the traditional tremolo springs with the capacity to stop or block the tremolo at the equilibrium point or initial position. One embodiment includes the option to configure the novel Tremolo Stop Tuner elements as either a Global Tuner or a Stop Tuner and includes an optional setscrew for improving coupling.