Elastomeric Finger Strip for Guitar Barre Chords
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Solution Overview
Problem
Guitar players face difficulty in performing barre chords due to varying string spacing and tension, which requires significant mechanical force, especially on nylon-stringed and steel-string acoustic guitars, leading to effort-intensive finger pressure and potential dampening of strings.
Innovation Solution
A resilient strip attached to the index finger, with strategically placed shape-memory creases and shims, concentrates force on guitar strings near the fret for ideal contact, reducing effort required for barre chords without interfering with finger movement for individual notes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If higher tension strings are used to achieve sufficient acoustic volume, then the volume is improved, but the mechanical force required to perform a six-string barre increases significantly
Solution Approach 1:
The patent introduces a mechanical device that acts as an intermediary between the player's finger and the guitar strings. This device includes a padded surface that distributes pressure and a lever arm mechanism that amplifies the player's input force, allowing high-tension strings to be barred without requiring excessive finger strength.
Solution Approach 2:
The invention adds a spatial dimension to the barre technique by introducing a lever arm that extends perpendicular to the finger. This lever arm provides mechanical advantage, transforming the player's limited finger force into sufficient pressing force on high-tension strings through rotational mechanics.
2Ease of operation
If wider string spacing is used on nylon classical guitars, then the comfort for individual note playing is improved, but the effort required to barre all six strings increases
Solution Approach 1:
The device features a padded surface with varying local properties - softer materials where flesh contact occurs and harder materials where string contact occurs. The padding is strategically positioned to distribute pressure across the wide string spacing of classical guitars, reducing the effort needed to press all strings against the fret.
3Device complexity
If bare finger is used to barre, then no additional device is required, but flesh of the finger overlaps the fret and dampens vibrating strings
Solution Approach 1:
The patent introduces a padded device as an intermediary between the player's flesh and the guitar strings. This device includes a hard surface that contacts the strings while a soft padding layer contacts the player's finger, preventing flesh overlap on the fret and eliminating string dampening while maintaining comfort.
4Measurement precision
If index finger is curled to play individual notes, then single note precision is improved, but the strip becomes trapped within the finger and interferes with movement
Solution Approach 1:
The device incorporates dynamic elements including a flexible strip that can bend and a movable pad that adjusts position. When the finger curls for individual notes, these elements move accordingly, preventing the device from becoming trapped and maintaining full finger mobility while preserving barre functionality when the finger is extended.
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 barre chord device allows for reduced effort in performing six-string barre chords across different guitar types, maintaining clear tone by minimizing flesh overlap on the fret and distributing pressure evenly across all strings, facilitating effortless transitions between barre chords and single notes.
Implementation Method 1
A resilient strip attached to the index finger... concentrates force on guitar strings near the fret
Implementation Method 2
strategically placed shape-memory creases
Data Source
AI summary
A barre chord device can include a strip of rubber, elastomeric or other resilient material with heat formed creases and protruding shims. A guitar player attaches the strip at discrete places to the index finger of his fretting hand. When the guitar musician performs a barre chord, the strip concentrates barre force to the strings. Shims press into the concave mid-finger keeping the strip straight on a string side to provide uniform barre pressure. Muscular effort is minimized. Creases cause the strip to fold neatly to a thumb side when the index finger is curled to perform non-barre chords and scales.