String tensioner for stringed instrument
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United States of America Patent
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Oct 17, 2017
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app pub date -
Jan 22, 2016
filing date -
Jan 22, 2015
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Abstract
A string tensioner module for a stringed musical instrument is configured to apply a constant or near-constant tension to the musical strings of the instrument. The module is divided into a plurality of string tensioners, one string tensioner for each musical string. Each string tensioner employs a primary spring that apply the primary force coaxial with the string. Each string tensioner also employs a secondary spring that applies a secondary force in a direction crossing the axis of the string, and thus applying an axial force component that changes as the angle of the secondary spring changes. The primary and secondary springs are selected so that the change in the axial force component of the secondary spring as the string changes in length approximates the change in force applied by the primary spring so that the axial force applied to the string remains generally constant even as the string changes in length.
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