Tension Equalizer

A device, comprising:

• first, second, and third externally threaded pins each threaded through a corresponding first, second, and third internally threaded receiver, each pin configured to receive a pair of tensile strands at locations spaced apart from one another along the pin on opposite sides of the receiver;
• a fourth externally threaded pin threaded through a corresponding internally threaded fourth receiver;
• a first link linking the first receiver to the fourth pin at a location on one side of the fourth receiver, the first receiver pivotally connected to the first link;
• a second link linking the second receiver to the fourth pin at a location on the other side of the fourth receiver opposite the first link, the second receiver pivotally connected to the second link;
• a fifth externally threaded pin threaded through a fifth internally threaded receiver;
• a third link linking the fourth receiver to the fifth pin at a location on one side of the fifth receiver, the fourth receiver pivotally connected to the third link;
• and
• a fourth link linking the third receiver to the fifth pin at a location on the other side of the fifth receiver opposite the third link, the third receiver pivotally connected to the fourth link;
• and wherein
• each of the first, second, and third pins and the corresponding first, second, and third receivers are movable with respect to one another by turning the pin to vary distances between the receiver and the tensile strand receiving locations, the fourth pin and the fourth receiver are movable with respect to one another by turning the fourth pin to vary distances between the fourth receiver and the first and second links, and the fifth pin and the fifth receiver are movable with respect to one another by turning the fifth pin receiver to vary distances between the fifth receiver and the third and fourth links.

A device, comprising:

• a plurality of tensile strands stretched between a first anchor and a second anchor, the first anchor and the second anchor being stationary with respect to one another;
• first, second, and third paired-strand levers, a pair of the tensile strands attached to each of the paired-strand levers at locations spaced apart from one another along the paired-strand lever;
• first, second, and third fulcrums each supporting a corresponding one of the paired-strand levers at a location between the tensile strands;
• a fourth lever linked in tension to the first and second paired-strand levers through the first and second fulcrums, respectively, at secondary lever link locations spaced apart from one another along the fourth lever;
• a fourth fulcrum supporting the fourth lever between the secondary lever link locations;
• a fifth lever linked in tension to the third paired-string lever and the fourth lever through the third and fourth fulcrums, respectively, at primary lever link locations spaced apart from one another along the fifth lever;
• a fifth fulcrum supporting the fifth lever between the primary lever link locations;
• and
• the second anchor anchoring the fifth lever in tension through an adjustable link to the fifth fulcrum such that a distance between the second anchor and the fifth lever may be varied.

A guitar, comprising:

• a body;
• a headstock;
• a neck extending from the body to the headstock;
• first, second, third, fourth, fifth and sixth strings lying sequentially next to one another across the neck and extending between the body and the headstock, one end of each string anchored to the headstock and the other end of each string anchored to the body through a tension equalizer;
• and
• the tension equalizer comprising:
• first, second, and third paired-string levers, the first and third strings attached to the first paired-string lever, the fourth and sixth strings attached to the second paired-string lever, and the second and fifth strings attached to the third paired-string lever;
• first, second, and third fulcrums each supporting a corresponding one of the paired-strand levers at a location between the strings attached to each lever;
• a fourth lever linked in tension to the first and second paired-string levers through the first and second fulcrums, respectively, at secondary lever link locations spaced apart from one another along the fourth lever;
• a fourth fulcrum supporting the fourth lever between the secondary lever link locations;
• a fifth lever linked in tension to the third paired-string lever and the fourth lever through the third and fourth fulcrums, respectively, at primary lever link locations spaced apart from one another along the fifth lever;
• a fifth fulcrum supporting the fifth lever between the primary lever link locations;
• and
• the fifth lever anchored in tension to the body through an adjustable link to the fifth fulcrum such that a distance between the body and the fifth lever may be varied to vary the tension in the strings.