REPETITION SPRING ASSEMBLY FOR AN UPRIGHT PIANO
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Aug 4, 2022
filing date -
Aug 4, 2022
priority date (Note) -
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Abstract
A hammer return spring rail (10) for an upright piano including: at least one cavity (15) for receiving at least one rod (20): and a plurality of open compartments (25) each configured to receive a hammer return spring (30). each spring (30) including a coil (35). and each compartment (25) allowing the hammer return spring (30) to extend outward therefrom in a generally downward direction: each compartment (25) including a slot (45) for receiving an extension (40) of each hammer return spring (30); and each compartment including an aperture (50) for receiving an adjusting means (55) such that, by adjusting the degree to which the adjusting means (55) are inserted into the aperture (50). pressure applied to the extension (40) of the spring (30) can be increased or decreased. thereby causing an increase or decrease of the force exerted by the spring (30) on a corresponding hammer butt (60).
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