Touch force adjustment means for a piano

Details Touch force adjustment means for a piano Touch force adjustment means for a piano

1981-01-09

1983-05-03

Franklin, Lawrence R.

Music

Instruments

General features

G10C 312

Patent

active

043816916

ABSTRACT:
Means for adjusting the touch force required to depress the keys of a piano within the range normally preferred by pianists, comprising a plurality of spring member means having a relatively small spring constant (low stiffness). Each spring member means is connected at one of its ends to one of piano keys near the fulcrum thereof. Each spring member means is connected at its other end to a beam located above the keys and extending transversely thereof the full length of the keyboard. At least one of the connections of each spring member means is adjustable. The beam may be a single continuous member, or it may be made up of segments corresponding to groups of adjacent keys. In the initial adjustment each spring member means is typically prestressed by means of its adjustable connection to set the static touch force of its respective key to the desired value.

REFERENCES:
patent: 391940 (1888-10-01), Brooks
patent: 462636 (1891-11-01), Gibbs
patent: 489564 (1893-01-01), Long
patent: 721706 (1903-03-01), Huseby
patent: 2309537 (1943-01-01), Rienstra

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