Compact device for adjusting piano key touch weight

Details Compact device for adjusting piano key touch weight Compact device for adjusting piano key touch weight

2009-05-18

2010-12-07

Enad, Elvin G (Department: 2832)

Music

Instruments

General features

C084S439000, C084S423001, C084S026000, C084S027000

Reexamination Certificate

active

07847173

ABSTRACT:
A series of adjustable springs, rigidly suspended above the keys of a piano, provides a downward force which reduces the effort needed to depress the keys. Precise adjustment of the series, and its attachment to the piano are facilitated through the use of existing fastener hardware within the conventional piano architecture.

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The Inner Workings of One Note in a Grand Piano, illustrated a key stop rail, © Oct. 2000, viewed Jan. 25, 2010 at http://www.concertpitchpiano.com/GrandActionModel.html.
Schematic of the Steinway Model M Grand Piano, Indicates a Key Stop Rail (item 13), © 2009, viewed Jan. 25, 2010 at http://www.steinway.com/technical/schematic—5.shtml.

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