Jack motion-restricting device for upright piano

Details Jack motion-restricting device for upright piano Jack motion-restricting device for upright piano

2007-02-05

2008-08-05

Donovan, Lincoln (Department: 2837)

Music

Instruments

Rigid vibrators

C084S240000, C084S241000, C084S242000, C084S243000

Reexamination Certificate

active

07408102

ABSTRACT:
A jack motion-restricting device for an upright piano, which is capable of maintaining constant a jack motion-restricting position by a simple construction to thereby obtain an intended operation of the jack. The jack motion-restricting device restricts the motion of the jack operating in accordance with key depression by having the jack abut thereagainst. A base part of the device is provided at a location close to the jack. A base layer of the same is formed of a material having dimensional stability, and is affixed to the base part. A surface layer of the same is formed of a material having abrasion resistance and flexibility, and is affixed to the base layer, for having the jack abut thereagainst.

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