Apparatus for assembling and regulating a grand piano action
US8227674B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2010 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Dec 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10C3/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A practical means to position and adjust the parts of a grand piano's action outside of the piano to fit and play properly, precisely, and as expected in the piano. A custom keybed supports the action as supported in the piano and secures its position. A regulating rack holds one or more reference edges above the action to delineate strike position (the location of hammer-to-string contact in the piano) and those distances from strike required for regulating. It also records hammer spacing at strike. A hammer squaring platform allows a shank traveler and hammer square to set up the hammers to address their strings vertically. And a string height gage assembly, including gage, sliding base, and rail, measures and records strike position in the piano to accurately set up the regulating rack's reference edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.