Method of improving repetitive striking performance, jack and action mechanism of piano
US7126049B2 · kind B2 · utility
1Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2004 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Jan 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10C9/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A jack used in an action mechanism of a piano has substantially an L-shape, composed of a big jack portion and a small jack portion. The thickness of the small jack portion is made smaller than that of the big jack portion in a direction of key arrangement in a state of the jack being fitted in the piano. By reducing the weight of the small jack portion as above, the time required for the jack to return to a position capable of pushing up a part of a striking member can be shortened. Accordingly, more frequent repetitive striking is allowed within a predetermined period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.