Automatic player piano and estimator for acceleration of depressed key incorporated in the automatic player piano
US5652399A · kind A · utility
19Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1996 |
| Grant date | Jul 29, 1997 |
| Priority date | — |
| Expiry date | Jun 28, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/07
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An automatic player piano controls keys to be rotated by solenoid-operated actuator units in such a manner as to pass a reference point on a trajectory of the key at a reference velocity in a playback mode, and a hammer driven by the depressed key strikes strings at the same intensity as that in a recording mode, because the intensity is variable with the reference velocity at the reference point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.