Keyboard apparatus of electronic musical instrument
US4901614A · kind A · utility
28Cited by
6References
56Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1987 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/07
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A keyboard apparatus of an electronic musical instrument includes keys, mass members, and springs. Each key can pivot about a first pivot fulcrum. Each mass member can pivot about a second pivot fulcrum. Each spring supplies a biasing force to at least the corresponding mass member so that the mass member returns to an initial state. In this apparatus, each key has a point of application for pivoting the corresponding mass member in the same direction as a pivoting direction of each key when each key is depressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.