Damper bar adjustment mechanism for keyboard percussion instrument
US10593309B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2017 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Dec 19, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10D13/09
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A keyboard percussion instrument (100) generates sounds when keys (130) or other such members are struck. A movable damper bar (140) is brought into contact with the keys to artistically shorten their ringing duration. When pressed, a pedal (145) removes the damper bar from contact with the keys. When the pedal is released, a spring (1010) urges the damper bar into contact with the keys. The damper bar is supported by a pair of arms (165) that pivot about pivot points (800) at the ends of movable posts (520) that extend from a pair of pivot height adjusting mechanisms (175). Each pivot height adjusting mechanism has two adjusting screws. A first screw (510) urges a post to move up or down and a second screw (565) fixes the post in position when tightened. Adjusting the heights of the pivot points provides control over the damping of key vibrations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.