Adjustable barrel tuning apparatus for use with a woodwind musical instrument
US5291817A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jan 12, 1993 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Jan 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10D9/01
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An apparatus for varying the length of the barrel of a woodwind musical instrument by providing adjustability in the length thereof which includes two tubular members which are telescopingly movable with respect to one another and include a primary gear rack mounted on the second tubular member and a rotatably movable adjustment wheel mounted on the first tubular member with a gear fixedly secured to the adjustment wheel and in engagement with respect to the teeth of the primary gear rack such that movement of the adjustment wheel will cause movement of the primary gear rack and relative movement between the first and second tubular member for adjusting or tuning of the length between the first and second tubular members. Each tubular member defines a bore extending centrally therealong which is coincident on the same longitudinally extending bore axis. A locking device is included for selectively fixedly securing the first and second tubular members with respect to one another as desired. Also a first longitudinal orientation device is positioned on the first tubular member and a second orientation device is positioned on the second tubular member to prevent relative rotational mo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.