Patent ID: 8283540
Filing Date: 2012-10-09
Classification: G10D

Abstract:
1. A musical instrument tuning apparatus capable of slidingly adjusting a position of a first portion of a musical instrument relative to a second portion of said musical instrument to thereby increase a length of an air passage of said musical instrument, the positioning apparatus comprising: a tuning sleeve having a first sleeve end, a second sleeve end, a sleeve inner surface and a sleeve outer surface, the sleeve inner surface configured to fit over a first portion of a musical instrument with part of the first portion protruding through the tuning sleeve, the sleeve outer surface having a first thread; a tuning collar having a first collar end, a second collar end, a collar inner surface and a collar outer surface, the collar inner surface having a second thread configured to threadingly engage the first thread belonging to the sleeve outer surface, the first collar end configured to abut a second portion of said musical instrument when said second portion is slidably mounted on said part of the first portion; wherein: when the tuning apparatus and second portion are mounted on the first portion of the musical instrument with the first collar end in abutment with the second portion, upon rotation of the tuning collar in a first direction, the tuning collar is configured to travel relative to the tuning sleeve and urge the second portion in a direction away from the tuning sleeve, to thereby change a pitch of the musical instrument, and said second portion remains in position on said part of the first portion and the length of the air passage remains unchanged upon rotation of the tuning collar in a second direction opposite to the first direction.