Patent ID: 8748720
Filing Date: 2014-06-10
Classification: G10D

Abstract:
1. A trombone which changes pitch by varying the tube length thereof comprising: a pair of stationary tubes disposed spaced apart from each other in a first plane, each of said tubes of said first pair having a first end and a second end; a first substantially U-shaped slide element, said slide element having a pair of non-stationary tubes disposed spaced apart from each other in a second plane, each of said tubes of said pair being a having a first end and a second end, each of said pair of legs being joined on said first ends thereof by a crook, said pair of non-stationary tubes being closer to each other than said pair of stationary tubes are to each other; means for coupling said first ends of said pair of non-stationary tubes to each other, said coupling means being disposed substantially in said second plane; a bell for affixment to said first end of one of said pair of stationary tubes; a mouth piece for affixment to said first end of the other of said pair of stationary tubes; a moveble slide assembly, said moveable slide assembly including a second and a third substantially U-shaped slide elements, said second and said third slide elements each having a pair of legs, each of said legs each having a first and a second end, each of said pair of legs being joined on said first ends thereof by a crook, said second ends of each of said pairs of adjacent legs being dimensioned for slideably engaging a corresponding one of said second ends of said pair of stationary tubes and said pair of non-stationary tubes such that said second ends of said first pair of said adjacent legs slidably engage, respectively, one of said second ends of said first pair of said stationary tubes and one of said second ends of said pair of non-stationary tubes, said second ends of said second pair of said adjacent legs slidably engaging, respectively, the other of said second ends of said pair of said stationary tubes and the other of said second ends of said pair of said non-stationary tubes, said first and said second pairs of substantially U-shaped slide tube members being joined together for simultaneous movement; and a said non-stationary tubes restrained in the direction of the slide by a flexible connection between the crook and a cross brace, said flexible connection allowing lateral movement of the first substantially U-shaped slide element.