Method of constructing trumpet or other brass instrument
Patent 4273020 Issued on June 16, 1981. Estimated Expiration Date: 
May 24, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 24, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1385202 2987950 InventorApplicationNo. 06/042109 filed on 05/24/1979US Classes:84/394, Tuning devices84/387RBrassesExaminersPrimary: Franklin, Lawrence R.Attorney, Agent or FirmInternational ClassesG10D 7/00 (20060101)G10D 7/10 (20060101) AbstractA method of constructing a trumpet or other brass instrument is disclosed wherein a zone of increased taper is formed on the cylindrical inner surface of the mouthpipe to provide an improved air column between the mouthpiece and valve sections of the instrument. The zone of increased taper is critically positioned along the length of the mouthpipe to coincide with the pressure maximum points of selected notes in the upper octave of the normal playing range of the instrument to yield a chromatic scale that is nominally true to desired pitch. | |
