United States Patent
US Patent 7476793: Foster extension for flutes
US 7476793 ยท granted 2009-01-13
Abstract
A flute attachment which improves and enhances the harmonic capability of a flute by lengthening the resonant chamber of the standing wave. The instant invention `fine tunes` the harmonic range of the flute by taking into account the end point of the fundamental length of the sounding oscillations of an air column without negating the frequency which has been predetermined by the original terminus of the physical scale length of the flute. The sound wave length within a flute terminates slightly beyond the physical length of the flute tube and this difference in length is known as the `end correction`. The instant invention captures the node which extends beyond the flute tubing and balances and reinforces the propagation of upper partials throughout the sounding range of the instrument.
| Patent Number | 7476793 |
|---|---|
| Title | Foster extension for flutes |
| Filed | 2007-05-22 |
| Granted | 2009-01-13 |
| Inventor(s) | Williams; Gail I., Williams; David C. |
| CPC Classification | G10D 7/02 |
| Number of Claims | 31 |
Abstract
A flute attachment which improves and enhances the harmonic capability of a flute by lengthening the resonant chamber of the standing wave. The instant invention `fine tunes` the harmonic range of the flute by taking into account the end point of the fundamental length of the sounding oscillations of an air column without negating the frequency which has been predetermined by the original terminus of the physical scale length of the flute. The sound wave length within a flute terminates slightly beyond the physical length of the flute tube and this difference in length is known as the `end correction`. The instant invention captures the node which extends beyond the flute tubing and balances and reinforces the propagation of upper partials throughout the sounding range of the instrument.
Claim 1
An attachment for a flute comprising: an attachable length of tubing; wherein said length of tubing further comprises a first end to be inserted into a said flute footjoint,wherein a diameter of said first end of said length of tubing is reduced by 0.025 inches from the a diameter of said flute footjoint to which said first end of said length of tubing is to be inserted; wherein said length of tubing further comprises anon-inserted protruding second end, opposite to said first end be inserted into said flute footjoint, wherein said non-inserted protruding second end comprises a major bore diameter substantially equal to said diameter of said flute; wherein said secondprotruding end comprises a first and second vent which are tangent to the end of the tubing and are indented to allow the end of the existing flute tube to define the length of the waveform without dampening or flattening the pitch; and, wherein saidsecond protruding end comprises a length comprises a final air pressure node produced by playing said flute.
Claims
31 totalAn attachment for a flute comprising: an attachable length of tubing; wherein said length of tubing further comprises a first end to be inserted into a said flute footjoint,wherein a diameter of said first end of said length of tubing is reduced by 0.025 inches from the a diameter of said flute footjoint to which said first end of said length of tubing is to be inserted; wherein said length of tubing further comprises anon-inserted protruding second end, opposite to said first end be inserted into said flute footjoint, wherein said non-inserted protruding second end comprises a major bore diameter substantially equal to said diameter of said flute; wherein said secondprotruding end comprises a first and second vent which are tangent to the end of the tubing and are indented to allow the end of the existing flute tube to define the length of the waveform without dampening or flattening the pitch; and, wherein saidsecond protruding end comprises a length comprises a final air pressure node produced by playing said flute.