Key mechanism of bassoon

Details Key mechanism of bassoon Key mechanism of bassoon

1997-11-25

1999-04-06

Shoop, Jr., William M.

Music

Instruments

Wind

84385P, 84386, 84388, G10D 700

Patent

active

058921672

ABSTRACT:
A bassoon equipped with a key mechanism is constructed by a tube which consists of a tenor joint, a double joint, a long joint and a bell joint. Herein, three sound holes corresponding to sounds of E, B.music-flat. and F.music-sharp. are located in the double joint. Three keys corresponding to E, B.music-flat., F.music-sharp. are provided to open or close the three sound holes respectively and are all manipulated by the fingering using only a thumb of a right hand of a performer. Herein, an E key which is the center of the three keys is specialized in construction. That is, the E key which is located to cover the E sound hole is constructed by a pad cup and a key body whose size is reduced as compared with the conventional one. Two recesses are formed at both sides of the key body respectively. In addition, two rollers are held by the two recesses above the pad cup. The rollers are located to partially overlap with the pad cup in a plan view, however, elevation of the rollers is different from that of the pad cup. An axial distance between the rollers is made smaller than an outer diameter of the pad cup. Thanks to reduction of the size of the E key as a whole, it is possible for the performer to move the thumb of the right hand from the E key to the B.music-flat. key or to the F.music-sharp. key with ease. Thus, it is possible to respond to fast passage with ease.

REFERENCES:
patent: 4723470 (1988-02-01), Yamaryo
patent: 4798122 (1989-01-01), Gisler et al.
patent: 4957029 (1990-09-01), Kahonen
patent: 5237922 (1993-08-01), Hamanaga

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