Music – Instruments – Wind
Patent
1997-09-03
1999-04-27
Shoop, Jr., William M.
Music
Instruments
Wind
84382, 84384, 84385R, 84385A, G10D 700, G10D 900
Patent
active
058981160
ABSTRACT:
An improved plate assembly of woodwinds comprising a body being longitudinally provided with a plurality of tone holes is provided. Each of the tone holes is provided with a pair of posts at both sides. A copper shaft is pivotally mounted within the posts. A plate which may cover the tone hole is pivotally mounted onto the copper shaft. The lower portion of one of the posts is disposed with a resilient pin. The copper shaft is disposed with a projected pin shaft and a depressing key rod. The resilient pin is disposed such that the projected pin shaft is biased. When the depressing key rod is depressed, the copper shaft is rotated and the tone hole can be opened or closed by the plate to generate a special tone. The upper portion of the post is provided with a ball socket and both ends of the copper shaft are provided with a mounting hole respectively. One of the mounting hole of the pipe is provided with a groove. The mounting hole is disposed with a coil spring and a biasing pin having a ball head which is movably disposed within the mounting hole. The biasing pin is provided with annular groove and the ball head of the biasing pin is pivotally received within the socket of the post. By this arrangement, as the pipe is movably and resiliently disposed between the posts, the pipe can be easily assembled to the posts. Consequently, the locking arrangement with screws can be suitably prevented. Furthermore, the noise is also completely eliminated.
REFERENCES:
patent: 2744435 (1956-05-01), Anderson et al.
Fletcher Marlon T.
Shoop Jr. William M.
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