Music – Instruments – Wind
Patent
1997-01-08
1999-01-26
Gellner, Michael L.
Music
Instruments
Wind
84383R, 84386, G10D 706
Patent
active
058640762
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention concerns a clarinet barrel.
BACKGROUND OF THE INVENTION
The method normally used to tune a clarinet is to alter the position of the barrel in relation to the top joint. To this end, the clarinet barrel is pulled upwards from the top joint by approx. 1-2 mm. Since the barrel is merely pushed onto the top joint (a corked tenon on the top joint of the clarinet grips into a socket on the clarinet barrel), i.e. the connection is simply of a push-pull type, it is not only difficult to adjust the exact relative position between the clarinet barrel and the top joint to tune the instrument, but there is also a risk that the position of the barrel in relation to the top joint will alter unintentionally.
A further disadvantage of the state of the art is that at the point of transition between the tenon on the top joint of the clarinet that grips into the clarinet barrel and the clarinet barrel itself there is a difference in the diameter of the bore (the internal diameter of the clarinet), creating a gap between the end of the top joint and the clarinet barrel. This causes problems by negatively effecting the intonation of the short notes A and B-flat.
From U.S. Pat. No. 5,249,499 A, a clarinet barrel is known whose effective length can be adjusted to tune the clarinet with 2 threaded parts screwing into each other. The clarinet barrel in U.S. Pat. No. 5,249,499 A consists of a fixed part mounted on the top joint and a threaded ligature that can be screwed into position with the help of the outer casing of the fixed part. In addition, the clarinet barrel to U.S. Pat. No. 5,249,499 A is fitted with a part to be connected to the mouthpiece of the clarinet and which, by means of an extension socket, is inserted into the extension socket of the fixed part. The part of the clarinet barrel to be connected to the mouthpiece of the clarinet carries an outer thread that is screwed onto the inner thread of the threaded part. By rotating the threaded part, the part of the clarinet barrel connected to the mouthpiece is moved towards the fixed part or away from it, depending on the direction of turn, thus shortening or lengthening the clarinet barrel.
SUMMARY OF THE INVENTION
The invention is based on the task of specifying a clarinet barrel that permits simple and reliable turning of the clarinet and which has a simple structure without an appearance that differs from the usual non-extensible clarinet barrel.
The clarinet barrel according to the invention permits the clarinet to be tuned simply without changing the position of the clarinet barrel with respect to the top joint of the clarinet. Since the use of the clarinet barrel according to the invention does not give rise to any great difference in the inner bore when tuning the clarinet, no problems arise with the short notes.
In the invention, the necessary change in the length of the clarinet barrel that alters the distance between the mouthpiece and the top joint, as needed to tune the clarinet, is particularly simple to achieve, permitting a spatially favorable arrangement and simple design of the clarinet barrel. Since in the clarinet barrel according to the invention the inner part of the clarinet barrel is connected to the outer part of the barrel by a threaded connection, the length of the clarinet barrel can be adjusted by simply turning the outer part in relation to the inner part. In the invention there is also no risk that the setting of the length of the clarinet barrel will change.
The two parts of the clarinet barrel that fit together are preferably sealed by the provision of a ring-shaped groove in the outer surface of the inner part of the clarinet barrel. This groove contains a sealing ring that presses against the inner surface of the outer part of the clarinet barrel.
In one embodiment of the invention, it is provided that a ring is fixed to the inner part of the clarinet barrel, forming an extension bearing an outer thread, with a ring-shaped part bearing an inner thread fitted to the outer part of the clarinet
REFERENCES:
patent: 1308903 (1919-07-01), Gulick
patent: 2098457 (1937-11-01), Loomis
patent: 2508550 (1950-05-01), Stubbins
patent: 3438298 (1969-04-01), Thompson
patent: 5249499 (1993-10-01), Goldstein et al.
Gellner Michael L.
Hsieh Shih-yang
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