Horn with intermediate tube network enlarged in inner diameter

Abstract: A full-double French horn comprises a mouth piece (1), a front tube member (2), an intermediate tube network (3) associated with valves (3a/ 3d/ 3f/ 3j), a rear tube member (4) and a bell (5) for defining a vibrative column of air, and the inner diameter of the intermediate tube network affects fortissimo sounds and low-pitched sounds, wherein the inner diameter of the intermediate tube network ranges from 12.8 millimeters to 13.5 millimeters so as to improve the fortissimo and low-pitched sounds without sacrifice of timbre and a good feeling in the blowing.

Description: FIELD OF THE INVENTION This invention relates to a horn and, more particularly, to an intermediate tube network incorporated in the horn. DESCRIPTION OF THE RELATED ART A typical example of the horn largely comprises a mouth piece, a front taper tube, an intermediate tube network, a rear taper tube and a bell, wherein the front taper tube, the intermediate tube network, the rear taper tube and the bell provide a wind passage therein. When a player buzzes in the mouth piece, a column of air defined by the wind passage vibrates, and produces a sound. The mouth piece is shaped into a funnel, and is coupled with the front end of the front taper tube. The inner wall of the front taper tube defines a bore, and the bore is increased in diameter from the mouth piece. The intermediate tube network is coupled with the rear end of the front taper tube, and provides two wind sub-passages. Two valves are provided at the inlet and the outlet of the intermediate tube network, respectively, and the valve at the outlet selectively couples the bore of the front taper tube with the two wind sub-passage for changing the key-note. The two wind sub-passages have a constant inner diameter, ranging from 11.9 millimeters to 12.1 millimeters. A plurality of valves are provided in association with each of the wind sub-passages, and the player changes the pitch by using these valves. The value at the rear end of the intermediate tube network is coupled with the front end of the rear taper tube, and allows the selected wind sub-passage to be conected with the bore formed in the rear taper tube. The bore in the rear taper tube is increased in diameter from the front end to the rear end thereof. The bell is coupled with the rear end of the rear taper tube, and diffuses the sound produced through the vibrations of the column of air. When the player performs music with the prior art horn, the loudness of sounds is controlled through breathing, and the pitch is changed by using the valves and the buzzing. However, the prior art horn does not satisfy the player because of a narrow dynamic range, and most of players expects the prior art horn to improve fortissimo sounds and low-pitched sounds. SUMMARY OF THE INVENTION It is therefore an important object of the present invention to provide a horn which produces an improved fortissimo sound and an improved low-pitched sound without a sacrifice in timbre and a feeling in the blowing. The present inventor contemplated the problem inherent in the prior art horn, and found that the inner diameter of the intermediate tube network affected fortissimo sounds and low-pitched sounds. The present inventor repeated trial manufacture, and determined an appropriate range for the inner diameter. To accomplish the object, the present invention proposes to form a wind passage of an intermediate tube within a range between 12.8 millimeters and 13.5 millimeters. In accordance with the present invention, there is provided a full-double French horn for producing a sound through vibrations of a column of air, comprising: a) a mouth piece where a player buzzes; b) a front tube means connected at one end thereof with the mouth piece, and defining a first wind passage increased in diameter from the aforesaid one end toward the other end thereof; c) an intermediate tube means connected at one end thereof with the other end of the front tube means, and defining a second wind passage having a constant diameter ranging from 12.8 millimeters to 13.5 millimeters; d) a rear tube means coupled at one end thereof with the other end of the intermediate tube means, and defining a third wind passage increased in diameter from the aforesaid one end toward the other end thereof, ; and e) a bell means coupled with the other end of said rear tube means, and defining a fourth wind passage for diffusing the sound, the first, second, third and fourth wind passages defining the column of air. BRIEF DESCRIPTION OF THE DRAWINGS The feature and advantages of the horn according to the present invention will be more clearly understood from the following description taken in conjunction with the accompanying drawings in which: Fig. 1 is a schematic view showing a full-double French horn according to the present invention; and Fig. 2 is a graph showing the inner diameter of a wind passage defined in the full-double French horn according to the present invention as well as the inner diameter of the prior art. DESCRIPTION OF THE PREFERRED EMBODIMENT Referring first to Fig. 1 of the drawings, a full-double French horn largely comprises a mouth piece 1, a front tube member 2, an intermediate tube network 3, a rear tube member 4 and a bell 5. The mouth piece 1, the front tube member 2, the intermediate tube network 3, the rear tube member 4 and the bell 5 are formed of brass. However, nickel alloy is available for them. The mouth piece 1, the front tube member 2, the intermediate tube network 3, the rear tube member 4 and the bell 5 are adjusted to 60 millimeters, 500 millimeters, 800 millimeters, 550 millimeters and 850 millimeters in length. The mouth piece 1 is shaped into a funnel, and is connected with a front end of the front tube member 2. A first wind passage 2a is formed in the front tube member 2, and the first wind passage 2a is tapered from the front end toward a rear end of the front tube member 2. In other words, the first wind passage 2a is gradually increased in diameter from the front end to the rear end. However, the inner wall of the front tube member 2 is constituted by curved surfaces, and, accordingly, the taper non-linearly increases the diameter of the first wind passage 2a. The front tube member 2 per se serves as a front tube means in this instance. However, a plurality of tapered tube members may constitute the first wind passage 2a. The intermediate tube network 3 is fabricated from a front change-over valve 3a, two front straight tube members 3b and 3c, a set of valve units 3d coupled through interconnecting tube members 3e, another set of valve units 3f also coupled through interconnecting tube members 3g connected with the rear end of the front tube member 2, two rear straight tube members 3h and 3i and a rear change-over valve 3j. The front change-over valve 3a has an inlet coupled with the rear end of the front tube member 2, and the front straight tube members 3b and 3c are coupled with two outlets of the front change-over valve 3a. The set of valve units 3d is coupled between the front straight tube member 3b and the rear straight tube member 3h, and the other set of valve units 3f is coupled between the front straight tube member 3c and the rear straight tube member 3i. The rear straight tube members 3h and 3i are respectively coupled with two inlets of the rear change-over valve 3j, and the outlet of the rear change-over valve 3j is coupled with the rear tube member 4. The front straight tube member 3b, the set of valve units 3d, the interconnecting tube members 3e and the rear straight tube member 3h form in combination a wind sub-passage 3k therein, and the wind sub-passage 3k is constant in diameter. Similarly, the front straight tube member 3c, the set of valve units 3f, the interconnecting tube members 3g and the rear straight tube member 3i form in combination another wind sub-passage 3m therein, and the wind sub-passage 3m is also constant in diameter. The wind sub-passages 3k and 3m serve as a second wind passage. In this instance, the wind sub-passages 3k and 3m are equal in diameter to one another, and the constant diameter of each wind sub-passage 3k or 3m ranges between 12.8 millimeters and 13.5 millimeters. The wind sub-passage 3k is assigned to the key node F, and the other wind sub-passage 3m is assigned to the key B b , and a player manipulates the front and rear change-over valves 3a and 3j so that one of the wind sub-passages 3k and 3m is conducted between the front tube member 2 and the rear tube member 4. The sets of valve units 3d and 3f change the pitch of a sound, and the notes progresses along the selected scale by manipulating the set of valve units and buzzing. A third wind passage 4a is formed in the rear tube member 4, and the third wind passage 4a is tapered from the front end toward a rear end of the rear tube member 4. In other words, the third wind passage 4a is gradually increased in diameter from the front end to the rear end. However, the inner wall of the rear tube member 4 is constituted by curved surfaces different in radius, and accordingly, the taper non-linearly increases the diameter of the third wind passage 4a. The rear tube member 4 per se serves as a rear tube means in this instance. However, a plurality of tapered tube members may constitute the third wind passage 4a. The bell 5 also defines a fourth wind passage 5a, and the fourth wind passage 5a is tapered from the front end toward a rear end of the bell 5. In other words, the fourth wind passage 5a is gradually increased in diameter from the front end to the rear end. However, the inner wall of the bell 5 is constituted by curved surfaces different in radius, and, accordingly, the taper non-linearly increases the diameter of the fourth wind passage 4a. The rear tube member 4 per se serves as a rear tube means in this instance. The first wind passage 2a, the wind sub-passage 3k or 3m, the third wind passage 4a and the fourth wind passage 5a are sequentially connected, and define a column of air. The radius of the column of air varies as indicated by solid line A in Fig. 2, and is larger than the column of air defined in the prior art horn. Broken line B indicates the variation of radius of the column of air defined in the prior art horn. While performing music, a player buzzes into the mouth piece 1, and the column of air vibrates. The player varies the tension of his lips and manipulates the set of valve units associated with the selected wind sub-passage, and sequentially changes the pitch of the sound therethrough. By virtue of the enlarged wind sub-passage, fortissimo sounds and low-pitched sounds are improved without sacrifice of timbre and a good feeling in the blowing. If the diameter of the wind sub-passage 3b, 3e and 3k or 3c, 3e and 3m is less than 12.8 millimeters, the fortissimo sounds are not large enough to be satisfactory, and the low-pitched sounds are unclear, because the vibrating column of air is small. On the other hand, if the diameter of the wind sub-passage 3b to 3k or 3c to 3m is greater than 13.5 millimeters, the column of air is too large, and the timbre and the feeling become different and strange. As will be appreciated from the foregoing description, the horn according to the present invention appropriately enlarges the column of air, and improves fortissimo sound and low-pitched sounds without sacrifice of the timbre and the good feeling. Although a particular embodiment of the present invention has been shown and described, it will be obvious to those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. Moreover, any combination of key notes may be assigned to wind sub-passages of an intermediate tube network, and the wind sub-passage may be different in diameter in so far as the diameters fall into the range according to the present invention.

Claims: A full-double French horn for producing a sound through vibrations of a column of air, comprising: a) a mouth piece (1) where a player buzzes; b) a front tube means (2) connected at one end thereof with said mouth piece, and defining a first wind passage (2a) increased in diameter from said one end toward the other end thereof; c) an intermediate tube means (3) connected at one end thereof with the other end of said front tube means, and defining a second wind passage (3k/ 3m) having a constant diameter; d) a rear tube means (4) coupled at one end thereof with the other end of said intermediate tube means, and defining a third wind passage (4a) increased in diameter from said one end toward the other end thereof; and e) a bell means (5) coupled with the other end of said rear tube means, and defining a fourth wind passage (5a) for diffusing said sound, said first, second, third and fourth wind passages defining said column of air, characterized in that said constant diameter ranges from 12.8 millimeters to 13.5 millimeters. A full-double French horn as set forth in claim 1, in which said intermediate tube means (3) comprises a plurality of first change-over valves (3a/ 3j), and defines a plurality of wind sub-passages (3k/ 3m) respectively assigned to key notes and selectively conducted with said first and third wind passages by means of said plurality of first change-over valves. A full-double French horn as set forth in claim 2, in which a plurality sets of second valves (3d/ 3f) are respectively provided for said plurality of wind sub-passages for changing the pitch of said sound. A full-double French horn as set forth in claim 3, in which said plurality of wind sub-passages (3k/ 3m) are equal in diameter.

Inventors: HAMANAGA SHINJI, HAMANAGA, SHINJI, Hamanaga, Shinji, c/o Yamaha Corporation
Applicants: YAMAHA CORP, YAMAHA CORPORATION
Application year: 1993
Main classification: G10D7
IPC codes: G10D9, G10D7