Vacuum pump operated musical instrument |
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| 申请号 | US3670617D | 申请日 | 1971-06-25 | 公开(公告)号 | US3670617A | 公开(公告)日 | 1972-06-20 |
| 申请人 | ERNEST HAILE; | 发明人 | HAILE ERNEST; | ||||
| 摘要 | A vacuum pump operated musical instrument is herein described which includes a hollow cylindrical body. The body is formed to define at least one aperture in the cylindrical wall thereof. The hollow body is open at one end and closed at the opposite end. A piston is slidably mounted within the cylindrical body for reciprocation past the aperture. As the piston is moved past the aperture, in a direction from the closed end to the opened end of the hollow body, the piston draws a vacuum and then suddenly communicates that vacuum to the ambient through the aperture. Air rushing in from the ambient into the vacuum space is acted upon the size and configuration of the aperture to form an audible sound. A second piston arrangement may be disposed between the aperture and the closed end of the hollow body. The second piston arrangement may be manually positioned to vary the volume of the vacuum retaining space. The adjustment of the volume of the last mentioned space is operable to controllably vary the pitch of the sound caused by air rushing from ambient into that space. Alternatively, a sleeve member may be coaxially and slidably mounted over the open end of the tubular shaped body so as to be adjustable with respect to the aperture. Axial movement of this sleeve member is operable to controllably vary the pitch of the sound in response to the position of the sleeve member. A one way valve is mounted within the first piston as a compression relief mechanism when the first piston is moved toward the closed end of the tubular body, before commencing the vacuum stroke. If it is found that the vacuum formed between the two pistons is too great when both pistons are moved in opposite directions at the same time, the compression relief valve may be opened manually by a control mechanism associated with the first piston arrangement to dissipate some of the vacuum. | ||||||
| 权利要求 | 1. A vacuum operated, musical, wind instrument comprising: a. a hollow body; b. said body being formed to define at least one aperture in a side wall portion thereof; c. means disposed within said body for creating a vacuum within said body adjacent said aperture in response to initial movement of said means; d. said last mentioned means further operaBle to produce an audible sound by suddenly communicating said vacuum with ambient through said aperture in response to further movement of said means; and e. second means for controllably varying the pitch of said audible sound in response to movement of said second means with respect to said aperture in the course of playing said instrument. 2. A musical instrument according to claim number 1 wherein said hollow body comprises a tubular configuration. 3. A musical instrument according to claim number 1 wherein said second means for controllably varying the pitch of said audible sound comprises; A piston means for varying the volume of space within said body for retaining said vacuum. 4. A musical instrument according to claim number 1 wherein said means for controllably varying the pitch of said audible sound comprises a sleeve member slidably supported over said body. 5. A musical instrument according to claim number 4 wherein said sleeve is open at one end and closed at an opposite end. 6. A musical instrument according to claim number 1 wherein said means for creating a vacuum within said body comprises; A piston slidably mounted within said body and provided with a one-way compression relief valve. 7. A musical instrument according to claim number 6 with the addition of means for manually opening said valve to dissipate at least a portion of a vacuum created by said piston. 8. A vacuum operated, musical, wind instrument comprising: a. a hollow elongated body; b. at least one aperture formed in a wall defining said body; c. said body being open at a first end and closed at a second end thereof; d. a first piston slidably mounted within said body for axial movement therein, a first axial end of said first piston facing said first end of said body and a second axial end of said piston facing said second end of said body; e. the available stroke and axial length of said first piston being sized with respect to said aperture to initially draw a vacuum within said body adjacent said second axial end of said first piston and then to suddenly communicate that vacuum with ambient, through said aperture, upon further movement of said first piston towards said first end of said body and past said aperture; and f. second piston means movably mounted within said body and disposed between said aperture and said second end of said body, said second piston being operable to controllably vary the volume of space defined by said hollow body and mutually opposed faces of said first and second pistons. 9. A musical instrument according to claim number 8 with the addition of a sleeve member slidably supported, coaxially over said first end of said body for reciprocating movement over said apertures; Whereby, the pitch of audible sounds developed by the rush of air through said aperture may be controllably varied. 10. The musical instrument according to claim number 9 wherein, the first end of said sleeve is closed and the second end is open for receiving the first end of said elongated body. 11. A musical instrument according to claim number 8, with the addition of one-way valving means for relieving compression developed adjacent said second axial end of said first piston upon moving said first piston towards said second end of said body 12. A musical instrument according to claim number 8 with the addition of means carried by said first piston for manually opening said valving means when it is desired to dissipate at least a portion of a vacuum developed between the mutually opposed faces of said first and said second pistons. |
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