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    • 31. 发明授权
    • Sectionalized musical drums
    • 分段音乐鼓
    • US4300437A
    • 1981-11-17
    • US815405
    • 1977-07-13
    • Fred D. HingerWilliam D. Hinger
    • Fred D. HingerWilliam D. Hinger
    • G10D13/00G10D13/02
    • G10D13/021G10D13/028
    • The complete drum comprises two, axially-separable, generally cylindrical sections, which are open, inwardly, toward each other, each of these two sections having but one playing head, so that the two heads are disposed respectively at the outer ends of the cylindrical assembly. When the open ends of these two basic sections are axially spaced-apart to provide an annular gap between them, the space within said sections communicates with the ambient air, through said gap, substantially uniformly around the periphery of the drum. This construction, with gap, is intended to provide any desired increase in volume, and a great variety of tonal modifications.Means are provided for adjustably varying the size of the gap, or for closing it altogether; whereby the volume, pitch, dynamics, and tonal characteristics of the drum may be varied. This may be done by using adjustable holding means, and/or by using perforate or imperforate cylindrical filler pieces.
    • 整个滚筒包括两个可轴向分离的大致圆柱形部分,它们彼此敞开,向内,每个这两个部分具有一个游戏头,使得两个头部分别设置在圆柱形的外端 部件。 当这两个基本部分的开口端轴向间隔开以在它们之间提供环形间隙时,所述部分内的空间通过所述间隙大致均匀地围绕滚筒的周边连通环境空气。 这种具有间隙的结构旨在提供任何期望的体积增加和各种各样的色调修改。 提供了用于可调节地改变间隙的尺寸或者完全闭合的装置; 从而可以改变滚筒的体积,音调,动态和音调特性。 这可以通过使用可调保持装置和/或通过使用穿孔或无孔圆柱形填充件来完成。
    • 33. 发明授权
    • Adjustable pitch drum
    • 可调俯仰鼓
    • US4121493A
    • 1978-10-24
    • US831686
    • 1977-09-08
    • Randall L. May
    • Randall L. May
    • G10D13/00G10D13/02
    • G10D13/028G10D13/023
    • An adjustable pitch drum consists of a drum shell of any suitable shape having an open end, a drum head pitch changing mechanism, and a supporting structure mounting the pitch changing mechanism to the drum shell. The pitch changing mechanism consists of a threaded rod adjustably threaded to the supporting structure, a drum head clamping hoop mounted coaxially on the rod for rotation thereabout, and a drum head tensioning hoop non-rotatably mounted on the other end of the rod. Rotation of the drum head and its clamping hoop about the rod varies the tension of the drum head on the tensioning hoop, thereby changing the pitch of the drum. Movement of the threaded rod in the supporting structure changes the spacing of the drum head from the drum shell open end, thereby changing the resonance characteristics of the drum assembly.
    • 可调俯仰鼓由具有开口端的任何合适形状的鼓壳,鼓头俯仰改变机构和将俯仰改变机构安装到鼓壳的支撑结构构成。 间距改变机构包括可调节地连接到支撑结构的螺纹杆,同轴地安装在杆上用于在其周围旋转的鼓头夹紧箍,以及不可旋转地安装在杆的另一端的鼓头张紧箍。 鼓头及其夹持环围绕杆的旋转改变了鼓头在张紧环上的张力,从而改变了滚筒的间距。 螺杆在支撑结构中的运动改变了鼓头与鼓壳开口端的间距,从而改变了鼓组件的共振特性。
    • 34. 发明授权
    • Adjustable drum
    • 可调鼓
    • US4060019A
    • 1977-11-29
    • US715587
    • 1976-08-18
    • Charles P. Cordes
    • Charles P. Cordes
    • G10D13/02
    • G10D13/028
    • The adjustable drum is comprised of two cylindrical shells which are telescopically arranged for axial adjustment with respect to each other. At least one of the shells is constructed of metal and a separate set of casings for each drum head are provided on each shell. A plurality of spaced apart insulating strips are disposed between the shells which can be adjusted in a stepwise manner relative to each other. Special adapter plate is provided on one of the shells for supporting a conventional snare strainer mechanism.
    • 可调节滚筒由两个圆柱形壳体组成,它们可伸缩地布置成相对于彼此轴向调节。 至少一个壳体由金属构成,每个壳体上都设置有用于每个鼓头的独立套管。 多个间隔开的绝缘条被设置在壳之间,其可以相对于彼此以逐步方式调节。 在其中一个壳体上设有特殊的适配器板,用于支撑常规的圈套过滤器机构。