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    • 35. 发明授权
    • Engineered composite wooden crib for use as a mine support
    • 工程复合木制婴儿床用作矿山支援
    • US07841805B2
    • 2010-11-30
    • US11900486
    • 2007-09-12
    • Yoginder Paul Chugh
    • Yoginder Paul Chugh
    • E21D15/00
    • E21D15/02
    • This invention provides improvements through 1) a composite, engineered wooden support element for construction of cribs in mines to provide support between two surfaces, 2) use of support elements to construct cribs, and 3) a wedge system to provide substantial sustained preload on a crib. The wooden support element consists of a center elongate element wherein the wood grain runs transversely to the crib element loading direction, and at least two outer plate elements wherein the wood grain runs axially with the crib element loading direction. Each outer plate element is attached to a surface of the center elongate element using fastening means and the outer plate element wood grain direction is aligned transversely to the grain direction in the center elongate element. The crib structure may be constructed by superimposing only these support elements in 2×2 layers or in conjunction with solid prismatic wooden elements. A wooden wedge system with relatively low angle surface and with wood grain running axially is utilized to apply vertical preload. Due to high stiffness of the wedge in the axial direction, a substantial vertical preload can be applied and sustained to make cribbing structure a more efficient load carrying structure. The wooden support elements are lightweight, have controllable higher stiffness and load carrying capacity than current cribs, engineered yielding characteristics and allow much lower resistance to air flow in underground mine roadways.
    • 本发明通过以下方面提供了改进:1)用于在矿井中建造婴儿床以在两个表面之间提供支撑的复合工程木质支撑元件,2)使用支撑元件构造婴儿床;以及3)楔形系统,以在 婴儿床 木制支撑元件由中心细长元件组成,其中木纹横向于婴儿床装载方向延伸,以及至少两个外部板元件,其中木材纹理沿着婴儿床装载方向轴向延伸。 每个外板元件使用紧固装置附接到中心细长元件的表面,并且外板元件木纹方向在中心细长元件中横向于颗粒方向对准。 婴儿床结构可以通过仅将这些支撑元件叠加在2×2层中或与实心棱柱形木质元件结合而构成。 使用具有相对较低角度表面并且轴向运行的木纹的木制楔形系统来施加垂直预载荷。 由于楔形件在轴向方向上的高刚度,可以施加和维持基本上的垂直预载荷,以使得装载结构成为更有效的承载结构。 木制支撑元件重量轻,具有比目前的婴儿床更高的刚度和承载能力,设计屈服特性,并允许在地下矿井道路中气流阻力更低。
    • 36. 发明申请
    • Tinnitus Testing Device and Method
    • 耳鸣测试装置及方法
    • US20090163828A1
    • 2009-06-25
    • US12397277
    • 2009-03-03
    • Jeremy TurnerJames Michael Kinder
    • Jeremy TurnerJames Michael Kinder
    • A61B5/00
    • A61B5/128A61B5/04001A61B5/04845A61B5/121A61F11/00
    • Objectively identifying an acoustic characteristic of tinnitus of a subject. The subject is exposed to a sound pattern having a background acoustic signal preceding an audible silence. The background acoustic signal has a selected acoustic characteristic. An electrical response of the subject's central nervous system to the exposure to the sound pattern is measured. The measured electrical response has a first portion representing the electrical response of the subject's central nervous system to the background acoustic signal, and a second portion representing the electrical response of the subject's central nervous system to the audible silence in the sound pattern. The first portion of the measured electrical response is compared to the second portion of the measured electrical response and a determination is made as to whether the subject has tinnitus with an acoustic characteristic similar to the selected acoustic characteristic based on the comparison.
    • 客观地识别受试者的耳鸣的声学特征。 受试者暴露于具有在可听见沉默之前的背景声信号的声音图案。 背景声信号具有选定的声学特征。 测量受试者的中枢神经系统对声音模式的暴露的电响应。 测量的电响应具有表示受试者的中枢神经系统对背景声信号的电响应的第一部分,以及表示受试者的中枢神经系统对声音模式中的可听静音的电响应的第二部分。 将测量的电响应的第一部分与测量的电响应的第二部分进行比较,并且基于该比较确定对象是否具有与所选择的声学特性相似的声学特征的耳鸣。