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    • 6. 发明授权
    • Adjustable bed canopy and curtain system
    • 可调式床罩和窗帘系统
    • US5718254A
    • 1998-02-17
    • US735187
    • 1996-10-25
    • David A. Murphy
    • David A. Murphy
    • A47C29/00
    • A47C29/003
    • An adjustable bed canopy and curtain system including a sheet of fabric, at least four vertical post and a frame member. The frame member has a first pair of "L" shaped tubular members and a second pair of "L" shaped tubular members. Each of the first and second pair of "L" shaped tubular members have a lower elongated portion and an upper elongated portion. Each of the first and second pair of "L" shaped tubular members have a horizontal bar projecting from one of the lower elongated portions and capable of coupling with a horizontal bar of another of the lower elongated portions. The upper elongated portion, of each of the first pair of tubular members, receives the upper elongated portions of the second pair of tubular members when the horizontal bars of each tubular member are coupled. Each of the lower elongated portions, of each of the first and second tubular members, are positioned over one of the four vertical post when the first and second pair of tubular members are coupled. The sheet of fabric is positioned over the coupled first and second tubular members.
    • 一种可调节的床罩和窗帘系统,包括一层织物,至少四个垂直柱和框架构件。 框架构件具有第一对“L”形管状构件和第二对“L”形管状构件。 第一和第二对“L”形管状构件中的每一个具有下部细长部分和上部细长部分。 第一和第二对“L”形管状构件中的每一个具有从下部细长部分中的一个突出并能够与另一个下部细长部分的水平杆联接的水平杆。 当每个管状构件的水平杆联接时,第一对管状构件中的每一个的上部细长部分接收第二对管状构件的上部细长部分。 当第一和第二对管状构件联接时,每个第一和第二管状构件的每个下部细长部分定位在四个垂直柱的一个上。 织物片位于联接的第一和第二管状构件上方。
    • 7. 发明授权
    • Micro-processor control of compression ratio at full load in a helical
screw rotary compressor responsive to compressor drive motor current
    • 螺旋式螺杆式旋转压缩机中满负荷压缩比的微处理器对压缩机驱动电动机电流的控制
    • US4519748A
    • 1985-05-28
    • US659039
    • 1984-10-10
    • David A. MurphyPeter C. Spellar
    • David A. MurphyPeter C. Spellar
    • F01C1/16F04B49/06F04C18/16F04C28/12G05D27/02
    • F04C28/125F04C18/16F04C2270/07F04C2270/60
    • An axial flow helical screw type compressor has a slide valve member and slide stop member mounted end to end beneath the intermeshing rotors such that the slide valve member controls communication between the work chamber defined by the rotors and the casing to the outlet port and the slide stop member and the valve member together control the working fluid inlet to the bores of the rotors, the slide valve member and the slide stop being independently movable. Control means for the slide valve member and slide stop include position sensing means for these two members, inlet and outlet pressure sensing means, and means for feeding these inputs into programmable circuitry to control the positions of the slide member and slide stop. Additional control means senses the occurrence of full load operation and then causes the slide valve member and slide stop member to move as a closed unit in a given direction, or the reverse, as the compressor drive motor current is sensed, continuously seeking the position at which such current is at a minimum.
    • 轴流式螺旋螺杆式压缩机具有滑阀构件和滑动止动构件,其在相互啮合的转子之下端到端安装,使得滑动阀构件控制由转子限定的工作室与壳体到出口和滑块之间的连通 止动构件和阀构件一起控制转子孔的工作流体入口,滑阀构件和滑动止动件可独立移动。 用于滑阀构件和滑动止动件的控制装置包括用于这两个构件的位置检测装置,入口和出口压力检测装置,以及用于将这些输入馈送到可编程电路中以控制滑动构件和滑动挡块的位置的装置。 附加控制装置检测满载操作的发生,然后使滑阀构件和滑动止动构件沿着给定的方向或相反的方式作为闭合单元移动,随着压缩机驱动电动机电流的感测,连续地寻找位置 这种电流是最小的。