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    • 52. 发明授权
    • Power supply system for a linear motor
    • 线性电机的电源系统
    • US4454457A
    • 1984-06-12
    • US388220
    • 1982-06-14
    • Kiyoshi NakamuraMasayoshi IsakaShigeyoshi Koike
    • Kiyoshi NakamuraMasayoshi IsakaShigeyoshi Koike
    • B60L13/03B60L15/00B60M3/00H02P25/06H02K41/02
    • B60L15/005B60L2200/26Y02T10/645
    • In a linear motor composed of a propelling coil laid on continuously along a track and a field system mounted on a vehicle for driving it, the propelling coil of an enormous length is sectioned into a number of propelling coil units which are connected alternately to two sets of feeders by means of switches, the feeder sets being supplied with polyphase currents from different power converters, respectively. The propelling coil units are connected in series to one another without any interposed insulation and sectioned by a number of lead conductors so that every pair of the adjacent propelling coil units has a common coil portion shared by them and having a length not smaller than that of the vehicle. A pair of the polyphase lead conductors connected to each of the propelling coil units are connected, respectively, to going feeders and return feeders constituting the set of feeders through switches. Change-over of power supply between the adjacent propelling coil units is performed during a period in which the vehicle is running along the common coil section by closing and opening the associated switches and controlling power converters.
    • 在由沿着轨道连续铺设的推进线圈和安装在车辆上用于驱动它的现场系统组成的线性电动机中,将大量长度的推进线圈分成许多推进线圈单元,其交替地连接到两组 的馈线通过开关分别供给来自不同功率转换器的多相电流。 推进线圈单元彼此串联连接,没有任何插入的绝缘并由多个引线导体分段,使得每对相邻的推进线圈单元具有共同的共用线圈部分,并且具有不小于 机动车。 连接到每个推进线圈单元的一对多相引线导体分别通过开关连接到构成该馈线组的进给器和返回馈线。 在相邻的推进线圈单元之间的电源的切换在通过关闭和打开相关联的开关并控制功率转换器的同时沿着公共线圈部分行驶的时段期间执行。
    • 60. 发明授权
    • Hook assembly with coated surfaces for sewing machine
    • 用于缝纫机的带有涂层表面的钩组件
    • US5651323A
    • 1997-07-29
    • US390481
    • 1995-02-17
    • Tokuzo HiroseKiyoshi Nakamura
    • Tokuzo HiroseKiyoshi Nakamura
    • D05B57/16
    • D05B57/16
    • A hook assembly includes a bearing rib on a bobbin case basket or at least a surface layer thereof composed of a synthetic resin, such as a liquid crystal polymer, which has properties such that the amount of the rotating friction generated between such surface layer and an inner surface layer of a groove shaped bearing raceway in which the bearing rib is fitted is lower, with no industrial sewing machine oil therebetween than such industrial sewing machine oil where to be provided therebetween. The hook assembly thus has good durability without any lubrication being provided. Accordingly, oil staining of threads and sewing materials by a lubricant is avoided, and sewing quality is enhanced.
    • 钩组件包括在梭壳篮或至少其表面层上的轴承肋,所述轴承肋由合成树脂(例如液晶聚合物)组成,其具有使得在所述表面层和所述表面层之间产生的旋转摩擦量 其中安装有轴承肋的槽形轴承滚道的内表面层较低,与其间要设置的工业缝纫机油相比,没有工业缝纫机油。 因此,钩组件具有良好的耐久性,而没有提供任何润滑。 因此,避免了通过润滑剂对纱线和缝纫材料的油污染,并且提高了缝纫质量。