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    • 64. 发明授权
    • Antenna
    • 天线
    • US06873295B2
    • 2005-03-29
    • US10341602
    • 2003-01-14
    • John Davies
    • John Davies
    • H01Q1/12H01Q1/32
    • H01Q1/1278
    • A radio antenna formed on a window pane includes parallel heating elements extending between busbars at opposite edges of the pane. Plural interconnecting elements extend across the heating elements. The length from the midpoint of a busbar to the point of connection of the interconnecting element, measured along the busbar and then along the heating element, is approximately λ/4+N(λ/2), where n is an integer greater than or equal to zero, and λ is a select wavelength from the band of signals to be received.
    • 形成在窗玻璃上的无线电天线包括在窗格的相对边缘处的母线之间延伸的平行加热元件。 多个互连元件跨越加热元件延伸。 从母线的中点到沿着母线测量的然后沿着加热元件测量的互连元件的连接点的长度近似为λ/ 4 + N(λ/ 2),其中n是大于或等于 等于零,并且λ是从要接收的信号的频带的选择波长。
    • 66. 发明授权
    • Electronic article security system employing variable time shifts
    • 采用可变时间偏移的电子物品安全系统
    • US06249229B1
    • 2001-06-19
    • US09374655
    • 1999-08-16
    • Eric EcksteinJohn DaviesEdwin HoptonNimesh ShahBent Svendsen
    • Eric EcksteinJohn DaviesEdwin HoptonNimesh ShahBent Svendsen
    • G08B1314
    • G08B13/2482G08B13/2488
    • A pulse-listen electronic article security (EAS) system for detecting the presence of a security tag within a detection zone is disclosed. The EAS system includes a transmitter for radiating a first electromagnetic signal into the detection zone. The first electromagnetic signal is a time sequence of RF bursts emitted during each of a plurality of contiguous frame intervals in which the duration of each of the frame intervals is one of a plurality of different values. The EAS system also includes a receiver synchronized with the transmitter for receiving a second electromagnetic signal re-radiated from a security tag in the detection zone in response to the first electromagnetic signal. The receiver provides an output signal if a security tag is detected. The values of the plurality of the frame interval durations are selected to be different from the values of frame interval durations of other EAS systems thereby rendering the EAS system substantially free of false alarms or blockages caused by the operation of other EAS systems.
    • 公开了一种用于检测检测区内的安全标签的存在的脉冲收听电子物品安全(EAS)系统。 EAS系统包括用于将第一电磁信号辐射到检测区域的发射器。 第一电磁信号是在多个相邻帧间隔中的每一个期间发射的RF突发的时间序列,其中每个帧间隔的持续时间是多个不同值之一。 EAS系统还包括与发射机同步的接收机,用于响应于第一电磁信号接收从检测区域中的安全标签重新辐射的第二电磁信号。 如果检测到安全标签,则接收器提供输出信号。 多个帧间隔持续时间的值被选择为与其他EAS系统的帧间隔持续时间的值不同,从而使EAS系统基本上没有由其他EAS系统的操作引起的假警报或阻塞。
    • 67. 发明授权
    • Method and apparatus for producing stretched yarns
    • 用于生产拉伸纱线的方法和设备
    • US5643515A
    • 1997-07-01
    • US455118
    • 1995-05-31
    • John Davies
    • John Davies
    • D01D5/16D01F6/62D02J1/22D02G1/16
    • D01D5/16D01F6/62
    • A method and apparatus for producing stretched yarns. PET yarns composed of a plurality of continuous and substantially fully stretched individual filaments are made by melt spinning and stretching them in an integral process having the steps of (a) simultaneous extrusion of the individual filaments for forming at least eight continuous filament strands of at least about ten filaments for solidification of the filaments; (b) arranging the filaments to form a planar array of parallel and mutually distanced strands; (c) together pre-stretching the filaments by passing the strands in frictional contact with peripheral surface portions of a first and second rotating draw cylinder having parallel axes of rotation and operated at different speeds for achieving a pre-draw rate of from about 5 to about 20% of the fully stretched state, each strand passing over the surface portions along a discrete path which is defined by a plane intersecting perpendicularly with the axes of rotation of the draw cylinders; (d) continuously applying an aqueous lubricant having the temperature of at least about 50.degree. C. to produce a continuous film of lubricant on each filament; and (e) passing the strands in contact with the peripheral surface portions of at least two additional rotating draw cylinders having an axes of rotation parallel to the first and second rotating draw cylinders and operating at differing speeds for achieving full stretch of the filaments.
    • 拉伸纱线的制造方法和装置。 由多个连续且基本上完全拉伸的单丝组成的PET纱线通过熔融纺丝制成,并以整体方法拉伸,其步骤为(a)同时挤出单丝以至少形成至少八根连续的细丝丝 约十根长丝用于固化长丝; (b)布置所述长丝以形成平行和相互间隔的股线的平面阵列; (c)通过使所述线束与具有平行旋转轴线的第一和第二旋转拉伸圆筒的周向表面部分摩擦接触来一起预拉伸长丝,并以不同的速度操作,以实现约5至 大约是完全拉伸状态的20%,每根股线沿着与垂直于拉伸圆筒的旋转轴线垂直相交的平面限定的离散路径越过表面部分; (d)连续施加温度为至少约50℃的水性润滑剂,以在每根细丝上产生连续的润滑剂膜; 以及(e)使所述股线与至少两个额外的旋转牵引缸的外周表面部分接触,所述另外的旋转牵引缸具有平行于所述第一和第二转动拉伸缸的旋转轴线,并以不同的速度操作以实现全长拉伸。