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    • 16. 发明授权
    • Line tilt compensation method and apparatus
    • 线倾斜补偿方法和装置
    • US4777648A
    • 1988-10-11
    • US941680
    • 1986-12-15
    • David L. Gardner
    • David L. Gardner
    • H04N7/169H04K1/02
    • H04N7/1696
    • An improved technique for removing line tilt and other types of line rate correlated noise interjected into the active portions of a video signal during transmission and reception of the video signal. The improved technique involves measuring the amplitude of the line rate correlated noise in a received video signal at points sampled across the active portions of a plurality of lines in the video signal. The video lines used for measurement are preferably constant-amplitude dummy video lines inserted into the video signal at the bottom of each video field prior to transmission of the video signal. A complementary line-rate-correlated noise waveform, based on the amplitude measurements, is then generated and summed with the active portions of the received video signal to remove the line rate correlated noise from the video signal.
    • 一种用于在视频信号的发送和接收期间去除视频信号的有效部分中的线倾斜和其他类型的线速相关噪声的改进技术。 改进的技术包括测量在视频信号中的多个行的有效部分上采样的点处的接收视频信号中的线速度相关噪声的幅度。 用于测量的视频线优选是在发送视频信号之前插入到每个视频场的底部的视频信号中的恒定幅度虚拟视频行。 然后基于幅度测量产生互补的线速率相关噪声波形,并将其与接收到的视频信号的有效部分相加,以从视频信号中去除线路速率相关噪声。
    • 17. 发明授权
    • Pipe coating apparatus
    • 管涂装置
    • US4333783A
    • 1982-06-08
    • US180379
    • 1980-08-22
    • David L. Gardner
    • David L. Gardner
    • B28B19/00B65H81/08B65H81/00
    • B28B19/0038B65H81/08
    • Pipe coating apparatus is disclosed. In the preferred and illustrated embodiment, a laterally deployed conveyor belt rotating around a pair of rollers passes beneath the pipe to be coated. Coating material is supplied into a hopper above the belt. The hopper includes positioned slots for receiving reinforcing mesh therein and locates the reinforcing mesh in an extruded ribbon of coating material supported by the conveyor belt and applied to the pipe in helical turns. The application of multiple turns of reinforcing mesh plus shaping of the extruded ribbon enables a thicker layer of coating material to be applied to the pipe, and it is reinforced with multiple layers of reinforcing mesh wire.
    • 公开了管涂装置。 在优选和示出的实施例中,围绕一对辊旋转的横向布置的传送带在待涂覆的管的下方通过。 涂料被送入皮带上方的料斗中。 料斗包括用于在其中接收加强网的定位槽,并将加强网定位在由输送带支撑的挤出的涂层带中,并以螺旋形的方式施加到管。 施加多圈加强网加上挤压带的成型使得能够将更厚的涂层材料施加到管道上,并且通过多层增强网状网加强。