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    • 11. 发明授权
    • Document scanner
    • 文件扫描仪
    • US4314159A
    • 1982-02-02
    • US154675
    • 1980-05-30
    • James W. Davis
    • James W. Davis
    • H04N1/04G06K7/015H04N1/00H04N1/06G01N21/30
    • H04N1/00702G06K7/015H04N1/00681H04N1/00718H04N1/00737H04N1/00745H04N1/00753H04N1/06
    • A scanner for scanning a document positioned against a backing surface to determine the position of the document includes photoelectric transducers which provide electrical scan signals in dependence upon the light reflected from the document and from the backing surface at a plurality of moving scan positions as the scan positions move across both the document and the backing surface. A recognizable background image is defined on the document backing surface such that the photoelectric transducers provide a recognizable pattern of scan signals as the document backing surface is scanned, thereby indicating the position of the document. The recognizable background pattern may include a plurality of stripes on the document backing surface with the stripes extending substantially parallel to the direction of movement of the scan positions. Alternatively, the recognizable background pattern may include a plurality of stripes which extend substantially perpendicular to the direction of movement of the scan positions. Alternate ones of the stripes may be black with intermediate ones of the stripes being white. A circuit means may be provided for detecting the recognizable pattern of the scan signals.
    • 用于扫描位于背衬表面上以确定文档位置的文档的扫描器包括光电换能器,其根据从文件反射的光和在多个移动扫描位置处的背衬表面提供电扫描信号,作为扫描 位置移动文档和背面。 在文件背衬表面上定义可识别的背景图像,使得当文档背衬表面被扫描时,光电传感器提供扫描信号的可识别图案,从而指示文档的位置。 可识别的背景图案可以包括文档背衬表面上的多个条纹,条带基本上平行于扫描位置的移动方向延伸。 或者,可识别的背景图案可以包括基本上垂直于扫描位置的移动方向延伸的多个条纹。 条纹中的另一些可以是黑色,中间的条纹是白色的。 可以提供用于检测扫描信号的可识别图案的电路装置。
    • 17. 发明授权
    • Electromagnetic flowmeter with internally placed, laminar flow
supporting, grounding electrodes
    • 内置电磁流量计,层流支撑,接地电极
    • US5728945A
    • 1998-03-17
    • US781352
    • 1997-01-21
    • James W. DavisHerbert A. Shauger, Jr.Gabor E. Vass
    • James W. DavisHerbert A. Shauger, Jr.Gabor E. Vass
    • G01F1/58
    • G01F1/584G01F1/586
    • An electromagnetic flowmeter comprising a body having a central channel having a measuring region, an inlet region and an outlet region. Relative to liquid flow through the central channel, the inlet region is upstream of the measuring region, and the outlet region is downstream of the measuring region. The inlet region and outlet region have diameters substantially greater than the diameter of the measuring region. A transition region extends between the inlet region and the measuring region, and a transition region extends between the measuring region and the outlet region. First and second cavities are respectively positioned in the inlet region and the outlet region, and third and fourth diametrically opposed cavities extend from the measuring region of the central channel. First and second grounding electrodes are respectively positioned in the first and second cavities, and third and fourth measuring electrodes are respectively positioned in the third and fourth cavities.
    • 一种电磁流量计,包括具有具有测量区域,入口区域和出口区域的中心通道的主体。 相对于通过中心通道的液体流动,入口区域在测量区域的上游,并且出口区域在测量区域的下游。 入口区域和出口区域的直径基本上大于测量区域的直径。 过渡区域在入口区域和测量区域之间延伸,并且过渡区域在测量区域和出口区域之间延伸。 第一和第二空腔分别位于入口区域和出口区域中,并且第三和第四直径相对的空腔从中心通道的测量区域延伸。 第一和第二接地电极分别位于第一和第二空腔中,第三和第四测量电极分别位于第三和第四腔中。
    • 18. 发明授权
    • Engine NOx reduction
    • 发动机NOx减少
    • US5609026A
    • 1997-03-11
    • US83657
    • 1993-06-28
    • Lester P. BerrimanJohn M. ZabskyJames W. DavisWilliam M. Hylton
    • Lester P. BerrimanJohn M. ZabskyJames W. DavisWilliam M. Hylton
    • F01N3/20F01N3/36F02B1/04F01N3/28
    • F01N3/2066F01N3/36F01N2610/02F01N2610/1453F02B1/04Y02T10/24
    • A method and apparatus are provided for reducing pollutants and especially nitrogen oxides, or NOx, in the exhaust gases of an engine. The apparatus includes a device for injecting ammonia into a conduit that extends between cylinder exhaust valves and a catalytic converter, to mix the ammonia with the exhaust gases. Ammonia injection occurs at a location a plurality of inches downstream of the exhaust valves to avoid burning of the ammonia by flames. The injection preferably occurs at a location where the exhaust gases are at a temperature of at least about 1200.degree. F. to cause considerable reaction of the ammonia with NOx in the exhaust gases prior to the gases reaching the catalyst, so less NOx must be removed along the catalyst. To minimize ammonia use, it is injected only for a limited period such as a minute after a cold engine is started when the catalyst is too cold to cause significant reactions, and during operation of the engine at high power levels when the greatest amounts of NOx are produced.
    • 提供了一种用于减少发动机废气中的污染物,特别是氮氧化物或NOx的方法和装置。 该装置包括用于将氨注入到在气缸排气阀和催化转化器之间延伸的导管中以将氨与废气混合的装置。 氨喷射发生在排气门下游多个英寸的位置,以避免由于火焰而燃烧氨。 注射优选在排气处于至少约1200°F的温度的位置处发生,以在气体到达催化剂之前使氨与废气中的NOx发生相当大的反应,因此必须除去较少的NO x 沿催化剂。 为了最大限度地减少氨的使用,只有在发动机冷启动后几分钟才能注入有限的时间,当催化剂太冷而不能引起显着的反应时,并且在最大量的NOx 被生产。
    • 20. 发明授权
    • In-line disinfectant contactor
    • 在线消毒接触器
    • US4333833A
    • 1982-06-08
    • US903596
    • 1978-05-08
    • Karl E. LongleyBrian RatiganJames W. Davis
    • Karl E. LongleyBrian RatiganJames W. Davis
    • C02F1/68C02F1/76
    • C02F1/763C02F1/686Y10S261/75Y10S423/09Y10T137/87587
    • An in-line contactor adapted to bring about intimate contact between a disinfectant and a wastewater stream to produce a reaction between the disinfectant and pathogens effecting kills in a manner minimizing unwanted side effects. The wastewater stream is pumped through the successive stages of the contactor, the first of which is an input section having a converging nozzle that projects the stream at high velocity into a throat. The throat feeds the stream in a highly turbulent state through a mixing section, the resultant vacuum created within the throat acting to draw a disinfectant such as aqueous or gaseous chlorine from a disinfectant supply into the mixing section where it is thoroughly intermingled with the turbulent stream before the stream is discharged from the contactor through a diverging pressure-recovery output section.
    • 一种在线接触器,适于在消毒剂和废水流之间产生紧密接触,从而以消除不希望的副作用的方式产生消毒剂和致病菌之间的反应。 废水流被泵送通过接触器的连续阶段,其中第一个是具有会聚喷嘴的输入部分,其将流以高速投射到喉部。 咽喉通过混合部分以高度湍流的状态进料流,在喉部内产生的所得真空用于将来自消毒剂供应源的消毒剂(例如水或气态氯)从消毒剂供应物抽入混合部分,在该混合部分与湍流充分混合 在流从接触器通过发散压力恢复输出部分排出之前。