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    • 1. 发明专利
    • A Process for Producing Indurated Compounds from Lac or its Derivatives.
    • GB127825A
    • 1920-10-07
    • GB1400819
    • 1919-06-02
    • SIMONSON WILLIAM WESLEYBLAIR LEWIS VAN DEVENTER
    • SIMONSON WILLIAM WESLEYBLAIR LEWIS VAN DEVENTER
    • C09F1/00
    • 127,825. Simonson, W. W., and Blair, L. van D. June. 1, 1918, [Convention date]. Resins and resinous compounds.-In a process for indurating and toughening lacs and lac derivatives, the natural lac is freed from impurities and then rendered wax-free by treatment in a usual manner with hot caustic soda, kaolin being used as a clarifying agent. Induration is effected by mixing the clarified solution, having no free caustic soda, with lead acetate and sufficient water to precipitate in flakes a shellac-lead compound which, when washed and dried, is an indurated product. To obtain a tough and further indurated product, this shellac-lead compound is heated and fused and, if applied to an article in a fused state and heated, will adhere strongly thereto. Heating after fusion eliminates water, produces polymerization or condensation, and increases the viscosity of the fused, and adherence of the solidified compound. The shellac-lead compound may be mixed with wax-free shellac obtained by treating the clarified caustic soda solution with hydrochloric acid, and the mixture subjected to heat as described, the temperature of fusion of the mixture being varied by varying the proportions of the components and by the substitution of different metals for lead in the metallic derivative. Barium, calcium, magnesium, zinc, and other metals may be substituted for lead. When a product having a low initial fusion temperature is desired, a lac without a metallic substitution may be subjected to the thermal process as described. The fluency of the compound may be varied by introducing inert substances such as talc and calcium sulphate. Charcoal may also be added to shorten the time necessary to secure the desired induration. The shellac-metal compound may be prepared by dissolving the shellac in alcohol or acetone, adding the desired metal hydrate, and evaporating the solvent. The indurated product either before or after having been fused, may be mixed with a solvent and applied as a varnish. Reference has been directed by the Comptroller to Specification 16800/04.
    • 5. 发明授权
    • Automated farm turnout
    • 自动农场投票
    • US06427718B1
    • 2002-08-06
    • US09729713
    • 2000-12-06
    • Blair Lewis StringamClifford Alan Pugh
    • Blair Lewis StringamClifford Alan Pugh
    • E03B728
    • A01G25/16E02B13/02G01F1/002G01F23/00Y10T137/7306Y10T137/7761
    • An automated turnout system is provided for controlling water flow through a turnout gate. The system determines the water flow parameters of the open channel and adjusts the size of the gate opening accordingly. The turnout system includes a flow measurement structure such as weir or flume, a water level sensor for measuring the water level at the flow measurement structure, a flow control gate, an actuator for adjusting the gate and a position sensor for determining the gate setting. A controller determines the proper gate setting based on inputs from the water level sensor and position sensor. The system provides a low cost, practical way to control outflow under varying canal water levels so as to improve irrigation operations.
    • 提供了一种自动投票系统,用于控制通过投票口的水流。 该系统确定开放通道的水流参数,并相应地调整闸门开口的尺寸。 投票系统包括诸如堰或水槽的流量测量结构,用于测量流量测量结构处的水位的水位传感器,流量控制门,用于调节门的致动器和用于确定门设置的位置传感器。 控制器基于来自水位传感器和位置传感器的输入确定正确的门设置。 该系统提供了一种低成本,实用的方式来控制不同运河水位下的流出,从而改善灌溉作业。