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    • 22. 发明授权
    • Method and apparatus for determining resistance at radio frequencies
    • 用于确定无线电频率电阻的方法和装置
    • US3987390A
    • 1976-10-19
    • US465393
    • 1974-04-29
    • Charles A. KirklenCharles F. Rhodes, Jr.
    • Charles A. KirklenCharles F. Rhodes, Jr.
    • G01R27/02
    • G01R27/02
    • The radio frequency resistance between a pair of conductive elements, for example, adjacent pipe sections of a pipeline, which are coupled together through an insulator, may be determined by contacting each pipe section with one of a pair of probes or electrodes connected across the output of a radio frequency oscillator which is coupled to the input of a rectifier and filter circuit. The probes are connected across the oscillator output through a resistor which insures that the direct current output of the rectifier is directly proportional to the RF resistance between the pipe sections. The output of the rectifier is coupled to a meter through an operational amplifier. The meter, which provides a direct readout of the resistance being measured, may be provided with a current limiting circuit which protects the meter from excessive DC current. Calibrating means may be provided to enable adjustment of the gain of the operational amplifier for resistance readings within several ranges.
    • 通过绝缘体耦合在一起的一对导电元件(例如,管道的相邻管段)之间的射频电阻可以通过使每个管段与跨过输出连接的一对探针或电极之一接触来确定 射频振荡器耦合到整流器和滤波器电路的输入端。 探头通过电阻器连接在振荡器输出端,确保整流器的直流输出与管段之间的RF电阻成正比。 整流器的输出通过运算放大器耦合到仪表。 提供了被测量电阻的直接读出的仪表可以设置有限流电路,该电流限制电路可保护仪表免受过大的直流电流的影响。 可以提供校准装置,以便能够在几个范围内调整运算放大器的电阻读数的增益。
    • 23. 发明授权
    • Rubber containing acid-treated oils and its preparation
    • 含有酸处理油的橡胶及其制备方法
    • US3985701A
    • 1976-10-12
    • US657438
    • 1967-05-29
    • Abraham SchneiderArchibald P. Stuart
    • Abraham SchneiderArchibald P. Stuart
    • C08K5/01C10G17/02
    • C10G17/07C08K5/01
    • A novel oil-containing rubber composition is prepared by admixing a rubber from the group consisting of natural rubber, homopolymers of conjugated diolefins, and copolymers of conjugated diolefins with ethylenically unsaturated monomers, with mineral oil having at least 10 weight percent aromatic compounds which has been obtained byA. mixing a mineral oil starting material with an acidic reagent comprising anhydrous hydrogen fluoride in amount from 10 to 40 percent by weight of said starting material; thereby to form an acid phase insoluble in said mineral oil and containing components extracted from said starting material, and an oil phase comprising unextracted components of said starting material and containing dissolved acidic material,B. separating said acid phase from said oil phase,C. mixing said oil phase with an alkaline reagent to neutralize said dissolved acidic material and form neutralization products, andD. separating said neutralization products from said oil phase.
    • 通过将来自天然橡胶,共轭二烯烃的均聚物和共轭二烯烃与烯属不饱和单体的共聚物的橡胶与至少10重量%的芳族化合物的矿物油混合来制备新的含油橡胶组合物, 通过A.将矿物油起始材料与含有氢氟酸的酸性试剂混合,从起始材料重量的10至40% 在含有矿物油和含有起始物质的组分的组分中形成酸相,以及包含起始材料和含有溶解的酸性物质的未经处理的组分的油相,B.从所述油相分离所述酸相。 将上述油相与碱性试剂混合以使中性溶解的酸性物质和形式的中和产物中和,以及D.从所述油相分离所述中和产物。
    • 24. 发明授权
    • Method and apparatus for assembly of a modular barge
    • 用于组装模块化的方法和装置
    • US3983830A
    • 1976-10-05
    • US584325
    • 1975-06-06
    • George W. Morgan
    • George W. Morgan
    • B63B3/08B63B35/28B63B35/36
    • B63B35/28B63B3/08B63B35/36
    • A method of and apparatus for the construction of a modular barge is provided wherein individual floatation modules are assembled and secured one to another by the positioning and linking of separable alignment pins therebetween and the threading of tensioning cables therethrough. Each alignment pin has a generally elliptoid shape and an axial cable receiving bore therethrough. Each flotation module is formed with a plurality of sockets complementally shaped for the alignment pins and linked in pairs by transversely extending passages therethrough and spaced along adjacent side walls of the modules to be in registry with one another. With the modules in a spaced array, assembly cables are threaded through certain ones of the module passages. First ends of the cables are anchored to perimeter modules and the opposite ends are tensioned to draw the modules and alignment pins together, wherein the configuration of the alignment pins then facilitates alignment and coupling. A lock provided in each socket and alignment pin secure that coupled relationship. Tensioning cables threaded serially through certain other ones of the module passages and alignment pins provide structural rigidity for the barge through the post tensioning thereof.
    • 28. 发明授权
    • Conveyor belts for transporting tar sands
    • 用于输送焦油砂的输送带
    • US3963113A
    • 1976-06-15
    • US606150
    • 1975-08-20
    • Jackson S. Boyer
    • Jackson S. Boyer
    • B65G15/32B65G15/36B65G15/30
    • B65G15/32B65G15/36B65G2201/04Y10T428/24132Y10T428/249936Y10T428/31692
    • A method for transporting tar sands in an open pit mine utilizing novel flexible belt conveyors between a receiving area and a discharge area which comprises providing a conveyor belt having an upper surface layer of a novel elastomeric material which is flexible at low temperatures and is substantially resistant to excess swelling when exposed to petroleum liquids containing up to 30 volume percent aromatics at temperatures in the range of -60.degree.F to +100.degree.F, applying a thin layer of said petroleum liquid to the surface of said belt and thereafter transferring tar sands on said belt from a receiving area to a discharge area.
    • 在接收区域和排放区域之间利用新的柔性带式输送机在露天矿井中输送焦油砂的方法,该方法包括提供具有新的弹性体材料的上表面层的传送带,所述弹性体材料的上表面层在低温下是柔性的并且基本上是抗性的 当在-60°F至+ 100°F的温度范围内暴露于含有高达30体积%芳族化合物的石油液体时,过量膨胀,将薄层所述石油液体施加到所述带的表面,然后转移焦油砂 在所述带上从接收区到排放区。
    • 30. 发明授权
    • Method and apparatus for placing foamed plugs
    • 用于放置发泡塞的方法和装置
    • US3956439A
    • 1976-05-11
    • US525332
    • 1974-11-20
    • William B. Hansel
    • William B. Hansel
    • F16L55/10B29D27/04
    • F16L55/10
    • For manipulating a length of non-rigid tubing into position around a swing joint (which includes a 90.degree. fitting) in an underground pipe, a rigid guide tube (through which the non-rigid tubing may be passed) is utilized. The lower end of this guide tube is landed in the 90.degree. fitting, and a wedging member or whipstock, manipulatable from the surface, is operated to hold this end of the guide tube solidly in position in the 90.degree. fitting. After the guide tube is thus secured, the non-rigid tubing is passed down through the guide tube and around the 90.degree. fitting into a laterally-extending pipe; then, a foam-forming composition is pumped through the non-rigid tubing into this latter pipe to form a foamed plug therein.
    • 为了将一段长度的非刚性管道操纵在地下管道中的摆动接头(其包括90°接头)周围的位置,使用刚性导管(非刚性管道可以穿过该导管)。 该引导管的下端落在90度配件中,并且可操作从表面操作的楔形构件或造斜器,以将导管的这一端牢固地保持在90度配件中的适当位置。 在引导管如此固定之后,非刚性管通过引导管向下通过并且在90度附近装配到横向延伸的管中; 然后,将泡沫形成组合物通过非刚性管道泵送到后一个管道中以在其中形成发泡塞子。