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    • 1. 发明授权
    • Optical waveguide vapor sensor
    • 光波导蒸汽传感器
    • US5315673A
    • 1994-05-24
    • US848240
    • 1992-03-09
    • Joseph R. StetterG. Jordan MaclayDavid S. Ballantine, Jr.
    • Joseph R. StetterG. Jordan MaclayDavid S. Ballantine, Jr.
    • G01N21/77G01N21/78G01N21/81G02B6/02
    • G01N21/7703G01N2021/773G01N21/783G01N21/81
    • An optical waveguide sensor for the detection of acid vapors comprises a chemically sensitive reagent coating of bromothymol blue or thymol blue indicator suspended in a Nafion polymer film. The sensor uses a 562-nm light-emitting diode source and a phototransistor detector. The response to HCl and H.sub.2 S vapors is both rapid and reversible, with an estimated detection limit for H.sub.2 S of less than 15 ppmv (parts per million by volume). The sensor exhibits generalized response to protonic acid vapors, but does not produce an indicator response to CO.sub.2, even at large concentrations (60 volume-%) in the presence of water vapor. The sensor exhibits a systematic interference from water vapor which may be corrected by a differential approach, either using a reference sensor (Nafion without an indicator) or by monitoring the sensor responses at two wavelengths.
    • 用于检测酸性蒸气的光波导传感器包括悬浮在Nafion聚合物膜中的溴百里酚蓝或百里酚蓝指示剂的化学敏感性试剂涂层。 该传感器使用562nm发光二极管源和光电晶体管检测器。 对HCl和H2S蒸气的反应是快速和可逆的,H2S的估计检测限低于15ppmv(按体积计百万分之一)。 该传感器对质子酸蒸气表现出广泛的反应,但在水蒸气存在下,即使在大的浓度(60体积%)下也不会产生对二氧化碳的指示剂反应。 该传感器表现出来自水蒸气的系统干扰,可以通过差分方法校正,无论是使用参考传感器(Nafion无指示器)还是通过监测两个波长的传感器响应。
    • 4. 发明授权
    • Chemical sensing apparatus and methods
    • 化学传感装置及方法
    • US5512882A
    • 1996-04-30
    • US741573
    • 1991-08-07
    • Joseph R. StetterG. Jordan Maclay
    • Joseph R. StetterG. Jordan Maclay
    • G01N27/02G01N27/12G08B17/10
    • G01N27/126
    • Apparatus for the detection of a vapor of a selected chemical substance includes a sensor whose impedance changes upon exposure to such a vapor. The sensor comprises a polymer whose physical structure is altered by the vapor, e.g., through expansion or disintegration, and electrically conductive elements that are interspersed with or separated by the polymer. The interspersed elements may consist of a fine powder of carbon or of a metal in a matrix of silicone or other vapor-sensitive polymer. The electrical contacts between the powder particles are weakened when the polymer swells or disintegrates, which results in increased resistance. Alternatively, the capacitance between two conductive layers separated by a polymer layer decreases, and hence the impedance increases, when the polymer swells upon exposure to the vapor. In yet another embodiment, the polymer exerts a stress on a piezoresistive element and the stress is increased when the polymer swells, which causes a further increase in resistance. The changes are measured by an impedance-measuring circuit, such as a Wheatstone bridge.
    • 用于检测所选化学物质的蒸汽的装置包括一种传感器,其在暴露于这种蒸气时其阻抗发生变化。 传感器包括其物理结构被蒸气改变的聚合物,例如通过膨胀或分解,以及与聚合物分散或分离的导电元件。 散在的元素可以由硅或者其它气敏聚合物的基质中的碳或金属的细粉末组成。 当聚合物溶胀或分解时,粉末颗粒之间的电接触被削弱,这导致增加的电阻。 或者,当聚合物在暴露于蒸气时膨胀时,由聚合物层分离的两个导电层之间的电容降低,并且因此阻抗增加。 在另一个实施方案中,聚合物在压阻元件上施加应力,并且当聚合物膨胀时应力增加,这导致电阻的进一步增加。 这些变化由诸如惠斯通电桥之类的阻抗测量电路来测量。
    • 5. 发明授权
    • Techniques for calculating gas concentrations in a fluid environment
    • 用于计算流体环境中气体浓度的技术
    • US09267929B2
    • 2016-02-23
    • US13607079
    • 2012-09-07
    • Vikas LakhotiaG. Jordan Maclay
    • Vikas LakhotiaG. Jordan Maclay
    • G01N27/12G01N33/00
    • G01N33/005G01N27/123G01N33/0059
    • A method can be performed by adjusting a temperature of a gas sensor to a first temperature value for a first period of time and a second temperature value for a second period of time. The gas sensor signal may be measured during the first period of time to determine a first signal value and during the second period of time to determine a second value. Then, concentration information for at least one gas is calculated according to the first signal value and the second signal value. While the gas sensor signal may include information about a presence of a first gas and a second gas, the concentration information for the at least one gas may not substantially include concentration information for the second gas.
    • 可以通过将气体传感器的温度调节到第一时间段的第一温度值和第二时间段的第二温度值来执行方法。 可以在第一时间段期间测量气体传感器信号以确定第一信号值,并且在第二时间段期间确定第二值。 然后,根据第一信号值和第二信号值计算至少一种气体的浓度信息。 虽然气体传感器信号可以包括关于第一气体和第二气体的存在的信息,但是至少一种气体的浓度信息可能基本上不包括第二气体的浓度信息。
    • 6. 发明授权
    • Adjustable wrench
    • 活动扳手
    • US4324160A
    • 1982-04-13
    • US213870
    • 1980-12-08
    • G. Jordan Maclay
    • G. Jordan Maclay
    • B25B13/10B25B13/58
    • B25B13/10B25B13/107
    • The open ended wrench includes a manually graspable handle and a nut-seizing jaw formation connected to the handle. The jaw formation has a nut-receiving opening therein defined between an upper jaw member, a lower jaw member spaced a fixed distance from the upper jaw member and a jaw back portion extending between the upper and lower jaw members. A slot communicates with the opening and extends through the jaw back portion. A plurality of substantially equal length shims are longitudinally slidable through the slot from a location outside of the opening to a location inside of the opening to provide a variable dimension for the nut-receiving opening. Each of the shims has an interlock formation for preventing any shim from being located inside of the opening unless there is supportive contact with the jaw. In one embodiment, each shim has one end thereof formed with an offset end portion including an inclined section extending angularly from the plane of the shim and an end section extending from the inclined section. The offset end portion defines the interlock formation. In another embodiment, some of the shims are from a first group of shims which are rolled from stock having a first thickness dimension and some of the shims are from a second group of shims having a second thickness dimension slightly larger than the first thickness dimension. Each group of shims has essentially the same tolerance range, whereby nesting and stacking of said two groups of shims having different basic thickness dimensions is facilitated. Also, the wrench includes a manually manipulatable releasable locking assembly for releasably locking the shims in a desired position against the upper jaw member.
    • 开口扳手包括一个可手动抓握的手柄和一个连接到手柄上的止动卡爪。 颚形结构在其中限定有上钳口构件,与上颚构件间隔开固定距离的下钳口构件和在上颚构件和下颚构件之间延伸的颚爪部分之间的螺母接收开口。 槽与开口连通并延伸通过夹爪后部。 多个基本上相等的长度的垫片可以从开口外部的位置纵向滑动穿过狭槽,到开口内部的位置,以为螺母接收开口提供可变的尺寸。 每个垫片具有互锁结构,用于防止任何垫片位于开口内部,除非与钳口有支撑接触。 在一个实施例中,每个垫片的一端形成有偏移端部分,该偏移端部分包括从垫片的平面成角度延伸的倾斜部分和从倾斜部分延伸的端部部分。 偏置端部限定互锁结构。 在另一个实施例中,一些垫片来自第一组垫片,该第一组垫片从具有第一厚度尺寸的坯料卷起,并且一些垫片来自具有稍大于第一厚度尺寸的第二厚度尺寸的第二组垫片。 每组垫片具有基本上相同的公差范围,从而便于具有不同基本厚度尺寸的所述两组垫片的嵌套和堆叠。 而且,扳手包括一个手动可操纵的可释放的锁定组件,用于将垫片可释放地锁定在抵靠上钳口构件的期望位置。
    • 7. 发明申请
    • Techniques For Calculating Gas Concentrations in a Fluid Environment
    • 在流体环境中计算气体浓度的技术
    • US20130086975A1
    • 2013-04-11
    • US13607079
    • 2012-09-07
    • Vikas LakhotiaG. Jordan Maclay
    • Vikas LakhotiaG. Jordan Maclay
    • G01N33/00
    • G01N33/005G01N27/123G01N33/0059
    • A method can be performed by adjusting a temperature of a gas sensor to a first temperature value for a first period of time and a second temperature value for a second period of time. The gas sensor signal may be measured during the first period of time to determine a first signal value and during the second period of time to determine a second value. Then, concentration information for at least one gas is calculated according to the first signal value and the second signal value. While the gas sensor signal may include information about a presence of a first gas and a second gas, the concentration information for the at least one gas may not substantially include concentration information for the second gas.
    • 可以通过将气体传感器的温度调节到第一时间段的第一温度值和第二时间段的第二温度值来执行方法。 可以在第一时间段期间测量气体传感器信号以确定第一信号值,并且在第二时间段期间确定第二值。 然后,根据第一信号值和第二信号值计算至少一种气体的浓度信息。 虽然气体传感器信号可以包括关于第一气体和第二气体的存在的信息,但是至少一种气体的浓度信息可能基本上不包括第二气体的浓度信息。
    • 8. 发明授权
    • Techniques for calculating gas concentrations in a fluid environment
    • 用于计算流体环境中气体浓度的技术
    • US08265881B1
    • 2012-09-11
    • US13269368
    • 2011-10-07
    • Vikas LakhotiaG. Jordan Maclay
    • Vikas LakhotiaG. Jordan Maclay
    • G01N27/26G06F17/40
    • G01N33/005G01N27/123G01N33/0059
    • A temperature of a gas sensor may be adjusted to a first temperature value for a first period of time and a second temperature value for a second period of time. A signal of the gas sensor may be measured during the first period of time to determine a first signal value and during the second period of time to determine a second value. Then, concentration information for at least one gas is calculated according to the first signal value and the second signal value. While the gas sensor signal may include information about a presence of a first gas and a second gas, the concentration information for the at least one gas may not substantially include concentration information for the second gas.
    • 气体传感器的温度可以在第一时间段内被调节到第一温度值,并且可以在第二时间段内被调节到第二温度值。 可以在第一时间段期间测量气体传感器的信号以确定第一信号值,并且在第二时间段期间确定第二值。 然后,根据第一信号值和第二信号值计算至少一种气体的浓度信息。 虽然气体传感器信号可以包括关于第一气体和第二气体的存在的信息,但是至少一种气体的浓度信息可能基本上不包括第二气体的浓度信息。