知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

19 条记录 (耗时 0.02 秒)

    Regulated current source for thermal printhead
    1.
    发明授权
    Regulated current source for thermal printhead 失效
    热敏打印头的电流源

    公开(公告)号：US4434356A

    公开(公告)日：1984-02-28

    申请号：US452346

    申请日：1982-12-22

    申请人： Timothy P. Craig ,  John W. Pettit ,  Michael R. Timperman

    发明人： Timothy P. Craig ,  John W. Pettit ,  Michael R. Timperman

    IPC分类号： B41J2/35 ,  G05F1/56 ,  B41J3/20

    CPC分类号： B41J2/35 ,  Y10T307/305 ,  Y10T307/352

    摘要： A current-drive circuit (FIG. 1) is provided to drive each of forty electrodes 41. Voltage at the electrodes 41 is monitored on line 49 as a control-input to a voltage-regulator circuit (FIG. 2), to produce the drive voltage Vdr. Vdr minus a current-level reference Vlev is applied as the input of a differential amplifier (transistors 3, 15, 51 and 53), thereby applying Vdr-Vlev on line 27. A constant current through the electrode 41 is produced across register 25. As the lowest voltage at all driven electrodes shifts, the regulator circuit (FIG. 2) shifts Vdr the same amount, employing differentially connected transistors 72 and 74, and Zener 120 to set the level of Vdr. Since most of the active elements operated within narrow limits, the circuit can be extensively miniaturized.

    摘要翻译： 提供电流驱动电路（图1）以驱动四十个电极41中的每一个。电极41上的电压作为对稳压器电路（图2）的控制输入在线路49进行监视，以产生 驱动电压Vdr。 Vdr减去电流电平参考Vlev作为差分放大器（晶体管3,15,51和53）的输入，由此在线27上施加Vdr-Vlev。通过电极41的恒定电流跨越寄存器25产生。 随着所有驱动电极的最低电压偏移，调节器电路（图2）使用差分连接的晶体管72和74以及齐纳二极120来设定Vdr的电平来使Vdr移动相同的量。 由于大多数有源元件在窄限制范围内工作，电路可以被广泛地小型化。

    High-reliability optical fiber having a nanocomposite coating
    2.
    发明授权
    High-reliability optical fiber having a nanocomposite coating 有权
    具有纳米复合涂层的高可靠性光纤

    公开(公告)号：US08218930B2

    公开(公告)日：2012-07-10

    申请号：US11397933

    申请日：2006-04-05

    申请人： John W. Pettit

    发明人： John W. Pettit

    IPC分类号： G02B6/00 ,  G02B6/36

    CPC分类号： C03C25/104 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C03C25/1062 ,  G02B6/02395 ,  Y10T428/2933

    摘要： An optical fiber is coated with a super-hydrophobic carbon nanotube film, or other film containing a nanocomposite material, to increase reliability. The film is formed from a carbon nanotube dispersion, which is in turn formed from a mixture of water, carbon nanotube gel, and a polymer such as single stranded DNA of a repeating sequence of the base pairs GT with a length of 20 base pairs, which is sonicated and then ultracentrifuged.

    摘要翻译： 光纤被超疏水性碳纳米管膜或其他含有纳米复合材料的膜涂覆以提高可靠性。 该膜由碳纳米管分散体形成，该碳纳米管分散体又由水，碳纳米管凝胶和长度为20碱基对的碱基对GT的重复序列的单链DNA的聚合物形成， 将其超声处理，然后超速离心。

    DNA analyzer
    3.
    发明申请
    DNA analyzer 审中-公开
    DNA分析仪

    公开(公告)号：US20110070578A1

    公开(公告)日：2011-03-24

    申请号：US12659488

    申请日：2010-03-10

    申请人： H. Randall Bell ,  Abby MacKness ,  Joan Bienvenue ,  John W. Pettit ,  James P. Landers

    发明人： H. Randall Bell ,  Abby MacKness ,  Joan Bienvenue ,  John W. Pettit ,  James P. Landers

    IPC分类号： C12Q1/68 ,  C12M1/00

    CPC分类号： B01L3/502753 ,  B01L7/525 ,  B01L2300/0816 ,  B01L2300/087 ,  B01L2400/0421 ,  G01N27/44791 ,  G01N29/32 ,  G01N2021/4186

    摘要： Aspects of the disclosure provide a microfluidic chip to facilitate DNA analysis. The microfluidic chip includes a first domain configured for polymerase chain reaction (PCR) amplification of DNA fragments, a dilution domain coupled to the first domain to dilute a PCR mixture received from the first domain, and a second domain that is coupled to the dilution domain so as to receive the amplified DNA fragments. The second domain includes a separation channel that is configured to perform electrophoretic separation of the amplified DNA fragments. In addition, the disclosure provides a DNA analyzer to act on the microfluidic chip to perform an integrated single chip DNA analysis.

    摘要翻译： 本公开的方面提供了用于促进DNA分析的微流体芯片。 微流体芯片包括构建用于DNA片段的聚合酶链式反应（PCR）扩增的第一结构域，与第一结构域偶联的稀释结构域以稀释从第一结构域接收的PCR混合物，以及偶联至稀释结构域的第二结构域 以便接收扩增的DNA片段。 第二结构域包括被配置为进行经扩增的DNA片段的电泳分离的分离通道。 此外，本公开提供了一种DNA分析仪来作用于微流体芯片以进行集成的单芯片DNA分析。

    Solid state infrared gauge
    4.
    发明授权
    Solid state infrared gauge 失效
    固态红外测温仪

    公开(公告)号：US5821536A

    公开(公告)日：1998-10-13

    申请号：US978133

    申请日：1997-11-25

    申请人： John W. Pettit

    发明人： John W. Pettit

    IPC分类号： G01J3/12 ,  G01N21/35 ,  G01N21/86

    CPC分类号： G01J3/1256 ,  G01N21/3559

    摘要： A solid state moisture gauge is disclosed in which a quartz-halogen bulb is used with an acousto-optic tunable filter to launch light of specific desired wavelengths into a parallel plate cavity device which contains or is adjacent to material having a moisture content which is to be measured. The light exiting from the parallel plate device is detected, converted to a digital signal and then stored in a computer for later comparison to the detection of light exiting from the parallel plate device of a different wavelength.

    摘要翻译： 公开了一种固态湿度计，其中石英卤素灯泡与声光可调谐滤光器一起使用以将特定期望波长的光发射到平行板空腔装置中，该平行板腔装置包含或邻近具有水分含量的材料 被测量。 从平行板装置出射的光被检测，转换为数字信号，然后存储在计算机中，以便与从不同波长的平行板装置出射的光的检测进行比较。

    Method for detecting and measuring a secondary material intermittently deposited to a moving substrate
    7.
    发明授权
    Method for detecting and measuring a secondary material intermittently deposited to a moving substrate 失效
    用于检测和测量间歇地沉积到移动衬底上的次级材料的方法

    公开(公告)号：US07116750B1

    公开(公告)日：2006-10-03

    申请号：US11004277

    申请日：2004-12-02

    申请人： Michael Iaquinta ,  David Pond ,  John W. Pettit

    发明人： Michael Iaquinta ,  David Pond ,  John W. Pettit

    IPC分类号： G01N23/06

    CPC分类号： G01N23/06

    摘要： A method for detecting and measuring regions of a secondary material deposited onto a moving substrate. The method employs an x-ray source for directing an x-ray beam at the moving substrate, and an x-ray detector to detect an amount of x-ray energy transmitted by the moving sheet of material. Areas of bare substrate will allow for different amounts of x-ray transmission than areas of the substrate containing the secondary material. These differences in transmission and/or absorption can be used to detect the location of a region of secondary material and to determine if it falls within an acceptable range. According to one particular embodiment of the present invention, the method can be used to analyze burn characteristic modifying bands of a secondary material intermittently and repeatedly deposited to a moving web of smoking article paper.

    摘要翻译： 一种用于检测和测量沉积在移动衬底上的二次材料的区域的方法。 该方法采用x射线源来引导移动的基底上的X射线束，以及x射线检测器，以检测由移动的材料片材传输的X射线能量的量。 裸基板的区域将允许与含有次级材料的基板的区域不同的x射线透射量。 传输和/或吸收中的这些差异可用于检测次级材料区域的位置并确定其是否在可接受的范围内。 根据本发明的一个具体实施方案，该方法可用于间歇地并重复地沉积到吸烟制品纸的移动网上的二次材料的燃烧特性修改带。

    Self-tuning controller
    8.
    发明授权
    Self-tuning controller 失效
    自整定控制器

    公开(公告)号：US4669040A

    公开(公告)日：1987-05-26

    申请号：US652181

    申请日：1984-09-19

    申请人： John W. Pettit ,  Douglas M. Carr

    发明人： John W. Pettit ,  Douglas M. Carr

    IPC分类号： G05B13/02 ,  G05B15/02 ,  G05B13/00

    CPC分类号： G05B15/02 ,  G05B13/024

    摘要： Method and apparatus for self-tuning a Proportional Integral-Derivative controller for controlling at least one load characteristic to a predetermined setpoint from calculated values of Proportional Band (PB), Integral Time Constant (ITC) and Derivative Time Constant (DTC) by application of power to the load, establishing a cut-off point to remove power to the load, determining the slope of a measured value of the at least one load characteristic and starting an integral time counter upon detection of the power cut-off point, determining at least one value X.sub.min at which the value of the measured value decreases by a fixed percentage, determining the maximum value X.sub.max of the at least one load characteristic, calculating the values of the PB, ITC and DTC by determining the rise X.sub.r =X.sub.max -X.sub.min and determining PB and ITC from a stored table relating X.sub.r to PB and the value incremented in the integral counter, determining the DTC value from the value incremented in the integral counter, storing the values of PB, ITC and DTC in a non-volatile storage and controlling the load with the aforementioned calculated values of PB, ITC and DTC.

    摘要翻译： 用于自调谐比例积分微分控制器的方法和装置，用于通过应用比例带（PB），积分时间常数（ITC）和微分时间常数（DTC）从计算的比例带（PB），计算的值来控制至少一个负载特性到预定的设定点 确定负载特性的测量值的斜率，并在检测到断电点时启动积分时间计数器，确定在 至少一个值Xmin，其中测量值的值降低固定百分比，确定至少一个负载特性的最大值Xmax，通过确定上升Xr = Xmax-Xmin计算PB，ITC和DTC的值 并从存储的关于Xr到PB的表和在积分计数器中递增的值确定PB和ITC，从在积分计数器中增加的值确定DTC值 在非易失性存储器中使用PB，ITC和DTC的值，并用PB，ITC和DTC的上述计算值控制负载。

    Conductive coating based on polymer-carbon nanotube composite
    9.
    发明授权
    Conductive coating based on polymer-carbon nanotube composite 失效
    基于聚合物 - 碳纳米管复合材料的导电涂层

    公开(公告)号：US08380018B2

    公开(公告)日：2013-02-19

    申请号：US13152857

    申请日：2011-06-03

    申请人： John W. Pettit

    发明人： John W. Pettit

    IPC分类号： G02F1/295 ,  G02B6/34

    CPC分类号： B82Y20/00 ,  B82Y30/00 ,  G02F1/0018

    摘要： A conductive polymer and a semiconducting carbon nanotube material are combined to form a highly conductive composite. The composite can be used for EMI shielding, optical sensing, optical switching, and other uses.

    摘要翻译： 将导电聚合物和半导体碳纳米管材料组合以形成高导电性复合材料。 该复合材料可用于EMI屏蔽，光学感测，光学开关等用途。