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39 条记录 (耗时 0.027 秒)

    Breath Test Simulator
    3.
    发明申请
    Breath Test Simulator 有权
    呼吸测试模拟器

    公开(公告)号：US20080060409A1

    公开(公告)日：2008-03-13

    申请号：US11844461

    申请日：2007-08-24

    申请人： Richard U. Guth ,  David A. Fisher

    发明人： Richard U. Guth ,  David A. Fisher

    IPC分类号： G01N33/497

    CPC分类号： G01N33/4972 ,  Y10T436/100833

    摘要： A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.

    摘要翻译： 用于向呼吸测试分析仪提供控制顶部空间和相邻排出通道温度的乙醇样品流出物的呼吸模拟器。

    Portable breath test simulator
    4.
    发明授权
    Portable breath test simulator 有权
    便携式呼吸测试模拟器

    公开(公告)号：US06526802B1

    公开(公告)日：2003-03-04

    申请号：US09894716

    申请日：2001-06-28

    申请人： David A. Fisher ,  Richard U. Guth

    发明人： David A. Fisher ,  Richard U. Guth

    IPC分类号： G01N33497

    CPC分类号： G01N33/4972 ,  Y10T436/100833

    摘要： A portable breath test simulator including a case having a jar support arm extending to one side of the top of the case. A jar containing a known water-alcohol solution is mounted on the bottom of the arm. The case and jar support the simulator. A magnetic power drive located in the case to one side of the jar rotates a magnetic stirrer in the jar. Breath blown into the jar forms an effluent having a known concentration of alcohol and is flowed to a breath test analyzer to be tested.

    摘要翻译： 一种便携式呼吸测试模拟器，包括具有延伸到壳体顶部的一侧的罐支撑臂的壳体。 包含已知水 - 醇溶液的罐安装在手臂的底部。 案例和jar支持模拟器。 位于罐的一侧的壳体中的磁力驱动器在罐中旋转磁力搅拌器。 吹入瓶中的呼吸形成具有已知浓度的酒精的流出物，并流入呼吸试验分析器进行测试。

    BREATH TEST SIMULATOR
    5.
    发明申请
    BREATH TEST SIMULATOR 有权
    呼吸测试模拟器

    公开(公告)号：US20080060408A1

    公开(公告)日：2008-03-13

    申请号：US11530489

    申请日：2006-09-11

    申请人： Richard U. Guth ,  David A. Fisher

    发明人： Richard U. Guth ,  David A. Fisher

    IPC分类号： G01N33/00

    CPC分类号： G01N33/4972 ,  Y10T436/100833

    摘要： A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.

    摘要翻译： 用于向呼吸测试分析仪提供控制顶部空间和相邻排出通道温度的乙醇样品流出物的呼吸模拟器。

    Power transfer apparatus for concurrently transmitting data and power over data wires
    6.
    发明授权
    Power transfer apparatus for concurrently transmitting data and power over data wires 有权
    用于同时发送数据并通过数据线上电的电力传送装置

    公开(公告)号：US6140911A

    公开(公告)日：2000-10-31

    申请号：US416067

    申请日：1999-10-12

    申请人： David A. Fisher ,  Lawrence M. Burns ,  Stephen E. Muther

    发明人： David A. Fisher ,  Lawrence M. Burns ,  Stephen E. Muther

    IPC分类号： H04B3/54 ,  H04L12/10 ,  H04B1/00 ,  G08C19/00

    CPC分类号： H04L12/10 ,  H04B3/542 ,  H04B2203/5437 ,  H04B2203/5441 ,  H04B2203/5445 ,  H04B2203/547 ,  H04B2203/5483 ,  H04B2203/5491

    摘要： Electrical supply current, sufficient to power a wireless access point, is transmitted concurrently with a network data signal across a transmission line. A power and data coupler couples the network data signal and the power signal, received through a data input and a power input respectively, and transmits the coupled signal, to a distance of three meters or more, over the transmission line to a power and data decoupler. The power and data decoupler separates the power signal from the network data signal and supplies those signals to a power output port and a data output port, respectively, for use by a wireless access node. The power signal may be modulated at a low frequency relative to the frequency of the data signal, and the network data signal has a data transmission rate of one megabit/second or higher.

    摘要翻译： 足以为无线接入点供电的供电电流通过传输线与网络数据信号同时传输。 电力和数据耦合器通过数据输入和电源输入耦合网络数据信号和功率信号，并将传输线上的耦合信号传输到三米或更远的距离，以将功率和数据 解耦器 功率和数据去耦器将功率信号与网络数据信号分离，并将这些信号分别提供给功率输出端口和数据输出端口，供无线接入节点使用。 功率信号可以相对于数据信号的频率以低频进行调制，并且网络数据信号具有1兆比特/秒以上的数据传输速率。

    High frequency signal detector
    7.
    发明授权
    High frequency signal detector 失效
    高频信号检测器

    公开(公告)号：US5936537A

    公开(公告)日：1999-08-10

    申请号：US716763

    申请日：1996-09-23

    申请人： Lawrence M. Burns ,  Daniel Case ,  David A. Fisher

    发明人： Lawrence M. Burns ,  Daniel Case ,  David A. Fisher

    IPC分类号： G01R21/01 ,  G08B21/00

    CPC分类号： G01R21/01

    摘要： A micro-power, micro-size RF detector is suitable for implementation on an integrated circuit. The detector is used for detecting the presence of high frequency AC signals on a transmission line which has a transmission line impedance. An input for connection to the transmission line through a high impedance relative to the transmission line is provided. A current mode detector is coupled to the input. The current mode detector translates AC signals on the input to a bias signal having a DC component determined by power of the AC signal on the transmission line. A current mode amplifier is coupled to the current mode detector, and amplifies the bias signal to produce a detector current. A binary output driver is coupled to the current mode amplifier, which generates a binary signal having one binary level if the detector current exceeds a high signal threshold, and another binary level if the detector current falls below a low signal threshold.

    摘要翻译： 微功率微型RF检测器适用于集成电路上的实现。 该检测器用于检测在具有传输线阻抗的传输线上存在高频AC信号。 提供了用于通过高阻抗相对于传输线连接到传输线的输入。 电流模式检测器耦合到输入端。 电流模式检测器将输入端的AC信号转换成具有由传输线上的AC信号的功率确定的DC分量的偏置信号。 电流模式放大器耦合到电流模式检测器，并且放大偏置信号以产生检测器电流。 二进制输出驱动器耦合到电流模式放大器，其如果检测器电流超过高信号阈值则产生具有一个二进制电平的二进制信号，以及如果检测器电流低于低信号阈值则产生另一二进制电平。

    Telecommunications systems
    8.
    发明授权
    Telecommunications systems 失效
    电信系统

    公开(公告)号：US5444710A

    公开(公告)日：1995-08-22

    申请号：US152281

    申请日：1993-11-12

    申请人： David A. Fisher ,  Paul D. Welton

    发明人： David A. Fisher ,  Paul D. Welton

    IPC分类号： H04B10/272 ,  H04J3/06 ,  H04L7/04 ,  H04B7/212

    CPC分类号： H04L7/041 ,  H04B10/272 ,  H04J3/0682 ,  H04L7/042

    摘要： A method for marshalling an additional outstation (3) of a time division multiple access (TDMA) telecommunication system including a basestation (4) and a plurality of outstations (1,2), such as a passive optical network (PON). A sequence is transmitted from the additional outstation (3) to the basestation (4) at a level below the noise sensitivity of a receiver (49) of the basestation (4), detected at the base station and its phase determined by a correlation process. From the phase the loop delay to the additional outstation is determined and the outstation instructed to realign its transmission accordingly. The sequence is a short length sequence and the correlation can be performed by a binary division search method or a lowest common multiple method (FIG. 1).

    摘要翻译： 一种用于编组包括基站（4）和诸如无源光网络（PON）的多个外站（1,2）的时分多址（TDMA）电信系统的附加外站（3）的方法。 在从基站检测到的基站（4）的接收机（49）的噪声敏感度的水平以下，从附加断开站（3）向基站（4）发送序列，并且通过相关处理确定其相位 。 从相位确定回路延迟到额外的外站，并且指挥局要相应地调整其传输。 序列是短长度序列，并且可以通过二进制分割搜索方法或最低公共多重方法（图1）来执行相关性。

    Binary for penternary (five-level) encoding system
    9.
    发明授权
    Binary for penternary (five-level) encoding system 失效
    二进制（五级）编码系统

    公开(公告)号：US5191330A

    公开(公告)日：1993-03-02

    申请号：US806723

    申请日：1991-12-12

    申请人： David A. Fisher ,  Daniel R. Donovan

    发明人： David A. Fisher ,  Daniel R. Donovan

    IPC分类号： H04L25/49

    CPC分类号： H04L25/4919

    摘要： A digital data transmission system wherein binary coded data to be transmitted over the system is converted into a five-level (penternary or quinternary) line code prior to transmission over the system and is reconverted to binary data after transmission over the system. The choice of penternary word is conditional on the previous penternary word.

    Method of sound attenuation in centrifugal blowers
    10.
    发明授权
    Method of sound attenuation in centrifugal blowers 有权
    离心式鼓风机声衰减方法

    公开(公告)号：US06575696B1

    公开(公告)日：2003-06-10

    申请号：US09951277

    申请日：2001-09-11

    申请人： Leslie A. Lyons ,  David A. Fisher

    发明人： Leslie A. Lyons ,  David A. Fisher

    IPC分类号： F04D2944

    CPC分类号： F04D29/665

    摘要： A centrifugal blower housing that includes sound attenuating features to decrease the noise generated by the pressure fluctuations due to blade pass. The blower housing includes at least one sound attenuating cavity positioned along the exhaust section integrally formed as part of the blower housing. The sound cavity creates a sound dampening zone near the outlet of the blower housing to attenuate the sound generated by the rotating impeller. The blower housing further includes an angled cut off portion positioned near the intersection of the exhaust section and the scroll section of the blower housing. The angled cut off portion creates an uneven surface that disrupts the pressure fluctuation created as the impeller blades pass over the cut off edge surface. The angled cut off portion extends into the interior of the exhaust section and defines an irregular surface along at least a portion of the exhaust section.

    摘要翻译： 离心鼓风机壳体，其包括声音衰减特征，以减少由于叶片通过引起的压力波动产生的噪声。 鼓风机壳体包括沿着排气部分定位的至少一个声音衰减腔，其一体形成为鼓风机壳体的一部分。 声腔在鼓风机壳体的出口附近形成声音衰减区，以减弱由旋转叶轮产生的声音。 鼓风机壳体还包括位于鼓风机壳体的排气部分和涡旋部分的交叉点附近的成角度的切断部分。 倾斜的切断部分产生不平坦的表面，其破坏当叶轮叶片越过切割边缘表面时产生的压力波动。 成角度的切断部分延伸到排气部分的内部并沿着排气部分的至少一部分限定不规则的表面。