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公开(公告)号：US4973917A
公开(公告)日：1990-11-27
申请号：US413399
申请日：1989-09-27
申请人： William A. Johnson
发明人： William A. Johnson
CPC分类号： H03F3/26 , H04R2460/03 , H04R25/00
摘要： An output amplifier having a pair of controlled current generators each with an output impedance that is electrically connected to the other, a pair of output controllers each of which is across a corresponding one of the output impedances, and a pair of feedback impedances each connected from a corresponding one of the output controllers to a corresponding one of the controlled current generators. A differential amplifier is provided ahead of the controlled current generators with the amlifier input capacitively connected to the input of such differential amplifier. An offset adjuster is provided between the output impedances having its output connected to the capacitively connected differential amplifier input. A current feedback arrangement is provided between the output impedances and connected to the controlled current generators to be capable of altering currents generated thereby.
摘要翻译： 一种具有一对受控电流发生器的输出放大器，每个控制电流发生器各自具有电连接到另一个的输出阻抗，一对输出控制器，每个输出控制器分别跨越相应的一个输出阻抗，以及一对反馈阻抗， 输出控制器中对应的一个控制电流发生器。 在受控电流发生器之前提供差分放大器，其中电容性地连接到这种差分放大器的输入端的放大器输入。 在输出阻抗之间设置偏移调整器，其输出端连接到电容连接的差分放大器输入。 在输出阻抗之间提供电流反馈装置并连接到受控电流发生器以能够改变由此产生的电流。
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公开(公告)号：US4790018A
公开(公告)日：1988-12-06
申请号：US13376
申请日：1987-02-11
CPC分类号： H04R3/04 , H04R25/502
摘要： A signal processing circuit for hearing aids includes a broadband peak detector for generating a control voltage based upon the sound pressure level of an incoming acoustical signal over its entire frequency spectrum. The control signal is used to determine the cut-off frequency of a voltage controlled adaptive high-pass filter. An amplified electrical signal, corresponding to the acoustical signal, also is provided to the high-pass filter. In setting the cut-off frequency, the control voltage causes the high-pass filter to selectively suppress the low frequency portion of the signal, generating a modified signal in which the noise component is reduced.
摘要翻译： 用于助听器的信号处理电路包括：宽带峰值检测器，用于基于输入的声音信号在其整个频谱上的声压级产生控制电压。 控制信号用于确定压控自适应高通滤波器的截止频率。 对应于声信号的放大电信号也被提供给高通滤波器。 在设定截止频率时，控制电压使高通滤波器选择性地抑制信号的低频部分，产生噪声分量减小的修正信号。
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公开(公告)号：US09374887B1
公开(公告)日：2016-06-21
申请号：US13618997
申请日：2012-09-14
申请人： Larry K. Warne , Lorena I. Basilio , William L. Langston , William A. Johnson , Jon Ihlefeld , James C. Ginn, III , Paul G. Clem , Michael B. Sinclair
发明人： Larry K. Warne , Lorena I. Basilio , William L. Langston , William A. Johnson , Jon Ihlefeld , James C. Ginn, III , Paul G. Clem , Michael B. Sinclair
CPC分类号： H05K1/024 , G02B1/002 , H01P1/2005 , H01P7/10 , H01Q15/0086
摘要： Resonances can be tuned in dielectric resonators in order to construct single-resonator, negative-index metamaterials. For example, high-contrast inclusions in the form of metallic dipoles can be used to shift the first electric resonance down (in frequency) to the first magnetic resonance, or alternatively, air splits can be used to shift the first magnetic resonance up (in frequency) near the first electric resonance. Degenerate dielectric designs become especially useful in infrared- or visible-frequency applications where the resonator sizes associated with the lack of high-permittivity materials can become of sufficient size to enable propagation of higher-order lattice modes in the resulting medium.
摘要翻译： 谐振可以在介质谐振器中进行调谐，以构建单谐振器，负指数超材料。 例如，可以使用金属偶极子形式的高对比度夹杂物将第一电共振向下（频率）向下移动到第一磁共振，或者，可以使用空气分裂来使第一磁共振向上移动（在 频率）靠近第一次电共振。 退化电介质设计在红外或可见频率应用中变得特别有用，其中与缺少高介电常数材料相关联的谐振器尺寸可以变得足够的尺寸以使得能够在所得介质中传播高阶晶格模式。
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公开(公告)号：US08202219B2
公开(公告)日：2012-06-19
申请号：US11063012
申请日：2005-02-22
IPC分类号： A61B8/00
CPC分类号： A61B8/0875
摘要： A method for the assessment of various properties of bone is provided. The method includes applying a pair of ultrasound transducers to skin on opposite sides of the bone and generating an ultrasound signal and directing the signal through both the bone to obtain a bone output signal. The method further includes establishing a set of parameters associated with the bone output signal and then further processing the parameters in order to obtain the desired bone property. Two novel parameters are also disclosed, namely the net time delay (NTD) and mean time duration (MTD) parameters. An apparatus for the assessment of various properties of bone is also provided. The apparatus includes a pair of ultrasound transducers which may be single-element transducers or array transducers in any combination. The apparatus further includes various computer hardware components and computer software for generating and directing the ultrasound signal, establishing the parameter set and performing the processing. In addition, an apparatus that is battery powered, handheld, and portable and operates in real time is also provided.
摘要翻译： 提供了一种用于评估骨骼各种性质的方法。 该方法包括将一对超声换能器应用于骨的相对侧上的皮肤并产生超声信号并将信号引导通过骨骼以获得骨输出信号。 该方法还包括建立与骨输出信号相关联的一组参数，然后进一步处理参数以获得期望的骨性质。 还公开了两个新颖的参数，即净时延（NTD）和平均持续时间（MTD）参数。 还提供了用于评估骨的各种性质的装置。 该装置包括一对超声换能器，其可以是任何组合的单元件换能器或阵列换能器。 该装置还包括用于生成和指导超声信号的各种计算机硬件组件和计算机软件，建立参数组并执行处理。 此外，还提供了电池供电，手持式和便携式并且实时操作的装置。
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公开(公告)号：US08054937B2
公开(公告)日：2011-11-08
申请号：US12484172
申请日：2009-06-12
IPC分类号： G01N23/04
CPC分类号： G01N23/02 , G01V5/0016
摘要： The present invention is directed toward an X-ray scanning system having a plurality of detectors and a controller, where a) the controller is configured to receive and identify a minimum X-ray transmission level detected by at least one detector, b) the controller compares the minimum X-ray transmission level to at least one predetermined threshold transmission level, and c) based on said comparison, the controller generates an adjustment signal. The present invention further comprises an X-ray source, where the X-ray source receives an adjustment signal and is configured to adjust an X-ray pulse duration based on the adjustment signal.
摘要翻译： 本发明涉及具有多个检测器和控制器的X射线扫描系统，其中a）控制器被配置为接收和识别由至少一个检测器检测到的最小X射线透射电平，b）控制器 将最小X射线透射电平与至少一个预定阈值透射电平进行比较，以及c）基于所述比较，所述控制器产生调整信号。 本发明还包括X射线源，其中X射线源接收调整信号并且被配置为基于调整信号调整X射线脉冲持续时间。
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公开(公告)号：US06962345B2
公开(公告)日：2005-11-08
申请号：US10366186
申请日：2003-02-13
CPC分类号： F02F11/002 , F16J15/0825 , F16J2015/0837
摘要： A gasket includes an intermediate layer having resilient sealing beads flanked by stopper beads. The three-layer gasket, particularly designed for heavy duty racing engines, provides a relatively robust cross-section in web-areas between cylinder bore apertures. A thin bottom layer includes wrap-around flanged portions extending about cylinder bore edges of the intermediate layer to partially overlap cylinder bore aperture areas of that layer. The flanged portions include a plurality of waves to increase forces to generate the seal. A thin top layer overlies the intermediate layer, as well as the overlapping portions of the bottom layer. In one described embodiment, the overlapping portions are limited to cylinder bore edges between cylinder bores. As a between-engine-overhaul indication of engine health, the top gasket layer is adapted via plastic deformation to form a permanent indentation in an aluminum cylinder head to signal excessive engine operation.
摘要翻译： 衬垫包括具有弹性密封珠的中间层，其侧面为止动珠。 特别设计用于重型赛车发动机的三层垫圈在气缸孔径之间的腹板区域提供了相当坚固的横截面。 薄的底层包括围绕中间层的气缸孔边缘延伸的环绕法兰部分，以部分地重叠该层的气缸孔孔面积。 凸缘部分包括多个波浪以增加产生密封的力。 薄的顶层覆盖在中间层以及底层的重叠部分上。 在一个所描述的实施例中，重叠部分限于缸孔之间的缸孔边缘。 作为发动机健康的发动机间大修指示，顶部衬垫层通过塑性变形来适应，以在铝制气缸盖中形成永久的压痕，以发出过大的发动机运转。
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公开(公告)号：US6070401A
公开(公告)日：2000-06-06
申请号：US143325
申请日：1998-08-28
申请人： William A. Johnson
发明人： William A. Johnson
CPC分类号： A01D41/14
摘要： A device for preventing rocks and dirt from entering a combine including a plurality of grain saver dam sections secured to a bracket by a bolt, bushing, mounting bracket and nut. The grain saver dam section includes a series of cutout sections and horizontal support sections.
摘要翻译： 一种用于防止岩石和污物进入组合的装置，包括通过螺栓，衬套，安装支架和螺母固定到支架上的多个谷物节流坝段。 谷物节水坝段包括一系列切割部分和水平支撑部分。
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公开(公告)号：US5590239A
公开(公告)日：1996-12-31
申请号：US254845
申请日：1994-06-06
CPC分类号： H01L21/67103 , G03F1/22 , G03F7/70866 , G21K1/06 , H01J2237/2001
摘要： A uniform heating fixture and method of use is provided. A heat conductive member having a first plane surface, a second surface and a third plane surface is formed. The first plane surface and the third plane surface are parallel and are connected by a second surface. The third plane surface circumscribes and extends away from the first plane surface, thereby enabling uniform heating of an X-ray mask.
摘要翻译： 提供均匀的加热夹具和使用方法。 形成具有第一平面，第二表面和第三平面的导热构件。 第一平面和第三平面平行并通过第二表面连接。 第三平面表面限定并远离第一平面，从而能够均匀地加热X射线掩模。
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公开(公告)号：US5404115A
公开(公告)日：1995-04-04
申请号：US114869
申请日：1993-09-01
申请人： William A. Johnson
发明人： William A. Johnson
CPC分类号： H03G9/18
摘要： An amplifying system for variably amplifying electrical input signals, depending on magnitudes of those signals, with the variation in amplification being selectable as is substantially the maximum output signal value.
摘要翻译： 根据这些信号的大小可变地放大电输入信号的放大系统，其中放大的变化是可选择的，基本上是最大输出信号值。
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公开(公告)号：US5031156A
公开(公告)日：1991-07-09
申请号：US449444
申请日：1989-12-12
IPC分类号： G06M7/00
CPC分类号： G06M7/00
摘要： Articles, moving along a delivery path, are counted by directing a stream of pressurized air toward one major surface of the passing articles, the direction of the air stream being transverse to the direction of travel. Sensors arranged about the air stream detect the acoustic signal which varies with changes in the profile of the passing articles, exemplified by signatures. The detected acoustic signal is divided into a plurality of frequency ranges which, in one preferred emboidment, are averaged to reduce the effect of noise which may be present in only limited ones of the frequency bands. The averaged signals are then compared against thresholds to determine the instantaneous state of the articles, exemplified by a signature stream, to generate count signals.
摘要翻译： 沿着输送路径移动的物品通过将加压空气流引导到经过的物品的一个主表面来计数，空气流的方向横向于行进方向。 围绕空气流布置的传感器检测随着通过物品的轮廓的变化而变化的声信号，以签名为例。 检测到的声信号被分成多个频率范围，在一个优选的实施中，它被平均以减少可能存在于仅有限频带中的噪声的影响。 然后将平均信号与阈值进行比较，以确定用签名流示例的物品的瞬时状态，以生成计数信号。
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