公开(公告)号：US6009652A

公开(公告)日：2000-01-04

申请号：US908367

申请日：1997-08-07

Applicant: David A. Smith

Inventor： David A. Smith

IPC: G09F7/22 ,  G09F7/00

CPC classification number: G09F7/22

Abstract: An outdoor sign construction comprising an inverted U-shaped wire frame and a rectangular corrugated plastic face panel. The sign face panel is retained on a horizontal header section of the frame between vertical frame legs by a resilient extruded plastic channel assembled around the header and out the top edge of the panel. The panel can be allowed to swing on the frame header or can be fixed against such movement by optional brackets. A secondary header and auxiliary sign panel can be assembled on the frame.

Abstract translation: 一种室外标志结构，包括倒置的U形线框架和矩形波纹塑料面板。 标志面板通过围绕头部组装并从面板的顶部边缘组装的弹性挤出塑料通道保持在框架的水平头部部分之间。 面板可以在框架头部上摆动，或者可以通过可选支架固定抵抗这种运动。 辅助标题面板和辅助标志面板可以组装在框架上。

公开(公告)号：US5959236A

公开(公告)日：1999-09-28

申请号：US52644

申请日：1998-03-31

Applicant: David A. Smith ,  Timothy C. Hungerford

Inventor： David A. Smith ,  Timothy C. Hungerford

IPC: F42C19/08 ,  C06C7/00 ,  B60R21/28 ,  C06C5/06

CPC classification number: F42C19/0815

Abstract: A miniaturized bulkhead with a barrier member having a thickness in the range of less than 0.05 inches thick for separating explosive charges on opposites sides. The miniaturized bulkhead is manufactured from an age hardened nickel-base alloy. First and second cavities are separated by the barrier member integral with the initiator body. The first cavity is filled with an explosive donor charge, and the second cavity is filled with an explosive acceptor charge. The composition of the age hardened nickelbase alloy includes nickel in the range of 50-55 percent by weight.

Abstract translation: 具有阻挡构件的小型舱壁，其厚度在小于0.05英寸厚的范围内，用于分离相对侧的爆炸装置。 小型化舱壁由老化的镍基合金制成。 第一和第二空腔由与引发器体一体的阻挡构件分开。 第一个空腔充满爆炸物供体，第二个空腔充满了炸药受体。 老化硬化镍基合金的组成包括在50-55重量％范围内的镍。

公开(公告)号：US5913955A

公开(公告)日：1999-06-22

申请号：US22729

申请日：1998-02-12

Applicant: James M. Redmond ,  Patrick S. Barney ,  Gordon G. Parker ,  David A. Smith

Inventor： James M. Redmond ,  Patrick S. Barney ,  Gordon G. Parker ,  David A. Smith

IPC: B23B29/02 ,  F16F15/02 ,  B23B3/00 ,  B23B5/00

CPC classification number: F16F15/02 ,  B23B29/022 ,  Y10S82/904 ,  Y10S82/905 ,  Y10T408/23 ,  Y10T408/76 ,  Y10T409/304312 ,  Y10T82/10 ,  Y10T82/2595

Abstract: The present invention provides vibration damping method and apparatus that can damp vibration in more than one direction without requiring disassembly, that can accommodate varying tool dimensions without requiring re-tuning, and that does not interfere with tool tip operations and cooling. The present invention provides active dampening by generating bending moments internal to a structure such as a boring bar to dampen vibration thereof.

Abstract translation: 本发明提供了可以在不需要拆卸的情况下阻尼多个方向上的振动的振动阻尼方法和装置，其可以适应不同的工具尺寸而不需要重新调谐，并且不干扰刀尖操作和冷却。 本发明通过产生诸如镗杆的结构内部的弯曲力矩来抑制其振动来提供主动阻尼。

公开(公告)号：US5720128A

公开(公告)日：1998-02-24

申请号：US492378

申请日：1995-06-19

Applicant: David A. Smith ,  Thelma E. Smith

Inventor： David A. Smith ,  Thelma E. Smith

IPC: A01G9/28 ,  A01G1/00

CPC classification number: A01G1/08

Abstract: An edging system for separating grass of a lawn from landscaping features thereof. The inventive device includes a plurality of linear members and a plurality of corner members which can be interconnected into a desired orientation. The members each include a vertical plate positionable into the lawn, and a horizontal plate projecting from an interior of the vertical plate which limits insertion of the vertical plate and maintains the same in a vertical orientation.

Abstract translation: 一种用于将草坪草与园林绿化特征分开的边缘系统。 本发明的装置包括多个线性构件和可以互连成所需取向的多个角构件。 这些构件各自包括可定位到草坪中的垂直板和从垂直板的内部突出的水平板，其限制垂直板的插入并将其保持在垂直取向。

公开(公告)号：US5580779A

公开(公告)日：1996-12-03

申请号：US416931

申请日：1995-04-04

Applicant: David A. Smith ,  Laurace Townsend ,  Dawn Newman ,  Ronald G. Duff

Inventor： David A. Smith ,  Laurace Townsend ,  Dawn Newman ,  Ronald G. Duff

IPC: C12N5/077 ,  C12N5/00 ,  A61K35/14

CPC classification number: C12N5/0657 ,  C12N2502/11

Abstract: The present invention relates to a method for inducing myocardial cell proliferation. It is based, at least in part, on the discovery that adult human myocardial cells may be induced to proliferate in culture by exposure to a platelet freeze/thaw extract. The present invention provides for a method for inducing myocardial cell proliferation in vitro, as well as for myocardial cell cultures produced by this method. In a preferred embodiment, the invention provides for human myocardial cell cultures. The myocardial cell cultures of the invention may be used to study the physiology of cardiac muscle. In addition, they may be used to identify pharmaceutical agents that may be useful in the treatment of heart disease or, alternatively, agents that are cardiotoxic. Furthermore, the cultures of the invention may be used to provide myocardial cells that may be transplanted or implanted in a patient that suffers from a cardiac disorder. In further embodiments, the present invention also provides for a method for inducing myocardial cell proliferation in vivo. Such methods may be used in the treatment of patients suffering from cardiac disorders, particularly those who have suffered damage or loss of cardiac muscle tissue.

Abstract translation: 本发明涉及诱导心肌细胞增殖的方法。 至少部分地基于这样的发现，即通过暴露于血小板冻融提取物可以诱导成体人心肌细胞在培养物中增殖。 本发明提供了一种在体外诱导心肌细胞增殖的方法，以及通过该方法产生的心肌细胞培养物。 在优选的实施方案中，本发明提供人心肌细胞培养物。 本发明的心肌细胞培养物可用于研究心肌的生理学。 此外，它们可以用于鉴定可用于治疗心脏病的药剂，或者是心脏毒性的药剂。 此外，本发明的培养物可以用于提供可以移植或植入患有心脏病症的患者中的心肌细胞。 在另外的实施方案中，本发明还提供在体内诱导心肌细胞增殖的方法。 这些方法可用于治疗患有心脏病的患者，特别是那些已经受到心肌组织损伤或损失的患者。

公开(公告)号：US5475441A

公开(公告)日：1995-12-12

申请号：US988517

申请日：1992-12-10

Applicant: Kenneth Parulski ,  Raymond J. Bouvy ,  Timothy J. Tredwell ,  David A. Smith

Inventor： Kenneth Parulski ,  Raymond J. Bouvy ,  Timothy J. Tredwell ,  David A. Smith

IPC: G06F3/00 ,  G06T1/00 ,  H04N1/00 ,  H04N1/21 ,  H04N5/225 ,  H04N101/00 ,  H04N5/30

CPC classification number: H04N1/2112 ,  H04N1/00204 ,  H04N2007/145 ,  H04N2101/00 ,  H04N2201/0051 ,  H04N2201/0077

Abstract: An electronic camera operates with a small, portable computer having a card interface of the type used for communicating with a removable memory card. The camera includes an image sensor for converting an image into an electrical signal, an A/D converter for converting the electrical signal into a digital signal, and a signal processor for interfacing the digital signal to the card interface, ordinarily a slot receptacle, on the computer. By defining the interface to include a mechanical extender that physically interconnects the camera to the card slot on the computer, the camera and computer are linked in a high speed interface as a convenient, hand-held unit.

Abstract translation: 电子照相机使用具有用于与可移动存储卡通信的类型的卡接口的小型便携式计算机操作。 相机包括用于将图像转换为电信号的图像传感器，用于将电信号转换为数字信号的A / D转换器，以及用于将数字信号与卡接口（通常为插槽插座）接口的信号处理器 电脑 通过定义接口以包括将相机物理地互连到计算机上的卡插槽的机械扩展器，相机和计算机以高速接口链接为方便的手持式单元。

公开(公告)号：US5331533A

公开(公告)日：1994-07-19

申请号：US944130

申请日：1992-09-11

Applicant: David A. Smith

Inventor： David A. Smith

IPC: H02M1/44 ,  H02M3/335

CPC classification number: H02M1/44 ,  H02M3/33576

Abstract: A circuit for utilizing the magnetizing current in the transformer of a power converter to reset the transformer's core and to provide a zero voltage switching condition on the converter's primary switch is disclosed. The transformer includes a primary winding and a secondary winding, the secondary winding being coupled to an output load and a primary switch connected in series between the primary winding and a voltage source. The closing of the primary switch causes energy to be stored in the transformer and the opening of the primary switch causes the energy to be released from the transformer. A transformer flux reversal circuit is used to reverse the direction of the magnetic flux built up in the transformer when the primary switch is opened. A secondary switch is coupled in series with the secondary winding of the transformer and is operated to prevent any loading effects of the load from disrupting the creation of the zero voltage switching condition.

Abstract translation: 公开了一种利用电力转换器的变压器中的磁化电流来复位变压器的磁芯并在转换器的主开关上提供零电压开关条件的电路。 变压器包括初级绕组和次级绕组，次级绕组耦合到输出负载和串联连接在初级绕组和电压源之间的初级开关。 主开关的关闭使得能量被存储在变压器中，并且主开关的断开导致能量从变压器释放。 当主开关打开时，变压器磁通反向电路用于反转变压器中积累的磁通量的方向。 二次开关与变压器的次级绕组串联耦合，并且被操作以防止负载的任何负载影响中断零电压开关条件的产生。

公开(公告)号：US5313109A

公开(公告)日：1994-05-17

申请号：US875631

申请日：1992-04-28

Applicant: David A. Smith

Inventor： David A. Smith

IPC: H02M3/335 ,  H03K17/042 ,  H05K1/02 ,  H05K1/16 ,  H05K1/18 ,  H03K3/01 ,  H03K3/30 ,  H03K17/56 ,  H03K17/60

CPC classification number: H02M3/335 ,  H03K17/04206 ,  H05K1/0216 ,  H05K1/16 ,  H05K1/18

Abstract: A circuit for the fast turn off of a field effect transistor (FET) for use in circuits such as a power converter circuit. The FET turn off circuitry includes a gate current sink transistor and a capacitor linked between the base of the gate current sink transistor and the drain of the FET. This capacitor increases the current into the base of the gate current sink transistor, and enables an increased magnitude of current to flow from the FET, thereby increasing the speed with which the FET turns off. A diode is preferably also connected between the base and the emitter of the gate current sink transistor to provide a return path to discharge the capacitor.

Abstract translation: 用于快速关闭用于诸如功率转换器电路的电路的场效应晶体管（FET）的电路。 FET截止电路包括栅极电流吸收晶体管和连接在栅极电流吸收晶体管的基极和FET的漏极之间的电容器。 该电容器将电流增加到栅极电流吸收晶体管的基极中，并且能够增加电流的大小从FET流出，从而增加FET截止的速度。 优选地，二极管也连接在栅极电流吸收晶体管的基极和发射极之间，以提供放电电容器的返回路径。

公开(公告)号：US5133029A

公开(公告)日：1992-07-21

申请号：US722703

申请日：1991-06-28

Applicant: Jane E. Baran ,  David A. Smith

Inventor： Jane E. Baran ,  David A. Smith

IPC: G02B5/30 ,  G02B6/126 ,  G02B6/34

CPC classification number: G02B6/126 ,  G02B6/274 ,  G02B6/2773

Abstract: A 2.times.2 polarization beam splitter comprising two parallel waveguides and two crossing waveguides coupled in an X-configuration to the parallel waveguides by four adiabatic .gamma.-junctions which transfer only one of the two orthogonal polarization modes across the junctions, e.g., the TE mode. The crossing waveguides may be of different widths and cross at a very shallow angle so that little cross-talk occurs at the crossing.

Abstract translation: 2x2偏振分束器包括两个平行波导和两个交叉波导，该平行波导和两个交叉波导通过四个绝热γ - 结而以X形结构耦合到平行波导，其仅在两个结点（例如TE模式）上传送两个正交偏振模式中的一个。 交叉波导可以具有不同的宽度并且以非常浅的角度交叉，使得在交叉点处发生很少的串扰。

公开(公告)号：US5097403A

公开(公告)日：1992-03-17

申请号：US653776

申请日：1991-02-11

Applicant: David A. Smith

Inventor： David A. Smith

IPC: G01R19/22 ,  H02M3/158 ,  H02M3/335

CPC classification number: G01R19/22 ,  H02M3/158 ,  H02M3/33569

Abstract: A current-sensing rectifier for current rectification and measurement applications is described. The current-sensing rectifier comprises a current-sensing device for rectifying the current in a selected circuit branch and an active-sense comparison circuit to measure the sense current provided by the current-sensing device. The current-sensing device and active measurement circuit are operated such that the current-sensing device rectifies the current of a selected circuit branch. No negative voltage supplies are required for rectification or for the measurement of the branch current. Further embodiments of the present invention include sample-and-hold circuits which sample the value of the rectified current during an ON-period of operation and maintain the sampled value during a subsequent OFF-period.

Abstract translation: 描述了用于电流整流和测量应用的电流感应整流器。 电流感测整流器包括用于整流所选电路支路中的电流的电流感测装置和用于测量由电流感测装置提供的感测电流的主动检测比较电路。 操作电流感测装置和主动测量电路，使得电流感测装置对所选择的电路支路的电流进行整流。 整流或测量分支电流时不需要负电压。 本发明的另外的实施例包括采样和保持电路，其在ON周期期间对整流电流的值进行采样，并在随后的OFF周期期间维持采样值。