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公开(公告)号：US5218653A
公开(公告)日：1993-06-08
申请号：US790668
申请日：1991-11-08
Applicant: John J. Johnson , David A. Smith
Inventor： John J. Johnson , David A. Smith
CPC classification number: G02F1/335 , G02F1/125 , G02F2203/06
Abstract: An apodized acousto-optic polarization converter in which two acoustic waveguides are (14, 20) are formed in a substrate and are separated by a small gap (18) such that the two acoustic waveguides act as a directional coupler in which acoustic power is transferred back and forth. An interdigitated transducer (12) launches a surface acoustic wave in the first acoustic waveguide, and an optical waveguide is formed in the middle of the second waveguide. An acoustic absorber (26) is formed over both acoustic waveguides at a distance from the transducer such that the acoustic wave is transferred from the first to the second waveguide and back again. Thereby, the optical signal in the optical waveguide is exposed to an acoustic power density that slowly increases to a maximum and then decreases with the result that the side lobes of the frequency spectrum for the converted signal are greatly reduced. The converter may be used as an electrically tunable optical filter using orthogonal input and output polarizers (30, 32).
Abstract translation: 一个变迹的声光偏振转换器，其中两个声波导是（14,20）形成在衬底中并被一个小的间隙（18）隔开，使得两个声波导作为定向耦合器，其中声功率被传输 来来回回。 交叉换能器（12）在第一声波导中发射表面声波，并且在第二波导的中间形成光波导。 在距离换能器一定距离的两个声波导上形成吸声器（26），使得声波从第一波导传输到第二波导并再次返回。 因此，光波导中的光信号暴露于缓慢增加到最大然后减小的声功率密度，结果是转换信号的频谱的旁瓣大大减小。 转换器可以用作使用正交输入和输出偏振器（30,32）的电可调光滤波器。
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公开(公告)号：US5198521A
公开(公告)日：1993-03-30
申请号：US781002
申请日：1991-10-29
Applicant: Wendell A. Ehrhart , Nowaf Halout , Kenneth K. Ko , David A. Smith
Inventor： Wendell A. Ehrhart , Nowaf Halout , Kenneth K. Ko , David A. Smith
IPC: C08G18/10 , C08G18/24 , C08G18/48 , C08G18/73 , C08G18/75 , C08G18/76 , C08G18/83 , C09K3/16 , D06N7/02 , H01B1/12
CPC classification number: C09K3/16 , C08G18/10 , C08G18/242 , C08G18/4833 , C08G18/73 , C08G18/758 , C08G18/765 , C08G18/838 , H01B1/122 , Y10S524/91 , Y10S524/912 , Y10S524/914 , Y10T428/31551
Abstract: A water reaction synthesis with polyoxyethylene diol, diisocyanate and dibutyltin bis lauryl mercaptide produces a high molecular weight thermoplastic polyurethane-urea linear polymer with surface resistivity 10.sup.11 -10.sup.6 ohm/sq. Thermoplastic and/or elastomeric antistatic compositions containing other melt processable polymers and/or filler, and the polymer exhibit permanent protection. Antistatic protection can be increased when the polymer complexes with a metal salt such as lithium chloride, or lithium acetate. The composition is useful in the manufacture of antistatic floor coverings and textile texturing and drafting elements such as cots and aprons.
Abstract translation: 与聚氧乙烯二醇，二异氰酸酯和二月桂基硫醇二丁基锡的水反应合成产生表面电阻率为1011-106欧姆/平方厘米的高分子量热塑性聚氨酯 - 尿素线性聚合物。 含有其它可熔融加工的聚合物和/或填料的热塑性和/或弹性体抗静电组合物，并且聚合物表现出永久的保护。 当聚合物与金属盐如氯化锂或乙酸锂复合时，可以提高抗静电保护性。 该组合物可用于制造抗静电地板和纺织品纹理和起草元件如婴儿床和围裙。
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123.发明授权
公开(公告)号：US5177431A
公开(公告)日：1993-01-05
申请号：US765388
申请日：1991-09-25
Applicant: David A. Smith , Carl K. Sawtell
Inventor： David A. Smith , Carl K. Sawtell
Abstract: An adjustable power converter which allows the output voltage of the power converter to be controlled linearly by a programming resistor or a programming voltage is provided. The adjustable power converter includes a linear programming circuit which generates a current as a linear function of the programming voltage or the resistance of the programming resistor. The current is connected to the feedback loop of a conventional power converter such that the output voltage of the power converter is a linear function of the current. As a result, the output voltage of the power converter can be linearly adjusted by adjusting the programming voltage or the programming resistor.
Abstract translation: 提供了一种可调节功率转换器，其允许功率转换器的输出电压由编程电阻器或编程电压线性控制。 可调功率转换器包括线性编程电路，其产生电流作为编程电压或编程电阻器的电阻的线性函数。 电流连接到常规功率转换器的反馈回路，使得功率转换器的输出电压是电流的线性函数。 因此，可以通过调节编程电压或编程电阻来直接调整功率转换器的输出电压。
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公开(公告)号：US5062549A
公开(公告)日：1991-11-05
申请号：US431418
申请日：1989-11-03
Applicant: David A. Smith , Clark M. Woody
Inventor： David A. Smith , Clark M. Woody
CPC classification number: B05B15/005 , B05B11/0059 , B05B15/08
Abstract: A hand held, dip-tube style liquid spray dispenser comprising a container having an inclined bottom, sidewalls extending upwardly from the bottom, and an upper end, a dispensing device positioned adjacent this upper end for dispensing a liquid held in the container and communicated upward to the dispensing device, and a tube for communicating liquid upward from a lower end of the tube to the dispensing device. The tube being of a sufficient length such that the lower end of the tube is urged toward the lowermost portion of the bottom when the container is oriented as in use.
Abstract translation: 一种手持式汲管式液体喷雾分配器，其包括具有倾斜底部的容器，从底部向上延伸的侧壁，以及上端，与该上端相邻设置的分配装置，用于分配保持在容器中的液体并向上传送 以及用于将液体从管的下端向上连通到分配装置的管。 该管具有足够的长度，使得当容器在使用中定向时，管的下端被推向底部的最下部。
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公开(公告)号：US5001620A
公开(公告)日：1991-03-19
申请号：US385662
申请日：1989-07-25
Applicant: David A. Smith
Inventor： David A. Smith
CPC classification number: H02M1/4225 , H02M3/156 , H02M3/158 , Y02B70/126
Abstract: A boost convertor power supply comprising an electronic switch controlling current through a boost inductance, a rectifier for charging a capacitor which accumulates the resulting boost charge from the boost inductance, and circuitry for repeatedly switching the electronic switch. A pulse width modulation circuit varies the relative on/off period of each cycle of switching to cause the peck switch current to follow a variable amplitude wave of shape corresponding to the input voltage applied to the boost converter and amplitude controlled by an error amplifier and multiplier thereby regulating the output voltage. A ramp signal generator provides for pulse width stability. An error correction circuit corrects for the difference between average current in the boost inductor and peak switch current to modify the pulse width modulation circuit to reduce distortion of the line current waveform.
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Patent Agency Ranking126.发明授权
公开(公告)号：US4773019A
公开(公告)日：1988-09-20
申请号：US855824
申请日：1986-04-24
Applicant: Michael R. Martin , David A. Smith , William H. Wetterau
Inventor： Michael R. Martin , David A. Smith , William H. Wetterau
CPC classification number: G01M1/34
Abstract: A system for balancing rotating members comprising a laser head which emits a laser shot in response to a laser control signal to remove material from the rotating member. The laser control signal is produced by a computer which is responsive to a plurality of signals representing vibration of the rotating member and influence coefficients from a memory device. The computer applies less than a calculated number of laser shots at each targeted location of the rotating member and then applies this reduced number sequentially to all targeted locations while calculating whether the vibration signals fall below targeted levels and, if so, discontinuing removal of material by the laser.
Abstract translation: 一种用于平衡旋转构件的系统，包括：激光头，其响应于激光控制信号发射激光射击，以从旋转构件移除材料。 激光控制信号由计算机产生，该计算机响应于表示旋转部件的振动的多个信号并影响来自存储装置的系数。 计算机在旋转构件的每个目标位置处施加小于计算的激光照射数量，然后在计算振动信号是否低于目标水平的同时将该减少的数量顺序地应用于所有目标位置，并且如果是，则通过 激光。
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公开(公告)号：US4444253A
公开(公告)日：1984-04-24
申请号：US390631
申请日：1982-06-21
Applicant: David A. Smith , Marvin D. Smith
Inventor： David A. Smith , Marvin D. Smith
CPC classification number: E21B43/124
Abstract: An apparatus adapted for use with a pump equipped tubing string disposed within a casing for use in conjunction with an oil well comprising: a tubing string extension having an upper end, a lower end and an opening extending therethrough intersecting the upper and the lower ends thereof, the upper end being connected to the depending end of the tubing string, the tubing string extension having a reduced diameter portion intermediate the upper and the lower ends thereof, at least two nozzle openings formed through the reduced diameter portion of the tubing string extension, each nozzle opening having one end intersecting the outer peripheral surface of the tubing string extension and an opposite end portion intersecting the opening extending through the reduced diameter portion of the tubing string extension, the fluid passing from the reduced diameter portion of the tubing string extension resulting in a pressure reduction causing fluid to be drawn through the nozzle openings in the tubing string extension and into and through the opening in the tubing string extension; an upper and a lower seal assembly, each seal assembly surrounding the tubing string extension, the upper and the lower seal assemblies being disposed on the tubing string extension so that the intersections of the nozzle openings with the outer peripheral surface of the tubing string extension are disposed generally within the space between the upper and the lower seal assemblies, the upper and the lower seal assemblies each being adapted to sealingly engage the tubing string extension and the casing; and vent means for venting gas existing generally below the lower seal assembly through the lower and the upper seal assemblies to substantially reduce the presence of gas in the area near the intersections of the nozzle openings with the outer peripheral surface of the tubing string extension.
Abstract translation: 一种适于与设置在壳体内用于与油井结合使用的泵配备的油管柱一起使用的装置，包括：管柱延伸部，其具有上端，下端和延伸穿过其的上端和下端的开口 上端连接到管柱的悬垂端，管柱延伸部在其上端和下端之间具有直径减小的部分，至少两个通过管柱延伸部的直径缩小部分形成的喷嘴开口， 每个喷嘴开口具有与管柱延伸部的外周表面相交的一端和与延伸穿过管柱延伸部的直径减小部分的开口相交的相对端部，流体从管柱延伸部的直径缩小部分通过，导致 在压力下降导致流体被吸引通过the内的喷嘴开口 叮叮ing string extension extension extension through;;;;;;;;;;;;;;;; 上密封组件和下密封组件，每个密封组件围绕管柱延伸部，上密封组件和下密封组件设置在管柱延伸部上，使得喷嘴开口与管柱延伸部的外周表面的交叉是 通常设置在上部和下部密封组件之间的空间内，上部和下部密封组件各自适合于密封地接合管柱延伸部和壳体; 以及排气装置，用于通过下密封组件和上密封组件大致在下密封组件下方排放气体，以大大减少在喷嘴开口与管柱延伸部的外周表面的交叉点附近的区域中的气体的存在。
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公开(公告)号：US4440399A
公开(公告)日：1984-04-03
申请号：US499343
申请日：1983-05-31
Applicant: David A. Smith
Inventor： David A. Smith
CPC classification number: A63B63/06
Abstract: A game involving a rotating plate having triangular cutouts moving in a track on a vertical rod, with stabilizer plates on both ends of the rod and a ball.
Abstract translation: 涉及具有三角形切口的旋转板的游戏，其具有在垂直杆上的轨道中移动，在杆的两端具有稳定板和球。
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公开(公告)号：US3969671A
公开(公告)日：1976-07-13
申请号：US521646
申请日：1974-11-07
Applicant: David A. Smith
Inventor： David A. Smith
Abstract: A single probe voltmeter for determining the voltage potential of high voltage transmission lines is disclosed. The voltmeter includes a capacitor having a spherical first plate connected to the transmission line through a rectifier network. The second plate of the capacitor is formed by the physical surroundings. An ammeter is connected across the rectifier network to provide an indication of the charging current for the spherical capacitor, which charging current is essentially a function of the transmission line voltage such that the ammeter provides an indication of the voltage potential on the transmission line.
Abstract translation: 公开了用于确定高压输电线路的电压电位的单个探针电压计。 电压表包括具有通过整流器网络连接到传输线的球形第一板的电容器。 电容器的第二块由物理环境形成。 整流器网络上连接一个电流表以提供球形电容器的充电电流的指示，该充电电流基本上是传输线电压的函数，使得电流表提供传输线上的电压电位的指示。
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公开(公告)号：US09724536B1
公开(公告)日：2017-08-08
申请号：US14693561
申请日：2015-04-22
Applicant: Michael I. Rabin , David A. Smith
Inventor： Michael I. Rabin , David A. Smith
CPC classification number: A61N5/0617 , A61N2005/0626 , A61N2005/063 , A61N2005/0647 , A61N2005/0651 , A61N2005/0665 , A61N2005/067 , G02B6/429
Abstract: A phototherapy device includes a high intensity light source secured to a leaky light conducting fiber to leak light along the length of the fiber. The light fiber is illuminated at either or both ends by the light source and the light fiber is generally oriented in a 3-D spiral pattern to form a dome of light to provide phototherapy to an area of a patient's scalp to be treated. A generally hemispherical shell is formed of a first or inner translucent diffuser layer secured to a second or outer reflective layer, the first and second layers encapsulating the 3-D non-overlapping spiral pattern light fiber. A control system is also provided to turn off the light source when a break or discontinuity occurs in the fiber.
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