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    Laser bias current stabilization for burst mode fiber optic communication system
    3.
    发明授权
    Laser bias current stabilization for burst mode fiber optic communication system 失效
    用于突发模式光纤通信系统的激光偏置电流稳定

    公开(公告)号：US4709416A

    公开(公告)日：1987-11-24

    申请号：US832537

    申请日：1986-02-24

    Applicant: David R. Patterson

    Inventor： David R. Patterson

    IPC: H04B10/00 ,  G02B6/00 ,  H01S3/10 ,  H01S3/109 ,  H01S5/042 ,  H04B10/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/155 ,  H04B10/18 ,  H04B10/26 ,  H04B10/28 ,  H04L25/02 ,  H04B9/00

    CPC classification number: H04B10/564 ,  H04B10/504

    Abstract: A fiber-optic communication system for data bursts includes a plurality of nodes, each including a laser diode transmitter. In order to reduce the noise floor of the system, each laser diode receives bias current only when it is transmitting data. Due to the propagation delay between nodes, there is a dead time between data bursts received by each node during which no data signals are received. The bias current of the laser diode is adjusted following each data transmission, so that the light attributable to laser operation during the setting of bias is received during the dead time. The adjustment is accomplished by stepping an up-down counter by one clock pulse following transmission of each data burst.

    Abstract translation: 用于数据突发的光纤通信系统包括多个节点，每个节点包括激光二极管发射器。 为了降低系统的本底噪声，每个激光二极管仅在发送数据时才接收偏置电流。 由于节点之间的传播延迟，在每个节点接收到的数据突发之间存在死区时间，在该时间段内没有接收到数据信号。 在每次数据传输之后调整激光二极管的偏置电流，使得在死区设置期间归因于激光器操作的光在死区时间内被接收。 通过在每个数据脉冲串的传输之后，通过一个时钟脉冲将一个升降计数器递增来完成调整。

    Dry material dispensing apparatus
    5.
    发明授权
    Dry material dispensing apparatus 失效
    干料分配装置

    公开(公告)号：US6056027A

    公开(公告)日：2000-05-02

    申请号：US175492

    申请日：1998-10-20

    Applicant: David R. Patterson

    Inventor： David R. Patterson

    IPC: B65B1/32 ,  B65B39/00 ,  G01G13/02 ,  B65B1/04

    CPC classification number: B65B1/32 ,  B65B39/003 ,  G01G13/024

    Abstract: An apparatus and method for accurately measuring and dispensing dry material into a portable container. The apparatus includes a frame with a material hopper connected thereto. An arm member with a valve mounted thereto is rotatably connected to the frame and the valve communicates with an outlet in the hopper. A funneling member is positioned proximate to the valve and is also connected to the arm member. Rotation of the arm member opens and closes the valve and also produces substantially vertical movement of the funneling member therewith. The funneling member includes a chute depending downwardly therefrom that inserts into the container opening when a container being filled is placed in the apparatus. The container is placed on a scale which communicates with an attached controller. The controller communicates with an actuator which rotates the arm member and thereby controls movement of the valve and the funneling member. The controller signals the actuator to close the valve at a time when the weight of the container reads a predetermined amount less than the desired amount. As the valve closes, the flow rate of material gradually slows. The valve is sealed at a time corresponding to the weight of the container reaching the desired amount.

    Abstract translation: 一种用于将干燥材料精确测量和分配到便携式容器中的装置和方法。 该装置包括具有与其连接的料斗的框架。 具有安装在其上的阀的臂构件可旋转地连接到框架，并且阀与料斗中的出口连通。 漏斗构件定位成靠近阀门并且还连接到臂构件。 臂构件的旋转打开和关闭阀，并且还使漏斗构件与其大致垂直运动。 漏斗构件包括从其向下悬垂的斜槽，当将填充的容器放置在装置中时，该斜槽插入容器开口中。 将容器放置在与附接的控制器通信的秤上。 控制器与使臂构件旋转的致动器连通，从而控制阀和漏斗构件的运动。 当容器的重量读取小于所需量的预定量时，控制器用信号通知致动器关闭阀门。 随着阀门关闭，材料的流速逐渐减慢。 在对应于容器的重量达到所需量的时间，阀被密封。

    Hand powered liquid chemical measuring and dispensing system
    7.
    发明授权
    Hand powered liquid chemical measuring and dispensing system 失效
    手动液体化学测量和分配系统

    公开(公告)号：US06045010A

    公开(公告)日：2000-04-04

    申请号：US93759

    申请日：1998-06-09

    Applicant: David R. Patterson

    Inventor： David R. Patterson

    IPC: A01M7/00 ,  B65B31/00

    CPC classification number: A01M7/0092

    Abstract: A hand-powered apparatus and method for measuring and dispensing a predetermined volume of liquid. A predetermined volume of liquid is selected using a control knob on the apparatus and a valve is moved to a fill position. The handle on an attached hand pump is then moved alternately up and down causing fluid to be drawn into a measuring vessel. Further upward movement of the handle is prevented upon the fluid level in the vessel reaching the selected volume. Thereupon, the valve is moved to a dispense position whereby continued pumping of the handle is again possible. The handle is alternately pumped up and down causing the fluid to exit the vessel.

    Abstract translation: 一种用于测量和分配预定体积的液体的手动设备和方法。 使用装置上的控制旋钮选择预定体积的液体，并且阀被移动到填充位置。 然后，连接的手动泵上的手柄交替上下移动，导致流体被拉入测量容器。 当容器中的液面达到所选择的体积时，防止把手的进一步向上移动。 于是，阀被移动到分配位置，从而再次可能地抽吸手柄。 手柄交替地上下泵送，导致流体离开容器。

    Switched bias scheme for high speed laser transmitter
    8.
    发明授权
    Switched bias scheme for high speed laser transmitter 失效
    高速激光发射机的开关偏置方案

    公开(公告)号：US4558465A

    公开(公告)日：1985-12-10

    申请号：US533774

    申请日：1983-09-19

    Applicant: Stefan A. Siegel ,  David R. Patterson ,  Donald J. Channin ,  Joseph B. Sergi, Jr. ,  Jeffrey P. Viola

    Inventor： Stefan A. Siegel ,  David R. Patterson ,  Donald J. Channin ,  Joseph B. Sergi, Jr. ,  Jeffrey P. Viola

    IPC: H04B10/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/155 ,  H04B10/26 ,  H04B10/28 ,  H04B9/00

    CPC classification number: H04B10/564 ,  H04B10/504

    Abstract: In a system for transmitting two level data bursts on a fiber optic (FO) bus, a circuit for turning on a light emitting diode to an excitation level induced by a current I.sub.B corresponding to the knee of the diode characteristic curve and increasing the emitted light in response to a second increasing excitation current over a second portion of the curve beyond the knee extending from excitation level I.sub.B to excitation level I.sub.M. The circuit includes first logic for exciting the diode by the first current, a light responsive device for determining when the emitted light reaches the intensity represented by the knee of the curve and induced by I.sub.B, and logic for reproducibly storing I.sub.B. Second logic responds to the excitation of the diode to the knee of its curve to further excite the diode with the second excitation current until the diode emits a desired light intensity induced by I.sub.B +I.sub.M. Logic is provided for reproducibly storing a signal I.sub.M. Switching logic supplies the current I.sub.M to the diode in response to the data bursts and supplies I.sub. B to the diode substantially concurrently with the data bursts. In the absence of the data bursts the current level I.sub.B is reduced to substantially zero.

    Abstract translation: 在用于在光纤（FO）总线上发送两级数据脉冲串的系统中，用于将发光二极管接通到由对应于二极管特性曲线的拐点的电流IB感应的激励电平的电路，并增加发射的光 响应于超过膝盖的曲线的第二部分上的第二增加的激励电流从激励电平1B延伸到激励电平IM。 电路包括用于通过第一电流激励二极管的第一逻辑，光响应装置，用于确定发射光何时达到由IB引导的曲线的膝盖表示的强度，以及用于可重复存储IB的逻辑。 第二逻辑响应二极管对其曲线的拐点的激励，以进一步用第二激励电流激励二极管，直到二极管发射由IB + IM引起的期望的光强度。 提供了用于可再现地存储信号IM的逻辑。 开关逻辑将电流IM提供给二极管，以响应于数据脉冲串，并将I B与数据脉冲串基本同时地提供给二极管。 在没有数据脉冲串的情况下，电流电平IB被减小到基本为零。

    Temperature compensated bias circuit for semiconductor lasers
    9.
    发明授权
    Temperature compensated bias circuit for semiconductor lasers 失效
    用于半导体激光器的温度补偿偏置电路

    公开(公告)号：US4243952A

    公开(公告)日：1981-01-06

    申请号：US955625

    申请日：1978-10-30

    Applicant: David R. Patterson

    Inventor： David R. Patterson

    IPC: H01S5/068 ,  H01S3/13

    CPC classification number: H01S5/068

    Abstract: Within a power supply circuit for a semiconductor laser, output current is maintained constant at each temperature level over an operating range and the magnitude of that constant current is varied directly with temperature to maintain the light output of the laser substantially constant over the operating temperature range. In the preferred embodiment, the negative temperature coefficient characteristic of the base-emitter junction voltage for bipolar transistors is utilized to compensate for the negative temperature coefficient characteristic of the light output from the semiconductor laser.

    Abstract translation: 在用于半导体激光器的电源电路中，输出电流在工作范围内的每个温度水平保持恒定，并且恒定电流的大小直接随着温度变化，以保持激光的光输出在工作温度范围内基本上恒定 。 在优选实施例中，用于双极晶体管的基极 - 发射极结电压的负温度系数特性用于补偿从半导体激光器输出的光的负温度系数特性。

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