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    • 1. 发明授权
    • Apparatus and method for closed-loop, thermal control of printing head
    • 打印头闭环,热控制的装置和方法
    • US5132709A
    • 1992-07-21
    • US749923
    • 1991-08-26
    • David A. West
    • David A. West
    • B41J2/355B41J2/365
    • B41J2/365B41J2/355
    • The heating elements of a thermal printing head are respectively driven through drive transistors under the control of strobe pulses and are respectively provided with temperature control circuits, each such circuit including a sense resistor connected in series between the heating element and the drive transistor for sensing the current flow therethrough. Each control circuit has a flip-flop which is clocked by an associated strobe signal to turn on the corresponding drive transistor. The voltage drop across the sense resistor of each control circuit is amplified and compared to a reference level corresponding to a predetermined temperature, and when it exceeds the reference it resets the associated flip-flop to turn off the corresponding drive transistor.
    • 热敏打印头的加热元件分别在选通脉冲的控制下通过驱动晶体管驱动,并且分别设置有温度控制电路,每个这样的电路包括串联连接在加热元件和驱动晶体管之间的感测电阻器,用于感测 电流流经其中。 每个控制电路具有触发器,触发器由相关的选通信号计时,以导通相应的驱动晶体管。 每个控制电路的检测电阻上的电压降被放大并与对应于预定温度的参考电平进行比较,并且当它超过参考时,它复位相关的触发器以关断对应的驱动晶体管。
    • 2. 发明授权
    • Modular data sensing and logging system
    • 模块化数据检测和记录系统
    • US06532434B1
    • 2003-03-11
    • US09585863
    • 2000-06-01
    • David A. West
    • David A. West
    • G06F1500
    • G01D9/005
    • An apparatus and method for the periodic acquisition of data through the use of sensors and/or electronic interfaces. The apparatus is modular, having a control module and one or more A acquisition modules interconnected with a module bus. The control module provides timing and control information to the acquisition modules, as well as an interface for communication to a host computer. Each acquisition module contains circuitry to make measurements of one or more physical property and convert the measurements into digital values. Temperature, altitude, airspeed, engine speed, gravitational force, pulse width, and voltage are examples of physical values that may be measured. Each acquisition module also contains electronic memory in which the digital values are stored. In operation the control module keeps track of elapsed time and periodically signals the acquisition modules to make readings and store values. When data logging is complete, the system is attached to the host computer and the data stored in each acquisition module is transferred for analysis. Calibration values for correction of sensor gain, offset, linearity, or other factors may be stored in a separate parameter area within each acquisition module's memory. These values can then be used by the host computer to adjust and
    • 一种用于通过使用传感器和/或电子接口来定期地获取数据的装置和方法。 该装置是模块化的,具有控制模块和与模块总线互连的一个或多个A采集模块。 控制模块向采集模块提供定时和控制信息,以及用于与主机通信的接口。 每个采集模块包含用于测量一个或多个物理属性并将测量值转换为数字值的电路。 温度,高度,空速,发动机速度,重力,脉冲宽度和电压是可以测量的物理值的示例。 每个采集模块还包含存储数字值的电子存储器。 在操作中,控制模块跟踪经过的时间并周期性地向采集模块发出信号以进行读数和存储值。 数据记录完成后,将系统连接到主计算机,并将存储在每个采集模块中的数据传输进行分析。 用于校正传感器增益,偏移,线性度或其他因素的校正值可存储在每个采集模块存储器中的单独参数区域中。 这些值然后可以被主机用来调整和
    • 7. 发明授权
    • Acoustic thermometer
    • 声温计
    • US5624188A
    • 1997-04-29
    • US326542
    • 1994-10-20
    • David A. West
    • David A. West
    • G01K11/24G01K11/22
    • G01K11/24
    • A thermometer using the temperature dependance of the speed of sound, measures the average temperature along a path traversing an open environment containing a medium. A transmitting transducer, coupled to a signal generator and placed at a first point in the medium, produces a burst of sound of predetermined frequency and duration. The sound burst travels through the medium to a second point, located a predetermined distance from the first. At the second point, a passive sound reflector, or an active apparatus, produces a returning sound burst. A receiving transducer, positioned close to the transmitting transducer, receives the returned sound. A detection circuit, coupled to the receiving transducer, indicates the presence of the returned sound burst. A timer, with connections to the signal generator and the detection circuit, measures the elapsed time for the round trip of the sound. The resulting time measurement is an indicator of the average temperature along the path between the first and second points. This time measurement is output for use by an electronic system, or processed to represent temperature directly.
    • 使用温度与声速相关的温度计,测量穿过包含介质的开放环境的路径的平均温度。 耦合到信号发生器并放置在介质中的第一点处的发射换能器产生预定频率和持续时间的声音脉冲串。 声音突然传播通过介质到位于距离第一点预定距离的第二点。 在第二点,无源声音反射器或有源设备产生返回的声音突发。 靠近发射换能器的接收换能器接收返回的声音。 耦合到接收换能器的检测电路指示返回的声音突发的存在。 一个连接到信号发生器和检测电路的定时器测量了声音往返的经过时间。 所得到的时间测量是沿着第一和第二点之间的路径的平均温度的指示。 该时间测量输出供电子系统使用,或直接处理以表示温度。
    • 8. 发明授权
    • Line installation tool
    • 线路安装工具
    • US06244261B1
    • 2001-06-12
    • US09316743
    • 1999-05-21
    • David A. West, Jr.
    • David A. West, Jr.
    • F41B1106
    • F41B11/62F42B12/68
    • A hand-held apparatus for projecting a line across an intermediate span includes a launching tube having one end connected to a source of propellant gas energy for launching a projectile, the other end forming an open muzzle adapted to receive and fire a line deploying projectile. The projectile is releasably attached to one end of the line attached to a source of line connected to the launch tube and containing a supply of line to be payed out during the flight of the projectile. An axially-mounted laser sighting device connected to the launch tube for sighting the tube in on a remote target for the projectile is also provided.
    • 用于在中间跨度上投影线的手持式装置包括一个发射管,其一端连接到用于发射抛射体的推进剂气体能源,另一端形成适于接收和发射线路部署射弹的开口枪口。 抛射体可释放地附接到连接到发射管的线路的一端的线的一端,并且在射弹的飞行期间包含要支付的线路的供应。 还提供了一种连接到发射管的轴向安装的激光瞄准装置,用于将管瞄准在用于射弹的远程目标上。
    • 10. 发明授权
    • Thermal demand printer
    • 热需求打印机
    • US5874980A
    • 1999-02-23
    • US791448
    • 1997-01-27
    • David A. West
    • David A. West
    • B41J2/325B41J2/32B41J2/35B41J2/355B41J2/36B41J2/365B41J3/36B41J5/30B41J15/16B41J17/02B41J17/24B41J17/32B41J17/42B41J25/304B41J25/316B41J29/00B41J29/02B41J29/13B41J29/38B41J29/46B41J33/14B41J33/16B41J33/22B41J33/34B65C11/02B65H18/00B65H19/12B65H75/22G07B1/00B41J2/38
    • B41J2/325B41J17/02B41J17/24B41J17/42B41J2/355B41J2/365B41J25/304B41J25/316B41J29/02B41J29/38B65C11/0289B65C2210/0027B65C2210/0029Y10T16/525Y10T16/5257
    • A thermal demand printer for printing on media is a novel system which includes a case structure including a hinged cover panel, easily removable guide structures and media hanger, and a single central support wall to which the various components are attached. The printer includes a power supply circuit for receiving power from an external source and conditioning it for operation of the printer. An input device is provided for receiving command signals related to the operation of the printer. A control circuit for processing the command signals and generating corresponding control signals for controlling the operation of the printer and a printhead assembly for processing the control signals and generating corresponding control signals for controlling the operation of the printer are mounted in the case structure and coupled to the input device and the power supply circuit. The printhead assembly includes a printhead support structure which controls the printhead. A ribbon take-up spindle, method of operating the take-up spindle using a PMDC motor, and a spring wrap clutch device help to control the tension in the transfer ribbon used in the printer. The printer also includes a medial sensor and a method of sensing media by way of detecting the opacity of the media passing through the sensor. The printer includes a method of printhead control using double data loading and a method of accelerating and decelerating media relative to the printhead using pulse width modulation.
    • 用于在介质上打印的热需求打印机是一种新颖的系统,其包括壳体结构,其包括铰接盖板,易于拆卸的导向结构和介质悬挂器,以及单个中心支撑壁,各个部件附接到该中心支撑壁。 打印机包括用于从外部源接收电力并对其进行调理以用于打印机的操作的电源电路。 提供输入装置用于接收与打印机的操作有关的命令信号。 用于处理命令信号并产生用于控制打印机的操作的相应控制信号的控制电路和用于处理控制信号并产生用于控制打印机操作的相应控制信号的打印头组件安装在壳体结构中并耦合到 输入设备和电源电路。 打印头组件包括一个控制打印头的打印头支撑结构。 带状卷取轴,使用PMDC电机操作卷取轴的方法以及弹簧卷绕离合器装置有助于控制打印机中使用的转印带中的张力。 打印机还包括内侧传感器和通过检测通过传感器的介质的不透明度来感测介质的方法。 打印机包括使用双重数据加载的打印头控制方法和使用脉冲宽度调制相对于打印头加速和减速介质的方法。