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    • 1. 发明授权
    • Systems for retarding the speed of a railcar
    • 用于延缓轨道车速度的系统
    • US08899385B2
    • 2014-12-02
    • US13117217
    • 2011-05-27
    • Andrew J. FrailingJames E. Thompson
    • Andrew J. FrailingJames E. Thompson
    • B61K7/02B61K7/08
    • B61K7/08
    • Systems for retarding the speed of a railcar comprise: a brake; a hydraulic actuator moving the brake between a closed position in which the brake applies braking pressure on a wheel of the railcar and an open position in which the brake does not apply braking pressure on the wheel of the rail car; a hydraulic circuit comprising a first manifold and a second manifold; a pump configured to pump hydraulic fluid into at least one of the first manifold and the second manifold; and a logic element controlling pressure of the fluid in the first manifold such that when the wheel enters the brake and forces the brake towards the open position. The logic element reacts to maintain a selected pressure in the first manifold, thus causing a selected braking pressure to be applied by the brake on the wheel of the railcar.
    • 用于延缓轨道车速度的系统包括:制动器; 液压致动器使制动器在关闭位置之间移动,在该关闭位置,制动器对轨道车辆的车轮施加制动压力,并且制动器不在轨道车辆的车轮上施加制动压力的打开位置; 液压回路,包括第一歧管和第二歧管; 泵,构造成将液压流体泵送到第一歧管和第二歧管中的至少一个; 以及逻辑元件,其控制第一歧管中的流体的压力,使得当车轮进入制动器并迫使制动器朝向打开位置时。 逻辑元件反应以在第一歧管中保持选定的压力,从而使制动器的选定制动压力施加在轨道车辆的车轮上。
    • 2. 发明申请
    • Systems for Retarding the Speed of a Railcar
    • 减轻铁路车辆速度的系统
    • US20110315491A1
    • 2011-12-29
    • US13117217
    • 2011-05-27
    • Andrew J. FrailingJames E. Thompson
    • Andrew J. FrailingJames E. Thompson
    • B61K7/08B61K7/02B60T13/16
    • B61K7/08
    • Systems for retarding the speed of a railcar comprise: a brake; a hydraulic actuator moving the brake between a closed position in which the brake applies braking pressure on a wheel of the railcar and an open position in which the brake does not apply braking pressure on the wheel of the rail car; a hydraulic circuit comprising a first manifold and a second manifold; a pump configured to pump hydraulic fluid into at least one of the first manifold and the second manifold; and a logic element controlling pressure of the fluid in the first manifold such that when the wheel enters the brake and forces the brake towards the open position. The logic element reacts to maintain a selected pressure in the first manifold, thus causing a selected braking pressure to be applied by the brake on the wheel of the railcar.
    • 用于延缓轨道车速度的系统包括:制动器; 液压致动器使制动器在关闭位置之间移动,在该关闭位置,制动器对轨道车辆的车轮施加制动压力,并且制动器不在轨道车辆的车轮上施加制动压力的打开位置; 液压回路,包括第一歧管和第二歧管; 泵,构造成将液压流体泵送到第一歧管和第二歧管中的至少一个; 以及逻辑元件,其控制第一歧管中的流体的压力,使得当车轮进入制动器并迫使制动器朝向打开位置时。 逻辑元件反应以在第一歧管中保持选定的压力,从而使制动器的选定制动压力施加在轨道车辆的车轮上。
    • 6. 发明授权
    • Slow speed driver with controlled slew rate
    • 缓速驱动器,具有受控的转换速率
    • US5757217A
    • 1998-05-26
    • US672412
    • 1996-06-28
    • James E. Thompson
    • James E. Thompson
    • H03K19/003H03K17/16H03F3/26H03K6/04
    • H03K19/00361
    • A driver circuit for transmitting data via an output node thereof to a transmission line includes a first driving device coupled to the output node and a second driving device coupled to the same output node. The driver circuit further includes a slew rate controller coupled to the first and second driving devices. The slew rate controller includes a first reference device coupled to the first driving device. The first reference device generates a first current. The slew rate controller also includes a second reference device coupled to the second driving device. The second reference device generates a second current. The slew rate controller further includes a summing device, coupled to the first and second reference devices. The summing node is also coupled to the output node, via an integrating device, to the output node. The summing device generates at the output node a slew rate proportional to the first current when the first driving device is substantially conducting. The summing device also generates at the output node a slew rate proportional to the second current when the second driving device is substantially conducting.
    • 用于经由其输出节点将数据发送到传输线的驱动器电路包括耦合到输出节点的第一驱动装置和耦合到相同输出节点的第二驱动装置。 驱动器电路还包括耦合到第一和第二驱动装置的压摆率控制器。 压摆率控制器包括耦合到第一驱动装置的第一参考装置。 第一参考装置产生第一电流。 压摆率控制器还包括耦合到第二驱动装置的第二参考装置。 第二参考装置产生第二电流。 压摆率控制器还包括耦合到第一和第二参考装置的求和装置。 求和节点还经由积分装置耦合到输出节点到输出节点。 所述求和装置在所述输出节点处产生与所述第一驱动装置基本导通时的与所述第一电流成正比的压摆率。 求和装置还在输出节点产生与第二驱动装置基本导通时的与第二电流成比例的转换速率。