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    • 5. 发明授权
    • Multiple device control system
    • 多设备控制系统
    • US5142277A
    • 1992-08-25
    • US473678
    • 1990-02-01
    • Scott H. YarberryRobert E. RectorLarry T. TaylorJames K. AlexandersonDavid M. Albert
    • Scott H. YarberryRobert E. RectorLarry T. TaylorJames K. AlexandersonDavid M. Albert
    • B60L3/00B61L15/00G05D1/02
    • B61L15/0045
    • A train communication and control system is described having the cars of the train connected by a two-wire train line running continuously from car to car. Any car may be selected to be a master unit. The selection of one car as a master unit disconnects the power sources of all other cars from the train line, leaving the master unit power source as the sole power source for the line. The master unit communicates with each other car by causing a high voltage ("mark" state or logic one) or a low voltage ("space" state or logic zero) to be on the train line. Each non-master car can receive a communication from the master unit, or can transmit to another car by applying a low impendance across the train line to change from a "mark" state to a "space" state. The power source consists of a voltage regulator with precision constant current limit. Output voltage is maintained substantially constant until a load greater than the rated current limit causes the power source to change to a substantially constant current regulator, whereby its regulated voltage falls rapidly to the "space" state voltage.
    • 描述了一种列车通信和控制系统,其具有通过从汽车到汽车连续运行的两线列车连接的列车的列车。 任何一辆汽车都可能被选为主机。 选择一辆汽车作为主机将所有其他车辆的电源从火车线路断开,将主机电源留作线路的唯一电源。 主单元通过使高压(“标记”状态或逻辑1)或低电压(“空间”状态或逻辑0)在列车线上相互通信。 每个非主车可以接收来自主单元的通信,或者可以通过在列车线路上施加低阻抗而将其从“标记”状态改变到“空间”状态来发送到另一车辆。 电源由精密恒流限制的电压调节器组成。 输出电压保持基本恒定,直到大于额定电流限制的负载导致电源变为基本恒定的电流调节器,由此其调节电压迅速下降到“空间”状态电压。
    • 10. 发明授权
    • Alloy substitute for mercury in switch applications
    • 开关应用中汞的合金替代品
    • US5391846A
    • 1995-02-21
    • US022118
    • 1993-02-25
    • Larry T. TaylorJames RancourtCarlos Perry, Jr.
    • Larry T. TaylorJames RancourtCarlos Perry, Jr.
    • H01H1/08H01H29/06H01H35/14
    • H01H29/06
    • With proper handling, Gallium-Indium-Tin eutectics are suitable for use as a substitute for mercury in switch applications. The eutectics should be acid washed to prevent oxidation of the metal components of the eutectic while in the switch housing and, further, the switch housing should be filled with an inert gas. Preventing oxidation ensures long term performance of the switch. In addition, provisions need to be made to prevent wetting of the switch housing by the eutectic. Experiments have shown that acid washing of metallic switch housings prior to adding the Gallium-Indium-Tin eutectic reduces or eliminates wetting by the eutectic. In addition, experiments have shown that coating the walls of the switch housing with a fluoropolymer coating prevents wetting by the eutectic.
    • 通过适当的处理,镓 - 铟锡共晶体适用于开关应用中的汞替代品。 应该将共晶体进行酸洗以防止在开关壳体中共晶体的金属部件的氧化,此外,开关壳体应填充惰性气体。 防止氧化确保开关的长期性能。 另外,需要规定防止开关壳体由共晶体的润湿。 实验表明,在添加镓铟锡共晶体之前,金属开关外壳的酸洗可减少或消除共晶体的润湿。 此外,实验已经表明,用氟聚合物涂层涂覆开关壳体的壁防止了共晶体的润湿。