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    Fail-safe logic circuitry for vehicle transportation control
    1.
    发明授权
    Fail-safe logic circuitry for vehicle transportation control 失效
    用于车辆运输控制的故障安全逻辑电路

    公开(公告)号：US3909632A

    公开(公告)日：1975-09-30

    申请号：US45289774

    申请日：1974-03-20

    申请人： GEN SIGNAL CORP

    发明人： SIBLEY HENRY C

    IPC分类号： B61L29/28 ,  H03K17/02

    CPC分类号： B61L29/288

    摘要： Logic circuitry in a vehicle transportation system, such logic circuitry providing fail-safe operation utilizing solid-state circuits. The logic circuitry is described relative to control of a highway crossing indicator, such circuitry selectively producing a most restrictive output signal or a least restrictive output signal in accordance with traffic conditions to the crossing indicator. A vital signal is generated that is characteristically differentiated from other signals in the circuit. The vital signal is serially transferred through gate circuits by corresponding enable signals to each gate circuit. When and only when the vital signal has been transferred along a path of gate circuits and through the logic circuitry, the crossing indicator assumes a least restrictive mode of operation.

    摘要翻译： 车辆运输系统中的逻辑电路，这种逻辑电路提供利用固态电路的故障保护操作。 相对于公路交叉指示器的控制来描述逻辑电路，这种电路根据交叉指示器的交通状况选择性地产生最严格的输出信号或最少限制性的输出信号。 产生与电路中的其他信号有区别的重要信号。 重要信号通过门电路通过对每个门电路的相应使能信号串行传输。 当且仅当生物信号沿着门电路的路径并通过逻辑电路传送时，交叉指示器采取最少的限制性操作模式。

    Control of multiple highway crossings
    2.
    发明授权
    Control of multiple highway crossings 失效
    多个高速公路交叉口的控制

    公开(公告)号：US3734434A

    公开(公告)日：1973-05-22

    申请号：US3734434D

    申请日：1971-06-14

    申请人： GEN SIGNAL CORP

    发明人： SMITH W

    IPC分类号： B61L29/28 ,  B61L29/32

    CPC分类号： B61L29/288

    摘要： The apparatus controls operation of highway warning devices at a plurality of crossings in accordance with the approach of a railroad vehicle and includes a computer for calculating a uniform warning time for each crossing in response to signals received from the crossings. There is means responsive to computer control at each crossing for imposing on the rails a read and check signal at different times in accordance with a selected computer sequence. Receiver means is responsive to the received signal associated with the read and check signals from each crossing and has an output feeding the computer for providing digitial intelligence signals with respect to the difference between the received signals. Means at the computer compares the intelligence signals with anticipated responses relative to the associated crossing and other relevant crossings and provides output signals in accordance with the comparison, while means responsive to the comparison means activates the warning device at each crossing a uniform time before the approach of the vehicle.

    摘要翻译： 该装置根据铁路车辆的接近来控制在多个交叉口处的公路警报装置的操作，并且包括计算机，用于响应于从交叉口接收的信号计算每个交叉口的均匀警告时间。 在每个交叉路口有响应计算机控制的装置，以根据所选择的计算机序列在不同时刻施加在轨道上的读取和检查信号。 接收机装置响应于与来自每个交叉口的读取和检查信号相关联的接收信号，并且具有馈送计算机以输出关于接收到的信号之间的差异的数字智能信号的输出。 在计算机上的手段将智能信号与相关联的交叉点和其他相关交叉口的预期响应进行比较，并且根据比较提供输出信号，而响应于比较装置的装置在每次穿过之前激活警告装置在接近之前的均匀时间 的车辆。