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    Detection of end zones in alternating track circuits
    1.
    发明授权
    Detection of end zones in alternating track circuits 失效
    在交替跟踪电路中检测终端区

    公开(公告)号：US3663809A

    公开(公告)日：1972-05-16

    申请号：US3663809D

    申请日：1970-05-04

    Applicant: GEN SIGNAL CORP

    Inventor： SIBLEY HENRY C

    IPC: B61L1/18 ,  B61L23/30

    CPC classification number: B61L1/187

    Abstract: A continuous rail track circuit apparatus having termination shunts at each end detects the presence of a railroad vehicle shunt across the rails and indicates vehicle presence. Shunt means near one end of the track circuit periodically introduces a test shunt across the track, and receiver means coupled to the rails near the other end of the track circuit is sensitive to changes in track circuit parameters occasioned by the test shunt and respondingly introduces a reply test shunt in accordance with the period of the shunt means. Means at the first end of the circuit sensitive to changes in track circuit parameters occasioned by the reply test shunt provides indication of vehicle presence when the change in track circuit parameters ceases.

    Abstract translation: 在每端具有终端分流的连续轨道电路装置检测铁路车辆分流在轨道上的存在，并指示车辆存在。 在轨道电路的一端附近的并联装置周期性地在轨道上引入测试分路，并且耦合到轨道电路另一端附近的轨道的接收机装置对由测试分流引起的轨道电路参数的变化敏感，并且响应地引入 按照分流方式回复测试分流。 在回路测试分流引起的跟踪电路参数变化敏感的电路意味着当跟踪电路参数的变化停止时提供车辆存在的指示。

    Hot box detector structures for railways
    2.
    发明授权
    Hot box detector structures for railways 失效
    铁箱检测器铁路结构

    公开(公告)号：US3601604A

    公开(公告)日：1971-08-24

    申请号：US3601604D

    申请日：1969-07-16

    Applicant: GEN SIGNAL CORP

    Inventor： SIBLEY HENRY C

    IPC: B61K9/06 ,  B08B3/00

    CPC classification number: B61K9/06

    Abstract: The hot box detector structure comprises a main enclosure and an upper deck enclosure. The main enclosure houses the radiometer which should be maintained at ambient temperature. For this reason, the upper deck enclosure is separated from the main enclosure by a suitable air space. It also supports a surrounding sun shade to further protect the main enclosure of the structure from the direct rays of the sun and thus prevent the building up of its internal temperature above the ambient. The tower enclosure rises from one end of the main enclosure and includes a window at its top or head through which the radiometer can view the passing hot elements of a moving train. The head of such tower also includes certain operative parts such as a shutter for the window, heating elements, shutter control, window washer and dryer, and the like. This head of the tower is heat insulated from the tower supporting structure and from the main enclosure.

    Combined high and low frequencies for track circuit
    4.
    发明授权
    Combined high and low frequencies for track circuit 失效
    用于跟踪电路的组合高低频

    公开(公告)号：US3670161A

    公开(公告)日：1972-06-13

    申请号：US3670161D

    申请日：1970-05-04

    Applicant: GEN SIGNAL CORP

    Inventor： SIBLEY HENRY C

    IPC: B61L1/18 ,  B61L23/30

    CPC classification number: B61L1/187

    Abstract: A continuous rail alternating current track circuit has been provided having shunts at extreme ends for terminating the circuit. A track transmitter is coupled to the rails for center feeding the circuit with a first signal having an associated effective range less than the distance to the shunt. The improvement for providing accurate detection of a vehicle shunt between the termination shunt and the end of the effective range of the signal includes a transmitter located at each end of the track circuit coupled to the rails for propagating a second signal at least to the range end of the first signal. Means at the range end of the second signal modulates the first and second signals in the rails to high and low side-band frequencies and a detector means at each end of the track circuit responds to at least one side-band frequency for detecting the modulated frequency and providing indication of vehicle presence when the side-band frequency is interrupted.

    Abstract translation: 已经提供了一个连续的轨道交流跟踪电路，其在末端具有分路以终止电路。 轨道发射器被耦合到轨道，用于使得具有小于到分流器的距离的相关联的有效范围的第一信号中心馈送电路。 用于提供在终端分流器与信号的有效范围结束之间的车辆分流器的精确检测的改进包括位于轨道电路的每个端部处的发射器，该发射器耦合到轨道，用于至少将范围末端传播第二信号 的第一个信号。 在第二信号的范围结束处的装置将轨道中的第一和第二信号调制到高和低边带频率，并且轨道电路的每一端处的检测器装置响应于至少一个边带频率，用于检测调制 并且当边带频率中断时提供车辆存在的指示。

    Fail-safe logic circuitry for vehicle transportation control
    8.
    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

    Applicant: GEN SIGNAL CORP

    Inventor： SIBLEY HENRY C

    IPC: B61L29/28 ,  H03K17/02

    CPC classification number: B61L29/288

    Abstract: 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.

    Abstract translation: 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。

    Ballast resistance and track continuity indicating circuit
    9.
    发明授权
    Ballast resistance and track continuity indicating circuit 失效
    镇流电阻和轨道连续性指示电路

    公开(公告)号：US3870952A

    公开(公告)日：1975-03-11

    申请号：US37966273

    申请日：1973-07-16

    Applicant: GEN SIGNAL CORP

    Inventor： SIBLEY HENRY C

    IPC: G01R27/02

    CPC classification number: G01R27/02 ,  B61L1/187

    Abstract: A track quality meter for determing ballast resistance of a track section, regardless of whether or not the track section is insulated. An oscillator produces a signal at an appropriate frequency which is applied to the track section. Detector means, connected across the track section, is responsive to the voltage across the track section. From this voltage the characteristic impedance of the track section can be determined in a number of ways. In a preferred embodiment, the signal applied across the track section is also applied across a variable resistor. By adjusting the variable resistor so that the voltage across it equals the voltage across the track section, the resistor value is a measure of the characteristic impedance of the track section at the frequency produced by the oscillator. The characteristic impedance of the track section has a number of parameters, but only the ballast resistance in the track section is variable. As a result, the ballast resistance for the track section can be read off a calibration table.

    Abstract translation: 用于确定轨道部分的镇流电阻的轨道质量计，而不管轨道部分是否被绝缘。 振荡器以适当的频率产生施加到轨道部分的信号。 跨越轨道部分连接的检测器装置响应轨道部分上的电压。 从该电压可以以多种方式确定轨道部分的特征阻抗。 在优选实施例中，施加在轨道部分上的信号也跨越可变电阻器施加。 通过调整可变电阻器使其两端的电压等于轨道部分的电压，电阻值是由振荡器产生的频率处的轨道部分的特性阻抗的量度。 轨道部分的特征阻抗具有多个参数，但只有轨道部分的镇流电阻是可变的。 结果，轨道部分的镇流电阻可以从校准表读出。

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