1472646 Vehicle control ERNST WAGNER KG 28 Aug 1974 [4 Sept 1973] 37593/74 Heading B7N In an arrangement for preventing collisions between vehicles moving in the same direction on a track 1 each vehicle carries a transmitter arrangement 11, 12 operable at frequency f1 which continuously transmits to part 3 of the adjacent one of a series of trackside loops 2 and this signal actuates via amplifier 6 a relay 8 whereby a signal at frequency f2 from signal generator 13 is applied to the rearward part 4 of the loop to be received by a receive arrangement 16, 17 of any vehicle following the first too closely whereby the power supply to the drive motor 21 of this following vehicle is discontinued. Fig. 3 (not shown) illustrates the arrangement in use at a track intersection.
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机译：1472646车辆控制装置ERNST WAGNER KG 1974年8月28日[1973年9月4日] 37593/74标题B7N在一种用于防止在同一方向上在轨道1上行驶的车辆之间发生碰撞的装置中，每辆车均带有发射器装置11、12，该发射器装置的工作频率为f1，连续地发送到一系列轨道旁环路2的相邻环路的第3部分，该信号通过放大器6激活继电器8，从而将来自信号发生器13的频率为f2的信号施加到环路的后部4，以便由环路接收紧随第一车辆的任何车辆的接收装置16、17，由此中断了向该随后车辆的驱动马达21的供电。图3（未示出）示出了在轨道交叉点处使用的布置。
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