. The Street railway journal . sion, in orderto increase the factor of life of the green lamps, orthose with the coil in shunt, isincreased greatly by the shunt, andwill usually be 3000 hours. It will be seen that the code ofrules to be used with the systemis most simple. Every motormanknows that a red light means dan-ger and a green light means this it is only necessary tobase six rules: (i) When lightFIG. 6.—INTERMEDIATE LIGHT shows red, dont enter a block. SIGNAL (2) When light shows green, enter under control. (3) When nolight shows, enter at will. (4) When lamps fai
. The Street railway journal . sion, in orderto increase the factor of life of the green lamps, orthose with the coil in shunt, isincreased greatly by the shunt, andwill usually be 3000 hours. It will be seen that the code ofrules to be used with the systemis most simple. Every motormanknows that a red light means dan-ger and a green light means this it is only necessary tobase six rules: (i) When lightFIG. 6.—INTERMEDIATE LIGHT shows red, dont enter a block. SIGNAL (2) When light shows green, enter under control. (3) When nolight shows, enter at will. (4) When lamps fail to lighton entering a block, back out. Special rules for the running ofcars when the signals of a block are wholly or partly out of ordercan be provided by the management to meet special conditions andsystems of operation. (5) When lights go out while in block, pro-ceed with extreme caution. (6) When light shows red upon leav-ing a block, look out for trailers. If one of the green lamps burn out, the current passes through. number of green lamps in any one block exceeds the voltage ca-pacity of the signal current, the multiple connection must, of course,be used. With the multiple arrangement, one lamp main is con-nected up to the ground switch of the controller at each other lamp main is connected to the feed switch at each end. Semaphores may be used in addition to the lamps, if desired, andthe manufacturers have a system in preparation in which the cur-rent, not dependent upon lamps for continuity, first sets the farsignal and is then switched back to operate the near signal, thus se-curing the certainty that both ends of the block are guarded before
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
