. Locomotive engineering : a practical journal of railway motive power and rolling stock . t being very slight. Visible indicators, worked by the signalcircuit, should be placed at all switches onthe main line, so that if an approachingtrain has arrived within a certain distanceof the signal at the entrance of the block,the indicator will be set at danger, andwarn anyone desiring to use the switchthat a train is approaching. Automaticsignals should be located entirely with reference to the character of the road andthe number of trains that are run, theidea being to so space the signals as toma
. Locomotive engineering : a practical journal of railway motive power and rolling stock . t being very slight. Visible indicators, worked by the signalcircuit, should be placed at all switches onthe main line, so that if an approachingtrain has arrived within a certain distanceof the signal at the entrance of the block,the indicator will be set at danger, andwarn anyone desiring to use the switchthat a train is approaching. Automaticsignals should be located entirely with reference to the character of the road andthe number of trains that are run, theidea being to so space the signals as tomake the running time through eachblock about the same. The plan of put-ting the signals very close together, ifthere are curves in the track, and very farapart where the signals can be seen, is avery poor arrangement, as it will oftenhappen, owing to fog, snow or storms, thatthe signal cannot be seen until quite closeto it, in which case trains following eachother would be spaced the distance of thelongest block apart, and not that of theshortest. In placing signals at the entrance of a. block, it is a very good plan to put thesignal a short distance beyond the begin-ning of the track circuit, so that the sig-nal will go to danger before the engineerpasses it, thus letting him see that it isworking properly. Where this is done,any engineer stopping because the signalis at danger must be careful not to let histrain run into the section controlling thesignal, or the signal will not change tosafety when the train keeping the signal atdanger passes out of block. i i i Not According to Common Sense. A correspondent objects to statementsmade in an article that appeared in theJanuary number of LocoMOTrvE Engi-neering, concerning the varied tempera-ture of the cylinders of a steam engine whenat work. He says that it is all very well towrite about these fine-drawn theories, butthat a practical man knows that they areabsurd. To teach that a change of 120°in the cylinder temperature takes
Size: 1918px × 1303px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
