Improved Automatic Signal Apparatus

1894 Scientific American  
In England at this season of the year all the railway companies are more or less troubled with fogs, and the question of the best methods of dealing with the im mense traffic near the large centers of population re quires very careful consideration. 'l'he Engineer, Lon don, to which we are indebted for these illustrations and the following particulars, says: The system now generally employed is that of placing men at short dis tances apart alongside the various tracks, and the duty of these
more » ... en is to place detonators upon the rails. In order to increase the certainty of the signal ing, it is usual to place two detonators at a distance of some ten yards apart, so that in case one should fail to explode it is practically certain that the other will give the required signal. In many cases detonators are left on the rails even after the fog has cleared off, and some of the men are not averse to the work, seeing that while employed on it they obtain about three times their usual pay. In both cases there is, of course, unnecessary expense. On some lines pits are dug in the six-foot way, and the men are stationed in them and provided with open fires. This system, however, is a fruitful cause
doi:10.1038/scientificamerican01201894-41 fatcat:mbm2irzkrbc5rfqvuwwss7xp7y