Block And Interlocking Signals: What They Are For, What They Do, How They Do It
Block And Interlocking Signals: What They Are For, What They Do, How They Do It
W. H. Elliott
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& H. R. R. R. Operating. Maintenance : Wages, batterymen, electricians, line- men, etc Battery supplies Breakage, etc. (including incidentals and tower supplies) Total Patenall System. Tele- grraph. 8 25 2 25 75 $111 25 Not Tele- graph. $80 00 8 25 2 25 75 $91 25 Old Sykes System. Tele- graph. $100 00 7 50 I 75 25 $109 50 Not Tele- graph. $80 00 7 50 I 75 25 $89 50 141 On this road the signal towers were so located that interlock- ing machines could be put in and the block operators made to thr...ow switches, and perform other work besides that of blocking trains. On the Erie road the instruments are placed inside many of the stations, where the man employed to work the signals could be given other work. The cost of the Hall automatic track-circuit system applied to a single-track road, with the blocks two miles long, is about $800 per block, or $40,000 for the 100 miles. For a road having double tracks, the cost will be $60,000, the blocks also being two miles long. For operation and maintenance, including battery supplies, etc., we have — For single track, per month $400 co ' ' double ** ' * 500 00 As the total cost of the system for one year we have: For single track — Interest on $40 000 at 6^ I2.400 00 Operation and maintenance 4.800 00 Total 17,20000 For double track — Interest on |6o, 000 at 6^ .
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