International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 534
ldprevent its use in the main track at yards, and at terminalswhere trains move slowly, as well as at intermediate pointswhere trains run at top speed. A double-throw split sw^itch has been invented and usedin a limited way, and though a perfect switch so far as mech-anism is concerned, it is much… … \oSi Fig. 5»4. switches, placed as close together as is consistent with theirsafe operation. Such an arrangement is shown in Fig. 534,in which a a and /; // are the rails of the main track. A7° 30 turnout curve c c is laid out to the right of the maintrack. This calls for a head block at c and a…
Railroad engineering
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