The application of electricity to railway working (1897)
Langdon, William Edward, 1832-1905 · London : Spon · leaf 197
signals exhibited to drivers, i68 The Application of Electricity which signals can only be worked in conformity with the Elec-tric Block indications. (c] Signal invariably put up to Danger behind trains, astwo men can put it up, and if they fail to do so the train itselfdoes it, and then the signal… … FIG. 89. train leaves the section, and in doing so it unlocks the handleof the instrument there. (e) Interlocking mechanically the electric block instru-ments with the point and signal levers so that messages of Line clear cannot be sent and levers used for shunting atthe same time. After Line…
Railroads -- Equipment and supplies · Electric apparatus and appliances
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