Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules (1908)
National correspondence school of railroading, Chicago. [from old catalog] · [Chicago] · leaf 329
e would be no resistance offered to the flow ofcurrent. The circuit would be closed and the. pressureor voltage could not be dissipated. 3i8 THE ELECTRIC HEADLIGHT. If the dynamo were run in this manner for any lengthof time the coils would become hot enough to char theinsulation of the wires, and… … PLATE 139. complished by means of solenoid 65, the coil on the lamp.When an electric current flows through a coil ofwire, this coil becomes an electromagnet. The solenoidis an electromagnet, and provides the automatic mechan-ism, which feeds the carbon down as fast as it is con-sumed and maintains…
Locomotives
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