Kirkman, Marshall Monroe, 1842-1921 · New York, Chicago, The World Railway Publishing Company · leaf 38
34 TEE SCIENCE OF RAILWAYS. tions. At each pole the wire is fastened to the insulator to prevent escape of the current. The insulator in general use is shaped like an inverted glass cup, mounted upon an oak pin which is attached to the pole, the line being attached to the insulator by tie wires… … GLASS INSULATOR. GLASS INSULATOR. (REGULAR PATTERN. (SPECIAL PATTERN.) each pole, the insulators attached to these being placed about twenty inches apart. The Local Circuit— The Local Circuit is what is technically termed the " short' ' circuit; it is con- fined wholly to the local battery and the…
Railroads · Transportation
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