Williams, Henry Smith, 1863-, Williams, Edward Huntington, 1868-1944, joint author · New York and London, The Goodhue company · leaf 324
are geared to the truck |axles, either inside or outside the locomotive frame.An overhead copper wire supplies the current by con-tact with a grooved trolley wheel mounted on the endof the regulation trolley pole. An electric headlightis used, and the ordinary speed attained by the com-pact motors… … W M^ THE MINERAL DEPTHS Pennsylvania mine hauled about 150,000 tons of coalin a year at a cost of less than one-tenth of a cent perton for repairs. The usual train was made up ofthirty-five cars, each loaded with about 3,700 poundsof coal, which was hauled up a three-per-cent grade.The cost of such…
Industrial arts · Machinery
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