Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 694
RAILROADS, STREET. 663 BB are two brakes operated by chains cc, which wind on the brake-spindle A. At P P are twogrooved rollers, placed so as to embrace the rope. L L are two links connecting the brakes androllers. The apparatus is secured under the car in a frame F. To start the car, the brakes… … by the retardation due to the pressure. When the revolution of the rollers is wholly stopped, thecar acquires the full speed of the rope. Underground Railroads.—In London, England, the underground system of railroads has beenin operation since 1863, when a section of 3£ miles was opened. The track…
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