A double-curve suspension. This type of suspension is used for trolleys on hilly or uneven roads that cause the trolley to sway. The suspension eases the tension of the trolley wire and makes the trolley a smoother ride.
International Correspondence Schools A Textbook on Electric Lighting and Railways (Scranton, PA: International Textbook Company, 1901)
2831×641, 311.7 KiB
1024×231, 30.3 KiB
640×144, 15.0 KiB
320×72, 4.8 KiB