Not long after electrical power was first harnessed, trolley cars began carrying passengers, getting their electric power from overhead wires. The trolley’s pantograph makes contact with the electrified wire to send power to the motor that turns its wheels. By the 1920s, 17,000 miles of wire-linked electric streetcar lines ran through American cities. Today, the […]

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March 10, 2024 at 03:33AM