With her husband (Thomas Davenport), and his colleague (Orange Smalley), she invented the electric motor and electric locomotive circa 1834.
She cut up her wedding dress into strips of silk to insulate the wire windings.
Further Reading Frank Wicks. "The Blacksmith's Motor. Electricity, magnetism, and motion: A self-taught Vermonter pointed the direction for lighting the world." Mechanical Engineering, July 1999.