Growing up, seeing a neon Paul Revere ride his red horse through the sky meant that Eve Hartig was almost home. The same image enchanted generations of kids from New Bedford since the late 1940s, when Revere Copper and Brass Inc. installed a 40-foot by 25-foot neon sign on a factory roof. By the time Hartig was born, the sign had a new perch over Interstate 195. Then, one day in 2014, the sign disappeared. “It’s strange.