Coney Island’s historic B&B Carousell is among several vintage attractions still thrilling visitors at the famous amusement park today. What visitors may not know is that William Mangels designed and built it. Now Mangels is the subject of an exhibition at Brooklyn’s historic Green-Wood Cemetery, where he’s buried. William F. Mangels: Amusing the Masses on Coney Island and Beyond aims to give credit to the mechanical and creative genius who enthralled the masses with his carousels, shooting ranges and rides during the early part of the 20th century. From 1890 until his death in 1958, Mangels patented more than 50 inventions, including the mechanism that’s still used today to get carousel horses jumping up and down.