Many lamps were designed to prevent accidents that required special extinguisher burners. . Frank Rhind of Brooklyn, New York, a prolific inventor in his own right, held a number of patents for safety devices. Between September 9, 1873 and May 16, 1893, Rhind held at least nine patents for extinguishers. This lamp was patented between 1873 and 1876. Many of Rhind's lamps, like the one pictured, had a ring around the collar that engaged the extinguisher mechanism. The ring was connected by a steel rod through a glass tube in the fount, to a weighted base. If knocked over or dropped, the unit was expected to extinguish the flame. The mechanism worked with a "Surprise" burner, which had two flaps to cover the flame. These burners are almost never found. This lamp is sold with an old Banner burner. There are no chips , cracks or sickness. All the original mechanism is intact except for the burner. Measures 3" H to top of collar and 3 3/4" diameter.. Nice Gothic design. Nice wear on base and great swirly imperfections as found in old glass.