Two young divers demonstrate their newly invented diver's helmet in Fitchburg, Massachusetts.

Young men invent a diver's helmet in Fitchburg, Massachusetts. Young men help two divers get into their newly invented contraptions. The contraptions built with old boilers and cycle pumps. The two divers enter a water body as others around watch. A man holds onto the tubes attached to the two contraptions. They use cycle pumps to supply oxygen to the men under water. The divers emerge onto the water surface.