Patent for a new and improved gangway. This design consists in "[t]he combination, in an animal-trap having an inclined bottom and opposite sides, of a winch journaled at one end thereof, a movable platform mounted on the bottom and provided with opposite posts at its front end, a gate hinged to one of said posts, and opposite chains connected to the winch at one end and passing over drums located at the opposite ends of the sides, the opposite terminals of the chains being connected to the opposite posts" (lines 6-16).