A new trapdoor for closing in recreational games tables (Machine-translation by Google Translate, not legally binding)

摘要

A new trapdoor for closing in recreational games tables, characterized by carrying a straight metal bar, which is activated by pulling it by a bolt, to a ratchet attached to a wooden plate that forms an inclined plane and that is movable for the fall of the ball recovering its primitive position by the action of a helical tension spring. (Machine-translation by Google Translate, not legally binding)