Hi, I am Steven Lee, a sophomore Mechanical Engineer at the Cooper Union. ====== Mechanism ====== **Vertical Drop Hammer** (Worked on With Jon Yong) The gear with missing teeth will push the rack up until the teeth no longer mesh, and the spring will push the rack back down to the initial position. {{:labinfo:people:students2011:team_symbl:photo_7_.jpg?400}} ====== Puzzle Box ====== {{:labinfo:people:students2011:team_symbl:photo_1_.jpg?400}}